configure: Check for -no_weak_imports in ldflags on macOS
[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   --x86asmexe=X86ASM       use x86 assembler X86ASM
272   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
273   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
274   --host-cc=HOSTCC         use host C compiler HOSTCC
275   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
276   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
277   --host-ld=HOSTLD         use host linker HOSTLD
278   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
279   --host-libs=HLIBS        use libs HLIBS when linking for host
280   --host-os=OS             compiler host OS [$target_os]
281   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
282   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
283   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
284   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
285   --extra-libs=ELIBS       add ELIBS [$ELIBS]
286   --extra-version=STRING   version string suffix []
287   --optflags=OPTFLAGS      override optimization-related compiler flags
288   --enable-pic             build position-independent code
289   --enable-thumb           compile for Thumb instruction set
290   --enable-lto             use link-time optimization
291   --env="ENV=override"     override the environment variables
292
293 Advanced options (experts only):
294   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
295   --custom-allocator=NAME  use a supported custom allocator
296   --disable-symver         disable symbol versioning
297   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
298   --disable-safe-bitstream-reader
299                            disable buffer boundary checking in bitreaders
300                            (faster, but may crash)
301   --enable-sram            allow use of on-chip SRAM
302
303 Optimization options (experts only):
304   --disable-asm            disable all assembly optimizations
305   --disable-altivec        disable AltiVec optimizations
306   --disable-vsx            disable VSX optimizations
307   --disable-power8         disable POWER8 optimizations
308   --disable-amd3dnow       disable 3DNow! optimizations
309   --disable-amd3dnowext    disable 3DNow! extended optimizations
310   --disable-mmx            disable MMX optimizations
311   --disable-mmxext         disable MMXEXT optimizations
312   --disable-sse            disable SSE optimizations
313   --disable-sse2           disable SSE2 optimizations
314   --disable-sse3           disable SSE3 optimizations
315   --disable-ssse3          disable SSSE3 optimizations
316   --disable-sse4           disable SSE4 optimizations
317   --disable-sse42          disable SSE4.2 optimizations
318   --disable-avx            disable AVX optimizations
319   --disable-xop            disable XOP optimizations
320   --disable-fma3           disable FMA3 optimizations
321   --disable-fma4           disable FMA4 optimizations
322   --disable-avx2           disable AVX2 optimizations
323   --disable-armv5te        disable armv5te optimizations
324   --disable-armv6          disable armv6 optimizations
325   --disable-armv6t2        disable armv6t2 optimizations
326   --disable-vfp            disable VFP optimizations
327   --disable-neon           disable NEON optimizations
328   --disable-inline-asm     disable use of inline assembly
329   --disable-x86asm         disable use of standalone x86 assembly
330
331 Developer options (useful when working on Libav itself):
332   --disable-debug          disable debugging symbols
333   --enable-debug=LEVEL     set the debug level [$debuglevel]
334   --disable-optimizations  disable compiler optimizations
335   --enable-extra-warnings  enable more compiler warnings
336   --samples=PATH           location of test samples for FATE, if not set use
337                            \$LIBAV_SAMPLES at make invocation time.
338   --enable-neon-clobber-test check NEON registers for clobbering (should be
339                            used only for debugging purposes)
340   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
341                            should be used only for debugging purposes)
342   --enable-random          randomly enable/disable components
343   --disable-random
344   --enable-random=LIST     randomly enable/disable specific components or
345   --disable-random=LIST    component groups. LIST is a comma-separated list
346                            of NAME[:PROB] entries where NAME is a component
347                            (group) and PROB the probability associated with
348                            NAME (default 0.5).
349   --random-seed=VALUE      seed value for --enable/disable-random
350   --disable-valgrind-backtrace do not print a backtrace under Valgrind
351                            (only applies to --disable-optimizations builds)
352   --ignore-tests=TESTS     comma-separated list (without "fate-" prefix
353                            in the name) of tests whose result is ignored
354
355 NOTE: Object files are built at the place where configure is launched.
356 EOF
357   exit 0
358 }
359
360 quotes='""'
361
362 log(){
363     echo "$@" >> $logfile
364 }
365
366 log_file(){
367     log BEGIN $1
368     i=1
369     while read line; do
370         printf '%5s   %s\n' "${i}" "${line}"
371         i=$(($i+1))
372     done < $1 >> $logfile
373     log END $1
374 }
375
376 echolog(){
377     log "$@"
378     echo "$@"
379 }
380
381 warn(){
382     log "WARNING: $*"
383     WARNINGS="${WARNINGS}WARNING: $*\n"
384 }
385
386 die(){
387     echolog "$@"
388     cat <<EOF
389
390 If you think configure made a mistake, make sure you are using the latest
391 version from Git.  If the latest version fails, report the problem to the
392 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
393 EOF
394     if disabled logging; then
395         cat <<EOF
396 Rerun configure with logging enabled (do not use --disable-logging), and
397 include the log this produces with your report.
398 EOF
399     else
400         cat <<EOF
401 Include the log file "$logfile" produced by configure as this will help
402 solving the problem.
403 EOF
404     fi
405     exit 1
406 }
407
408 # Avoid locale weirdness, besides we really just want to translate ASCII.
409 toupper(){
410     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
411 }
412
413 tolower(){
414     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
415 }
416
417 c_escape(){
418     echo "$*" | sed 's/["\\]/\\\0/g'
419 }
420
421 sh_quote(){
422     v=$(echo "$1" | sed "s/'/'\\\\''/g")
423     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
424     echo "$v"
425 }
426
427 cleanws(){
428     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
429 }
430
431 filter(){
432     pat=$1
433     shift
434     for v; do
435         eval "case $v in $pat) printf '%s ' $v ;; esac"
436     done
437 }
438
439 filter_out(){
440     pat=$1
441     shift
442     for v; do
443         eval "case $v in $pat) ;; *) printf '%s ' $v ;; esac"
444     done
445 }
446
447 map(){
448     m=$1
449     shift
450     for v; do eval $m; done
451 }
452
453 add_suffix(){
454     suffix=$1
455     shift
456     for v; do echo ${v}${suffix}; done
457 }
458
459 set_all(){
460     value=$1
461     shift
462     for var in $*; do
463         eval $var=$value
464     done
465 }
466
467 set_weak(){
468     value=$1
469     shift
470     for var; do
471         eval : \${$var:=$value}
472     done
473 }
474
475 sanitize_var_name(){
476     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
477 }
478
479 set_safe(){
480     var=$1
481     shift
482     eval $(sanitize_var_name "$var")='$*'
483 }
484
485 get_safe(){
486     eval echo \$$(sanitize_var_name "$1")
487 }
488
489 pushvar(){
490     for pvar in $*; do
491         eval level=\${${pvar}_level:=0}
492         eval ${pvar}_${level}="\$$pvar"
493         eval ${pvar}_level=$(($level+1))
494     done
495 }
496
497 popvar(){
498     for pvar in $*; do
499         eval level=\${${pvar}_level:-0}
500         test $level = 0 && continue
501         eval level=$(($level-1))
502         eval $pvar="\${${pvar}_${level}}"
503         eval ${pvar}_level=$level
504         eval unset ${pvar}_${level}
505     done
506 }
507
508 enable(){
509     set_all yes $*
510 }
511
512 disable(){
513     set_all no $*
514 }
515
516 enable_weak(){
517     set_weak yes $*
518 }
519
520 disable_weak(){
521     set_weak no $*
522 }
523
524 enable_safe(){
525     for var; do
526         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
527     done
528 }
529
530 disable_safe(){
531     for var; do
532         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
533     done
534 }
535
536 do_enable_deep(){
537     for var; do
538         enabled $var && continue
539         eval sel="\$${var}_select"
540         eval sgs="\$${var}_suggest"
541         pushvar var sgs
542         enable_deep $sel
543         popvar sgs
544         enable_deep_weak $sgs
545         popvar var
546     done
547 }
548
549 enable_deep(){
550     do_enable_deep $*
551     enable $*
552 }
553
554 enable_deep_weak(){
555     for var; do
556         disabled $var && continue
557         pushvar var
558         do_enable_deep $var
559         popvar var
560         enable_weak $var
561     done
562 }
563
564 enabled(){
565     test "${1#!}" = "$1" && op== || op=!=
566     eval test "x\$${1#!}" $op "xyes"
567 }
568
569 disabled(){
570     test "${1#!}" = "$1" && op== || op=!=
571     eval test "x\$${1#!}" $op "xno"
572 }
573
574 enabled_all(){
575     for opt; do
576         enabled $opt || return 1
577     done
578 }
579
580 disabled_all(){
581     for opt; do
582         disabled $opt || return 1
583     done
584 }
585
586 enabled_any(){
587     for opt; do
588         enabled $opt && return 0
589     done
590 }
591
592 disabled_any(){
593     for opt; do
594         disabled $opt && return 0
595     done
596     return 1
597 }
598
599 set_default(){
600     for opt; do
601         eval : \${$opt:=\$${opt}_default}
602     done
603 }
604
605 is_in(){
606     value=$1
607     shift
608     for var in $*; do
609         [ $var = $value ] && return 0
610     done
611     return 1
612 }
613
614 check_deps(){
615     for cfg; do
616         enabled ${cfg}_checking && die "Circular dependency for $cfg."
617         disabled ${cfg}_checking && continue
618         enable ${cfg}_checking
619         append allopts $cfg
620
621         eval dep_all="\$${cfg}_deps"
622         eval dep_any="\$${cfg}_deps_any"
623         eval dep_con="\$${cfg}_conflict"
624         eval dep_sel="\$${cfg}_select"
625         eval dep_sgs="\$${cfg}_suggest"
626         eval dep_ifa="\$${cfg}_if"
627         eval dep_ifn="\$${cfg}_if_any"
628
629         pushvar cfg dep_all dep_any dep_con dep_sel dep_sgs dep_ifa dep_ifn
630         check_deps $dep_all $dep_any $dep_con $dep_sel $dep_sgs $dep_ifa $dep_ifn
631         popvar cfg dep_all dep_any dep_con dep_sel dep_sgs dep_ifa dep_ifn
632
633         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
634         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
635         enabled_all  $dep_all || disable $cfg
636         enabled_any  $dep_any || disable $cfg
637         disabled_all $dep_con || disable $cfg
638         disabled_any $dep_sel && disable $cfg
639
640         if enabled $cfg; then
641             enable_deep $dep_sel
642             enable_deep_weak $dep_sgs
643             for dep in $dep_all $dep_any $dep_sgs; do
644                 # filter out library deps, these do not belong in extralibs
645                 is_in $dep $LIBRARY_LIST && continue
646                 enabled $dep && eval append ${cfg}_extralibs ${dep}_extralibs
647             done
648         fi
649
650         disable ${cfg}_checking
651     done
652 }
653
654 print_config(){
655     pfx=$1
656     files=$2
657     shift 2
658     map 'eval echo "$v \${$v:-no}"' "$@" |
659     awk "BEGIN { split(\"$files\", files) }
660         {
661             c = \"$pfx\" toupper(\$1);
662             v = \$2;
663             sub(/yes/, 1, v);
664             sub(/no/,  0, v);
665             for (f in files) {
666                 file = files[f];
667                 if (file ~ /\\.h\$/) {
668                     printf(\"#define %s %d\\n\", c, v) >>file;
669                 } else if (file ~ /\\.asm\$/) {
670                     printf(\"%%define %s %d\\n\", c, v) >>file;
671                 } else if (file ~ /\\.mak\$/) {
672                     n = -v ? \"\" : \"!\";
673                     printf(\"%s%s=yes\\n\", n, c) >>file;
674                 }
675             }
676         }"
677 }
678
679 print_enabled(){
680     suf=$1
681     shift
682     for v; do
683         enabled $v && printf "%s\n" ${v%$suf}
684     done
685 }
686
687 append(){
688     var=$1
689     shift
690     eval "$var=\"\$$var $*\""
691 }
692
693 prepend(){
694     var=$1
695     shift
696     eval "$var=\"$* \$$var\""
697 }
698
699 unique(){
700     var=$1
701     uniq_list=""
702     for tok in $(eval echo \$$var); do
703         uniq_list="$(filter_out $tok $uniq_list) $tok"
704     done
705     eval "$var=\"${uniq_list}\""
706 }
707
708 resolve(){
709     var=$1
710     tmpvar=
711     for entry in $(eval echo \$$var); do
712         tmpvar="$tmpvar $(eval echo \$${entry})"
713     done
714     eval "$var=\"${tmpvar}\""
715 }
716
717 add_cppflags(){
718     append CPPFLAGS "$@"
719 }
720
721 add_cflags(){
722     append CFLAGS $($cflags_filter "$@")
723 }
724
725 add_cflags_headers(){
726     append CFLAGS_HEADERS $($cflags_filter "$@")
727 }
728
729 add_asflags(){
730     append ASFLAGS $($asflags_filter "$@")
731 }
732
733 add_objcflags(){
734     append OBJCFLAGS $($objcflags_filter "$@")
735 }
736
737 add_ldflags(){
738     append LDFLAGS $($ldflags_filter "$@")
739 }
740
741 add_ldexeflags(){
742     append LDEXEFLAGS $($ldflags_filter "$@")
743 }
744
745 add_stripflags(){
746     append STRIPFLAGS "$@"
747 }
748
749 add_extralibs(){
750     prepend extralibs $($ldflags_filter "$@")
751 }
752
753 add_host_cppflags(){
754     append host_cppflags "$@"
755 }
756
757 add_host_cflags(){
758     append host_cflags $($host_cflags_filter "$@")
759 }
760
761 add_host_ldflags(){
762     append host_ldflags $($host_ldflags_filter "$@")
763 }
764
765 add_compat(){
766     append compat_objs $1
767     shift
768     map 'add_cppflags -D$v' "$@"
769 }
770
771 check_cmd(){
772     log "$@"
773     "$@" >> $logfile 2>&1
774 }
775
776 cc_o(){
777     eval printf '%s\\n' $CC_O
778 }
779
780 cc_e(){
781     eval printf '%s\\n' $CC_E
782 }
783
784 check_cc(){
785     log check_cc "$@"
786     cat > $TMPC
787     log_file $TMPC
788     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
789 }
790
791 check_objcc(){
792     log check_objcc "$@"
793     cat > $TMPC
794     log_file $TMPC
795     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
796 }
797
798 check_cpp(){
799     log check_cpp "$@"
800     cat > $TMPC
801     log_file $TMPC
802     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
803 }
804
805 as_o(){
806     eval printf '%s\\n' $AS_O
807 }
808
809 check_as(){
810     log check_as "$@"
811     cat > $TMPS
812     log_file $TMPS
813     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
814 }
815
816 check_inline_asm(){
817     log check_inline_asm "$@"
818     name="$1"
819     code="$2"
820     shift 2
821     disable $name
822     check_cc "$@" <<EOF && enable $name
823 void foo(void){ __asm__ volatile($code); }
824 EOF
825 }
826
827 check_insn(){
828     log check_insn "$@"
829     check_inline_asm ${1}_inline "\"$2\""
830     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
831 }
832
833 check_x86asm(){
834     log check_x86asm "$@"
835     echo "$1" > $TMPS
836     log_file $TMPS
837     shift 1
838     check_cmd $x86asmexe $X86ASMFLAGS "$@" -o $TMPO $TMPS
839 }
840
841 ld_o(){
842     eval printf '%s\\n' $LD_O
843 }
844
845 check_ld(){
846     log check_ld "$@"
847     flags=$(filter_out '-l*' "$@")
848     libs=$(filter '-l*' "$@")
849     check_cc $($cflags_filter $flags) || return
850     flags=$($ldflags_filter $flags)
851     libs=$($ldflags_filter $libs)
852     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
853 }
854
855 print_include(){
856     hdr=$1
857     test "${hdr%.h}" = "${hdr}" &&
858         echo "#include $hdr"    ||
859         echo "#include <$hdr>"
860 }
861
862 check_code(){
863     log check_code "$@"
864     check=$1
865     headers=$2
866     code=$3
867     shift 3
868     {
869         for hdr in $headers; do
870             print_include $hdr
871         done
872         echo "int main(void) { $code; return 0; }"
873     } | check_$check "$@"
874 }
875
876 check_cppflags(){
877     log check_cppflags "$@"
878     check_cpp "$@" <<EOF && append CPPFLAGS "$@"
879 #include <stdlib.h>;
880 EOF
881 }
882
883 test_cflags(){
884     log test_cflags "$@"
885     set -- $($cflags_filter "$@")
886     check_cc "$@" <<EOF
887 int x;
888 EOF
889 }
890
891 check_cflags(){
892     log check_cflags "$@"
893     test_cflags "$@" && add_cflags "$@"
894 }
895
896 test_objcflags(){
897     log test_objcflags "$@"
898     set -- $($objcflags_filter "$@")
899     check_objcc "$@" <<EOF
900 int x;
901 EOF
902 }
903
904 check_objcflags(){
905     log check_objcflags "$@"
906     test_objcflags "$@" && add_objcflags "$@"
907 }
908
909 test_ldflags(){
910     log test_ldflags "$@"
911     check_ld "$@" <<EOF
912 int main(void){ return 0; }
913 EOF
914 }
915
916 check_ldflags(){
917     log check_ldflags "$@"
918     test_ldflags "$@" && add_ldflags "$@"
919 }
920
921 test_stripflags(){
922     log test_stripflags "$@"
923     # call check_cc to get a fresh TMPO
924     check_cc <<EOF
925 int main(void) { return 0; }
926 EOF
927     check_cmd $strip $STRIPFLAGS "$@" $TMPO
928 }
929
930 check_stripflags(){
931     log check_stripflags "$@"
932     test_stripflags "$@" && add_stripflags "$@"
933 }
934
935 check_header(){
936     log check_header "$@"
937     header=$1
938     shift
939     disable_safe $header
940     check_cpp "$@" <<EOF && enable_safe $header
941 #include <$header>
942 int x;
943 EOF
944 }
945
946 check_func(){
947     log check_func "$@"
948     func=$1
949     shift
950     disable $func
951     check_ld "$@" <<EOF && enable $func
952 extern int $func();
953 int main(void){ $func(); }
954 EOF
955 }
956
957 check_mathfunc(){
958     log check_mathfunc "$@"
959     func=$1
960     narg=$2
961     shift 2
962     test $narg = 2 && args="f, g" || args="f"
963     disable $func
964     check_ld "$@" <<EOF && enable $func
965 #include <math.h>
966 float foo(float f, float g) { return $func($args); }
967 int main(void){ return 0; }
968 EOF
969 }
970
971 check_func_headers(){
972     log check_func_headers "$@"
973     headers=$1
974     funcs=$2
975     shift 2
976     {
977         for hdr in $headers; do
978             print_include $hdr
979         done
980         for func in $funcs; do
981             echo "long check_$func(void) { return (long) $func; }"
982         done
983         echo "int main(void) { return 0; }"
984     } | check_ld "$@" && enable $funcs && enable_safe $headers
985 }
986
987 check_cpp_condition(){
988     log check_cpp_condition "$@"
989     header=$1
990     condition=$2
991     shift 2
992     check_cpp "$@" <<EOF
993 #include <$header>
994 #if !($condition)
995 #error "unsatisfied condition: $condition"
996 #endif
997 EOF
998 }
999
1000 test_cflags_cpp(){
1001     log test_cflags_cpp "$@"
1002     flags=$1
1003     condition=$2
1004     shift 2
1005     set -- $($cflags_filter "$flags")
1006     check_cpp "$@" <<EOF
1007 #if !($condition)
1008 #error "unsatisfied condition: $condition"
1009 #endif
1010 EOF
1011 }
1012
1013 check_lib(){
1014     log check_lib "$@"
1015     name="$1"
1016     headers="$2"
1017     funcs="$3"
1018     shift 3
1019     disable $name
1020     check_func_headers "$headers" "$funcs" "$@" &&
1021         enable $name && eval ${name}_extralibs="\$@"
1022 }
1023
1024 check_pkg_config(){
1025     log check_pkg_config "$@"
1026     name="$1"
1027     pkg_version="$2"
1028     pkg="${2%% *}"
1029     headers="$3"
1030     funcs="$4"
1031     shift 4
1032     disable $name
1033     check_cmd $pkg_config --exists --print-errors $pkg_version || return
1034     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1035     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1036     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1037         enable $name &&
1038         add_cflags    "$pkg_cflags" &&
1039         eval $(sanitize_var_name ${name}_extralibs)="\$pkg_libs"
1040 }
1041
1042 check_exec(){
1043     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1044 }
1045
1046 check_exec_crash(){
1047     log check_exec_crash "$@"
1048     code=$(cat)
1049
1050     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1051     # are safe but may not be available everywhere.  Thus we use
1052     # raise(SIGTERM) instead.  The check is run in a subshell so we
1053     # can redirect the "Terminated" message from the shell.  SIGBUS
1054     # is not defined by standard C so it is used conditionally.
