build: Allow generating dependencies as a side-effect of assembling
[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-x86asm         disable use of standalone x86 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 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         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             for dep in $dep_all $dep_any $dep_sgs; do
643                 # filter out library deps, these do not belong in extralibs
644                 is_in $dep $LIBRARY_LIST && continue
645                 enabled $dep && eval append ${cfg}_extralibs ${dep}_extralibs
646             done
647         fi
648
649         disable ${cfg}_checking
650     done
651 }
652
653 print_config(){
654     pfx=$1
655     files=$2
656     shift 2
657     map 'eval echo "$v \${$v:-no}"' "$@" |
658     awk "BEGIN { split(\"$files\", files) }
659         {
660             c = \"$pfx\" toupper(\$1);
661             v = \$2;
662             sub(/yes/, 1, v);
663             sub(/no/,  0, v);
664             for (f in files) {
665                 file = files[f];
666                 if (file ~ /\\.h\$/) {
667                     printf(\"#define %s %d\\n\", c, v) >>file;
668                 } else if (file ~ /\\.asm\$/) {
669                     printf(\"%%define %s %d\\n\", c, v) >>file;
670                 } else if (file ~ /\\.mak\$/) {
671                     n = -v ? \"\" : \"!\";
672                     printf(\"%s%s=yes\\n\", n, c) >>file;
673                 }
674             }
675         }"
676 }
677
678 print_enabled(){
679     suf=$1
680     shift
681     for v; do
682         enabled $v && printf "%s\n" ${v%$suf}
683     done
684 }
685
686 append(){
687     var=$1
688     shift
689     eval "$var=\"\$$var $*\""
690 }
691
692 prepend(){
693     var=$1
694     shift
695     eval "$var=\"$* \$$var\""
696 }
697
698 unique(){
699     var=$1
700     uniq_list=""
701     for tok in $(eval echo \$$var); do
702         uniq_list="$(filter_out $tok $uniq_list) $tok"
703     done
704     eval "$var=\"${uniq_list}\""
705 }
706
707 resolve(){
708     var=$1
709     tmpvar=
710     for entry in $(eval echo \$$var); do
711         tmpvar="$tmpvar $(eval echo \$${entry})"
712     done
713     eval "$var=\"${tmpvar}\""
714 }
715
716 add_cppflags(){
717     append CPPFLAGS "$@"
718 }
719
720 add_cflags(){
721     append CFLAGS $($cflags_filter "$@")
722 }
723
724 add_cflags_headers(){
725     append CFLAGS_HEADERS $($cflags_filter "$@")
726 }
727
728 add_asflags(){
729     append ASFLAGS $($asflags_filter "$@")
730 }
731
732 add_objcflags(){
733     append OBJCFLAGS $($objcflags_filter "$@")
734 }
735
736 add_ldflags(){
737     append LDFLAGS $($ldflags_filter "$@")
738 }
739
740 add_ldexeflags(){
741     append LDEXEFLAGS $($ldflags_filter "$@")
742 }
743
744 add_stripflags(){
745     append STRIPFLAGS "$@"
746 }
747
748 add_extralibs(){
749     prepend extralibs $($ldflags_filter "$@")
750 }
751
752 add_host_cppflags(){
753     append host_cppflags "$@"
754 }
755
756 add_host_cflags(){
757     append host_cflags $($host_cflags_filter "$@")
758 }
759
760 add_host_ldflags(){
761     append host_ldflags $($host_ldflags_filter "$@")
762 }
763
764 add_compat(){
765     append compat_objs $1
766     shift
767     map 'add_cppflags -D$v' "$@"
768 }
769
770 check_cmd(){
771     log "$@"
772     "$@" >> $logfile 2>&1
773 }
774
775 cc_o(){
776     eval printf '%s\\n' $CC_O
777 }
778
779 cc_e(){
780     eval printf '%s\\n' $CC_E
781 }
782
783 check_cc(){
784     log check_cc "$@"
785     cat > $TMPC
786     log_file $TMPC
787     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
788 }
789
790 check_objcc(){
791     log check_objcc "$@"
792     cat > $TMPC
793     log_file $TMPC
794     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
795 }
796
797 check_cpp(){
798     log check_cpp "$@"
799     cat > $TMPC
800     log_file $TMPC
801     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
802 }
803
804 as_o(){
805     eval printf '%s\\n' $AS_O
806 }
807
808 check_as(){
809     log check_as "$@"
810     cat > $TMPS
811     log_file $TMPS
812     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
813 }
814
815 check_inline_asm(){
816     log check_inline_asm "$@"
817     name="$1"
818     code="$2"
819     shift 2
820     disable $name
821     check_cc "$@" <<EOF && enable $name
822 void foo(void){ __asm__ volatile($code); }
823 EOF
824 }
825
826 check_insn(){
827     log check_insn "$@"
828     check_inline_asm ${1}_inline "\"$2\""
829     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
830 }
831
832 check_x86asm(){
833     log check_x86asm "$@"
834     echo "$1" > $TMPS
835     log_file $TMPS
836     shift 1
837     check_cmd $x86asmexe $X86ASMFLAGS "$@" -o $TMPO $TMPS
838 }
839
840 ld_o(){
841     eval printf '%s\\n' $LD_O
842 }
843
844 check_ld(){
845     log check_ld "$@"
846     flags=$(filter_out '-l*' "$@")
847     libs=$(filter '-l*' "$@")
848     check_cc $($cflags_filter $flags) || return
849     flags=$($ldflags_filter $flags)
850     libs=$($ldflags_filter $libs)
851     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
852 }
853
854 print_include(){
855     hdr=$1
856     test "${hdr%.h}" = "${hdr}" &&
857         echo "#include $hdr"    ||
858         echo "#include <$hdr>"
859 }
860
861 check_code(){
862     log check_code "$@"
863     check=$1
864     headers=$2
865     code=$3
866     shift 3
867     {
868         for hdr in $headers; do
869             print_include $hdr
870         done
871         echo "int main(void) { $code; return 0; }"
872     } | check_$check "$@"
873 }
874
875 check_cppflags(){
876     log check_cppflags "$@"
877     check_cpp "$@" <<EOF && append CPPFLAGS "$@"
878 #include <stdlib.h>;
879 EOF
880 }
881
882 test_cflags(){
883     log test_cflags "$@"
884     set -- $($cflags_filter "$@")
885     check_cc "$@" <<EOF
886 int x;
887 EOF
888 }
889
890 check_cflags(){
891     log check_cflags "$@"
892     test_cflags "$@" && add_cflags "$@"
893 }
894
895 test_objcflags(){
896     log test_objcflags "$@"
897     set -- $($objcflags_filter "$@")
898     check_objcc "$@" <<EOF
899 int x;
900 EOF
901 }
902
903 check_objcflags(){
904     log check_objcflags "$@"
905     test_objcflags "$@" && add_objcflags "$@"
906 }
907
908 test_ldflags(){
909     log test_ldflags "$@"
910     check_ld "$@" <<EOF
911 int main(void){ return 0; }
912 EOF
913 }
914
915 check_ldflags(){
916     log check_ldflags "$@"
917     test_ldflags "$@" && add_ldflags "$@"
918 }
919
920 test_stripflags(){
921     log test_stripflags "$@"
922     # call check_cc to get a fresh TMPO
923     check_cc <<EOF
924 int main(void) { return 0; }
925 EOF
926     check_cmd $strip $STRIPFLAGS "$@" $TMPO
927 }
928
929 check_stripflags(){
930     log check_stripflags "$@"
931     test_stripflags "$@" && add_stripflags "$@"
932 }
933
934 check_header(){
935     log check_header "$@"
936     header=$1
937     shift
938     disable_safe $header
939     check_cpp "$@" <<EOF && enable_safe $header
940 #include <$header>
941 int x;
942 EOF
943 }
944
945 check_func(){
946     log check_func "$@"
947     func=$1
948     shift
949     disable $func
950     check_ld "$@" <<EOF && enable $func
951 extern int $func();
952 int main(void){ $func(); }
953 EOF
954 }
955
956 check_mathfunc(){
957     log check_mathfunc "$@"
958     func=$1
959     narg=$2
960     shift 2
961     test $narg = 2 && args="f, g" || args="f"
962     disable $func
963     check_ld "$@" <<EOF && enable $func
964 #include <math.h>
965 float foo(float f, float g) { return $func($args); }
966 int main(void){ return 0; }
967 EOF
968 }
969
970 check_func_headers(){
971     log check_func_headers "$@"
972     headers=$1
973     funcs=$2
974     shift 2
975     {
976         for hdr in $headers; do
977             print_include $hdr
978         done
979         for func in $funcs; do
980             echo "long check_$func(void) { return (long) $func; }"
981         done
982         echo "int main(void) { return 0; }"
983     } | check_ld "$@" && enable $funcs && enable_safe $headers
984 }
985
986 check_cpp_condition(){
987     log check_cpp_condition "$@"
988     header=$1
989     condition=$2
990     shift 2
991     check_cpp "$@" <<EOF
992 #include <$header>
993 #if !($condition)
994 #error "unsatisfied condition: $condition"
995 #endif
996 EOF
997 }
998
999 test_cflags_cpp(){
1000     log test_cflags_cpp "$@"
1001     flags=$1
1002     condition=$2
1003     shift 2
1004     set -- $($cflags_filter "$flags")
1005     check_cpp "$@" <<EOF
1006 #if !($condition)
1007 #error "unsatisfied condition: $condition"
1008 #endif
1009 EOF
1010 }
1011
1012 check_lib(){
1013     log check_lib "$@"
1014     name="$1"
1015     headers="$2"
1016     funcs="$3"
1017     shift 3
1018     disable $name
1019     check_func_headers "$headers" "$funcs" "$@" &&
1020         enable $name && eval ${name}_extralibs="\$@"
1021 }
1022
1023 check_pkg_config(){
1024     log check_pkg_config "$@"
1025     name="$1"
1026     pkg_version="$2"
1027     pkg="${2%% *}"
1028     headers="$3"
1029     funcs="$4"
1030     shift 4
1031     disable $name
1032     check_cmd $pkg_config --exists --print-errors $pkg_version || return
1033     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1034     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1035     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1036         enable $name &&
1037         add_cflags    "$pkg_cflags" &&
1038         eval $(sanitize_var_name ${name}_extralibs)="\$pkg_libs"
1039 }
1040
1041 check_exec(){
1042     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1043 }
1044
1045 check_exec_crash(){
1046     log check_exec_crash "$@"
1047     code=$(cat)
1048
1049     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1050     # are safe but may not be available everywhere.  Thus we use
1051     # raise(SIGTERM) instead.  The check is run in a subshell so we
1052     # can redirect the "Terminated" message from the shell.  SIGBUS
1053     # is not defined by standard C so it is used conditionally.
1054
1055     (check_exec "$@") >> $logfile 2>&1 <<EOF
1056 #include <signal.h>
1057 static void sighandler(int sig){
1058     raise(SIGTERM);
1059 }
1060 int foo(void){
1061     $code
1062 }
1063 int (*func_ptr)(void) = foo;
1064 int main(void){
1065     signal(SIGILL, sighandler);
1066     signal(SIGFPE, sighandler);
1067     signal(SIGSEGV, sighandler);
1068 #ifdef SIGBUS
1069     signal(SIGBUS, sighandler);
1070 #endif
1071     return func_ptr();
1072 }
1073 EOF
1074 }
1075
1076 check_type(){
1077     log check_type "$@"
1078     headers=$1
1079     type=$2
1080     shift 2
1081     disable_safe "$type"
1082     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1083 }
1084
1085 check_struct(){
1086     log check_struct "$@"
1087     headers=$1
1088     struct=$2
1089     member=$3
1090     shift 3
1091     disable_safe "${struct}_${member}"
1092     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1093         enable_safe "${struct}_${member}"
1094 }
1095
1096 check_builtin(){
1097     log check_builtin "$@"
1098     name=$1
1099     headers=$2
1100     builtin=$3
1101     shift 3
1102     disable "$name"
1103     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1104 }
1105
1106 check_compile_assert(){
1107     log check_compile_assert "$@"
1108     name=$1
1109     headers=$2
1110     condition=$3
1111     shift 3
1112     disable "$name"
1113     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1114 }
1115
1116 require(){
1117     log require "$@"
1118     name_version="$1"
1119     name="${1%% *}"
1120     headers="$2"
1121     func="$3"
1122     shift 3
1123     check_lib $name "$headers" $func "$@" || die "ERROR: $name_version not found"
1124 }
1125
1126 require_header(){
1127     log require "$@"
1128     header="$1"
1129     shift
1130     check_header "$header" "$@" || die "ERROR: $header not found"
1131 }
1132
1133 require_cpp_condition(){
1134     log require "$@"
1135     header="$1"
1136     condition="$2"
1137     shift 2
1138     check_cpp_condition "$header" "$condition" "$@" || die "ERROR: $condition not satisfied"
1139 }
1140
1141 require_pkg_config(){
1142     log require_pkg_config "$@"
1143     pkg_version="$2"
1144     check_pkg_config "$@" || die "ERROR: $pkg_version not found"
1145 }
1146
1147 hostcc_e(){
1148     eval printf '%s\\n' $HOSTCC_E
1149 }
1150
1151 hostcc_o(){
1152     eval printf '%s\\n' $HOSTCC_O
1153 }
1154
1155 check_host_cc(){
1156     log check_host_cc "$@"
1157     cat > $TMPC
1158     log_file $TMPC
1159     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1160 }
1161
1162 check_host_cpp(){
1163     log check_host_cpp "$@"
1164     cat > $TMPC
1165     log_file $TMPC
1166     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1167 }
1168
1169 check_host_cppflags(){
1170     log check_host_cppflags "$@"
1171     check_host_cpp "$@" <<EOF && append host_cppflags "$@"
1172 #include <stdlib.h>;
1173 EOF
1174 }
1175
1176 check_host_cflags(){
1177     log check_host_cflags "$@"
1178     set -- $($host_cflags_filter "$@")
1179     check_host_cc "$@" <<EOF && append host_cflags "$@"
1180 int x;
1181 EOF
1182 }
1183
1184 check_host_cpp_condition(){
1185     log check_host_cpp_condition "$@"
1186     header=$1
1187     condition=$2
1188     shift 2
1189     check_host_cpp "$@" <<EOF
1190 #include <$header>
1191 #if !($condition)
1192 #error "unsatisfied condition: $condition"
1193 #endif
1194 EOF
1195 }
1196
1197 apply(){
1198     file=$1
1199     shift
1200     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1201 }
1202
1203 cp_if_changed(){
1204     cmp -s "$1" "$2" && { test "$quiet" != "yes" && echo "$2 is unchanged"; } && return
1205     mkdir -p "$(dirname $2)"
1206     cp -f "$1" "$2"
1207 }
1208
1209 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1210 # system-dependent things.
