90fb6f07ca72f917ddee1809b4473eff7a905743
[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:$PATH
58
59 show_help(){
60     cat <<EOF
61 Usage: configure [options]
62 Options: [defaults in brackets after descriptions]
63
64 Help options:
65   --help                   print this message
66   --quiet                  Suppress showing informative output
67   --list-decoders          show all available decoders
68   --list-encoders          show all available encoders
69   --list-hwaccels          show all available hardware accelerators
70   --list-demuxers          show all available demuxers
71   --list-muxers            show all available muxers
72   --list-parsers           show all available parsers
73   --list-protocols         show all available protocols
74   --list-bsfs              show all available bitstream filters
75   --list-indevs            show all available input devices
76   --list-filters           show all available filters
77
78 Standard options:
79   --logfile=FILE           log tests and output to FILE [avbuild/config.log]
80   --disable-logging        do not log configure debug information
81   --prefix=PREFIX          install in PREFIX [$prefix_default]
82   --bindir=DIR             install binaries in DIR [PREFIX/bin]
83   --datadir=DIR            install data files in DIR [PREFIX/share/avconv]
84   --docdir=DIR             install documentation in DIR [PREFIX/share/doc/libav]
85   --libdir=DIR             install libs in DIR [PREFIX/lib]
86   --shlibdir=DIR           install shared libs in DIR [PREFIX/lib]
87   --incdir=DIR             install includes in DIR [PREFIX/include]
88   --mandir=DIR             install man page in DIR [PREFIX/share/man]
89   --enable-rpath           use rpath when linking programs (USE WITH CARE)
90
91 Licensing options:
92   --enable-gpl             allow use of GPL code, the resulting libs
93                            and binaries will be under GPL [no]
94   --enable-version3        upgrade (L)GPL to version 3 [no]
95   --enable-nonfree         allow use of nonfree code, the resulting libs
96                            and binaries will be unredistributable [no]
97
98 Configuration options:
99   --disable-static         do not build static libraries [no]
100   --enable-shared          build shared libraries [no]
101   --enable-small           optimize for size instead of speed
102   --enable-runtime-cpudetect detect CPU capabilities at runtime (bigger binary)
103   --enable-gray            enable full grayscale support (slower color)
104   --disable-swscale-alpha  disable alpha channel support in swscale
105   --disable-all            disable building components, libraries and programs
106
107 Program options:
108   --disable-programs       do not build command line programs
109   --disable-avconv         disable avconv build
110   --disable-avplay         disable avplay build
111   --disable-avprobe        disable avprobe build
112
113 Component options:
114   --disable-doc            do not build documentation
115   --disable-pod2man        do not build manual pages
116   --disable-texi2html      do not build HTML documentation
117   --disable-avdevice       disable libavdevice build
118   --disable-avcodec        disable libavcodec build
119   --disable-avformat       disable libavformat build
120   --disable-avutil         disable libavutil build
121   --disable-swscale        disable libswscale build
122   --disable-avfilter       disable video filter support [no]
123   --disable-avresample     disable libavresample build [no]
124   --disable-pthreads       disable pthreads [auto]
125   --disable-w32threads     disable Win32 threads [auto]
126   --disable-network        disable network support [no]
127   --disable-dct            disable DCT code
128   --disable-error-resilience disable error resilience code
129   --disable-lsp            disable LSP code
130   --disable-lzo            disable LZO decoder code
131   --disable-mdct           disable MDCT code
132   --disable-rdft           disable RDFT code
133   --disable-fft            disable FFT code
134   --disable-faan           disable floating point AAN (I)DCT code
135
136 Individual component options:
137   --disable-everything     disable all components listed below
138   --disable-encoder=NAME   disable encoder NAME
139   --enable-encoder=NAME    enable encoder NAME
140   --disable-encoders       disable all encoders
141   --disable-decoder=NAME   disable decoder NAME
142   --enable-decoder=NAME    enable decoder NAME
143   --disable-decoders       disable all decoders
144   --disable-hwaccel=NAME   disable hwaccel NAME
145   --enable-hwaccel=NAME    enable hwaccel NAME
146   --disable-hwaccels       disable all hwaccels
147   --disable-muxer=NAME     disable muxer NAME
148   --enable-muxer=NAME      enable muxer NAME
149   --disable-muxers         disable all muxers
150   --disable-demuxer=NAME   disable demuxer NAME
151   --enable-demuxer=NAME    enable demuxer NAME
152   --disable-demuxers       disable all demuxers
153   --enable-parser=NAME     enable parser NAME
154   --disable-parser=NAME    disable parser NAME
155   --disable-parsers        disable all parsers
156   --enable-bsf=NAME        enable bitstream filter NAME
157   --disable-bsf=NAME       disable bitstream filter NAME
158   --disable-bsfs           disable all bitstream filters
159   --enable-protocol=NAME   enable protocol NAME
160   --disable-protocol=NAME  disable protocol NAME
161   --disable-protocols      disable all protocols
162   --enable-indev=NAME      enable input device NAME
163   --disable-indev=NAME     disable input device NAME
164   --disable-indevs         disable input devices
165   --disable-devices        disable all devices
166   --enable-filter=NAME     enable filter NAME
167   --disable-filter=NAME    disable filter NAME
168   --disable-filters        disable all filters
169
170 External library support:
171
172   Using any of the following switches will allow Libav to link to the
173   corresponding external library. All the components depending on that library
174   will become enabled, if all their other dependencies are met and they are not
175   explicitly disabled. E.g. --enable-libwavpack will enable linking to
176   libwavpack and allow the libwavpack encoder to be built, unless it is
177   specifically disabled with --disable-encoder=libwavpack.
178
179   Note that only the system libraries are auto-detected. All the other external
180   libraries must be explicitly enabled.
181
182   Also note that the following help text describes the purpose of the libraries
183   themselves, not all their features will necessarily be usable by Libav.
184
185   --enable-avisynth          video frameserver
186   --enable-avxsynth          Linux version of AviSynth
187   --enable-bzlib             bzip2 compression [autodetect]
188   --enable-frei0r            video filtering plugins
189   --enable-gnutls            crypto
190   --enable-libaom            AV1 video encoding/decoding
191   --enable-libbs2b           Bauer stereophonic-to-binaural DSP
192   --enable-libcdio           audio CD input
193   --enable-libdc1394         IEEE 1394/Firewire camera input
194   --enable-libdcadec         DCA audio decoding
195   --enable-libfaac           AAC audio encoding
196   --enable-libfdk-aac        AAC audio encoding/decoding
197   --enable-libfontconfig     font configuration and management
198   --enable-libfreetype       font rendering
199   --enable-libgsm            GSM audio encoding/decoding
200   --enable-libhdcd           HDCD decoding filter
201   --enable-libilbc           ILBC audio encoding/decoding
202   --enable-libjack           JACK audio sound server
203   --enable-libkvazaar        HEVC video encoding
204   --enable-libmp3lame        MP3 audio encoding
205   --enable-libopencore-amrnb AMR-NB audio encoding/decoding
206   --enable-libopencore-amrwb AMR-WB audio decoding
207   --enable-libopencv         computer vision
208   --enable-libopenh264       H.264 video encoding/decoding
209   --enable-libopenjpeg       JPEG 2000 image encoding/decoding
210   --enable-libopus           Opus audio encoding/decoding
211   --enable-libpulse          Pulseaudio sound server
212   --enable-librtmp           RTMP streaming
213   --enable-libschroedinger   Dirac video encoding/decoding
214   --enable-libsnappy         snappy compression
215   --enable-libspeex          Speex audio encoding/decoding
216   --enable-libtheora         Theora video encoding/decoding
217   --enable-libtwolame        MP2 audio encoding
218   --enable-libvo-aacenc      AAC audio encoding
219   --enable-libvo-amrwbenc    AMR-WB audio encoding
220   --enable-libvorbis         Vorbis audio encoding/decoding
221   --enable-libvpx            VP* video encoding/decoding
222   --enable-libwavpack        Wavpack audio encoding/decoding
223   --enable-libwebp           WebP image encoding/decoding
224   --enable-libx264           H.264 video encoding
225   --enable-libx265           HEVC video encoding
226   --enable-libxavs           Chinese AVS video encoding
227   --enable-libxcb            X window system protocol communication
228   --enable-libxcb-shm        X11 shm communication [auto]
229   --enable-libxcb-xfixes     X11 mouse rendering [auto]
230   --enable-libxvid           MPEG-4 ASP video encoding
231   --enable-openssl           crypto
232   --enable-zlib              compression [autodetect]
233
234   The following libraries provide various hardware acceleration features:
235   --enable-amf     AMF video encoding code [auto]
236   --enable-cuda    Nvidia CUDA (dynamically linked)
237   --enable-cuvid   Nvidia CUVID video decode acceleration
238   --enable-d3d11va Microsoft Direct3D 11 video acceleration [auto]
239   --enable-dxva2   Microsoft DirectX 9 video acceleration [auto]
240   --enable-libmfx  Intel MediaSDK (AKA Quick Sync Video)
241   --enable-libnpp  Nvidia CUDA processing
242   --enable-mmal    Broadcom Multi-Media Abstraction Layer (Raspberry Pi)
243   --enable-nvenc   Nvidia video encoding
244   --enable-omx     OpenMAX IL
245   --enable-omx-rpi OpenMAX IL for Raspberry Pi
246   --enable-vaapi   Video Acceleration API (mainly Unix/Intel)
247   --enable-vda     Apple Video Decode Acceleration [auto]
248   --enable-vdpau   Nvidia Video Decode and Presentation API for Unix [auto]
249
250 Toolchain options:
251   --arch=ARCH              select architecture [$arch]
252   --cpu=CPU                select the minimum required CPU (affects
253                            instruction selection, may crash on older CPUs)
254   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
255   --enable-cross-compile   assume a cross-compiler is used
256   --sysroot=PATH           root of cross-build tree
257   --sysinclude=PATH        location of cross-build system headers
258   --target-os=OS           compiler targets OS [$target_os]
259   --target-exec=CMD        command to run executables on target
260   --target-path=DIR        path to view of build directory on target
261   --target-samples=DIR     path to samples directory on target
262   --toolchain=NAME         set tool defaults according to NAME
263                            (gcc-asan, clang-asan, gcc-msan, clang-msan,
264                            gcc-tsan, clang-tsan, gcc-usan, clang-usan,
265                            valgrind-massif, valgrind-memcheck,
266                            msvc, icl, gcov, llvm-cov, hardened)
267   --nm=NM                  use nm tool
268   --ar=AR                  use archive tool AR [$ar_default]
269   --as=AS                  use assembler AS [$as_default]
270   --cc=CC                  use C compiler CC [$cc_default]
271   --objcc=OCC              use ObjC compiler OCC [$cc_default]
272   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
273   --ld=LD                  use linker LD
274   --x86asmexe=X86ASM       use x86 assembler X86ASM
275   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
276   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
277   --host-cc=HOSTCC         use host C compiler HOSTCC
278   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
279   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
280   --host-ld=HOSTLD         use host linker HOSTLD
281   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
282   --host-libs=HLIBS        use libs HLIBS when linking for host
283   --host-os=OS             compiler host OS [$target_os]
284   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
285   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
286   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
287   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
288   --extra-ldsoflags=ELDFLAGS add ELDFLAGS to LDSOFLAGS [$LDSOFLAGS]
289   --extra-libs=ELIBS       add ELIBS [$ELIBS]
290   --extra-version=STRING   version string suffix []
291   --optflags=OPTFLAGS      override optimization-related compiler flags
292   --enable-pic             build position-independent code
293   --enable-thumb           compile for Thumb instruction set
294   --enable-lto             use link-time optimization
295   --env="ENV=override"     override the environment variables
296
297 Advanced options (experts only):
298   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
299   --custom-allocator=NAME  use a supported custom allocator
300   --disable-symver         disable symbol versioning
301   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
302   --disable-safe-bitstream-reader
303                            disable buffer boundary checking in bitreaders
304                            (faster, but may crash)
305   --enable-sram            allow use of on-chip SRAM
306
307 Optimization options (experts only):
308   --disable-asm            disable all assembly optimizations
309   --disable-altivec        disable AltiVec optimizations
310   --disable-vsx            disable VSX optimizations
311   --disable-power8         disable POWER8 optimizations
312   --disable-amd3dnow       disable 3DNow! optimizations
313   --disable-amd3dnowext    disable 3DNow! extended optimizations
314   --disable-mmx            disable MMX optimizations
315   --disable-mmxext         disable MMXEXT optimizations
316   --disable-sse            disable SSE optimizations
317   --disable-sse2           disable SSE2 optimizations
318   --disable-sse3           disable SSE3 optimizations
319   --disable-ssse3          disable SSSE3 optimizations
320   --disable-sse4           disable SSE4 optimizations
321   --disable-sse42          disable SSE4.2 optimizations
322   --disable-avx            disable AVX optimizations
323   --disable-xop            disable XOP optimizations
324   --disable-fma3           disable FMA3 optimizations
325   --disable-fma4           disable FMA4 optimizations
326   --disable-avx2           disable AVX2 optimizations
327   --disable-armv5te        disable armv5te optimizations
328   --disable-armv6          disable armv6 optimizations
329   --disable-armv6t2        disable armv6t2 optimizations
330   --disable-vfp            disable VFP optimizations
331   --disable-neon           disable NEON optimizations
332   --disable-inline-asm     disable use of inline assembly
333   --disable-x86asm         disable use of standalone x86 assembly
334
335 Developer options (useful when working on Libav itself):
336   --disable-debug          disable debugging symbols
337   --enable-debug=LEVEL     set the debug level [$debuglevel]
338   --disable-optimizations  disable compiler optimizations
339   --enable-extra-warnings  enable more compiler warnings
340   --samples=PATH           location of test samples for FATE, if not set use
341                            \$LIBAV_SAMPLES at make invocation time.