1055
1056     (check_exec "$@") >> $logfile 2>&1 <<EOF
1057 #include <signal.h>
1058 static void sighandler(int sig){
1059     raise(SIGTERM);
1060 }
1061 int foo(void){
1062     $code
1063 }
1064 int (*func_ptr)(void) = foo;
1065 int main(void){
1066     signal(SIGILL, sighandler);
1067     signal(SIGFPE, sighandler);
1068     signal(SIGSEGV, sighandler);
1069 #ifdef SIGBUS
1070     signal(SIGBUS, sighandler);
1071 #endif
1072     return func_ptr();
1073 }
1074 EOF
1075 }
1076
1077 check_type(){
1078     log check_type "$@"
1079     headers=$1
1080     type=$2
1081     shift 2
1082     disable_safe "$type"
1083     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1084 }
1085
1086 check_struct(){
1087     log check_struct "$@"
1088     headers=$1
1089     struct=$2
1090     member=$3
1091     shift 3
1092     disable_safe "${struct}_${member}"
1093     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1094         enable_safe "${struct}_${member}"
1095 }
1096
1097 check_builtin(){
1098     log check_builtin "$@"
1099     name=$1
1100     headers=$2
1101     builtin=$3
1102     shift 3
1103     disable "$name"
1104     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1105 }
1106
1107 check_compile_assert(){
1108     log check_compile_assert "$@"
1109     name=$1
1110     headers=$2
1111     condition=$3
1112     shift 3
1113     disable "$name"
1114     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1115 }
1116
1117 require(){
1118     log require "$@"
1119     name_version="$1"
1120     name="${1%% *}"
1121     headers="$2"
1122     func="$3"
1123     shift 3
1124     check_lib $name "$headers" $func "$@" || die "ERROR: $name_version not found"
1125 }
1126
1127 require_header(){
1128     log require "$@"
1129     header="$1"
1130     shift
1131     check_header "$header" "$@" || die "ERROR: $header not found"
1132 }
1133
1134 require_cpp_condition(){
1135     log require "$@"
1136     header="$1"
1137     condition="$2"
1138     shift 2
1139     check_cpp_condition "$header" "$condition" "$@" || die "ERROR: $condition not satisfied"
1140 }
1141
1142 require_pkg_config(){
1143     log require_pkg_config "$@"
1144     pkg_version="$2"
1145     check_pkg_config "$@" || die "ERROR: $pkg_version not found"
1146 }
1147
1148 hostcc_e(){
1149     eval printf '%s\\n' $HOSTCC_E
1150 }
1151
1152 hostcc_o(){
1153     eval printf '%s\\n' $HOSTCC_O
1154 }
1155
1156 check_host_cc(){
1157     log check_host_cc "$@"
1158     cat > $TMPC
1159     log_file $TMPC
1160     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1161 }
1162
1163 check_host_cpp(){
1164     log check_host_cpp "$@"
1165     cat > $TMPC
1166     log_file $TMPC
1167     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1168 }
1169
1170 check_host_cppflags(){
1171     log check_host_cppflags "$@"
1172     check_host_cpp "$@" <<EOF && append host_cppflags "$@"
1173 #include <stdlib.h>;
1174 EOF
1175 }
1176
1177 check_host_cflags(){
1178     log check_host_cflags "$@"
1179     set -- $($host_cflags_filter "$@")
1180     check_host_cc "$@" <<EOF && append host_cflags "$@"
1181 int x;
1182 EOF
1183 }
1184
1185 check_host_cpp_condition(){
1186     log check_host_cpp_condition "$@"
1187     header=$1
1188     condition=$2
1189     shift 2
1190     check_host_cpp "$@" <<EOF
1191 #include <$header>
1192 #if !($condition)
1193 #error "unsatisfied condition: $condition"
1194 #endif
1195 EOF
1196 }
1197
1198 apply(){
1199     file=$1
1200     shift
1201     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1202 }
1203
1204 cp_if_changed(){
1205     cmp -s "$1" "$2" && { test "$quiet" != "yes" && echo "$2 is unchanged"; } && return
1206     mkdir -p "$(dirname $2)"
1207     cp -f "$1" "$2"
1208 }
1209
1210 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1211 # system-dependent things.
1212
1213 AVCODEC_COMPONENTS="
1214     bsfs
1215     decoders
1216     encoders
1217     hwaccels
1218     parsers
1219 "
1220
1221 AVDEVICE_COMPONENTS="
1222     indevs
1223     outdevs
1224 "
1225 AVFILTER_COMPONENTS="
1226     filters
1227 "
1228 AVFORMAT_COMPONENTS="
1229     demuxers
1230     muxers
1231     protocols
1232 "
1233
1234 AVRESAMPLE_COMPONENTS=""
1235 AVUTIL_COMPONENTS=""
1236
1237 COMPONENT_LIST="
1238     $AVCODEC_COMPONENTS
1239     $AVDEVICE_COMPONENTS
1240     $AVFILTER_COMPONENTS
1241     $AVFORMAT_COMPONENTS
1242     $AVRESAMPLE_COMPONENTS
1243     $AVUTIL_COMPONENTS
1244 "
1245
1246 EXAMPLE_LIST="
1247     decode_audio_example
1248     decode_video_example
1249     encode_audio_example
1250     encode_video_example
1251     filter_audio_example
1252     metadata_example
1253     output_example
1254     qsvdec_example
1255     transcode_aac_example
1256 "
1257
1258 # catchall list of things that require external libs to link
1259 EXTRALIBS_LIST="
1260     cpu_init
1261     cws2fws
1262 "
1263
1264 HWACCEL_LIBRARY_NONFREE_LIST="
1265     cuda
1266     libnpp
1267 "
1268 HWACCEL_LIBRARY_LIST="
1269     $HWACCEL_LIBRARY_NONFREE_LIST
1270     d3d11va
1271     dxva2
1272     libmfx
1273     mmal
1274     nvenc
1275     omx
1276     vaapi
1277     vda
1278     vdpau
1279 "
1280
1281 EXTERNAL_LIBRARY_GPL_LIST="
1282     libcdio
1283     libx264
1284     libx265
1285     libxavs
1286     libxvid
1287 "
1288
1289 EXTERNAL_LIBRARY_NONFREE_LIST="
1290     libfaac
1291     libfdk_aac
1292     openssl
1293 "
1294
1295 EXTERNAL_LIBRARY_VERSION3_LIST="
1296     libopencore_amrnb
1297     libopencore_amrwb
1298     libvo_aacenc
1299     libvo_amrwbenc
1300 "
1301
1302 EXTERNAL_LIBRARY_LIST="
1303     $EXTERNAL_LIBRARY_GPL_LIST
1304     $EXTERNAL_LIBRARY_NONFREE_LIST
1305     $EXTERNAL_LIBRARY_VERSION3_LIST
1306     avisynth
1307     avxsynth
1308     frei0r
1309     gnutls
1310     libbs2b
1311     libdc1394
1312     libdcadec
1313     libfontconfig
1314     libfreetype
1315     libgsm
1316     libhdcd
1317     libilbc
1318     libkvazaar
1319     libmp3lame
1320     libopencv
1321     libopenh264
1322     libopenjpeg
1323     libopus
1324     libpulse
1325     librtmp
1326     libschroedinger
1327     libsnappy
1328     libspeex
1329     libtheora
1330     libtwolame
1331     libvorbis
1332     libvpx
1333     libwavpack
1334     libwebp
1335     libxcb
1336     libxcb_shm
1337     libxcb_xfixes
1338 "
1339
1340 SYSTEM_LIBRARY_LIST="
1341     bzlib
1342     zlib
1343 "
1344
1345 FEATURE_LIST="
1346     gray
1347     hardcoded_tables
1348     omx_rpi
1349     runtime_cpudetect
1350     safe_bitstream_reader
1351     shared
1352     small
1353     sram
1354     static
1355     swscale_alpha
1356 "
1357
1358 LIBRARY_LIST="
1359     avcodec
1360     avdevice
1361     avfilter
1362     avformat
1363     avresample
1364     avutil
1365     swscale
1366 "
1367
1368 LICENSE_LIST="
1369     gpl
1370     nonfree
1371     version3
1372 "
1373
1374 PROGRAM_LIST="
1375     avconv
1376     avplay
1377     avprobe
1378 "
1379
1380 SUBSYSTEM_LIST="
1381     dct
1382     doc
1383     error_resilience
1384     faan
1385     fft
1386     lsp
1387     lzo
1388     mdct
1389     network
1390     rdft
1391 "
1392
1393 # COMPONENT_LIST needs to come last to ensure correct dependency checking
1394 CONFIG_LIST="
1395     $EXAMPLE_LIST
1396     $EXTERNAL_LIBRARY_LIST
1397     $HWACCEL_LIBRARY_LIST
1398     $FEATURE_LIST
1399     $LICENSE_LIST
1400     $LIBRARY_LIST
1401     $PROGRAM_LIST
1402     $SUBSYSTEM_LIST
1403     $SYSTEM_LIBRARY_LIST
1404     neon_clobber_test
1405     pic
1406     pod2man
1407     texi2html
1408     thumb
1409     valgrind_backtrace
1410     xmm_clobber_test
1411     $COMPONENT_LIST
1412 "
1413
1414 THREADS_LIST="
1415     pthreads
1416     w32threads
1417 "
1418
1419 ATOMICS_LIST="
1420     atomics_gcc
1421     atomics_suncc
1422     atomics_win32
1423 "
1424
1425 ARCH_LIST="
1426     aarch64
1427     alpha
1428     arm
1429     avr32
1430     avr32_ap
1431     avr32_uc
1432     bfin
1433     ia64
1434     m68k
1435     mips
1436     mips64
1437     parisc
1438     ppc
1439     ppc64
1440     s390
1441     sh4
1442     sparc
1443     sparc64
1444     tilegx
1445     tilepro
1446     tomi
1447     x86
1448     x86_32
1449     x86_64
1450 "
1451
1452 ARCH_EXT_LIST_ARM="
1453     armv5te
1454     armv6
1455     armv6t2
1456     armv8
1457     neon
1458     vfp
1459     vfpv3
1460 "
1461
1462 ARCH_EXT_LIST_X86_SIMD="
1463     amd3dnow
1464     amd3dnowext
1465     avx
1466     avx2
1467     fma3
1468     fma4
1469     mmx
1470     mmxext
1471     sse
1472     sse2
1473     sse3
1474     sse4
1475     sse42
1476     ssse3
1477     xop
1478 "
1479
1480 ARCH_EXT_LIST_PPC="
1481     altivec
1482     dcbzl
1483     ldbrx
1484     power8
1485     ppc4xx
1486     vsx
1487 "
1488
1489 ARCH_EXT_LIST_X86="
1490     $ARCH_EXT_LIST_X86_SIMD
1491     cpunop
1492     i686
1493 "
1494
1495 ARCH_EXT_LIST_MIPS="
1496     loongson
1497     mips32r1
1498     mips64r1
1499     mips32r2
1500     mips64r2
1501     mips32r6
1502     mips64r6
1503 "
1504
1505 ARCH_EXT_LIST="
1506     $ARCH_EXT_LIST_ARM
1507     $ARCH_EXT_LIST_MIPS
1508     $ARCH_EXT_LIST_PPC
1509     $ARCH_EXT_LIST_X86
1510     vis
1511 "
1512
1513 ARCH_FEATURES="
1514     aligned_stack
1515     fast_64bit
1516     fast_clz
1517     fast_cmov
1518     local_aligned_8
1519     local_aligned_16
1520     local_aligned_32
1521     simd_align_16
1522     simd_align_32
1523 "
1524
1525 BUILTIN_LIST="
1526     atomic_cas_ptr
1527     machine_rw_barrier
1528     MemoryBarrier
1529     mm_empty
1530     rdtsc
1531     sem_timedwait
1532     sync_val_compare_and_swap
1533 "
1534 HAVE_LIST_CMDLINE="
1535     inline_asm
1536     symver
1537     x86asm
1538 "
1539
1540 HAVE_LIST_PUB="
1541     bigendian
1542     fast_unaligned
1543 "
1544
1545 HEADERS_LIST="
1546     AVFoundation_AVFoundation_h
1547     alsa_asoundlib_h
1548     altivec_h
1549     arpa_inet_h
1550     cdio_paranoia_h
1551     cdio_paranoia_paranoia_h
1552     d3d11_h
1553     dispatch_dispatch_h
1554     dev_bktr_ioctl_bt848_h
1555     dev_bktr_ioctl_meteor_h
1556     dev_ic_bt8xx_h
1557     dev_video_bktr_ioctl_bt848_h
1558     dev_video_meteor_ioctl_meteor_h
1559     direct_h
1560     dlfcn_h
1561     dxva_h
1562     gsm_h
1563     io_h
1564     mach_mach_time_h
1565     machine_ioctl_bt848_h
1566     machine_ioctl_meteor_h
1567     malloc_h
1568     poll_h
1569     sndio_h
1570     soundcard_h
1571     stdatomic_h
1572     sys_mman_h
1573     sys_param_h
1574     sys_resource_h
1575     sys_select_h
1576     sys_soundcard_h
1577     sys_time_h
1578     sys_un_h
1579     sys_videoio_h
1580     unistd_h
1581     valgrind_valgrind_h
1582     windows_h
1583     winsock2_h
1584 "
1585
1586 INTRINSICS_LIST="
1587     intrinsics_neon
1588 "
1589
1590 MATH_FUNCS="
1591     atanf
1592     atan2f
1593     cbrtf
1594     cosf
1595     exp2
1596     exp2f
1597     expf
1598     isinf
1599     isnan
1600     ldexpf
1601     llrint
1602     llrintf
1603     log2
1604     log2f
1605     log10f
1606     lrint
1607     lrintf
1608     powf
1609     rint
1610     round
1611     roundf
1612     sinf
1613     trunc
1614     truncf
1615 "
1616
1617 SYSTEM_FUNCS="
1618     aligned_malloc
1619     clock_gettime
1620     closesocket
1621     CommandLineToArgvW
1622     CoTaskMemFree
1623     CryptGenRandom
1624     fcntl
1625     flt_lim
1626     fork
1627     getaddrinfo
1628     gethrtime
1629     getopt
1630     GetProcessAffinityMask
1631     GetProcessMemoryInfo
1632     GetProcessTimes
1633     getrusage
1634     GetSystemTimeAsFileTime
1635     gettimeofday
1636     gmtime_r
1637     inet_aton
1638     isatty
1639     jack_port_get_latency_range
1640     LoadLibrary
1641     localtime_r
1642     mach_absolute_time
1643     MapViewOfFile
1644     memalign
1645     mkstemp
1646     mmap
1647     mprotect
1648     nanosleep
1649     posix_memalign
1650     sched_getaffinity
1651     SetConsoleTextAttribute
1652     setmode
1653     setrlimit
1654     Sleep
1655     strerror_r
1656     sysconf
1657     sysctl
1658     usleep
1659     VirtualAlloc
1660 "
1661
1662 TOOLCHAIN_FEATURES="
1663     as_dn_directive
1664     as_fpu_directive
1665     as_func
1666     as_object_arch
1667     asm_mod_q
1668     attribute_may_alias
1669     attribute_packed
1670     blocks_extension
1671     ebp_available
1672     ebx_available
1673     gnu_as
1674     ibm_asm
1675     inline_asm_labels
1676     pragma_deprecated
1677     symver_asm_label
1678     symver_gnu_asm
1679     vfp_args
1680     xform_asm
1681     xmm_clobbers
1682 "
1683
1684 TYPES_LIST="
1685     CONDITION_VARIABLE_Ptr
1686     socklen_t
1687     struct_addrinfo
1688     struct_group_source_req
1689     struct_ip_mreq_source
1690     struct_ipv6_mreq
1691     struct_pollfd
1692     struct_rusage_ru_maxrss
1693     struct_sockaddr_in6
1694     struct_sockaddr_sa_len
1695     struct_sockaddr_storage
1696     struct_v4l2_frmivalenum_discrete
1697 "
1698
1699 HAVE_LIST="
1700     $ARCH_EXT_LIST
1701     $(add_suffix _external $ARCH_EXT_LIST)
1702     $(add_suffix _inline   $ARCH_EXT_LIST)
1703     $ARCH_FEATURES
1704     $BUILTIN_LIST
1705     $HAVE_LIST_CMDLINE
1706     $HAVE_LIST_PUB
1707     $HEADERS_LIST
1708     $INTRINSICS_LIST
1709     $MATH_FUNCS
1710     $SYSTEM_FUNCS
1711     $THREADS_LIST
1712     $TOOLCHAIN_FEATURES
1713     $TYPES_LIST
1714     dos_paths
1715     dxva2_lib
1716     libc_msvcrt
1717     MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
1718     sdl
1719     section_data_rel_ro
1720     threads
1721     vaapi_drm
1722     vaapi_x11
1723     vdpau_x11
1724 "
1725
1726 # options emitted with CONFIG_ prefix but not available on the command line
1727 CONFIG_EXTRA="
1728     aandcttables
1729     ac3dsp
1730     audio_frame_queue
1731     audiodsp
1732     blockdsp
1733     bswapdsp
1734     cabac
1735     dirac_parse
1736     dvprofile
1737     faandct
1738     faanidct
1739     fdctdsp
1740     flacdsp
1741     fmtconvert
1742     g722dsp
1743     gmp
1744     golomb
1745     gplv3
1746     h263dsp
1747     h264chroma
1748     h264dsp
1749     h264parse
1750     h264pred
1751     h264qpel
1752     hevc_ps
1753     hpeldsp
1754     huffman
1755     huffyuvdsp
1756     huffyuvencdsp
1757     idctdsp
1758     iirfilter
1759     imdct15
1760     intrax8
1761     iso_media
1762     ividsp
1763     jpegtables
1764     lgplv3
1765     libx262
1766     libxcb_shape
1767     lpc
1768     lzf
1769     me_cmp
1770     mpeg_er
1771     mpegaudio
1772     mpegaudiodsp
1773     mpegaudioheader
1774     mpegvideo
1775     mpegvideoenc
1776     mss34dsp
1777     pixblockdsp
1778     qpeldsp
1779     qsv
1780     qsvdec
1781     qsvenc
1782     rangecoder
1783     riffdec
1784     riffenc
1785     rtpdec
1786     rtpenc_chain
1787     rv34dsp
1788     sinewin
1789     snappy
1790     srtp
1791     startcode
1792     texturedsp
1793     texturedspenc
1794     tpeldsp
1795     vaapi_encode
1796     vc1dsp
1797     videodsp
1798     vp3dsp
1799     vp56dsp
1800     vp8dsp
1801     wma_freqs
1802     wmv2dsp
1803 "
1804