1211
1212 AVCODEC_COMPONENTS="
1213     bsfs
1214     decoders
1215     encoders
1216     hwaccels
1217     parsers
1218 "
1219
1220 AVDEVICE_COMPONENTS="
1221     indevs
1222     outdevs
1223 "
1224 AVFILTER_COMPONENTS="
1225     filters
1226 "
1227 AVFORMAT_COMPONENTS="
1228     demuxers
1229     muxers
1230     protocols
1231 "
1232
1233 AVRESAMPLE_COMPONENTS=""
1234 AVUTIL_COMPONENTS=""
1235
1236 COMPONENT_LIST="
1237     $AVCODEC_COMPONENTS
1238     $AVDEVICE_COMPONENTS
1239     $AVFILTER_COMPONENTS
1240     $AVFORMAT_COMPONENTS
1241     $AVRESAMPLE_COMPONENTS
1242     $AVUTIL_COMPONENTS
1243 "
1244
1245 EXAMPLE_LIST="
1246     decode_audio_example
1247     decode_video_example
1248     encode_audio_example
1249     encode_video_example
1250     filter_audio_example
1251     metadata_example
1252     output_example
1253     qsvdec_example
1254     transcode_aac_example
1255 "
1256
1257 # catchall list of things that require external libs to link
1258 EXTRALIBS_LIST="
1259     cpu_init
1260     cws2fws
1261 "
1262
1263 HWACCEL_LIBRARY_NONFREE_LIST="
1264     cuda
1265     libnpp
1266 "
1267 HWACCEL_LIBRARY_LIST="
1268     $HWACCEL_LIBRARY_NONFREE_LIST
1269     d3d11va
1270     dxva2
1271     libmfx
1272     mmal
1273     nvenc
1274     omx
1275     vaapi
1276     vda
1277     vdpau
1278 "
1279
1280 EXTERNAL_LIBRARY_GPL_LIST="
1281     libcdio
1282     libx264
1283     libx265
1284     libxavs
1285     libxvid
1286 "
1287
1288 EXTERNAL_LIBRARY_NONFREE_LIST="
1289     libfaac
1290     libfdk_aac
1291     openssl
1292 "
1293
1294 EXTERNAL_LIBRARY_VERSION3_LIST="
1295     libopencore_amrnb
1296     libopencore_amrwb
1297     libvo_aacenc
1298     libvo_amrwbenc
1299 "
1300
1301 EXTERNAL_LIBRARY_LIST="
1302     $EXTERNAL_LIBRARY_GPL_LIST
1303     $EXTERNAL_LIBRARY_NONFREE_LIST
1304     $EXTERNAL_LIBRARY_VERSION3_LIST
1305     avisynth
1306     avxsynth
1307     frei0r
1308     gnutls
1309     libbs2b
1310     libdc1394
1311     libdcadec
1312     libfontconfig
1313     libfreetype
1314     libgsm
1315     libhdcd
1316     libilbc
1317     libkvazaar
1318     libmp3lame
1319     libopencv
1320     libopenh264
1321     libopenjpeg
1322     libopus
1323     libpulse
1324     librtmp
1325     libschroedinger
1326     libsnappy
1327     libspeex
1328     libtheora
1329     libtwolame
1330     libvorbis
1331     libvpx
1332     libwavpack
1333     libwebp
1334     libxcb
1335     libxcb_shm
1336     libxcb_xfixes
1337 "
1338
1339 SYSTEM_LIBRARY_LIST="
1340     bzlib
1341     zlib
1342 "
1343
1344 FEATURE_LIST="
1345     gray
1346     hardcoded_tables
1347     omx_rpi
1348     runtime_cpudetect
1349     safe_bitstream_reader
1350     shared
1351     small
1352     sram
1353     static
1354     swscale_alpha
1355 "
1356
1357 LIBRARY_LIST="
1358     avcodec
1359     avdevice
1360     avfilter
1361     avformat
1362     avresample
1363     avutil
1364     swscale
1365 "
1366
1367 LICENSE_LIST="
1368     gpl
1369     nonfree
1370     version3
1371 "
1372
1373 PROGRAM_LIST="
1374     avconv
1375     avplay
1376     avprobe
1377 "
1378
1379 SUBSYSTEM_LIST="
1380     dct
1381     doc
1382     error_resilience
1383     faan
1384     fft
1385     lsp
1386     lzo
1387     mdct
1388     network
1389     rdft
1390 "
1391
1392 # COMPONENT_LIST needs to come last to ensure correct dependency checking
1393 CONFIG_LIST="
1394     $EXAMPLE_LIST
1395     $EXTERNAL_LIBRARY_LIST
1396     $HWACCEL_LIBRARY_LIST
1397     $FEATURE_LIST
1398     $LICENSE_LIST
1399     $LIBRARY_LIST
1400     $PROGRAM_LIST
1401     $SUBSYSTEM_LIST
1402     $SYSTEM_LIBRARY_LIST
1403     neon_clobber_test
1404     pic
1405     pod2man
1406     texi2html
1407     thumb
1408     valgrind_backtrace
1409     xmm_clobber_test
1410     $COMPONENT_LIST
1411 "
1412
1413 THREADS_LIST="
1414     pthreads
1415     w32threads
1416 "
1417
1418 ATOMICS_LIST="
1419     atomics_gcc
1420     atomics_suncc
1421     atomics_win32
1422 "
1423
1424 ARCH_LIST="
1425     aarch64
1426     alpha
1427     arm
1428     avr32
1429     avr32_ap
1430     avr32_uc
1431     bfin
1432     ia64
1433     m68k
1434     mips
1435     mips64
1436     parisc
1437     ppc
1438     ppc64
1439     s390
1440     sh4
1441     sparc
1442     sparc64
1443     tilegx
1444     tilepro
1445     tomi
1446     x86
1447     x86_32
1448     x86_64
1449 "
1450
1451 ARCH_EXT_LIST_ARM="
1452     armv5te
1453     armv6
1454     armv6t2
1455     armv8
1456     neon
1457     vfp
1458     vfpv3
1459 "
1460
1461 ARCH_EXT_LIST_X86_SIMD="
1462     amd3dnow
1463     amd3dnowext
1464     avx
1465     avx2
1466     fma3
1467     fma4
1468     mmx
1469     mmxext
1470     sse
1471     sse2
1472     sse3
1473     sse4
1474     sse42
1475     ssse3
1476     xop
1477 "
1478
1479 ARCH_EXT_LIST_PPC="
1480     altivec
1481     dcbzl
1482     ldbrx
1483     power8
1484     ppc4xx
1485     vsx
1486 "
1487
1488 ARCH_EXT_LIST_X86="
1489     $ARCH_EXT_LIST_X86_SIMD
1490     cpunop
1491     i686
1492 "
1493
1494 ARCH_EXT_LIST_MIPS="
1495     loongson
1496     mips32r1
1497     mips64r1
1498     mips32r2
1499     mips64r2
1500     mips32r6
1501     mips64r6
1502 "
1503
1504 ARCH_EXT_LIST="
1505     $ARCH_EXT_LIST_ARM
1506     $ARCH_EXT_LIST_MIPS
1507     $ARCH_EXT_LIST_PPC
1508     $ARCH_EXT_LIST_X86
1509     vis
1510 "
1511
1512 ARCH_FEATURES="
1513     aligned_stack
1514     fast_64bit
1515     fast_clz
1516     fast_cmov
1517     local_aligned_8
1518     local_aligned_16
1519     local_aligned_32
1520     simd_align_16
1521     simd_align_32
1522 "
1523
1524 BUILTIN_LIST="
1525     atomic_cas_ptr
1526     machine_rw_barrier
1527     MemoryBarrier
1528     mm_empty
1529     rdtsc
1530     sem_timedwait
1531     sync_val_compare_and_swap
1532 "
1533 HAVE_LIST_CMDLINE="
1534     inline_asm
1535     symver
1536     x86asm
1537 "
1538
1539 HAVE_LIST_PUB="
1540     bigendian
1541     fast_unaligned
1542 "
1543
1544 HEADERS_LIST="
1545     AVFoundation_AVFoundation_h
1546     alsa_asoundlib_h
1547     altivec_h
1548     arpa_inet_h
1549     cdio_paranoia_h
1550     cdio_paranoia_paranoia_h
1551     d3d11_h
1552     dispatch_dispatch_h
1553     dev_bktr_ioctl_bt848_h
1554     dev_bktr_ioctl_meteor_h
1555     dev_ic_bt8xx_h
1556     dev_video_bktr_ioctl_bt848_h
1557     dev_video_meteor_ioctl_meteor_h
1558     direct_h
1559     dlfcn_h
1560     dxva_h
1561     gsm_h
1562     io_h
1563     mach_mach_time_h
1564     machine_ioctl_bt848_h
1565     machine_ioctl_meteor_h
1566     malloc_h
1567     poll_h
1568     sndio_h
1569     soundcard_h
1570     stdatomic_h
1571     sys_mman_h
1572     sys_param_h
1573     sys_resource_h
1574     sys_select_h
1575     sys_soundcard_h
1576     sys_time_h
1577     sys_un_h
1578     sys_videoio_h
1579     unistd_h
1580     valgrind_valgrind_h
1581     windows_h
1582     winsock2_h
1583 "
1584
1585 INTRINSICS_LIST="
1586     intrinsics_neon
1587 "
1588
1589 MATH_FUNCS="
1590     atanf
1591     atan2f
1592     cbrtf
1593     cosf
1594     exp2
1595     exp2f
1596     expf
1597     isinf
1598     isnan
1599     ldexpf
1600     llrint
1601     llrintf
1602     log2
1603     log2f
1604     log10f
1605     lrint
1606     lrintf
1607     powf
1608     rint
1609     round
1610     roundf
1611     sinf
1612     trunc
1613     truncf
1614 "
1615
1616 SYSTEM_FUNCS="
1617     aligned_malloc
1618     clock_gettime
1619     closesocket
1620     CommandLineToArgvW
1621     CoTaskMemFree
1622     CryptGenRandom
1623     fcntl
1624     flt_lim
1625     fork
1626     getaddrinfo
1627     gethrtime
1628     getopt
1629     GetProcessAffinityMask
1630     GetProcessMemoryInfo
1631     GetProcessTimes
1632     getrusage
1633     GetSystemTimeAsFileTime
1634     gettimeofday
1635     gmtime_r
1636     inet_aton
1637     isatty
1638     jack_port_get_latency_range
1639     LoadLibrary
1640     localtime_r
1641     mach_absolute_time
1642     MapViewOfFile
1643     memalign
1644     mkstemp
1645     mmap
1646     mprotect
1647     nanosleep
1648     posix_memalign
1649     sched_getaffinity
1650     SetConsoleTextAttribute
1651     setmode
1652     setrlimit
1653     Sleep
1654     strerror_r
1655     sysconf
1656     sysctl
1657     usleep
1658     VirtualAlloc
1659 "
1660
1661 TOOLCHAIN_FEATURES="
1662     as_dn_directive
1663     as_fpu_directive
1664     as_func
1665     as_object_arch
1666     asm_mod_q
1667     attribute_may_alias
1668     attribute_packed
1669     blocks_extension
1670     ebp_available
1671     ebx_available
1672     gnu_as
1673     ibm_asm
1674     inline_asm_labels
1675     pragma_deprecated
1676     symver_asm_label
1677     symver_gnu_asm
1678     vfp_args
1679     xform_asm
1680     xmm_clobbers
1681 "
1682
1683 TYPES_LIST="
1684     CONDITION_VARIABLE_Ptr
1685     socklen_t
1686     struct_addrinfo
1687     struct_group_source_req
1688     struct_ip_mreq_source
1689     struct_ipv6_mreq
1690     struct_pollfd
1691     struct_rusage_ru_maxrss
1692     struct_sockaddr_in6
1693     struct_sockaddr_sa_len
1694     struct_sockaddr_storage
1695     struct_v4l2_frmivalenum_discrete
1696 "
1697
1698 HAVE_LIST="
1699     $ARCH_EXT_LIST
1700     $(add_suffix _external $ARCH_EXT_LIST)
1701     $(add_suffix _inline   $ARCH_EXT_LIST)
1702     $ARCH_FEATURES
1703     $BUILTIN_LIST
1704     $HAVE_LIST_CMDLINE
1705     $HAVE_LIST_PUB
1706     $HEADERS_LIST
1707     $INTRINSICS_LIST
1708     $MATH_FUNCS
1709     $SYSTEM_FUNCS
1710     $THREADS_LIST
1711     $TOOLCHAIN_FEATURES
1712     $TYPES_LIST
1713     dos_paths
1714     dxva2_lib
1715     libc_msvcrt
1716     MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
1717     sdl
1718     section_data_rel_ro
1719     threads
1720     vaapi_drm
1721     vaapi_x11
1722     vdpau_x11
1723 "
1724
1725 # options emitted with CONFIG_ prefix but not available on the command line
1726 CONFIG_EXTRA="
1727     aandcttables
1728     ac3dsp
1729     audio_frame_queue
1730     audiodsp
1731     blockdsp
1732     bswapdsp
1733     cabac
1734     dirac_parse
1735     dvprofile
1736     faandct
1737     faanidct
1738     fdctdsp
1739     flacdsp
1740     fmtconvert
1741     g722dsp
1742     gmp
1743     golomb
1744     gplv3
1745     h263dsp
1746     h264chroma
1747     h264dsp
1748     h264parse
1749     h264pred
1750     h264qpel
1751     hevc_ps
1752     hpeldsp
1753     huffman
1754     huffyuvdsp
1755     huffyuvencdsp
1756     idctdsp
1757     iirfilter
1758     imdct15
1759     intrax8
1760     iso_media
1761     ividsp
1762     jpegtables
1763     lgplv3
1764     libx262
1765     libxcb_shape
1766     lpc
1767     lzf
1768     me_cmp
1769     mpeg_er
1770     mpegaudio
1771     mpegaudiodsp
1772     mpegaudioheader
1773     mpegvideo
1774     mpegvideoenc
1775     mss34dsp
1776     pixblockdsp
1777     qpeldsp
1778     qsv
1779     qsvdec
1780     qsvenc
1781     rangecoder
1782     riffdec
1783     riffenc
1784     rtpdec
1785     rtpenc_chain
1786     rv34dsp
1787     sinewin
1788     snappy
1789     srtp
1790     startcode
1791     texturedsp
1792     texturedspenc
1793     tpeldsp
1794     vaapi_encode
1795     vc1dsp
1796     videodsp
1797     vp3dsp
1798     vp56dsp
1799     vp8dsp
1800     wma_freqs
1801     wmv2dsp
1802 "
1803
1804 CMDLINE_SELECT="
1805     $ARCH_EXT_LIST
1806     $CONFIG_LIST
1807     $HAVE_LIST_CMDLINE
1808     $THREADS_LIST
1809     asm
1810     cross_compile
1811     debug
1812     extra_warnings
1813     logging
1814     lto
1815     optimizations
1816     rpath
1817 "
1818
1819 PATHS_LIST="
1820     bindir
1821     datadir
1822     docdir
1823     incdir
1824     libdir
1825     mandir
1826     prefix
1827     shlibdir
1828 "
1829
1830 CMDLINE_SET="
1831     $PATHS_LIST
1832     ar
1833     arch
1834     as
1835     cc
1836     objcc
1837     cpu
1838     cross_prefix
1839     custom_allocator
1840     dep_cc
1841     env
1842     extra_version
1843     host_cc
1844     host_cflags
1845     host_extralibs
1846     host_ld
1847     host_ldflags
1848     host_os
1849     ignore_tests
1850     ld
1851     logfile
1852     malloc_prefix
1853     nm
1854     optflags
1855     pkg_config
1856     pkg_config_flags
1857     random_seed
1858     samples
1859     sysinclude
1860     sysroot
1861     target_exec
1862     target_os
1863     target_path
1864     target_samples
1865     toolchain
1866 "
1867
1868 CMDLINE_APPEND="
1869     extra_cflags
1870     extra_objcflags
1871     host_cppflags
1872 "
1873
1874 # code dependency declarations
1875
1876 # architecture extensions
1877
1878 armv5te_deps="arm"
1879 armv6_deps="arm"
1880 armv6t2_deps="arm"
1881 armv8_deps="aarch64"
1882 neon_deps_any="aarch64 arm"
1883 intrinsics_neon_deps="neon"
1884 vfp_deps_any="aarch64 arm"
1885 vfpv3_deps="vfp"
1886
1887 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1888
1889 altivec_deps="ppc"
1890 ppc4xx_deps="ppc"
1891 vsx_deps="altivec"
1892 power8_deps="vsx"
1893
1894 cpunop_deps="i686"
1895 x86_64_select="i686"
1896 x86_64_suggest="fast_cmov"
1897
1898 amd3dnow_deps="mmx"
1899 amd3dnowext_deps="amd3dnow"
1900 i686_deps="x86"
1901 mmx_deps="x86"
1902 mmxext_deps="mmx"
1903 sse_deps="mmxext"
1904 sse2_deps="sse"
1905 sse3_deps="sse2"
1906 ssse3_deps="sse3"
1907 sse4_deps="ssse3"
1908 sse42_deps="sse4"
1909 avx_deps="sse42"
1910 xop_deps="avx"
1911 fma3_deps="avx"
1912 fma4_deps="avx"
1913 avx2_deps="avx"
1914
1915 mmx_external_deps="x86asm"
1916 mmx_inline_deps="inline_asm"
1917 mmx_suggest="mmx_external mmx_inline"
1918
1919 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1920     eval dep=\$${ext}_deps
1921     eval ${ext}_external_deps='"${dep}_external"'
1922     eval ${ext}_inline_deps='"${dep}_inline"'
1923     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1924 done
1925
1926 aligned_stack_if_any="aarch64 ppc x86"
1927 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1928 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1929 fast_unaligned_if_any="aarch64 ppc x86"
1930 simd_align_16_if_any="altivec neon sse"
1931 simd_align_32_if_any="avx"
1932
1933 # system capabilities
1934 symver_if_any="symver_asm_label symver_gnu_asm"
1935 valgrind_backtrace_conflict="optimizations"
1936 valgrind_backtrace_deps="valgrind_valgrind_h"
1937
1938 # threading support
1939 atomics_gcc_if="sync_val_compare_and_swap"
1940 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1941 atomics_win32_if="MemoryBarrier"
1942 atomics_native_if_any="$ATOMICS_LIST"
1943 w32threads_deps="atomics_native"
1944 threads_if_any="$THREADS_LIST"
1945
1946 # subsystems
1947 dct_select="rdft"
1948 dirac_parse_select="golomb"
1949 error_resilience_select="me_cmp"
1950 faandct_deps="faan fdctdsp"
1951 faanidct_deps="faan idctdsp"
1952 h264dsp_select="startcode"
1953 hevc_ps_select="golomb"
1954 intrax8_select="blockdsp idctdsp"
1955 mdct_select="fft"
1956 rdft_select="fft"
1957 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1958 mpeg_er_select="error_resilience"
1959 mpegaudio_select="mpegaudiodsp mpegaudioheader"
1960 mpegaudiodsp_select="dct"
1961 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp mpeg_er videodsp"
1962 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1963 vc1dsp_select="h264chroma qpeldsp startcode"
1964
1965 # decoders / encoders
1966 aac_decoder_select="imdct15 mdct sinewin"
1967 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1968 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1969 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1970 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1971 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1972 adpcm_g722_decoder_select="g722dsp"
1973 adpcm_g722_encoder_select="g722dsp"
1974 aic_decoder_select="golomb idctdsp"
1975 alac_encoder_select="lpc"
1976 als_decoder_select="bswapdsp"
1977 amrnb_decoder_select="lsp"
1978 amrwb_decoder_select="lsp"
1979 amv_decoder_select="sp5x_decoder"
1980 ape_decoder_select="bswapdsp"
1981 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1982 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1983 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1984 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1985 atrac1_decoder_select="mdct sinewin"
