configure: Correctly recurse in do_check_deps()
[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         enabled ${cfg}_checking && die "Circular dependency for $cfg."
616         disabled ${cfg}_checking && continue
617         enable ${cfg}_checking
618         append allopts $cfg
619
620         eval dep_all="\$${cfg}_deps"
621         eval dep_any="\$${cfg}_deps_any"
622         eval dep_con="\$${cfg}_conflict"
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_con dep_sel dep_sgs dep_ifa dep_ifn
629         do_check_deps $dep_all $dep_any $dep_con $dep_sel $dep_sgs $dep_ifa $dep_ifn
630         popvar cfg dep_all dep_any dep_con dep_sel dep_sgs dep_ifa dep_ifn
631
632         [ -n "$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_all $dep_con || disable $cfg
637         disabled_any $dep_sel && disable $cfg
638
639         if enabled $cfg; then
640             enable_deep $dep_sel
641             enable_deep_weak $dep_sgs
642         fi
643
644         disable ${cfg}_checking
645     done
646 }
647
648 check_deps(){
649     unset allopts
650
651     do_check_deps "$@"
652
653     for cfg in $allopts; do
654         enabled $cfg || continue
655         eval dep_extralibs="\$${cfg}_extralibs"
656         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
657     done
658 }
659
660 print_config(){
661     pfx=$1
662     files=$2
663     shift 2
664     map 'eval echo "$v \${$v:-no}"' "$@" |
665     awk "BEGIN { split(\"$files\", files) }
666         {
667             c = \"$pfx\" toupper(\$1);
668             v = \$2;
669             sub(/yes/, 1, v);
670             sub(/no/,  0, v);
671             for (f in files) {
672                 file = files[f];
673                 if (file ~ /\\.h\$/) {
674                     printf(\"#define %s %d\\n\", c, v) >>file;
675                 } else if (file ~ /\\.asm\$/) {
676                     printf(\"%%define %s %d\\n\", c, v) >>file;
677                 } else if (file ~ /\\.mak\$/) {
678                     n = -v ? \"\" : \"!\";
679                     printf(\"%s%s=yes\\n\", n, c) >>file;
680                 }
681             }
682         }"
683 }
684
685 print_enabled(){
686     suf=$1
687     shift
688     for v; do
689         enabled $v && printf "%s\n" ${v%$suf}
690     done
691 }
692
693 append(){
694     var=$1
695     shift
696     eval "$var=\"\$$var $*\""
697 }
698
699 prepend(){
700     var=$1
701     shift
702     eval "$var=\"$* \$$var\""
703 }
704
705 unique(){
706     var=$1
707     uniq_list=""
708     for tok in $(eval echo \$$var); do
709         uniq_list="$(filter_out $tok $uniq_list) $tok"
710     done
711     eval "$var=\"${uniq_list}\""
712 }
713
714 add_cppflags(){
715     append CPPFLAGS "$@"
716 }
717
718 add_cflags(){
719     append CFLAGS $($cflags_filter "$@")
720 }
721
722 add_cflags_headers(){
723     append CFLAGS_HEADERS $($cflags_filter "$@")
724 }
725
726 add_asflags(){
727     append ASFLAGS $($asflags_filter "$@")
728 }
729
730 add_objcflags(){
731     append OBJCFLAGS $($objcflags_filter "$@")
732 }
733
734 add_ldflags(){
735     append LDFLAGS $($ldflags_filter "$@")
736 }
737
738 add_ldexeflags(){
739     append LDEXEFLAGS $($ldflags_filter "$@")
740 }
741
742 add_stripflags(){
743     append STRIPFLAGS "$@"
744 }
745
746 add_extralibs(){
747     prepend extralibs $($ldflags_filter "$@")
748 }
749
750 add_host_cppflags(){
751     append host_cppflags "$@"
752 }
753
754 add_host_cflags(){
755     append host_cflags $($host_cflags_filter "$@")
756 }
757
758 add_host_ldflags(){
759     append host_ldflags $($host_ldflags_filter "$@")
760 }
761
762 add_compat(){
763     append compat_objs $1
764     shift
765     map 'add_cppflags -D$v' "$@"
766 }
767
768 check_cmd(){
769     log "$@"
770     "$@" >> $logfile 2>&1
771 }
772
773 cc_o(){
774     eval printf '%s\\n' $CC_O
775 }
776
777 cc_e(){
778     eval printf '%s\\n' $CC_E
779 }
780
781 check_cc(){
782     log check_cc "$@"
783     cat > $TMPC
784     log_file $TMPC
785     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
786 }
787
788 check_objcc(){
789     log check_objcc "$@"
790     cat > $TMPC
791     log_file $TMPC
792     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
793 }
794
795 check_cpp(){
796     log check_cpp "$@"
797     cat > $TMPC
798     log_file $TMPC
799     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
800 }
801
802 as_o(){
803     eval printf '%s\\n' $AS_O
804 }
805
806 check_as(){
807     log check_as "$@"
808     cat > $TMPS
809     log_file $TMPS
810     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
811 }
812
813 check_inline_asm(){
814     log check_inline_asm "$@"
815     name="$1"
816     code="$2"
817     shift 2
818     disable $name
819     check_cc "$@" <<EOF && enable $name
820 void foo(void){ __asm__ volatile($code); }
821 EOF
822 }
823
824 check_insn(){
825     log check_insn "$@"
826     check_inline_asm ${1}_inline "\"$2\""
827     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
828 }
829
830 check_yasm(){
831     log check_yasm "$@"
832     echo "$1" > $TMPS
833     log_file $TMPS
834     shift 1
835     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
836 }
837
838 ld_o(){
839     eval printf '%s\\n' $LD_O
840 }
841
842 check_ld(){
843     log check_ld "$@"
844     flags=$(filter_out '-l*' "$@")
845     libs=$(filter '-l*' "$@")
846     check_cc $($cflags_filter $flags) || return
847     flags=$($ldflags_filter $flags)
848     libs=$($ldflags_filter $libs)
849     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
850 }
851
852 print_include(){
853     hdr=$1
854     test "${hdr%.h}" = "${hdr}" &&
855         echo "#include $hdr"    ||
856         echo "#include <$hdr>"
857 }
858
859 check_code(){
860     log check_code "$@"
861     check=$1
862     headers=$2
863     code=$3
864     shift 3
865     {
866         for hdr in $headers; do
867             print_include $hdr
868         done
869         echo "int main(void) { $code; return 0; }"
870     } | check_$check "$@"
871 }
872
873 check_cppflags(){
874     log check_cppflags "$@"
875     check_cpp "$@" <<EOF && append CPPFLAGS "$@"
876 #include <stdlib.h>;
877 EOF
878 }
879
880 test_cflags(){
881     log test_cflags "$@"
882     set -- $($cflags_filter "$@")
883     check_cc "$@" <<EOF
884 int x;
885 EOF
886 }
887
888 check_cflags(){
889     log check_cflags "$@"
890     test_cflags "$@" && add_cflags "$@"
891 }
892
893 test_objcflags(){
894     log test_objcflags "$@"
895     set -- $($objcflags_filter "$@")
896     check_objcc "$@" <<EOF
897 int x;
898 EOF
899 }
900
901 check_objcflags(){
902     log check_objcflags "$@"
903     test_objcflags "$@" && add_objcflags "$@"
904 }
905
906 test_ldflags(){
907     log test_ldflags "$@"
908     check_ld "$@" <<EOF
909 int main(void){ return 0; }
910 EOF
911 }
912
913 check_ldflags(){
914     log check_ldflags "$@"
915     test_ldflags "$@" && add_ldflags "$@"
916 }
917
918 test_stripflags(){
919     log test_stripflags "$@"
920     # call check_cc to get a fresh TMPO
921     check_cc <<EOF
922 int main(void) { return 0; }
923 EOF
924     check_cmd $strip $STRIPFLAGS "$@" $TMPO
925 }
926
927 check_stripflags(){
928     log check_stripflags "$@"
929     test_stripflags "$@" && add_stripflags "$@"
930 }
931
932 check_header(){
933     log check_header "$@"
934     header=$1
935     shift
936     disable_safe $header
937     check_cpp "$@" <<EOF && enable_safe $header
938 #include <$header>
939 int x;
940 EOF
941 }
942
943 check_func(){
944     log check_func "$@"
945     func=$1
946     shift
947     disable $func
948     check_ld "$@" <<EOF && enable $func
949 extern int $func();
950 int main(void){ $func(); }
951 EOF
952 }
953
954 check_mathfunc(){
955     log check_mathfunc "$@"
956     func=$1
957     narg=$2
958     shift 2
959     test $narg = 2 && args="f, g" || args="f"
960     disable $func
961     check_ld "$@" <<EOF && enable $func
962 #include <math.h>
963 float foo(float f, float g) { return $func($args); }
964 int main(void){ return 0; }
965 EOF
966 }
967
968 check_func_headers(){
969     log check_func_headers "$@"
970     headers=$1
971     funcs=$2
972     shift 2
973     {
974         for hdr in $headers; do
975             print_include $hdr
976         done
977         for func in $funcs; do
978             echo "long check_$func(void) { return (long) $func; }"
979         done
980         echo "int main(void) { return 0; }"
981     } | check_ld "$@" && enable $funcs && enable_safe $headers
982 }
983
984 check_cpp_condition(){
985     log check_cpp_condition "$@"
986     header=$1
987     condition=$2
988     shift 2
989     check_cpp "$@" <<EOF
990 #include <$header>
991 #if !($condition)
992 #error "unsatisfied condition: $condition"
993 #endif
994 EOF
995 }
996
997 test_cflags_cpp(){
998     log test_cflags_cpp "$@"
999     flags=$1
1000     condition=$2
1001     shift 2
1002     set -- $($cflags_filter "$flags")
1003     check_cpp "$@" <<EOF
1004 #if !($condition)
1005 #error "unsatisfied condition: $condition"
1006 #endif
1007 EOF
1008 }
1009
1010 check_lib(){
1011     log check_lib "$@"
1012     name="$1"
1013     headers="$2"
1014     funcs="$3"
1015     shift 3
1016     disable $name
1017     check_func_headers "$headers" "$funcs" "$@" &&
1018         enable $name && add_extralibs "$@"
1019 }
1020
1021 check_pkg_config(){
1022     log check_pkg_config "$@"
1023     pkg_version="$1"
1024     pkg="${1%% *}"
1025     headers="$2"
1026     funcs="$3"
1027     shift 3
1028     check_cmd $pkg_config --exists --print-errors $pkg_version || return
1029     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1030     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1031     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1032         set_safe "${pkg}_cflags"    $pkg_cflags &&
1033         set_safe "${pkg}_extralibs" $pkg_libs
1034 }
1035
1036 check_exec(){
1037     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1038 }
1039
1040 check_exec_crash(){
1041     log check_exec_crash "$@"
1042     code=$(cat)
1043
1044     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1045     # are safe but may not be available everywhere.  Thus we use
1046     # raise(SIGTERM) instead.  The check is run in a subshell so we
1047     # can redirect the "Terminated" message from the shell.  SIGBUS
1048     # is not defined by standard C so it is used conditionally.
1049
1050     (check_exec "$@") >> $logfile 2>&1 <<EOF
1051 #include <signal.h>
1052 static void sighandler(int sig){
1053     raise(SIGTERM);
1054 }
1055 int foo(void){
1056     $code
1057 }
1058 int (*func_ptr)(void) = foo;
1059 int main(void){
1060     signal(SIGILL, sighandler);
1061     signal(SIGFPE, sighandler);
1062     signal(SIGSEGV, sighandler);
1063 #ifdef SIGBUS
1064     signal(SIGBUS, sighandler);
1065 #endif
1066     return func_ptr();
1067 }
1068 EOF
1069 }
1070
1071 check_type(){
1072     log check_type "$@"
1073     headers=$1
1074     type=$2
1075     shift 2
1076     disable_safe "$type"
1077     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1078 }
1079
1080 check_struct(){
1081     log check_struct "$@"
1082     headers=$1
1083     struct=$2
1084     member=$3
1085     shift 3
1086     disable_safe "${struct}_${member}"
1087     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1088         enable_safe "${struct}_${member}"
1089 }
1090
1091 check_builtin(){
1092     log check_builtin "$@"
1093     name=$1
1094     headers=$2
1095     builtin=$3
1096     shift 3
1097     disable "$name"
1098     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1099 }
1100
1101 check_compile_assert(){
1102     log check_compile_assert "$@"
1103     name=$1
1104     headers=$2
1105     condition=$3
1106     shift 3
1107     disable "$name"
1108     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1109 }
1110
1111 require(){
1112     log require "$@"
1113     name_version="$1"
1114     name="${1%% *}"
1115     headers="$2"
1116     func="$3"
1117     shift 3
1118     check_lib $name "$headers" $func "$@" || die "ERROR: $name_version not found"
1119 }
1120
1121 require_header(){
1122     log require "$@"
1123     header="$1"
1124     shift
1125     check_header "$header" "$@" || die "ERROR: $header not found"
1126 }
1127
1128 require_cpp_condition(){
1129     log require "$@"
1130     header="$1"
1131     condition="$2"
1132     shift 2
1133     check_cpp_condition "$header" "$condition" "$@" || die "ERROR: $condition not satisfied"
1134 }
1135
1136 require_pkg_config(){
1137     log require_pkg_config "$@"
1138     name="$1"
1139     shift
1140     pkg_version="$1"
1141     pkg="${1%% *}"
1142     test "$name" = "" && name=$pkg
1143     check_pkg_config "$@" || die "ERROR: $pkg_version not found"
1144     add_cflags    $(get_safe "${pkg}_cflags")
1145     add_extralibs $(get_safe "${pkg}_extralibs")
1146 }
1147
1148 hostcc_e(){
1149     eval printf '%s\\n' $HOSTCC_E
1150 }
1151
1152 hostcc_o(){
1153     eval printf '%s\\n' $HOSTCC_O
1154 }
1155
1156 check_host_cc(){
1157     log check_host_cc "$@"
1158     cat > $TMPC
1159     log_file $TMPC
1160     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1161 }
1162
1163 check_host_cpp(){
1164     log check_host_cpp "$@"
1165     cat > $TMPC
1166     log_file $TMPC
1167     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1168 }
1169
1170 check_host_cppflags(){
1171     log check_host_cppflags "$@"
1172     check_host_cpp "$@" <<EOF && append host_cppflags "$@"
1173 #include <stdlib.h>;
1174 EOF
1175 }
1176
1177 check_host_cflags(){
1178     log check_host_cflags "$@"
1179     set -- $($host_cflags_filter "$@")
1180     check_host_cc "$@" <<EOF && append host_cflags "$@"
1181 int x;
1182 EOF
1183 }
1184
1185 check_host_cpp_condition(){
1186     log check_host_cpp_condition "$@"
1187     header=$1
1188     condition=$2
1189     shift 2
1190     check_host_cpp "$@" <<EOF
1191 #include <$header>
1192 #if !($condition)
1193 #error "unsatisfied condition: $condition"
1194 #endif
1195 EOF
1196 }
1197
1198 apply(){
1199     file=$1
1200     shift
1201     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1202 }
1203
1204 cp_if_changed(){
1205     cmp -s "$1" "$2" && { test "$quiet" != "yes" && echo "$2 is unchanged"; } && return
1206     mkdir -p "$(dirname $2)"
1207     cp -f "$1" "$2"
1208 }
1209
1210 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1211 # system-dependent things.