1805 CMDLINE_SELECT="
1806     $ARCH_EXT_LIST
1807     $CONFIG_LIST
1808     $HAVE_LIST_CMDLINE
1809     $THREADS_LIST
1810     asm
1811     cross_compile
1812     debug
1813     extra_warnings
1814     logging
1815     lto
1816     optimizations
1817     rpath
1818 "
1819
1820 PATHS_LIST="
1821     bindir
1822     datadir
1823     docdir
1824     incdir
1825     libdir
1826     mandir
1827     prefix
1828     shlibdir
1829 "
1830
1831 CMDLINE_SET="
1832     $PATHS_LIST
1833     ar
1834     arch
1835     as
1836     cc
1837     objcc
1838     cpu
1839     cross_prefix
1840     custom_allocator
1841     dep_cc
1842     env
1843     extra_version
1844     host_cc
1845     host_cflags
1846     host_extralibs
1847     host_ld
1848     host_ldflags
1849     host_os
1850     ignore_tests
1851     ld
1852     logfile
1853     malloc_prefix
1854     nm
1855     optflags
1856     pkg_config
1857     pkg_config_flags
1858     random_seed
1859     samples
1860     sysinclude
1861     sysroot
1862     target_exec
1863     target_os
1864     target_path
1865     target_samples
1866     toolchain
1867     x86asmexe
1868 "
1869
1870 CMDLINE_APPEND="
1871     extra_cflags
1872     extra_objcflags
1873     host_cppflags
1874 "
1875
1876 # code dependency declarations
1877
1878 # architecture extensions
1879
1880 armv5te_deps="arm"
1881 armv6_deps="arm"
1882 armv6t2_deps="arm"
1883 armv8_deps="aarch64"
1884 neon_deps_any="aarch64 arm"
1885 intrinsics_neon_deps="neon"
1886 vfp_deps_any="aarch64 arm"
1887 vfpv3_deps="vfp"
1888
1889 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1890
1891 altivec_deps="ppc"
1892 ppc4xx_deps="ppc"
1893 vsx_deps="altivec"
1894 power8_deps="vsx"
1895
1896 cpunop_deps="i686"
1897 x86_64_select="i686"
1898 x86_64_suggest="fast_cmov"
1899
1900 amd3dnow_deps="mmx"
1901 amd3dnowext_deps="amd3dnow"
1902 i686_deps="x86"
1903 mmx_deps="x86"
1904 mmxext_deps="mmx"
1905 sse_deps="mmxext"
1906 sse2_deps="sse"
1907 sse3_deps="sse2"
1908 ssse3_deps="sse3"
1909 sse4_deps="ssse3"
1910 sse42_deps="sse4"
1911 avx_deps="sse42"
1912 xop_deps="avx"
1913 fma3_deps="avx"
1914 fma4_deps="avx"
1915 avx2_deps="avx"
1916
1917 mmx_external_deps="x86asm"
1918 mmx_inline_deps="inline_asm"
1919 mmx_suggest="mmx_external mmx_inline"
1920
1921 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1922     eval dep=\$${ext}_deps
1923     eval ${ext}_external_deps='"${dep}_external"'
1924     eval ${ext}_inline_deps='"${dep}_inline"'
1925     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1926 done
1927
1928 aligned_stack_if_any="aarch64 ppc x86"
1929 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1930 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1931 fast_unaligned_if_any="aarch64 ppc x86"
1932 simd_align_16_if_any="altivec neon sse"
1933 simd_align_32_if_any="avx"
1934
1935 # system capabilities
1936 symver_if_any="symver_asm_label symver_gnu_asm"
1937 valgrind_backtrace_conflict="optimizations"
1938 valgrind_backtrace_deps="valgrind_valgrind_h"
1939
1940 # threading support
1941 atomics_gcc_if="sync_val_compare_and_swap"
1942 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1943 atomics_win32_if="MemoryBarrier"
1944 atomics_native_if_any="$ATOMICS_LIST"
1945 w32threads_deps="atomics_native"
1946 threads_if_any="$THREADS_LIST"
1947
1948 # subsystems
1949 dct_select="rdft"
1950 dirac_parse_select="golomb"
1951 error_resilience_select="me_cmp"
1952 faandct_deps="faan fdctdsp"
1953 faanidct_deps="faan idctdsp"
1954 h264dsp_select="startcode"
1955 hevc_ps_select="golomb"
1956 intrax8_select="blockdsp idctdsp"
1957 mdct_select="fft"
1958 rdft_select="fft"
1959 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1960 mpeg_er_select="error_resilience"
1961 mpegaudio_select="mpegaudiodsp mpegaudioheader"
1962 mpegaudiodsp_select="dct"
1963 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp mpeg_er videodsp"
1964 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1965 vc1dsp_select="h264chroma qpeldsp startcode"
1966
1967 # decoders / encoders
1968 aac_decoder_select="imdct15 mdct sinewin"
1969 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1970 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1971 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1972 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1973 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1974 adpcm_g722_decoder_select="g722dsp"
1975 adpcm_g722_encoder_select="g722dsp"
1976 aic_decoder_select="golomb idctdsp"
1977 alac_encoder_select="lpc"
1978 als_decoder_select="bswapdsp"
1979 amrnb_decoder_select="lsp"
1980 amrwb_decoder_select="lsp"
1981 amv_decoder_select="sp5x_decoder"
1982 ape_decoder_select="bswapdsp"
1983 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1984 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1985 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1986 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1987 atrac1_decoder_select="mdct sinewin"
1988 atrac3_decoder_select="mdct"
1989 atrac3p_decoder_select="mdct sinewin"
1990 bink_decoder_select="blockdsp hpeldsp"
1991 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1992 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1993 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1994 cllc_decoder_select="bswapdsp"
1995 comfortnoise_encoder_select="lpc"
1996 cook_decoder_select="audiodsp mdct sinewin"
1997 cscd_decoder_select="lzo"
1998 cscd_decoder_suggest="zlib"
1999 dca_decoder_select="fmtconvert mdct"
2000 dds_decoder_select="texturedsp"
2001 dnxhd_decoder_select="blockdsp idctdsp"
2002 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
2003 dvvideo_decoder_select="dvprofile idctdsp"
2004 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
2005 dxa_decoder_deps="zlib"
2006 dxv_decoder_select="lzf texturedsp"
2007 eac3_decoder_select="ac3_decoder"
2008 eac3_encoder_select="ac3_encoder"
2009 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
2010 eatgq_decoder_select="aandcttables idctdsp"
2011 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
2012 exr_decoder_deps="zlib"
2013 ffv1_decoder_select="rangecoder"
2014 ffv1_encoder_select="rangecoder"
2015 ffvhuff_decoder_select="huffyuv_decoder"
2016 ffvhuff_encoder_select="huffyuv_encoder"
2017 fic_decoder_select="golomb"
2018 flac_decoder_select="flacdsp"
2019 flac_encoder_select="bswapdsp flacdsp lpc"
2020 flashsv_decoder_deps="zlib"
2021 flashsv_encoder_deps="zlib"
2022 flashsv2_decoder_deps="zlib"
2023 flv_decoder_select="h263_decoder"
2024 flv_encoder_select="h263_encoder"
2025 fourxm_decoder_select="blockdsp bswapdsp"
2026 fraps_decoder_select="bswapdsp huffman"
2027 g2m_decoder_deps="zlib"
2028 g2m_decoder_select="blockdsp idctdsp jpegtables"
2029 h261_decoder_select="mpeg_er mpegvideo"
2030 h261_encoder_select="aandcttables mpegvideoenc"
2031 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
2032 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
2033 h263i_decoder_select="h263_decoder"
2034 h263p_encoder_select="h263_encoder"
2035 h264_decoder_select="cabac golomb h264chroma h264dsp h264parse h264pred h264qpel videodsp"
2036 h264_decoder_suggest="error_resilience"
2037 hap_decoder_select="snappy texturedsp"
2038 hap_encoder_deps="libsnappy"
2039 hap_encoder_select="texturedspenc"
2040 hevc_decoder_select="bswapdsp cabac hevc_ps videodsp"
2041 huffyuv_decoder_select="bswapdsp huffyuvdsp"
2042 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
2043 iac_decoder_select="imc_decoder"
2044 imc_decoder_select="bswapdsp fft mdct sinewin"
2045 indeo3_decoder_select="hpeldsp"
2046 indeo4_decoder_select="ividsp"
2047 indeo5_decoder_select="ividsp"
2048 interplay_video_decoder_select="hpeldsp"
2049 jpegls_decoder_select="mjpeg_decoder"
2050 jv_decoder_select="blockdsp"
2051 lagarith_decoder_select="huffyuvdsp"
2052 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
2053 magicyuv_decoder_select="huffyuvdsp"
2054 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2055 metasound_decoder_select="lsp mdct sinewin"
2056 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2057 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
2058 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
2059 mjpegb_decoder_select="mjpeg_decoder"
2060 mlp_decoder_select="mlp_parser"
2061 motionpixels_decoder_select="bswapdsp"
2062 mp1_decoder_select="mpegaudio"
2063 mp1float_decoder_select="mpegaudio"
2064 mp2_decoder_select="mpegaudio"
2065 mp2float_decoder_select="mpegaudio"
2066 mp3_decoder_select="mpegaudio"
2067 mp3adu_decoder_select="mpegaudio"
2068 mp3adufloat_decoder_select="mpegaudio"
2069 mp3float_decoder_select="mpegaudio"
2070 mp3on4_decoder_select="mpegaudio"
2071 mp3on4float_decoder_select="mpegaudio"
2072 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2073 mpc8_decoder_select="mpegaudiodsp"
2074 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2075 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2076 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2077 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2078 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2079 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2080 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2081 mpeg4_encoder_select="h263_encoder"
2082 msa1_decoder_select="mss34dsp"
2083 msmpeg4v1_decoder_select="h263_decoder"
2084 msmpeg4v2_decoder_select="h263_decoder"
2085 msmpeg4v2_encoder_select="h263_encoder"
2086 msmpeg4v3_decoder_select="h263_decoder"
2087 msmpeg4v3_encoder_select="h263_encoder"
2088 mss2_decoder_select="error_resilience mpeg_er mpegvideo qpeldsp vc1_decoder"
2089 mts2_decoder_select="mss34dsp"
2090 mxpeg_decoder_select="mjpeg_decoder"
2091 nellymoser_decoder_select="mdct sinewin"
2092 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2093 nuv_decoder_select="idctdsp lzo"
2094 on2avc_decoder_select="mdct"
2095 opus_decoder_deps="avresample"
2096 opus_decoder_select="imdct15"
2097 png_decoder_deps="zlib"
2098 png_encoder_deps="zlib"
2099 png_encoder_select="huffyuvencdsp"
2100 prores_decoder_select="idctdsp"
2101 prores_encoder_select="fdctdsp"
2102 qcelp_decoder_select="lsp"
2103 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2104 ra_144_encoder_select="audio_frame_queue lpc"
2105 ralf_decoder_select="golomb"
2106 rscc_decoder_deps="zlib"
2107 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2108 rv10_encoder_select="h263_encoder"
2109 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2110 rv20_encoder_select="h263_encoder"
2111 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2112 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2113 screenpresso_decoder_deps="zlib"
2114 sipr_decoder_select="lsp"
2115 sp5x_decoder_select="mjpeg_decoder"
2116 svq1_decoder_select="hpeldsp"
2117 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2118 svq3_decoder_select="golomb h264dsp h264parse h264pred hpeldsp tpeldsp videodsp"
2119 svq3_decoder_suggest="zlib"
2120 tak_decoder_select="audiodsp"
2121 tdsc_decoder_deps="zlib"
2122 tdsc_decoder_select="mjpeg_decoder"
2123 theora_decoder_select="vp3_decoder"
2124 thp_decoder_select="mjpeg_decoder"
2125 tiff_decoder_suggest="zlib"
2126 tiff_encoder_suggest="zlib"
2127 truehd_decoder_select="mlp_decoder"
2128 truemotion2_decoder_select="bswapdsp"
2129 truespeech_decoder_select="bswapdsp"
2130 tscc_decoder_deps="zlib"
2131 txd_decoder_select="texturedsp"
2132 twinvq_decoder_select="mdct lsp sinewin"
2133 utvideo_decoder_select="bswapdsp"
2134 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2135 vble_decoder_select="huffyuvdsp"
2136 vc1_decoder_select="blockdsp error_resilience h263_decoder h264qpel intrax8 mpeg_er mpegvideo vc1dsp"
2137 vc1image_decoder_select="vc1_decoder"
2138 vorbis_decoder_select="mdct"
2139 vorbis_encoder_select="mdct"
2140 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2141 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2142 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2143 vp6a_decoder_select="vp6_decoder"
2144 vp6f_decoder_select="vp6_decoder"
2145 vp7_decoder_select="h264pred videodsp vp8dsp"
2146 vp8_decoder_select="h264pred videodsp vp8dsp"
2147 vp9_decoder_select="videodsp vp9_superframe_split_bsf"
2148 webp_decoder_select="vp8_decoder"
2149 wmapro_decoder_select="mdct sinewin wma_freqs"
2150 wmav1_decoder_select="mdct sinewin wma_freqs"
2151 wmav1_encoder_select="mdct sinewin wma_freqs"
2152 wmav2_decoder_select="mdct sinewin wma_freqs"
2153 wmav2_encoder_select="mdct sinewin wma_freqs"
2154 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2155 wmv1_decoder_select="h263_decoder"
2156 wmv1_encoder_select="h263_encoder"
2157 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2158 wmv2_encoder_select="h263_encoder wmv2dsp"
2159 wmv3_decoder_select="vc1_decoder"
2160 wmv3image_decoder_select="wmv3_decoder"
2161 zerocodec_decoder_deps="zlib"
2162 zlib_decoder_deps="zlib"
2163 zlib_encoder_deps="zlib"
2164 zmbv_decoder_deps="zlib"
2165 zmbv_encoder_deps="zlib"
2166
2167 # hardware accelerators
2168 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2169 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2170 dxva2_lib_deps="dxva2"
2171 vda_deps="VideoDecodeAcceleration_VDADecoder_h blocks_extension pthreads"
2172 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2173
2174 h263_vaapi_hwaccel_deps="vaapi"
2175 h263_vaapi_hwaccel_select="h263_decoder"
2176 h264_d3d11va_hwaccel_deps="d3d11va"
2177 h264_d3d11va_hwaccel_select="h264_decoder"
2178 h264_dxva2_hwaccel_deps="dxva2"
2179 h264_dxva2_hwaccel_select="h264_decoder"
2180 h264_mmal_hwaccel_deps="mmal"
2181 h264_qsv_hwaccel_deps="libmfx"
2182 h264_vaapi_hwaccel_deps="vaapi"
2183 h264_vaapi_hwaccel_select="h264_decoder"
2184 h264_vda_hwaccel_deps="vda"
2185 h264_vda_hwaccel_select="h264_decoder"
2186 h264_vda_old_hwaccel_deps="vda"
2187 h264_vda_old_hwaccel_select="h264_decoder"
2188 h264_vdpau_hwaccel_deps="vdpau"
2189 h264_vdpau_hwaccel_select="h264_decoder"
2190 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2191 hevc_d3d11va_hwaccel_select="hevc_decoder"
2192 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2193 hevc_dxva2_hwaccel_select="hevc_decoder"
2194 hevc_qsv_hwaccel_deps="libmfx"
2195 hevc_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferHEVC"
2196 hevc_vaapi_hwaccel_select="hevc_decoder"
2197 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2198 hevc_vdpau_hwaccel_select="hevc_decoder"
2199 mpeg1_vdpau_hwaccel_deps="vdpau"
2200 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2201 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2202 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2203 mpeg2_dxva2_hwaccel_deps="dxva2"
2204 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2205 mpeg2_mmal_hwaccel_deps="mmal"
2206 mpeg2_qsv_hwaccel_deps="libmfx"
2207 mpeg2_vaapi_hwaccel_deps="vaapi"
2208 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2209 mpeg2_vdpau_hwaccel_deps="vdpau"
2210 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2211 mpeg4_vaapi_hwaccel_deps="vaapi"