342   --enable-neon-clobber-test check NEON registers for clobbering (should be
343                            used only for debugging purposes)
344   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
345                            should be used only for debugging purposes)
346   --disable-valgrind-backtrace do not print a backtrace under Valgrind
347                            (only applies to --disable-optimizations builds)
348   --ignore-tests=TESTS     comma-separated list (without "fate-" prefix
349                            in the name) of tests whose result is ignored
350
351 NOTE: Object files are built at the place where configure is launched.
352 EOF
353   exit 0
354 }
355
356 log(){
357     echo "$@" >> $logfile
358 }
359
360 log_file(){
361     log BEGIN $1
362     i=1
363     while read line; do
364         printf '%5s   %s\n' "${i}" "${line}"
365         i=$(($i+1))
366     done < $1 >> $logfile
367     log END $1
368 }
369
370 echolog(){
371     log "$@"
372     echo "$@"
373 }
374
375 warn(){
376     log "WARNING: $*"
377     WARNINGS="${WARNINGS}WARNING: $*\n"
378 }
379
380 die(){
381     echolog "$@"
382     cat <<EOF
383
384 If you think configure made a mistake, make sure you are using the latest
385 version from Git.  If the latest version fails, report the problem to the
386 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
387 EOF
388     if disabled logging; then
389         cat <<EOF
390 Rerun configure with logging enabled (do not use --disable-logging), and
391 include the log this produces with your report.
392 EOF
393     else
394         cat <<EOF
395 Include the log file "$logfile" produced by configure as this will help
396 solving the problem.
397 EOF
398     fi
399     exit 1
400 }
401
402 # Avoid locale weirdness, besides we really just want to translate ASCII.
403 toupper(){
404     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
405 }
406
407 tolower(){
408     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
409 }
410
411 c_escape(){
412     echo "$*" | sed 's/["\\]/\\\0/g'
413 }
414
415 sh_quote(){
416     v=$(echo "$1" | sed "s/'/'\\\\''/g")
417     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
418     echo "$v"
419 }
420
421 cleanws(){
422     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
423 }
424
425 filter(){
426     pat=$1
427     shift
428     for v; do
429         eval "case '$v' in $pat) printf '%s ' '$v' ;; esac"
430     done
431 }
432
433 filter_out(){
434     pat=$1
435     shift
436     for v; do
437         eval "case '$v' in $pat) ;; *) printf '%s ' '$v' ;; esac"
438     done
439 }
440
441 map(){
442     m=$1
443     shift
444     for v; do eval $m; done
445 }
446
447 add_suffix(){
448     suffix=$1
449     shift
450     for v; do echo ${v}${suffix}; done
451 }
452
453 set_all(){
454     value=$1
455     shift
456     for var in $*; do
457         eval $var=$value
458     done
459 }
460
461 set_weak(){
462     value=$1
463     shift
464     for var; do
465         eval : \${$var:=$value}
466     done
467 }
468
469 sanitize_var_name(){
470     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
471 }
472
473 set_sanitized(){
474     var=$1
475     shift
476     eval $(sanitize_var_name "$var")='$*'
477 }
478
479 get_sanitized(){
480     eval echo \$$(sanitize_var_name "$1")
481 }
482
483 pushvar(){
484     for pvar in $*; do
485         eval level=\${${pvar}_level:=0}
486         eval ${pvar}_${level}="\$$pvar"
487         eval ${pvar}_level=$(($level+1))
488     done
489 }
490
491 popvar(){
492     for pvar in $*; do
493         eval level=\${${pvar}_level:-0}
494         test $level = 0 && continue
495         eval level=$(($level-1))
496         eval $pvar="\${${pvar}_${level}}"
497         eval ${pvar}_level=$level
498         eval unset ${pvar}_${level}
499     done
500 }
501
502 enable(){
503     set_all yes $*
504 }
505
506 disable(){
507     set_all no $*
508 }
509
510 enable_weak(){
511     set_weak yes $*
512 }
513
514 disable_weak(){
515     set_weak no $*
516 }
517
518 enable_sanitized(){
519     for var; do
520         enable $(sanitize_var_name $var)
521     done
522 }
523
524 disable_sanitized(){
525     for var; do
526         disable $(sanitize_var_name $var)
527     done
528 }
529
530 do_enable_deep(){
531     for var; do
532         enabled $var && continue
533         eval sel="\$${var}_select"
534         eval sgs="\$${var}_suggest"
535         pushvar var sgs
536         enable_deep $sel
537         popvar sgs
538         enable_deep_weak $sgs
539         popvar var
540     done
541 }
542
543 enable_deep(){
544     do_enable_deep $*
545     enable $*
546 }
547
548 enable_deep_weak(){
549     for var; do
550         disabled $var && continue
551         pushvar var
552         do_enable_deep $var
553         popvar var
554         enable_weak $var
555     done
556 }
557
558 enabled(){
559     test "${1#!}" = "$1" && op="=" || op="!="
560     eval test "x\$${1#!}" $op "xyes"
561 }
562
563 disabled(){
564     test "${1#!}" = "$1" && op="=" || op="!="
565     eval test "x\$${1#!}" $op "xno"
566 }
567
568 enabled_all(){
569     for opt; do
570         enabled $opt || return 1
571     done
572 }
573
574 disabled_all(){
575     for opt; do
576         disabled $opt || return 1
577     done
578 }
579
580 enabled_any(){
581     for opt; do
582         enabled $opt && return 0
583     done
584 }
585
586 disabled_any(){
587     for opt; do
588         disabled $opt && return 0
589     done
590     return 1
591 }
592
593 set_default(){
594     for opt; do
595         eval : \${$opt:=\$${opt}_default}
596     done
597 }
598
599 is_in(){
600     value=$1
601     shift
602     for var in $*; do
603         [ $var = $value ] && return 0
604     done
605     return 1
606 }
607
608 check_deps(){
609     for cfg; do
610         enabled ${cfg}_checking && die "Circular dependency for $cfg."
611         disabled ${cfg}_checking && continue
612         enable ${cfg}_checking
613
614         eval dep_all="\$${cfg}_deps"
615         eval dep_any="\$${cfg}_deps_any"
616         eval dep_con="\$${cfg}_conflict"
617         eval dep_sel="\$${cfg}_select"
618         eval dep_sgs="\$${cfg}_suggest"
619         eval dep_ifa="\$${cfg}_if"
620         eval dep_ifn="\$${cfg}_if_any"
621
622         pushvar cfg dep_all dep_any dep_con dep_sel dep_sgs dep_ifa dep_ifn
623         check_deps $dep_all $dep_any $dep_con $dep_sel $dep_sgs $dep_ifa $dep_ifn
624         popvar cfg dep_all dep_any dep_con dep_sel dep_sgs dep_ifa dep_ifn
625
626         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
627         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
628         enabled_all  $dep_all || disable $cfg
629         enabled_any  $dep_any || disable $cfg
630         disabled_all $dep_con || disable $cfg
631         disabled_any $dep_sel && disable $cfg
632
633         enabled $cfg && enable_deep_weak $dep_sel $dep_sgs
634
635         for dep in $dep_all $dep_any $dep_sel $dep_sgs; do
636             # filter out library deps, these do not belong in extralibs
637             is_in $dep $LIBRARY_LIST && continue
638             enabled $dep && eval append ${cfg}_extralibs ${dep}_extralibs
639         done
640
641         disable ${cfg}_checking
642     done
643 }
644
645 print_config(){
646     pfx=$1
647     files=$2
648     shift 2
649     map 'eval echo "$v \${$v:-no}"' "$@" |
650     awk "BEGIN { split(\"$files\", files) }
651         {
652             c = \"$pfx\" toupper(\$1);
653             v = \$2;
654             sub(/yes/, 1, v);
655             sub(/no/,  0, v);
656             for (f in files) {
657                 file = files[f];
658                 if (file ~ /\\.h\$/) {
659                     printf(\"#define %s %d\\n\", c, v) >>file;
660                 } else if (file ~ /\\.asm\$/) {
661                     printf(\"%%define %s %d\\n\", c, v) >>file;
662                 } else if (file ~ /\\.mak\$/) {
663                     n = -v ? \"\" : \"!\";
664                     printf(\"%s%s=yes\\n\", n, c) >>file;
665                 }
666             }
667         }"
668 }
669
670 print_enabled(){
671     suf=$1
672     shift
673     for v; do
674         enabled $v && printf "%s\n" ${v%$suf}
675     done
676 }
677
678 append(){
679     var=$1
680     shift
681     eval "$var=\"\$$var $*\""
682 }
683
684 prepend(){
685     var=$1
686     shift
687     eval "$var=\"$* \$$var\""
688 }
689
690 unique(){
691     var=$1
692     uniq_list=""
693     for tok in $(eval echo \$$var); do
694         uniq_list="$(filter_out $tok $uniq_list) $tok"
695     done
696     eval "$var=\"${uniq_list}\""
697 }
698
699 resolve(){
700     var=$1
701     tmpvar=
702     for entry in $(eval echo \$$var); do
703         tmpvar="$tmpvar $(eval echo \$${entry})"
704     done
705     eval "$var=\"${tmpvar}\""
706 }
707
708 add_cppflags(){
709     append CPPFLAGS "$@"
710 }
711
712 add_cflags(){
713     append CFLAGS $($cflags_filter "$@")
714 }
715
716 add_cflags_headers(){
717     append CFLAGS_HEADERS $($cflags_filter "$@")
718 }
719
720 add_asflags(){
721     append ASFLAGS $($asflags_filter "$@")
722 }
723
724 add_objcflags(){
725     append OBJCFLAGS $($objcflags_filter "$@")
726 }
727
728 add_ldflags(){
729     append LDFLAGS $($ldflags_filter "$@")
730 }
731
732 add_ldexeflags(){
733     append LDEXEFLAGS $($ldflags_filter "$@")
734 }
735
736 add_ldsoflags(){
737     append LDSOFLAGS $($ldflags_filter "$@")
738 }
739
740 add_stripflags(){
741     append STRIPFLAGS "$@"
742 }
743
744 add_extralibs(){
745     prepend extralibs $($ldflags_filter "$@")
746 }
747
748 add_host_cppflags(){
749     append host_cppflags "$@"
750 }
751
752 add_host_cflags(){
753     append host_cflags $($host_cflags_filter "$@")
754 }
755
756 add_host_ldflags(){
757     append host_ldflags $($host_ldflags_filter "$@")
758 }
759
760 add_compat(){
761     append compat_objs $1
762     shift
763     map 'add_cppflags -D$v' "$@"
764 }
765
766 test_cmd(){
767     log "$@"
768     "$@" >> $logfile 2>&1
769 }
770
771 cc_o(){
772     eval printf '%s\\n' $CC_O
773 }
774
775 cc_e(){
776     eval printf '%s\\n' $CC_E
777 }
778
779 test_cc(){
780     log test_cc "$@"
781     cat > $TMPC
782     log_file $TMPC
783     test_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
784 }
785
786 test_objcc(){
787     log test_objcc "$@"
788     cat > $TMPC
789     log_file $TMPC
790     test_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
791 }
792
793 test_cpp(){
794     log test_cpp "$@"
795     cat > $TMPC
796     log_file $TMPC
797     test_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
798 }
799
800 as_o(){
801     eval printf '%s\\n' $AS_O
802 }
803
804 test_as(){
805     log test_as "$@"
806     cat > $TMPS
807     log_file $TMPS
808     test_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
809 }
810
811 x86asm_o(){
812     eval printf '%s\\n' $X86ASM_O
813 }
814
815 test_x86asm(){
816     log test_x86asm "$@"
817     echo "$1" > $TMPASM
818     log_file $TMPASM
819     shift
820     test_cmd $x86asmexe $X86ASMFLAGS "$@" $(x86asm_o $TMPO) $TMPASM
821 }
822
823 check_cmd(){
824     log check_cmd "$@"
825     cmd=$1
826     disabled $cmd && return
827     disable $cmd
828     test_cmd $@ && enable $cmd
829 }
830
831 check_as(){
832     log check_as "$@"
833     name=$1
834     code=$2
835     shift 2
836     disable $name
837     test_as $@ <<EOF && enable $name
838 $code
839 EOF
840 }
841
842 check_inline_asm(){
843     log check_inline_asm "$@"
844     name="$1"
845     code="$2"
846     shift 2
847     disable $name
848     test_cc "$@" <<EOF && enable $name
849 void foo(void){ __asm__ volatile($code); }
850 EOF
851 }
852
853 check_insn(){
854     log check_insn "$@"
855     check_inline_asm ${1}_inline "$2"
856     check_as ${1}_external "$2"
857 }
858
859 check_x86asm(){
860     log check_x86asm "$@"
861     name=$1
862     shift
863     disable $name
864     test_x86asm "$@" && enable $name
865 }
866
867 ld_o(){
868     eval printf '%s\\n' $LD_O
869 }
870
871 test_ld(){
872     log test_ld "$@"
873     flags=$(filter_out '-l*' "$@")
874     libs=$(filter '-l*' "$@")
875     test_cc $($cflags_filter $flags) || return
876     flags=$($ldflags_filter $flags)
877     libs=$($ldflags_filter $libs)
878     test_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
879 }
880
881 check_ld(){
882     log check_ld "$@"
883     name=$1
884     shift
885     disable $name
886     test_ld $@ && enable $name
887 }
888
889 print_include(){
890     hdr=$1
891     test "${hdr%.h}" = "${hdr}" &&
892         echo "#include $hdr"    ||
893         echo "#include <$hdr>"
894 }
895
896 test_code(){
897     log test_code "$@"
898     check=$1
899     headers=$2
900     code=$3
901     shift 3
902     {