1212
1213 AVCODEC_COMPONENTS="
1214     bsfs
1215     decoders
1216     encoders
1217     hwaccels
1218     parsers
1219 "
1220
1221 AVDEVICE_COMPONENTS="
1222     indevs
1223     outdevs
1224 "
1225 AVFILTER_COMPONENTS="
1226     filters
1227 "
1228 AVFORMAT_COMPONENTS="
1229     demuxers
1230     muxers
1231     protocols
1232 "
1233
1234 AVRESAMPLE_COMPONENTS=""
1235 AVUTIL_COMPONENTS=""
1236
1237 COMPONENT_LIST="
1238     $AVCODEC_COMPONENTS
1239     $AVDEVICE_COMPONENTS
1240     $AVFILTER_COMPONENTS
1241     $AVFORMAT_COMPONENTS
1242     $AVRESAMPLE_COMPONENTS
1243     $AVUTIL_COMPONENTS
1244 "
1245
1246 EXAMPLE_LIST="
1247     decode_audio_example
1248     decode_video_example
1249     encode_audio_example
1250     encode_video_example
1251     filter_audio_example
1252     metadata_example
1253     output_example
1254     qsvdec_example
1255     transcode_aac_example
1256 "
1257
1258 HWACCEL_LIBRARY_NONFREE_LIST="
1259     cuda
1260     libnpp
1261 "
1262 HWACCEL_LIBRARY_LIST="
1263     $HWACCEL_LIBRARY_NONFREE_LIST
1264     d3d11va
1265     dxva2
1266     libmfx
1267     mmal
1268     nvenc
1269     omx
1270     vaapi
1271     vda
1272     vdpau
1273 "
1274
1275 EXTERNAL_LIBRARY_GPL_LIST="
1276     libcdio
1277     libx264
1278     libx265
1279     libxavs
1280     libxvid
1281 "
1282
1283 EXTERNAL_LIBRARY_NONFREE_LIST="
1284     libfaac
1285     libfdk_aac
1286     openssl
1287 "
1288
1289 EXTERNAL_LIBRARY_VERSION3_LIST="
1290     libopencore_amrnb
1291     libopencore_amrwb
1292     libvo_aacenc
1293     libvo_amrwbenc
1294 "
1295
1296 EXTERNAL_LIBRARY_LIST="
1297     $EXTERNAL_LIBRARY_GPL_LIST
1298     $EXTERNAL_LIBRARY_NONFREE_LIST
1299     $EXTERNAL_LIBRARY_VERSION3_LIST
1300     avisynth
1301     avxsynth
1302     bzlib
1303     frei0r
1304     gnutls
1305     libbs2b
1306     libdc1394
1307     libdcadec
1308     libfontconfig
1309     libfreetype
1310     libgsm
1311     libhdcd
1312     libilbc
1313     libkvazaar
1314     libmp3lame
1315     libopencv
1316     libopenh264
1317     libopenjpeg
1318     libopus
1319     libpulse
1320     librtmp
1321     libschroedinger
1322     libsnappy
1323     libspeex
1324     libtheora
1325     libtwolame
1326     libvorbis
1327     libvpx
1328     libwavpack
1329     libwebp
1330     libxcb
1331     libxcb_shm
1332     libxcb_xfixes
1333     zlib
1334 "
1335
1336 FEATURE_LIST="
1337     gray
1338     hardcoded_tables
1339     omx_rpi
1340     runtime_cpudetect
1341     safe_bitstream_reader
1342     shared
1343     small
1344     sram
1345     static
1346     swscale_alpha
1347 "
1348
1349 LIBRARY_LIST="
1350     avcodec
1351     avdevice
1352     avfilter
1353     avformat
1354     avresample
1355     avutil
1356     swscale
1357 "
1358
1359 LICENSE_LIST="
1360     gpl
1361     nonfree
1362     version3
1363 "
1364
1365 PROGRAM_LIST="
1366     avconv
1367     avplay
1368     avprobe
1369 "
1370
1371 SUBSYSTEM_LIST="
1372     dct
1373     doc
1374     error_resilience
1375     faan
1376     fft
1377     lsp
1378     lzo
1379     mdct
1380     network
1381     rdft
1382 "
1383
1384 # COMPONENT_LIST needs to come last to ensure correct dependency checking
1385 CONFIG_LIST="
1386     $EXAMPLE_LIST
1387     $EXTERNAL_LIBRARY_LIST
1388     $HWACCEL_LIBRARY_LIST
1389     $FEATURE_LIST
1390     $LICENSE_LIST
1391     $LIBRARY_LIST
1392     $PROGRAM_LIST
1393     $SUBSYSTEM_LIST
1394     neon_clobber_test
1395     pic
1396     pod2man
1397     texi2html
1398     thumb
1399     valgrind_backtrace
1400     xmm_clobber_test
1401     $COMPONENT_LIST
1402 "
1403
1404 THREADS_LIST="
1405     pthreads
1406     w32threads
1407 "
1408
1409 ATOMICS_LIST="
1410     atomics_gcc
1411     atomics_suncc
1412     atomics_win32
1413 "
1414
1415 ARCH_LIST="
1416     aarch64
1417     alpha
1418     arm
1419     avr32
1420     avr32_ap
1421     avr32_uc
1422     bfin
1423     ia64
1424     m68k
1425     mips
1426     mips64
1427     parisc
1428     ppc
1429     ppc64
1430     s390
1431     sh4
1432     sparc
1433     sparc64
1434     tilegx
1435     tilepro
1436     tomi
1437     x86
1438     x86_32
1439     x86_64
1440 "
1441
1442 ARCH_EXT_LIST_ARM="
1443     armv5te
1444     armv6
1445     armv6t2
1446     armv8
1447     neon
1448     vfp
1449     vfpv3
1450 "
1451
1452 ARCH_EXT_LIST_X86_SIMD="
1453     amd3dnow
1454     amd3dnowext
1455     avx
1456     avx2
1457     fma3
1458     fma4
1459     mmx
1460     mmxext
1461     sse
1462     sse2
1463     sse3
1464     sse4
1465     sse42
1466     ssse3
1467     xop
1468 "
1469
1470 ARCH_EXT_LIST_PPC="
1471     altivec
1472     dcbzl
1473     ldbrx
1474     power8
1475     ppc4xx
1476     vsx
1477 "
1478
1479 ARCH_EXT_LIST_X86="
1480     $ARCH_EXT_LIST_X86_SIMD
1481     cpunop
1482     i686
1483 "
1484
1485 ARCH_EXT_LIST_MIPS="
1486     loongson
1487     mips32r1
1488     mips64r1
1489     mips32r2
1490     mips64r2
1491     mips32r6
1492     mips64r6
1493 "
1494
1495 ARCH_EXT_LIST="
1496     $ARCH_EXT_LIST_ARM
1497     $ARCH_EXT_LIST_MIPS
1498     $ARCH_EXT_LIST_PPC
1499     $ARCH_EXT_LIST_X86
1500     vis
1501 "
1502
1503 ARCH_FEATURES="
1504     aligned_stack
1505     fast_64bit
1506     fast_clz
1507     fast_cmov
1508     local_aligned_8
1509     local_aligned_16
1510     local_aligned_32
1511     simd_align_16
1512     simd_align_32
1513 "
1514
1515 BUILTIN_LIST="
1516     atomic_cas_ptr
1517     machine_rw_barrier
1518     MemoryBarrier
1519     mm_empty
1520     rdtsc
1521     sem_timedwait
1522     sync_val_compare_and_swap
1523 "
1524 HAVE_LIST_CMDLINE="
1525     inline_asm
1526     symver
1527     yasm
1528 "
1529
1530 HAVE_LIST_PUB="
1531     bigendian
1532     fast_unaligned
1533 "
1534
1535 HEADERS_LIST="
1536     AVFoundation_AVFoundation_h
1537     alsa_asoundlib_h
1538     altivec_h
1539     arpa_inet_h
1540     cdio_paranoia_h
1541     cdio_paranoia_paranoia_h
1542     d3d11_h
1543     dispatch_dispatch_h
1544     dev_bktr_ioctl_bt848_h
1545     dev_bktr_ioctl_meteor_h
1546     dev_ic_bt8xx_h
1547     dev_video_bktr_ioctl_bt848_h
1548     dev_video_meteor_ioctl_meteor_h
1549     direct_h
1550     dlfcn_h
1551     dxva_h
1552     gsm_h
1553     io_h
1554     mach_mach_time_h
1555     machine_ioctl_bt848_h
1556     machine_ioctl_meteor_h
1557     malloc_h
1558     poll_h
1559     sndio_h
1560     soundcard_h
1561     stdatomic_h
1562     sys_mman_h
1563     sys_param_h
1564     sys_resource_h
1565     sys_select_h
1566     sys_soundcard_h
1567     sys_time_h
1568     sys_un_h
1569     sys_videoio_h
1570     unistd_h
1571     valgrind_valgrind_h
1572     windows_h
1573     winsock2_h
1574 "
1575
1576 INTRINSICS_LIST="
1577     intrinsics_neon
1578 "
1579
1580 MATH_FUNCS="
1581     atanf
1582     atan2f
1583     cbrtf
1584     cosf
1585     exp2
1586     exp2f
1587     expf
1588     isinf
1589     isnan
1590     ldexpf
1591     llrint
1592     llrintf
1593     log2
1594     log2f
1595     log10f
1596     lrint
1597     lrintf
1598     powf
1599     rint
1600     round
1601     roundf
1602     sinf
1603     trunc
1604     truncf
1605 "
1606
1607 SYSTEM_FUNCS="
1608     aligned_malloc
1609     clock_gettime
1610     closesocket
1611     CommandLineToArgvW
1612     CoTaskMemFree
1613     CryptGenRandom
1614     dlopen
1615     fcntl
1616     flt_lim
1617     fork
1618     getaddrinfo
1619     gethrtime
1620     getopt
1621     GetProcessAffinityMask
1622     GetProcessMemoryInfo
1623     GetProcessTimes
1624     getrusage
1625     GetSystemTimeAsFileTime
1626     gettimeofday
1627     gmtime_r
1628     inet_aton
1629     isatty
1630     jack_port_get_latency_range
1631     LoadLibrary
1632     localtime_r
1633     mach_absolute_time
1634     MapViewOfFile
1635     memalign
1636     mkstemp
1637     mmap
1638     mprotect
1639     nanosleep
1640     posix_memalign
1641     sched_getaffinity
1642     SetConsoleTextAttribute
1643     setmode
1644     setrlimit
1645     Sleep
1646     strerror_r
1647     sysconf
1648     sysctl
1649     usleep
1650     VirtualAlloc
1651 "
1652
1653 TOOLCHAIN_FEATURES="
1654     as_dn_directive
1655     as_fpu_directive
1656     as_func
1657     as_object_arch
1658     asm_mod_q
1659     attribute_may_alias
1660     attribute_packed
1661     blocks_extension
1662     ebp_available
1663     ebx_available
1664     gnu_as
1665     ibm_asm
1666     inline_asm_labels
1667     pragma_deprecated
1668     symver_asm_label
1669     symver_gnu_asm
1670     vfp_args
1671     xform_asm
1672     xmm_clobbers
1673 "
1674
1675 TYPES_LIST="
1676     CONDITION_VARIABLE_Ptr
1677     socklen_t
1678     struct_addrinfo
1679     struct_group_source_req
1680     struct_ip_mreq_source
1681     struct_ipv6_mreq
1682     struct_pollfd
1683     struct_rusage_ru_maxrss
1684     struct_sockaddr_in6
1685     struct_sockaddr_sa_len
1686     struct_sockaddr_storage
1687     struct_v4l2_frmivalenum_discrete
1688 "
1689
1690 HAVE_LIST="
1691     $ARCH_EXT_LIST
1692     $(add_suffix _external $ARCH_EXT_LIST)
1693     $(add_suffix _inline   $ARCH_EXT_LIST)
1694     $ARCH_FEATURES
1695     $BUILTIN_LIST
1696     $HAVE_LIST_CMDLINE
1697     $HAVE_LIST_PUB
1698     $HEADERS_LIST
1699     $INTRINSICS_LIST
1700     $MATH_FUNCS
1701     $SYSTEM_FUNCS
1702     $THREADS_LIST
1703     $TOOLCHAIN_FEATURES
1704     $TYPES_LIST
1705     dos_paths
1706     dxva2_lib
1707     libc_msvcrt
1708     MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
1709     sdl
1710     section_data_rel_ro
1711     threads
1712     vaapi_drm
1713     vaapi_x11
1714     vdpau_x11
1715 "
1716
1717 # options emitted with CONFIG_ prefix but not available on the command line
1718 CONFIG_EXTRA="
1719     aandcttables
1720     ac3dsp
1721     audio_frame_queue
1722     audiodsp
1723     blockdsp
1724     bswapdsp
1725     cabac
1726     dirac_parse
1727     dvprofile
1728     faandct
1729     faanidct
1730     fdctdsp
1731     flacdsp
1732     fmtconvert
1733     g722dsp
1734     gmp
1735     golomb
1736     gplv3
1737     h263dsp
1738     h264chroma
1739     h264dsp
1740     h264parse
1741     h264pred
1742     h264qpel
1743     hevc_ps
1744     hpeldsp
1745     huffman
1746     huffyuvdsp
1747     huffyuvencdsp
1748     idctdsp
1749     iirfilter
1750     imdct15
1751     intrax8
1752     iso_media
1753     ividsp
1754     jpegtables
1755     libx262
1756     lgplv3
1757     lpc
1758     lzf
1759     me_cmp
1760     mpeg_er
1761     mpegaudio
1762     mpegaudiodsp
1763     mpegaudioheader
1764     mpegvideo
1765     mpegvideoenc
1766     mss34dsp
1767     pixblockdsp
1768     qpeldsp
1769     qsv
1770     qsvdec
1771     qsvenc
1772     rangecoder
1773     riffdec
1774     riffenc
1775     rtpdec
1776     rtpenc_chain
1777     rv34dsp
1778     sinewin
1779     snappy
1780     srtp
1781     startcode
1782     texturedsp
1783     texturedspenc
1784     tpeldsp
1785     vaapi_encode
1786     vc1dsp
1787     videodsp
1788     vp3dsp
1789     vp56dsp
1790     vp8dsp
1791     wma_freqs
1792     wmv2dsp
1793 "
1794
1795 CMDLINE_SELECT="
1796     $ARCH_EXT_LIST
1797     $CONFIG_LIST
1798     $HAVE_LIST_CMDLINE
1799     $THREADS_LIST
1800     asm
1801     cross_compile
1802     debug
1803     extra_warnings
1804     logging
1805     lto
1806     optimizations
1807     rpath
1808 "
1809
1810 PATHS_LIST="
1811     bindir
1812     datadir
1813     docdir
1814     incdir
1815     libdir
1816     mandir
1817     prefix
1818     shlibdir
1819 "
1820
1821 CMDLINE_SET="
1822     $PATHS_LIST
1823     ar
1824     arch
1825     as
1826     cc
1827     objcc
1828     cpu
1829     cross_prefix
1830     custom_allocator
1831     dep_cc
1832     env
1833     extra_version
1834     host_cc
1835     host_cflags
1836     host_extralibs
1837     host_ld
1838     host_ldflags
1839     host_os
1840     ignore_tests
1841     ld
1842     logfile
1843     malloc_prefix
1844     nm
1845     optflags
1846     pkg_config
1847     pkg_config_flags
1848     random_seed
1849     samples
1850     sysinclude
1851     sysroot
1852     target_exec
1853     target_os
1854     target_path
1855     target_samples
1856     toolchain
1857 "
1858
1859 CMDLINE_APPEND="
1860     extra_cflags
1861     extra_objcflags
1862     host_cppflags
1863 "
1864
1865 # code dependency declarations
1866
1867 # architecture extensions
1868
1869 armv5te_deps="arm"
1870 armv6_deps="arm"
1871 armv6t2_deps="arm"
1872 armv8_deps="aarch64"
1873 neon_deps_any="aarch64 arm"
1874 intrinsics_neon_deps="neon"
1875 vfp_deps_any="aarch64 arm"
1876 vfpv3_deps="vfp"
1877
1878 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1879
1880 altivec_deps="ppc"
1881 ppc4xx_deps="ppc"
1882 vsx_deps="altivec"
1883 power8_deps="vsx"
1884
1885 cpunop_deps="i686"
1886 x86_64_select="i686"
1887 x86_64_suggest="fast_cmov"
1888
1889 amd3dnow_deps="mmx"
1890 amd3dnowext_deps="amd3dnow"
1891 i686_deps="x86"
1892 mmx_deps="x86"
1893 mmxext_deps="mmx"
1894 sse_deps="mmxext"
1895 sse2_deps="sse"
1896 sse3_deps="sse2"
1897 ssse3_deps="sse3"
1898 sse4_deps="ssse3"
1899 sse42_deps="sse4"
1900 avx_deps="sse42"
1901 xop_deps="avx"
1902 fma3_deps="avx"
1903 fma4_deps="avx"
1904 avx2_deps="avx"
1905
1906 mmx_external_deps="yasm"
1907 mmx_inline_deps="inline_asm"
1908 mmx_suggest="mmx_external mmx_inline"
1909
1910 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1911     eval dep=\$${ext}_deps
1912     eval ${ext}_external_deps='"${dep}_external"'
1913     eval ${ext}_inline_deps='"${dep}_inline"'
1914     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1915 done
1916
1917 aligned_stack_if_any="aarch64 ppc x86"
1918 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1919 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1920 fast_unaligned_if_any="aarch64 ppc x86"
1921 simd_align_16_if_any="altivec neon sse"
1922 simd_align_32_if_any="avx"
1923
1924 # system capabilities
1925 symver_if_any="symver_asm_label symver_gnu_asm"
1926 valgrind_backtrace_conflict="optimizations"
1927 valgrind_backtrace_deps="valgrind_valgrind_h"
1928
1929 # threading support
1930 atomics_gcc_if="sync_val_compare_and_swap"
1931 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1932 atomics_win32_if="MemoryBarrier"
1933 atomics_native_if_any="$ATOMICS_LIST"
1934 w32threads_deps="atomics_native"
1935 threads_if_any="$THREADS_LIST"
1936
1937 # subsystems
1938 dct_select="rdft"
1939 dirac_parse_select="golomb"
1940 error_resilience_select="me_cmp"
1941 faandct_deps="faan fdctdsp"
1942 faanidct_deps="faan idctdsp"
1943 h264dsp_select="startcode"
1944 hevc_ps_select="golomb"
1945 intrax8_select="blockdsp idctdsp"
1946 mdct_select="fft"
1947 rdft_select="fft"
1948 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1949 mpeg_er_select="error_resilience"
1950 mpegaudio_select="mpegaudiodsp mpegaudioheader"
1951 mpegaudiodsp_select="dct"
1952 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp mpeg_er videodsp"
1953 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1954 vc1dsp_select="h264chroma qpeldsp startcode"
1955
1956 # decoders / encoders
1957 aac_decoder_select="imdct15 mdct sinewin"
1958 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1959 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1960 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1961 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1962 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1963 adpcm_g722_decoder_select="g722dsp"
1964 adpcm_g722_encoder_select="g722dsp"
1965 aic_decoder_select="golomb idctdsp"
1966 alac_encoder_select="lpc"
1967 als_decoder_select="bswapdsp"
1968 amrnb_decoder_select="lsp"
1969 amrwb_decoder_select="lsp"
1970 amv_decoder_select="sp5x_decoder"
1971 ape_decoder_select="bswapdsp"
1972 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1973 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1974 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1975 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1976 atrac1_decoder_select="mdct sinewin"
1977 atrac3_decoder_select="mdct"
1978 atrac3p_decoder_select="mdct sinewin"