2212 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2213 mpeg4_vdpau_hwaccel_deps="vdpau"
2214 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2215 vc1_d3d11va_hwaccel_deps="d3d11va"
2216 vc1_d3d11va_hwaccel_select="vc1_decoder"
2217 vc1_dxva2_hwaccel_deps="dxva2"
2218 vc1_dxva2_hwaccel_select="vc1_decoder"
2219 vc1_mmal_hwaccel_deps="mmal"
2220 vc1_qsv_hwaccel_deps="libmfx"
2221 vc1_vaapi_hwaccel_deps="vaapi"
2222 vc1_vaapi_hwaccel_select="vc1_decoder"
2223 vc1_vdpau_hwaccel_deps="vdpau"
2224 vc1_vdpau_hwaccel_select="vc1_decoder"
2225 vp8_qsv_hwaccel_deps="libmfx"
2226 vp8_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferVP8"
2227 vp8_vaapi_hwaccel_select="vp8_decoder"
2228 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2229 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2230 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2231 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2232
2233 # hardware-accelerated codecs
2234 nvenc_deps_any="libdl LoadLibrary"
2235 omx_deps="libdl pthreads"
2236 omx_rpi_select="omx"
2237 qsvdec_select="qsv"
2238 qsvenc_select="qsv"
2239 vaapi_encode_deps="vaapi"
2240
2241 hwupload_cuda_filter_deps="cuda"
2242 scale_npp_filter_deps="cuda libnpp"
2243
2244 h264_mmal_decoder_deps="mmal"
2245 h264_nvenc_encoder_deps="nvenc"
2246 h264_omx_encoder_deps="omx"
2247 h264_qsv_decoder_deps="libmfx"
2248 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
2249 h264_qsv_encoder_deps="libmfx"
2250 h264_qsv_encoder_select="qsvenc"
2251 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
2252 h264_vaapi_encoder_select="vaapi_encode golomb"
2253 hevc_nvenc_encoder_deps="nvenc"
2254 hevc_qsv_decoder_deps="libmfx"
2255 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser hevc_qsv_hwaccel qsvdec"
2256 hevc_qsv_encoder_deps="libmfx"
2257 hevc_qsv_encoder_select="hevc_ps qsvenc"
2258 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
2259 hevc_vaapi_encoder_select="vaapi_encode golomb"
2260 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
2261 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
2262 mpeg2_mmal_decoder_deps="mmal"
2263 mpeg2_qsv_decoder_deps="libmfx"
2264 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2265 mpeg2_qsv_encoder_deps="libmfx"
2266 mpeg2_qsv_encoder_select="qsvenc"
2267 mpeg2_vaapi_encoder_deps="VAEncPictureParameterBufferMPEG2"
2268 mpeg2_vaapi_encoder_select="vaapi_encode"
2269 mpeg4_omx_encoder_deps="omx"
2270 vc1_mmal_decoder_deps="mmal"
2271 vc1_qsv_decoder_deps="libmfx"
2272 vc1_qsv_decoder_select="qsvdec vc1_qsv_hwaccel vc1_parser"
2273 vp8_qsv_decoder_deps="libmfx"
2274 vp8_qsv_decoder_select="qsvdec vp8_qsv_hwaccel vp8_parser"
2275 vp8_vaapi_encoder_deps="VAEncPictureParameterBufferVP8"
2276 vp8_vaapi_encoder_select="vaapi_encode"
2277
2278 nvenc_h264_encoder_select="h264_nvenc_encoder"
2279 nvenc_hevc_encoder_select="hevc_nvenc_encoder"
2280
2281 # parsers
2282 h264_parser_select="golomb h264dsp h264parse"
2283 hevc_parser_select="hevc_ps"
2284 mpegaudio_parser_select="mpegaudioheader"
2285 mpegvideo_parser_select="mpegvideo"
2286 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2287 vc1_parser_select="vc1dsp"
2288
2289 # bitstream_filters
2290 mjpeg2jpeg_bsf_select="jpegtables"
2291
2292 # external libraries
2293 avisynth_deps="LoadLibrary"
2294 avxsynth_deps="libdl"
2295 avisynth_demuxer_deps_any="avisynth avxsynth"
2296 avisynth_demuxer_select="riffdec"
2297 libdcadec_decoder_deps="libdcadec"
2298 libfaac_encoder_deps="libfaac"
2299 libfaac_encoder_select="audio_frame_queue"
2300 libfdk_aac_decoder_deps="libfdk_aac"
2301 libfdk_aac_encoder_deps="libfdk_aac"
2302 libfdk_aac_encoder_select="audio_frame_queue"
2303 libgsm_decoder_deps="libgsm"
2304 libgsm_encoder_deps="libgsm"
2305 libgsm_ms_decoder_deps="libgsm"
2306 libgsm_ms_encoder_deps="libgsm"
2307 libilbc_decoder_deps="libilbc"
2308 libilbc_encoder_deps="libilbc"
2309 libkvazaar_encoder_deps="libkvazaar"
2310 libmp3lame_encoder_deps="libmp3lame"
2311 libmp3lame_encoder_select="audio_frame_queue mpegaudioheader"
2312 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2313 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2314 libopencore_amrnb_encoder_select="audio_frame_queue"
2315 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2316 libopenh264_decoder_deps="libopenh264"
2317 libopenh264_decoder_select="h264_mp4toannexb_bsf"
2318 libopenh264_encoder_deps="libopenh264"
2319 libopenjpeg_decoder_deps="libopenjpeg"
2320 libopenjpeg_encoder_deps="libopenjpeg"
2321 libopus_decoder_deps="libopus"
2322 libopus_encoder_deps="libopus"
2323 libopus_encoder_select="audio_frame_queue"
2324 libschroedinger_decoder_deps="libschroedinger"
2325 libschroedinger_encoder_deps="libschroedinger"
2326 libspeex_decoder_deps="libspeex"
2327 libspeex_encoder_deps="libspeex"
2328 libspeex_encoder_select="audio_frame_queue"
2329 libtheora_encoder_deps="libtheora"
2330 libtwolame_encoder_deps="libtwolame"
2331 libvo_aacenc_encoder_deps="libvo_aacenc"
2332 libvo_aacenc_encoder_select="audio_frame_queue"
2333 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2334 libvorbis_encoder_deps="libvorbis"
2335 libvorbis_encoder_select="audio_frame_queue"
2336 libvpx_vp8_decoder_deps="libvpx"
2337 libvpx_vp8_encoder_deps="libvpx"
2338 libvpx_vp9_decoder_deps="libvpx"
2339 libvpx_vp9_encoder_deps="libvpx"
2340 libwavpack_encoder_deps="libwavpack"
2341 libwavpack_encoder_select="audio_frame_queue"
2342 libwebp_encoder_deps="libwebp"
2343 libx262_encoder_deps="libx262"
2344 libx264_encoder_deps="libx264"
2345 libx265_encoder_deps="libx265"
2346 libxavs_encoder_deps="libxavs"
2347 libxvid_encoder_deps="libxvid mkstemp"
2348
2349 # demuxers / muxers
2350 ac3_demuxer_select="ac3_parser"
2351 asf_demuxer_select="riffdec"
2352 asf_muxer_select="riffenc"
2353 asf_stream_muxer_select="asf_muxer"
2354 avi_demuxer_select="iso_media riffdec"
2355 avi_muxer_select="riffenc"
2356 caf_demuxer_select="iso_media riffdec"
2357 dash_muxer_select="mp4_muxer"
2358 dirac_demuxer_select="dirac_parser"
2359 dv_demuxer_select="dvprofile"
2360 dv_muxer_select="dvprofile"
2361 dxa_demuxer_select="riffdec"
2362 eac3_demuxer_select="ac3_parser"
2363 f4v_muxer_select="mov_muxer"
2364 flac_demuxer_select="flac_parser"
2365 hds_muxer_select="flv_muxer"
2366 hls_muxer_select="mpegts_muxer"
2367 ipod_muxer_select="mov_muxer"
2368 ismv_muxer_select="mov_muxer"
2369 matroska_audio_muxer_select="matroska_muxer"
2370 matroska_demuxer_select="iso_media riffdec"
2371 matroska_demuxer_suggest="bzlib lzo zlib"
2372 matroska_muxer_select="iso_media riffenc"
2373 mmf_muxer_select="riffenc"
2374 mov_demuxer_select="iso_media riffdec"
2375 mov_demuxer_suggest="zlib"
2376 mov_muxer_select="iso_media riffenc rtpenc_chain"
2377 mp3_demuxer_select="mpegaudio_parser"
2378 mp3_muxer_select="mpegaudioheader"
2379 mp4_muxer_select="mov_muxer"
2380 mpegts_demuxer_select="iso_media"
2381 mpegts_muxer_select="adts_muxer latm_muxer"
2382 mpegtsraw_demuxer_select="mpegts_demuxer"
2383 mxf_d10_muxer_select="mxf_muxer"
2384 nut_muxer_select="riffenc"
2385 nuv_demuxer_select="riffdec"
2386 oga_muxer_select="ogg_muxer"
2387 ogg_demuxer_select="dirac_parse"
2388 opus_muxer_select="ogg_muxer"
2389 psp_muxer_select="mov_muxer"
2390 rtp_demuxer_select="sdp_demuxer"
2391 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2392 rtsp_demuxer_select="http_protocol rtpdec"
2393 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2394 sap_demuxer_select="sdp_demuxer"
2395 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2396 sdp_demuxer_select="rtpdec"
2397 smoothstreaming_muxer_select="ismv_muxer"
2398 spdif_muxer_select="aac_parser"
2399 spx_muxer_select="ogg_muxer"
2400 swf_demuxer_suggest="zlib"
2401 tak_demuxer_select="tak_parser"
2402 tg2_muxer_select="mov_muxer"
2403 tgp_muxer_select="mov_muxer"
2404 w64_demuxer_select="wav_demuxer"
2405 wav_demuxer_select="riffdec"
2406 wav_muxer_select="riffenc"
2407 webm_muxer_select="iso_media riffenc"
2408 wtv_demuxer_select="mpegts_demuxer riffdec"
2409 xmv_demuxer_select="riffdec"
2410 xwma_demuxer_select="riffdec"
2411
2412 # indevs / outdevs
2413 alsa_indev_deps="alsa"
2414 alsa_outdev_deps="alsa"
2415 avfoundation_indev_deps="AVFoundation_AVFoundation_h objc_arc pthreads"
2416 avfoundation_indev_extralibs="-framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia"
2417 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2418 dv1394_indev_deps="dv1394"
2419 dv1394_indev_select="dv_demuxer"
2420 fbdev_indev_deps="linux_fb_h"
2421 jack_indev_deps="jack"
2422 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
2423 libcdio_indev_deps="libcdio"
2424 libdc1394_indev_deps="libdc1394"
2425 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2426 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2427 pulse_indev_deps="libpulse"
2428 sndio_indev_deps="sndio"
2429 sndio_outdev_deps="sndio"
2430 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2431 vfwcap_indev_deps="vfw32 vfwcap_defines"
2432 xcbgrab_indev_deps="libxcb libxcb_shape"
2433 xcbgrab_indev_suggest="libxcb_shm libxcb_xfixes"
2434
2435 # protocols
2436 ffrtmpcrypt_protocol_conflict="librtmp_protocol"
2437 ffrtmpcrypt_protocol_deps_any="gmp openssl"
2438 ffrtmpcrypt_protocol_select="tcp_protocol"
2439 ffrtmphttp_protocol_conflict="librtmp_protocol"
2440 ffrtmphttp_protocol_select="http_protocol"
2441 gopher_protocol_select="network"
2442 http_protocol_select="tcp_protocol"
2443 httpproxy_protocol_select="tcp_protocol"
2444 https_protocol_select="tls_protocol"
2445 icecast_protocol_select="http_protocol"
2446 librtmp_protocol_deps="librtmp"
2447 librtmpe_protocol_deps="librtmp"
2448 librtmps_protocol_deps="librtmp"
2449 librtmpt_protocol_deps="librtmp"
2450 librtmpte_protocol_deps="librtmp"
2451 mmsh_protocol_select="http_protocol"
2452 mmst_protocol_select="network"
2453 rtmp_protocol_conflict="librtmp_protocol"
2454 rtmp_protocol_select="tcp_protocol"
2455 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2456 rtmps_protocol_conflict="librtmp_protocol"
2457 rtmps_protocol_select="tls_protocol"
2458 rtmpt_protocol_select="ffrtmphttp_protocol"
2459 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2460 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2461 rtp_protocol_select="udp_protocol"
2462 sctp_protocol_deps="struct_sctp_event_subscribe"
2463 sctp_protocol_select="network"
2464 srtp_protocol_select="rtp_protocol srtp"
2465 tcp_protocol_select="network"
2466 tls_gnutls_protocol_deps="gnutls"
2467 tls_gnutls_protocol_select="tcp_protocol"
2468 tls_openssl_protocol_conflict="tls_gnutls_protocol"
2469 tls_openssl_protocol_deps="openssl"
2470 tls_openssl_protocol_select="tcp_protocol"
2471 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2472 udp_protocol_select="network"
2473 unix_protocol_deps="sys_un_h"
2474 unix_protocol_select="network"
2475
2476 # filters
2477 asyncts_filter_deps="avresample"
2478 blackframe_filter_deps="gpl"
2479 boxblur_filter_deps="gpl"
2480 bs2b_filter_deps="libbs2b"
2481 cropdetect_filter_deps="gpl"
2482 deinterlace_qsv_filter_deps="libmfx"
2483 deinterlace_vaapi_filter_deps="vaapi"
2484 delogo_filter_deps="gpl"
2485 drawtext_filter_deps="libfreetype"
2486 drawtext_filter_suggest="libfontconfig"
2487 frei0r_filter_deps="frei0r libdl"
2488 frei0r_src_filter_deps="frei0r libdl"
2489 hdcd_filter_deps="libhdcd"
2490 hqdn3d_filter_deps="gpl"
2491 interlace_filter_deps="gpl"
2492 movie_filter_deps="avcodec avformat"
2493 ocv_filter_deps="libopencv"
2494 resample_filter_deps="avresample"
2495 scale_filter_deps="swscale"
2496 scale_qsv_filter_deps="libmfx"
2497 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2498
2499 # examples
2500 decode_audio_example_deps="avcodec avutil"
2501 decode_video_example_deps="avcodec avutil"
2502 encode_audio_example_deps="avcodec avutil"
2503 encode_video_example_deps="avcodec avutil"
2504 filter_audio_example_deps="avfilter avutil"
2505 metadata_example_deps="avformat avutil"
2506 output_example_deps="avcodec avformat avresample avutil swscale"
2507 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder"
2508 transcode_aac_example_deps="avcodec avformat avresample"
2509
2510 # EXTRALIBS_LIST
2511 cpu_init_extralibs="pthreads_extralibs"
2512 cws2fws_extralibs="zlib_extralibs"
2513
2514 # libraries, in linking order
2515 avcodec_deps="avutil"
2516 avcodec_select="null_bsf"
2517 avdevice_deps="avformat avcodec avutil"
2518 avfilter_deps="avutil"
2519 avformat_deps="avcodec avutil"
2520 avformat_suggest="network"
2521 avresample_deps="avutil"
2522 swscale_deps="avutil"
2523
2524 avcodec_extralibs="pthreads_extralibs libm_extralibs"
2525 avdevice_extralibs="libm_extralibs"
2526 avformat_extralibs="libm_extralibs"
2527 avfilter_extralibs="pthreads_extralibs libm_extralibs"
2528 avresample_extralibs="libm_extralibs"
2529 avutil_extralibs="clock_gettime_extralibs cuda_extralibs libm_extralibs libmfx_extralibs nanosleep_extralibs pthreads_extralibs user32_extralibs vaapi_extralibs vaapi_drm_extralibs vaapi_x11_extralibs vdpau_x11_extralibs wincrypt_extralibs"
2530 swscale_extralibs="libm_extralibs"
2531
2532 # programs
2533 avconv_deps="avcodec avfilter avformat avresample swscale"
2534 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2535                fps_filter null_filter resample_filter scale_filter
2536                trim_filter"
2537 avconv_suggest="dxva2_lib ole32 psapi shell32"
2538 avplay_deps="avcodec avfilter avformat avresample sdl"
2539 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2540 avplay_suggest="shell32"
2541 avprobe_deps="avcodec avformat"
2542 avprobe_suggest="shell32"
2543
2544 # documentation
2545 pod2man_deps="doc"
2546 texi2html_deps="doc"
2547
2548 # default parameters
2549
2550 logfile="avbuild/config.log"
2551
2552 # installation paths
2553 prefix_default="/usr/local"
2554 bindir_default='${prefix}/bin'
2555 datadir_default='${prefix}/share/avconv'
2556 docdir_default='${prefix}/share/doc/libav'
2557 incdir_default='${prefix}/include'
2558 libdir_default='${prefix}/lib'
2559 mandir_default='${prefix}/share/man'
2560 shlibdir_default="$libdir_default"
2561
2562 # toolchain
2563 ar_default="ar"
2564 cc_default="gcc"
2565 host_cc_default="gcc"
2566 x86asmexe_default="nasm"
2567 ln_s="ln -s -f"
2568 nm_default="nm -g"
2569 pkg_config_default=pkg-config
2570 ranlib="ranlib"
2571 strip="strip"
2572 version_script='--version-script'
2573
2574 # machine
2575 arch_default=$(uname -m)
2576 cpu="generic"
2577 intrinsics="none"
2578
2579 # OS
2580 target_os_default=$(tolower $(uname -s))
2581 host_os=$target_os_default
2582
2583 # configurable options
2584 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2585
2586 enable asm
2587 enable debug
2588 enable doc
2589 enable faan faandct faanidct
2590 enable optimizations
2591 enable safe_bitstream_reader
2592 enable static
2593 enable swscale_alpha
2594 enable valgrind_backtrace
2595
2596 # By default, enable only those hwaccels that have no external dependencies.