1986 atrac3_decoder_select="mdct"
1987 atrac3p_decoder_select="mdct sinewin"
1988 bink_decoder_select="blockdsp hpeldsp"
1989 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1990 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1991 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1992 cllc_decoder_select="bswapdsp"
1993 comfortnoise_encoder_select="lpc"
1994 cook_decoder_select="audiodsp mdct sinewin"
1995 cscd_decoder_select="lzo"
1996 cscd_decoder_suggest="zlib"
1997 dca_decoder_select="fmtconvert mdct"
1998 dds_decoder_select="texturedsp"
1999 dnxhd_decoder_select="blockdsp idctdsp"
2000 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
2001 dvvideo_decoder_select="dvprofile idctdsp"
2002 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
2003 dxa_decoder_deps="zlib"
2004 dxv_decoder_select="lzf texturedsp"
2005 eac3_decoder_select="ac3_decoder"
2006 eac3_encoder_select="ac3_encoder"
2007 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
2008 eatgq_decoder_select="aandcttables idctdsp"
2009 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
2010 exr_decoder_deps="zlib"
2011 ffv1_decoder_select="rangecoder"
2012 ffv1_encoder_select="rangecoder"
2013 ffvhuff_decoder_select="huffyuv_decoder"
2014 ffvhuff_encoder_select="huffyuv_encoder"
2015 fic_decoder_select="golomb"
2016 flac_decoder_select="flacdsp"
2017 flac_encoder_select="bswapdsp flacdsp lpc"
2018 flashsv_decoder_deps="zlib"
2019 flashsv_encoder_deps="zlib"
2020 flashsv2_decoder_deps="zlib"
2021 flv_decoder_select="h263_decoder"
2022 flv_encoder_select="h263_encoder"
2023 fourxm_decoder_select="blockdsp bswapdsp"
2024 fraps_decoder_select="bswapdsp huffman"
2025 g2m_decoder_deps="zlib"
2026 g2m_decoder_select="blockdsp idctdsp jpegtables"
2027 h261_decoder_select="mpeg_er mpegvideo"
2028 h261_encoder_select="aandcttables mpegvideoenc"
2029 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
2030 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
2031 h263i_decoder_select="h263_decoder"
2032 h263p_encoder_select="h263_encoder"
2033 h264_decoder_select="cabac golomb h264chroma h264dsp h264parse h264pred h264qpel videodsp"
2034 h264_decoder_suggest="error_resilience"
2035 hap_decoder_select="snappy texturedsp"
2036 hap_encoder_deps="libsnappy"
2037 hap_encoder_select="texturedspenc"
2038 hevc_decoder_select="bswapdsp cabac hevc_ps videodsp"
2039 huffyuv_decoder_select="bswapdsp huffyuvdsp"
2040 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
2041 iac_decoder_select="imc_decoder"
2042 imc_decoder_select="bswapdsp fft mdct sinewin"
2043 indeo3_decoder_select="hpeldsp"
2044 indeo4_decoder_select="ividsp"
2045 indeo5_decoder_select="ividsp"
2046 interplay_video_decoder_select="hpeldsp"
2047 jpegls_decoder_select="mjpeg_decoder"
2048 jv_decoder_select="blockdsp"
2049 lagarith_decoder_select="huffyuvdsp"
2050 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
2051 magicyuv_decoder_select="huffyuvdsp"
2052 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2053 metasound_decoder_select="lsp mdct sinewin"
2054 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2055 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
2056 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
2057 mjpegb_decoder_select="mjpeg_decoder"
2058 mlp_decoder_select="mlp_parser"
2059 motionpixels_decoder_select="bswapdsp"
2060 mp1_decoder_select="mpegaudio"
2061 mp1float_decoder_select="mpegaudio"
2062 mp2_decoder_select="mpegaudio"
2063 mp2float_decoder_select="mpegaudio"
2064 mp3_decoder_select="mpegaudio"
2065 mp3adu_decoder_select="mpegaudio"
2066 mp3adufloat_decoder_select="mpegaudio"
2067 mp3float_decoder_select="mpegaudio"
2068 mp3on4_decoder_select="mpegaudio"
2069 mp3on4float_decoder_select="mpegaudio"
2070 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2071 mpc8_decoder_select="mpegaudiodsp"
2072 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2073 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2074 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2075 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2076 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2077 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2078 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2079 mpeg4_encoder_select="h263_encoder"
2080 msa1_decoder_select="mss34dsp"
2081 msmpeg4v1_decoder_select="h263_decoder"
2082 msmpeg4v2_decoder_select="h263_decoder"
2083 msmpeg4v2_encoder_select="h263_encoder"
2084 msmpeg4v3_decoder_select="h263_decoder"
2085 msmpeg4v3_encoder_select="h263_encoder"
2086 mss2_decoder_select="error_resilience mpeg_er mpegvideo qpeldsp vc1_decoder"
2087 mts2_decoder_select="mss34dsp"
2088 mxpeg_decoder_select="mjpeg_decoder"
2089 nellymoser_decoder_select="mdct sinewin"
2090 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2091 nuv_decoder_select="idctdsp lzo"
2092 on2avc_decoder_select="mdct"
2093 opus_decoder_deps="avresample"
2094 opus_decoder_select="imdct15"
2095 png_decoder_deps="zlib"
2096 png_encoder_deps="zlib"
2097 png_encoder_select="huffyuvencdsp"
2098 prores_decoder_select="idctdsp"
2099 prores_encoder_select="fdctdsp"
2100 qcelp_decoder_select="lsp"
2101 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2102 ra_144_encoder_select="audio_frame_queue lpc"
2103 ralf_decoder_select="golomb"
2104 rscc_decoder_deps="zlib"
2105 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2106 rv10_encoder_select="h263_encoder"
2107 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2108 rv20_encoder_select="h263_encoder"
2109 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2110 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2111 screenpresso_decoder_deps="zlib"
2112 sipr_decoder_select="lsp"
2113 sp5x_decoder_select="mjpeg_decoder"
2114 svq1_decoder_select="hpeldsp"
2115 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2116 svq3_decoder_select="golomb h264dsp h264parse h264pred hpeldsp tpeldsp videodsp"
2117 svq3_decoder_suggest="zlib"
2118 tak_decoder_select="audiodsp"
2119 tdsc_decoder_deps="zlib"
2120 tdsc_decoder_select="mjpeg_decoder"
2121 theora_decoder_select="vp3_decoder"
2122 thp_decoder_select="mjpeg_decoder"
2123 tiff_decoder_suggest="zlib"
2124 tiff_encoder_suggest="zlib"
2125 truehd_decoder_select="mlp_decoder"
2126 truemotion2_decoder_select="bswapdsp"
2127 truespeech_decoder_select="bswapdsp"
2128 tscc_decoder_deps="zlib"
2129 txd_decoder_select="texturedsp"
2130 twinvq_decoder_select="mdct lsp sinewin"
2131 utvideo_decoder_select="bswapdsp"
2132 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2133 vble_decoder_select="huffyuvdsp"
2134 vc1_decoder_select="blockdsp error_resilience h263_decoder h264qpel intrax8 mpeg_er mpegvideo vc1dsp"
2135 vc1image_decoder_select="vc1_decoder"
2136 vorbis_decoder_select="mdct"
2137 vorbis_encoder_select="mdct"
2138 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2139 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2140 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2141 vp6a_decoder_select="vp6_decoder"
2142 vp6f_decoder_select="vp6_decoder"
2143 vp7_decoder_select="h264pred videodsp vp8dsp"
2144 vp8_decoder_select="h264pred videodsp vp8dsp"
2145 vp9_decoder_select="videodsp vp9_superframe_split_bsf"
2146 webp_decoder_select="vp8_decoder"
2147 wmapro_decoder_select="mdct sinewin wma_freqs"
2148 wmav1_decoder_select="mdct sinewin wma_freqs"
2149 wmav1_encoder_select="mdct sinewin wma_freqs"
2150 wmav2_decoder_select="mdct sinewin wma_freqs"
2151 wmav2_encoder_select="mdct sinewin wma_freqs"
2152 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2153 wmv1_decoder_select="h263_decoder"
2154 wmv1_encoder_select="h263_encoder"
2155 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2156 wmv2_encoder_select="h263_encoder wmv2dsp"
2157 wmv3_decoder_select="vc1_decoder"
2158 wmv3image_decoder_select="wmv3_decoder"
2159 zerocodec_decoder_deps="zlib"
2160 zlib_decoder_deps="zlib"
2161 zlib_encoder_deps="zlib"
2162 zmbv_decoder_deps="zlib"
2163 zmbv_encoder_deps="zlib"
2164
2165 # hardware accelerators
2166 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2167 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2168 dxva2_lib_deps="dxva2"
2169 vda_deps="VideoDecodeAcceleration_VDADecoder_h blocks_extension pthreads"
2170 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2171
2172 h263_vaapi_hwaccel_deps="vaapi"
2173 h263_vaapi_hwaccel_select="h263_decoder"
2174 h264_d3d11va_hwaccel_deps="d3d11va"
2175 h264_d3d11va_hwaccel_select="h264_decoder"
2176 h264_dxva2_hwaccel_deps="dxva2"
2177 h264_dxva2_hwaccel_select="h264_decoder"
2178 h264_mmal_hwaccel_deps="mmal"
2179 h264_qsv_hwaccel_deps="libmfx"
2180 h264_vaapi_hwaccel_deps="vaapi"
2181 h264_vaapi_hwaccel_select="h264_decoder"
2182 h264_vda_hwaccel_deps="vda"
2183 h264_vda_hwaccel_select="h264_decoder"
2184 h264_vda_old_hwaccel_deps="vda"
2185 h264_vda_old_hwaccel_select="h264_decoder"
2186 h264_vdpau_hwaccel_deps="vdpau"
2187 h264_vdpau_hwaccel_select="h264_decoder"
2188 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2189 hevc_d3d11va_hwaccel_select="hevc_decoder"
2190 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2191 hevc_dxva2_hwaccel_select="hevc_decoder"
2192 hevc_qsv_hwaccel_deps="libmfx"
2193 hevc_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferHEVC"
2194 hevc_vaapi_hwaccel_select="hevc_decoder"
2195 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2196 hevc_vdpau_hwaccel_select="hevc_decoder"
2197 mpeg1_vdpau_hwaccel_deps="vdpau"
2198 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2199 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2200 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2201 mpeg2_dxva2_hwaccel_deps="dxva2"
2202 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2203 mpeg2_mmal_hwaccel_deps="mmal"
2204 mpeg2_qsv_hwaccel_deps="libmfx"
2205 mpeg2_vaapi_hwaccel_deps="vaapi"
2206 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2207 mpeg2_vdpau_hwaccel_deps="vdpau"
2208 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2209 mpeg4_vaapi_hwaccel_deps="vaapi"
2210 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2211 mpeg4_vdpau_hwaccel_deps="vdpau"
2212 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2213 vc1_d3d11va_hwaccel_deps="d3d11va"
2214 vc1_d3d11va_hwaccel_select="vc1_decoder"
2215 vc1_dxva2_hwaccel_deps="dxva2"
2216 vc1_dxva2_hwaccel_select="vc1_decoder"
2217 vc1_mmal_hwaccel_deps="mmal"
2218 vc1_qsv_hwaccel_deps="libmfx"
2219 vc1_vaapi_hwaccel_deps="vaapi"
2220 vc1_vaapi_hwaccel_select="vc1_decoder"
2221 vc1_vdpau_hwaccel_deps="vdpau"
2222 vc1_vdpau_hwaccel_select="vc1_decoder"
2223 vp8_qsv_hwaccel_deps="libmfx"
2224 vp8_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferVP8"
2225 vp8_vaapi_hwaccel_select="vp8_decoder"
2226 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2227 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2228 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2229 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2230
2231 # hardware-accelerated codecs
2232 nvenc_deps_any="libdl LoadLibrary"
2233 omx_deps="libdl pthreads"
2234 omx_rpi_select="omx"
2235 qsvdec_select="qsv"
2236 qsvenc_select="qsv"
2237 vaapi_encode_deps="vaapi"
2238
2239 hwupload_cuda_filter_deps="cuda"
2240 scale_npp_filter_deps="cuda libnpp"
2241
2242 h264_mmal_decoder_deps="mmal"
2243 h264_nvenc_encoder_deps="nvenc"
2244 h264_omx_encoder_deps="omx"
2245 h264_qsv_decoder_deps="libmfx"
2246 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
2247 h264_qsv_encoder_deps="libmfx"
2248 h264_qsv_encoder_select="qsvenc"
2249 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
2250 h264_vaapi_encoder_select="vaapi_encode golomb"
2251 hevc_nvenc_encoder_deps="nvenc"
2252 hevc_qsv_decoder_deps="libmfx"
2253 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser hevc_qsv_hwaccel qsvdec"
2254 hevc_qsv_encoder_deps="libmfx"
2255 hevc_qsv_encoder_select="hevc_ps qsvenc"
2256 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
2257 hevc_vaapi_encoder_select="vaapi_encode golomb"
2258 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
2259 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
2260 mpeg2_mmal_decoder_deps="mmal"
2261 mpeg2_qsv_decoder_deps="libmfx"
2262 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2263 mpeg2_qsv_encoder_deps="libmfx"
2264 mpeg2_qsv_encoder_select="qsvenc"
2265 mpeg2_vaapi_encoder_deps="VAEncPictureParameterBufferMPEG2"
2266 mpeg2_vaapi_encoder_select="vaapi_encode"
2267 mpeg4_omx_encoder_deps="omx"
2268 vc1_mmal_decoder_deps="mmal"
2269 vc1_qsv_decoder_deps="libmfx"
2270 vc1_qsv_decoder_select="qsvdec vc1_qsv_hwaccel vc1_parser"
2271 vp8_qsv_decoder_deps="libmfx"
2272 vp8_qsv_decoder_select="qsvdec vp8_qsv_hwaccel vp8_parser"
2273 vp8_vaapi_encoder_deps="VAEncPictureParameterBufferVP8"
2274 vp8_vaapi_encoder_select="vaapi_encode"
2275
2276 nvenc_h264_encoder_select="h264_nvenc_encoder"
2277 nvenc_hevc_encoder_select="hevc_nvenc_encoder"
2278
2279 # parsers
2280 h264_parser_select="golomb h264dsp h264parse"
2281 hevc_parser_select="hevc_ps"
2282 mpegaudio_parser_select="mpegaudioheader"
2283 mpegvideo_parser_select="mpegvideo"
2284 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2285 vc1_parser_select="vc1dsp"
2286
2287 # bitstream_filters
2288 mjpeg2jpeg_bsf_select="jpegtables"
2289
2290 # external libraries
2291 avisynth_deps="LoadLibrary"
2292 avxsynth_deps="libdl"
2293 avisynth_demuxer_deps_any="avisynth avxsynth"
2294 avisynth_demuxer_select="riffdec"
2295 libdcadec_decoder_deps="libdcadec"
2296 libfaac_encoder_deps="libfaac"
2297 libfaac_encoder_select="audio_frame_queue"
2298 libfdk_aac_decoder_deps="libfdk_aac"
2299 libfdk_aac_encoder_deps="libfdk_aac"
2300 libfdk_aac_encoder_select="audio_frame_queue"
2301 libgsm_decoder_deps="libgsm"
2302 libgsm_encoder_deps="libgsm"
2303 libgsm_ms_decoder_deps="libgsm"
2304 libgsm_ms_encoder_deps="libgsm"
2305 libilbc_decoder_deps="libilbc"
2306 libilbc_encoder_deps="libilbc"
2307 libkvazaar_encoder_deps="libkvazaar"
2308 libmp3lame_encoder_deps="libmp3lame"
2309 libmp3lame_encoder_select="audio_frame_queue mpegaudioheader"
2310 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2311 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2312 libopencore_amrnb_encoder_select="audio_frame_queue"
2313 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2314 libopenh264_decoder_deps="libopenh264"
2315 libopenh264_decoder_select="h264_mp4toannexb_bsf"
2316 libopenh264_encoder_deps="libopenh264"
2317 libopenjpeg_decoder_deps="libopenjpeg"
2318 libopenjpeg_encoder_deps="libopenjpeg"
2319 libopus_decoder_deps="libopus"
2320 libopus_encoder_deps="libopus"
2321 libopus_encoder_select="audio_frame_queue"
2322 libschroedinger_decoder_deps="libschroedinger"
2323 libschroedinger_encoder_deps="libschroedinger"
2324 libspeex_decoder_deps="libspeex"
2325 libspeex_encoder_deps="libspeex"
2326 libspeex_encoder_select="audio_frame_queue"
2327 libtheora_encoder_deps="libtheora"
2328 libtwolame_encoder_deps="libtwolame"
2329 libvo_aacenc_encoder_deps="libvo_aacenc"
2330 libvo_aacenc_encoder_select="audio_frame_queue"
2331 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2332 libvorbis_encoder_deps="libvorbis"
2333 libvorbis_encoder_select="audio_frame_queue"
2334 libvpx_vp8_decoder_deps="libvpx"
2335 libvpx_vp8_encoder_deps="libvpx"
2336 libvpx_vp9_decoder_deps="libvpx"
2337 libvpx_vp9_encoder_deps="libvpx"
2338 libwavpack_encoder_deps="libwavpack"
2339 libwavpack_encoder_select="audio_frame_queue"
2340 libwebp_encoder_deps="libwebp"
2341 libx262_encoder_deps="libx262"
2342 libx264_encoder_deps="libx264"
2343 libx265_encoder_deps="libx265"
2344 libxavs_encoder_deps="libxavs"
2345 libxvid_encoder_deps="libxvid mkstemp"
2346
2347 # demuxers / muxers
2348 ac3_demuxer_select="ac3_parser"
2349 asf_demuxer_select="riffdec"
2350 asf_muxer_select="riffenc"
2351 asf_stream_muxer_select="asf_muxer"