1979 bink_decoder_select="blockdsp hpeldsp"
1980 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1981 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1982 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1983 cllc_decoder_select="bswapdsp"
1984 comfortnoise_encoder_select="lpc"
1985 cook_decoder_select="audiodsp mdct sinewin"
1986 cscd_decoder_select="lzo"
1987 cscd_decoder_suggest="zlib"
1988 dca_decoder_select="fmtconvert mdct"
1989 dds_decoder_select="texturedsp"
1990 dnxhd_decoder_select="blockdsp idctdsp"
1991 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1992 dvvideo_decoder_select="dvprofile idctdsp"
1993 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1994 dxa_decoder_deps="zlib"
1995 dxv_decoder_select="lzf texturedsp"
1996 eac3_decoder_select="ac3_decoder"
1997 eac3_encoder_select="ac3_encoder"
1998 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1999 eatgq_decoder_select="aandcttables idctdsp"
2000 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
2001 exr_decoder_deps="zlib"
2002 ffv1_decoder_select="rangecoder"
2003 ffv1_encoder_select="rangecoder"
2004 ffvhuff_decoder_select="huffyuv_decoder"
2005 ffvhuff_encoder_select="huffyuv_encoder"
2006 fic_decoder_select="golomb"
2007 flac_decoder_select="flacdsp"
2008 flac_encoder_select="bswapdsp flacdsp lpc"
2009 flashsv_decoder_deps="zlib"
2010 flashsv_encoder_deps="zlib"
2011 flashsv2_decoder_deps="zlib"
2012 flv_decoder_select="h263_decoder"
2013 flv_encoder_select="h263_encoder"
2014 fourxm_decoder_select="blockdsp bswapdsp"
2015 fraps_decoder_select="bswapdsp huffman"
2016 g2m_decoder_deps="zlib"
2017 g2m_decoder_select="blockdsp idctdsp jpegtables"
2018 h261_decoder_select="mpeg_er mpegvideo"
2019 h261_encoder_select="aandcttables mpegvideoenc"
2020 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
2021 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
2022 h263i_decoder_select="h263_decoder"
2023 h263p_encoder_select="h263_encoder"
2024 h264_decoder_select="cabac golomb h264chroma h264dsp h264parse h264pred h264qpel videodsp"
2025 h264_decoder_suggest="error_resilience"
2026 hap_decoder_select="snappy texturedsp"
2027 hap_encoder_deps="libsnappy"
2028 hap_encoder_select="texturedspenc"
2029 hevc_decoder_select="bswapdsp cabac hevc_ps videodsp"
2030 huffyuv_decoder_select="bswapdsp huffyuvdsp"
2031 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
2032 iac_decoder_select="imc_decoder"
2033 imc_decoder_select="bswapdsp fft mdct sinewin"
2034 indeo3_decoder_select="hpeldsp"
2035 indeo4_decoder_select="ividsp"
2036 indeo5_decoder_select="ividsp"
2037 interplay_video_decoder_select="hpeldsp"
2038 jpegls_decoder_select="mjpeg_decoder"
2039 jv_decoder_select="blockdsp"
2040 lagarith_decoder_select="huffyuvdsp"
2041 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
2042 magicyuv_decoder_select="huffyuvdsp"
2043 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2044 metasound_decoder_select="lsp mdct sinewin"
2045 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2046 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
2047 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
2048 mjpegb_decoder_select="mjpeg_decoder"
2049 mlp_decoder_select="mlp_parser"
2050 motionpixels_decoder_select="bswapdsp"
2051 mp1_decoder_select="mpegaudio"
2052 mp1float_decoder_select="mpegaudio"
2053 mp2_decoder_select="mpegaudio"
2054 mp2float_decoder_select="mpegaudio"
2055 mp3_decoder_select="mpegaudio"
2056 mp3adu_decoder_select="mpegaudio"
2057 mp3adufloat_decoder_select="mpegaudio"
2058 mp3float_decoder_select="mpegaudio"
2059 mp3on4_decoder_select="mpegaudio"
2060 mp3on4float_decoder_select="mpegaudio"
2061 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2062 mpc8_decoder_select="mpegaudiodsp"
2063 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2064 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2065 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2066 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2067 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2068 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2069 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2070 mpeg4_encoder_select="h263_encoder"
2071 msa1_decoder_select="mss34dsp"
2072 msmpeg4v1_decoder_select="h263_decoder"
2073 msmpeg4v2_decoder_select="h263_decoder"
2074 msmpeg4v2_encoder_select="h263_encoder"
2075 msmpeg4v3_decoder_select="h263_decoder"
2076 msmpeg4v3_encoder_select="h263_encoder"
2077 mss2_decoder_select="error_resilience mpeg_er mpegvideo qpeldsp vc1_decoder"
2078 mts2_decoder_select="mss34dsp"
2079 mxpeg_decoder_select="mjpeg_decoder"
2080 nellymoser_decoder_select="mdct sinewin"
2081 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2082 nuv_decoder_select="idctdsp lzo"
2083 on2avc_decoder_select="mdct"
2084 opus_decoder_deps="avresample"
2085 opus_decoder_select="imdct15"
2086 png_decoder_deps="zlib"
2087 png_encoder_deps="zlib"
2088 png_encoder_select="huffyuvencdsp"
2089 prores_decoder_select="idctdsp"
2090 prores_encoder_select="fdctdsp"
2091 qcelp_decoder_select="lsp"
2092 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2093 ra_144_encoder_select="audio_frame_queue lpc"
2094 ralf_decoder_select="golomb"
2095 rscc_decoder_deps="zlib"
2096 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2097 rv10_encoder_select="h263_encoder"
2098 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2099 rv20_encoder_select="h263_encoder"
2100 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2101 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2102 screenpresso_decoder_deps="zlib"
2103 sipr_decoder_select="lsp"
2104 sp5x_decoder_select="mjpeg_decoder"
2105 svq1_decoder_select="hpeldsp"
2106 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2107 svq3_decoder_select="golomb h264dsp h264parse h264pred hpeldsp tpeldsp videodsp"
2108 svq3_decoder_suggest="zlib"
2109 tak_decoder_select="audiodsp"
2110 tdsc_decoder_deps="zlib"
2111 tdsc_decoder_select="mjpeg_decoder"
2112 theora_decoder_select="vp3_decoder"
2113 thp_decoder_select="mjpeg_decoder"
2114 tiff_decoder_suggest="zlib"
2115 tiff_encoder_suggest="zlib"
2116 truehd_decoder_select="mlp_decoder"
2117 truemotion2_decoder_select="bswapdsp"
2118 truespeech_decoder_select="bswapdsp"
2119 tscc_decoder_deps="zlib"
2120 txd_decoder_select="texturedsp"
2121 twinvq_decoder_select="mdct lsp sinewin"
2122 utvideo_decoder_select="bswapdsp"
2123 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2124 vble_decoder_select="huffyuvdsp"
2125 vc1_decoder_select="blockdsp error_resilience h263_decoder h264qpel intrax8 mpeg_er mpegvideo vc1dsp"
2126 vc1image_decoder_select="vc1_decoder"
2127 vorbis_decoder_select="mdct"
2128 vorbis_encoder_select="mdct"
2129 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2130 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2131 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2132 vp6a_decoder_select="vp6_decoder"
2133 vp6f_decoder_select="vp6_decoder"
2134 vp7_decoder_select="h264pred videodsp vp8dsp"
2135 vp8_decoder_select="h264pred videodsp vp8dsp"
2136 vp9_decoder_select="videodsp vp9_superframe_split_bsf"
2137 webp_decoder_select="vp8_decoder"
2138 wmapro_decoder_select="mdct sinewin wma_freqs"
2139 wmav1_decoder_select="mdct sinewin wma_freqs"
2140 wmav1_encoder_select="mdct sinewin wma_freqs"
2141 wmav2_decoder_select="mdct sinewin wma_freqs"
2142 wmav2_encoder_select="mdct sinewin wma_freqs"
2143 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2144 wmv1_decoder_select="h263_decoder"
2145 wmv1_encoder_select="h263_encoder"
2146 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2147 wmv2_encoder_select="h263_encoder wmv2dsp"
2148 wmv3_decoder_select="vc1_decoder"
2149 wmv3image_decoder_select="wmv3_decoder"
2150 zerocodec_decoder_deps="zlib"
2151 zlib_decoder_deps="zlib"
2152 zlib_encoder_deps="zlib"
2153 zmbv_decoder_deps="zlib"
2154 zmbv_encoder_deps="zlib"
2155
2156 # hardware accelerators
2157 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2158 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2159 dxva2_lib_deps="dxva2"
2160 vda_deps="VideoDecodeAcceleration_VDADecoder_h blocks_extension pthreads"
2161 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2162
2163 h263_vaapi_hwaccel_deps="vaapi"
2164 h263_vaapi_hwaccel_select="h263_decoder"
2165 h264_d3d11va_hwaccel_deps="d3d11va"
2166 h264_d3d11va_hwaccel_select="h264_decoder"
2167 h264_dxva2_hwaccel_deps="dxva2"
2168 h264_dxva2_hwaccel_select="h264_decoder"
2169 h264_mmal_hwaccel_deps="mmal"
2170 h264_qsv_hwaccel_deps="libmfx"
2171 h264_vaapi_hwaccel_deps="vaapi"
2172 h264_vaapi_hwaccel_select="h264_decoder"
2173 h264_vda_hwaccel_deps="vda"
2174 h264_vda_hwaccel_select="h264_decoder"
2175 h264_vda_old_hwaccel_deps="vda"
2176 h264_vda_old_hwaccel_select="h264_decoder"
2177 h264_vdpau_hwaccel_deps="vdpau"
2178 h264_vdpau_hwaccel_select="h264_decoder"
2179 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2180 hevc_d3d11va_hwaccel_select="hevc_decoder"
2181 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2182 hevc_dxva2_hwaccel_select="hevc_decoder"
2183 hevc_qsv_hwaccel_deps="libmfx"
2184 hevc_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferHEVC"
2185 hevc_vaapi_hwaccel_select="hevc_decoder"
2186 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2187 hevc_vdpau_hwaccel_select="hevc_decoder"
2188 mpeg1_vdpau_hwaccel_deps="vdpau"
2189 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2190 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2191 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2192 mpeg2_dxva2_hwaccel_deps="dxva2"
2193 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2194 mpeg2_mmal_hwaccel_deps="mmal"
2195 mpeg2_qsv_hwaccel_deps="libmfx"
2196 mpeg2_vaapi_hwaccel_deps="vaapi"
2197 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2198 mpeg2_vdpau_hwaccel_deps="vdpau"
2199 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2200 mpeg4_vaapi_hwaccel_deps="vaapi"
2201 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2202 mpeg4_vdpau_hwaccel_deps="vdpau"
2203 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2204 vc1_d3d11va_hwaccel_deps="d3d11va"
2205 vc1_d3d11va_hwaccel_select="vc1_decoder"
2206 vc1_dxva2_hwaccel_deps="dxva2"
2207 vc1_dxva2_hwaccel_select="vc1_decoder"
2208 vc1_mmal_hwaccel_deps="mmal"
2209 vc1_qsv_hwaccel_deps="libmfx"
2210 vc1_vaapi_hwaccel_deps="vaapi"
2211 vc1_vaapi_hwaccel_select="vc1_decoder"
2212 vc1_vdpau_hwaccel_deps="vdpau"
2213 vc1_vdpau_hwaccel_select="vc1_decoder"
2214 vp8_qsv_hwaccel_deps="libmfx"
2215 vp8_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferVP8"
2216 vp8_vaapi_hwaccel_select="vp8_decoder"
2217 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2218 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2219 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2220 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2221
2222 # hardware-accelerated codecs
2223 nvenc_deps_any="dlopen LoadLibrary"
2224 nvenc_extralibs='$ldl'
2225 omx_deps="dlopen pthreads"
2226 omx_extralibs='$ldl'
2227 omx_rpi_select="omx"
2228 qsvdec_select="qsv"
2229 qsvenc_select="qsv"
2230 vaapi_encode_deps="vaapi"
2231
2232 hwupload_cuda_filter_deps="cuda"
2233 scale_npp_filter_deps="cuda libnpp"
2234
2235 h264_mmal_decoder_deps="mmal"
2236 h264_nvenc_encoder_deps="nvenc"
2237 h264_omx_encoder_deps="omx"
2238 h264_qsv_decoder_deps="libmfx"
2239 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
2240 h264_qsv_encoder_deps="libmfx"
2241 h264_qsv_encoder_select="qsvenc"
2242 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
2243 h264_vaapi_encoder_select="vaapi_encode golomb"
2244 hevc_nvenc_encoder_deps="nvenc"
2245 hevc_qsv_decoder_deps="libmfx"
2246 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser hevc_qsv_hwaccel qsvdec"
2247 hevc_qsv_encoder_deps="libmfx"
2248 hevc_qsv_encoder_select="hevc_ps qsvenc"
2249 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
2250 hevc_vaapi_encoder_select="vaapi_encode golomb"
2251 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
2252 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
2253 mpeg2_mmal_decoder_deps="mmal"
2254 mpeg2_qsv_decoder_deps="libmfx"
2255 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2256 mpeg2_qsv_encoder_deps="libmfx"
2257 mpeg2_qsv_encoder_select="qsvenc"
2258 mpeg2_vaapi_encoder_deps="VAEncPictureParameterBufferMPEG2"
2259 mpeg2_vaapi_encoder_select="vaapi_encode"
2260 mpeg4_omx_encoder_deps="omx"
2261 vc1_mmal_decoder_deps="mmal"
2262 vc1_qsv_decoder_deps="libmfx"
2263 vc1_qsv_decoder_select="qsvdec vc1_qsv_hwaccel vc1_parser"
2264 vp8_qsv_decoder_deps="libmfx"
2265 vp8_qsv_decoder_select="qsvdec vp8_qsv_hwaccel vp8_parser"
2266 vp8_vaapi_encoder_deps="VAEncPictureParameterBufferVP8"
2267 vp8_vaapi_encoder_select="vaapi_encode"
2268
2269 nvenc_h264_encoder_select="h264_nvenc_encoder"
2270 nvenc_hevc_encoder_select="hevc_nvenc_encoder"
2271
2272 # parsers
2273 h264_parser_select="golomb h264dsp h264parse"
2274 hevc_parser_select="hevc_ps"
2275 mpegaudio_parser_select="mpegaudioheader"
2276 mpegvideo_parser_select="mpegvideo"
2277 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2278 vc1_parser_select="vc1dsp"
2279
2280 # bitstream_filters
2281 mjpeg2jpeg_bsf_select="jpegtables"
2282
2283 # external libraries
2284 avisynth_deps="LoadLibrary"
2285 avxsynth_deps="dlopen"
2286 avisynth_demuxer_deps_any="avisynth avxsynth"
2287 avisynth_demuxer_select="riffdec"
2288 libdcadec_decoder_deps="libdcadec"
2289 libfaac_encoder_deps="libfaac"
2290 libfaac_encoder_select="audio_frame_queue"
2291 libfdk_aac_decoder_deps="libfdk_aac"
2292 libfdk_aac_encoder_deps="libfdk_aac"
2293 libfdk_aac_encoder_select="audio_frame_queue"
2294 libgsm_decoder_deps="libgsm"
2295 libgsm_encoder_deps="libgsm"
2296 libgsm_ms_decoder_deps="libgsm"
2297 libgsm_ms_encoder_deps="libgsm"
2298 libilbc_decoder_deps="libilbc"
2299 libilbc_encoder_deps="libilbc"
2300 libkvazaar_encoder_deps="libkvazaar"
2301 libmp3lame_encoder_deps="libmp3lame"
2302 libmp3lame_encoder_select="audio_frame_queue mpegaudioheader"
2303 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2304 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2305 libopencore_amrnb_encoder_select="audio_frame_queue"
2306 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2307 libopenh264_decoder_deps="libopenh264"
2308 libopenh264_decoder_select="h264_mp4toannexb_bsf"
2309 libopenh264_encoder_deps="libopenh264"
2310 libopenjpeg_decoder_deps="libopenjpeg"
2311 libopenjpeg_encoder_deps="libopenjpeg"
2312 libopus_decoder_deps="libopus"
2313 libopus_encoder_deps="libopus"
2314 libopus_encoder_select="audio_frame_queue"
2315 libschroedinger_decoder_deps="libschroedinger"
2316 libschroedinger_encoder_deps="libschroedinger"
2317 libspeex_decoder_deps="libspeex"
2318 libspeex_encoder_deps="libspeex"
2319 libspeex_encoder_select="audio_frame_queue"
2320 libtheora_encoder_deps="libtheora"
2321 libtwolame_encoder_deps="libtwolame"
2322 libvo_aacenc_encoder_deps="libvo_aacenc"
2323 libvo_aacenc_encoder_select="audio_frame_queue"
2324 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2325 libvorbis_encoder_deps="libvorbis"
2326 libvorbis_encoder_select="audio_frame_queue"
2327 libvpx_vp8_decoder_deps="libvpx"
2328 libvpx_vp8_encoder_deps="libvpx"
2329 libvpx_vp9_decoder_deps="libvpx"
2330 libvpx_vp9_encoder_deps="libvpx"
2331 libwavpack_encoder_deps="libwavpack"
2332 libwavpack_encoder_select="audio_frame_queue"
2333 libwebp_encoder_deps="libwebp"
2334 libx262_encoder_deps="libx262"
2335 libx264_encoder_deps="libx264"
2336 libx265_encoder_deps="libx265"
2337 libxavs_encoder_deps="libxavs"
2338 libxvid_encoder_deps="libxvid mkstemp"
2339
2340 # demuxers / muxers
2341 ac3_demuxer_select="ac3_parser"
2342 asf_demuxer_select="riffdec"
2343 asf_muxer_select="riffenc"
2344 asf_stream_muxer_select="asf_muxer"
2345 avi_demuxer_select="iso_media riffdec"
2346 avi_muxer_select="riffenc"
2347 caf_demuxer_select="iso_media riffdec"