903         for hdr in $headers; do
904             print_include $hdr
905         done
906         echo "int main(void) { $code; return 0; }"
907     } | test_$check "$@"
908 }
909
910 check_cppflags(){
911     log check_cppflags "$@"
912     test_cpp "$@" <<EOF && add_cppflags "$@"
913 #include <stdlib.h>;
914 EOF
915 }
916
917 test_cflags(){
918     log test_cflags "$@"
919     set -- $($cflags_filter "$@")
920     test_cc "$@" <<EOF
921 int x;
922 EOF
923 }
924
925 check_cflags(){
926     log check_cflags "$@"
927     test_cflags "$@" && add_cflags "$@"
928 }
929
930 test_objcflags(){
931     log test_objcflags "$@"
932     set -- $($objcflags_filter "$@")
933     test_objcc "$@" <<EOF
934 int x;
935 EOF
936 }
937
938 check_objcflags(){
939     log check_objcflags "$@"
940     test_objcflags "$@" && add_objcflags "$@"
941 }
942
943 test_ldflags(){
944     log test_ldflags "$@"
945     set -- $($ldflags_filter "$@")
946     test_ld "$@" <<EOF
947 int main(void){ return 0; }
948 EOF
949 }
950
951 check_ldflags(){
952     log check_ldflags "$@"
953     test_ldflags "$@" && add_ldflags "$@"
954 }
955
956 test_stripflags(){
957     log test_stripflags "$@"
958     # call test_cc to get a fresh TMPO
959     test_cc <<EOF
960 int main(void) { return 0; }
961 EOF
962     test_cmd $strip $STRIPFLAGS "$@" $TMPO
963 }
964
965 check_stripflags(){
966     log check_stripflags "$@"
967     test_stripflags "$@" && add_stripflags "$@"
968 }
969
970 check_header(){
971     log check_header "$@"
972     headers=$1
973     shift
974     disable_sanitized $headers
975     {
976         for hdr in $headers; do
977             print_include $hdr
978         done
979         echo "int x;"
980     } | test_cpp "$@" && enable_sanitized $headers
981 }
982
983 check_func(){
984     log check_func "$@"
985     func=$1
986     shift
987     disable $func
988     test_ld "$@" <<EOF && enable $func
989 extern int $func();
990 int main(void){ $func(); }
991 EOF
992 }
993
994 check_mathfunc(){
995     log check_mathfunc "$@"
996     func=$1
997     narg=$2
998     shift 2
999     test $narg = 2 && args="f, g" || args="f"
1000     disable $func
1001     test_ld "$@" <<EOF && enable $func
1002 #include <math.h>
1003 float foo(float f, float g) { return $func($args); }
1004 int main(void){ return 0; }
1005 EOF
1006 }
1007
1008 check_func_headers(){
1009     log check_func_headers "$@"
1010     headers=$1
1011     funcs=$2
1012     shift 2
1013     {
1014         for hdr in $headers; do
1015             print_include $hdr
1016         done
1017         for func in $funcs; do
1018             echo "long check_$func(void) { return (long) $func; }"
1019         done
1020         echo "int main(void) { return 0; }"
1021     } | test_ld "$@" && enable $funcs && enable_sanitized $headers
1022 }
1023
1024 test_cpp_condition(){
1025     log test_cpp_condition "$@"
1026     header=$1
1027     condition=$2
1028     shift 2
1029     test_cpp "$@" <<EOF
1030 #include <$header>
1031 #if !($condition)
1032 #error "unsatisfied condition: $condition"
1033 #endif
1034 EOF
1035 }
1036
1037 check_cpp_condition(){
1038     log check_cpp_condition "$@"
1039     name=$1
1040     shift 1
1041     disable $name
1042     test_cpp_condition "$@" && enable $name
1043 }
1044
1045 check_lib(){
1046     log check_lib "$@"
1047     name="$1"
1048     headers="$2"
1049     funcs="$3"
1050     shift 3
1051     disable $name
1052     check_func_headers "$headers" "$funcs" "$@" &&
1053         enable $name && eval ${name}_extralibs="\$@"
1054 }
1055
1056 test_pkg_config(){
1057     log test_pkg_config "$@"
1058     name="$1"
1059     pkg_version="$2"
1060     pkg="${2%% *}"
1061     headers="$3"
1062     funcs="$4"
1063     shift 4
1064     disable $name
1065     test_cmd $pkg_config --exists --print-errors $pkg_version || return
1066     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1067     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1068     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1069         enable $name &&
1070         set_sanitized "${name}_cflags"    $pkg_cflags &&
1071         set_sanitized "${name}_extralibs" $pkg_libs
1072 }
1073
1074 check_pkg_config(){
1075     log check_pkg_config "$@"
1076     name="$1"
1077     test_pkg_config "$@" &&
1078         eval add_cflags \$${name}_cflags
1079 }
1080
1081 test_exec(){
1082     log test_exec "$@"
1083     test_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1084 }
1085
1086 check_exec_crash(){
1087     log check_exec_crash "$@"
1088     code=$(cat)
1089
1090     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1091     # are safe but may not be available everywhere.  Thus we use
1092     # raise(SIGTERM) instead.  The check is run in a subshell so we
1093     # can redirect the "Terminated" message from the shell.  SIGBUS
1094     # is not defined by standard C so it is used conditionally.
1095
1096     (test_exec "$@") >> $logfile 2>&1 <<EOF
1097 #include <signal.h>
1098 static void sighandler(int sig){
1099     raise(SIGTERM);
1100 }
1101 int foo(void){
1102     $code
1103 }
1104 int (*func_ptr)(void) = foo;
1105 int main(void){
1106     signal(SIGILL, sighandler);
1107     signal(SIGFPE, sighandler);
1108     signal(SIGSEGV, sighandler);
1109 #ifdef SIGBUS
1110     signal(SIGBUS, sighandler);
1111 #endif
1112     return func_ptr();
1113 }
1114 EOF
1115 }
1116
1117 check_type(){
1118     log check_type "$@"
1119     headers=$1
1120     type=$2
1121     shift 2
1122     disable_sanitized "$type"
1123     test_code cc "$headers" "$type v" "$@" && enable_sanitized "$type"
1124 }
1125
1126 check_struct(){
1127     log check_struct "$@"
1128     headers=$1
1129     struct=$2
1130     member=$3
1131     shift 3
1132     disable_sanitized "${struct}_${member}"
1133     test_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1134         enable_sanitized "${struct}_${member}"
1135 }
1136
1137 check_builtin(){
1138     log check_builtin "$@"
1139     name=$1
1140     shift
1141     disable "$name"
1142     test_code ld "$@" && enable "$name"
1143 }
1144
1145 check_compile_assert(){
1146     log check_compile_assert "$@"
1147     name=$1
1148     headers=$2
1149     condition=$3
1150     shift 3
1151     disable "$name"
1152     test_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1153 }
1154
1155 check_cc(){
1156     log check_cc "$@"
1157     name=$1
1158     shift
1159     disable "$name"
1160     test_code cc "$@" && enable "$name"
1161 }
1162
1163 require(){
1164     log require "$@"
1165     name_version="$1"
1166     name="${1%% *}"
1167     shift
1168     check_lib $name "$@" || die "ERROR: $name_version not found"
1169 }
1170
1171 require_cc(){
1172     log require_cc "$@"
1173     name="$1"
1174     shift
1175     test_code cc "$@" || die "ERROR: $name failed"
1176 }
1177
1178 require_header(){
1179     log require_header "$@"
1180     headers="$1"
1181     check_header "$@" || die "ERROR: $headers not found"
1182 }
1183
1184 require_cpp_condition(){
1185     log require_cpp_condition "$@"
1186     condition="$2"
1187     test_cpp_condition "$@" || die "ERROR: $condition not satisfied"
1188 }
1189
1190 require_pkg_config(){
1191     log require_pkg_config "$@"
1192     pkg_version="$2"
1193     check_pkg_config "$@" || die "ERROR: $pkg_version not found"
1194 }
1195
1196 hostcc_e(){
1197     eval printf '%s\\n' $HOSTCC_E
1198 }
1199
1200 hostcc_o(){
1201     eval printf '%s\\n' $HOSTCC_O
1202 }
1203
1204 test_host_cc(){
1205     log test_host_cc "$@"
1206     cat > $TMPC
1207     log_file $TMPC
1208     test_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1209 }
1210
1211 test_host_cpp(){
1212     log test_host_cpp "$@"
1213     cat > $TMPC
1214     log_file $TMPC
1215     test_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1216 }
1217
1218 check_host_cppflags(){
1219     log check_host_cppflags "$@"
1220     test_host_cpp "$@" <<EOF && append host_cppflags "$@"
1221 #include <stdlib.h>;
1222 EOF
1223 }
1224
1225 check_host_cflags(){
1226     log check_host_cflags "$@"
1227     set -- $($host_cflags_filter "$@")
1228     test_host_cc "$@" <<EOF && append host_cflags "$@"
1229 int x;
1230 EOF
1231 }
1232
1233 test_host_cpp_condition(){
1234     log test_host_cpp_condition "$@"
1235     header=$1
1236     condition=$2
1237     shift 2
1238     test_host_cpp "$@" <<EOF
1239 #include <$header>
1240 #if !($condition)
1241 #error "unsatisfied condition: $condition"
1242 #endif
1243 EOF
1244 }
1245
1246 check_host_cpp_condition(){
1247     log check_host_cpp_condition "$@"
1248     name=$1
1249     shift 1
1250     disable $name
1251     test_host_cpp_condition "$@" && enable $name
1252 }
1253
1254 cp_if_changed(){
1255     cmp -s "$1" "$2" && { test "$quiet" != "yes" && echo "$2 is unchanged"; } && return
1256     mkdir -p "$(dirname $2)"
1257     cp -f "$1" "$2"
1258 }
1259
1260 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1261 # system-dependent things.
1262
1263 AVCODEC_COMPONENTS="
1264     bsfs
1265     decoders
1266     encoders
1267     hwaccels
1268     parsers
1269 "
1270
1271 AVDEVICE_COMPONENTS="
1272     indevs
1273 "
1274 AVFILTER_COMPONENTS="
1275     filters
1276 "
1277 AVFORMAT_COMPONENTS="
1278     demuxers
1279     muxers
1280     protocols
1281 "
1282
1283 COMPONENT_LIST="
1284     $AVCODEC_COMPONENTS
1285     $AVDEVICE_COMPONENTS
1286     $AVFILTER_COMPONENTS
1287     $AVFORMAT_COMPONENTS
1288 "
1289
1290 EXAMPLE_LIST="
1291     decode_audio_example
1292     decode_video_example
1293     encode_audio_example
1294     encode_video_example
1295     filter_audio_example
1296     metadata_example
1297     output_example
1298     qsvdec_example
1299     transcode_aac_example
1300 "
1301
1302 # catchall list of things that require external libs to link
1303 EXTRALIBS_LIST="
1304     cpu_init
1305     cws2fws
1306 "
1307
1308 HWACCEL_LIBRARY_NONFREE_LIST="
1309     cuda
1310     cuvid
1311     libnpp
1312 "
1313 HWACCEL_LIBRARY_LIST="
1314     $HWACCEL_LIBRARY_NONFREE_LIST
1315     amf
1316     d3d11va
1317     dxva2
1318     libmfx
1319     mmal
1320     nvenc
1321     omx
1322     vaapi
1323     vda
1324     vdpau
1325 "
1326
1327 EXTERNAL_LIBRARY_GPL_LIST="
1328     libcdio
1329     libx264
1330     libx265
1331     libxavs
1332     libxvid
1333 "
1334
1335 EXTERNAL_LIBRARY_NONFREE_LIST="
1336     libfaac
1337     libfdk_aac
1338     openssl
1339 "
1340
1341 EXTERNAL_LIBRARY_VERSION3_LIST="
1342     libopencore_amrnb
1343     libopencore_amrwb
1344     libvo_aacenc
1345     libvo_amrwbenc
1346 "
1347
1348 EXTERNAL_LIBRARY_LIST="
1349     $EXTERNAL_LIBRARY_GPL_LIST
1350     $EXTERNAL_LIBRARY_NONFREE_LIST
1351     $EXTERNAL_LIBRARY_VERSION3_LIST
1352     avisynth
1353     avxsynth
1354     frei0r
1355     gnutls
1356     libaom
1357     libbs2b
1358     libdc1394
1359     libdcadec
1360     libfontconfig
1361     libfreetype
1362     libgsm
1363     libhdcd
1364     libilbc
1365     libjack
1366     libkvazaar
1367     libmp3lame
1368     libopencv
1369     libopenh264
1370     libopenjpeg
1371     libopus
1372     libpulse
1373     librtmp
1374     libschroedinger
1375     libsnappy
1376     libspeex
1377     libtheora
1378     libtwolame
1379     libvorbis
1380     libvpx
1381     libwavpack
1382     libwebp
1383     libxcb
1384     libxcb_shm
1385     libxcb_xfixes
1386 "
1387
1388 SYSTEM_LIBRARY_LIST="
1389     bzlib
1390     zlib
1391 "
1392
1393 FEATURE_LIST="
1394     gray
1395     hardcoded_tables
1396     omx_rpi
1397     runtime_cpudetect
1398     safe_bitstream_reader
1399     shared
1400     small
1401     sram
1402     static
1403     swscale_alpha
1404 "
1405
1406 LIBRARY_LIST="
1407     avcodec
1408     avdevice
1409     avfilter
1410     avformat
1411     avresample
1412     avutil
1413     swscale
1414 "
1415
1416 LICENSE_LIST="
1417     gpl
1418     nonfree
1419     version3
1420 "
1421
1422 PROGRAM_LIST="
1423     avconv
1424     avplay
1425     avprobe
1426 "
1427
1428 SUBSYSTEM_LIST="
1429     dct
1430     doc
1431     error_resilience
1432     faan
1433     fft
1434     lsp
1435     lzo
1436     mdct
1437     network
1438     rdft
1439 "
1440
1441 # COMPONENT_LIST needs to come last to ensure correct dependency checking
1442 CONFIG_LIST="
1443     $EXAMPLE_LIST
1444     $EXTERNAL_LIBRARY_LIST
1445     $HWACCEL_LIBRARY_LIST
1446     $FEATURE_LIST
1447     $LICENSE_LIST
1448     $LIBRARY_LIST
1449     $PROGRAM_LIST
1450     $SUBSYSTEM_LIST
1451     $SYSTEM_LIBRARY_LIST
1452     neon_clobber_test
1453     pic
1454     pod2man
1455     texi2html
1456     thumb
1457     valgrind_backtrace
1458     xmm_clobber_test
1459     $COMPONENT_LIST
1460 "
1461
1462 THREADS_LIST="
1463     pthreads
1464     w32threads
1465 "
1466
1467 ATOMICS_LIST="
1468     atomics_gcc
1469     atomics_suncc
1470     atomics_win32