2352 avi_demuxer_select="iso_media riffdec"
2353 avi_muxer_select="riffenc"
2354 caf_demuxer_select="iso_media riffdec"
2355 dash_muxer_select="mp4_muxer"
2356 dirac_demuxer_select="dirac_parser"
2357 dv_demuxer_select="dvprofile"
2358 dv_muxer_select="dvprofile"
2359 dxa_demuxer_select="riffdec"
2360 eac3_demuxer_select="ac3_parser"
2361 f4v_muxer_select="mov_muxer"
2362 flac_demuxer_select="flac_parser"
2363 hds_muxer_select="flv_muxer"
2364 hls_muxer_select="mpegts_muxer"
2365 ipod_muxer_select="mov_muxer"
2366 ismv_muxer_select="mov_muxer"
2367 matroska_audio_muxer_select="matroska_muxer"
2368 matroska_demuxer_select="iso_media riffdec"
2369 matroska_demuxer_suggest="bzlib lzo zlib"
2370 matroska_muxer_select="iso_media riffenc"
2371 mmf_muxer_select="riffenc"
2372 mov_demuxer_select="iso_media riffdec"
2373 mov_demuxer_suggest="zlib"
2374 mov_muxer_select="iso_media riffenc rtpenc_chain"
2375 mp3_demuxer_select="mpegaudio_parser"
2376 mp3_muxer_select="mpegaudioheader"
2377 mp4_muxer_select="mov_muxer"
2378 mpegts_demuxer_select="iso_media"
2379 mpegts_muxer_select="adts_muxer latm_muxer"
2380 mpegtsraw_demuxer_select="mpegts_demuxer"
2381 mxf_d10_muxer_select="mxf_muxer"
2382 nut_muxer_select="riffenc"
2383 nuv_demuxer_select="riffdec"
2384 oga_muxer_select="ogg_muxer"
2385 ogg_demuxer_select="dirac_parse"
2386 opus_muxer_select="ogg_muxer"
2387 psp_muxer_select="mov_muxer"
2388 rtp_demuxer_select="sdp_demuxer"
2389 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2390 rtsp_demuxer_select="http_protocol rtpdec"
2391 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2392 sap_demuxer_select="sdp_demuxer"
2393 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2394 sdp_demuxer_select="rtpdec"
2395 smoothstreaming_muxer_select="ismv_muxer"
2396 spdif_muxer_select="aac_parser"
2397 spx_muxer_select="ogg_muxer"
2398 swf_demuxer_suggest="zlib"
2399 tak_demuxer_select="tak_parser"
2400 tg2_muxer_select="mov_muxer"
2401 tgp_muxer_select="mov_muxer"
2402 w64_demuxer_select="wav_demuxer"
2403 wav_demuxer_select="riffdec"
2404 wav_muxer_select="riffenc"
2405 webm_muxer_select="iso_media riffenc"
2406 wtv_demuxer_select="mpegts_demuxer riffdec"
2407 xmv_demuxer_select="riffdec"
2408 xwma_demuxer_select="riffdec"
2409
2410 # indevs / outdevs
2411 alsa_indev_deps="alsa"
2412 alsa_outdev_deps="alsa"
2413 avfoundation_indev_deps="AVFoundation_AVFoundation_h objc_arc pthreads"
2414 avfoundation_indev_extralibs="-framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia"
2415 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2416 dv1394_indev_deps="dv1394"
2417 dv1394_indev_select="dv_demuxer"
2418 fbdev_indev_deps="linux_fb_h"
2419 jack_indev_deps="jack"
2420 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
2421 libcdio_indev_deps="libcdio"
2422 libdc1394_indev_deps="libdc1394"
2423 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2424 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2425 pulse_indev_deps="libpulse"
2426 sndio_indev_deps="sndio"
2427 sndio_outdev_deps="sndio"
2428 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2429 vfwcap_indev_deps="vfw32 vfwcap_defines"
2430 xcbgrab_indev_deps="libxcb libxcb_shape"
2431 xcbgrab_indev_suggest="libxcb_shm libxcb_xfixes"
2432
2433 # protocols
2434 ffrtmpcrypt_protocol_conflict="librtmp_protocol"
2435 ffrtmpcrypt_protocol_deps_any="gmp openssl"
2436 ffrtmpcrypt_protocol_select="tcp_protocol"
2437 ffrtmphttp_protocol_conflict="librtmp_protocol"
2438 ffrtmphttp_protocol_select="http_protocol"
2439 gopher_protocol_select="network"
2440 http_protocol_select="tcp_protocol"
2441 httpproxy_protocol_select="tcp_protocol"
2442 https_protocol_select="tls_protocol"
2443 icecast_protocol_select="http_protocol"
2444 librtmp_protocol_deps="librtmp"
2445 librtmpe_protocol_deps="librtmp"
2446 librtmps_protocol_deps="librtmp"
2447 librtmpt_protocol_deps="librtmp"
2448 librtmpte_protocol_deps="librtmp"
2449 mmsh_protocol_select="http_protocol"
2450 mmst_protocol_select="network"
2451 rtmp_protocol_conflict="librtmp_protocol"
2452 rtmp_protocol_select="tcp_protocol"
2453 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2454 rtmps_protocol_conflict="librtmp_protocol"
2455 rtmps_protocol_select="tls_protocol"
2456 rtmpt_protocol_select="ffrtmphttp_protocol"
2457 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2458 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2459 rtp_protocol_select="udp_protocol"
2460 sctp_protocol_deps="struct_sctp_event_subscribe"
2461 sctp_protocol_select="network"
2462 srtp_protocol_select="rtp_protocol srtp"
2463 tcp_protocol_select="network"
2464 tls_gnutls_protocol_deps="gnutls"
2465 tls_gnutls_protocol_select="tcp_protocol"
2466 tls_openssl_protocol_conflict="tls_gnutls_protocol"
2467 tls_openssl_protocol_deps="openssl"
2468 tls_openssl_protocol_select="tcp_protocol"
2469 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2470 udp_protocol_select="network"
2471 unix_protocol_deps="sys_un_h"
2472 unix_protocol_select="network"
2473
2474 # filters
2475 asyncts_filter_deps="avresample"
2476 blackframe_filter_deps="gpl"
2477 boxblur_filter_deps="gpl"
2478 bs2b_filter_deps="libbs2b"
2479 cropdetect_filter_deps="gpl"
2480 deinterlace_qsv_filter_deps="libmfx"
2481 deinterlace_vaapi_filter_deps="vaapi"
2482 delogo_filter_deps="gpl"
2483 drawtext_filter_deps="libfreetype"
2484 drawtext_filter_suggest="libfontconfig"
2485 frei0r_filter_deps="frei0r libdl"
2486 frei0r_src_filter_deps="frei0r libdl"
2487 hdcd_filter_deps="libhdcd"
2488 hqdn3d_filter_deps="gpl"
2489 interlace_filter_deps="gpl"
2490 movie_filter_deps="avcodec avformat"
2491 ocv_filter_deps="libopencv"
2492 resample_filter_deps="avresample"
2493 scale_filter_deps="swscale"
2494 scale_qsv_filter_deps="libmfx"
2495 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2496
2497 # examples
2498 decode_audio_example_deps="avcodec avutil"
2499 decode_video_example_deps="avcodec avutil"
2500 encode_audio_example_deps="avcodec avutil"
2501 encode_video_example_deps="avcodec avutil"
2502 filter_audio_example_deps="avfilter avutil"
2503 metadata_example_deps="avformat avutil"
2504 output_example_deps="avcodec avformat avresample avutil swscale"
2505 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder"
2506 transcode_aac_example_deps="avcodec avformat avresample"
2507
2508 # EXTRALIBS_LIST
2509 cpu_init_extralibs="pthreads_extralibs"
2510 cws2fws_extralibs="zlib_extralibs"
2511
2512 # libraries, in linking order
2513 avcodec_deps="avutil"
2514 avcodec_select="null_bsf"
2515 avdevice_deps="avformat avcodec avutil"
2516 avfilter_deps="avutil"
2517 avformat_deps="avcodec avutil"
2518 avformat_suggest="network"
2519 avresample_deps="avutil"
2520 swscale_deps="avutil"
2521
2522 avcodec_extralibs="pthreads_extralibs libm_extralibs"
2523 avdevice_extralibs="libm_extralibs"
2524 avformat_extralibs="libm_extralibs"
2525 avfilter_extralibs="pthreads_extralibs libm_extralibs"
2526 avresample_extralibs="libm_extralibs"
2527 avutil_extralibs="clock_gettime_extralibs cuda_extralibs libm_extralibs libmfx_extralibs nanosleep_extralibs user32_extralibs vaapi_extralibs vaapi_drm_extralibs vaapi_x11_extralibs vdpau_x11_extralibs wincrypt_extralibs"
2528 swscale_extralibs="libm_extralibs"
2529
2530 # programs
2531 avconv_deps="avcodec avfilter avformat avresample swscale"
2532 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2533                fps_filter null_filter resample_filter scale_filter
2534                trim_filter"
2535 avconv_suggest="dxva2_lib ole32 psapi shell32"
2536 avplay_deps="avcodec avfilter avformat avresample sdl"
2537 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2538 avplay_suggest="shell32"
2539 avprobe_deps="avcodec avformat"
2540 avprobe_suggest="shell32"
2541
2542 # documentation
2543 pod2man_deps="doc"
2544 texi2html_deps="doc"
2545
2546 # default parameters
2547
2548 logfile="avbuild/config.log"
2549
2550 # installation paths
2551 prefix_default="/usr/local"
2552 bindir_default='${prefix}/bin'
2553 datadir_default='${prefix}/share/avconv'
2554 docdir_default='${prefix}/share/doc/libav'
2555 incdir_default='${prefix}/include'
2556 libdir_default='${prefix}/lib'
2557 mandir_default='${prefix}/share/man'
2558 shlibdir_default="$libdir_default"
2559
2560 # toolchain
2561 ar_default="ar"
2562 cc_default="gcc"
2563 host_cc_default="gcc"
2564 ln_s="ln -s -f"
2565 nm_default="nm -g"
2566 objformat="elf"
2567 pkg_config_default=pkg-config
2568 ranlib="ranlib"
2569 strip="strip"
2570 version_script='--version-script'
2571 x86asmexe="yasm"
2572
2573 # machine
2574 arch_default=$(uname -m)
2575 cpu="generic"
2576 intrinsics="none"
2577
2578 # OS
2579 target_os_default=$(tolower $(uname -s))
2580 host_os=$target_os_default
2581
2582 # configurable options
2583 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2584
2585 enable asm
2586 enable debug
2587 enable doc
2588 enable faan faandct faanidct
2589 enable optimizations
2590 enable safe_bitstream_reader
2591 enable static
2592 enable swscale_alpha
2593 enable valgrind_backtrace
2594
2595 # By default, enable only those hwaccels that have no external dependencies.
2596 enable d3d11va dxva2 vda vdpau
2597
2598 # internal components are enabled by default
2599 enable $EXTRALIBS_LIST
2600
2601 # Avoid external, non-system, libraries getting enabled by dependency resolution
2602 disable $EXTERNAL_LIBRARY_LIST
2603
2604 # build settings
2605 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2606 LIBPREF="lib"
2607 LIBSUF=".a"
2608 LIBNAME='$(LIBPREF)$(NAME)$(LIBSUF)'
2609 SLIBPREF="lib"
2610 SLIBSUF=".so"
2611 SLIBNAME='$(SLIBPREF)$(NAME)$(SLIBSUF)'
2612 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2613 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2614 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2615 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2616 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2617 VERSION_SCRIPT_POSTPROCESS_CMD="cat"
2618
2619 asflags_filter=echo
2620 cflags_filter=echo
2621 ldflags_filter=echo
2622
2623 AS_C='-c'
2624 AS_O='-o $@'
2625 CC_C='-c'
2626 CC_E='-E -o $@'
2627 CC_O='-o $@'
2628 OBJCC_C='-c'
2629 OBJCC_E='-E -o $@'
2630 OBJCC_O='-o $@'
2631 X86ASM_O='-o $@'
2632 LD_O='-o $@'
2633 LD_LIB='-l%'
2634 LD_PATH='-L'
2635 HOSTCC_C='-c'
2636 HOSTCC_E='-E -o $@'
2637 HOSTCC_O='-o $@'
2638 HOSTLD_O='-o $@'
2639
2640 host_extralibs='-lm'
2641 host_cflags_filter=echo
2642 host_ldflags_filter=echo
2643
2644 target_path='$(CURDIR)'
2645
2646 # since the object filename is not given with the -MM flag, the compiler
2647 # is only able to print the basename, and we must add the path ourselves
2648 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2649 DEPFLAGS='-MM'
2650
2651 mkdir -p avbuild
2652
2653 # find source path
2654 if test -f configure; then
2655     source_path=.
2656 else
2657     source_path=$(cd $(dirname "$0"); pwd)
2658     echo "$source_path" | grep -q '[[:blank:]]' &&
2659         die "Out of tree builds are impossible with whitespace in source path."
2660     test -e "$source_path/config.h" &&
2661         die "Out of tree builds are impossible with config.h in source dir."
2662 fi
2663
2664 for v in "$@"; do
2665     r=${v#*=}
2666     l=${v%"$r"}
2667     r=$(sh_quote "$r")
2668     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2669 done
2670
2671 find_things(){
2672     thing=$1
2673     pattern=$2
2674     file=$source_path/$3
2675     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2676 }
2677
2678 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2679 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2680 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2681 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2682 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2683 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2684 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2685 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2686 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2687
2688 find_things_extern(){
2689     thing=$1
2690     pattern=$2
2691     file=$source_path/$3
2692     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2693 }
2694
2695 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2696 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2697
2698 AVCODEC_COMPONENTS_LIST="
2699     $BSF_LIST
2700     $DECODER_LIST
2701     $ENCODER_LIST
2702     $HWACCEL_LIST
2703     $PARSER_LIST
2704 "
2705
2706 AVDEVICE_COMPONENTS_LIST="
2707     $INDEV_LIST
2708     $OUTDEV_LIST
2709 "
2710
2711 AVFILTER_COMPONENTS_LIST="
2712     $FILTER_LIST
2713 "
2714
2715 AVFORMAT_COMPONENTS_LIST="
2716     $DEMUXER_LIST
2717     $MUXER_LIST
2718     $PROTOCOL_LIST
2719 "
2720
2721 ALL_COMPONENTS="
2722     $AVCODEC_COMPONENTS_LIST
2723     $AVDEVICE_COMPONENTS_LIST
2724     $AVFILTER_COMPONENTS_LIST
2725     $AVFORMAT_COMPONENTS_LIST
2726 "
2727
2728 for n in $COMPONENT_LIST; do
2729     v=$(toupper ${n%s})_LIST
2730     eval enable \$$v
2731     eval ${n}_if_any="\$$v"
2732 done
2733
2734 enable $ARCH_EXT_LIST
2735
2736 die_unknown(){
2737     echo "Unknown option \"$1\"."
2738     echo "See $0 --help for available options."
2739     exit 1
2740 }
2741
2742 print_3_columns() {
2743     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2744 }
2745
2746 show_list() {
2747     suffix=_$1
2748     shift
2749     echo $* | sed s/$suffix//g | print_3_columns
2750     exit 0
2751 }
2752
2753 rand_list(){
2754     IFS=', '
2755     set -- $*
2756     unset IFS
2757     for thing; do
2758         comp=${thing%:*}
2759         prob=${thing#$comp}
2760         prob=${prob#:}
2761         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2762         echo "prob ${prob:-0.5}"
2763         printf '%s\n' $comp
2764     done
2765 }
2766
2767 do_random(){
2768     action=$1
2769     shift
2770     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2771     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2772 }
2773
2774 for opt do
2775     optval="${opt#*=}"
2776     case "$opt" in
2777         --extra-ldflags=*)
2778             add_ldflags $optval
2779         ;;
2780         --extra-ldexeflags=*)
2781             add_ldexeflags $optval
2782         ;;
2783         --extra-libs=*)
2784             add_extralibs $optval
2785         ;;
2786         --disable-devices)
2787             disable $INDEV_LIST $OUTDEV_LIST
2788         ;;
2789         --enable-debug=*)
2790             debuglevel="$optval"
2791         ;;
2792         --disable-programs)
2793             disable $PROGRAM_LIST
2794         ;;
2795         --disable-everything)
2796             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2797         ;;
2798         --disable-all)
2799             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2800             disable $LIBRARY_LIST $PROGRAM_LIST doc
2801         ;;
2802         --enable-random|--disable-random)
2803             action=${opt%%-random}
2804             do_random ${action#--} $COMPONENT_LIST
2805         ;;
2806         --enable-random=*|--disable-random=*)
2807             action=${opt%%-random=*}
2808             do_random ${action#--} $optval
2809         ;;
2810         --enable-*=*|--disable-*=*)
2811             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2812             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2813             eval list=\$$(toupper $thing)_LIST
2814             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2815             $action $(filter "$name" $list)
2816         ;;
2817         --enable-avserver|--disable-avserver*)
2818             warn "avserver has been removed, the ${opt} option is only"\
2819                  "provided for compatibility and will be removed in the future"
2820         ;;
2821         --enable-yasm|--disable-yasm)
2822             warn "The ${opt} option is only provided for compatibility and will be\n"\
2823                  "removed in the future. Use --enable-x86asm / --disable-x86asm instead."