2348 dash_muxer_select="mp4_muxer"
2349 dirac_demuxer_select="dirac_parser"
2350 dv_demuxer_select="dvprofile"
2351 dv_muxer_select="dvprofile"
2352 dxa_demuxer_select="riffdec"
2353 eac3_demuxer_select="ac3_parser"
2354 f4v_muxer_select="mov_muxer"
2355 flac_demuxer_select="flac_parser"
2356 hds_muxer_select="flv_muxer"
2357 hls_muxer_select="mpegts_muxer"
2358 ipod_muxer_select="mov_muxer"
2359 ismv_muxer_select="mov_muxer"
2360 matroska_audio_muxer_select="matroska_muxer"
2361 matroska_demuxer_select="iso_media riffdec"
2362 matroska_demuxer_suggest="bzlib lzo zlib"
2363 matroska_muxer_select="iso_media riffenc"
2364 mmf_muxer_select="riffenc"
2365 mov_demuxer_select="iso_media riffdec"
2366 mov_demuxer_suggest="zlib"
2367 mov_muxer_select="iso_media riffenc rtpenc_chain"
2368 mp3_demuxer_select="mpegaudio_parser"
2369 mp3_muxer_select="mpegaudioheader"
2370 mp4_muxer_select="mov_muxer"
2371 mpegts_demuxer_select="iso_media"
2372 mpegts_muxer_select="adts_muxer latm_muxer"
2373 mpegtsraw_demuxer_select="mpegts_demuxer"
2374 mxf_d10_muxer_select="mxf_muxer"
2375 nut_muxer_select="riffenc"
2376 nuv_demuxer_select="riffdec"
2377 oga_muxer_select="ogg_muxer"
2378 ogg_demuxer_select="dirac_parse"
2379 opus_muxer_select="ogg_muxer"
2380 psp_muxer_select="mov_muxer"
2381 rtp_demuxer_select="sdp_demuxer"
2382 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2383 rtsp_demuxer_select="http_protocol rtpdec"
2384 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2385 sap_demuxer_select="sdp_demuxer"
2386 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2387 sdp_demuxer_select="rtpdec"
2388 smoothstreaming_muxer_select="ismv_muxer"
2389 spdif_muxer_select="aac_parser"
2390 spx_muxer_select="ogg_muxer"
2391 swf_demuxer_suggest="zlib"
2392 tak_demuxer_select="tak_parser"
2393 tg2_muxer_select="mov_muxer"
2394 tgp_muxer_select="mov_muxer"
2395 w64_demuxer_select="wav_demuxer"
2396 wav_demuxer_select="riffdec"
2397 wav_muxer_select="riffenc"
2398 webm_muxer_select="iso_media riffenc"
2399 wtv_demuxer_select="mpegts_demuxer riffdec"
2400 xmv_demuxer_select="riffdec"
2401 xwma_demuxer_select="riffdec"
2402
2403 # indevs / outdevs
2404 alsa_indev_deps="alsa"
2405 alsa_outdev_deps="alsa"
2406 avfoundation_indev_deps="AVFoundation_AVFoundation_h objc_arc pthreads"
2407 avfoundation_indev_extralibs="-framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia"
2408 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2409 dv1394_indev_deps="dv1394"
2410 dv1394_indev_select="dv_demuxer"
2411 fbdev_indev_deps="linux_fb_h"
2412 jack_indev_deps="jack"
2413 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
2414 libcdio_indev_deps="libcdio"
2415 libdc1394_indev_deps="libdc1394"
2416 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2417 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2418 pulse_indev_deps="libpulse"
2419 sndio_indev_deps="sndio"
2420 sndio_outdev_deps="sndio"
2421 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2422 vfwcap_indev_deps="vfw32 vfwcap_defines"
2423 xcbgrab_indev_deps="libxcb"
2424 xcbgrab_indev_suggest="libxcb_shm libxcb_xfixes"
2425
2426 # protocols
2427 ffrtmpcrypt_protocol_conflict="librtmp_protocol"
2428 ffrtmpcrypt_protocol_deps_any="gmp openssl"
2429 ffrtmpcrypt_protocol_select="tcp_protocol"
2430 ffrtmphttp_protocol_conflict="librtmp_protocol"
2431 ffrtmphttp_protocol_select="http_protocol"
2432 gopher_protocol_select="network"
2433 http_protocol_select="tcp_protocol"
2434 httpproxy_protocol_select="tcp_protocol"
2435 https_protocol_select="tls_protocol"
2436 icecast_protocol_select="http_protocol"
2437 librtmp_protocol_deps="librtmp"
2438 librtmpe_protocol_deps="librtmp"
2439 librtmps_protocol_deps="librtmp"
2440 librtmpt_protocol_deps="librtmp"
2441 librtmpte_protocol_deps="librtmp"
2442 mmsh_protocol_select="http_protocol"
2443 mmst_protocol_select="network"
2444 rtmp_protocol_conflict="librtmp_protocol"
2445 rtmp_protocol_select="tcp_protocol"
2446 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2447 rtmps_protocol_conflict="librtmp_protocol"
2448 rtmps_protocol_select="tls_protocol"
2449 rtmpt_protocol_select="ffrtmphttp_protocol"
2450 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2451 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2452 rtp_protocol_select="udp_protocol"
2453 sctp_protocol_deps="struct_sctp_event_subscribe"
2454 sctp_protocol_select="network"
2455 srtp_protocol_select="rtp_protocol srtp"
2456 tcp_protocol_select="network"
2457 tls_gnutls_protocol_deps="gnutls"
2458 tls_gnutls_protocol_select="tcp_protocol"
2459 tls_openssl_protocol_conflict="tls_gnutls_protocol"
2460 tls_openssl_protocol_deps="openssl"
2461 tls_openssl_protocol_select="tcp_protocol"
2462 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2463 udp_protocol_select="network"
2464 unix_protocol_deps="sys_un_h"
2465 unix_protocol_select="network"
2466
2467 # filters
2468 asyncts_filter_deps="avresample"
2469 blackframe_filter_deps="gpl"
2470 boxblur_filter_deps="gpl"
2471 bs2b_filter_deps="libbs2b"
2472 cropdetect_filter_deps="gpl"
2473 deinterlace_qsv_filter_deps="libmfx"
2474 deinterlace_vaapi_filter_deps="vaapi"
2475 delogo_filter_deps="gpl"
2476 drawtext_filter_deps="libfreetype"
2477 drawtext_filter_suggest="libfontconfig"
2478 frei0r_filter_deps="frei0r dlopen"
2479 frei0r_filter_extralibs='$ldl'
2480 frei0r_src_filter_deps="frei0r dlopen"
2481 frei0r_src_filter_extralibs='$ldl'
2482 hdcd_filter_deps="libhdcd"
2483 hqdn3d_filter_deps="gpl"
2484 interlace_filter_deps="gpl"
2485 movie_filter_deps="avcodec avformat"
2486 ocv_filter_deps="libopencv"
2487 resample_filter_deps="avresample"
2488 scale_filter_deps="swscale"
2489 scale_qsv_filter_deps="libmfx"
2490 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2491
2492 # examples
2493 decode_audio_example_deps="avcodec avutil"
2494 decode_video_example_deps="avcodec avutil"
2495 encode_audio_example_deps="avcodec avutil"
2496 encode_video_example_deps="avcodec avutil"
2497 filter_audio_example_deps="avfilter avutil"
2498 metadata_example_deps="avformat avutil"
2499 output_example_deps="avcodec avformat avresample avutil swscale"
2500 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder"
2501 transcode_aac_example_deps="avcodec avformat avresample"
2502
2503 # libraries, in linking order
2504 avcodec_deps="avutil"
2505 avcodec_select="null_bsf"
2506 avdevice_deps="avformat avcodec avutil"
2507 avfilter_deps="avutil"
2508 avformat_deps="avcodec avutil"
2509 avformat_suggest="network"
2510 avresample_deps="avutil"
2511 swscale_deps="avutil"
2512
2513 # programs
2514 avconv_deps="avcodec avfilter avformat avresample swscale"
2515 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2516                fps_filter null_filter resample_filter scale_filter
2517                trim_filter"
2518 avplay_deps="avcodec avfilter avformat avresample sdl"
2519 avplay_extralibs='$sdl_extralibs'
2520 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2521 avprobe_deps="avcodec avformat"
2522
2523 # documentation
2524 pod2man_deps="doc"
2525 texi2html_deps="doc"
2526
2527 # default parameters
2528
2529 logfile="avbuild/config.log"
2530
2531 # installation paths
2532 prefix_default="/usr/local"
2533 bindir_default='${prefix}/bin'
2534 datadir_default='${prefix}/share/avconv'
2535 docdir_default='${prefix}/share/doc/libav'
2536 incdir_default='${prefix}/include'
2537 libdir_default='${prefix}/lib'
2538 mandir_default='${prefix}/share/man'
2539 shlibdir_default="$libdir_default"
2540
2541 # toolchain
2542 ar_default="ar"
2543 cc_default="gcc"
2544 host_cc_default="gcc"
2545 ln_s="ln -s -f"
2546 nm_default="nm -g"
2547 objformat="elf"
2548 pkg_config_default=pkg-config
2549 ranlib="ranlib"
2550 strip="strip"
2551 version_script='--version-script'
2552 yasmexe="yasm"
2553
2554 # machine
2555 arch_default=$(uname -m)
2556 cpu="generic"
2557 intrinsics="none"
2558
2559 # OS
2560 target_os_default=$(tolower $(uname -s))
2561 host_os=$target_os_default
2562
2563 # configurable options
2564 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2565
2566 enable asm
2567 enable debug
2568 enable doc
2569 enable faan faandct faanidct
2570 enable optimizations
2571 enable safe_bitstream_reader
2572 enable static
2573 enable swscale_alpha
2574 enable valgrind_backtrace
2575
2576 # By default, enable only those hwaccels that have no external dependencies.
2577 enable d3d11va dxva2 vda vdpau
2578
2579 # build settings
2580 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2581 LIBPREF="lib"
2582 LIBSUF=".a"
2583 LIBNAME='$(LIBPREF)$(NAME)$(LIBSUF)'
2584 SLIBPREF="lib"
2585 SLIBSUF=".so"
2586 SLIBNAME='$(SLIBPREF)$(NAME)$(SLIBSUF)'
2587 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2588 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2589 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2590 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2591 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2592 VERSION_SCRIPT_POSTPROCESS_CMD="cat"
2593
2594 asflags_filter=echo
2595 cflags_filter=echo
2596 ldflags_filter=echo
2597
2598 AS_C='-c'
2599 AS_O='-o $@'
2600 CC_C='-c'
2601 CC_E='-E -o $@'
2602 CC_O='-o $@'
2603 OBJCC_C='-c'
2604 OBJCC_E='-E -o $@'
2605 OBJCC_O='-o $@'
2606 LD_O='-o $@'
2607 LD_LIB='-l%'
2608 LD_PATH='-L'
2609 HOSTCC_C='-c'
2610 HOSTCC_E='-E -o $@'
2611 HOSTCC_O='-o $@'
2612 HOSTLD_O='-o $@'
2613
2614 host_extralibs='-lm'
2615 host_cflags_filter=echo
2616 host_ldflags_filter=echo
2617
2618 target_path='$(CURDIR)'
2619
2620 # since the object filename is not given with the -MM flag, the compiler
2621 # is only able to print the basename, and we must add the path ourselves
2622 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2623 DEPFLAGS='-MM'
2624
2625 # find source path
2626 if test -f configure; then
2627     source_path=.
2628 else
2629     source_path=$(cd $(dirname "$0"); pwd)
2630     echo "$source_path" | grep -q '[[:blank:]]' &&
2631         die "Out of tree builds are impossible with whitespace in source path."
2632     test -e "$source_path/config.h" &&
2633         die "Out of tree builds are impossible with config.h in source dir."
2634 fi
2635
2636 for v in "$@"; do
2637     r=${v#*=}
2638     l=${v%"$r"}
2639     r=$(sh_quote "$r")
2640     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2641 done
2642
2643 find_things(){
2644     thing=$1
2645     pattern=$2
2646     file=$source_path/$3
2647     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2648 }
2649
2650 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2651 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2652 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2653 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2654 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2655 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2656 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2657 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2658 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2659
2660 find_things_extern(){
2661     thing=$1
2662     pattern=$2
2663     file=$source_path/$3
2664     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2665 }
2666
2667 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2668 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2669
2670 ALL_COMPONENTS="
2671     $BSF_LIST
2672     $DECODER_LIST
2673     $DEMUXER_LIST
2674     $ENCODER_LIST
2675     $FILTER_LIST
2676     $HWACCEL_LIST
2677     $INDEV_LIST
2678     $MUXER_LIST
2679     $OUTDEV_LIST
2680     $PARSER_LIST
2681     $PROTOCOL_LIST
2682 "
2683
2684 for n in $COMPONENT_LIST; do
2685     v=$(toupper ${n%s})_LIST
2686     eval enable \$$v
2687     eval ${n}_if_any="\$$v"
2688 done
2689
2690 enable $ARCH_EXT_LIST
2691
2692 die_unknown(){
2693     echo "Unknown option \"$1\"."
2694     echo "See $0 --help for available options."
2695     exit 1
2696 }
2697
2698 print_3_columns() {
2699     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2700 }
2701
2702 show_list() {
2703     suffix=_$1
2704     shift
2705     echo $* | sed s/$suffix//g | print_3_columns
2706     exit 0
2707 }
2708
2709 rand_list(){
2710     IFS=', '
2711     set -- $*
2712     unset IFS
2713     for thing; do
2714         comp=${thing%:*}
2715         prob=${thing#$comp}
2716         prob=${prob#:}
2717         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2718         echo "prob ${prob:-0.5}"
2719         printf '%s\n' $comp
2720     done
2721 }
2722
2723 do_random(){
2724     action=$1
2725     shift
2726     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2727     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2728 }
2729
2730 for opt do
2731     optval="${opt#*=}"
2732     case "$opt" in
2733         --extra-ldflags=*)
2734             add_ldflags $optval
2735         ;;
2736         --extra-ldexeflags=*)
2737             add_ldexeflags $optval
2738         ;;
2739         --extra-libs=*)
2740             add_extralibs $optval
2741         ;;
2742         --disable-devices)
2743             disable $INDEV_LIST $OUTDEV_LIST
2744         ;;
2745         --enable-debug=*)
2746             debuglevel="$optval"
2747         ;;
2748         --disable-programs)
2749             disable $PROGRAM_LIST
2750         ;;
2751         --disable-everything)
2752             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2753         ;;
2754         --disable-all)
2755             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2756             disable $LIBRARY_LIST $PROGRAM_LIST doc
2757         ;;
2758         --enable-random|--disable-random)
2759             action=${opt%%-random}
2760             do_random ${action#--} $COMPONENT_LIST
2761         ;;
2762         --enable-random=*|--disable-random=*)
2763             action=${opt%%-random=*}
2764             do_random ${action#--} $optval
2765         ;;
2766         --enable-*=*|--disable-*=*)
2767             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2768             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2769             eval list=\$$(toupper $thing)_LIST
2770             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2771             $action $(filter "$name" $list)
2772         ;;
2773         --enable-avserver|--disable-avserver*)
2774             warn "avserver has been removed, the ${opt} option is only"\
2775                  "provided for compatibility and will be removed in the future"
2776         ;;
2777         --enable-?*|--disable-?*)
2778             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2779             if is_in $option $COMPONENT_LIST; then
2780                 test $action = disable && action=unset
2781                 eval $action \$$(toupper ${option%s})_LIST
2782             elif is_in $option $CMDLINE_SELECT; then
2783                 $action $option
2784             else
2785                 die_unknown $opt
2786             fi
2787         ;;
2788         --list-*)
2789             NAME="${opt#--list-}"
2790             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2791             NAME=${NAME%s}
2792             eval show_list $NAME \$$(toupper $NAME)_LIST
2793         ;;
2794         --help|-h) show_help
2795         ;;
2796         --quiet|-q) quiet=yes
2797         ;;
2798         *)
2799             optname="${opt%%=*}"
2800             optname="${optname#--}"
2801             optname=$(echo "$optname" | sed 's/-/_/g')
2802             if is_in $optname $CMDLINE_SET; then
2803                 eval $optname='$optval'
2804             elif is_in $optname $CMDLINE_APPEND; then
2805                 append $optname "$optval"
2806             else
2807                 die_unknown $opt
2808             fi
2809         ;;
2810     esac
2811 done
2812
2813 for e in $env; do
2814     eval "export $e"
2815 done
2816
2817 disabled logging && logfile=/dev/null
2818
2819 # Die early if licensing-related configure options are incompatible.