1471 "
1472
1473 ARCH_LIST="
1474     aarch64
1475     alpha
1476     arm
1477     avr32
1478     avr32_ap
1479     avr32_uc
1480     bfin
1481     ia64
1482     m68k
1483     mips
1484     mips64
1485     parisc
1486     ppc
1487     ppc64
1488     s390
1489     sh4
1490     sparc
1491     sparc64
1492     tilegx
1493     tilepro
1494     tomi
1495     x86
1496     x86_32
1497     x86_64
1498 "
1499
1500 ARCH_EXT_LIST_ARM="
1501     armv5te
1502     armv6
1503     armv6t2
1504     armv8
1505     neon
1506     vfp
1507     vfpv3
1508 "
1509
1510 ARCH_EXT_LIST_X86_SIMD="
1511     amd3dnow
1512     amd3dnowext
1513     avx
1514     avx2
1515     fma3
1516     fma4
1517     mmx
1518     mmxext
1519     sse
1520     sse2
1521     sse3
1522     sse4
1523     sse42
1524     ssse3
1525     xop
1526 "
1527
1528 ARCH_EXT_LIST_PPC="
1529     altivec
1530     dcbzl
1531     ldbrx
1532     power8
1533     ppc4xx
1534     vsx
1535 "
1536
1537 ARCH_EXT_LIST_X86="
1538     $ARCH_EXT_LIST_X86_SIMD
1539     cpunop
1540     i686
1541 "
1542
1543 ARCH_EXT_LIST_MIPS="
1544     loongson
1545     mips32r1
1546     mips64r1
1547     mips32r2
1548     mips64r2
1549     mips32r6
1550     mips64r6
1551 "
1552
1553 ARCH_EXT_LIST="
1554     $ARCH_EXT_LIST_ARM
1555     $ARCH_EXT_LIST_MIPS
1556     $ARCH_EXT_LIST_PPC
1557     $ARCH_EXT_LIST_X86
1558     vis
1559 "
1560
1561 ARCH_FEATURES="
1562     aligned_stack
1563     fast_64bit
1564     fast_clz
1565     fast_cmov
1566     local_aligned_8
1567     local_aligned_16
1568     local_aligned_32
1569     simd_align_16
1570     simd_align_32
1571 "
1572
1573 BUILTIN_LIST="
1574     atomic_cas_ptr
1575     machine_rw_barrier
1576     MemoryBarrier
1577     mm_empty
1578     rdtsc
1579     sem_timedwait
1580     sync_val_compare_and_swap
1581 "
1582 HAVE_LIST_CMDLINE="
1583     inline_asm
1584     symver
1585     x86asm
1586 "
1587
1588 HAVE_LIST_PUB="
1589     bigendian
1590     fast_unaligned
1591 "
1592
1593 HEADERS_LIST="
1594     AVFoundation_AVFoundation_h
1595     arpa_inet_h
1596     cdio_paranoia_h
1597     cdio_paranoia_paranoia_h
1598     dispatch_dispatch_h
1599     dev_bktr_ioctl_bt848_h
1600     dev_bktr_ioctl_meteor_h
1601     dev_ic_bt8xx_h
1602     dev_video_bktr_ioctl_bt848_h
1603     dev_video_meteor_ioctl_meteor_h
1604     direct_h
1605     dxgidebug_h
1606     dxva_h
1607     io_h
1608     machine_ioctl_bt848_h
1609     machine_ioctl_meteor_h
1610     malloc_h
1611     poll_h
1612     sys_param_h
1613     sys_resource_h
1614     sys_select_h
1615     sys_soundcard_h
1616     sys_time_h
1617     sys_un_h
1618     sys_videoio_h
1619     unistd_h
1620     valgrind_valgrind_h
1621     windows_h
1622     winsock2_h
1623 "
1624
1625 INTRINSICS_LIST="
1626     intrinsics_neon
1627 "
1628
1629 MATH_FUNCS="
1630     atanf
1631     atan2f
1632     cbrtf
1633     cosf
1634     exp2
1635     exp2f
1636     expf
1637     isinf
1638     isnan
1639     ldexpf
1640     llrint
1641     llrintf
1642     log2
1643     log2f
1644     log10f
1645     lrint
1646     lrintf
1647     powf
1648     rint
1649     round
1650     roundf
1651     sinf
1652     trunc
1653     truncf
1654 "
1655
1656 SYSTEM_FEATURES="
1657     dos_paths
1658     libc_msvcrt
1659     MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
1660     section_data_rel_ro
1661     threads
1662     uwp
1663 "
1664
1665 SYSTEM_FUNCS="
1666     aligned_malloc
1667     clock_gettime
1668     closesocket
1669     CommandLineToArgvW
1670     fcntl
1671     getaddrinfo
1672     gethrtime
1673     getopt
1674     GetProcessAffinityMask
1675     GetProcessMemoryInfo
1676     GetProcessTimes
1677     getrusage
1678     GetSystemTimeAsFileTime
1679     gettimeofday
1680     gmtime_r
1681     inet_aton
1682     isatty
1683     localtime_r
1684     mach_absolute_time
1685     MapViewOfFile
1686     memalign
1687     mmap
1688     mprotect
1689     nanosleep
1690     posix_memalign
1691     sched_getaffinity
1692     SetConsoleTextAttribute
1693     setmode
1694     setrlimit
1695     Sleep
1696     strerror_r
1697     sysconf
1698     sysctl
1699     usleep
1700     VirtualAlloc
1701 "
1702
1703 SYSTEM_LIBRARIES="
1704     sdl
1705     vaapi_1
1706     vaapi_drm
1707     vaapi_x11
1708     vdpau_x11
1709     wincrypt
1710 "
1711
1712 TOOLCHAIN_FEATURES="
1713     as_arch_directive
1714     as_fpu_directive
1715     as_func
1716     as_object_arch
1717     asm_mod_q
1718     blocks_extension
1719     ebp_available
1720     ebx_available
1721     gnu_as
1722     ibm_asm
1723     inline_asm_labels
1724     pragma_deprecated
1725     symver_asm_label
1726     symver_gnu_asm
1727     vfp_args
1728     xform_asm
1729     xmm_clobbers
1730 "
1731
1732 TYPES_LIST="
1733     CONDITION_VARIABLE_Ptr
1734     CUVIDDECODECREATEINFO_bitDepthMinus8
1735     socklen_t
1736     struct_addrinfo
1737     struct_group_source_req
1738     struct_ip_mreq_source
1739     struct_ipv6_mreq
1740     struct_pollfd
1741     struct_rusage_ru_maxrss
1742     struct_sockaddr_in6
1743     struct_sockaddr_sa_len
1744     struct_sockaddr_storage
1745     struct_v4l2_frmivalenum_discrete
1746 "
1747
1748 HAVE_LIST="
1749     $ARCH_EXT_LIST
1750     $(add_suffix _external $ARCH_EXT_LIST)
1751     $(add_suffix _inline   $ARCH_EXT_LIST)
1752     $ARCH_FEATURES
1753     $BUILTIN_LIST
1754     $HAVE_LIST_CMDLINE
1755     $HAVE_LIST_PUB
1756     $HEADERS_LIST
1757     $INTRINSICS_LIST
1758     $MATH_FUNCS
1759     $SYSTEM_FEATURES
1760     $SYSTEM_FUNCS
1761     $SYSTEM_LIBRARIES
1762     $THREADS_LIST
1763     $TOOLCHAIN_FEATURES
1764     $TYPES_LIST
1765 "
1766
1767 # options emitted with CONFIG_ prefix but not available on the command line
1768 CONFIG_EXTRA="
1769     aandcttables
1770     ac3dsp
1771     adts_header
1772     audio_frame_queue
1773     audiodsp
1774     blockdsp
1775     bswapdsp
1776     cabac
1777     cbs
1778     cbs_h264
1779     cbs_h265
1780     cbs_mpeg2
1781     dirac_parse
1782     dvprofile
1783     faandct
1784     faanidct
1785     fdctdsp
1786     flacdsp
1787     fmtconvert
1788     g722dsp
1789     gmp
1790     golomb
1791     gplv3
1792     h263dsp
1793     h264chroma
1794     h264dsp
1795     h264parse
1796     h264pred
1797     h264qpel
1798     hevcparse
1799     hpeldsp
1800     huffman
1801     huffyuvdsp
1802     huffyuvencdsp
1803     idctdsp
1804     iirfilter
1805     imdct15
1806     intrax8
1807     iso_media
1808     ividsp
1809     jpegtables
1810     lgplv3
1811     libx262
1812     libxcb_shape
1813     lpc
1814     lzf
1815     me_cmp
1816     mpeg_er
1817     mpegaudio
1818     mpegaudiodsp
1819     mpegaudioheader
1820     mpegvideo
1821     mpegvideoenc
1822     mss34dsp
1823     pixblockdsp
1824     qpeldsp
1825     qsv
1826     qsvdec
1827     qsvenc
1828     qsvvpp
1829     rangecoder
1830     riffdec
1831     riffenc
1832     rtpdec
1833     rtpenc_chain
1834     rv34dsp
1835     sinewin
1836     snappy
1837     srtp
1838     startcode
1839     texturedsp
1840     texturedspenc
1841     tpeldsp
1842     vaapi_encode
1843     vc1dsp
1844     videodsp
1845     vp3dsp
1846     vp56dsp
1847     vp8dsp
1848     wma_freqs
1849     wmv2dsp
1850 "
1851
1852 CMDLINE_SELECT="
1853     $ARCH_EXT_LIST
1854     $CONFIG_LIST
1855     $HAVE_LIST_CMDLINE
1856     $THREADS_LIST
1857     asm
1858     cross_compile
1859     debug
1860     extra_warnings
1861     logging
1862     lto
1863     optimizations
1864     rpath
1865 "
1866
1867 PATHS_LIST="
1868     bindir
1869     datadir
1870     docdir
1871     incdir
1872     libdir
1873     mandir
1874     prefix
1875     shlibdir
1876 "
1877
1878 CMDLINE_SET="
1879     $PATHS_LIST
1880     ar
1881     arch
1882     as
1883     cc
1884     objcc
1885     cpu
1886     cross_prefix
1887     custom_allocator
1888     dep_cc
1889     env
1890     extra_version
1891     host_cc
1892     host_cflags
1893     host_extralibs
1894     host_ld
1895     host_ldflags
1896     host_os
1897     ignore_tests
1898     ld
1899     logfile
1900     malloc_prefix
1901     nm
1902     optflags
1903     pkg_config
1904     pkg_config_flags
1905     samples
1906     sysinclude
1907     sysroot
1908     target_exec
1909     target_os
1910     target_path
1911     target_samples
1912     toolchain
1913     x86asmexe
1914 "
1915
1916 CMDLINE_APPEND="
1917     extra_cflags
1918     extra_objcflags
1919     host_cppflags
1920 "
1921
1922 # code dependency declarations
1923
1924 # architecture extensions
1925
1926 armv5te_deps="arm"
1927 armv6_deps="arm"
1928 armv6t2_deps="arm"
1929 armv8_deps="aarch64"
1930 neon_deps_any="aarch64 arm"
1931 intrinsics_neon_deps="neon"
1932 vfp_deps_any="aarch64 arm"
1933 vfpv3_deps="vfp"
1934
1935 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1936
1937 altivec_deps="ppc"
1938 dcbzl_deps="ppc"
1939 ldbrx_deps="ppc"
1940 ppc4xx_deps="ppc"
1941 vsx_deps="altivec"
1942 power8_deps="vsx"
1943
1944 loongson_deps="mips"
1945 mips32r1_deps="mips32"
1946 mips32r2_deps="mips32"
1947 mips32r6_deps="mips32"
1948 mips64r1_deps="mips64"
1949 mips64r2_deps="mips64"
1950 mips64r6_deps="mips64"
1951
1952 vis_deps="sparc"
1953
1954 cpunop_deps="i686"
1955 x86_64_select="i686"
1956 x86_64_suggest="fast_cmov"
1957
1958 amd3dnow_deps="mmx"
1959 amd3dnowext_deps="amd3dnow"
1960 i686_deps="x86"
1961 mmx_deps="x86"
1962 mmxext_deps="mmx"
1963 sse_deps="mmxext"
1964 sse2_deps="sse"
1965 sse3_deps="sse2"
1966 ssse3_deps="sse3"
1967 sse4_deps="ssse3"
1968 sse42_deps="sse4"
1969 avx_deps="sse42"
1970 xop_deps="avx"
1971 fma3_deps="avx"
1972 fma4_deps="avx"
1973 avx2_deps="avx"
1974
1975 mmx_external_deps="x86asm"
1976 mmx_inline_deps="inline_asm x86"
1977 mmx_suggest="mmx_external mmx_inline"
1978
1979 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1980     eval dep=\$${ext}_deps
1981     eval ${ext}_external_deps='"${dep}_external"'
1982     eval ${ext}_inline_deps='"${dep}_inline"'
1983     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1984 done
1985
1986 aligned_stack_if_any="aarch64 ppc x86"
1987 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1988 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1989 fast_unaligned_if_any="aarch64 ppc x86"
1990 simd_align_16_if_any="altivec neon sse"
1991 simd_align_32_if_any="avx"
1992
1993 # system capabilities
1994 symver_if_any="symver_asm_label symver_gnu_asm"
1995 valgrind_backtrace_conflict="optimizations"
1996 valgrind_backtrace_deps="valgrind_valgrind_h"
1997
1998 # threading support
1999 atomics_gcc_if="sync_val_compare_and_swap"
2000 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
2001 atomics_win32_if="MemoryBarrier"
2002 atomics_native_if_any="$ATOMICS_LIST"
2003 w32threads_deps="atomics_native"
2004 threads_if_any="$THREADS_LIST"
2005
2006 # subsystems
2007 cbs_h264_select="cbs golomb"
2008 cbs_h265_select="cbs golomb"
2009 cbs_mpeg2_select="cbs"
2010 dct_select="rdft"
2011 dirac_parse_select="golomb"
2012 error_resilience_select="me_cmp"
2013 faandct_deps="faan"
2014 faandct_select="fdctdsp"
2015 faanidct_deps="faan"
2016 faanidct_select="idctdsp"
2017 h264dsp_select="startcode"
2018 hevcparse_select="golomb"
2019 intrax8_select="blockdsp idctdsp"
2020 mdct_select="fft"
2021 rdft_select="fft"
2022 me_cmp_select="fdctdsp idctdsp pixblockdsp"
2023 mpeg_er_select="error_resilience"
2024 mpegaudio_select="mpegaudiodsp mpegaudioheader"
2025 mpegaudiodsp_select="dct"
2026 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp mpeg_er videodsp"
2027 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
2028 vc1dsp_select="h264chroma qpeldsp startcode"
2029
2030 # decoders / encoders
2031 aac_decoder_select="adts_header imdct15 mdct sinewin"
2032 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
2033 aac_latm_decoder_select="aac_decoder aac_latm_parser"
2034 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
2035 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
2036 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
2037 adpcm_g722_decoder_select="g722dsp"
2038 adpcm_g722_encoder_select="g722dsp"
2039 aic_decoder_select="golomb idctdsp"
2040 alac_encoder_select="lpc"
2041 als_decoder_select="bswapdsp"
2042 amrnb_decoder_select="lsp"
2043 amrwb_decoder_select="lsp"
2044 amv_decoder_select="sp5x_decoder"
2045 ape_decoder_select="bswapdsp"
2046 asv1_decoder_select="blockdsp bswapdsp idctdsp"
2047 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
2048 asv2_decoder_select="blockdsp bswapdsp idctdsp"
2049 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
2050 atrac1_decoder_select="mdct sinewin"
2051 atrac3_decoder_select="mdct"
2052 atrac3p_decoder_select="mdct sinewin"
2053 bink_decoder_select="blockdsp hpeldsp"
2054 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
2055 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