2597 enable d3d11va dxva2 vda vdpau
2598
2599 # internal components are enabled by default
2600 enable $EXTRALIBS_LIST
2601
2602 # Avoid external, non-system, libraries getting enabled by dependency resolution
2603 disable $EXTERNAL_LIBRARY_LIST
2604
2605 # build settings
2606 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2607 LIBPREF="lib"
2608 LIBSUF=".a"
2609 LIBNAME='$(LIBPREF)$(NAME)$(LIBSUF)'
2610 SLIBPREF="lib"
2611 SLIBSUF=".so"
2612 SLIBNAME='$(SLIBPREF)$(NAME)$(SLIBSUF)'
2613 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2614 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2615 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2616 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2617 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2618 VERSION_SCRIPT_POSTPROCESS_CMD="cat"
2619
2620 asflags_filter=echo
2621 cflags_filter=echo
2622 ldflags_filter=echo
2623
2624 AS_C='-c'
2625 AS_O='-o $@'
2626 CC_C='-c'
2627 CC_E='-E -o $@'
2628 CC_O='-o $@'
2629 OBJCC_C='-c'
2630 OBJCC_E='-E -o $@'
2631 OBJCC_O='-o $@'
2632 X86ASM_O='-o $@'
2633 LD_O='-o $@'
2634 LD_LIB='-l%'
2635 LD_PATH='-L'
2636 HOSTCC_C='-c'
2637 HOSTCC_E='-E -o $@'
2638 HOSTCC_O='-o $@'
2639 HOSTLD_O='-o $@'
2640
2641 host_extralibs='-lm'
2642 host_cflags_filter=echo
2643 host_ldflags_filter=echo
2644
2645 target_path='$(CURDIR)'
2646
2647 # since the object filename is not given with the -MM flag, the compiler
2648 # is only able to print the basename, and we must add the path ourselves
2649 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2650 DEPFLAGS='-MM'
2651
2652 mkdir -p avbuild
2653
2654 # find source path
2655 if test -f configure; then
2656     source_path=.
2657 else
2658     source_path=$(cd $(dirname "$0"); pwd)
2659     echo "$source_path" | grep -q '[[:blank:]]' &&
2660         die "Out of tree builds are impossible with whitespace in source path."
2661     test -e "$source_path/config.h" &&
2662         die "Out of tree builds are impossible with config.h in source dir."
2663 fi
2664
2665 for v in "$@"; do
2666     r=${v#*=}
2667     l=${v%"$r"}
2668     r=$(sh_quote "$r")
2669     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2670 done
2671
2672 find_things(){
2673     thing=$1
2674     pattern=$2
2675     file=$source_path/$3
2676     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2677 }
2678
2679 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2680 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2681 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2682 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2683 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2684 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2685 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2686 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2687 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2688
2689 find_things_extern(){
2690     thing=$1
2691     pattern=$2
2692     file=$source_path/$3
2693     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2694 }
2695
2696 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2697 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2698
2699 AVCODEC_COMPONENTS_LIST="
2700     $BSF_LIST
2701     $DECODER_LIST
2702     $ENCODER_LIST
2703     $HWACCEL_LIST
2704     $PARSER_LIST
2705 "
2706
2707 AVDEVICE_COMPONENTS_LIST="
2708     $INDEV_LIST
2709     $OUTDEV_LIST
2710 "
2711
2712 AVFILTER_COMPONENTS_LIST="
2713     $FILTER_LIST
2714 "
2715
2716 AVFORMAT_COMPONENTS_LIST="
2717     $DEMUXER_LIST
2718     $MUXER_LIST
2719     $PROTOCOL_LIST
2720 "
2721
2722 ALL_COMPONENTS="
2723     $AVCODEC_COMPONENTS_LIST
2724     $AVDEVICE_COMPONENTS_LIST
2725     $AVFILTER_COMPONENTS_LIST
2726     $AVFORMAT_COMPONENTS_LIST
2727 "
2728
2729 for n in $COMPONENT_LIST; do
2730     v=$(toupper ${n%s})_LIST
2731     eval enable \$$v
2732     eval ${n}_if_any="\$$v"
2733 done
2734
2735 enable $ARCH_EXT_LIST
2736
2737 die_unknown(){
2738     echo "Unknown option \"$1\"."
2739     echo "See $0 --help for available options."
2740     exit 1
2741 }
2742
2743 print_3_columns() {
2744     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2745 }
2746
2747 show_list() {
2748     suffix=_$1
2749     shift
2750     echo $* | sed s/$suffix//g | print_3_columns
2751     exit 0
2752 }
2753
2754 rand_list(){
2755     IFS=', '
2756     set -- $*
2757     unset IFS
2758     for thing; do
2759         comp=${thing%:*}
2760         prob=${thing#$comp}
2761         prob=${prob#:}
2762         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2763         echo "prob ${prob:-0.5}"
2764         printf '%s\n' $comp
2765     done
2766 }
2767
2768 do_random(){
2769     action=$1
2770     shift
2771     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2772     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2773 }
2774
2775 for opt do
2776     optval="${opt#*=}"
2777     case "$opt" in
2778         --extra-ldflags=*)
2779             add_ldflags $optval
2780         ;;
2781         --extra-ldexeflags=*)
2782             add_ldexeflags $optval
2783         ;;
2784         --extra-libs=*)
2785             add_extralibs $optval
2786         ;;
2787         --disable-devices)
2788             disable $INDEV_LIST $OUTDEV_LIST
2789         ;;
2790         --enable-debug=*)
2791             debuglevel="$optval"
2792         ;;
2793         --disable-programs)
2794             disable $PROGRAM_LIST
2795         ;;
2796         --disable-everything)
2797             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2798         ;;
2799         --disable-all)
2800             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2801             disable $LIBRARY_LIST $PROGRAM_LIST doc
2802         ;;
2803         --enable-random|--disable-random)
2804             action=${opt%%-random}
2805             do_random ${action#--} $COMPONENT_LIST
2806         ;;
2807         --enable-random=*|--disable-random=*)
2808             action=${opt%%-random=*}
2809             do_random ${action#--} $optval
2810         ;;
2811         --enable-*=*|--disable-*=*)
2812             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2813             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2814             eval list=\$$(toupper $thing)_LIST
2815             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2816             $action $(filter "$name" $list)
2817         ;;
2818         --enable-avserver|--disable-avserver*)
2819             warn "avserver has been removed, the ${opt} option is only"\
2820                  "provided for compatibility and will be removed in the future"
2821         ;;
2822         --enable-yasm|--disable-yasm)
2823             warn "The ${opt} option is only provided for compatibility and will be\n"\
2824                  "removed in the future. Use --enable-x86asm / --disable-x86asm instead."
2825             test $opt = --enable-yasm && x86asm=yes || x86asm=no
2826         ;;
2827         --enable-?*|--disable-?*)
2828             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2829             if is_in $option $COMPONENT_LIST; then
2830                 test $action = disable && action=unset
2831                 eval $action \$$(toupper ${option%s})_LIST
2832             elif is_in $option $CMDLINE_SELECT; then
2833                 $action $option
2834             else
2835                 die_unknown $opt
2836             fi
2837         ;;
2838         --list-*)
2839             NAME="${opt#--list-}"
2840             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2841             NAME=${NAME%s}
2842             eval show_list $NAME \$$(toupper $NAME)_LIST
2843         ;;
2844         --help|-h) show_help
2845         ;;
2846         --quiet|-q) quiet=yes
2847         ;;
2848         *)
2849             optname="${opt%%=*}"
2850             optname="${optname#--}"
2851             optname=$(echo "$optname" | sed 's/-/_/g')
2852             if is_in $optname $CMDLINE_SET; then
2853                 eval $optname='$optval'
2854             elif is_in $optname $CMDLINE_APPEND; then
2855                 append $optname "$optval"
2856             else
2857                 die_unknown $opt
2858             fi
2859         ;;
2860     esac
2861 done
2862
2863 for e in $env; do
2864     eval "export $e"
2865 done
2866
2867 disabled logging && logfile=/dev/null
2868
2869 # Die early if licensing-related configure options are incompatible.
2870 die_license_disabled() {
2871     enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
2872 }
2873
2874 map "die_license_disabled gpl"      $EXTERNAL_LIBRARY_GPL_LIST
2875 map "die_license_disabled nonfree"  $EXTERNAL_LIBRARY_NONFREE_LIST $HWACCEL_LIBRARY_NONFREE_LIST
2876 map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST
2877
2878 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
2879
2880 # Disable all the library-specific components if the library itself
2881 # is disabled, see AVCODEC_LIST and following _LIST variables.
2882
2883 disable_components(){
2884     disabled ${1} && disable $(
2885         eval components="\$$(toupper ${1})_COMPONENTS"
2886         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2887     )
2888 }
2889
2890 map 'disable_components $v' $LIBRARY_LIST
2891
2892 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2893 set >> $logfile
2894
2895 case "$toolchain" in
2896     *-asan)
2897         cc_default="${toolchain%-asan}"
2898         add_cflags  -fsanitize=address
2899         add_ldflags -fsanitize=address
2900     ;;
2901     *-msan)
2902         cc_default="${toolchain%-msan}"
2903         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2904         add_ldflags -fsanitize=memory
2905     ;;
2906     *-tsan)
2907         cc_default="${toolchain%-tsan}"
2908         add_cflags  -fsanitize=thread -fPIE
2909         add_ldflags -fsanitize=thread -pie
2910         case "$toolchain" in
2911             gcc-tsan)
2912                 add_cflags  -fPIC
2913                 add_ldflags -fPIC
2914                 ;;
2915         esac
2916     ;;
2917     *-usan)
2918         cc_default="${toolchain%-usan}"
2919         add_cflags  -fsanitize=undefined
2920         add_ldflags -fsanitize=undefined
2921         case "$toolchain" in
2922             clang-usan)
2923                 add_cflags -O1
2924                 ;;
2925         esac
2926     ;;
2927     valgrind-*)
2928         target_exec_default="valgrind"
2929         case "$toolchain" in
2930             valgrind-massif)
2931                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2932                 ;;
2933             valgrind-memcheck)
2934                 target_exec_args="--track-origins=yes --leak-check=full"
2935                 ;;
2936         esac
2937     ;;
2938     msvc)
2939         # Check whether the current MSVC version needs the C99 converter.
2940         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2941         # support enough of C99 to build libav. Default to the new
2942         # behaviour if the regexp was unable to match anything, since this
2943         # successfully parses the version number of existing supported
2944         # versions that require the converter (MSVC 2010 and 2012).
2945         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2946         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2947             cc_default="cl"
2948         else
2949             cc_default="c99wrap cl"
2950         fi
2951         ld_default="$source_path/compat/windows/mslink"
2952         nm_default="dumpbin -symbols"
2953         ar_default="lib"
2954         case "$arch" in
2955         arm*)
2956             as_default="armasm"
2957             ;;
2958         esac
2959         target_os_default="win32"
2960         # Use a relative path for TMPDIR. This makes sure all the
2961         # ffconf temp files are written with a relative path, avoiding
2962         # issues with msys/win32 path conversion for MSVC parameters
2963         # such as -Fo<file> or -out:<file>.
2964         TMPDIR=.
2965     ;;
2966     icl)
2967         cc_default="icl"
2968         ld_default="xilink"
2969         nm_default="dumpbin -symbols"
2970         ar_default="xilib"
2971         target_os_default="win32"
2972         TMPDIR=.
2973     ;;
2974     gcov)
2975         add_cflags  -fprofile-arcs -ftest-coverage
2976         add_ldflags -fprofile-arcs -ftest-coverage
2977     ;;
2978     llvm-cov)
2979         add_cflags -fprofile-arcs -ftest-coverage
2980         add_ldflags --coverage
2981     ;;
2982     hardened)
2983         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2984         add_cflags   -fno-strict-overflow -fstack-protector-all
2985         add_ldflags  -Wl,-z,relro -Wl,-z,now
2986     ;;
2987     ?*)
2988         die "Unknown toolchain $toolchain"
2989     ;;
2990 esac
2991
2992 test -n "$cross_prefix" && enable cross_compile
2993
2994 if enabled cross_compile; then
2995     test -n "$arch" && test -n "$target_os" ||
2996         die "Must specify target arch (--arch) and OS (--target-os) when cross-compiling"
2997 fi
2998
2999 ar_default="${cross_prefix}${ar_default}"
3000 cc_default="${cross_prefix}${cc_default}"
3001 objcc_default="${cross_prefix}${objcc_default}"
3002 x86asmexe_default="${cross_prefix}${x86asmexe_default}"
3003 nm_default="${cross_prefix}${nm_default}"
3004 pkg_config_default="${cross_prefix}${pkg_config_default}"
3005 ranlib="${cross_prefix}${ranlib}"
3006 strip="${cross_prefix}${strip}"
3007
3008 sysinclude_default="${sysroot}/usr/include"
3009
3010 set_default arch cc pkg_config sysinclude target_exec target_os x86asmexe
3011 enabled cross_compile || host_cc_default=$cc
3012 set_default host_cc
3013
3014 if ! $pkg_config --version >/dev/null 2>&1; then
3015     warn "$pkg_config not found, library detection may fail."
3016     pkg_config=false
3017 fi
3018
3019 exesuf() {
3020     case $1 in
3021         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
3022     esac
3023 }
3024
3025 EXESUF=$(exesuf $target_os)
3026 HOSTEXESUF=$(exesuf $host_os)
3027
3028 # set temporary file name
3029 : ${TMPDIR:=$TEMPDIR}
3030 : ${TMPDIR:=$TMP}
3031 : ${TMPDIR:=/tmp}
3032
3033 if ! check_cmd mktemp -u XXXXXX; then
3034     # simple replacement for missing mktemp
3035     # NOT SAFE FOR GENERAL USE
3036     mktemp(){
3037         tmpname="${2%%XXX*}.${HOSTNAME}.${UID}.$$"
3038         echo "$tmpname"
3039         mkdir "$tmpname"
3040     }
3041 fi
3042
3043 AVTMPDIR=$(mktemp -d "${TMPDIR}/avconf.XXXXXXXX" 2> /dev/null) ||
3044     die "Unable to create temporary directory in $TMPDIR."
3045
3046 tmpfile(){
3047     tmp="${AVTMPDIR}/test"$2
3048     (set -C; exec > $tmp) 2> /dev/null ||
3049         die "Unable to create temporary file in $AVTMPDIR."
3050     eval $1=$tmp
3051 }
3052
3053 trap 'rm -rf -- "$AVTMPDIR"' EXIT
3054 trap 'exit 2' INT
3055
3056 tmpfile TMPASM .asm
3057 tmpfile TMPC   .c
3058 tmpfile TMPE   $EXESUF
3059 tmpfile TMPH   .h
3060 tmpfile TMPO   .o
3061 tmpfile TMPS   .S
3062 tmpfile TMPSH  .sh
3063 tmpfile TMPV   .ver
3064
3065 unset -f mktemp
3066
3067 chmod +x $TMPE
3068
3069 # make sure we can execute files in $TMPDIR
3070 cat > $TMPSH 2>> $logfile <<EOF
3071 #! /bin/sh
3072 EOF
3073 chmod +x $TMPSH >> $logfile 2>&1
3074 if ! $TMPSH >> $logfile 2>&1; then
3075     cat <<EOF
3076 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
3077 variable to another directory and make sure that it is not mounted noexec.
3078 EOF
3079     die "Sanity test failed."
3080 fi
3081
3082 armasm_flags(){
3083     for flag; do
3084         case $flag in
3085             # Filter out MSVC cl.exe options from cflags that shouldn't
3086             # be passed to gas-preprocessor
3087             -M[TD]*)                                            ;;
3088             *)                  echo $flag                      ;;
3089         esac
3090    done
3091 }
3092
3093 ccc_flags(){
3094     for flag; do
3095         case $flag in
3096             -std=c99)           echo -c99                       ;;
3097             -mcpu=*)            echo -arch ${flag#*=}           ;;
3098             -mieee)             echo -ieee                      ;;
3099             -O*|-fast)          echo $flag                      ;;
3100             -fno-math-errno)    echo -assume nomath_errno       ;;
3101             -g)                 echo -g3                        ;;
3102             -Wall)              echo -msg_enable level2         ;;
3103             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
3104             -Wl,*)              echo $flag                      ;;
3105             -f*|-W*)                                            ;;
3106             *)                  echo $flag                      ;;
3107         esac
3108    done
3109 }
3110
3111 cparser_flags(){
3112     for flag; do
3113         case $flag in
3114             -Wno-switch)             echo -Wno-switch-enum ;;
3115             -Wno-format-zero-length) ;;
3116             -Wdisabled-optimization) ;;
3117             -Wno-pointer-sign)       echo -Wno-other ;;
3118             *)                       echo $flag ;;
3119         esac
3120     done
3121 }
3122
3123 msvc_common_flags(){
3124     for flag; do
3125         case $flag in
3126             # In addition to specifying certain flags under the compiler
3127             # specific filters, they must be specified here as well or else the
3128             # generic catch all at the bottom will print the original flag.
3129             -Wall)                ;;
3130             -Wextra)              ;;
3131             -std=c99)             ;;
3132             # Common flags
3133             -fomit-frame-pointer) ;;
3134             -g)                   echo -Z7 ;;
3135             -fno-math-errno)      ;;
3136             -fno-common)          ;;
3137             -fno-signed-zeros)    ;;
3138             -fPIC)                ;;
3139             -mthumb)              ;;
3140             -march=*)             ;;
3141             -lz)                  echo zlib.lib ;;
3142             -lx264)               echo libx264.lib ;;
3143             -l*)                  echo ${flag#-l}.lib ;;
3144             -L*)                  echo -libpath:${flag#-L} ;;
3145             *)                    echo $flag ;;
3146         esac
3147     done
3148 }
3149
3150 msvc_flags(){
3151     msvc_common_flags "$@"
3152     for flag; do
3153         case $flag in
3154             -Wall)                echo -W3 -wd4018 -wd4146 -wd4244 -wd4305     \
3155                                        -wd4554 ;;
3156             -Wextra)              echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3157                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3158                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3159                                        -wd4273 -wd4554 -wd4701 -wd4703 ;;
3160         esac
3161     done
3162 }
3163
3164 icl_flags(){
3165     msvc_common_flags "$@"
3166     for flag; do
3167         case $flag in
3168             # Despite what Intel's documentation says -Wall, which is supported
3169             # on Windows, does enable remarks so disable them here.