2820 die_license_disabled() {
2821     enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
2822 }
2823
2824 map "die_license_disabled gpl"      $EXTERNAL_LIBRARY_GPL_LIST
2825 map "die_license_disabled nonfree"  $EXTERNAL_LIBRARY_NONFREE_LIST $HWACCEL_LIBRARY_NONFREE_LIST
2826 map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST
2827
2828 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
2829
2830 # Disable all the library-specific components if the library itself
2831 # is disabled, see AVCODEC_LIST and following _LIST variables.
2832
2833 disable_components(){
2834     disabled ${1} && disable $(
2835         eval components="\$$(toupper ${1})_COMPONENTS"
2836         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2837     )
2838 }
2839
2840 map 'disable_components $v' $LIBRARY_LIST
2841
2842 mkdir -p avbuild
2843 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2844 set >> $logfile
2845
2846 case "$toolchain" in
2847     *-asan)
2848         cc_default="${toolchain%-asan}"
2849         add_cflags  -fsanitize=address
2850         add_ldflags -fsanitize=address
2851     ;;
2852     *-msan)
2853         cc_default="${toolchain%-msan}"
2854         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2855         add_ldflags -fsanitize=memory
2856     ;;
2857     *-tsan)
2858         cc_default="${toolchain%-tsan}"
2859         add_cflags  -fsanitize=thread -fPIE
2860         add_ldflags -fsanitize=thread -pie
2861         case "$toolchain" in
2862             gcc-tsan)
2863                 add_cflags  -fPIC
2864                 add_ldflags -fPIC
2865                 ;;
2866         esac
2867     ;;
2868     *-usan)
2869         cc_default="${toolchain%-usan}"
2870         add_cflags  -fsanitize=undefined
2871         add_ldflags -fsanitize=undefined
2872         case "$toolchain" in
2873             clang-usan)
2874                 add_cflags -O1
2875                 ;;
2876         esac
2877     ;;
2878     valgrind-*)
2879         target_exec_default="valgrind"
2880         case "$toolchain" in
2881             valgrind-massif)
2882                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2883                 ;;
2884             valgrind-memcheck)
2885                 target_exec_args="--track-origins=yes --leak-check=full"
2886                 ;;
2887         esac
2888     ;;
2889     msvc)
2890         # Check whether the current MSVC version needs the C99 converter.
2891         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2892         # support enough of C99 to build libav. Default to the new
2893         # behaviour if the regexp was unable to match anything, since this
2894         # successfully parses the version number of existing supported
2895         # versions that require the converter (MSVC 2010 and 2012).
2896         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2897         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2898             cc_default="cl"
2899         else
2900             cc_default="c99wrap cl"
2901         fi
2902         ld_default="$source_path/compat/windows/mslink"
2903         nm_default="dumpbin -symbols"
2904         ar_default="lib"
2905         case "$arch" in
2906         arm*)
2907             as_default="armasm"
2908             ;;
2909         esac
2910         target_os_default="win32"
2911         # Use a relative path for TMPDIR. This makes sure all the
2912         # ffconf temp files are written with a relative path, avoiding
2913         # issues with msys/win32 path conversion for MSVC parameters
2914         # such as -Fo<file> or -out:<file>.
2915         TMPDIR=.
2916     ;;
2917     icl)
2918         cc_default="icl"
2919         ld_default="xilink"
2920         nm_default="dumpbin -symbols"
2921         ar_default="xilib"
2922         target_os_default="win32"
2923         TMPDIR=.
2924     ;;
2925     gcov)
2926         add_cflags  -fprofile-arcs -ftest-coverage
2927         add_ldflags -fprofile-arcs -ftest-coverage
2928     ;;
2929     llvm-cov)
2930         add_cflags -fprofile-arcs -ftest-coverage
2931         add_ldflags --coverage
2932     ;;
2933     hardened)
2934         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2935         add_cflags   -fno-strict-overflow -fstack-protector-all
2936         add_ldflags  -Wl,-z,relro -Wl,-z,now
2937     ;;
2938     ?*)
2939         die "Unknown toolchain $toolchain"
2940     ;;
2941 esac
2942
2943 test -n "$cross_prefix" && enable cross_compile
2944
2945 if enabled cross_compile; then
2946     test -n "$arch" && test -n "$target_os" ||
2947         die "Must specify target arch (--arch) and OS (--target-os) when cross-compiling"
2948 fi
2949
2950 ar_default="${cross_prefix}${ar_default}"
2951 cc_default="${cross_prefix}${cc_default}"
2952 occ_default="${cross_prefix}${occ_default}"
2953 nm_default="${cross_prefix}${nm_default}"
2954 pkg_config_default="${cross_prefix}${pkg_config_default}"
2955 ranlib="${cross_prefix}${ranlib}"
2956 strip="${cross_prefix}${strip}"
2957
2958 sysinclude_default="${sysroot}/usr/include"
2959
2960 set_default arch cc pkg_config sysinclude target_exec target_os
2961 enabled cross_compile || host_cc_default=$cc
2962 set_default host_cc
2963
2964 if ! $pkg_config --version >/dev/null 2>&1; then
2965     warn "$pkg_config not found, library detection may fail."
2966     pkg_config=false
2967 fi
2968
2969 exesuf() {
2970     case $1 in
2971         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2972     esac
2973 }
2974
2975 EXESUF=$(exesuf $target_os)
2976 HOSTEXESUF=$(exesuf $host_os)
2977
2978 # set temporary file name
2979 : ${TMPDIR:=$TEMPDIR}
2980 : ${TMPDIR:=$TMP}
2981 : ${TMPDIR:=/tmp}
2982
2983 if ! check_cmd mktemp -u XXXXXX; then
2984     # simple replacement for missing mktemp
2985     # NOT SAFE FOR GENERAL USE
2986     mktemp(){
2987         tmpname="${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2988         echo "$tmpname"
2989         mkdir "$tmpname"
2990     }
2991 fi
2992
2993 AVTMPDIR=$(mktemp -d "${TMPDIR}/avconf.XXXXXXXX" 2> /dev/null) ||
2994     die "Unable to create temporary directory in $TMPDIR."
2995
2996 tmpfile(){
2997     tmp="${AVTMPDIR}/test"$2
2998     (set -C; exec > $tmp) 2> /dev/null ||
2999         die "Unable to create temporary file in $AVTMPDIR."
3000     eval $1=$tmp
3001 }
3002
3003 trap 'rm -rf -- "$AVTMPDIR"' EXIT
3004 trap 'exit 2' INT
3005
3006 tmpfile TMPASM .asm
3007 tmpfile TMPC   .c
3008 tmpfile TMPE   $EXESUF
3009 tmpfile TMPH   .h
3010 tmpfile TMPO   .o
3011 tmpfile TMPS   .S
3012 tmpfile TMPSH  .sh
3013 tmpfile TMPV   .ver
3014
3015 unset -f mktemp
3016
3017 chmod +x $TMPE
3018
3019 # make sure we can execute files in $TMPDIR
3020 cat > $TMPSH 2>> $logfile <<EOF
3021 #! /bin/sh
3022 EOF
3023 chmod +x $TMPSH >> $logfile 2>&1
3024 if ! $TMPSH >> $logfile 2>&1; then
3025     cat <<EOF
3026 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
3027 variable to another directory and make sure that it is not mounted noexec.
3028 EOF
3029     die "Sanity test failed."
3030 fi
3031
3032 armasm_flags(){
3033     for flag; do
3034         case $flag in
3035             # Filter out MSVC cl.exe options from cflags that shouldn't
3036             # be passed to gas-preprocessor
3037             -M[TD]*)                                            ;;
3038             *)                  echo $flag                      ;;
3039         esac
3040    done
3041 }
3042
3043 ccc_flags(){
3044     for flag; do
3045         case $flag in
3046             -std=c99)           echo -c99                       ;;
3047             -mcpu=*)            echo -arch ${flag#*=}           ;;
3048             -mieee)             echo -ieee                      ;;
3049             -O*|-fast)          echo $flag                      ;;
3050             -fno-math-errno)    echo -assume nomath_errno       ;;
3051             -g)                 echo -g3                        ;;
3052             -Wall)              echo -msg_enable level2         ;;
3053             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
3054             -Wl,*)              echo $flag                      ;;
3055             -f*|-W*)                                            ;;
3056             *)                  echo $flag                      ;;
3057         esac
3058    done
3059 }
3060
3061 cparser_flags(){
3062     for flag; do
3063         case $flag in
3064             -Wno-switch)             echo -Wno-switch-enum ;;
3065             -Wno-format-zero-length) ;;
3066             -Wdisabled-optimization) ;;
3067             -Wno-pointer-sign)       echo -Wno-other ;;
3068             *)                       echo $flag ;;
3069         esac
3070     done
3071 }
3072
3073 msvc_common_flags(){
3074     for flag; do
3075         case $flag in
3076             # In addition to specifying certain flags under the compiler
3077             # specific filters, they must be specified here as well or else the
3078             # generic catch all at the bottom will print the original flag.
3079             -Wall)                ;;
3080             -Wextra)              ;;
3081             -std=c99)             ;;
3082             # Common flags
3083             -fomit-frame-pointer) ;;
3084             -g)                   echo -Z7 ;;
3085             -fno-math-errno)      ;;
3086             -fno-common)          ;;
3087             -fno-signed-zeros)    ;;
3088             -fPIC)                ;;
3089             -mthumb)              ;;
3090             -march=*)             ;;
3091             -lz)                  echo zlib.lib ;;
3092             -lx264)               echo libx264.lib ;;
3093             -l*)                  echo ${flag#-l}.lib ;;
3094             -L*)                  echo -libpath:${flag#-L} ;;
3095             *)                    echo $flag ;;
3096         esac
3097     done
3098 }
3099
3100 msvc_flags(){
3101     msvc_common_flags "$@"
3102     for flag; do
3103         case $flag in
3104             -Wall)                echo -W3 -wd4018 -wd4146 -wd4244 -wd4305     \
3105                                        -wd4554 ;;
3106             -Wextra)              echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3107                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3108                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3109                                        -wd4273 -wd4554 -wd4701 -wd4703 ;;
3110         esac
3111     done
3112 }
3113
3114 icl_flags(){
3115     msvc_common_flags "$@"
3116     for flag; do
3117         case $flag in
3118             # Despite what Intel's documentation says -Wall, which is supported
3119             # on Windows, does enable remarks so disable them here.
3120             -Wall)                echo $flag -Qdiag-disable:remark ;;
3121             -std=c99)             echo -Qstd=c99 ;;
3122         esac
3123     done
3124 }
3125
3126 pgi_flags(){
3127     for flag; do
3128         case $flag in
3129             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3130             -fomit-frame-pointer) echo -Mnoframe ;;
3131             -g)                   echo -gopt ;;
3132             *)                    echo $flag ;;
3133         esac
3134     done
3135 }
3136
3137 suncc_flags(){
3138     for flag; do
3139         case $flag in
3140             -march=*|-mcpu=*)
3141                 case "${flag#*=}" in
3142                     native)                   echo -xtarget=native       ;;
3143                     v9|niagara)               echo -xarch=sparc          ;;
3144                     ultrasparc)               echo -xarch=sparcvis       ;;
3145                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3146                     i586|pentium)             echo -xchip=pentium        ;;
3147                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3148                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3149                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3150                     pentium4*)          echo -xtarget=pentium4           ;;
3151                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3152                     *-sse3)             echo -xarch=sse3                 ;;
3153                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3154                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3155                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3156                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3157                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3158                     k8|opteron|athlon64|athlon-fx)
3159                                                echo -xarch=sse2a         ;;
3160                     athlon*)                   echo -xarch=pentium_proa  ;;
3161                 esac
3162                 ;;
3163             -std=c99)             echo -xc99              ;;
3164             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3165             -fPIC)                echo -KPIC -xcode=pic32 ;;
3166             -W*,*)                echo $flag              ;;
3167             -f*-*|-W*|-mimpure-text)                      ;;
3168             -shared)              echo -G                 ;;
3169             *)                    echo $flag              ;;
3170         esac
3171     done
3172 }
3173
3174 tms470_flags(){
3175     for flag; do
3176         case $flag in
3177             -march=*|-mcpu=*)
3178                 case "${flag#*=}" in
3179                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3180                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3181                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3182                     armv6*|arm11*)          echo -mv=6   ;;
3183                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3184                                             echo -mv=5e  ;;
3185                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3186                 esac
3187                 ;;
3188             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3189             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3190             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3191             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3192             -msoft-float)   echo --float_support=vfplib       ;;
3193             -O[0-3]|-mf=*)  echo $flag                        ;;
3194             -g)             echo -g -mn                       ;;
3195             -pds=*)         echo $flag                        ;;
3196             -D*|-I*)        echo $flag                        ;;
3197             --gcc|--abi=*)  echo $flag                        ;;
3198             -me)            echo $flag                        ;;
3199         esac
3200     done
3201 }
3202
3203 probe_cc(){
3204     pfx=$1
3205     _cc=$2
3206
3207     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3208     unset _ld_o _ldflags _ld_lib _ld_path
3209     unset _depflags _DEPCMD _DEPFLAGS
3210     _flags_filter=echo
3211
3212     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3213         _type=llvm_gcc
3214         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3215         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3216         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3217         _cflags_speed='-O3'
3218         _cflags_size='-Os'
3219     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3220         _type=gcc
3221         gcc_version=$($_cc --version | head -n1)
3222         gcc_basever=$($_cc -dumpversion)
3223         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3224         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3225         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3226         if ! $_cc -dumpversion | grep -q '^2\.'; then
3227             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3228         fi
3229         _cflags_speed='-O3'
3230         _cflags_size='-Os'
3231     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3232         _type=icc
3233         _ident=$($_cc --version | head -n1)
3234         _depflags='-MMD'
3235         _cflags_speed='-O3'
3236         _cflags_size='-Os'
3237         _cflags_noopt='-O1'
3238     elif $_cc -v 2>&1 | grep -q xlc; then
3239         _type=xlc
3240         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3241         _cflags_speed='-O5'
3242         _cflags_size='-O5 -qcompact'
3243     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3244         _type=ccc
3245         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3246         _DEPFLAGS='-M'
3247         _cflags_speed='-fast'
3248         _cflags_size='-O1'
3249         _flags_filter=ccc_flags
3250     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3251         test -d "$sysroot" || die "No valid sysroot specified."
3252         _type=armcc
3253         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3254         armcc_conf="$PWD/armcc.conf"
3255         $_cc --arm_linux_configure                 \
3256              --arm_linux_config_file="$armcc_conf" \
3257              --configure_sysroot="$sysroot"        \
3258              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3259              die "Error creating armcc configuration file."