2056 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
2057 clearvideo_decoder_select="idctdsp"
2058 cllc_decoder_select="bswapdsp"
2059 comfortnoise_encoder_select="lpc"
2060 cook_decoder_select="audiodsp mdct sinewin"
2061 cscd_decoder_select="lzo"
2062 cscd_decoder_suggest="zlib"
2063 dca_decoder_select="fmtconvert mdct"
2064 dds_decoder_select="texturedsp"
2065 dnxhd_decoder_select="blockdsp idctdsp"
2066 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
2067 dvvideo_decoder_select="dvprofile idctdsp"
2068 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
2069 dxa_decoder_deps="zlib"
2070 dxv_decoder_select="lzf texturedsp"
2071 eac3_decoder_select="ac3_decoder"
2072 eac3_encoder_select="ac3_encoder"
2073 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
2074 eatgq_decoder_select="aandcttables idctdsp"
2075 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
2076 exr_decoder_deps="zlib"
2077 ffv1_decoder_select="rangecoder"
2078 ffv1_encoder_select="rangecoder"
2079 ffvhuff_decoder_select="huffyuv_decoder"
2080 ffvhuff_encoder_select="huffyuv_encoder"
2081 fic_decoder_select="golomb"
2082 flac_decoder_select="flacdsp"
2083 flac_encoder_select="bswapdsp flacdsp lpc"
2084 flashsv_decoder_deps="zlib"
2085 flashsv_encoder_deps="zlib"
2086 flashsv2_decoder_deps="zlib"
2087 flv_decoder_select="h263_decoder"
2088 flv_encoder_select="h263_encoder"
2089 fourxm_decoder_select="blockdsp bswapdsp"
2090 fraps_decoder_select="bswapdsp huffman"
2091 g2m_decoder_deps="zlib"
2092 g2m_decoder_select="blockdsp idctdsp jpegtables"
2093 h261_decoder_select="mpeg_er mpegvideo"
2094 h261_encoder_select="aandcttables mpegvideoenc"
2095 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
2096 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
2097 h263i_decoder_select="h263_decoder"
2098 h263p_encoder_select="h263_encoder"
2099 h264_decoder_select="cabac golomb h264chroma h264dsp h264parse h264pred h264qpel videodsp"
2100 h264_decoder_suggest="error_resilience"
2101 hap_decoder_select="snappy texturedsp"
2102 hap_encoder_deps="libsnappy"
2103 hap_encoder_select="texturedspenc"
2104 hevc_decoder_select="bswapdsp cabac hevcparse videodsp"
2105 huffyuv_decoder_select="bswapdsp huffyuvdsp"
2106 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
2107 iac_decoder_select="imc_decoder"
2108 imc_decoder_select="bswapdsp fft mdct sinewin"
2109 indeo3_decoder_select="hpeldsp"
2110 indeo4_decoder_select="ividsp"
2111 indeo5_decoder_select="ividsp"
2112 interplay_video_decoder_select="hpeldsp"
2113 jpegls_decoder_select="mjpeg_decoder"
2114 jv_decoder_select="blockdsp"
2115 lagarith_decoder_select="huffyuvdsp"
2116 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
2117 magicyuv_decoder_select="huffyuvdsp"
2118 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2119 metasound_decoder_select="lsp mdct sinewin"
2120 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2121 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
2122 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
2123 mjpegb_decoder_select="mjpeg_decoder"
2124 mlp_decoder_select="mlp_parser"
2125 motionpixels_decoder_select="bswapdsp"
2126 mp1_decoder_select="mpegaudio"
2127 mp1float_decoder_select="mpegaudio"
2128 mp2_decoder_select="mpegaudio"
2129 mp2float_decoder_select="mpegaudio"
2130 mp3_decoder_select="mpegaudio"
2131 mp3adu_decoder_select="mpegaudio"
2132 mp3adufloat_decoder_select="mpegaudio"
2133 mp3float_decoder_select="mpegaudio"
2134 mp3on4_decoder_select="mpegaudio"
2135 mp3on4float_decoder_select="mpegaudio"
2136 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2137 mpc8_decoder_select="mpegaudiodsp"
2138 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2139 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2140 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2141 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2142 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2143 mpeg4_encoder_select="h263_encoder"
2144 msa1_decoder_select="mss34dsp"
2145 msmpeg4v1_decoder_select="h263_decoder"
2146 msmpeg4v2_decoder_select="h263_decoder"
2147 msmpeg4v2_encoder_select="h263_encoder"
2148 msmpeg4v3_decoder_select="h263_decoder"
2149 msmpeg4v3_encoder_select="h263_encoder"
2150 mss2_decoder_select="error_resilience mpeg_er mpegvideo qpeldsp vc1_decoder"
2151 mts2_decoder_select="mss34dsp"
2152 mxpeg_decoder_select="mjpeg_decoder"
2153 nellymoser_decoder_select="mdct sinewin"
2154 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2155 nuv_decoder_select="idctdsp lzo"
2156 on2avc_decoder_select="mdct"
2157 opus_decoder_deps="avresample"
2158 opus_decoder_select="imdct15"
2159 png_decoder_deps="zlib"
2160 png_encoder_deps="zlib"
2161 png_encoder_select="huffyuvencdsp"
2162 prores_decoder_select="idctdsp"
2163 prores_encoder_select="fdctdsp"
2164 qcelp_decoder_select="lsp"
2165 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2166 ra_144_encoder_select="audio_frame_queue lpc"
2167 ralf_decoder_select="golomb"
2168 rscc_decoder_deps="zlib"
2169 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2170 rv10_encoder_select="h263_encoder"
2171 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2172 rv20_encoder_select="h263_encoder"
2173 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2174 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2175 screenpresso_decoder_deps="zlib"
2176 sipr_decoder_select="lsp"
2177 sp5x_decoder_select="mjpeg_decoder"
2178 svq1_decoder_select="hpeldsp"
2179 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2180 svq3_decoder_select="golomb h264dsp h264parse h264pred hpeldsp tpeldsp videodsp"
2181 svq3_decoder_suggest="zlib"
2182 tak_decoder_select="audiodsp"
2183 tdsc_decoder_deps="zlib"
2184 tdsc_decoder_select="mjpeg_decoder"
2185 theora_decoder_select="vp3_decoder"
2186 thp_decoder_select="mjpeg_decoder"
2187 tiff_decoder_suggest="zlib"
2188 tiff_encoder_suggest="zlib"
2189 truehd_decoder_select="mlp_decoder"
2190 truemotion2_decoder_select="bswapdsp"
2191 truespeech_decoder_select="bswapdsp"
2192 tscc_decoder_deps="zlib"
2193 txd_decoder_select="texturedsp"
2194 twinvq_decoder_select="mdct lsp sinewin"
2195 utvideo_decoder_select="bswapdsp huffyuvdsp"
2196 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2197 vble_decoder_select="huffyuvdsp"
2198 vc1_decoder_select="blockdsp error_resilience h263_decoder h264qpel intrax8 mpeg_er mpegvideo vc1dsp"
2199 vc1image_decoder_select="vc1_decoder"
2200 vorbis_decoder_select="mdct"
2201 vorbis_encoder_select="mdct"
2202 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2203 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2204 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2205 vp6a_decoder_select="vp6_decoder"
2206 vp6f_decoder_select="vp6_decoder"
2207 vp7_decoder_select="h264pred videodsp vp8dsp"
2208 vp8_decoder_select="h264pred videodsp vp8dsp"
2209 vp9_decoder_select="videodsp vp9_superframe_split_bsf"
2210 webp_decoder_select="vp8_decoder"
2211 wmapro_decoder_select="mdct sinewin wma_freqs"
2212 wmav1_decoder_select="mdct sinewin wma_freqs"
2213 wmav1_encoder_select="mdct sinewin wma_freqs"
2214 wmav2_decoder_select="mdct sinewin wma_freqs"
2215 wmav2_encoder_select="mdct sinewin wma_freqs"
2216 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2217 wmv1_decoder_select="h263_decoder"
2218 wmv1_encoder_select="h263_encoder"
2219 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2220 wmv2_encoder_select="h263_encoder wmv2dsp"
2221 wmv3_decoder_select="vc1_decoder"
2222 wmv3image_decoder_select="wmv3_decoder"
2223 zerocodec_decoder_deps="zlib"
2224 zlib_decoder_deps="zlib"
2225 zlib_encoder_deps="zlib"
2226 zmbv_decoder_deps="zlib"
2227 zmbv_encoder_deps="zlib"
2228
2229 # hardware accelerators
2230 d3d11va_deps="dxva_h ID3D11VideoDecoder"
2231 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode ole32"
2232 vda_deps="VideoDecodeAcceleration_VDADecoder_h blocks_extension pthreads"
2233 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2234
2235 h263_vaapi_hwaccel_deps="vaapi"
2236 h263_vaapi_hwaccel_select="h263_decoder"
2237 h264_cuvid_hwaccel_deps="cuvid CUVIDH264PICPARAMS"
2238 h264_cuvid_hwaccel_select="h264_decoder"
2239 h264_d3d11va_hwaccel_deps="d3d11va"
2240 h264_d3d11va_hwaccel_select="h264_decoder"
2241 h264_d3d11va2_hwaccel_deps="d3d11va"
2242 h264_d3d11va2_hwaccel_select="h264_decoder"
2243 h264_dxva2_hwaccel_deps="dxva2"
2244 h264_dxva2_hwaccel_select="h264_decoder"
2245 h264_vaapi_hwaccel_deps="vaapi"
2246 h264_vaapi_hwaccel_select="h264_decoder"
2247 h264_vda_hwaccel_deps="vda"
2248 h264_vda_hwaccel_select="h264_decoder"
2249 h264_vda_old_hwaccel_deps="vda"
2250 h264_vda_old_hwaccel_select="h264_decoder"
2251 h264_vdpau_hwaccel_deps="vdpau"
2252 h264_vdpau_hwaccel_select="h264_decoder"
2253 hevc_cuvid_hwaccel_deps="cuvid CUVIDHEVCPICPARAMS"
2254 hevc_cuvid_hwaccel_select="hevc_decoder"
2255 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2256 hevc_d3d11va_hwaccel_select="hevc_decoder"
2257 hevc_d3d11va2_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2258 hevc_d3d11va2_hwaccel_select="hevc_decoder"
2259 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2260 hevc_dxva2_hwaccel_select="hevc_decoder"
2261 hevc_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferHEVC"
2262 hevc_vaapi_hwaccel_select="hevc_decoder"
2263 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2264 hevc_vdpau_hwaccel_select="hevc_decoder"
2265 mpeg1_vdpau_hwaccel_deps="vdpau"
2266 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2267 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2268 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2269 mpeg2_d3d11va2_hwaccel_deps="d3d11va"
2270 mpeg2_d3d11va2_hwaccel_select="mpeg2video_decoder"
2271 mpeg2_dxva2_hwaccel_deps="dxva2"
2272 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2273 mpeg2_vaapi_hwaccel_deps="vaapi"
2274 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2275 mpeg2_vdpau_hwaccel_deps="vdpau"
2276 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2277 mpeg4_vaapi_hwaccel_deps="vaapi"
2278 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2279 mpeg4_vdpau_hwaccel_deps="vdpau"
2280 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2281 vc1_d3d11va_hwaccel_deps="d3d11va"
2282 vc1_d3d11va_hwaccel_select="vc1_decoder"
2283 vc1_d3d11va2_hwaccel_deps="d3d11va"
2284 vc1_d3d11va2_hwaccel_select="vc1_decoder"
2285 vc1_dxva2_hwaccel_deps="dxva2"
2286 vc1_dxva2_hwaccel_select="vc1_decoder"
2287 vc1_vaapi_hwaccel_deps="vaapi"
2288 vc1_vaapi_hwaccel_select="vc1_decoder"
2289 vc1_vdpau_hwaccel_deps="vdpau"
2290 vc1_vdpau_hwaccel_select="vc1_decoder"
2291 vp8_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferVP8"
2292 vp8_vaapi_hwaccel_select="vp8_decoder"
2293 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2294 wmv3_d3d11va2_hwaccel_select="vc1_d3d11va2_hwaccel"
2295 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2296 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2297 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2298
2299 # hardware-accelerated codecs
2300 amf_deps_any="libdl LoadLibrary"
2301 nvenc_deps_any="libdl LoadLibrary"
2302 omx_deps="libdl pthreads"
2303 omx_rpi_select="omx"
2304 qsv_deps="libmfx"
2305 qsvdec_select="qsv"
2306 qsvenc_select="qsv"
2307 qsvvpp_select="qsv"
2308 vaapi_encode_deps="vaapi"
2309
2310 hwupload_cuda_filter_deps="cuda"
2311 scale_npp_filter_deps="cuda libnpp"
2312
2313 h264_amf_encoder_deps="amf"
2314 h264_mmal_decoder_deps="mmal"
2315 h264_nvenc_encoder_deps="nvenc"
2316 h264_omx_encoder_deps="omx"
2317 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec"
2318 h264_qsv_encoder_select="qsvenc"
2319 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
2320 h264_vaapi_encoder_select="cbs_h264 vaapi_encode"
2321 hevc_amf_encoder_deps="amf"
2322 hevc_nvenc_encoder_deps="nvenc"
2323 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser qsvdec"
2324 hevc_qsv_encoder_select="hevcparse qsvenc"
2325 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
2326 hevc_vaapi_encoder_select="cbs_h265 vaapi_encode"
2327 mjpeg_qsv_encoder_deps="libmfx"
2328 mjpeg_qsv_encoder_select="qsvenc"
2329 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
2330 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
2331 mpeg2_mmal_decoder_deps="mmal"
2332 mpeg2_qsv_decoder_select="qsvdec mpegvideo_parser"
2333 mpeg2_qsv_encoder_select="qsvenc"
2334 mpeg2_vaapi_encoder_deps="VAEncPictureParameterBufferMPEG2"
2335 mpeg2_vaapi_encoder_select="cbs_mpeg2 vaapi_encode"
2336 mpeg4_omx_encoder_deps="omx"
2337 vc1_mmal_decoder_deps="mmal"
2338 vc1_qsv_decoder_select="qsvdec vc1_parser"
2339 vp8_qsv_decoder_select="qsvdec vp8_parser"
2340 vp8_vaapi_encoder_deps="VAEncPictureParameterBufferVP8"
2341 vp8_vaapi_encoder_select="vaapi_encode"