2824             test $opt = --enable-yasm && x86asm=yes || x86asm=no
2825         ;;
2826         --enable-?*|--disable-?*)
2827             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2828             if is_in $option $COMPONENT_LIST; then
2829                 test $action = disable && action=unset
2830                 eval $action \$$(toupper ${option%s})_LIST
2831             elif is_in $option $CMDLINE_SELECT; then
2832                 $action $option
2833             else
2834                 die_unknown $opt
2835             fi
2836         ;;
2837         --list-*)
2838             NAME="${opt#--list-}"
2839             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2840             NAME=${NAME%s}
2841             eval show_list $NAME \$$(toupper $NAME)_LIST
2842         ;;
2843         --help|-h) show_help
2844         ;;
2845         --quiet|-q) quiet=yes
2846         ;;
2847         *)
2848             optname="${opt%%=*}"
2849             optname="${optname#--}"
2850             optname=$(echo "$optname" | sed 's/-/_/g')
2851             if is_in $optname $CMDLINE_SET; then
2852                 eval $optname='$optval'
2853             elif is_in $optname $CMDLINE_APPEND; then
2854                 append $optname "$optval"
2855             else
2856                 die_unknown $opt
2857             fi
2858         ;;
2859     esac
2860 done
2861
2862 for e in $env; do
2863     eval "export $e"
2864 done
2865
2866 disabled logging && logfile=/dev/null
2867
2868 # Die early if licensing-related configure options are incompatible.
2869 die_license_disabled() {
2870     enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
2871 }
2872
2873 map "die_license_disabled gpl"      $EXTERNAL_LIBRARY_GPL_LIST
2874 map "die_license_disabled nonfree"  $EXTERNAL_LIBRARY_NONFREE_LIST $HWACCEL_LIBRARY_NONFREE_LIST
2875 map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST
2876
2877 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
2878
2879 # Disable all the library-specific components if the library itself
2880 # is disabled, see AVCODEC_LIST and following _LIST variables.
2881
2882 disable_components(){
2883     disabled ${1} && disable $(
2884         eval components="\$$(toupper ${1})_COMPONENTS"
2885         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2886     )
2887 }
2888
2889 map 'disable_components $v' $LIBRARY_LIST
2890
2891 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2892 set >> $logfile
2893
2894 case "$toolchain" in
2895     *-asan)
2896         cc_default="${toolchain%-asan}"
2897         add_cflags  -fsanitize=address
2898         add_ldflags -fsanitize=address
2899     ;;
2900     *-msan)
2901         cc_default="${toolchain%-msan}"
2902         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2903         add_ldflags -fsanitize=memory
2904     ;;
2905     *-tsan)
2906         cc_default="${toolchain%-tsan}"
2907         add_cflags  -fsanitize=thread -fPIE
2908         add_ldflags -fsanitize=thread -pie
2909         case "$toolchain" in
2910             gcc-tsan)
2911                 add_cflags  -fPIC
2912                 add_ldflags -fPIC
2913                 ;;
2914         esac
2915     ;;
2916     *-usan)
2917         cc_default="${toolchain%-usan}"
2918         add_cflags  -fsanitize=undefined
2919         add_ldflags -fsanitize=undefined
2920         case "$toolchain" in
2921             clang-usan)
2922                 add_cflags -O1
2923                 ;;
2924         esac
2925     ;;
2926     valgrind-*)
2927         target_exec_default="valgrind"
2928         case "$toolchain" in
2929             valgrind-massif)
2930                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2931                 ;;
2932             valgrind-memcheck)
2933                 target_exec_args="--track-origins=yes --leak-check=full"
2934                 ;;
2935         esac
2936     ;;
2937     msvc)
2938         # Check whether the current MSVC version needs the C99 converter.
2939         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2940         # support enough of C99 to build libav. Default to the new
2941         # behaviour if the regexp was unable to match anything, since this
2942         # successfully parses the version number of existing supported
2943         # versions that require the converter (MSVC 2010 and 2012).
2944         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2945         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2946             cc_default="cl"
2947         else
2948             cc_default="c99wrap cl"
2949         fi
2950         ld_default="$source_path/compat/windows/mslink"
2951         nm_default="dumpbin -symbols"
2952         ar_default="lib"
2953         case "$arch" in
2954         arm*)
2955             as_default="armasm"
2956             ;;
2957         esac
2958         target_os_default="win32"
2959         # Use a relative path for TMPDIR. This makes sure all the
2960         # ffconf temp files are written with a relative path, avoiding
2961         # issues with msys/win32 path conversion for MSVC parameters
2962         # such as -Fo<file> or -out:<file>.
2963         TMPDIR=.
2964     ;;
2965     icl)
2966         cc_default="icl"
2967         ld_default="xilink"
2968         nm_default="dumpbin -symbols"
2969         ar_default="xilib"
2970         target_os_default="win32"
2971         TMPDIR=.
2972     ;;
2973     gcov)
2974         add_cflags  -fprofile-arcs -ftest-coverage
2975         add_ldflags -fprofile-arcs -ftest-coverage
2976     ;;
2977     llvm-cov)
2978         add_cflags -fprofile-arcs -ftest-coverage
2979         add_ldflags --coverage
2980     ;;
2981     hardened)
2982         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2983         add_cflags   -fno-strict-overflow -fstack-protector-all
2984         add_ldflags  -Wl,-z,relro -Wl,-z,now
2985     ;;
2986     ?*)
2987         die "Unknown toolchain $toolchain"
2988     ;;
2989 esac
2990
2991 test -n "$cross_prefix" && enable cross_compile
2992
2993 if enabled cross_compile; then
2994     test -n "$arch" && test -n "$target_os" ||
2995         die "Must specify target arch (--arch) and OS (--target-os) when cross-compiling"
2996 fi
2997
2998 ar_default="${cross_prefix}${ar_default}"
2999 cc_default="${cross_prefix}${cc_default}"
3000 objcc_default="${cross_prefix}${objcc_default}"
3001 nm_default="${cross_prefix}${nm_default}"
3002 pkg_config_default="${cross_prefix}${pkg_config_default}"
3003 ranlib="${cross_prefix}${ranlib}"
3004 strip="${cross_prefix}${strip}"
3005
3006 sysinclude_default="${sysroot}/usr/include"
3007
3008 set_default arch cc pkg_config sysinclude target_exec target_os
3009 enabled cross_compile || host_cc_default=$cc
3010 set_default host_cc
3011
3012 if ! $pkg_config --version >/dev/null 2>&1; then
3013     warn "$pkg_config not found, library detection may fail."
3014     pkg_config=false
3015 fi
3016
3017 exesuf() {
3018     case $1 in
3019         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
3020     esac
3021 }
3022
3023 EXESUF=$(exesuf $target_os)
3024 HOSTEXESUF=$(exesuf $host_os)
3025
3026 # set temporary file name
3027 : ${TMPDIR:=$TEMPDIR}
3028 : ${TMPDIR:=$TMP}
3029 : ${TMPDIR:=/tmp}
3030
3031 if ! check_cmd mktemp -u XXXXXX; then
3032     # simple replacement for missing mktemp
3033     # NOT SAFE FOR GENERAL USE
3034     mktemp(){
3035         tmpname="${2%%XXX*}.${HOSTNAME}.${UID}.$$"
3036         echo "$tmpname"
3037         mkdir "$tmpname"
3038     }
3039 fi
3040
3041 AVTMPDIR=$(mktemp -d "${TMPDIR}/avconf.XXXXXXXX" 2> /dev/null) ||
3042     die "Unable to create temporary directory in $TMPDIR."
3043
3044 tmpfile(){
3045     tmp="${AVTMPDIR}/test"$2
3046     (set -C; exec > $tmp) 2> /dev/null ||
3047         die "Unable to create temporary file in $AVTMPDIR."
3048     eval $1=$tmp
3049 }
3050
3051 trap 'rm -rf -- "$AVTMPDIR"' EXIT
3052 trap 'exit 2' INT
3053
3054 tmpfile TMPASM .asm
3055 tmpfile TMPC   .c
3056 tmpfile TMPE   $EXESUF
3057 tmpfile TMPH   .h
3058 tmpfile TMPO   .o
3059 tmpfile TMPS   .S
3060 tmpfile TMPSH  .sh
3061 tmpfile TMPV   .ver
3062
3063 unset -f mktemp
3064
3065 chmod +x $TMPE
3066
3067 # make sure we can execute files in $TMPDIR
3068 cat > $TMPSH 2>> $logfile <<EOF
3069 #! /bin/sh
3070 EOF
3071 chmod +x $TMPSH >> $logfile 2>&1
3072 if ! $TMPSH >> $logfile 2>&1; then
3073     cat <<EOF
3074 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
3075 variable to another directory and make sure that it is not mounted noexec.
3076 EOF
3077     die "Sanity test failed."
3078 fi
3079
3080 armasm_flags(){
3081     for flag; do
3082         case $flag in
3083             # Filter out MSVC cl.exe options from cflags that shouldn't
3084             # be passed to gas-preprocessor
3085             -M[TD]*)                                            ;;
3086             *)                  echo $flag                      ;;
3087         esac
3088    done
3089 }
3090
3091 ccc_flags(){
3092     for flag; do
3093         case $flag in
3094             -std=c99)           echo -c99                       ;;
3095             -mcpu=*)            echo -arch ${flag#*=}           ;;
3096             -mieee)             echo -ieee                      ;;
3097             -O*|-fast)          echo $flag                      ;;
3098             -fno-math-errno)    echo -assume nomath_errno       ;;
3099             -g)                 echo -g3                        ;;
3100             -Wall)              echo -msg_enable level2         ;;
3101             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
3102             -Wl,*)              echo $flag                      ;;
3103             -f*|-W*)                                            ;;
3104             *)                  echo $flag                      ;;
3105         esac
3106    done
3107 }
3108
3109 cparser_flags(){
3110     for flag; do
3111         case $flag in
3112             -Wno-switch)             echo -Wno-switch-enum ;;
3113             -Wno-format-zero-length) ;;
3114             -Wdisabled-optimization) ;;
3115             -Wno-pointer-sign)       echo -Wno-other ;;
3116             *)                       echo $flag ;;
3117         esac
3118     done
3119 }
3120
3121 msvc_common_flags(){
3122     for flag; do
3123         case $flag in
3124             # In addition to specifying certain flags under the compiler
3125             # specific filters, they must be specified here as well or else the
3126             # generic catch all at the bottom will print the original flag.
3127             -Wall)                ;;
3128             -Wextra)              ;;
3129             -std=c99)             ;;
3130             # Common flags
3131             -fomit-frame-pointer) ;;
3132             -g)                   echo -Z7 ;;
3133             -fno-math-errno)      ;;
3134             -fno-common)          ;;
3135             -fno-signed-zeros)    ;;
3136             -fPIC)                ;;
3137             -mthumb)              ;;
3138             -march=*)             ;;
3139             -lz)                  echo zlib.lib ;;
3140             -lx264)               echo libx264.lib ;;
3141             -l*)                  echo ${flag#-l}.lib ;;
3142             -L*)                  echo -libpath:${flag#-L} ;;
3143             *)                    echo $flag ;;
3144         esac
3145     done
3146 }
3147
3148 msvc_flags(){
3149     msvc_common_flags "$@"
3150     for flag; do
3151         case $flag in
3152             -Wall)                echo -W3 -wd4018 -wd4146 -wd4244 -wd4305     \
3153                                        -wd4554 ;;
3154             -Wextra)              echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3155                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3156                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3157                                        -wd4273 -wd4554 -wd4701 -wd4703 ;;
3158         esac
3159     done
3160 }
3161
3162 icl_flags(){
3163     msvc_common_flags "$@"
3164     for flag; do
3165         case $flag in
3166             # Despite what Intel's documentation says -Wall, which is supported
3167             # on Windows, does enable remarks so disable them here.
3168             -Wall)                echo $flag -Qdiag-disable:remark ;;
3169             -std=c99)             echo -Qstd=c99 ;;
3170         esac
3171     done
3172 }
3173
3174 pgi_flags(){
3175     for flag; do
3176         case $flag in
3177             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3178             -fomit-frame-pointer) echo -Mnoframe ;;
3179             -g)                   echo -gopt ;;
3180             *)                    echo $flag ;;
3181         esac
3182     done
3183 }
3184
3185 suncc_flags(){
3186     for flag; do
3187         case $flag in
3188             -march=*|-mcpu=*)
3189                 case "${flag#*=}" in
3190                     native)                   echo -xtarget=native       ;;
3191                     v9|niagara)               echo -xarch=sparc          ;;
3192                     ultrasparc)               echo -xarch=sparcvis       ;;
3193                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3194                     i586|pentium)             echo -xchip=pentium        ;;
3195                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3196                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3197                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3198                     pentium4*)          echo -xtarget=pentium4           ;;
3199                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3200                     *-sse3)             echo -xarch=sse3                 ;;
3201                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3202                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3203                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3204                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3205                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3206                     k8|opteron|athlon64|athlon-fx)
3207                                                echo -xarch=sse2a         ;;
3208                     athlon*)                   echo -xarch=pentium_proa  ;;
3209                 esac
3210                 ;;
3211             -std=c99)             echo -xc99              ;;
3212             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3213             -fPIC)                echo -KPIC -xcode=pic32 ;;
3214             -W*,*)                echo $flag              ;;
3215             -f*-*|-W*|-mimpure-text)                      ;;
3216             -shared)              echo -G                 ;;
3217             *)                    echo $flag              ;;
3218         esac
3219     done
3220 }
3221
3222 tms470_flags(){
3223     for flag; do
3224         case $flag in
3225             -march=*|-mcpu=*)
3226                 case "${flag#*=}" in
3227                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3228                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3229                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3230                     armv6*|arm11*)          echo -mv=6   ;;
3231                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3232                                             echo -mv=5e  ;;
3233                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3234                 esac
3235                 ;;
3236             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3237             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3238             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3239             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3240             -msoft-float)   echo --float_support=vfplib       ;;
3241             -O[0-3]|-mf=*)  echo $flag                        ;;
3242             -g)             echo -g -mn                       ;;
3243             -pds=*)         echo $flag                        ;;
3244             -D*|-I*)        echo $flag                        ;;
3245             --gcc|--abi=*)  echo $flag                        ;;
3246             -me)            echo $flag                        ;;
3247         esac
3248     done
3249 }
3250
3251 probe_cc(){
3252     pfx=$1
3253     _cc=$2
3254
3255     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3256     unset _ld_o _ldflags _ld_lib _ld_path
3257     unset _depflags _DEPCMD _DEPFLAGS
3258     _flags_filter=echo
3259
3260     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3261         _type=llvm_gcc
3262         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3263         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3264         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3265         _cflags_speed='-O3'
3266         _cflags_size='-Os'
3267     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3268         _type=gcc
3269         gcc_version=$($_cc --version | head -n1)
3270         gcc_basever=$($_cc -dumpversion)
3271         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3272         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3273         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3274         if ! $_cc -dumpversion | grep -q '^2\.'; then
3275             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3276         fi
3277         _cflags_speed='-O3'
3278         _cflags_size='-Os'
3279     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3280         _type=icc
3281         _ident=$($_cc --version | head -n1)
3282         _depflags='-MMD'
3283         _cflags_speed='-O3'
3284         _cflags_size='-Os'
3285         _cflags_noopt='-O1'
3286     elif $_cc -v 2>&1 | grep -q xlc; then
3287         _type=xlc
3288         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3289         _cflags_speed='-O5'
3290         _cflags_size='-O5 -qcompact'
3291     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3292         _type=ccc
3293         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3294         _DEPFLAGS='-M'
3295         _cflags_speed='-fast'
3296         _cflags_size='-O1'
3297         _flags_filter=ccc_flags
3298     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3299         test -d "$sysroot" || die "No valid sysroot specified."
3300         _type=armcc
3301         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3302         armcc_conf="$PWD/armcc.conf"
3303         $_cc --arm_linux_configure                 \
3304              --arm_linux_config_file="$armcc_conf" \
3305              --configure_sysroot="$sysroot"        \
3306              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3307              die "Error creating armcc configuration file."