3260         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3261         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3262         as_default="${cross_prefix}gcc"
3263         _depflags='-MMD'
3264         _cflags_speed='-O3'
3265         _cflags_size='-Os'
3266     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3267         _type=tms470
3268         _ident=$($_cc -version | head -n1 | tr -s ' ')
3269         _flags='--gcc --abi=eabi -me'
3270         _cc_e='-ppl -fe=$@'
3271         _cc_o='-fe=$@'
3272         _depflags='-ppa -ppd=$(@:.o=.d)'
3273         _cflags_speed='-O3 -mf=5'
3274         _cflags_size='-O3 -mf=2'
3275         _flags_filter=tms470_flags
3276     elif $_cc -v 2>&1 | grep -q clang; then
3277         _type=clang
3278         _ident=$($_cc --version 2>/dev/null | head -n1)
3279         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3280         _cflags_speed='-O3'
3281         _cflags_size='-Os'
3282     elif $_cc -V 2>&1 | grep -q Sun; then
3283         _type=suncc
3284         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3285         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3286         _DEPFLAGS='-xM1 -xc99'
3287         _ldflags='-std=c99'
3288         _cflags_speed='-O5'
3289         _cflags_size='-O5 -xspace'
3290         _flags_filter=suncc_flags
3291     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3292         _type=pathscale
3293         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3294         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3295         _cflags_speed='-O2'
3296         _cflags_size='-Os'
3297         _flags_filter='filter_out -Wdisabled-optimization'
3298     elif $_cc -v 2>&1 | grep -q Open64; then
3299         _type=open64
3300         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3301         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3302         _cflags_speed='-O2'
3303         _cflags_size='-Os'
3304         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3305     elif $_cc -V 2>&1 | grep -q Portland; then
3306         _type=pgi
3307         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3308         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3309         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3310         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3311         _cflags_noopt="-O1"
3312         _flags_filter=pgi_flags
3313     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3314         _type=armasm
3315         _ident=$($_cc | head -n1)
3316         # 4509: "This form of conditional instruction is deprecated"
3317         _flags="-nologo -ignore 4509"
3318         _flags_filter=armasm_flags
3319     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3320         _type=msvc
3321         _ident=$($_cc 2>&1 | head -n1)
3322         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3323         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3324         _cflags_speed="-O2"
3325         _cflags_size="-O1"
3326         _cflags_noopt="-O1"
3327         if $_cc -nologo- 2>&1 | grep -q Linker; then
3328             _ld_o='-out:$@'
3329         else
3330             _ld_o='-Fe$@'
3331         fi
3332         _cc_o='-Fo$@'
3333         _cc_e='-P -Fi$@'
3334         _flags_filter=msvc_flags
3335         _ld_lib='lib%.a'
3336         _ld_path='-libpath:'
3337         _flags='-nologo'
3338     elif $_cc 2>&1 | grep -q Intel; then
3339         _type=icl
3340         _ident=$($_cc 2>&1 | head -n1)
3341         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3342         # Not only is O3 broken on 13.x+ but it is slower on all previous
3343         # versions (tested) as well.
3344         _cflags_speed="-O2"
3345         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3346         if $_cc 2>&1 | grep -q Linker; then
3347             _ld_o='-out:$@'
3348         else
3349             _ld_o='-Fe$@'
3350         fi
3351         _cc_o='-Fo$@'
3352         _cc_e='-P'
3353         _flags_filter=icl_flags
3354         _ld_lib='lib%.a'
3355         _ld_path='-libpath:'
3356         # -Qdiag-error to make icl error when seeing certain unknown arguments
3357         _flags='-nologo -Qdiag-error:4044,10157'
3358         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3359         # with MSVC which enables it by default.
3360         _cflags='-Qms0 -Qvec- -Qsimd- -GS'
3361     elif $_cc -? 2>/dev/null | grep -q 'LLVM.*Linker'; then
3362         # lld can emulate multiple different linkers; in ms link.exe mode,
3363         # the -? parameter gives the help output which contains an identifyable
3364         # string, while it gives an error in other modes.
3365         _type=lld-link
3366         # The link.exe mode doesn't have a switch for getting the version,
3367         # but we can force it back to gnu mode and get the version from there.
3368         _ident=$($_cc -flavor gnu --version 2>/dev/null)
3369         _ld_o='-out:$@'
3370         _flags_filter=msvc_flags
3371         _ld_lib='lib%.a'
3372         _ld_path='-libpath:'
3373     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3374         _type=cparser
3375         _ident=$($_cc --version | head -n1)
3376         _depflags='-MMD'
3377         _cflags_speed='-O4'
3378         _cflags_size='-O2'
3379         _flags_filter=cparser_flags
3380     fi
3381
3382     eval ${pfx}_type=\$_type
3383     eval ${pfx}_ident=\$_ident
3384 }
3385
3386 set_ccvars(){
3387     eval ${1}_C=\${_cc_c-\${${1}_C}}
3388     eval ${1}_E=\${_cc_e-\${${1}_E}}
3389     eval ${1}_O=\${_cc_o-\${${1}_O}}
3390
3391     if [ -n "$_depflags" ]; then
3392         eval ${1}_DEPFLAGS=\$_depflags
3393     else
3394         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3395         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3396         eval DEP${1}FLAGS=\$_flags
3397     fi
3398 }
3399
3400 probe_cc cc "$cc"
3401 cflags_filter=$_flags_filter
3402 cflags_speed=$_cflags_speed
3403 cflags_size=$_cflags_size
3404 cflags_noopt=$_cflags_noopt
3405 add_cflags $_flags $_cflags
3406 cc_ldflags=$_ldflags
3407 set_ccvars CC
3408
3409 probe_cc hostcc "$host_cc"
3410 host_cflags_filter=$_flags_filter
3411 host_cflags_speed=$_cflags_speed
3412 add_host_cflags  $_flags $_cflags
3413 set_ccvars HOSTCC
3414
3415 test -n "$cc_type" && enable $cc_type ||
3416     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3417
3418 : ${as_default:=$cc}
3419 : ${objcc_default:=$cc}
3420 : ${dep_cc_default:=$cc}
3421 : ${ld_default:=$cc}
3422 : ${host_ld_default:=$host_cc}
3423 set_default ar as objcc dep_cc ld host_ld
3424
3425 probe_cc as "$as"
3426 asflags_filter=$_flags_filter
3427 add_asflags $_flags $_cflags
3428 set_ccvars AS
3429
3430 probe_cc objcc "$objcc"
3431 objcflags_filter=$_flags_filter
3432 add_objcflags $_flags $_cflags
3433 set_ccvars OBJC
3434
3435 probe_cc ld "$ld"
3436 ldflags_filter=$_flags_filter
3437 add_ldflags $_flags $_ldflags
3438 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3439 LD_O=${_ld_o-$LD_O}
3440 LD_LIB=${_ld_lib-$LD_LIB}
3441 LD_PATH=${_ld_path-$LD_PATH}
3442
3443 probe_cc hostld "$host_ld"
3444 host_ldflags_filter=$_flags_filter
3445 add_host_ldflags $_flags $_ldflags
3446 HOSTLD_O=${_ld_o-$HOSTLD_O}
3447
3448 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3449     probe_cc depcc "$dep_cc"
3450     CCDEP=${_DEPCMD:-$DEPCMD}
3451     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3452     DEPCCFLAGS=$_flags
3453 fi
3454
3455 if $ar 2>&1 | grep -q Microsoft; then
3456     arflags="-nologo"
3457     ar_o='-out:$@'
3458 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3459     arflags="rq"
3460     ar_o='$@'
3461 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3462     arflags='-Xany -r -c'
3463     ar_o='$@'
3464 else
3465     arflags="rc"
3466     ar_o='$@'
3467 fi
3468
3469 add_cflags $extra_cflags
3470 add_objcflags $extra_objcflags
3471 add_asflags $extra_cflags
3472
3473 if test -n "$sysroot"; then
3474     case "$cc_type" in
3475         gcc|llvm_gcc|clang)
3476             add_cppflags --sysroot="$sysroot"
3477             add_ldflags --sysroot="$sysroot"
3478         ;;
3479         tms470)
3480             add_cppflags -I"$sysinclude"
3481             add_ldflags  --sysroot="$sysroot"
3482         ;;
3483     esac
3484 fi
3485
3486 if test "$cpu" = host; then
3487     enabled cross_compile &&
3488         die "--cpu=host makes no sense when cross-compiling."
3489
3490     case "$cc_type" in
3491         gcc|llvm_gcc)
3492             check_native(){
3493                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3494                 sed -n "/cc1.*$1=/{
3495                             s/.*$1=\\([^ ]*\\).*/\\1/
3496                             p
3497                             q
3498                         }" $TMPE
3499             }
3500             cpu=$(check_native -march || check_native -mcpu)
3501         ;;
3502     esac
3503
3504     test "${cpu:-host}" = host &&
3505         die "--cpu=host not supported with compiler $cc"
3506 fi
3507
3508 # Deal with common $arch aliases
3509 case "$arch" in
3510     aarch64|arm64)
3511         arch="aarch64"
3512     ;;
3513     arm*)
3514         arch="arm"
3515     ;;
3516     mips*|IP*)
3517         case "$arch" in
3518         *el)
3519             add_cppflags -EL
3520             add_ldflags -EL
3521         ;;
3522         *eb)
3523             add_cppflags -EB
3524             add_ldflags -EB
3525         ;;
3526         esac
3527         arch="mips"
3528     ;;
3529     parisc*|hppa*)
3530         arch="parisc"
3531     ;;
3532     "Power Macintosh"|ppc*|powerpc*)
3533         arch="ppc"
3534     ;;
3535     s390|s390x)
3536         arch="s390"
3537     ;;
3538     sh4|sh)
3539         arch="sh4"
3540     ;;
3541     sun4u|sparc*)
3542         arch="sparc"
3543     ;;
3544     tilegx|tile-gx)
3545         arch="tilegx"
3546     ;;
3547     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3548         arch="x86"
3549     ;;
3550 esac
3551
3552 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3553 enable $arch
3554
3555 # Add processor-specific flags
3556 if enabled aarch64; then
3557
3558     case $cpu in
3559         armv*)
3560             cpuflags="-march=$cpu"
3561         ;;
3562         *)
3563             cpuflags="-mcpu=$cpu"
3564         ;;
3565     esac
3566
3567 elif enabled alpha; then
3568
3569     cpuflags="-mcpu=$cpu"
3570
3571 elif enabled arm; then
3572
3573     check_arm_arch() {
3574         check_cpp_condition stddef.h \
3575             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3576             $cpuflags
3577     }
3578
3579     probe_arm_arch() {
3580         if   check_arm_arch 4;        then echo armv4
3581         elif check_arm_arch 4T;       then echo armv4t
3582         elif check_arm_arch 5;        then echo armv5
3583         elif check_arm_arch 5E;       then echo armv5e
3584         elif check_arm_arch 5T;       then echo armv5t
3585         elif check_arm_arch 5TE;      then echo armv5te
3586         elif check_arm_arch 5TEJ;     then echo armv5te
3587         elif check_arm_arch 6;        then echo armv6
3588         elif check_arm_arch 6J;       then echo armv6j
3589         elif check_arm_arch 6K;       then echo armv6k
3590         elif check_arm_arch 6Z;       then echo armv6z
3591         elif check_arm_arch 6ZK;      then echo armv6zk
3592         elif check_arm_arch 6T2;      then echo armv6t2
3593         elif check_arm_arch 7;        then echo armv7
3594         elif check_arm_arch 7A  7_A;  then echo armv7-a
3595         elif check_arm_arch 7S;       then echo armv7-a
3596         elif check_arm_arch 7R  7_R;  then echo armv7-r
3597         elif check_arm_arch 7M  7_M;  then echo armv7-m
3598         elif check_arm_arch 7EM 7E_M; then echo armv7-m
3599         elif check_arm_arch 8A  8_A;  then echo armv8-a
3600         fi
3601     }
3602
3603     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3604
3605     case $cpu in
3606         armv*)
3607             cpuflags="-march=$cpu"
3608             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3609         ;;
3610         *)
3611             cpuflags="-mcpu=$cpu"
3612             case $cpu in
3613                 cortex-a*)                               subarch=armv7a  ;;
3614                 cortex-r*)                               subarch=armv7r  ;;
3615                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3616                 arm11*)                                  subarch=armv6   ;;
3617                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3618                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3619                 *)                             subarch=$(probe_arm_arch) ;;
3620             esac
3621         ;;
3622     esac
3623
3624     case "$subarch" in
3625         armv5t*)    enable fast_clz                ;;
3626         armv[6-8]*) enable fast_clz fast_unaligned ;;
3627     esac
3628
3629 elif enabled avr32; then
3630
3631     case $cpu in
3632         ap7[02]0[0-2])
3633             subarch="avr32_ap"
3634             cpuflags="-mpart=$cpu"
3635         ;;
3636         ap)
3637             subarch="avr32_ap"
3638             cpuflags="-march=$cpu"
3639         ;;
3640         uc3[ab]*)
3641             subarch="avr32_uc"
3642             cpuflags="-mcpu=$cpu"
3643         ;;
3644         uc)
3645             subarch="avr32_uc"
3646             cpuflags="-march=$cpu"
3647         ;;
3648     esac
3649
3650 elif enabled bfin; then
3651
3652     cpuflags="-mcpu=$cpu"
3653
3654 elif enabled mips; then
3655
3656     cpuflags="-march=$cpu"
3657
3658 elif enabled ppc; then
3659
3660     disable ldbrx
3661
3662     case $(tolower $cpu) in
3663         601|ppc601|powerpc601)
3664             cpuflags="-mcpu=601"
3665             disable altivec
3666         ;;
3667         603*|ppc603*|powerpc603*)
3668             cpuflags="-mcpu=603"
3669             disable altivec
3670         ;;
3671         604*|ppc604*|powerpc604*)
3672             cpuflags="-mcpu=604"
3673             disable altivec
3674         ;;
3675         g3|75*|ppc75*|powerpc75*)
3676             cpuflags="-mcpu=750"
3677             disable altivec
3678         ;;
3679         g4|745*|ppc745*|powerpc745*)
3680             cpuflags="-mcpu=7450"
3681             disable vsx
3682         ;;
3683         74*|ppc74*|powerpc74*)
3684             cpuflags="-mcpu=7400"
3685             disable vsx
3686         ;;
3687         g5|970|ppc970|powerpc970)
3688             cpuflags="-mcpu=970"
3689             disable vsx
3690         ;;
3691         power[3-6]*)
3692             cpuflags="-mcpu=$cpu"
3693             disable vsx
3694         ;;
3695         power[7-8]*)
3696             cpuflags="-mcpu=$cpu"
3697             enable ldbrx
3698         ;;
3699         cell)
3700             cpuflags="-mcpu=cell"
3701             enable ldbrx
3702             disable vsx
3703         ;;
3704         e500mc)
3705             cpuflags="-mcpu=e500mc"
3706             disable altivec
3707         ;;
3708         e500v2)
3709             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3710             disable altivec
3711             disable dcbzl
3712         ;;
3713         e500)
3714             cpuflags="-mcpu=8540 -mhard-float"
3715             disable altivec
3716             disable dcbzl
3717         ;;
3718     esac
3719
3720 elif enabled sparc; then
3721
3722     case $cpu in
3723         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3724             cpuflags="-mcpu=$cpu"
3725         ;;
3726         ultrasparc*|niagara[234])
3727             cpuflags="-mcpu=$cpu"
3728         ;;
3729     esac
3730
3731 elif enabled x86; then
3732
3733     case $cpu in
3734         i[345]86|pentium)
3735             cpuflags="-march=$cpu"
3736             disable i686
3737             disable mmx
3738         ;;
3739         # targets that do NOT support nopl and conditional mov (cmov)
3740         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3741             cpuflags="-march=$cpu"
3742             disable i686
3743         ;;
3744         # targets that do support nopl and conditional mov (cmov)
3745         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3746             cpuflags="-march=$cpu"
3747             enable i686
3748             enable fast_cmov
3749         ;;
3750         # targets that do support conditional mov but on which it's slow
3751         pentium4|pentium4m|prescott|nocona)
3752             cpuflags="-march=$cpu"
3753             enable i686
3754             disable fast_cmov
3755         ;;
3756     esac
3757
3758 fi
3759
3760 if [ "$cpu" != generic ]; then
3761     add_cflags  $cpuflags
3762     add_asflags $cpuflags
3763     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3764 fi
3765
3766 # compiler sanity check
3767 check_exec <<EOF
3768 int main(void){ return 0; }
3769 EOF
3770 if test "$?" != 0; then
3771     echo "$cc is unable to create an executable file."
3772     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3773         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3774         echo "Only do this if you know what cross compiling means."
3775     fi
3776     die "C compiler test failed."
3777 fi
3778
3779 add_cppflags -D_ISOC99_SOURCE
3780
3781 # some compilers silently accept -std=c11, so we also need to check that the
3782 # version macro is defined properly
3783 check_cpp_condition stdlib.h  "__STDC_VERSION__ >= 201112L" -std=c11 &&
3784     add_cflags -std=c11 ||
3785     check_cflags -std=c99
3786
3787 check_cppflags -D_FILE_OFFSET_BITS=64
3788 check_cppflags -D_LARGEFILE_SOURCE
3789
3790 add_host_cppflags -D_ISOC99_SOURCE
3791 check_host_cflags -std=c99
3792 check_host_cflags -Wall
3793 check_host_cflags $host_cflags_speed
3794
3795 check_64bit(){
3796     arch32=$1
3797     arch64=$2
3798     expr=$3
3799     check_code cc "" "int test[2*($expr) - 1]" &&
3800         subarch=$arch64 || subarch=$arch32
3801 }
3802
3803 case "$arch" in
3804     aarch64|alpha|ia64)
3805         spic=$shared
3806     ;;
3807     mips)
3808         check_64bit mips mips64 '_MIPS_SIM > 1'
3809         spic=$shared
3810     ;;
3811     parisc)
3812         check_64bit parisc parisc64 'sizeof(void *) > 4'
3813         spic=$shared
3814     ;;
3815     ppc)
3816         check_64bit ppc ppc64 'sizeof(void *) > 4'
3817         spic=$shared
3818     ;;
3819     s390)
3820         check_64bit s390 s390x 'sizeof(void *) > 4'
3821         spic=$shared
3822     ;;
3823     sparc)
3824         check_64bit sparc sparc64 'sizeof(void *) > 4'
3825         spic=$shared
3826     ;;
3827     x86)
3828         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3829         if test "$subarch" = "x86_64"; then
3830             spic=$shared
3831         fi
3832     ;;
3833 esac
3834
3835 enable $subarch
3836 enabled spic && enable_weak pic
3837
3838 # OS specific
3839 case $target_os in
3840     aix)
3841         SHFLAGS=-shared
3842         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3843         enabled shared && add_ldflags -Wl,-brtl
3844         ;;
3845     android)
3846         disable symver
3847         enable section_data_rel_ro
3848         SLIB_INSTALL_NAME='$(SLIBNAME)'
3849         SLIB_INSTALL_LINKS=
3850         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3851         ;;
3852     haiku)
3853         prefix_default="/boot/common"
3854         network_extralibs="-lnetwork"
3855         host_extralibs=
3856         ;;
3857     sunos)
3858         SHFLAGS='-shared -Wl,-h,$$(@F)'
3859         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3860         network_extralibs="-lsocket -lnsl"
3861         # When using suncc to build, the Solaris linker will mark
3862         # an executable with each instruction set encountered by
3863         # the Solaris assembler.  As our libraries contain their own
3864         # guards for processor-specific code, instead suppress
3865         # generation of the HWCAPS ELF section on Solaris x86 only.