2342 vp9_vaapi_encoder_deps="VAEncPictureParameterBufferVP9"
2343 vp9_vaapi_encoder_select="vaapi_encode"
2344
2345 nvenc_h264_encoder_select="h264_nvenc_encoder"
2346 nvenc_hevc_encoder_select="hevc_nvenc_encoder"
2347
2348 # parsers
2349 aac_parser_select="adts_header"
2350 h264_parser_select="golomb h264dsp h264parse"
2351 hevc_parser_select="hevcparse"
2352 mpegaudio_parser_select="mpegaudioheader"
2353 mpegvideo_parser_select="mpegvideo"
2354 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2355 vc1_parser_select="vc1dsp"
2356
2357 # bitstream_filters
2358 aac_adtstoasc_bsf_select="adts_header"
2359 h264_metadata_bsf_select="cbs_h264"
2360 h264_redundant_pps_bsf_select="cbs_h264"
2361 hevc_metadata_bsf_select="cbs_h265"
2362 mjpeg2jpeg_bsf_select="jpegtables"
2363 mpeg2_metadata_bsf_select="cbs_mpeg2"
2364 trace_headers_bsf_select="cbs_h264 cbs_h265 cbs_mpeg2"
2365
2366 # external libraries
2367 avisynth_deps="LoadLibrary"
2368 avxsynth_deps="libdl"
2369 avisynth_demuxer_deps_any="avisynth avxsynth"
2370 avisynth_demuxer_select="riffdec"
2371 libaom_av1_decoder_deps="libaom"
2372 libaom_av1_encoder_deps="libaom"
2373 libdcadec_decoder_deps="libdcadec"
2374 libfaac_encoder_deps="libfaac"
2375 libfaac_encoder_select="audio_frame_queue"
2376 libfdk_aac_decoder_deps="libfdk_aac"
2377 libfdk_aac_encoder_deps="libfdk_aac"
2378 libfdk_aac_encoder_select="audio_frame_queue"
2379 libgsm_decoder_deps="libgsm"
2380 libgsm_encoder_deps="libgsm"
2381 libgsm_ms_decoder_deps="libgsm"
2382 libgsm_ms_encoder_deps="libgsm"
2383 libilbc_decoder_deps="libilbc"
2384 libilbc_encoder_deps="libilbc"
2385 libkvazaar_encoder_deps="libkvazaar"
2386 libmp3lame_encoder_deps="libmp3lame"
2387 libmp3lame_encoder_select="audio_frame_queue mpegaudioheader"
2388 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2389 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2390 libopencore_amrnb_encoder_select="audio_frame_queue"
2391 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2392 libopenh264_decoder_deps="libopenh264"
2393 libopenh264_decoder_select="h264_mp4toannexb_bsf"
2394 libopenh264_encoder_deps="libopenh264"
2395 libopenjpeg_decoder_deps="libopenjpeg"
2396 libopenjpeg_encoder_deps="libopenjpeg"
2397 libopus_decoder_deps="libopus"
2398 libopus_encoder_deps="libopus"
2399 libopus_encoder_select="audio_frame_queue"
2400 libschroedinger_decoder_deps="libschroedinger"
2401 libschroedinger_encoder_deps="libschroedinger"
2402 libspeex_decoder_deps="libspeex"
2403 libspeex_encoder_deps="libspeex"
2404 libspeex_encoder_select="audio_frame_queue"
2405 libtheora_encoder_deps="libtheora"
2406 libtwolame_encoder_deps="libtwolame"
2407 libvo_aacenc_encoder_deps="libvo_aacenc"
2408 libvo_aacenc_encoder_select="audio_frame_queue"
2409 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2410 libvorbis_encoder_deps="libvorbis"
2411 libvorbis_encoder_select="audio_frame_queue"
2412 libvpx_vp8_decoder_deps="libvpx"
2413 libvpx_vp8_encoder_deps="libvpx"
2414 libvpx_vp9_decoder_deps="libvpx"
2415 libvpx_vp9_encoder_deps="libvpx"
2416 libwavpack_encoder_deps="libwavpack"
2417 libwavpack_encoder_select="audio_frame_queue"
2418 libwebp_encoder_deps="libwebp"
2419 libx262_encoder_deps="libx262"
2420 libx264_encoder_deps="libx264"
2421 libx265_encoder_deps="libx265"
2422 libxavs_encoder_deps="libxavs"
2423 libxvid_encoder_deps="libxvid mkstemp"
2424
2425 # demuxers / muxers
2426 ac3_demuxer_select="ac3_parser"
2427 asf_demuxer_select="riffdec"
2428 asf_muxer_select="riffenc"
2429 asf_stream_muxer_select="asf_muxer"
2430 avi_demuxer_select="iso_media riffdec"
2431 avi_muxer_select="riffenc"
2432 caf_demuxer_select="iso_media riffdec"
2433 dash_muxer_select="mp4_muxer"
2434 dirac_demuxer_select="dirac_parser"
2435 dv_demuxer_select="dvprofile"
2436 dv_muxer_select="dvprofile"
2437 dxa_demuxer_select="riffdec"
2438 eac3_demuxer_select="ac3_parser"
2439 f4v_muxer_select="mov_muxer"
2440 flac_demuxer_select="flac_parser"
2441 hds_muxer_select="flv_muxer"
2442 hls_muxer_select="mpegts_muxer"
2443 ipod_muxer_select="mov_muxer"
2444 ismv_muxer_select="mov_muxer"
2445 matroska_audio_muxer_select="matroska_muxer"
2446 matroska_demuxer_select="iso_media riffdec"
2447 matroska_demuxer_suggest="bzlib lzo zlib"
2448 matroska_muxer_select="iso_media riffenc"
2449 mmf_muxer_select="riffenc"
2450 mov_demuxer_select="iso_media riffdec"
2451 mov_demuxer_suggest="zlib"
2452 mov_muxer_select="iso_media riffenc rtpenc_chain"
2453 mp3_demuxer_select="mpegaudio_parser"
2454 mp3_muxer_select="mpegaudioheader"
2455 mp4_muxer_select="mov_muxer"
2456 mpegts_demuxer_select="iso_media"
2457 mpegts_muxer_select="adts_muxer latm_muxer"
2458 mpegtsraw_demuxer_select="mpegts_demuxer"
2459 mxf_d10_muxer_select="mxf_muxer"
2460 nut_muxer_select="riffenc"
2461 nuv_demuxer_select="riffdec"
2462 oga_muxer_select="ogg_muxer"
2463 ogg_demuxer_select="dirac_parse"
2464 opus_muxer_select="ogg_muxer"
2465 psp_muxer_select="mov_muxer"
2466 rtp_demuxer_select="sdp_demuxer"
2467 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2468 rtsp_demuxer_select="http_protocol rtpdec"
2469 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2470 sap_demuxer_select="sdp_demuxer"
2471 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2472 sdp_demuxer_select="rtpdec"
2473 smoothstreaming_muxer_select="ismv_muxer"
2474 spdif_demuxer_select="adts_header"
2475 spdif_muxer_select="adts_header"
2476 spx_muxer_select="ogg_muxer"
2477 swf_demuxer_suggest="zlib"
2478 tak_demuxer_select="tak_parser"
2479 tg2_muxer_select="mov_muxer"
2480 tgp_muxer_select="mov_muxer"
2481 w64_demuxer_select="wav_demuxer"
2482 wav_demuxer_select="riffdec"
2483 wav_muxer_select="riffenc"
2484 webm_muxer_select="iso_media riffenc"
2485 wtv_demuxer_select="mpegts_demuxer riffdec"
2486 xmv_demuxer_select="riffdec"
2487 xwma_demuxer_select="riffdec"
2488
2489 # indevs
2490 alsa_indev_deps="alsa"
2491 avfoundation_indev_deps="AVFoundation_AVFoundation_h objc_arc pthreads"
2492 avfoundation_indev_extralibs="-framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia"
2493 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2494 fbdev_indev_deps="linux_fb_h"
2495 jack_indev_deps="libjack"
2496 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
2497 libcdio_indev_deps="libcdio"
2498 libdc1394_indev_deps="libdc1394"
2499 oss_indev_deps_any="sys_soundcard_h"
2500 pulse_indev_deps="libpulse"
2501 sndio_indev_deps="sndio"
2502 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2503 vfwcap_indev_deps="vfw32 vfwcap_defines"
2504 xcbgrab_indev_deps="libxcb libxcb_shape"
2505 xcbgrab_indev_suggest="libxcb_shm libxcb_xfixes"
2506
2507 # protocols
2508 ffrtmpcrypt_protocol_conflict="librtmp_protocol"
2509 ffrtmpcrypt_protocol_deps_any="gmp openssl"
2510 ffrtmpcrypt_protocol_select="tcp_protocol"
2511 ffrtmphttp_protocol_conflict="librtmp_protocol"
2512 ffrtmphttp_protocol_select="http_protocol"
2513 gopher_protocol_select="network"
2514 http_protocol_select="tcp_protocol"
2515 http_protocol_suggest="zlib"
2516 httpproxy_protocol_select="tcp_protocol"
2517 httpproxy_protocol_suggest="zlib"
2518 https_protocol_select="tls_protocol"
2519 https_protocol_suggest="zlib"
2520 icecast_protocol_select="http_protocol"
2521 librtmp_protocol_deps="librtmp"
2522 librtmpe_protocol_deps="librtmp"
2523 librtmps_protocol_deps="librtmp"
2524 librtmpt_protocol_deps="librtmp"
2525 librtmpte_protocol_deps="librtmp"
2526 mmsh_protocol_select="http_protocol"
2527 mmst_protocol_select="network"
2528 rtmp_protocol_conflict="librtmp_protocol"
2529 rtmp_protocol_select="tcp_protocol"
2530 rtmp_protocol_suggest="zlib"
2531 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2532 rtmpe_protocol_suggest="zlib"
2533 rtmps_protocol_conflict="librtmp_protocol"
2534 rtmps_protocol_select="tls_protocol"
2535 rtmps_protocol_suggest="zlib"
2536 rtmpt_protocol_select="ffrtmphttp_protocol"
2537 rtmpt_protocol_suggest="zlib"
2538 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2539 rtmpte_protocol_suggest="zlib"
2540 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2541 rtmpts_protocol_suggest="zlib"
2542 rtp_protocol_select="udp_protocol"
2543 sctp_protocol_deps="struct_sctp_event_subscribe"
2544 sctp_protocol_select="network"
2545 srtp_protocol_select="rtp_protocol srtp"
2546 tcp_protocol_select="network"
2547 tls_protocol_deps_any="gnutls openssl"
2548 tls_protocol_select="tcp_protocol"
2549 udp_protocol_select="network"
2550 unix_protocol_deps="sys_un_h"
2551 unix_protocol_select="network"
2552
2553 # filters
2554 asyncts_filter_deps="avresample"
2555 blackframe_filter_deps="gpl"
2556 boxblur_filter_deps="gpl"
2557 bs2b_filter_deps="libbs2b"
2558 cropdetect_filter_deps="gpl"
2559 deinterlace_qsv_filter_deps="libmfx"
2560 deinterlace_vaapi_filter_deps="vaapi"
2561 delogo_filter_deps="gpl"
2562 drawtext_filter_deps="libfreetype"
2563 drawtext_filter_suggest="libfontconfig"
2564 frei0r_filter_deps="frei0r libdl"
2565 frei0r_src_filter_deps="frei0r libdl"
2566 hdcd_filter_deps="libhdcd"
2567 hqdn3d_filter_deps="gpl"
2568 interlace_filter_deps="gpl"
2569 movie_filter_deps="avcodec avformat"
2570 ocv_filter_deps="libopencv"
2571 overlay_qsv_filter_deps="libmfx"
2572 overlay_qsv_filter_select="qsvvpp"
2573 resample_filter_deps="avresample"
2574 scale_filter_deps="swscale"
2575 scale_qsv_filter_deps="libmfx"
2576 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2577 vpp_qsv_filter_deps="libmfx"
2578 vpp_qsv_filter_select="qsvvpp"
2579
2580 # examples
2581 decode_audio_example_deps="avcodec avutil"
2582 decode_video_example_deps="avcodec avutil"
2583 encode_audio_example_deps="avcodec avutil"
2584 encode_video_example_deps="avcodec avutil"
2585 filter_audio_example_deps="avfilter avutil"
2586 metadata_example_deps="avformat avutil"
2587 output_example_deps="avcodec avformat avresample avutil swscale"
2588 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder"
2589 transcode_aac_example_deps="avcodec avformat avresample"
2590
2591 # EXTRALIBS_LIST
2592 cpu_init_extralibs="pthreads_extralibs"
2593 cws2fws_extralibs="zlib_extralibs"
2594
2595 # libraries, in linking order
2596 avcodec_deps="avutil"
2597 avcodec_select="null_bsf"
2598 avdevice_deps="avformat avcodec avutil"
2599 avfilter_deps="avutil"
2600 avformat_deps="avcodec avutil"
2601 avformat_suggest="network"
2602 avresample_deps="avutil"
2603 swscale_deps="avutil"
2604
2605 avcodec_extralibs="pthreads_extralibs libm_extralibs"
2606 avdevice_extralibs="libm_extralibs"
2607 avformat_extralibs="libm_extralibs"
2608 avfilter_extralibs="pthreads_extralibs libm_extralibs"
2609 avresample_extralibs="libm_extralibs"
2610 avutil_extralibs="clock_gettime_extralibs cuda_extralibs cuvid_extralibs d3d11va_extralibs libm_extralibs libmfx_extralibs nanosleep_extralibs pthreads_extralibs user32_extralibs vaapi_extralibs vaapi_drm_extralibs vaapi_x11_extralibs vdpau_x11_extralibs wincrypt_extralibs"
2611 swscale_extralibs="libm_extralibs"
2612
2613 # programs
2614 avconv_deps="avcodec avfilter avformat avresample swscale"
2615 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2616                fps_filter null_filter resample_filter scale_filter
2617                trim_filter"
2618 avconv_suggest="psapi shell32"
2619 avplay_deps="avcodec avfilter avformat avresample sdl"
2620 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2621 avplay_suggest="shell32"
2622 avprobe_deps="avcodec avformat"
2623 avprobe_suggest="shell32"
2624
2625 # documentation
2626 pod2man_deps="doc"
2627 texi2html_deps="doc"
2628
2629 # default parameters
2630
2631 logfile="avbuild/config.log"
2632
2633 # installation paths
2634 prefix_default="/usr/local"
2635 bindir_default='${prefix}/bin'
2636 datadir_default='${prefix}/share/avconv'
2637 docdir_default='${prefix}/share/doc/libav'
2638 incdir_default='${prefix}/include'
2639 libdir_default='${prefix}/lib'
2640 mandir_default='${prefix}/share/man'
2641 shlibdir_default="$libdir_default"
2642
2643 # toolchain
2644 ar_default="ar"
2645 cc_default="gcc"
2646 host_cc_default="gcc"
2647 x86asmexe_default="nasm"
2648 ln_s="ln -s -f"
2649 nm_default="nm -g"
2650 pkg_config_default=pkg-config
2651 ranlib="ranlib"
2652 strip="strip"
2653 version_script='--version-script'
2654 objformat="elf32"
2655
2656 # machine
2657 arch_default=$(uname -m)
2658 cpu="generic"
2659 intrinsics="none"
2660
2661 # OS
2662 target_os_default=$(tolower $(uname -s))
2663 host_os=$target_os_default
2664
2665 # configurable options
2666 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2667
2668 enable asm
2669 enable debug
2670 enable doc
2671 enable faan faandct faanidct
2672 enable optimizations
2673 enable safe_bitstream_reader
2674 enable static
2675 enable swscale_alpha
2676 enable valgrind_backtrace
2677
2678 # By default, enable only those hwaccels that have no external dependencies.