3170             -Wall)                echo $flag -Qdiag-disable:remark ;;
3171             -std=c99)             echo -Qstd=c99 ;;
3172         esac
3173     done
3174 }
3175
3176 pgi_flags(){
3177     for flag; do
3178         case $flag in
3179             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3180             -fomit-frame-pointer) echo -Mnoframe ;;
3181             -g)                   echo -gopt ;;
3182             *)                    echo $flag ;;
3183         esac
3184     done
3185 }
3186
3187 suncc_flags(){
3188     for flag; do
3189         case $flag in
3190             -march=*|-mcpu=*)
3191                 case "${flag#*=}" in
3192                     native)                   echo -xtarget=native       ;;
3193                     v9|niagara)               echo -xarch=sparc          ;;
3194                     ultrasparc)               echo -xarch=sparcvis       ;;
3195                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3196                     i586|pentium)             echo -xchip=pentium        ;;
3197                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3198                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3199                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3200                     pentium4*)          echo -xtarget=pentium4           ;;
3201                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3202                     *-sse3)             echo -xarch=sse3                 ;;
3203                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3204                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3205                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3206                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3207                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3208                     k8|opteron|athlon64|athlon-fx)
3209                                                echo -xarch=sse2a         ;;
3210                     athlon*)                   echo -xarch=pentium_proa  ;;
3211                 esac
3212                 ;;
3213             -std=c99)             echo -xc99              ;;
3214             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3215             -fPIC)                echo -KPIC -xcode=pic32 ;;
3216             -W*,*)                echo $flag              ;;
3217             -f*-*|-W*|-mimpure-text)                      ;;
3218             -shared)              echo -G                 ;;
3219             *)                    echo $flag              ;;
3220         esac
3221     done
3222 }
3223
3224 tms470_flags(){
3225     for flag; do
3226         case $flag in
3227             -march=*|-mcpu=*)
3228                 case "${flag#*=}" in
3229                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3230                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3231                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3232                     armv6*|arm11*)          echo -mv=6   ;;
3233                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3234                                             echo -mv=5e  ;;
3235                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3236                 esac
3237                 ;;
3238             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3239             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3240             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3241             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3242             -msoft-float)   echo --float_support=vfplib       ;;
3243             -O[0-3]|-mf=*)  echo $flag                        ;;
3244             -g)             echo -g -mn                       ;;
3245             -pds=*)         echo $flag                        ;;
3246             -D*|-I*)        echo $flag                        ;;
3247             --gcc|--abi=*)  echo $flag                        ;;
3248             -me)            echo $flag                        ;;
3249         esac
3250     done
3251 }
3252
3253 probe_cc(){
3254     pfx=$1
3255     _cc=$2
3256
3257     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3258     unset _ld_o _ldflags _ld_lib _ld_path
3259     unset _depflags _DEPCMD _DEPFLAGS
3260     _flags_filter=echo
3261
3262     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3263         _type=llvm_gcc
3264         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3265         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3266         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3267         _cflags_speed='-O3'
3268         _cflags_size='-Os'
3269     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3270         _type=gcc
3271         gcc_version=$($_cc --version | head -n1)
3272         gcc_basever=$($_cc -dumpversion)
3273         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3274         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3275         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3276         if ! $_cc -dumpversion | grep -q '^2\.'; then
3277             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3278         fi
3279         _cflags_speed='-O3'
3280         _cflags_size='-Os'
3281     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3282         _type=icc
3283         _ident=$($_cc --version | head -n1)
3284         _depflags='-MMD'
3285         _cflags_speed='-O3'
3286         _cflags_size='-Os'
3287         _cflags_noopt='-O1'
3288     elif $_cc -v 2>&1 | grep -q xlc; then
3289         _type=xlc
3290         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3291         _cflags_speed='-O5'
3292         _cflags_size='-O5 -qcompact'
3293     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3294         _type=ccc
3295         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3296         _DEPFLAGS='-M'
3297         _cflags_speed='-fast'
3298         _cflags_size='-O1'
3299         _flags_filter=ccc_flags
3300     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3301         test -d "$sysroot" || die "No valid sysroot specified."
3302         _type=armcc
3303         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3304         armcc_conf="$PWD/armcc.conf"
3305         $_cc --arm_linux_configure                 \
3306              --arm_linux_config_file="$armcc_conf" \
3307              --configure_sysroot="$sysroot"        \
3308              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3309              die "Error creating armcc configuration file."
3310         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3311         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3312         as_default="${cross_prefix}gcc"
3313         _depflags='-MMD'
3314         _cflags_speed='-O3'
3315         _cflags_size='-Os'
3316     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3317         _type=tms470
3318         _ident=$($_cc -version | head -n1 | tr -s ' ')
3319         _flags='--gcc --abi=eabi -me'
3320         _cc_e='-ppl -fe=$@'
3321         _cc_o='-fe=$@'
3322         _depflags='-ppa -ppd=$(@:.o=.d)'
3323         _cflags_speed='-O3 -mf=5'
3324         _cflags_size='-O3 -mf=2'
3325         _flags_filter=tms470_flags
3326     elif $_cc -v 2>&1 | grep -q clang; then
3327         _type=clang
3328         _ident=$($_cc --version 2>/dev/null | head -n1)
3329         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3330         _cflags_speed='-O3'
3331         _cflags_size='-Os'
3332     elif $_cc -V 2>&1 | grep -q Sun; then
3333         _type=suncc
3334         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3335         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3336         _DEPFLAGS='-xM1 -xc99'
3337         _ldflags='-std=c99'
3338         _cflags_speed='-O5'
3339         _cflags_size='-O5 -xspace'
3340         _flags_filter=suncc_flags
3341     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3342         _type=pathscale
3343         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3344         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3345         _cflags_speed='-O2'
3346         _cflags_size='-Os'
3347         _flags_filter='filter_out -Wdisabled-optimization'
3348     elif $_cc -v 2>&1 | grep -q Open64; then
3349         _type=open64
3350         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3351         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3352         _cflags_speed='-O2'
3353         _cflags_size='-Os'
3354         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3355     elif $_cc -V 2>&1 | grep -q Portland; then
3356         _type=pgi
3357         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3358         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3359         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3360         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3361         _cflags_noopt="-O1"
3362         _flags_filter=pgi_flags
3363     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3364         _type=armasm
3365         _ident=$($_cc | head -n1)
3366         # 4509: "This form of conditional instruction is deprecated"
3367         _flags="-nologo -ignore 4509"
3368         _flags_filter=armasm_flags
3369     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3370         _type=msvc
3371         _ident=$($_cc 2>&1 | head -n1)
3372         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3373         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3374         _cflags_speed="-O2"
3375         _cflags_size="-O1"
3376         _cflags_noopt="-O1"
3377         if $_cc -nologo- 2>&1 | grep -q Linker; then
3378             _ld_o='-out:$@'
3379         else
3380             _ld_o='-Fe$@'
3381         fi
3382         _cc_o='-Fo$@'
3383         _cc_e='-P -Fi$@'
3384         _flags_filter=msvc_flags
3385         _ld_lib='lib%.a'
3386         _ld_path='-libpath:'
3387         _flags='-nologo'
3388     elif $_cc 2>&1 | grep -q Intel; then
3389         _type=icl
3390         _ident=$($_cc 2>&1 | head -n1)
3391         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3392         # Not only is O3 broken on 13.x+ but it is slower on all previous
3393         # versions (tested) as well.
3394         _cflags_speed="-O2"
3395         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3396         if $_cc 2>&1 | grep -q Linker; then
3397             _ld_o='-out:$@'
3398         else
3399             _ld_o='-Fe$@'
3400         fi
3401         _cc_o='-Fo$@'
3402         _cc_e='-P'
3403         _flags_filter=icl_flags
3404         _ld_lib='lib%.a'
3405         _ld_path='-libpath:'
3406         # -Qdiag-error to make icl error when seeing certain unknown arguments
3407         _flags='-nologo -Qdiag-error:4044,10157'
3408         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3409         # with MSVC which enables it by default.
3410         _cflags='-Qms0 -Qvec- -Qsimd- -GS'
3411     elif $_cc -? 2>/dev/null | grep -q 'LLVM.*Linker'; then
3412         # lld can emulate multiple different linkers; in ms link.exe mode,
3413         # the -? parameter gives the help output which contains an identifyable
3414         # string, while it gives an error in other modes.
3415         _type=lld-link
3416         # The link.exe mode doesn't have a switch for getting the version,
3417         # but we can force it back to gnu mode and get the version from there.
3418         _ident=$($_cc -flavor gnu --version 2>/dev/null)
3419         _ld_o='-out:$@'
3420         _flags_filter=msvc_flags
3421         _ld_lib='lib%.a'
3422         _ld_path='-libpath:'
3423     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3424         _type=cparser
3425         _ident=$($_cc --version | head -n1)
3426         _depflags='-MMD'
3427         _cflags_speed='-O4'
3428         _cflags_size='-O2'
3429         _flags_filter=cparser_flags
3430     fi
3431
3432     eval ${pfx}_type=\$_type
3433     eval ${pfx}_ident=\$_ident
3434 }
3435
3436 set_ccvars(){
3437     eval ${1}_C=\${_cc_c-\${${1}_C}}
3438     eval ${1}_E=\${_cc_e-\${${1}_E}}
3439     eval ${1}_O=\${_cc_o-\${${1}_O}}
3440
3441     if [ -n "$_depflags" ]; then
3442         eval ${1}_DEPFLAGS=\$_depflags
3443     else
3444         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3445         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3446         eval DEP${1}FLAGS=\$_flags
3447     fi
3448 }
3449
3450 probe_cc cc "$cc"
3451 cflags_filter=$_flags_filter
3452 cflags_speed=$_cflags_speed
3453 cflags_size=$_cflags_size
3454 cflags_noopt=$_cflags_noopt
3455 add_cflags $_flags $_cflags
3456 cc_ldflags=$_ldflags
3457 set_ccvars CC
3458
3459 probe_cc hostcc "$host_cc"
3460 host_cflags_filter=$_flags_filter
3461 host_cflags_speed=$_cflags_speed
3462 add_host_cflags  $_flags $_cflags
3463 set_ccvars HOSTCC
3464
3465 test -n "$cc_type" && enable $cc_type ||
3466     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3467
3468 : ${as_default:=$cc}
3469 : ${objcc_default:=$cc}
3470 : ${dep_cc_default:=$cc}
3471 : ${ld_default:=$cc}
3472 : ${host_ld_default:=$host_cc}
3473 set_default ar as objcc dep_cc ld host_ld
3474
3475 probe_cc as "$as"
3476 asflags_filter=$_flags_filter
3477 add_asflags $_flags $_cflags
3478 set_ccvars AS
3479
3480 probe_cc objcc "$objcc"
3481 objcflags_filter=$_flags_filter
3482 add_objcflags $_flags $_cflags
3483 set_ccvars OBJC
3484
3485 probe_cc ld "$ld"
3486 ldflags_filter=$_flags_filter
3487 add_ldflags $_flags $_ldflags
3488 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3489 LD_O=${_ld_o-$LD_O}
3490 LD_LIB=${_ld_lib-$LD_LIB}
3491 LD_PATH=${_ld_path-$LD_PATH}
3492
3493 probe_cc hostld "$host_ld"
3494 host_ldflags_filter=$_flags_filter
3495 add_host_ldflags $_flags $_ldflags
3496 HOSTLD_O=${_ld_o-$HOSTLD_O}
3497
3498 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3499     probe_cc depcc "$dep_cc"
3500     CCDEP=${_DEPCMD:-$DEPCMD}
3501     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3502     DEPCCFLAGS=$_flags
3503 fi
3504
3505 if $ar 2>&1 | grep -q Microsoft; then
3506     arflags="-nologo"
3507     ar_o='-out:$@'
3508 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3509     arflags="rq"
3510     ar_o='$@'
3511 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3512     arflags='-Xany -r -c'
3513     ar_o='$@'
3514 else
3515     arflags="rc"
3516     ar_o='$@'
3517 fi
3518
3519 add_cflags $extra_cflags
3520 add_objcflags $extra_objcflags
3521 add_asflags $extra_cflags
3522
3523 if test -n "$sysroot"; then
3524     case "$cc_type" in
3525         gcc|llvm_gcc|clang)
3526             add_cppflags --sysroot="$sysroot"
3527             add_ldflags --sysroot="$sysroot"
3528         ;;
3529         tms470)
3530             add_cppflags -I"$sysinclude"
3531             add_ldflags  --sysroot="$sysroot"
3532         ;;
3533     esac
3534 fi
3535
3536 if test "$cpu" = host; then
3537     enabled cross_compile &&
3538         die "--cpu=host makes no sense when cross-compiling."
3539
3540     case "$cc_type" in
3541         gcc|llvm_gcc)
3542             check_native(){
3543                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3544                 sed -n "/cc1.*$1=/{
3545                             s/.*$1=\\([^ ]*\\).*/\\1/
3546                             p
3547                             q
3548                         }" $TMPE
3549             }
3550             cpu=$(check_native -march || check_native -mcpu)
3551         ;;
3552     esac
3553
3554     test "${cpu:-host}" = host &&
3555         die "--cpu=host not supported with compiler $cc"
3556 fi
3557
3558 # Deal with common $arch aliases
3559 case "$arch" in
3560     aarch64|arm64)
3561         arch="aarch64"
3562     ;;
3563     arm*)
3564         arch="arm"
3565     ;;
3566     mips*|IP*)
3567         case "$arch" in
3568         *el)
3569             add_cppflags -EL
3570             add_ldflags -EL
3571         ;;
3572         *eb)
3573             add_cppflags -EB
3574             add_ldflags -EB
3575         ;;
3576         esac
3577         arch="mips"
3578     ;;
3579     parisc*|hppa*)
3580         arch="parisc"
3581     ;;
3582     "Power Macintosh"|ppc*|powerpc*)
3583         arch="ppc"
3584     ;;
3585     s390|s390x)
3586         arch="s390"
3587     ;;
3588     sh4|sh)
3589         arch="sh4"
3590     ;;
3591     sun4u|sparc*)
3592         arch="sparc"
3593     ;;
3594     tilegx|tile-gx)
3595         arch="tilegx"
3596     ;;
3597     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3598         arch="x86"
3599     ;;
3600 esac
3601
3602 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3603 enable $arch
3604
3605 # Add processor-specific flags
3606 if enabled aarch64; then
3607
3608     case $cpu in
3609         armv*)
3610             cpuflags="-march=$cpu"
3611         ;;
3612         *)
3613             cpuflags="-mcpu=$cpu"
3614         ;;
3615     esac
3616
3617 elif enabled alpha; then
3618
3619     cpuflags="-mcpu=$cpu"
3620
3621 elif enabled arm; then
3622
3623     check_arm_arch() {
3624         check_cpp_condition stddef.h \
3625             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3626             $cpuflags
3627     }
3628
3629     probe_arm_arch() {
3630         if   check_arm_arch 4;        then echo armv4
3631         elif check_arm_arch 4T;       then echo armv4t
3632         elif check_arm_arch 5;        then echo armv5
3633         elif check_arm_arch 5E;       then echo armv5e
3634         elif check_arm_arch 5T;       then echo armv5t
3635         elif check_arm_arch 5TE;      then echo armv5te
3636         elif check_arm_arch 5TEJ;     then echo armv5te
3637         elif check_arm_arch 6;        then echo armv6
3638         elif check_arm_arch 6J;       then echo armv6j
3639         elif check_arm_arch 6K;       then echo armv6k
3640         elif check_arm_arch 6Z;       then echo armv6z
3641         elif check_arm_arch 6ZK;      then echo armv6zk
3642         elif check_arm_arch 6T2;      then echo armv6t2
3643         elif check_arm_arch 7;        then echo armv7
3644         elif check_arm_arch 7A  7_A;  then echo armv7-a
3645         elif check_arm_arch 7S;       then echo armv7-a
3646         elif check_arm_arch 7R  7_R;  then echo armv7-r
3647         elif check_arm_arch 7M  7_M;  then echo armv7-m
3648         elif check_arm_arch 7EM 7E_M; then echo armv7-m
3649         elif check_arm_arch 8A  8_A;  then echo armv8-a
3650         fi
3651     }
3652
3653     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3654
3655     case $cpu in
3656         armv*)
3657             cpuflags="-march=$cpu"
3658             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3659         ;;
3660         *)
3661             cpuflags="-mcpu=$cpu"
3662             case $cpu in
3663                 cortex-a*)                               subarch=armv7a  ;;
3664                 cortex-r*)                               subarch=armv7r  ;;
3665                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3666                 arm11*)                                  subarch=armv6   ;;
3667                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3668                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3669                 *)                             subarch=$(probe_arm_arch) ;;
3670             esac
3671         ;;
3672     esac
3673
3674     case "$subarch" in
3675         armv5t*)    enable fast_clz                ;;
3676         armv[6-8]*) enable fast_clz fast_unaligned ;;
3677     esac
3678
3679 elif enabled avr32; then
3680
3681     case $cpu in
3682         ap7[02]0[0-2])
3683             subarch="avr32_ap"
3684             cpuflags="-mpart=$cpu"
3685         ;;
3686         ap)
3687             subarch="avr32_ap"
3688             cpuflags="-march=$cpu"
3689         ;;
3690         uc3[ab]*)
3691             subarch="avr32_uc"
3692             cpuflags="-mcpu=$cpu"
3693         ;;
3694         uc)
3695             subarch="avr32_uc"
3696             cpuflags="-march=$cpu"
3697         ;;
3698     esac
3699
3700 elif enabled bfin; then
3701
3702     cpuflags="-mcpu=$cpu"
3703
3704 elif enabled mips; then
3705
3706     cpuflags="-march=$cpu"
3707
3708 elif enabled ppc; then
3709
3710     disable ldbrx
3711
3712     case $(tolower $cpu) in
3713         601|ppc601|powerpc601)
3714             cpuflags="-mcpu=601"
3715             disable altivec
3716         ;;
3717         603*|ppc603*|powerpc603*)
3718             cpuflags="-mcpu=603"
3719             disable altivec
3720         ;;
3721         604*|ppc604*|powerpc604*)
3722             cpuflags="-mcpu=604"
3723             disable altivec
3724         ;;
3725         g3|75*|ppc75*|powerpc75*)
3726             cpuflags="-mcpu=750"
3727             disable altivec
3728         ;;
3729         g4|745*|ppc745*|powerpc745*)
3730             cpuflags="-mcpu=7450"
3731             disable vsx
3732         ;;
3733         74*|ppc74*|powerpc74*)
3734             cpuflags="-mcpu=7400"
3735             disable vsx
3736         ;;
3737         g5|970|ppc970|powerpc970)
3738             cpuflags="-mcpu=970"
3739             disable vsx
3740         ;;
3741         power[3-6]*)
3742             cpuflags="-mcpu=$cpu"
3743             disable vsx
3744         ;;
3745         power[7-8]*)
3746             cpuflags="-mcpu=$cpu"
3747             enable ldbrx
3748         ;;
3749         cell)
3750             cpuflags="-mcpu=cell"
3751             enable ldbrx
3752             disable vsx
3753         ;;
3754         e500mc)
3755             cpuflags="-mcpu=e500mc"
3756             disable altivec
3757         ;;
3758         e500v2)
3759             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3760             disable altivec
3761             disable dcbzl
3762         ;;
3763         e500)
3764             cpuflags="-mcpu=8540 -mhard-float"
3765             disable altivec
3766             disable dcbzl
3767         ;;
3768     esac
3769
3770 elif enabled sparc; then
3771
3772     case $cpu in
3773         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3774             cpuflags="-mcpu=$cpu"
3775         ;;
3776         ultrasparc*|niagara[234])
3777             cpuflags="-mcpu=$cpu"
3778         ;;
3779     esac
3780
3781 elif enabled x86; then
3782
3783     case $cpu in
3784         i[345]86|pentium)
3785             cpuflags="-march=$cpu"
3786             disable i686
3787             disable mmx
3788         ;;
3789         # targets that do NOT support nopl and conditional mov (cmov)
3790         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3791             cpuflags="-march=$cpu"
3792             disable i686
3793         ;;
3794         # targets that do support nopl and conditional mov (cmov)
3795         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3796             cpuflags="-march=$cpu"
3797             enable i686
3798             enable fast_cmov
3799         ;;
3800         # targets that do support conditional mov but on which it's slow
3801         pentium4|pentium4m|prescott|nocona)
3802             cpuflags="-march=$cpu"
3803             enable i686
3804             disable fast_cmov
3805         ;;
3806     esac
3807
3808 fi
3809
3810 if [ "$cpu" != generic ]; then
3811     add_cflags  $cpuflags
3812     add_asflags $cpuflags
3813     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3814 fi
3815
3816 # compiler sanity check
3817 check_exec <<EOF
3818 int main(void){ return 0; }
3819 EOF
3820 if test "$?" != 0; then
3821     echo "$cc is unable to create an executable file."