3866         enabled_all suncc x86 &&
3867             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3868             add_ldflags -Wl,-M,mapfile
3869         nm_default='nm -P -g'
3870         version_script='-M'
3871         VERSION_SCRIPT_POSTPROCESS_CMD='perl $(SRC_PATH)/compat/solaris/make_sunver.pl - $(OBJS)'
3872         ;;
3873     netbsd)
3874         disable symver
3875         oss_indev_extralibs="-lossaudio"
3876         oss_outdev_extralibs="-lossaudio"
3877         ;;
3878     openbsd|bitrig)
3879         disable symver
3880         SHFLAGS='-shared'
3881         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3882         SLIB_INSTALL_LINKS=
3883         oss_indev_extralibs="-lossaudio"
3884         oss_outdev_extralibs="-lossaudio"
3885         ;;
3886     dragonfly)
3887         disable symver
3888         ;;
3889     freebsd)
3890         ;;
3891     bsd/os)
3892         add_extralibs -lpoll -lgnugetopt
3893         ;;
3894     darwin)
3895         enabled ppc && add_asflags -force_cpusubtype_ALL
3896         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3897         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3898         add_ldflags -Wl,-dynamic,-search_paths_first
3899         SLIBSUF=".dylib"
3900         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME).$(LIBVERSION)$(SLIBSUF)'
3901         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME).$(LIBMAJOR)$(SLIBSUF)'
3902         objformat="macho"
3903         enabled x86_64 && objformat="macho64"
3904         enabled_any pic shared ||
3905             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3906         check_header dispatch/dispatch.h &&
3907             add_cppflags '-I\$(SRC_PATH)/compat/dispatch_semaphore'
3908         ;;
3909     msys*)
3910         die "Native MSYS builds are discouraged, please use the MINGW environment."
3911         ;;
3912     mingw32*|mingw64*)
3913         if test $target_os = "mingw32ce"; then
3914             disable network
3915         else
3916             target_os=mingw32
3917         fi
3918         LIBTARGET=i386
3919         if enabled x86_64; then
3920             LIBTARGET="i386:x86-64"
3921         elif enabled arm; then
3922             LIBTARGET=arm-wince
3923         fi
3924         check_ldflags -Wl,--nxcompat
3925         check_ldflags -Wl,--dynamicbase
3926         shlibdir_default="$bindir_default"
3927         SLIBPREF=""
3928         SLIBSUF=".dll"
3929         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3930         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3931         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3932         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3933         SLIB_INSTALL_LINKS=
3934         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3935         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3936         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3937         objformat="win32"
3938         dlltool="${cross_prefix}dlltool"
3939         ranlib=:
3940         enable dos_paths
3941         ;;
3942     win32|win64)
3943         disable symver
3944         if enabled shared; then
3945             # Link to the import library instead of the normal static library
3946             # for shared libs.
3947             LD_LIB='%.lib'
3948             # Cannot build both shared and static libs with MSVC or icl.
3949             disable static
3950         fi
3951         shlibdir_default="$bindir_default"
3952         SLIBPREF=""
3953         SLIBSUF=".dll"
3954         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3955         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3956         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3957         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3958         SLIB_INSTALL_LINKS=
3959         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3960         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3961         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3962         objformat="win32"
3963         ranlib=:
3964         enable dos_paths
3965         ;;
3966     cygwin*)
3967         target_os=cygwin
3968         shlibdir_default="$bindir_default"
3969         SLIBPREF="cyg"
3970         SLIBSUF=".dll"
3971         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3972         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3973         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3974         SLIB_INSTALL_LINKS=
3975         SLIB_INSTALL_EXTRA_LIB='lib$(NAME).dll.a'
3976         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(NAME).dll.a'
3977         objformat="win32"
3978         enable dos_paths
3979         ;;
3980     *-dos|freedos|opendos)
3981         network_extralibs="-lsocket"
3982         objformat="coff"
3983         enable dos_paths
3984         add_cppflags -U__STRICT_ANSI__
3985         ;;
3986     linux)
3987         enable dv1394
3988         enable section_data_rel_ro
3989         ;;
3990     irix*)
3991         target_os=irix
3992         ranlib="echo ignoring ranlib"
3993         ;;
3994     os/2*)
3995         ln_s="cp -f"
3996         objformat="aout"
3997         add_cppflags -D_GNU_SOURCE
3998         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zhigh-mem -Zmap
3999         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
4000         LIBSUF="_s.a"
4001         SLIBPREF=""
4002         SLIBSUF=".dll"
4003         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
4004         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
4005         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
4006             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
4007             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
4008             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
4009             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
4010         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
4011             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
4012         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
4013         enable dos_paths
4014         ;;
4015     gnu/kfreebsd)
4016         add_cppflags -D_BSD_SOURCE
4017         ;;
4018     gnu)
4019         ;;
4020     qnx)
4021         add_cppflags -D_QNX_SOURCE
4022         network_extralibs="-lsocket"
4023         ;;
4024     symbian)
4025         SLIBSUF=".dll"
4026         enable dos_paths
4027         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
4028         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
4029         add_ldflags -Wl,--target1-abs,--no-undefined \
4030                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
4031                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
4032         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
4033                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
4034                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
4035         ;;
4036     osf1)
4037         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
4038         ;;
4039     minix)
4040         ;;
4041     none)
4042         ;;
4043     *)
4044         die "Unknown OS '$target_os'."
4045         ;;
4046 esac
4047
4048 # determine libc flavour
4049
4050 probe_libc(){
4051     pfx=$1
4052     pfx_no_=${pfx%_}
4053     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
4054     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
4055         eval ${pfx}libc_type=uclibc
4056         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4057     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
4058         eval ${pfx}libc_type=glibc
4059         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4060     # MinGW headers can be installed on Cygwin, so check for newlib first.
4061     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
4062         eval ${pfx}libc_type=newlib
4063         add_${pfx}cppflags -U__STRICT_ANSI__ -D_XOPEN_SOURCE=600
4064     # MinGW64 is backwards compatible with MinGW32, so check for it first.
4065     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
4066         eval ${pfx}libc_type=mingw64
4067         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4068         eval test \$${pfx_no_}cc_type = "gcc" &&
4069             add_${pfx}cppflags -D__printf__=__gnu_printf__
4070     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
4071          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
4072         eval ${pfx}libc_type=mingw32
4073         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
4074             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
4075             die "ERROR: MinGW32 runtime version must be >= 3.15."
4076         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4077         check_${pfx}cpp_condition _mingw.h "__MSVCRT_VERSION__ < 0x0700__" &&
4078             add_${pfx}cppflags -D__MSVCRT_VERSION__=0x0700
4079         eval test \$${pfx_no_}cc_type = "gcc" &&
4080             add_${pfx}cppflags -D__printf__=__gnu_printf__
4081     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
4082         eval ${pfx}libc_type=msvcrt
4083         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
4084             if [ "$pfx" = host_ ]; then
4085                 add_host_cppflags -Dsnprintf=_snprintf
4086             else
4087                 add_compat strtod.o strtod=avpriv_strtod
4088                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
4089                                              _snprintf=avpriv_snprintf  \
4090                                              vsnprintf=avpriv_vsnprintf
4091             fi
4092         fi
4093         add_${pfx}cppflags -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS
4094         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
4095         # 0x601 by default unless something else is set by the user.
4096         # This can easily lead to us detecting functions only present
4097         # in such new versions and producing binaries requiring windows 7.0.
4098         # Therefore explicitly set the default to XP unless the user has
4099         # set something else on the command line.
4100         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
4101         # family. For these cases, configure is free to use any functions
4102         # found in the SDK headers by default. (Alternatively, we could force
4103         # _WIN32_WINNT to 0x0602 in that case.)
4104         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
4105             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
4106 #ifdef WINAPI_FAMILY
4107 #include <winapifamily.h>
4108 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4109 #error not desktop
4110 #endif
4111 #endif
4112 EOF
4113         if [ "$pfx" = "" ]; then
4114             check_func strtoll || add_cflags -Dstrtoll=_strtoi64
4115         fi
4116     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4117         eval ${pfx}libc_type=klibc
4118     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4119         eval ${pfx}libc_type=bionic
4120     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4121         eval ${pfx}libc_type=solaris
4122         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4123     else
4124         eval ${pfx}libc_type=default
4125         add_${pfx}cppflags -D_DEFAULT_SOURCE
4126     fi
4127 }
4128
4129 probe_libc
4130 test -n "$libc_type" && enable libc_$libc_type
4131 probe_libc host_
4132 test -n "$host_libc_type" && enable host_libc_$host_libc_type
4133
4134 # hacks for compiler/libc/os combinations
4135
4136 case $libc_type in
4137     bionic)
4138         add_compat strtod.o strtod=avpriv_strtod
4139         ;;
4140     glibc)
4141         if enabled tms470; then
4142             CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4143             add_cppflags -D__USER_LABEL_PREFIX__=
4144             add_cppflags -D__builtin_memset=memset
4145             add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4146             add_cflags   -pds=48    # incompatible redefinition of macro
4147         elif enabled ccc; then
4148             add_ldflags -Wl,-z,now  # calls to libots crash without this
4149         fi
4150         ;;
4151 esac
4152
4153 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4154     add_cppflags '-I\$(SRC_PATH)/compat/float'
4155
4156 esc(){
4157     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4158 }
4159
4160 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" > avbuild/config.fate
4161
4162 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4163
4164 set_default $PATHS_LIST
4165 set_default nm
4166
4167 # we need to build at least one lib type
4168 if ! enabled_any static shared; then
4169     cat <<EOF
4170 At least one library type must be built.
4171 Specify --enable-static to build the static libraries or --enable-shared to
4172 build the shared libraries as well. To only build the shared libraries specify
4173 --disable-static in addition to --enable-shared.
4174 EOF
4175     exit 1
4176 fi
4177
4178 disabled optimizations || check_cflags -fomit-frame-pointer
4179
4180 enable_weak_pic() {
4181     disabled pic && return
4182     enable pic
4183     add_cppflags -DPIC
4184     case "$target_os" in
4185     mingw*|cygwin*)
4186         ;;
4187     *)
4188         add_cflags -fPIC
4189         ;;
4190     esac
4191     add_asflags  -fPIC
4192 }
4193
4194 enabled pic && enable_weak_pic
4195
4196 check_cc <<EOF || die "Symbol mangling check failed."
4197 int ff_extern;
4198 EOF
4199 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4200 extern_prefix=${sym%%ff_extern*}
4201
4202 check_inline_asm inline_asm '"" ::'
4203
4204 _restrict=
4205 for restrict_keyword in restrict __restrict__ __restrict; do
4206     check_cc <<EOF && _restrict=$restrict_keyword && break
4207 void foo(char * $restrict_keyword p);
4208 EOF
4209 done
4210
4211 check_cc <<EOF && enable pragma_deprecated
4212 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4213 EOF
4214
4215 check_cc <<EOF && enable attribute_packed
4216 struct { int x; } __attribute__((packed)) x;
4217 EOF
4218
4219 check_cc <<EOF && enable attribute_may_alias
4220 union { int x; } __attribute__((may_alias)) x;
4221 EOF
4222
4223 check_cc <<EOF || die "endian test failed"
4224 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4225 EOF
4226 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4227
4228 check_gas() {
4229     log "check_gas using '$as' as AS"
4230     # :vararg is used on aarch64, arm and ppc altivec
4231     check_as <<EOF || return 1
4232 .macro m n, y:vararg=0
4233 \n: .int \y
4234 .endm
4235 m x
4236 EOF
4237     # .altmacro is only used in arm asm
4238     ! enabled arm || check_as <<EOF || return 1
4239 .altmacro
4240 EOF
4241     enable gnu_as
4242     return 0
4243 }
4244
4245 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4246     nogas=:
4247     enabled_any arm aarch64 && nogas=die
4248     enabled_all ppc altivec && nogas=warn
4249     as_noop=-v
4250
4251     case $as_type in
4252         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4253         gcc)  gaspp_as_type=gas ;;
4254         *)    gaspp_as_type=$as_type ;;
4255     esac
4256
4257     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4258
4259     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4260         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4261
4262     if ! check_gas ; then
4263         as=${gas:=$as}
4264         check_gas || \
4265             $nogas "GNU assembler not found, install/update gas-preprocessor"
4266     fi
4267
4268     check_as <<EOF && enable as_func
4269 .func test
4270 .endfunc
4271 EOF
4272 fi
4273
4274 check_inline_asm inline_asm_labels '"1:\n"'
4275
4276 if enabled aarch64; then
4277     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4278     # internal assembler in clang 3.3 does not support this instruction
4279     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4280     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4281
4282     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4283
4284 elif enabled alpha; then
4285
4286     check_cflags -mieee
4287
4288 elif enabled arm; then
4289
4290     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4291     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4292     enabled thumb && check_cflags -mthumb || check_cflags -marm
4293
4294     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4295         enable vfp_args
4296     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4297         enable vfp_args
4298     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4299         case "${cross_prefix:-$cc}" in
4300             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4301             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4302 __asm__ (".eabi_attribute 28, 1");
4303 int main(void) { return 0; }
4304 EOF
4305         esac
4306         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4307     fi
4308
4309     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4310     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4311     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4312     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4313     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4314     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4315
4316     [ $target_os = linux ] || [ $target_os = android ] ||
4317         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4318             $ARCH_EXT_LIST_ARM
4319
4320     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4321
4322     check_as <<EOF && enable as_dn_directive
4323 ra .dn d0.i16
4324 .unreq ra
4325 EOF
4326     check_as <<EOF && enable as_fpu_directive
4327 .fpu neon
4328 EOF
4329
4330     # llvm's integrated assembler supports .object_arch from llvm 3.5
4331     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4332 .object_arch armv4
4333 EOF
4334
4335     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4336
4337 elif enabled mips; then
4338
4339     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4340
4341     # make sure that only an instruction set is enabled
4342     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4343
4344     if enabled mips64; then
4345         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4346             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4347                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4348     else
4349         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4350             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4351                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4352     fi
4353
4354 elif enabled parisc; then
4355
4356     if enabled gcc; then
4357         case $($cc -dumpversion) in
4358             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4359         esac
4360     fi
4361
4362 elif enabled ppc; then
4363
4364     enable local_aligned_8 local_aligned_16 local_aligned_32
4365
4366     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4367     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4368     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4369     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4370
4371     # AltiVec flags: The FSF version of GCC differs from the Apple version
4372     if enabled altivec; then
4373         check_cflags -maltivec -mabi=altivec &&
4374         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4375         check_cflags -faltivec
4376
4377         # check if our compiler supports Motorola AltiVec C API
4378         check_cc <<EOF || disable altivec
4379 $inc_altivec_h
4380 int main(void) {
4381     vector signed int v1 = (vector signed int) { 0 };
4382     vector signed int v2 = (vector signed int) { 1 };
4383     v1 = vec_add(v1, v2);
4384     return 0;
4385 }
4386 EOF
4387
4388         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4389     fi
4390
4391     if enabled vsx; then
4392         check_cflags -mvsx &&
4393         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4394     fi
4395
4396     if enabled power8; then
4397         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4398     fi
4399
4400 elif enabled x86; then
4401
4402     check_builtin rdtsc    intrin.h   "__rdtsc()"
4403     check_builtin mm_empty mmintrin.h "_mm_empty()"
4404
4405     enable local_aligned_8 local_aligned_16 local_aligned_32
4406
4407     # check whether EBP is available on x86
4408     # As 'i' is stored on the stack, this program will crash
4409     # if the base pointer is used to access it because the
4410     # base pointer is cleared in the inline assembly code.