2679 enable d3d11va dxva2 vda vdpau
2680
2681 # internal components are enabled by default
2682 enable $EXTRALIBS_LIST
2683
2684 # Avoid external, non-system, libraries getting enabled by dependency resolution
2685 disable $EXTERNAL_LIBRARY_LIST
2686
2687 # build settings
2688 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2689 LIBPREF="lib"
2690 LIBSUF=".a"
2691 LIBNAME='$(LIBPREF)$(NAME)$(LIBSUF)'
2692 SLIBPREF="lib"
2693 SLIBSUF=".so"
2694 SLIBNAME='$(SLIBPREF)$(NAME)$(SLIBSUF)'
2695 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2696 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2697 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2698 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2699 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2700 VERSION_SCRIPT_POSTPROCESS_CMD="cat"
2701
2702 asflags_filter=echo
2703 cflags_filter=echo
2704 ldflags_filter=echo
2705
2706 AS_C='-c'
2707 AS_O='-o $@'
2708 CC_C='-c'
2709 CC_E='-E -o $@'
2710 CC_O='-o $@'
2711 OBJCC_C='-c'
2712 OBJCC_E='-E -o $@'
2713 OBJCC_O='-o $@'
2714 X86ASM_O='-o $@'
2715 LD_O='-o $@'
2716 LD_LIB='-l%'
2717 LD_PATH='-L'
2718 HOSTCC_C='-c'
2719 HOSTCC_E='-E -o $@'
2720 HOSTCC_O='-o $@'
2721 HOSTLD_O='-o $@'
2722
2723 host_extralibs='-lm'
2724 host_cflags_filter=echo
2725 host_ldflags_filter=echo
2726
2727 target_path='$(CURDIR)'
2728
2729 # since the object filename is not given with the -MM flag, the compiler
2730 # is only able to print the basename, and we must add the path ourselves
2731 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2732 DEPFLAGS='-MM'
2733
2734 mkdir -p avbuild
2735
2736 # find source path
2737 if test -f configure; then
2738     source_path=.
2739 else
2740     source_path=$(cd $(dirname "$0"); pwd)
2741     echo "$source_path" | grep -q '[[:blank:]]' &&
2742         die "Out of tree builds are impossible with whitespace in source path."
2743     test -e "$source_path/config.h" &&
2744         die "Out of tree builds are impossible with config.h in source dir."
2745 fi
2746
2747 for v in "$@"; do
2748     r=${v#*=}
2749     l=${v%"$r"}
2750     r=$(sh_quote "$r")
2751     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2752 done
2753
2754 find_things(){
2755     thing=$1
2756     pattern=$2
2757     file=$source_path/$3
2758     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2759 }
2760
2761 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2762 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2763 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2764 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2765 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2766 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2767 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2768
2769 find_things_extern(){
2770     thing=$1
2771     pattern=$2
2772     file=$source_path/$3
2773     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2774 }
2775
2776 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2777 HWACCEL_LIST=$(find_things_extern hwaccel AVHWAccel libavcodec/hwaccels.h)
2778 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2779
2780 AVCODEC_COMPONENTS_LIST="
2781     $BSF_LIST
2782     $DECODER_LIST
2783     $ENCODER_LIST
2784     $HWACCEL_LIST
2785     $PARSER_LIST
2786 "
2787
2788 AVDEVICE_COMPONENTS_LIST="
2789     $INDEV_LIST
2790 "
2791
2792 AVFILTER_COMPONENTS_LIST="
2793     $FILTER_LIST
2794 "
2795
2796 AVFORMAT_COMPONENTS_LIST="
2797     $DEMUXER_LIST
2798     $MUXER_LIST
2799     $PROTOCOL_LIST
2800 "
2801
2802 ALL_COMPONENTS="
2803     $AVCODEC_COMPONENTS_LIST
2804     $AVDEVICE_COMPONENTS_LIST
2805     $AVFILTER_COMPONENTS_LIST
2806     $AVFORMAT_COMPONENTS_LIST
2807 "
2808
2809 for n in $COMPONENT_LIST; do
2810     v=$(toupper ${n%s})_LIST
2811     eval enable \$$v
2812     eval ${n}_if_any="\$$v"
2813 done
2814
2815 enable $ARCH_EXT_LIST
2816
2817 die_unknown(){
2818     echo "Unknown option \"$1\"."
2819     echo "See $0 --help for available options."
2820     exit 1
2821 }
2822
2823 print_3_columns() {
2824     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2825 }
2826
2827 show_list() {
2828     suffix=_$1
2829     shift
2830     echo $* | sed s/$suffix//g | print_3_columns
2831     exit 0
2832 }
2833
2834 for opt do
2835     optval="${opt#*=}"
2836     case "$opt" in
2837         --extra-ldflags=*)
2838             add_ldflags $optval
2839         ;;
2840         --extra-ldexeflags=*)
2841             add_ldexeflags $optval
2842         ;;
2843         --extra-ldsoflags=*)
2844             add_ldsoflags $optval
2845         ;;
2846         --extra-libs=*)
2847             add_extralibs $optval
2848         ;;
2849         --disable-devices)
2850             disable $INDEV_LIST
2851         ;;
2852         --enable-debug=*)
2853             debuglevel="$optval"
2854         ;;
2855         --disable-programs)
2856             disable $PROGRAM_LIST
2857         ;;
2858         --disable-everything)
2859             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2860         ;;
2861         --disable-all)
2862             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2863             disable $LIBRARY_LIST $PROGRAM_LIST doc
2864         ;;
2865         --enable-*=*|--disable-*=*)
2866             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2867             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2868             eval list=\$$(toupper $thing)_LIST
2869             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2870             $action $(filter "$name" $list)
2871         ;;
2872         --enable-yasm|--disable-yasm)
2873             warn "The ${opt} option is only provided for compatibility and will be\n"\
2874                  "removed in the future. Use --enable-x86asm / --disable-x86asm instead."
2875             test $opt = --enable-yasm && x86asm=yes || x86asm=no
2876         ;;
2877         --enable-?*|--disable-?*)
2878             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2879             if is_in $option $COMPONENT_LIST; then
2880                 test $action = disable && action=unset
2881                 eval $action \$$(toupper ${option%s})_LIST
2882             elif is_in $option $CMDLINE_SELECT; then
2883                 $action $option
2884             else
2885                 die_unknown $opt
2886             fi
2887         ;;
2888         --list-*)
2889             NAME="${opt#--list-}"
2890             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2891             NAME=${NAME%s}
2892             eval show_list $NAME \$$(toupper $NAME)_LIST
2893         ;;
2894         --help|-h) show_help
2895         ;;
2896         --quiet|-q) quiet=yes
2897         ;;
2898         *)
2899             optname="${opt%%=*}"
2900             optname="${optname#--}"
2901             optname=$(echo "$optname" | sed 's/-/_/g')
2902             if is_in $optname $CMDLINE_SET; then
2903                 eval $optname='$optval'
2904             elif is_in $optname $CMDLINE_APPEND; then
2905                 append $optname "$optval"
2906             else
2907                 die_unknown $opt
2908             fi
2909         ;;
2910     esac
2911 done
2912
2913 for e in $env; do
2914     eval "export $e"
2915 done
2916
2917 disabled logging && logfile=/dev/null
2918
2919 # command line configuration sanity checks
2920
2921 # we need to build at least one lib type
2922 if ! enabled_any static shared; then
2923     cat <<EOF
2924 At least one library type must be built.
2925 Specify --enable-static to build the static libraries or --enable-shared to
2926 build the shared libraries as well. To only build the shared libraries specify
2927 --disable-static in addition to --enable-shared.
2928 EOF
2929     exit 1
2930 fi
2931
2932 # Die early if licensing-related configure options are incompatible.
2933 die_license_disabled() {
2934     enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
2935 }
2936
2937 map "die_license_disabled gpl"      $EXTERNAL_LIBRARY_GPL_LIST
2938 map "die_license_disabled nonfree"  $EXTERNAL_LIBRARY_NONFREE_LIST $HWACCEL_LIBRARY_NONFREE_LIST
2939 map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST
2940
2941 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
2942
2943 if enabled nonfree; then
2944     license="nonfree and unredistributable"
2945 elif enabled gplv3; then
2946     license="GPL version 3 or later"
2947 elif enabled lgplv3; then
2948     license="LGPL version 3 or later"
2949 elif enabled gpl; then
2950     license="GPL version 2 or later"
2951 else
2952     license="LGPL version 2.1 or later"
2953 fi
2954
2955 enabled_all gnutls openssl &&
2956     die "GnuTLS and OpenSSL must not be enabled at the same time."
2957
2958 # Disable all the library-specific components if the library itself
2959 # is disabled, see AVCODEC_LIST and following _LIST variables.
2960
2961 disable_components(){
2962     disabled ${1} && disable $(
2963         eval components="\$$(toupper ${1})_COMPONENTS"
2964         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2965     )
2966 }
2967
2968 map 'disable_components $v' $LIBRARY_LIST
2969
2970 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2971 set >> $logfile
2972
2973 case "$toolchain" in
2974     *-asan)
2975         cc_default="${toolchain%-asan}"
2976         add_cflags  -fsanitize=address
2977         add_ldflags -fsanitize=address
2978     ;;
2979     *-msan)
2980         cc_default="${toolchain%-msan}"
2981         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2982         add_ldflags -fsanitize=memory
2983     ;;
2984     *-tsan)
2985         cc_default="${toolchain%-tsan}"
2986         add_cflags  -fsanitize=thread -fPIE
2987         add_ldflags -fsanitize=thread -pie
2988         case "$toolchain" in
2989             gcc-tsan)
2990                 add_cflags  -fPIC
2991                 add_ldflags -fPIC
2992                 ;;
2993         esac
2994     ;;
2995     *-usan)
2996         cc_default="${toolchain%-usan}"
2997         add_cflags  -fsanitize=undefined
2998         add_ldflags -fsanitize=undefined
2999         case "$toolchain" in
3000             clang-usan)
3001                 add_cflags -O1
3002                 ;;
3003         esac
3004     ;;
3005     valgrind-*)
3006         target_exec_default="valgrind"
3007         case "$toolchain" in
3008             valgrind-massif)
3009                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
3010                 ;;
3011             valgrind-memcheck)
3012                 target_exec_args="--track-origins=yes --leak-check=full"
3013                 ;;
3014         esac
3015     ;;
3016     msvc)
3017         # Check whether the current MSVC version needs the C99 converter.