3308         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3309         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3310         as_default="${cross_prefix}gcc"
3311         _depflags='-MMD'
3312         _cflags_speed='-O3'
3313         _cflags_size='-Os'
3314     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3315         _type=tms470
3316         _ident=$($_cc -version | head -n1 | tr -s ' ')
3317         _flags='--gcc --abi=eabi -me'
3318         _cc_e='-ppl -fe=$@'
3319         _cc_o='-fe=$@'
3320         _depflags='-ppa -ppd=$(@:.o=.d)'
3321         _cflags_speed='-O3 -mf=5'
3322         _cflags_size='-O3 -mf=2'
3323         _flags_filter=tms470_flags
3324     elif $_cc -v 2>&1 | grep -q clang; then
3325         _type=clang
3326         _ident=$($_cc --version 2>/dev/null | head -n1)
3327         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3328         _cflags_speed='-O3'
3329         _cflags_size='-Os'
3330     elif $_cc -V 2>&1 | grep -q Sun; then
3331         _type=suncc
3332         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3333         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3334         _DEPFLAGS='-xM1 -xc99'
3335         _ldflags='-std=c99'
3336         _cflags_speed='-O5'
3337         _cflags_size='-O5 -xspace'
3338         _flags_filter=suncc_flags
3339     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3340         _type=pathscale
3341         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3342         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3343         _cflags_speed='-O2'
3344         _cflags_size='-Os'
3345         _flags_filter='filter_out -Wdisabled-optimization'
3346     elif $_cc -v 2>&1 | grep -q Open64; then
3347         _type=open64
3348         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3349         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3350         _cflags_speed='-O2'
3351         _cflags_size='-Os'
3352         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3353     elif $_cc -V 2>&1 | grep -q Portland; then
3354         _type=pgi
3355         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3356         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3357         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3358         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3359         _cflags_noopt="-O1"
3360         _flags_filter=pgi_flags
3361     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3362         _type=armasm
3363         _ident=$($_cc | head -n1)
3364         # 4509: "This form of conditional instruction is deprecated"
3365         _flags="-nologo -ignore 4509"
3366         _flags_filter=armasm_flags
3367     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3368         _type=msvc
3369         _ident=$($_cc 2>&1 | head -n1)
3370         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3371         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3372         _cflags_speed="-O2"
3373         _cflags_size="-O1"
3374         _cflags_noopt="-O1"
3375         if $_cc -nologo- 2>&1 | grep -q Linker; then
3376             _ld_o='-out:$@'
3377         else
3378             _ld_o='-Fe$@'
3379         fi
3380         _cc_o='-Fo$@'
3381         _cc_e='-P -Fi$@'
3382         _flags_filter=msvc_flags
3383         _ld_lib='lib%.a'
3384         _ld_path='-libpath:'
3385         _flags='-nologo'
3386     elif $_cc 2>&1 | grep -q Intel; then
3387         _type=icl
3388         _ident=$($_cc 2>&1 | head -n1)
3389         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3390         # Not only is O3 broken on 13.x+ but it is slower on all previous
3391         # versions (tested) as well.
3392         _cflags_speed="-O2"
3393         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3394         if $_cc 2>&1 | grep -q Linker; then
3395             _ld_o='-out:$@'
3396         else
3397             _ld_o='-Fe$@'
3398         fi
3399         _cc_o='-Fo$@'
3400         _cc_e='-P'
3401         _flags_filter=icl_flags
3402         _ld_lib='lib%.a'
3403         _ld_path='-libpath:'
3404         # -Qdiag-error to make icl error when seeing certain unknown arguments
3405         _flags='-nologo -Qdiag-error:4044,10157'
3406         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3407         # with MSVC which enables it by default.
3408         _cflags='-Qms0 -Qvec- -Qsimd- -GS'
3409     elif $_cc -? 2>/dev/null | grep -q 'LLVM.*Linker'; then
3410         # lld can emulate multiple different linkers; in ms link.exe mode,
3411         # the -? parameter gives the help output which contains an identifyable
3412         # string, while it gives an error in other modes.
3413         _type=lld-link
3414         # The link.exe mode doesn't have a switch for getting the version,
3415         # but we can force it back to gnu mode and get the version from there.
3416         _ident=$($_cc -flavor gnu --version 2>/dev/null)
3417         _ld_o='-out:$@'
3418         _flags_filter=msvc_flags
3419         _ld_lib='lib%.a'
3420         _ld_path='-libpath:'
3421     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3422         _type=cparser
3423         _ident=$($_cc --version | head -n1)
3424         _depflags='-MMD'
3425         _cflags_speed='-O4'
3426         _cflags_size='-O2'
3427         _flags_filter=cparser_flags
3428     fi
3429
3430     eval ${pfx}_type=\$_type
3431     eval ${pfx}_ident=\$_ident
3432 }
3433
3434 set_ccvars(){
3435     eval ${1}_C=\${_cc_c-\${${1}_C}}
3436     eval ${1}_E=\${_cc_e-\${${1}_E}}
3437     eval ${1}_O=\${_cc_o-\${${1}_O}}
3438
3439     if [ -n "$_depflags" ]; then
3440         eval ${1}_DEPFLAGS=\$_depflags
3441     else
3442         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3443         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3444         eval DEP${1}FLAGS=\$_flags
3445     fi
3446 }
3447
3448 probe_cc cc "$cc"
3449 cflags_filter=$_flags_filter
3450 cflags_speed=$_cflags_speed
3451 cflags_size=$_cflags_size
3452 cflags_noopt=$_cflags_noopt
3453 add_cflags $_flags $_cflags
3454 cc_ldflags=$_ldflags
3455 set_ccvars CC
3456
3457 probe_cc hostcc "$host_cc"
3458 host_cflags_filter=$_flags_filter
3459 host_cflags_speed=$_cflags_speed
3460 add_host_cflags  $_flags $_cflags
3461 set_ccvars HOSTCC
3462
3463 test -n "$cc_type" && enable $cc_type ||
3464     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3465
3466 : ${as_default:=$cc}
3467 : ${objcc_default:=$cc}
3468 : ${dep_cc_default:=$cc}
3469 : ${ld_default:=$cc}
3470 : ${host_ld_default:=$host_cc}
3471 set_default ar as objcc dep_cc ld host_ld
3472
3473 probe_cc as "$as"
3474 asflags_filter=$_flags_filter
3475 add_asflags $_flags $_cflags
3476 set_ccvars AS
3477
3478 probe_cc objcc "$objcc"
3479 objcflags_filter=$_flags_filter
3480 add_objcflags $_flags $_cflags
3481 set_ccvars OBJC
3482
3483 probe_cc ld "$ld"
3484 ldflags_filter=$_flags_filter
3485 add_ldflags $_flags $_ldflags
3486 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3487 LD_O=${_ld_o-$LD_O}
3488 LD_LIB=${_ld_lib-$LD_LIB}
3489 LD_PATH=${_ld_path-$LD_PATH}
3490
3491 probe_cc hostld "$host_ld"
3492 host_ldflags_filter=$_flags_filter
3493 add_host_ldflags $_flags $_ldflags
3494 HOSTLD_O=${_ld_o-$HOSTLD_O}
3495
3496 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3497     probe_cc depcc "$dep_cc"
3498     CCDEP=${_DEPCMD:-$DEPCMD}
3499     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3500     DEPCCFLAGS=$_flags
3501 fi
3502
3503 if $ar 2>&1 | grep -q Microsoft; then
3504     arflags="-nologo"
3505     ar_o='-out:$@'
3506 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3507     arflags="rq"
3508     ar_o='$@'
3509 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3510     arflags='-Xany -r -c'
3511     ar_o='$@'
3512 else
3513     arflags="rc"
3514     ar_o='$@'
3515 fi
3516
3517 add_cflags $extra_cflags
3518 add_objcflags $extra_objcflags
3519 add_asflags $extra_cflags
3520
3521 if test -n "$sysroot"; then
3522     case "$cc_type" in
3523         gcc|llvm_gcc|clang)
3524             add_cppflags --sysroot="$sysroot"
3525             add_ldflags --sysroot="$sysroot"
3526         ;;
3527         tms470)
3528             add_cppflags -I"$sysinclude"
3529             add_ldflags  --sysroot="$sysroot"
3530         ;;
3531     esac
3532 fi
3533
3534 if test "$cpu" = host; then
3535     enabled cross_compile &&
3536         die "--cpu=host makes no sense when cross-compiling."
3537
3538     case "$cc_type" in
3539         gcc|llvm_gcc)
3540             check_native(){
3541                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3542                 sed -n "/cc1.*$1=/{
3543                             s/.*$1=\\([^ ]*\\).*/\\1/
3544                             p
3545                             q
3546                         }" $TMPE
3547             }
3548             cpu=$(check_native -march || check_native -mcpu)
3549         ;;
3550     esac
3551
3552     test "${cpu:-host}" = host &&
3553         die "--cpu=host not supported with compiler $cc"
3554 fi
3555
3556 # Deal with common $arch aliases
3557 case "$arch" in
3558     aarch64|arm64)
3559         arch="aarch64"
3560     ;;
3561     arm*)
3562         arch="arm"
3563     ;;
3564     mips*|IP*)
3565         case "$arch" in
3566         *el)
3567             add_cppflags -EL
3568             add_ldflags -EL
3569         ;;
3570         *eb)
3571             add_cppflags -EB
3572             add_ldflags -EB
3573         ;;
3574         esac
3575         arch="mips"
3576     ;;
3577     parisc*|hppa*)
3578         arch="parisc"
3579     ;;
3580     "Power Macintosh"|ppc*|powerpc*)
3581         arch="ppc"
3582     ;;
3583     s390|s390x)
3584         arch="s390"
3585     ;;
3586     sh4|sh)
3587         arch="sh4"
3588     ;;
3589     sun4u|sparc*)
3590         arch="sparc"
3591     ;;
3592     tilegx|tile-gx)
3593         arch="tilegx"
3594     ;;
3595     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3596         arch="x86"
3597     ;;
3598 esac
3599
3600 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3601 enable $arch
3602
3603 # Add processor-specific flags
3604 if enabled aarch64; then
3605
3606     case $cpu in
3607         armv*)
3608             cpuflags="-march=$cpu"
3609         ;;
3610         *)
3611             cpuflags="-mcpu=$cpu"
3612         ;;
3613     esac
3614
3615 elif enabled alpha; then
3616
3617     cpuflags="-mcpu=$cpu"
3618
3619 elif enabled arm; then
3620
3621     check_arm_arch() {
3622         check_cpp_condition stddef.h \
3623             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3624             $cpuflags
3625     }
3626
3627     probe_arm_arch() {
3628         if   check_arm_arch 4;        then echo armv4
3629         elif check_arm_arch 4T;       then echo armv4t
3630         elif check_arm_arch 5;        then echo armv5
3631         elif check_arm_arch 5E;       then echo armv5e
3632         elif check_arm_arch 5T;       then echo armv5t
3633         elif check_arm_arch 5TE;      then echo armv5te
3634         elif check_arm_arch 5TEJ;     then echo armv5te
3635         elif check_arm_arch 6;        then echo armv6
3636         elif check_arm_arch 6J;       then echo armv6j
3637         elif check_arm_arch 6K;       then echo armv6k
3638         elif check_arm_arch 6Z;       then echo armv6z
3639         elif check_arm_arch 6ZK;      then echo armv6zk
3640         elif check_arm_arch 6T2;      then echo armv6t2
3641         elif check_arm_arch 7;        then echo armv7
3642         elif check_arm_arch 7A  7_A;  then echo armv7-a
3643         elif check_arm_arch 7S;       then echo armv7-a
3644         elif check_arm_arch 7R  7_R;  then echo armv7-r
3645         elif check_arm_arch 7M  7_M;  then echo armv7-m
3646         elif check_arm_arch 7EM 7E_M; then echo armv7-m
3647         elif check_arm_arch 8A  8_A;  then echo armv8-a
3648         fi
3649     }
3650
3651     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3652
3653     case $cpu in
3654         armv*)
3655             cpuflags="-march=$cpu"
3656             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3657         ;;
3658         *)
3659             cpuflags="-mcpu=$cpu"
3660             case $cpu in
3661                 cortex-a*)                               subarch=armv7a  ;;
3662                 cortex-r*)                               subarch=armv7r  ;;
3663                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3664                 arm11*)                                  subarch=armv6   ;;
3665                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3666                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3667                 *)                             subarch=$(probe_arm_arch) ;;
3668             esac
3669         ;;
3670     esac
3671
3672     case "$subarch" in
3673         armv5t*)    enable fast_clz                ;;
3674         armv[6-8]*) enable fast_clz fast_unaligned ;;
3675     esac
3676
3677 elif enabled avr32; then
3678
3679     case $cpu in
3680         ap7[02]0[0-2])
3681             subarch="avr32_ap"
3682             cpuflags="-mpart=$cpu"
3683         ;;
3684         ap)
3685             subarch="avr32_ap"
3686             cpuflags="-march=$cpu"
3687         ;;
3688         uc3[ab]*)
3689             subarch="avr32_uc"
3690             cpuflags="-mcpu=$cpu"
3691         ;;
3692         uc)
3693             subarch="avr32_uc"
3694             cpuflags="-march=$cpu"
3695         ;;
3696     esac
3697
3698 elif enabled bfin; then
3699
3700     cpuflags="-mcpu=$cpu"
3701
3702 elif enabled mips; then
3703
3704     cpuflags="-march=$cpu"
3705
3706 elif enabled ppc; then
3707
3708     disable ldbrx
3709
3710     case $(tolower $cpu) in
3711         601|ppc601|powerpc601)
3712             cpuflags="-mcpu=601"
3713             disable altivec
3714         ;;
3715         603*|ppc603*|powerpc603*)
3716             cpuflags="-mcpu=603"
3717             disable altivec
3718         ;;
3719         604*|ppc604*|powerpc604*)
3720             cpuflags="-mcpu=604"
3721             disable altivec
3722         ;;
3723         g3|75*|ppc75*|powerpc75*)
3724             cpuflags="-mcpu=750"
3725             disable altivec
3726         ;;
3727         g4|745*|ppc745*|powerpc745*)
3728             cpuflags="-mcpu=7450"
3729             disable vsx
3730         ;;
3731         74*|ppc74*|powerpc74*)
3732             cpuflags="-mcpu=7400"
3733             disable vsx
3734         ;;
3735         g5|970|ppc970|powerpc970)
3736             cpuflags="-mcpu=970"
3737             disable vsx
3738         ;;
3739         power[3-6]*)
3740             cpuflags="-mcpu=$cpu"
3741             disable vsx
3742         ;;
3743         power[7-8]*)
3744             cpuflags="-mcpu=$cpu"
3745             enable ldbrx
3746         ;;
3747         cell)
3748             cpuflags="-mcpu=cell"
3749             enable ldbrx
3750             disable vsx
3751         ;;
3752         e500mc)
3753             cpuflags="-mcpu=e500mc"
3754             disable altivec
3755         ;;
3756         e500v2)
3757             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3758             disable altivec
3759             disable dcbzl
3760         ;;
3761         e500)
3762             cpuflags="-mcpu=8540 -mhard-float"
3763             disable altivec
3764             disable dcbzl
3765         ;;
3766     esac
3767
3768 elif enabled sparc; then
3769
3770     case $cpu in
3771         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3772             cpuflags="-mcpu=$cpu"
3773         ;;
3774         ultrasparc*|niagara[234])
3775             cpuflags="-mcpu=$cpu"
3776         ;;
3777     esac
3778
3779 elif enabled x86; then
3780
3781     case $cpu in
3782         i[345]86|pentium)
3783             cpuflags="-march=$cpu"
3784             disable i686
3785             disable mmx
3786         ;;
3787         # targets that do NOT support nopl and conditional mov (cmov)
3788         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3789             cpuflags="-march=$cpu"
3790             disable i686
3791         ;;
3792         # targets that do support nopl and conditional mov (cmov)
3793         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3794             cpuflags="-march=$cpu"
3795             enable i686
3796             enable fast_cmov
3797         ;;
3798         # targets that do support conditional mov but on which it's slow
3799         pentium4|pentium4m|prescott|nocona)
3800             cpuflags="-march=$cpu"
3801             enable i686
3802             disable fast_cmov
3803         ;;
3804     esac
3805
3806 fi
3807
3808 if [ "$cpu" != generic ]; then
3809     add_cflags  $cpuflags
3810     add_asflags $cpuflags
3811     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3812 fi
3813
3814 # compiler sanity check
3815 check_exec <<EOF
3816 int main(void){ return 0; }
3817 EOF
3818 if test "$?" != 0; then
3819     echo "$cc is unable to create an executable file."
3820     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3821         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3822         echo "Only do this if you know what cross compiling means."
3823     fi
3824     die "C compiler test failed."