4411     check_exec_crash <<EOF && enable ebp_available
4412 volatile int i=0;
4413 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4414 return i;
4415 EOF
4416
4417     # check whether EBX is available on x86
4418     check_inline_asm ebx_available '""::"b"(0)' &&
4419         check_inline_asm ebx_available '"":::"%ebx"'
4420
4421     # check whether xmm clobbers are supported
4422     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4423
4424     # check whether binutils is new enough to compile SSSE3/MMXEXT
4425     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4426     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4427
4428     if ! disabled_any asm mmx yasm; then
4429         if check_cmd $yasmexe --version; then
4430             enabled x86_64 && yasm_extra="-m amd64"
4431             yasm_debug="-g dwarf2"
4432         elif check_cmd nasm -v; then
4433             yasmexe=nasm
4434             yasm_debug="-g -F dwarf"
4435             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4436         fi
4437
4438         YASMFLAGS="-f $objformat $yasm_extra"
4439         enabled pic               && append YASMFLAGS "-DPIC"
4440         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4441         case "$objformat" in
4442             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4443         esac
4444
4445         check_yasm "movbe ecx, [5]" && enable yasm ||
4446             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4447         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4448         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4449         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4450         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4451         check_yasm "CPU amdnop" || disable cpunop
4452     fi
4453
4454     case "$cpu" in
4455         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4456             disable fast_clz
4457         ;;
4458     esac
4459
4460 fi
4461
4462 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4463
4464 check_ldflags -Wl,--as-needed
4465
4466 if check_func dlopen; then
4467     ldl=
4468 elif check_func dlopen -ldl; then
4469     ldl=-ldl
4470 fi
4471
4472 if ! disabled network; then
4473     check_func getaddrinfo $network_extralibs
4474     check_func inet_aton $network_extralibs
4475
4476     check_type netdb.h "struct addrinfo"
4477     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4478     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4479     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4480     check_type poll.h "struct pollfd"
4481     check_type netinet/sctp.h "struct sctp_event_subscribe"
4482     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4483     check_type netinet/in.h "struct sockaddr_in6"
4484     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4485     check_type "sys/types.h sys/socket.h" socklen_t
4486
4487     # Prefer arpa/inet.h over winsock2
4488     if check_header arpa/inet.h ; then
4489         check_func closesocket
4490     elif check_header winsock2.h ; then
4491         check_func_headers winsock2.h closesocket -lws2 &&
4492             network_extralibs="-lws2" ||
4493         { check_func_headers winsock2.h closesocket -lws2_32 &&
4494             network_extralibs="-lws2_32"; } || disable winsock2_h network
4495         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4496
4497         check_type ws2tcpip.h socklen_t
4498         check_type ws2tcpip.h "struct addrinfo"
4499         check_type ws2tcpip.h "struct group_source_req"
4500         check_type ws2tcpip.h "struct ip_mreq_source"
4501         check_type ws2tcpip.h "struct ipv6_mreq"
4502         check_type winsock2.h "struct pollfd"
4503         check_struct winsock2.h "struct sockaddr" sa_len
4504         check_type ws2tcpip.h "struct sockaddr_in6"
4505         check_type ws2tcpip.h "struct sockaddr_storage"
4506     else
4507         disable network
4508     fi
4509 fi
4510
4511 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4512 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4513 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4514 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4515
4516 case "$custom_allocator" in
4517     jemalloc)
4518         # jemalloc by default does not use a prefix
4519         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4520     ;;
4521     tcmalloc)
4522         require_pkg_config "" libtcmalloc gperftools/tcmalloc.h tc_malloc
4523         malloc_prefix=tc_
4524     ;;
4525 esac
4526
4527 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4528 check_func  ${malloc_prefix}memalign            && enable memalign
4529 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4530
4531 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4532     check_func_headers time.h clock_gettime ||
4533         { check_lib clock_gettime time.h clock_gettime -lrt && LIBRT="-lrt"; }
4534
4535 check_func  fcntl
4536 check_func  fork
4537 check_func  gethrtime
4538 check_func  getopt
4539 check_func  getrusage
4540 check_func  gettimeofday
4541 check_func  gmtime_r
4542 check_func  isatty
4543 check_func  localtime_r
4544 check_func  mach_absolute_time
4545 check_func  mkstemp
4546 check_func  mmap
4547 check_func  mprotect
4548 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4549 check_func_headers time.h nanosleep || check_lib nanosleep time.h nanosleep -lrt
4550 check_func  sched_getaffinity
4551 check_func  setrlimit
4552 check_func  strerror_r
4553 check_func  sysconf
4554 check_func  sysctl
4555 check_func  usleep
4556
4557 check_func_headers io.h setmode
4558 check_func_headers stdlib.h getenv
4559
4560 check_func_headers windows.h GetProcessAffinityMask
4561 check_func_headers windows.h GetProcessTimes
4562 check_func_headers windows.h GetSystemTimeAsFileTime
4563 check_func_headers windows.h LoadLibrary
4564 check_func_headers windows.h MapViewOfFile
4565 check_func_headers windows.h SetConsoleTextAttribute
4566 check_func_headers windows.h Sleep
4567 check_func_headers windows.h VirtualAlloc
4568 check_struct windows.h "CONDITION_VARIABLE" Ptr
4569
4570 check_header d3d11.h
4571 check_header direct.h
4572 check_header dlfcn.h
4573 check_header dxva.h
4574 check_header dxva2api.h
4575 check_header io.h
4576 check_header mach/mach_time.h
4577 check_header malloc.h
4578 check_header poll.h
4579 check_header sys/mman.h
4580 check_header sys/param.h
4581 check_header sys/resource.h
4582 check_header sys/select.h
4583 check_header sys/time.h
4584 check_header sys/un.h
4585 check_header unistd.h
4586 check_header valgrind/valgrind.h
4587 check_header VideoDecodeAcceleration/VDADecoder.h
4588 check_header windows.h
4589 check_header X11/extensions/XvMClib.h
4590
4591 # it seems there are versions of clang in some distros that try to use the
4592 # gcc headers, which explodes for stdatomic
4593 # so we also check that atomics actually work here
4594 check_builtin stdatomic_h stdatomic.h "atomic_int foo; atomic_store(&foo, 0)"
4595
4596 check_lib shell32  "windows.h shellapi.h" CommandLineToArgvW   -lshell32
4597 check_lib wincrypt "windows.h wincrypt.h" CryptGenRandom       -ladvapi32
4598 check_lib psapi    "windows.h psapi.h"    GetProcessMemoryInfo -lpsapi
4599
4600 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4601
4602 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4603 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4604 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4605
4606 check_type "va/va.h va/va_dec_hevc.h" "VAPictureParameterBufferHEVC"
4607 check_type "va/va.h va/va_dec_vp8.h" "VAPictureParameterBufferVP8"
4608 check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
4609 check_type "va/va.h va/va_enc_h264.h" "VAEncPictureParameterBufferH264"
4610 check_type "va/va.h va/va_enc_hevc.h" "VAEncPictureParameterBufferHEVC"
4611 check_type "va/va.h va/va_enc_jpeg.h" "VAEncPictureParameterBufferJPEG"
4612 check_type "va/va.h va/va_enc_mpeg2.h" "VAEncPictureParameterBufferMPEG2"
4613 check_type "va/va.h va/va_enc_vp8.h"  "VAEncPictureParameterBufferVP8"
4614
4615 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4616
4617 if ! disabled w32threads && ! enabled pthreads; then
4618     check_lib w32threads "windows.h process.h" _beginthreadex
4619 fi
4620
4621 # check for some common methods of building with pthread support
4622 # do this before the optional library checks as some of them require pthreads
4623 if ! disabled pthreads && ! enabled w32threads; then
4624     if check_lib pthreads pthread.h pthread_join -pthread; then
4625         add_cflags -pthread
4626     elif check_lib pthreads pthread.h pthread_join -pthreads; then
4627         add_cflags -pthreads
4628     elif check_lib pthreads pthread.h pthread_join -lpthreadGC2; then
4629         :
4630     elif check_lib pthreads pthread.h pthread_join -lpthread; then
4631         :
4632     elif check_func pthread_join; then
4633         enable pthreads
4634     fi
4635 fi
4636
4637 enabled pthreads &&
4638     check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwait(s,0); sem_destroy(s)"
4639
4640 disabled  zlib || check_lib  zlib  zlib.h      zlibVersion -lz
4641 disabled bzlib || check_lib bzlib bzlib.h BZ2_bzlibVersion -lbz2
4642
4643 check_lib libm math.h sin -lm && LIBM="-lm"
4644
4645 atan2f_args=2
4646 ldexpf_args=2
4647 powf_args=2
4648
4649 for func in $MATH_FUNCS; do
4650     eval check_mathfunc $func \${${func}_args:-1} $LIBM
4651 done
4652
4653 # these are off by default, so fail if requested and not available
4654 enabled avisynth          && require_header avisynth/avisynth_c.h
4655 enabled avxsynth          && require avxsynth "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl
4656 enabled cuda              && require cuda cuda.h cuInit -lcuda
4657 enabled frei0r            && require_header frei0r.h
4658 enabled gnutls            && require_pkg_config "" gnutls gnutls/gnutls.h gnutls_global_init
4659 enabled libbs2b           && require_pkg_config "" libbs2b bs2b.h bs2b_open
4660 enabled libdc1394         && require_pkg_config libdc1394 libdc1394-2 dc1394/dc1394.h dc1394_new
4661 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4662 enabled libfaac           && require libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4663 enabled libfdk_aac        && require_pkg_config libfdk_aac fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4664 enabled libfontconfig     && require_pkg_config libfontconfig fontconfig "fontconfig/fontconfig.h" FcInit
4665 enabled libfreetype       && require_pkg_config libfreetype freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4666 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4667                                    check_lib libgsm "${gsm_hdr}" gsm_create -lgsm && break;
4668                                done || die "ERROR: libgsm not found"; }
4669 enabled libhdcd           && require_pkg_config "" libhdcd "hdcd/hdcd_simple.h" hdcd_new
4670 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4671 enabled libkvazaar        && require_pkg_config libkvazaar "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4672 enabled libmfx            && require_pkg_config "" libmfx "mfx/mfxvideo.h" MFXInit
4673 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4674 enabled libnpp            && require libnpp npp.h nppGetLibVersion -lnppi -lnppc
4675 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4676 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4677 enabled libopencv         && require_pkg_config libopencv opencv opencv/cv.h cvCreateImageHeader
4678 enabled libopenh264       && require_pkg_config libopenh264 openh264 wels/codec_api.h WelsGetCodecVersion
4679 enabled libopenjpeg       && { check_lib libopenjpeg openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC ||
4680                                require_pkg_config libopenjpeg libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; }
4681 enabled libopus           && require_pkg_config libopus opus opus_multistream.h opus_multistream_decoder_create
4682 enabled libpulse          && require_pkg_config libpulse libpulse-simple pulse/simple.h pa_simple_new
4683 enabled librtmp           && require_pkg_config "" librtmp librtmp/rtmp.h RTMP_Socket
4684 enabled libschroedinger   && require_pkg_config libschroedinger schroedinger-1.0 schroedinger/schro.h schro_init
4685 enabled libsnappy         && require libsnappy snappy-c.h snappy_compress -lsnappy
4686 enabled libspeex          && require_pkg_config libspeex speex speex/speex.h speex_decoder_init -lspeex
4687 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4688 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4689 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4690 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4691 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4692 enabled libvpx            && require_pkg_config libvpx "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4693     enabled libvpx_vp8_decoder && {
4694         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4695             disable libvpx_vp8_decoder;
4696     }
4697     enabled libvpx_vp8_encoder && {
4698         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4699             disable libvpx_vp8_encoder;
4700     }
4701     enabled libvpx_vp9_decoder && {
4702         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4703             disable libvpx_vp9_decoder;
4704     }
4705     enabled libvpx_vp9_encoder && {
4706         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4707             disable libvpx_vp9_encoder;
4708     }
4709     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4710         die "libvpx enabled but no supported decoders found"
4711     fi
4712 }
4713 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4714 enabled libwebp           && require_pkg_config "" libwebp webp/encode.h WebPGetEncoderVersion
4715 enabled libx264           && require_pkg_config libx264 x264 "stdint.h x264.h" x264_encoder_encode &&
4716                              require_cpp_condition x264.h "X264_BUILD >= 118" &&
4717                              { check_cpp_condition x264.h "X264_MPEG2" &&
4718                                enable libx262; }
4719 enabled libx265           && require_pkg_config libx265 x265 x265.h x265_api_get &&
4720                              require_cpp_condition x265.h "X265_BUILD >= 57"
4721 enabled libxavs           && require libxavs "stdint.h xavs.h" xavs_encoder_encode -lxavs
4722 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4723 enabled mmal              && { check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4724                                { ! enabled cross_compile &&
4725                                  add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline &&
4726                                  add_ldflags -L/opt/vc/lib/ &&
4727                                  check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host; } ||
4728                                die "ERROR: mmal not found" &&
4729                                check_func_headers interface/mmal/mmal.h "MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS"; }
4730 enabled omx_rpi           && { check_header OMX_Core.h ||
4731                                { ! enabled cross_compile && add_cflags -isystem/opt/vc/include/IL && check_header OMX_Core.h ; } ||
4732                                die "ERROR: OpenMAX IL headers not found"; }
4733 enabled omx               && require_header OMX_Core.h
4734 enabled openssl           && { { check_pkg_config openssl openssl/ssl.h OPENSSL_init_ssl ||
4735                                  check_pkg_config openssl openssl/ssl.h SSL_library_init; } && {
4736                                add_cflags $openssl_cflags && add_extralibs $openssl_extralibs; } ||
4737                                check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4738                                check_lib openssl openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4739                                check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4740                                die "ERROR: openssl not found"; }
4741
4742 enabled gnutls            && check_lib gmp gmp.h mpz_export -lgmp
4743
4744 if enabled nvenc; then
4745     require_header nvEncodeAPI.h
4746     require_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 6"
4747 fi
4748
4749 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4750     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4751     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4752     enable sdl
4753 fi
4754
4755 ! disabled pod2man   && check_cmd pod2man --help     && enable pod2man   || disable pod2man
4756 ! disabled texi2html && check_cmd texi2html -version && enable texi2html || disable texi2html
4757
4758 check_header linux/fb.h
4759 check_header linux/videodev2.h
4760 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4761
4762 check_header AVFoundation/AVFoundation.h
4763
4764 check_header sys/videoio.h
4765
4766 check_lib user32 "windows.h winuser.h" GetShellWindow -luser32
4767 check_lib vfw32 "windows.h vfw.h" capCreateCaptureWindow -lvfw32
4768 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4769 # w32api 3.12 had it defined wrong
4770 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4771
4772 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4773 { check_header dev/bktr/ioctl_meteor.h &&
4774   check_header dev/bktr/ioctl_bt848.h; } ||
4775 { check_header machine/ioctl_meteor.h &&
4776   check_header machine/ioctl_bt848.h; } ||
4777 { check_header dev/video/meteor/ioctl_meteor.h &&
4778   check_header dev/video/bktr/ioctl_bt848.h; } ||
4779 check_header dev/ic/bt8xx.h
4780
4781 check_header sys/soundcard.h
4782 check_header soundcard.h
4783
4784 enabled_any alsa_indev alsa_outdev &&
4785     check_lib alsa alsa/asoundlib.h snd_pcm_htimestamp -lasound
4786
4787 enabled jack_indev && check_lib jack jack/jack.h jack_client_open -ljack &&
4788     check_func jack_port_get_latency_range -ljack
4789
4790 enabled_any sndio_indev sndio_outdev && check_lib sndio sndio.h sio_open -lsndio
4791
4792 if enabled libcdio; then
4793     check_lib libcdio "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4794     check_lib libcdio "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4795     die "ERROR: No usable libcdio/cdparanoia found"
4796 fi
4797
4798 if enabled libxcb; then
4799     require_pkg_config libxcb xcb-shape xcb/shape.h xcb_shape_rectangles
4800     disabled libxcb_shm ||
4801         require_pkg_config libxcb_shm xcb-shm xcb/shm.h xcb_shm_attach
4802     disabled libxcb_xfixes ||
4803         require_pkg_config libxcb_xfixes xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image
4804 fi
4805
4806 enabled dxva2 &&
4807     check_lib dxva2_lib windows.h CoTaskMemFree -lole32
4808
4809 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4810
4811 enabled vaapi &&
4812     check_code cc "va/va.h" "vaCreateSurfaces(0, 0, 0, 0, 0, 0, 0, 0)" ||
4813     disable vaapi
4814
4815 enabled vaapi &&
4816     check_lib vaapi_drm "va/va.h va/va_drm.h" vaGetDisplayDRM -lva -lva-drm
4817
4818 enabled vaapi &&
4819     check_lib vaapi_x11 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 -lX11
4820
4821 enabled vdpau &&
4822     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4823     disable vdpau
4824
4825 enabled vdpau &&
4826     check_lib vdpau_x11 "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau -lX11
4827
4828 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4829
4830 # add some useful compiler flags if supported
4831 check_cflags -Wdeclaration-after-statement
4832 check_cflags -Wall
4833 check_cflags -Wdisabled-optimization
4834 check_cflags -Wpointer-arith
4835 check_cflags -Wredundant-decls
4836 check_cflags -Wwrite-strings
4837 check_cflags -Wtype-limits
4838 check_cflags -Wundef
4839 check_cflags -Wmissing-prototypes
4840 check_cflags -Wstrict-prototypes
4841
4842 if enabled extra_warnings; then
4843     check_cflags -Wcast-qual
4844