3822     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3823         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3824         echo "Only do this if you know what cross compiling means."
3825     fi
3826     die "C compiler test failed."
3827 fi
3828
3829 add_cppflags -D_ISOC99_SOURCE
3830
3831 # some compilers silently accept -std=c11, so we also need to check that the
3832 # version macro is defined properly
3833 check_cpp_condition stdlib.h  "__STDC_VERSION__ >= 201112L" -std=c11 &&
3834     add_cflags -std=c11 ||
3835     check_cflags -std=c99
3836
3837 check_cppflags -D_FILE_OFFSET_BITS=64
3838 check_cppflags -D_LARGEFILE_SOURCE
3839
3840 add_host_cppflags -D_ISOC99_SOURCE
3841 check_host_cflags -std=c99
3842 check_host_cflags -Wall
3843 check_host_cflags $host_cflags_speed
3844
3845 check_64bit(){
3846     arch32=$1
3847     arch64=$2
3848     expr=$3
3849     check_code cc "" "int test[2*($expr) - 1]" &&
3850         subarch=$arch64 || subarch=$arch32
3851 }
3852
3853 case "$arch" in
3854     aarch64|alpha|ia64)
3855         spic=$shared
3856     ;;
3857     mips)
3858         check_64bit mips mips64 '_MIPS_SIM > 1'
3859         spic=$shared
3860     ;;
3861     parisc)
3862         check_64bit parisc parisc64 'sizeof(void *) > 4'
3863         spic=$shared
3864     ;;
3865     ppc)
3866         check_64bit ppc ppc64 'sizeof(void *) > 4'
3867         spic=$shared
3868     ;;
3869     s390)
3870         check_64bit s390 s390x 'sizeof(void *) > 4'
3871         spic=$shared
3872     ;;
3873     sparc)
3874         check_64bit sparc sparc64 'sizeof(void *) > 4'
3875         spic=$shared
3876     ;;
3877     x86)
3878         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3879         if test "$subarch" = "x86_64"; then
3880             spic=$shared
3881         fi
3882     ;;
3883 esac
3884
3885 enable $subarch
3886 enabled spic && enable_weak pic
3887
3888 enabled x86_64 && objformat=elf64 || objformat="elf32"
3889
3890 # OS specific
3891 case $target_os in
3892     aix)
3893         SHFLAGS=-shared
3894         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3895         enabled shared && add_ldflags -Wl,-brtl
3896         ;;
3897     android)
3898         disable symver
3899         enable section_data_rel_ro
3900         SLIB_INSTALL_NAME='$(SLIBNAME)'
3901         SLIB_INSTALL_LINKS=
3902         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3903         ;;
3904     haiku)
3905         prefix_default="/boot/common"
3906         network_extralibs="-lnetwork"
3907         host_extralibs=
3908         ;;
3909     sunos)
3910         SHFLAGS='-shared -Wl,-h,$$(@F)'
3911         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3912         network_extralibs="-lsocket -lnsl"
3913         # When using suncc to build, the Solaris linker will mark
3914         # an executable with each instruction set encountered by
3915         # the Solaris assembler.  As our libraries contain their own
3916         # guards for processor-specific code, instead suppress
3917         # generation of the HWCAPS ELF section on Solaris x86 only.
3918         enabled_all suncc x86 &&
3919             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3920             add_ldflags -Wl,-M,mapfile
3921         nm_default='nm -P -g'
3922         version_script='-M'
3923         VERSION_SCRIPT_POSTPROCESS_CMD='perl $(SRC_PATH)/compat/solaris/make_sunver.pl - $(OBJS)'
3924         ;;
3925     netbsd)
3926         disable symver
3927         oss_indev_extralibs="-lossaudio"
3928         oss_outdev_extralibs="-lossaudio"
3929         ;;
3930     openbsd|bitrig)
3931         disable symver
3932         SHFLAGS='-shared'
3933         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3934         SLIB_INSTALL_LINKS=
3935         oss_indev_extralibs="-lossaudio"
3936         oss_outdev_extralibs="-lossaudio"
3937         ;;
3938     dragonfly)
3939         disable symver
3940         ;;
3941     freebsd)
3942         ;;
3943     bsd/os)
3944         add_extralibs -lpoll -lgnugetopt
3945         ;;
3946     darwin)
3947         enabled ppc && add_asflags -force_cpusubtype_ALL
3948         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3949         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3950         add_ldflags -Wl,-dynamic,-search_paths_first
3951         check_ldflags -Wl,-no_weak_imports
3952         SLIBSUF=".dylib"
3953         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME).$(LIBVERSION)$(SLIBSUF)'
3954         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME).$(LIBMAJOR)$(SLIBSUF)'
3955         enabled x86_64 && objformat="macho64" || objformat="macho32"
3956         enabled_any pic shared ||
3957             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3958         check_header dispatch/dispatch.h &&
3959             add_cppflags '-I\$(SRC_PATH)/compat/dispatch_semaphore'
3960         ;;
3961     msys*)
3962         die "Native MSYS builds are discouraged, please use the MINGW environment."
3963         ;;
3964     mingw32*|mingw64*)
3965         if test $target_os = "mingw32ce"; then
3966             disable network
3967         else
3968             target_os=mingw32
3969         fi
3970         LIBTARGET=i386
3971         if enabled x86_64; then
3972             LIBTARGET="i386:x86-64"
3973         elif enabled arm; then
3974             LIBTARGET=arm-wince
3975         fi
3976         check_ldflags -Wl,--nxcompat
3977         check_ldflags -Wl,--dynamicbase
3978         shlibdir_default="$bindir_default"
3979         SLIBPREF=""
3980         SLIBSUF=".dll"
3981         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3982         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3983         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3984         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3985         SLIB_INSTALL_LINKS=
3986         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3987         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3988         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3989         enabled x86_64 && objformat="win64" || objformat="win32"
3990         dlltool="${cross_prefix}dlltool"
3991         ranlib=:
3992         enable dos_paths
3993         ;;
3994     win32|win64)
3995         disable symver
3996         if enabled shared; then
3997             # Link to the import library instead of the normal static library
3998             # for shared libs.
3999             LD_LIB='%.lib'
4000             # Cannot build both shared and static libs with MSVC or icl.
4001             disable static
4002         fi
4003         shlibdir_default="$bindir_default"
4004         SLIBPREF=""
4005         SLIBSUF=".dll"
4006         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
4007         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
4008         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
4009         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4010         SLIB_INSTALL_LINKS=
4011         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
4012         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
4013         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
4014         enabled x86_64 && objformat="win64" || objformat="win32"
4015         ranlib=:
4016         enable dos_paths
4017         ;;
4018     cygwin*)
4019         target_os=cygwin
4020         shlibdir_default="$bindir_default"
4021         SLIBPREF="cyg"
4022         SLIBSUF=".dll"
4023         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
4024         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
4025         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4026         SLIB_INSTALL_LINKS=
4027         SLIB_INSTALL_EXTRA_LIB='lib$(NAME).dll.a'
4028         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(NAME).dll.a'
4029         enabled x86_64 && objformat="win64" || objformat="win32"
4030         enable dos_paths
4031         ;;
4032     *-dos|freedos|opendos)
4033         network_extralibs="-lsocket"
4034         objformat="coff"
4035         enable dos_paths
4036         add_cppflags -U__STRICT_ANSI__
4037         ;;
4038     linux)
4039         enable dv1394
4040         enable section_data_rel_ro
4041         ;;
4042     irix*)
4043         target_os=irix
4044         ranlib="echo ignoring ranlib"
4045         ;;
4046     os/2*)
4047         ln_s="cp -f"
4048         objformat="aout"
4049         add_cppflags -D_GNU_SOURCE
4050         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zhigh-mem -Zmap
4051         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
4052         LIBSUF="_s.a"
4053         SLIBPREF=""
4054         SLIBSUF=".dll"
4055         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
4056         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
4057         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
4058             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
4059             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
4060             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
4061             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
4062         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
4063             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
4064         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
4065         enable dos_paths
4066         ;;
4067     gnu/kfreebsd)
4068         add_cppflags -D_BSD_SOURCE
4069         ;;
4070     gnu)
4071         ;;
4072     qnx)
4073         add_cppflags -D_QNX_SOURCE
4074         network_extralibs="-lsocket"
4075         ;;
4076     symbian)
4077         SLIBSUF=".dll"
4078         enable dos_paths
4079         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
4080         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
4081         add_ldflags -Wl,--target1-abs,--no-undefined \
4082                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
4083                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
4084         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
4085                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
4086                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
4087         ;;
4088     osf1)
4089         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
4090         ;;
4091     minix)
4092         ;;
4093     none)
4094         ;;
4095     *)
4096         die "Unknown OS '$target_os'."
4097         ;;
4098 esac
4099
4100 # determine libc flavour
4101
4102 probe_libc(){
4103     pfx=$1
4104     pfx_no_=${pfx%_}
4105     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
4106     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
4107         eval ${pfx}libc_type=uclibc
4108         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4109     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
4110         eval ${pfx}libc_type=glibc
4111         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4112     # MinGW headers can be installed on Cygwin, so check for newlib first.
4113     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
4114         eval ${pfx}libc_type=newlib
4115         add_${pfx}cppflags -U__STRICT_ANSI__ -D_XOPEN_SOURCE=600
4116     # MinGW64 is backwards compatible with MinGW32, so check for it first.
4117     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
4118         eval ${pfx}libc_type=mingw64
4119         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4120         eval test \$${pfx_no_}cc_type = "gcc" &&
4121             add_${pfx}cppflags -D__printf__=__gnu_printf__
4122     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
4123          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
4124         eval ${pfx}libc_type=mingw32
4125         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
4126             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
4127             die "ERROR: MinGW32 runtime version must be >= 3.15."
4128         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4129         check_${pfx}cpp_condition _mingw.h "__MSVCRT_VERSION__ < 0x0700__" &&
4130             add_${pfx}cppflags -D__MSVCRT_VERSION__=0x0700
4131         eval test \$${pfx_no_}cc_type = "gcc" &&
4132             add_${pfx}cppflags -D__printf__=__gnu_printf__
4133     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
4134         eval ${pfx}libc_type=msvcrt
4135         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
4136             if [ "$pfx" = host_ ]; then
4137                 add_host_cppflags -Dsnprintf=_snprintf
4138             else
4139                 add_compat strtod.o strtod=avpriv_strtod
4140                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
4141                                              _snprintf=avpriv_snprintf  \
4142                                              vsnprintf=avpriv_vsnprintf
4143             fi
4144         fi
4145         add_${pfx}cppflags -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS
4146         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
4147         # 0x601 by default unless something else is set by the user.
4148         # This can easily lead to us detecting functions only present
4149         # in such new versions and producing binaries requiring windows 7.0.
4150         # Therefore explicitly set the default to XP unless the user has
4151         # set something else on the command line.
4152         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
4153         # family. For these cases, configure is free to use any functions
4154         # found in the SDK headers by default. (Alternatively, we could force
4155         # _WIN32_WINNT to 0x0602 in that case.)
4156         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
4157             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
4158 #ifdef WINAPI_FAMILY
4159 #include <winapifamily.h>
4160 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4161 #error not desktop
4162 #endif
4163 #endif
4164 EOF
4165         if [ "$pfx" = "" ]; then
4166             check_func strtoll || add_cflags -Dstrtoll=_strtoi64
4167         fi
4168     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4169         eval ${pfx}libc_type=klibc
4170     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4171         eval ${pfx}libc_type=bionic
4172     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4173         eval ${pfx}libc_type=solaris
4174         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4175     else
4176         eval ${pfx}libc_type=default
4177         add_${pfx}cppflags -D_DEFAULT_SOURCE
4178     fi
4179 }
4180
4181 probe_libc
4182 test -n "$libc_type" && enable libc_$libc_type
4183 probe_libc host_
4184 test -n "$host_libc_type" && enable host_libc_$host_libc_type
4185
4186 # hacks for compiler/libc/os combinations
4187
4188 case $libc_type in
4189     bionic)
4190         add_compat strtod.o strtod=avpriv_strtod
4191         ;;
4192     glibc)
4193         if enabled tms470; then
4194             CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4195             add_cppflags -D__USER_LABEL_PREFIX__=
4196             add_cppflags -D__builtin_memset=memset
4197             add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4198             add_cflags   -pds=48    # incompatible redefinition of macro
4199         elif enabled ccc; then
4200             add_ldflags -Wl,-z,now  # calls to libots crash without this
4201         fi
4202         ;;
4203 esac
4204
4205 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4206     add_cppflags '-I\$(SRC_PATH)/compat/float'
4207
4208 esc(){
4209     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4210 }
4211
4212 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" > avbuild/config.fate
4213
4214 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4215
4216 set_default $PATHS_LIST
4217 set_default nm
4218
4219 # we need to build at least one lib type
4220 if ! enabled_any static shared; then
4221     cat <<EOF
4222 At least one library type must be built.
4223 Specify --enable-static to build the static libraries or --enable-shared to
4224 build the shared libraries as well. To only build the shared libraries specify
4225 --disable-static in addition to --enable-shared.
4226 EOF
4227     exit 1
4228 fi
4229
4230 disabled optimizations || check_cflags -fomit-frame-pointer
4231
4232 enable_weak_pic() {
4233     disabled pic && return
4234     enable pic
4235     add_cppflags -DPIC
4236     case "$target_os" in
4237     mingw*|cygwin*)
4238         ;;
4239     *)
4240         add_cflags -fPIC
4241         ;;
4242     esac
4243     add_asflags  -fPIC
4244 }
4245
4246 enabled pic && enable_weak_pic
4247
4248 check_cc <<EOF || die "Symbol mangling check failed."
4249 int ff_extern;
4250 EOF
4251 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4252 extern_prefix=${sym%%ff_extern*}
4253
4254 check_inline_asm inline_asm '"" ::'
4255
4256 _restrict=
4257 for restrict_keyword in restrict __restrict__ __restrict; do
4258     check_cc <<EOF && _restrict=$restrict_keyword && break
4259 void foo(char * $restrict_keyword p);
4260 EOF
4261 done
4262
4263 check_cc <<EOF && enable pragma_deprecated
4264 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4265 EOF
4266
4267 check_cc <<EOF && enable attribute_packed
4268 struct { int x; } __attribute__((packed)) x;
4269 EOF
4270
4271 check_cc <<EOF && enable attribute_may_alias
4272 union { int x; } __attribute__((may_alias)) x;
4273 EOF
4274
4275 check_cc <<EOF || die "endian test failed"
4276 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4277 EOF
4278 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4279
4280 check_gas() {
4281     log "check_gas using '$as' as AS"
4282     # :vararg is used on aarch64, arm and ppc altivec
4283     check_as <<EOF || return 1
4284 .macro m n, y:vararg=0
4285 \n: .int \y
4286 .endm
4287 m x
4288 EOF
4289     # .altmacro is only used in arm asm
4290     ! enabled arm || check_as <<EOF || return 1
4291 .altmacro
4292 EOF
4293     enable gnu_as
4294     return 0
4295 }
4296
4297 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4298     nogas=:
4299     enabled_any arm aarch64 && nogas=die
4300     enabled_all ppc altivec && nogas=warn
4301     as_noop=-v
4302
4303     case $as_type in
4304         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4305         gcc)  gaspp_as_type=gas ;;
4306         *)    gaspp_as_type=$as_type ;;
4307     esac
4308
4309     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4310
4311     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4312         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4313
4314     if ! check_gas ; then
4315         as=${gas:=$as}
4316         check_gas || \
4317             $nogas "GNU assembler not found, install/update gas-preprocessor"
4318     fi
4319
4320     check_as <<EOF && enable as_func
4321 .func test
4322 .endfunc
4323 EOF
4324 fi
4325
4326 check_inline_asm inline_asm_labels '"1:\n"'
4327
4328 if enabled aarch64; then
4329     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4330     # internal assembler in clang 3.3 does not support this instruction
4331     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4332     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4333
4334     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4335
4336 elif enabled alpha; then
4337
4338     check_cflags -mieee
4339
4340 elif enabled arm; then
4341
4342     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4343     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4344     enabled thumb && check_cflags -mthumb || check_cflags -marm
4345
4346     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4347         enable vfp_args
4348     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4349         enable vfp_args
4350     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4351         case "${cross_prefix:-$cc}" in
4352             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4353             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4354 __asm__ (".eabi_attribute 28, 1");
4355 int main(void) { return 0; }
4356 EOF
4357         esac
4358         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4359     fi
4360
4361     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4362     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4363     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4364     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4365     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4366     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4367
4368     [ $target_os = linux ] || [ $target_os = android ] ||
4369         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4370             $ARCH_EXT_LIST_ARM
4371
4372     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4373
4374     check_as <<EOF && enable as_dn_directive
4375 ra .dn d0.i16
4376 .unreq ra
4377 EOF
4378     check_as <<EOF && enable as_fpu_directive
4379 .fpu neon
4380 EOF
4381
4382     # llvm's integrated assembler supports .object_arch from llvm 3.5
4383     [ "$objformat" = elf32 ] || [ "$objformat" = elf64 ] &&
4384         check_as <<EOF && enable as_object_arch
4385 .object_arch armv4
4386 EOF
4387
4388     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4389
4390 elif enabled mips; then
4391
4392     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4393
4394     # make sure that only an instruction set is enabled
4395     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4396
4397     if enabled mips64; then
4398         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4399             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4400                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4401     else
4402         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4403             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4404                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4405     fi
4406
4407 elif enabled parisc; then
4408
4409     if enabled gcc; then
4410         case $($cc -dumpversion) in
4411             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4412         esac
4413     fi
4414
4415 elif enabled ppc; then
4416
4417     enable local_aligned_8 local_aligned_16 local_aligned_32
4418
4419     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4420     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4421     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4422     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4423
4424     # AltiVec flags: The FSF version of GCC differs from the Apple version
4425     if enabled altivec; then
4426         check_cflags -maltivec -mabi=altivec &&
4427         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4428         check_cflags -faltivec
4429
4430         # check if our compiler supports Motorola AltiVec C API
4431         check_cc <<EOF || disable altivec
4432 $inc_altivec_h
4433 int main(void) {
4434     vector signed int v1 = (vector signed int) { 0 };
4435     vector signed int v2 = (vector signed int) { 1 };
4436     v1 = vec_add(v1, v2);
4437     return 0;
4438 }
4439 EOF
4440
4441         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4442     fi
4443
4444     if enabled vsx; then
4445         check_cflags -mvsx &&
4446         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4447     fi
4448
4449     if enabled power8; then
4450         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4451     fi
4452
4453 elif enabled x86; then
4454
4455     check_builtin rdtsc    intrin.h   "__rdtsc()"
4456     check_builtin mm_empty mmintrin.h "_mm_empty()"
4457
4458     enable local_aligned_8 local_aligned_16 local_aligned_32
4459
4460     # check whether EBP is available on x86
4461     # As 'i' is stored on the stack, this program will crash
4462     # if the base pointer is used to access it because the
4463     # base pointer is cleared in the inline assembly code.