3825 fi
3826
3827 add_cppflags -D_ISOC99_SOURCE
3828
3829 # some compilers silently accept -std=c11, so we also need to check that the
3830 # version macro is defined properly
3831 check_cpp_condition stdlib.h  "__STDC_VERSION__ >= 201112L" -std=c11 &&
3832     add_cflags -std=c11 ||
3833     check_cflags -std=c99
3834
3835 check_cppflags -D_FILE_OFFSET_BITS=64
3836 check_cppflags -D_LARGEFILE_SOURCE
3837
3838 add_host_cppflags -D_ISOC99_SOURCE
3839 check_host_cflags -std=c99
3840 check_host_cflags -Wall
3841 check_host_cflags $host_cflags_speed
3842
3843 check_64bit(){
3844     arch32=$1
3845     arch64=$2
3846     expr=$3
3847     check_code cc "" "int test[2*($expr) - 1]" &&
3848         subarch=$arch64 || subarch=$arch32
3849 }
3850
3851 case "$arch" in
3852     aarch64|alpha|ia64)
3853         spic=$shared
3854     ;;
3855     mips)
3856         check_64bit mips mips64 '_MIPS_SIM > 1'
3857         spic=$shared
3858     ;;
3859     parisc)
3860         check_64bit parisc parisc64 'sizeof(void *) > 4'
3861         spic=$shared
3862     ;;
3863     ppc)
3864         check_64bit ppc ppc64 'sizeof(void *) > 4'
3865         spic=$shared
3866     ;;
3867     s390)
3868         check_64bit s390 s390x 'sizeof(void *) > 4'
3869         spic=$shared
3870     ;;
3871     sparc)
3872         check_64bit sparc sparc64 'sizeof(void *) > 4'
3873         spic=$shared
3874     ;;
3875     x86)
3876         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3877         if test "$subarch" = "x86_64"; then
3878             spic=$shared
3879         fi
3880     ;;
3881 esac
3882
3883 enable $subarch
3884 enabled spic && enable_weak pic
3885
3886 # OS specific
3887 case $target_os in
3888     aix)
3889         SHFLAGS=-shared
3890         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3891         enabled shared && add_ldflags -Wl,-brtl
3892         ;;
3893     android)
3894         disable symver
3895         enable section_data_rel_ro
3896         SLIB_INSTALL_NAME='$(SLIBNAME)'
3897         SLIB_INSTALL_LINKS=
3898         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3899         ;;
3900     haiku)
3901         prefix_default="/boot/common"
3902         network_extralibs="-lnetwork"
3903         host_extralibs=
3904         ;;
3905     sunos)
3906         SHFLAGS='-shared -Wl,-h,$$(@F)'
3907         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3908         network_extralibs="-lsocket -lnsl"
3909         # When using suncc to build, the Solaris linker will mark
3910         # an executable with each instruction set encountered by
3911         # the Solaris assembler.  As our libraries contain their own
3912         # guards for processor-specific code, instead suppress
3913         # generation of the HWCAPS ELF section on Solaris x86 only.
3914         enabled_all suncc x86 &&
3915             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3916             add_ldflags -Wl,-M,mapfile
3917         nm_default='nm -P -g'
3918         version_script='-M'
3919         VERSION_SCRIPT_POSTPROCESS_CMD='perl $(SRC_PATH)/compat/solaris/make_sunver.pl - $(OBJS)'
3920         ;;
3921     netbsd)
3922         disable symver
3923         oss_indev_extralibs="-lossaudio"
3924         oss_outdev_extralibs="-lossaudio"
3925         ;;
3926     openbsd|bitrig)
3927         disable symver
3928         SHFLAGS='-shared'
3929         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3930         SLIB_INSTALL_LINKS=
3931         oss_indev_extralibs="-lossaudio"
3932         oss_outdev_extralibs="-lossaudio"
3933         ;;
3934     dragonfly)
3935         disable symver
3936         ;;
3937     freebsd)
3938         ;;
3939     bsd/os)
3940         add_extralibs -lpoll -lgnugetopt
3941         ;;
3942     darwin)
3943         enabled ppc && add_asflags -force_cpusubtype_ALL
3944         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3945         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3946         add_ldflags -Wl,-dynamic,-search_paths_first
3947         SLIBSUF=".dylib"
3948         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME).$(LIBVERSION)$(SLIBSUF)'
3949         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME).$(LIBMAJOR)$(SLIBSUF)'
3950         objformat="macho"
3951         enabled x86_64 && objformat="macho64"
3952         enabled_any pic shared ||
3953             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3954         check_header dispatch/dispatch.h &&
3955             add_cppflags '-I\$(SRC_PATH)/compat/dispatch_semaphore'
3956         ;;
3957     msys*)
3958         die "Native MSYS builds are discouraged, please use the MINGW environment."
3959         ;;
3960     mingw32*|mingw64*)
3961         if test $target_os = "mingw32ce"; then
3962             disable network
3963         else
3964             target_os=mingw32
3965         fi
3966         LIBTARGET=i386
3967         if enabled x86_64; then
3968             LIBTARGET="i386:x86-64"
3969         elif enabled arm; then
3970             LIBTARGET=arm-wince
3971         fi
3972         check_ldflags -Wl,--nxcompat
3973         check_ldflags -Wl,--dynamicbase
3974         shlibdir_default="$bindir_default"
3975         SLIBPREF=""
3976         SLIBSUF=".dll"
3977         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3978         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3979         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3980         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3981         SLIB_INSTALL_LINKS=
3982         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3983         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3984         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3985         objformat="win32"
3986         dlltool="${cross_prefix}dlltool"
3987         ranlib=:
3988         enable dos_paths
3989         ;;
3990     win32|win64)
3991         disable symver
3992         if enabled shared; then
3993             # Link to the import library instead of the normal static library
3994             # for shared libs.
3995             LD_LIB='%.lib'
3996             # Cannot build both shared and static libs with MSVC or icl.
3997             disable static
3998         fi
3999         shlibdir_default="$bindir_default"
4000         SLIBPREF=""
4001         SLIBSUF=".dll"
4002         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
4003         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
4004         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
4005         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4006         SLIB_INSTALL_LINKS=
4007         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
4008         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
4009         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
4010         objformat="win32"
4011         ranlib=:
4012         enable dos_paths
4013         ;;
4014     cygwin*)
4015         target_os=cygwin
4016         shlibdir_default="$bindir_default"
4017         SLIBPREF="cyg"
4018         SLIBSUF=".dll"
4019         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
4020         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
4021         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4022         SLIB_INSTALL_LINKS=
4023         SLIB_INSTALL_EXTRA_LIB='lib$(NAME).dll.a'
4024         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(NAME).dll.a'
4025         objformat="win32"
4026         enable dos_paths
4027         ;;
4028     *-dos|freedos|opendos)
4029         network_extralibs="-lsocket"
4030         objformat="coff"
4031         enable dos_paths
4032         add_cppflags -U__STRICT_ANSI__
4033         ;;
4034     linux)
4035         enable dv1394
4036         enable section_data_rel_ro
4037         ;;
4038     irix*)
4039         target_os=irix
4040         ranlib="echo ignoring ranlib"
4041         ;;
4042     os/2*)
4043         ln_s="cp -f"
4044         objformat="aout"
4045         add_cppflags -D_GNU_SOURCE
4046         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zhigh-mem -Zmap
4047         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
4048         LIBSUF="_s.a"
4049         SLIBPREF=""
4050         SLIBSUF=".dll"
4051         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
4052         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
4053         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
4054             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
4055             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
4056             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
4057             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
4058         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
4059             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
4060         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
4061         enable dos_paths
4062         ;;
4063     gnu/kfreebsd)
4064         add_cppflags -D_BSD_SOURCE
4065         ;;
4066     gnu)
4067         ;;
4068     qnx)
4069         add_cppflags -D_QNX_SOURCE
4070         network_extralibs="-lsocket"
4071         ;;
4072     symbian)
4073         SLIBSUF=".dll"
4074         enable dos_paths
4075         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
4076         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
4077         add_ldflags -Wl,--target1-abs,--no-undefined \
4078                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
4079                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
4080         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
4081                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
4082                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
4083         ;;
4084     osf1)
4085         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
4086         ;;
4087     minix)
4088         ;;
4089     none)
4090         ;;
4091     *)
4092         die "Unknown OS '$target_os'."
4093         ;;
4094 esac
4095
4096 # determine libc flavour
4097
4098 probe_libc(){
4099     pfx=$1
4100     pfx_no_=${pfx%_}
4101     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
4102     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
4103         eval ${pfx}libc_type=uclibc
4104         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4105     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
4106         eval ${pfx}libc_type=glibc
4107         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4108     # MinGW headers can be installed on Cygwin, so check for newlib first.
4109     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
4110         eval ${pfx}libc_type=newlib
4111         add_${pfx}cppflags -U__STRICT_ANSI__ -D_XOPEN_SOURCE=600
4112     # MinGW64 is backwards compatible with MinGW32, so check for it first.
4113     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
4114         eval ${pfx}libc_type=mingw64
4115         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4116         eval test \$${pfx_no_}cc_type = "gcc" &&
4117             add_${pfx}cppflags -D__printf__=__gnu_printf__
4118     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
4119          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
4120         eval ${pfx}libc_type=mingw32
4121         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
4122             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
4123             die "ERROR: MinGW32 runtime version must be >= 3.15."
4124         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4125         check_${pfx}cpp_condition _mingw.h "__MSVCRT_VERSION__ < 0x0700__" &&
4126             add_${pfx}cppflags -D__MSVCRT_VERSION__=0x0700
4127         eval test \$${pfx_no_}cc_type = "gcc" &&
4128             add_${pfx}cppflags -D__printf__=__gnu_printf__
4129     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
4130         eval ${pfx}libc_type=msvcrt
4131         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
4132             if [ "$pfx" = host_ ]; then
4133                 add_host_cppflags -Dsnprintf=_snprintf
4134             else
4135                 add_compat strtod.o strtod=avpriv_strtod
4136                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
4137                                              _snprintf=avpriv_snprintf  \
4138                                              vsnprintf=avpriv_vsnprintf
4139             fi
4140         fi
4141         add_${pfx}cppflags -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS
4142         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
4143         # 0x601 by default unless something else is set by the user.
4144         # This can easily lead to us detecting functions only present
4145         # in such new versions and producing binaries requiring windows 7.0.
4146         # Therefore explicitly set the default to XP unless the user has
4147         # set something else on the command line.
4148         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
4149         # family. For these cases, configure is free to use any functions
4150         # found in the SDK headers by default. (Alternatively, we could force
4151         # _WIN32_WINNT to 0x0602 in that case.)
4152         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
4153             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
4154 #ifdef WINAPI_FAMILY
4155 #include <winapifamily.h>
4156 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4157 #error not desktop
4158 #endif
4159 #endif
4160 EOF
4161         if [ "$pfx" = "" ]; then
4162             check_func strtoll || add_cflags -Dstrtoll=_strtoi64
4163         fi
4164     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4165         eval ${pfx}libc_type=klibc
4166     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4167         eval ${pfx}libc_type=bionic
4168     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4169         eval ${pfx}libc_type=solaris
4170         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4171     else
4172         eval ${pfx}libc_type=default
4173         add_${pfx}cppflags -D_DEFAULT_SOURCE
4174     fi
4175 }
4176
4177 probe_libc
4178 test -n "$libc_type" && enable libc_$libc_type
4179 probe_libc host_
4180 test -n "$host_libc_type" && enable host_libc_$host_libc_type
4181
4182 # hacks for compiler/libc/os combinations
4183
4184 case $libc_type in
4185     bionic)
4186         add_compat strtod.o strtod=avpriv_strtod
4187         ;;
4188     glibc)
4189         if enabled tms470; then
4190             CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4191             add_cppflags -D__USER_LABEL_PREFIX__=
4192             add_cppflags -D__builtin_memset=memset
4193             add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4194             add_cflags   -pds=48    # incompatible redefinition of macro
4195         elif enabled ccc; then
4196             add_ldflags -Wl,-z,now  # calls to libots crash without this
4197         fi
4198         ;;
4199 esac
4200
4201 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4202     add_cppflags '-I\$(SRC_PATH)/compat/float'
4203
4204 esc(){
4205     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4206 }
4207
4208 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" > avbuild/config.fate
4209
4210 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4211
4212 set_default $PATHS_LIST
4213 set_default nm
4214
4215 # we need to build at least one lib type
4216 if ! enabled_any static shared; then
4217     cat <<EOF
4218 At least one library type must be built.
4219 Specify --enable-static to build the static libraries or --enable-shared to
4220 build the shared libraries as well. To only build the shared libraries specify
4221 --disable-static in addition to --enable-shared.
4222 EOF
4223     exit 1
4224 fi
4225
4226 disabled optimizations || check_cflags -fomit-frame-pointer
4227
4228 enable_weak_pic() {
4229     disabled pic && return
4230     enable pic
4231     add_cppflags -DPIC
4232     case "$target_os" in
4233     mingw*|cygwin*)
4234         ;;
4235     *)
4236         add_cflags -fPIC
4237         ;;
4238     esac
4239     add_asflags  -fPIC
4240 }
4241
4242 enabled pic && enable_weak_pic
4243
4244 check_cc <<EOF || die "Symbol mangling check failed."
4245 int ff_extern;
4246 EOF
4247 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4248 extern_prefix=${sym%%ff_extern*}
4249
4250 check_inline_asm inline_asm '"" ::'
4251
4252 _restrict=
4253 for restrict_keyword in restrict __restrict__ __restrict; do
4254     check_cc <<EOF && _restrict=$restrict_keyword && break
4255 void foo(char * $restrict_keyword p);
4256 EOF
4257 done
4258
4259 check_cc <<EOF && enable pragma_deprecated
4260 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4261 EOF
4262
4263 check_cc <<EOF && enable attribute_packed
4264 struct { int x; } __attribute__((packed)) x;
4265 EOF
4266
4267 check_cc <<EOF && enable attribute_may_alias
4268 union { int x; } __attribute__((may_alias)) x;
4269 EOF
4270
4271 check_cc <<EOF || die "endian test failed"
4272 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4273 EOF
4274 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4275
4276 check_gas() {
4277     log "check_gas using '$as' as AS"
4278     # :vararg is used on aarch64, arm and ppc altivec
4279     check_as <<EOF || return 1
4280 .macro m n, y:vararg=0
4281 \n: .int \y
4282 .endm
4283 m x
4284 EOF
4285     # .altmacro is only used in arm asm
4286     ! enabled arm || check_as <<EOF || return 1
4287 .altmacro
4288 EOF
4289     enable gnu_as
4290     return 0
4291 }
4292
4293 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4294     nogas=:
4295     enabled_any arm aarch64 && nogas=die
4296     enabled_all ppc altivec && nogas=warn
4297     as_noop=-v
4298
4299     case $as_type in
4300         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4301         gcc)  gaspp_as_type=gas ;;
4302         *)    gaspp_as_type=$as_type ;;
4303     esac
4304
4305     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4306
4307     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4308         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4309
4310     if ! check_gas ; then
4311         as=${gas:=$as}
4312         check_gas || \
4313             $nogas "GNU assembler not found, install/update gas-preprocessor"
4314     fi
4315
4316     check_as <<EOF && enable as_func
4317 .func test
4318 .endfunc
4319 EOF
4320 fi
4321
4322 check_inline_asm inline_asm_labels '"1:\n"'
4323
4324 if enabled aarch64; then
4325     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4326     # internal assembler in clang 3.3 does not support this instruction
4327     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4328     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4329
4330     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4331
4332 elif enabled alpha; then
4333
4334     check_cflags -mieee
4335
4336 elif enabled arm; then
4337
4338     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4339     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4340     enabled thumb && check_cflags -mthumb || check_cflags -marm
4341
4342     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4343         enable vfp_args
4344     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4345         enable vfp_args
4346     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4347         case "${cross_prefix:-$cc}" in
4348             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4349             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4350 __asm__ (".eabi_attribute 28, 1");
4351 int main(void) { return 0; }
4352 EOF
4353         esac
4354         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4355     fi
4356
4357     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4358     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4359     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4360     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4361     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4362     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4363
4364     [ $target_os = linux ] || [ $target_os = android ] ||
4365         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4366             $ARCH_EXT_LIST_ARM
4367
4368     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4369
4370     check_as <<EOF && enable as_dn_directive
4371 ra .dn d0.i16
4372 .unreq ra
4373 EOF
4374     check_as <<EOF && enable as_fpu_directive
4375 .fpu neon
4376 EOF
4377
4378     # llvm's integrated assembler supports .object_arch from llvm 3.5
4379     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4380 .object_arch armv4
4381 EOF
4382
4383     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4384
4385 elif enabled mips; then
4386
4387     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4388
4389     # make sure that only an instruction set is enabled
4390     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4391
4392     if enabled mips64; then
4393         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4394             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4395                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4396     else
4397         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4398             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4399                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4400     fi
4401
4402 elif enabled parisc; then
4403
4404     if enabled gcc; then
4405         case $($cc -dumpversion) in
4406             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4407         esac
4408     fi
4409
4410 elif enabled ppc; then
4411
4412     enable local_aligned_8 local_aligned_16 local_aligned_32
4413
4414     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4415     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4416     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4417     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4418
4419     # AltiVec flags: The FSF version of GCC differs from the Apple version
4420     if enabled altivec; then
4421         check_cflags -maltivec -mabi=altivec &&
4422         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4423         check_cflags -faltivec
4424
4425         # check if our compiler supports Motorola AltiVec C API
4426         check_cc <<EOF || disable altivec
4427 $inc_altivec_h
4428 int main(void) {
4429     vector signed int v1 = (vector signed int) { 0 };
4430     vector signed int v2 = (vector signed int) { 1 };
4431     v1 = vec_add(v1, v2);
4432     return 0;
4433 }
4434 EOF
4435
4436         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4437     fi
4438
4439     if enabled vsx; then
4440         check_cflags -mvsx &&
4441         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4442     fi
4443
4444     if enabled power8; then
4445         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4446     fi
4447
4448 elif enabled x86; then
4449
4450     check_builtin rdtsc    intrin.h   "__rdtsc()"
4451     check_builtin mm_empty mmintrin.h "_mm_empty()"
4452
4453     enable local_aligned_8 local_aligned_16 local_aligned_32
4454
4455     # check whether EBP is available on x86
4456     # As 'i' is stored on the stack, this program will crash
4457     # if the base pointer is used to access it because the
4458     # base pointer is cleared in the inline assembly code.