4464     check_exec_crash <<EOF && enable ebp_available
4465 volatile int i=0;
4466 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4467 return i;
4468 EOF
4469
4470     # check whether EBX is available on x86
4471     check_inline_asm ebx_available '""::"b"(0)' &&
4472         check_inline_asm ebx_available '"":::"%ebx"'
4473
4474     # check whether xmm clobbers are supported
4475     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4476
4477     # check whether binutils is new enough to compile SSSE3/MMXEXT
4478     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4479     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4480
4481     probe_x86asm(){
4482         x86asmexe_probe=$1
4483         if check_cmd $x86asmexe_probe -v; then
4484             x86asmexe=$x86asmexe_probe
4485             x86asm_type=nasm
4486             x86asm_debug="-g -F dwarf"
4487             X86ASM_DEPFLAGS='-MD $(@:.o=.d)'
4488         elif check_cmd $x86asmexe_probe --version; then
4489             x86asmexe=$x86asmexe_probe
4490             x86asm_type=yasm
4491             x86asm_debug="-g dwarf2"
4492             X86ASMDEP='$(DEPX86ASM) $(X86ASMFLAGS) -M $(X86ASM_O) $< > $(@:.o=.d)'
4493         fi
4494     }
4495
4496     if ! disabled_any asm mmx x86asm; then
4497         for program in $x86asmexe nasm yasm; do
4498             probe_x86asm $program
4499             test -n "$x86asm_type" && break
4500         done
4501         X86ASMFLAGS="-f $objformat"
4502         enabled pic               && append X86ASMFLAGS "-DPIC"
4503         test -n "$extern_prefix"  && append X86ASMFLAGS "-DPREFIX"
4504         case "$objformat" in
4505             elf*) enabled debug && append X86ASMFLAGS $x86asm_debug ;;
4506         esac
4507
4508         check_x86asm "movbe ecx, [5]" && enable x86asm ||
4509             die "nasm/yasm not found or too old. Use --disable-x86asm for a crippled build."
4510         check_x86asm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4511         check_x86asm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4512         check_x86asm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4513         check_x86asm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4514         check_x86asm "CPU amdnop"                      || disable cpunop
4515     fi
4516
4517     case "$cpu" in
4518         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4519             disable fast_clz
4520         ;;
4521     esac
4522
4523 fi
4524
4525 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4526
4527 check_ldflags -Wl,--as-needed
4528
4529 if ! disabled network; then
4530     check_func getaddrinfo $network_extralibs
4531     check_func inet_aton $network_extralibs
4532
4533     check_type netdb.h "struct addrinfo"
4534     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4535     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4536     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4537     check_type poll.h "struct pollfd"
4538     check_type netinet/sctp.h "struct sctp_event_subscribe"
4539     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4540     check_type netinet/in.h "struct sockaddr_in6"
4541     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4542     check_type "sys/types.h sys/socket.h" socklen_t
4543
4544     # Prefer arpa/inet.h over winsock2
4545     if check_header arpa/inet.h ; then
4546         check_func closesocket
4547     elif check_header winsock2.h ; then
4548         check_func_headers winsock2.h closesocket -lws2 &&
4549             network_extralibs="-lws2" ||
4550         { check_func_headers winsock2.h closesocket -lws2_32 &&
4551             network_extralibs="-lws2_32"; } || disable winsock2_h network
4552         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4553
4554         check_type ws2tcpip.h socklen_t
4555         check_type ws2tcpip.h "struct addrinfo"
4556         check_type ws2tcpip.h "struct group_source_req"
4557         check_type ws2tcpip.h "struct ip_mreq_source"
4558         check_type ws2tcpip.h "struct ipv6_mreq"
4559         check_type winsock2.h "struct pollfd"
4560         check_struct winsock2.h "struct sockaddr" sa_len
4561         check_type ws2tcpip.h "struct sockaddr_in6"
4562         check_type ws2tcpip.h "struct sockaddr_storage"
4563     else
4564         disable network
4565     fi
4566 fi
4567
4568 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4569 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4570 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4571 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4572
4573 case "$custom_allocator" in
4574     jemalloc)
4575         # jemalloc by default does not use a prefix
4576         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4577     ;;
4578     tcmalloc)
4579         require_pkg_config libtcmalloc libtcmalloc gperftools/tcmalloc.h tc_malloc
4580         malloc_prefix=tc_
4581     ;;
4582 esac
4583
4584 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4585 check_func  ${malloc_prefix}memalign            && enable memalign
4586 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4587
4588 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4589     { check_lib clock_gettime time.h clock_gettime ||
4590       check_lib clock_gettime time.h clock_gettime -lrt; }
4591
4592 check_func  fcntl
4593 check_func  fork
4594 check_func  gethrtime
4595 check_func  getopt
4596 check_func  getrusage
4597 check_func  gettimeofday
4598 check_func  gmtime_r
4599 check_func  isatty
4600 check_func  localtime_r
4601 check_func  mach_absolute_time
4602 check_func  mkstemp
4603 check_func  mmap
4604 check_func  mprotect
4605 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4606 check_func_headers time.h nanosleep || check_lib nanosleep time.h nanosleep -lrt
4607 check_func  sched_getaffinity
4608 check_func  setrlimit
4609 check_func  strerror_r
4610 check_func  sysconf
4611 check_func  sysctl
4612 check_func  usleep
4613
4614 check_func_headers io.h setmode
4615 check_func_headers stdlib.h getenv
4616
4617 check_func_headers windows.h GetProcessAffinityMask
4618 check_func_headers windows.h GetProcessTimes
4619 check_func_headers windows.h GetSystemTimeAsFileTime
4620 check_func_headers windows.h LoadLibrary
4621 check_func_headers windows.h MapViewOfFile
4622 check_func_headers windows.h SetConsoleTextAttribute
4623 check_func_headers windows.h Sleep
4624 check_func_headers windows.h VirtualAlloc
4625 check_struct windows.h "CONDITION_VARIABLE" Ptr
4626
4627 check_header d3d11.h
4628 check_header direct.h
4629 check_header dlfcn.h
4630 check_header dxva.h
4631 check_header dxva2api.h
4632 check_header io.h
4633 check_header mach/mach_time.h
4634 check_header malloc.h
4635 check_header poll.h
4636 check_header sys/mman.h
4637 check_header sys/param.h
4638 check_header sys/resource.h
4639 check_header sys/select.h
4640 check_header sys/time.h
4641 check_header sys/un.h
4642 check_header unistd.h
4643 check_header valgrind/valgrind.h
4644 check_header VideoDecodeAcceleration/VDADecoder.h
4645 check_header windows.h
4646 check_header X11/extensions/XvMClib.h
4647
4648 # it seems there are versions of clang in some distros that try to use the
4649 # gcc headers, which explodes for stdatomic
4650 # so we also check that atomics actually work here
4651 check_builtin stdatomic_h stdatomic.h "atomic_int foo; atomic_store(&foo, 0)"
4652
4653 check_lib shell32  "windows.h shellapi.h" CommandLineToArgvW   -lshell32
4654 check_lib wincrypt "windows.h wincrypt.h" CryptGenRandom       -ladvapi32
4655 check_lib psapi    "windows.h psapi.h"    GetProcessMemoryInfo -lpsapi
4656
4657 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4658
4659 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4660 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4661 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4662
4663 check_type "va/va.h va/va_dec_hevc.h" "VAPictureParameterBufferHEVC"
4664 check_type "va/va.h va/va_dec_vp8.h" "VAPictureParameterBufferVP8"
4665 check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
4666 check_type "va/va.h va/va_enc_h264.h" "VAEncPictureParameterBufferH264"
4667 check_type "va/va.h va/va_enc_hevc.h" "VAEncPictureParameterBufferHEVC"
4668 check_type "va/va.h va/va_enc_jpeg.h" "VAEncPictureParameterBufferJPEG"
4669 check_type "va/va.h va/va_enc_mpeg2.h" "VAEncPictureParameterBufferMPEG2"
4670 check_type "va/va.h va/va_enc_vp8.h"  "VAEncPictureParameterBufferVP8"
4671
4672 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4673
4674 if ! disabled w32threads && ! enabled pthreads; then
4675     check_lib w32threads "windows.h process.h" _beginthreadex
4676 fi
4677
4678 # check for some common methods of building with pthread support
4679 # do this before the optional library checks as some of them require pthreads
4680 if ! disabled pthreads && ! enabled w32threads; then
4681     if check_lib pthreads pthread.h pthread_join -pthread; then
4682         add_cflags -pthread
4683     elif check_lib pthreads pthread.h pthread_join -pthreads; then
4684         add_cflags -pthreads
4685     elif check_lib pthreads pthread.h pthread_join -lpthreadGC2; then
4686         :
4687     elif check_lib pthreads pthread.h pthread_join -lpthread; then
4688         :
4689     elif check_func pthread_join; then
4690         enable pthreads
4691     fi
4692 fi
4693
4694 enabled pthreads &&
4695     check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwait(s,0); sem_destroy(s)"
4696
4697 disabled  zlib || check_lib  zlib  zlib.h      zlibVersion -lz
4698 disabled bzlib || check_lib bzlib bzlib.h BZ2_bzlibVersion -lbz2
4699
4700 # On some systems dynamic loading requires no extra linker flags
4701 check_lib libdl dlfcn.h dlopen || check_lib libdl dlfcn.h dlopen -ldl
4702
4703 check_lib libm math.h sin -lm
4704
4705 atan2f_args=2
4706 ldexpf_args=2
4707 powf_args=2
4708
4709 for func in $MATH_FUNCS; do
4710     eval check_mathfunc $func \${${func}_args:-1} $libm_extralibs
4711 done
4712
4713 # these are off by default, so fail if requested and not available
4714 enabled avisynth          && require_header avisynth/avisynth_c.h
4715 enabled avxsynth          && require_header avxsynth/avxsynth_c.h
4716 enabled cuda              && require cuda cuda.h cuInit -lcuda
4717 enabled frei0r            && require_header frei0r.h
4718 enabled gnutls            && require_pkg_config gnutls gnutls gnutls/gnutls.h gnutls_global_init
4719 enabled libbs2b           && require_pkg_config libbs2b libbs2b bs2b.h bs2b_open
4720 enabled libdc1394         && require_pkg_config libdc1394 libdc1394-2 dc1394/dc1394.h dc1394_new
4721 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4722 enabled libfaac           && require libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4723 enabled libfdk_aac        && require_pkg_config libfdk_aac fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4724 enabled libfontconfig     && require_pkg_config libfontconfig fontconfig "fontconfig/fontconfig.h" FcInit
4725 enabled libfreetype       && require_pkg_config libfreetype freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4726 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4727                                    check_lib libgsm "${gsm_hdr}" gsm_create -lgsm && break;
4728                                done || die "ERROR: libgsm not found"; }
4729 enabled libhdcd           && require_pkg_config libhdcd libhdcd "hdcd/hdcd_simple.h" hdcd_new
4730 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4731 enabled libkvazaar        && require_pkg_config libkvazaar "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4732 enabled libmfx            && require_pkg_config libmfx libmfx "mfx/mfxvideo.h" MFXInit
4733 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4734 enabled libnpp            && require libnpp npp.h nppGetLibVersion -lnppi -lnppc
4735 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4736 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4737 enabled libopencv         && require_pkg_config libopencv opencv opencv/cv.h cvCreateImageHeader
4738 enabled libopenh264       && require_pkg_config libopenh264 openh264 wels/codec_api.h WelsGetCodecVersion
4739 enabled libopenjpeg       && { check_lib libopenjpeg openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC ||
4740                                require_pkg_config libopenjpeg libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; }
4741 enabled libopus           && require_pkg_config libopus opus opus_multistream.h opus_multistream_decoder_create
4742 enabled libpulse          && require_pkg_config libpulse libpulse-simple pulse/simple.h pa_simple_new
4743 enabled librtmp           && require_pkg_config librtmp librtmp librtmp/rtmp.h RTMP_Socket
4744 enabled libschroedinger   && require_pkg_config libschroedinger schroedinger-1.0 schroedinger/schro.h schro_init
4745 enabled libsnappy         && require libsnappy snappy-c.h snappy_compress -lsnappy
4746 enabled libspeex          && require_pkg_config libspeex speex speex/speex.h speex_decoder_init -lspeex
4747 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4748 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4749 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4750 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4751 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4752 enabled libvpx            && require_pkg_config libvpx "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version &&
4753                              { enabled libvpx_vp8_decoder &&
4754                                    check_pkg_config libvpx_vp8_decoder vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx
4755                                enabled libvpx_vp8_encoder &&
4756                                    check_pkg_config libvpx_vp8_encoder vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx
4757                                enabled libvpx_vp9_decoder &&
4758                                    check_pkg_config libvpx_vp9_decoder vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx
4759                                enabled libvpx_vp9_encoder &&
4760                                    check_pkg_config libvpx_vp9_encoder vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx
4761                                disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder &&
4762                                    die "libvpx enabled but no supported decoders/encoders found"
4763                              }
4764 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4765 enabled libwebp           && require_pkg_config libwebp libwebp webp/encode.h WebPGetEncoderVersion
4766 enabled libx264           && require_pkg_config libx264 x264 "stdint.h x264.h" x264_encoder_encode &&
4767                              require_cpp_condition x264.h "X264_BUILD >= 118" &&
4768                              { check_cpp_condition x264.h "X264_MPEG2" &&
4769                                enable libx262; }
4770 enabled libx265           && require_pkg_config libx265 x265 x265.h x265_api_get &&
4771                              require_cpp_condition x265.h "X265_BUILD >= 57"
4772 enabled libxavs           && require libxavs "stdint.h xavs.h" xavs_encoder_encode -lxavs
4773 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4774 enabled mmal              && { check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4775                                { ! enabled cross_compile &&
4776                                  add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline &&
4777                                  add_ldflags -L/opt/vc/lib/ &&
4778                                  check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host; } ||
4779                                die "ERROR: mmal not found" &&
4780                                check_func_headers interface/mmal/mmal.h "MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS"; }
4781 enabled omx               && require_header OMX_Core.h
4782 enabled omx_rpi           && { check_header OMX_Core.h ||
4783                                { ! enabled cross_compile && add_cflags -isystem/opt/vc/include/IL && check_header OMX_Core.h ; } ||
4784                                die "ERROR: OpenMAX IL headers not found"; } && enable omx
4785 enabled openssl           && { { check_pkg_config openssl openssl openssl/ssl.h OPENSSL_init_ssl ||
4786                                  check_pkg_config openssl openssl openssl/ssl.h SSL_library_init; } ||
4787                                check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4788                                check_lib openssl openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4789                                check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4790                                die "ERROR: openssl not found"; }
4791
4792 enabled gnutls            && check_lib gmp gmp.h mpz_export -lgmp
4793
4794 if enabled nvenc; then
4795     require_header nvEncodeAPI.h
4796     require_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 6"
4797 fi
4798
4799 # SDL is "special" and adds some CFLAGS that should not pollute anything else.
4800 if enabled avplay; then
4801     CFLAGS_SAVE=$CFLAGS
4802     check_pkg_config sdl "sdl >= 1.2.1 sdl < 1.3.0" SDL_events.h SDL_PollEvent &&
4803     sdl_cflags=$pkg_cflags
4804     CFLAGS=$CFLAGS_SAVE
4805 fi
4806
4807 ! disabled pod2man   && check_cmd pod2man --help     && enable pod2man   || disable pod2man
4808 ! disabled texi2html && check_cmd texi2html -version && enable texi2html || disable texi2html
4809
4810 check_header linux/fb.h
4811 check_header linux/videodev2.h
4812 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4813
4814 check_header AVFoundation/AVFoundation.h
4815
4816 check_header sys/videoio.h
4817
4818 check_lib user32 "windows.h winuser.h" GetShellWindow -luser32
4819 check_lib vfw32 "windows.h vfw.h" capCreateCaptureWindow -lvfw32
4820 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4821 # w32api 3.12 had it defined wrong
4822 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4823
4824 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4825 { check_header dev/bktr/ioctl_meteor.h &&
4826   check_header dev/bktr/ioctl_bt848.h; } ||
4827 { check_header machine/ioctl_meteor.h &&
4828   check_header machine/ioctl_bt848.h; } ||
4829 { check_header dev/video/meteor/ioctl_meteor.h &&
4830   check_header dev/video/bktr/ioctl_bt848.h; } ||
4831 check_header dev/ic/bt8xx.h
4832