4459     check_exec_crash <<EOF && enable ebp_available
4460 volatile int i=0;
4461 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4462 return i;
4463 EOF
4464
4465     # check whether EBX is available on x86
4466     check_inline_asm ebx_available '""::"b"(0)' &&
4467         check_inline_asm ebx_available '"":::"%ebx"'
4468
4469     # check whether xmm clobbers are supported
4470     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4471
4472     # check whether binutils is new enough to compile SSSE3/MMXEXT
4473     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4474     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4475
4476     if ! disabled_any asm mmx x86asm; then
4477         if check_cmd $x86asmexe --version; then
4478             enabled x86_64 && x86asm_extra="-m amd64"
4479             x86asm_debug="-g dwarf2"
4480             X86ASMDEP='$(DEPX86ASM) $(X86ASMFLAGS) -M $(X86ASM_O) $< > $(@:.o=.d)'
4481         elif check_cmd nasm -v; then
4482             x86asmexe=nasm
4483             x86asm_debug="-g -F dwarf"
4484             X86ASM_DEPFLAGS='-MD $(@:.o=.d)'
4485             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4486         fi
4487
4488         X86ASMFLAGS="-f $objformat $x86asm_extra"
4489         enabled pic               && append X86ASMFLAGS "-DPIC"
4490         test -n "$extern_prefix"  && append X86ASMFLAGS "-DPREFIX"
4491         case "$objformat" in
4492             elf*) enabled debug && append X86ASMFLAGS $x86asm_debug ;;
4493         esac
4494
4495         check_x86asm "movbe ecx, [5]" && enable x86asm ||
4496             die "yasm/nasm not found or too old. Use --disable-x86asm for a crippled build."
4497         check_x86asm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4498         check_x86asm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4499         check_x86asm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4500         check_x86asm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4501         check_x86asm "CPU amdnop"                      || disable cpunop
4502     fi
4503
4504     case "$cpu" in
4505         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4506             disable fast_clz
4507         ;;
4508     esac
4509
4510 fi
4511
4512 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4513
4514 check_ldflags -Wl,--as-needed
4515
4516 if ! disabled network; then
4517     check_func getaddrinfo $network_extralibs
4518     check_func inet_aton $network_extralibs
4519
4520     check_type netdb.h "struct addrinfo"
4521     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4522     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4523     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4524     check_type poll.h "struct pollfd"
4525     check_type netinet/sctp.h "struct sctp_event_subscribe"
4526     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4527     check_type netinet/in.h "struct sockaddr_in6"
4528     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4529     check_type "sys/types.h sys/socket.h" socklen_t
4530
4531     # Prefer arpa/inet.h over winsock2
4532     if check_header arpa/inet.h ; then
4533         check_func closesocket
4534     elif check_header winsock2.h ; then
4535         check_func_headers winsock2.h closesocket -lws2 &&
4536             network_extralibs="-lws2" ||
4537         { check_func_headers winsock2.h closesocket -lws2_32 &&
4538             network_extralibs="-lws2_32"; } || disable winsock2_h network
4539         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4540
4541         check_type ws2tcpip.h socklen_t
4542         check_type ws2tcpip.h "struct addrinfo"
4543         check_type ws2tcpip.h "struct group_source_req"
4544         check_type ws2tcpip.h "struct ip_mreq_source"
4545         check_type ws2tcpip.h "struct ipv6_mreq"
4546         check_type winsock2.h "struct pollfd"
4547         check_struct winsock2.h "struct sockaddr" sa_len
4548         check_type ws2tcpip.h "struct sockaddr_in6"
4549         check_type ws2tcpip.h "struct sockaddr_storage"
4550     else
4551         disable network
4552     fi
4553 fi
4554
4555 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4556 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4557 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4558 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4559
4560 case "$custom_allocator" in
4561     jemalloc)
4562         # jemalloc by default does not use a prefix
4563         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4564     ;;
4565     tcmalloc)
4566         require_pkg_config libtcmalloc libtcmalloc gperftools/tcmalloc.h tc_malloc
4567         malloc_prefix=tc_
4568     ;;
4569 esac
4570
4571 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4572 check_func  ${malloc_prefix}memalign            && enable memalign
4573 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4574
4575 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4576     check_func_headers time.h clock_gettime ||
4577         check_lib clock_gettime time.h clock_gettime -lrt
4578
4579 check_func  fcntl
4580 check_func  fork
4581 check_func  gethrtime
4582 check_func  getopt
4583 check_func  getrusage
4584 check_func  gettimeofday
4585 check_func  gmtime_r
4586 check_func  isatty
4587 check_func  localtime_r
4588 check_func  mach_absolute_time
4589 check_func  mkstemp
4590 check_func  mmap
4591 check_func  mprotect
4592 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4593 check_func_headers time.h nanosleep || check_lib nanosleep time.h nanosleep -lrt
4594 check_func  sched_getaffinity
4595 check_func  setrlimit
4596 check_func  strerror_r
4597 check_func  sysconf
4598 check_func  sysctl
4599 check_func  usleep
4600
4601 check_func_headers io.h setmode
4602 check_func_headers stdlib.h getenv
4603
4604 check_func_headers windows.h GetProcessAffinityMask
4605 check_func_headers windows.h GetProcessTimes
4606 check_func_headers windows.h GetSystemTimeAsFileTime
4607 check_func_headers windows.h LoadLibrary
4608 check_func_headers windows.h MapViewOfFile
4609 check_func_headers windows.h SetConsoleTextAttribute
4610 check_func_headers windows.h Sleep
4611 check_func_headers windows.h VirtualAlloc
4612 check_struct windows.h "CONDITION_VARIABLE" Ptr
4613
4614 check_header d3d11.h
4615 check_header direct.h
4616 check_header dlfcn.h
4617 check_header dxva.h
4618 check_header dxva2api.h
4619 check_header io.h
4620 check_header mach/mach_time.h
4621 check_header malloc.h
4622 check_header poll.h
4623 check_header sys/mman.h
4624 check_header sys/param.h
4625 check_header sys/resource.h
4626 check_header sys/select.h
4627 check_header sys/time.h
4628 check_header sys/un.h
4629 check_header unistd.h
4630 check_header valgrind/valgrind.h
4631 check_header VideoDecodeAcceleration/VDADecoder.h
4632 check_header windows.h
4633 check_header X11/extensions/XvMClib.h
4634
4635 # it seems there are versions of clang in some distros that try to use the
4636 # gcc headers, which explodes for stdatomic
4637 # so we also check that atomics actually work here
4638 check_builtin stdatomic_h stdatomic.h "atomic_int foo; atomic_store(&foo, 0)"
4639
4640 check_lib shell32  "windows.h shellapi.h" CommandLineToArgvW   -lshell32
4641 check_lib wincrypt "windows.h wincrypt.h" CryptGenRandom       -ladvapi32
4642 check_lib psapi    "windows.h psapi.h"    GetProcessMemoryInfo -lpsapi
4643
4644 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4645
4646 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4647 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4648 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4649
4650 check_type "va/va.h va/va_dec_hevc.h" "VAPictureParameterBufferHEVC"
4651 check_type "va/va.h va/va_dec_vp8.h" "VAPictureParameterBufferVP8"
4652 check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
4653 check_type "va/va.h va/va_enc_h264.h" "VAEncPictureParameterBufferH264"
4654 check_type "va/va.h va/va_enc_hevc.h" "VAEncPictureParameterBufferHEVC"
4655 check_type "va/va.h va/va_enc_jpeg.h" "VAEncPictureParameterBufferJPEG"
4656 check_type "va/va.h va/va_enc_mpeg2.h" "VAEncPictureParameterBufferMPEG2"
4657 check_type "va/va.h va/va_enc_vp8.h"  "VAEncPictureParameterBufferVP8"
4658
4659 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4660
4661 if ! disabled w32threads && ! enabled pthreads; then
4662     check_lib w32threads "windows.h process.h" _beginthreadex
4663 fi
4664
4665 # check for some common methods of building with pthread support
4666 # do this before the optional library checks as some of them require pthreads
4667 if ! disabled pthreads && ! enabled w32threads; then
4668     if check_lib pthreads pthread.h pthread_join -pthread; then
4669         add_cflags -pthread
4670     elif check_lib pthreads pthread.h pthread_join -pthreads; then
4671         add_cflags -pthreads
4672     elif check_lib pthreads pthread.h pthread_join -lpthreadGC2; then
4673         :
4674     elif check_lib pthreads pthread.h pthread_join -lpthread; then
4675         :
4676     elif check_func pthread_join; then
4677         enable pthreads
4678     fi
4679 fi
4680
4681 enabled pthreads &&
4682     check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwait(s,0); sem_destroy(s)"
4683
4684 disabled  zlib || check_lib  zlib  zlib.h      zlibVersion -lz
4685 disabled bzlib || check_lib bzlib bzlib.h BZ2_bzlibVersion -lbz2
4686
4687 # On some systems dynamic loading requires no extra linker flags
4688 check_lib libdl dlfcn.h dlopen || check_lib libdl dlfcn.h dlopen -ldl
4689
4690 check_lib libm math.h sin -lm
4691
4692 atan2f_args=2
4693 ldexpf_args=2
4694 powf_args=2
4695
4696 for func in $MATH_FUNCS; do
4697     eval check_mathfunc $func \${${func}_args:-1} $libm_extralibs
4698 done
4699
4700 # these are off by default, so fail if requested and not available
4701 enabled avisynth          && require_header avisynth/avisynth_c.h
4702 enabled avxsynth          && require_header avxsynth/avxsynth_c.h
4703 enabled cuda              && require cuda cuda.h cuInit -lcuda
4704 enabled frei0r            && require_header frei0r.h
4705 enabled gnutls            && require_pkg_config gnutls gnutls gnutls/gnutls.h gnutls_global_init
4706 enabled libbs2b           && require_pkg_config libbs2b libbs2b bs2b.h bs2b_open
4707 enabled libdc1394         && require_pkg_config libdc1394 libdc1394-2 dc1394/dc1394.h dc1394_new
4708 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4709 enabled libfaac           && require libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4710 enabled libfdk_aac        && require_pkg_config libfdk_aac fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4711 enabled libfontconfig     && require_pkg_config libfontconfig fontconfig "fontconfig/fontconfig.h" FcInit
4712 enabled libfreetype       && require_pkg_config libfreetype freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4713 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4714                                    check_lib libgsm "${gsm_hdr}" gsm_create -lgsm && break;
4715                                done || die "ERROR: libgsm not found"; }
4716 enabled libhdcd           && require_pkg_config libhdcd libhdcd "hdcd/hdcd_simple.h" hdcd_new
4717 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4718 enabled libkvazaar        && require_pkg_config libkvazaar "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4719 enabled libmfx            && require_pkg_config libmfx libmfx "mfx/mfxvideo.h" MFXInit
4720 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4721 enabled libnpp            && require libnpp npp.h nppGetLibVersion -lnppi -lnppc
4722 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4723 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4724 enabled libopencv         && require_pkg_config libopencv opencv opencv/cv.h cvCreateImageHeader
4725 enabled libopenh264       && require_pkg_config libopenh264 openh264 wels/codec_api.h WelsGetCodecVersion
4726 enabled libopenjpeg       && { check_lib libopenjpeg openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC ||
4727                                require_pkg_config libopenjpeg libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; }
4728 enabled libopus           && require_pkg_config libopus opus opus_multistream.h opus_multistream_decoder_create
4729 enabled libpulse          && require_pkg_config libpulse libpulse-simple pulse/simple.h pa_simple_new
4730 enabled librtmp           && require_pkg_config librtmp librtmp librtmp/rtmp.h RTMP_Socket
4731 enabled libschroedinger   && require_pkg_config libschroedinger schroedinger-1.0 schroedinger/schro.h schro_init
4732 enabled libsnappy         && require libsnappy snappy-c.h snappy_compress -lsnappy
4733 enabled libspeex          && require_pkg_config libspeex speex speex/speex.h speex_decoder_init -lspeex
4734 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4735 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4736 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4737 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4738 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4739 enabled libvpx            && require_pkg_config libvpx "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version &&
4740                              { enabled libvpx_vp8_decoder &&
4741                                    check_pkg_config libvpx_vp8_decoder vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx
4742                                enabled libvpx_vp8_encoder &&
4743                                    check_pkg_config libvpx_vp8_encoder vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx
4744                                enabled libvpx_vp9_decoder &&
4745                                    check_pkg_config libvpx_vp9_decoder vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx
4746                                enabled libvpx_vp9_encoder &&
4747                                    check_pkg_config libvpx_vp9_encoder vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx
4748                                disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder &&
4749                                    die "libvpx enabled but no supported decoders/encoders found"
4750                              }
4751 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4752 enabled libwebp           && require_pkg_config libwebp libwebp webp/encode.h WebPGetEncoderVersion
4753 enabled libx264           && require_pkg_config libx264 x264 "stdint.h x264.h" x264_encoder_encode &&
4754                              require_cpp_condition x264.h "X264_BUILD >= 118" &&
4755                              { check_cpp_condition x264.h "X264_MPEG2" &&
4756                                enable libx262; }
4757 enabled libx265           && require_pkg_config libx265 x265 x265.h x265_api_get &&
4758                              require_cpp_condition x265.h "X265_BUILD >= 57"
4759 enabled libxavs           && require libxavs "stdint.h xavs.h" xavs_encoder_encode -lxavs
4760 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4761 enabled mmal              && { check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4762                                { ! enabled cross_compile &&
4763                                  add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline &&
4764                                  add_ldflags -L/opt/vc/lib/ &&
4765                                  check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host; } ||
4766                                die "ERROR: mmal not found" &&
4767                                check_func_headers interface/mmal/mmal.h "MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS"; }
4768 enabled omx               && require_header OMX_Core.h
4769 enabled omx_rpi           && { check_header OMX_Core.h ||
4770                                { ! enabled cross_compile && add_cflags -isystem/opt/vc/include/IL && check_header OMX_Core.h ; } ||
4771                                die "ERROR: OpenMAX IL headers not found"; } && enable omx
4772 enabled openssl           && { { check_pkg_config openssl openssl openssl/ssl.h OPENSSL_init_ssl ||
4773                                  check_pkg_config openssl openssl openssl/ssl.h SSL_library_init; } ||
4774                                check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4775                                check_lib openssl openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4776                                check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4777                                die "ERROR: openssl not found"; }
4778
4779 enabled gnutls            && check_lib gmp gmp.h mpz_export -lgmp
4780
4781 if enabled nvenc; then
4782     require_header nvEncodeAPI.h
4783     require_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 6"
4784 fi
4785
4786 check_pkg_config sdl "sdl >= 1.2.1 sdl < 1.3.0" SDL_events.h SDL_PollEvent
4787
4788 ! disabled pod2man   && check_cmd pod2man --help     && enable pod2man   || disable pod2man
4789 ! disabled texi2html && check_cmd texi2html -version && enable texi2html || disable texi2html
4790
4791 check_header linux/fb.h
4792 check_header linux/videodev2.h
4793 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4794
4795 check_header AVFoundation/AVFoundation.h
4796
4797 check_header sys/videoio.h
4798
4799 check_lib user32 "windows.h winuser.h" GetShellWindow -luser32
4800 check_lib vfw32 "windows.h vfw.h" capCreateCaptureWindow -lvfw32
4801 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4802 # w32api 3.12 had it defined wrong
4803 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4804
4805 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4806 { check_header dev/bktr/ioctl_meteor.h &&
4807   check_header dev/bktr/ioctl_bt848.h; } ||
4808 { check_header machine/ioctl_meteor.h &&
4809   check_header machine/ioctl_bt848.h; } ||
4810 { check_header dev/video/meteor/ioctl_meteor.h &&
4811   check_header dev/video/bktr/ioctl_bt848.h; } ||
4812 check_header dev/ic/bt8xx.h
4813
4814 check_header sys/soundcard.h
4815 check_header soundcard.h
4816
4817 enabled_any alsa_indev alsa_outdev &&
4818     check_lib alsa alsa/asoundlib.h snd_pcm_htimestamp -lasound
4819
4820 enabled jack_indev && check_lib jack jack/jack.h jack_client_open -ljack &&
4821     check_func jack_port_get_latency_range -ljack
4822
4823 enabled_any sndio_indev sndio_outdev && check_lib sndio sndio.h sio_open -lsndio
4824
4825 if enabled libcdio; then
4826     check_lib libcdio "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4827     check_lib libcdio "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4828     die "ERROR: No usable libcdio/cdparanoia found"
4829 fi
4830
4831 if enabled libxcb; then
4832     require_pkg_config libxcb xcb xcb/xcb.h xcb_connect
4833     require_pkg_config libxcb_shape xcb-shape xcb/shape.h xcb_shape_rectangles
4834  &