3018         # From MSVC 2013 (compiler major version 18) onwards, it does actually
3019         # support enough of C99 to build libav. Default to the new
3020         # behaviour if the regexp was unable to match anything, since this
3021         # successfully parses the version number of existing supported
3022         # versions that require the converter (MSVC 2010 and 2012).
3023         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
3024         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
3025             cc_default="cl"
3026         else
3027             cc_default="c99wrap cl"
3028         fi
3029         ld_default="$source_path/compat/windows/mslink"
3030         nm_default="dumpbin -symbols"
3031         ar_default="lib"
3032         case "$arch" in
3033         aarch64|arm64)
3034             as_default="armasm64"
3035             ;;
3036         arm*)
3037             as_default="armasm"
3038             ;;
3039         esac
3040         target_os_default="win32"
3041         # Use a relative path for TMPDIR. This makes sure all the
3042         # ffconf temp files are written with a relative path, avoiding
3043         # issues with msys/win32 path conversion for MSVC parameters
3044         # such as -Fo<file> or -out:<file>.
3045         TMPDIR=.
3046     ;;
3047     icl)
3048         cc_default="icl"
3049         ld_default="xilink"
3050         nm_default="dumpbin -symbols"
3051         ar_default="xilib"
3052         target_os_default="win32"
3053         TMPDIR=.
3054     ;;
3055     gcov)
3056         add_cflags  -fprofile-arcs -ftest-coverage
3057         add_ldflags -fprofile-arcs -ftest-coverage
3058     ;;
3059     llvm-cov)
3060         add_cflags -fprofile-arcs -ftest-coverage
3061         add_ldflags --coverage
3062     ;;
3063     hardened)
3064         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
3065         add_cflags   -fno-strict-overflow -fstack-protector-all
3066         add_ldflags  -Wl,-z,relro -Wl,-z,now
3067     ;;
3068     ?*)
3069         die "Unknown toolchain $toolchain"
3070     ;;
3071 esac
3072
3073 if test -n "$cross_prefix"; then
3074     test -n "$arch" && test -n "$target_os" ||
3075         die "Must specify target arch (--arch) and OS (--target-os) when cross-compiling"
3076     enable cross_compile
3077 fi
3078
3079 ar_default="${cross_prefix}${ar_default}"
3080 cc_default="${cross_prefix}${cc_default}"
3081 objcc_default="${cross_prefix}${objcc_default}"
3082 x86asmexe_default="${cross_prefix}${x86asmexe_default}"
3083 nm_default="${cross_prefix}${nm_default}"
3084 pkg_config_default="${cross_prefix}${pkg_config_default}"
3085 ranlib="${cross_prefix}${ranlib}"
3086 strip="${cross_prefix}${strip}"
3087
3088 sysinclude_default="${sysroot}/usr/include"
3089
3090 set_default arch cc pkg_config sysinclude target_exec target_os x86asmexe
3091 enabled cross_compile || host_cc_default=$cc
3092 set_default host_cc
3093
3094 if ! $pkg_config --version >/dev/null 2>&1; then
3095     warn "$pkg_config not found, library detection may fail."
3096     pkg_config=false
3097 fi
3098
3099 exesuf() {
3100     case $1 in
3101         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
3102     esac
3103 }
3104
3105 EXESUF=$(exesuf $target_os)
3106 HOSTEXESUF=$(exesuf $host_os)
3107
3108 # set temporary file name
3109 : ${TMPDIR:=$TEMPDIR}
3110 : ${TMPDIR:=$TMP}
3111 : ${TMPDIR:=/tmp}
3112
3113 if ! test_cmd mktemp -u XXXXXX; then
3114     # simple replacement for missing mktemp
3115     # NOT SAFE FOR GENERAL USE
3116     mktemp(){
3117         tmpname="${2%%XXX*}.${HOSTNAME}.${UID}.$$"
3118         echo "$tmpname"
3119         mkdir "$tmpname"
3120     }
3121 fi
3122
3123 AVTMPDIR=$(mktemp -d "${TMPDIR}/avconf.XXXXXXXX" 2> /dev/null) ||
3124     die "Unable to create temporary directory in $TMPDIR."
3125
3126 tmpfile(){
3127     tmp="${AVTMPDIR}/test"$2
3128     (set -C; exec > $tmp) 2> /dev/null ||
3129         die "Unable to create temporary file in $AVTMPDIR."
3130     eval $1=$tmp
3131 }
3132
3133 trap 'rm -rf -- "$AVTMPDIR"' EXIT
3134 trap 'exit 2' INT
3135
3136 tmpfile TMPASM .asm
3137 tmpfile TMPC   .c
3138 tmpfile TMPE   $EXESUF
3139 tmpfile TMPH   .h
3140 tmpfile TMPO   .o
3141 tmpfile TMPS   .S
3142 tmpfile TMPSH  .sh
3143 tmpfile TMPV   .ver
3144
3145 unset -f mktemp
3146
3147 chmod +x $TMPE
3148
3149 # make sure we can execute files in $TMPDIR
3150 cat > $TMPSH 2>> $logfile <<EOF
3151 #! /bin/sh
3152 EOF
3153 chmod +x $TMPSH >> $logfile 2>&1
3154 if ! $TMPSH >> $logfile 2>&1; then
3155     cat <<EOF
3156 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
3157 variable to another directory and make sure that it is not mounted noexec.
3158 EOF
3159     die "Sanity test failed."
3160 fi
3161
3162 armasm_flags(){
3163     for flag; do
3164         case $flag in
3165             # Filter out MSVC cl.exe options from cflags that shouldn't
3166             # be passed to gas-preprocessor
3167             -M[TD]*)                                            ;;
3168             *)                  echo $flag                      ;;
3169         esac
3170    done
3171 }
3172
3173 cparser_flags(){
3174     for flag; do
3175         case $flag in
3176             -Wno-switch)             echo -Wno-switch-enum ;;
3177             -Wno-format-zero-length) ;;
3178             -Wdisabled-optimization) ;;
3179             -Wno-pointer-sign)       echo -Wno-other ;;
3180             *)                       echo $flag ;;
3181         esac
3182     done
3183 }
3184
3185 msvc_common_flags(){
3186     for flag; do
3187         case $flag in
3188             # In addition to specifying certain flags under the compiler
3189             # specific filters, they must be specified here as well or else the
3190             # generic catch all at the bottom will print the original flag.
3191             -Wall)                ;;
3192             -Wextra)              ;;
3193             -std=c99)             ;;
3194             # Common flags
3195             -fomit-frame-pointer) ;;
3196             -g)                   echo -Z7 ;;
3197             -fno-math-errno)      ;;
3198             -fno-common)          ;;
3199             -fno-signed-zeros)    ;;
3200             -fPIC)                ;;
3201             -mthumb)              ;;
3202             -march=*)             ;;
3203             -lz)                  echo zlib.lib ;;
3204             -lx264)               echo libx264.lib ;;
3205             -l*)                  echo ${flag#-l}.lib ;;
3206             -L*)                  echo -libpath:${flag#-L} ;;
3207             *)                    echo $flag ;;
3208         esac
3209     done
3210 }
3211
3212 msvc_flags(){
3213     msvc_common_flags "$@"
3214     for flag; do
3215         case $flag in
3216             -Wall)                echo -W3 -wd4018 -wd4146 -wd4244 -wd4305     \
3217                                        -wd4554 ;;
3218             -Wextra)              echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3219                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3220                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3221                                        -wd4273 -wd4554 -wd4701 -wd4703 ;;
3222         esac
3223     done
3224 }
3225
3226 icl_flags(){
3227     msvc_common_flags "$@"
3228     for flag; do
3229         case $flag in
3230             # Despite what Intel's documentation says -Wall, which is supported
3231             # on Windows, does enable remarks so disable them here.
3232             -Wall)                echo $flag -Qdiag-disable:remark ;;
3233             -std=c99)             echo -Qstd=c99 ;;
3234         esac
3235     done
3236 }
3237
3238 suncc_flags(){
3239     for flag; do
3240         case $flag in
3241             -march=*|-mcpu=*)
3242                 case "${flag#*=}" in
3243                     native)                   echo -xtarget=native       ;;
3244                     v9|niagara)               echo -xarch=sparc          ;;
3245                     ultrasparc)               echo -xarch=sparcvis       ;;
3246                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3247                     i586|pentium)             echo -xchip=pentium        ;;
3248                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3249                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3250                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3251                     pentium4*)          echo -xtarget=pentium4           ;;
3252                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3253                     *-sse3)             echo -xarch=sse3                 ;;
3254                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3255                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3256                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3257                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3258                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3259                     k8|opteron|athlon64|athlon-fx)
3260                                                echo -xarch=sse2a         ;;
3261                     athlon*)                   echo -xarch=pentium_proa  ;;
3262                 esac
3263                 ;;
3264             -std=c99)             echo -xc99              ;;
3265             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3266             -fPIC)                echo -KPIC -xcode=pic32 ;;
3267             -W*,*)                echo $flag              ;;
3268             -f*-*|-W*|-mimpure-text)                      ;;
3269             -shared)              echo -G                 ;;
3270             *)                    echo $flag              ;;
3271         esac
3272     done
3273 }
3274
3275 probe_cc(){
3276     pfx=$1
3277     _cc=$2
3278
3279     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3280     unset _ld_o _ldflags _ld_lib _ld_path
3281     unset _depflags _DEPCMD _DEPFLAGS
3282     _flags_filter=echo
3283
3284     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3285         _type=llvm_gcc
3286         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3287         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3288         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3289         _cflags_speed='-O3'
3290         _cflags_size='-Os'
3291     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3292         _type=gcc
3293         gcc_version=$($_cc --version | head -n1)
3294         gcc_basever=$($_cc -dumpversion)
3295         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3296         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3297         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3298         if ! $_cc -dumpversion | grep -q '^2\.'; then
3299             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3300         fi
3301         _cflags_speed='-O3'
3302         _cflags_size='-Os'
3303     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3304         _type=icc
3305         _ident=$($_cc --version | head -n1)
3306         _depflags='-MMD'
3307         _cflags_speed='-O3'
3308         _cflags_size='-Os'
3309         _cflags_noopt='-O1'
3310     elif $_cc -v 2>&1 | grep -q xlc; then
3311         _type=xlc
3312         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3313         _cflags_speed='-O5'
3314         _cflags_size='-O5 -qcompact'
3315     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3316         test -d "$sysroot" || die "No valid sysroot specified."
3317         _type=armcc
3318         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3319         armcc_conf="$PWD/armcc.conf"
3320         $_cc --arm_linux_configure                 \
3321              --arm_linux_config_file="$armcc_conf" \
3322              --configure_sysroot="$sysroot"        \
3323              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3324              die "Error creating armcc configuration file."
3325         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3326         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3327         as_default="${cross_prefix}gcc"
3328         _depflags='-MMD'
3329         _cflags_speed='-O3'
3330         _cflags_size='-Os'
3331     elif $_cc -v 2>&1 | grep -q clang; then
3332         _type=clang
3333         _ident=$($_cc --version 2>/dev/null | head -n1)
3334         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3335         _cflags_speed='-O3'
3336         _cflags_size='-Os'
3337     elif $_cc -V 2>&1 | grep -q Sun; then
3338         _type=suncc
3339         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3340         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3341         _DEPFLAGS='-xM1 -xc99'
3342         _ldflags='-std=c99'
3343         _cflags_speed='-O5'
3344         _cflags_size='-O5 -xspace'
3345         _flags_filter=suncc_flags
3346     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3347         _type=pathscale
3348         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3349         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3350         _cflags_speed='-O2'
3351         _cflags_size='-Os'
3352         _flags_filter='filter_out -Wdisabled-optimization'
3353     elif $_cc -v 2>&1 | grep -q Open64; then
3354         _type=open64
3355         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3356         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3357         _cflags_speed='-O2'
3358         _cflags_size='-Os'
3359         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3360     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3361         _type=armasm
3362         _ident=$($_cc | head -n1)
3363         # 4509: "This form of conditional instruction is deprecated"
3364         _flags="-nologo -ignore 4509"
3365         _flags_filter=armasm_flags
3366     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3367         _type=msvc
3368         _ident=$($_cc 2>&1 | head -n1)
3369         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3370         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3371         _cflags_speed="-O2"
3372         _cflags_size="-O1"
3373         _cflags_noopt="-O1"
3374         if $_cc -nologo- 2>&1 | grep -q Linker; then
3375             _ld_o='-out:$@'
3376         else
3377             _ld_o='-Fe$@'
3378         fi
3379         _cc_o='-Fo$@'
3380         _cc_e='-P -Fi$@'
3381         _flags_filter=msvc_flags
3382         _ld_lib='lib%.a'
3383         _ld_path='-libpath:'
3384         _flags='-nologo'
3385     elif $_cc 2>&1 | grep -q Intel; then
3386         _type=icl
3387         _ident=$($_cc 2>&1 | head -n1)
3388         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3389         # Not only is O3 broken on 13.x+ but it is slower on all previous
3390         # versions (tested) as well.
3391         _cflags_speed="-O2"
3392         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3393         if $_cc 2>&1 | grep -q Linker; then
3394             _ld_o='-out:$@'
3395         else
3396             _ld_o='-Fe$@'
3397         fi
3398         _cc_o='-Fo$@'
3399         _cc_e='-P'
3400         _flags_filter=icl_flags
3401         _ld_lib='lib%.a'
3402         _ld_path='-libpath:'
3403         # -Qdiag-error to make icl error when seeing certain unknown arguments
3404         _flags='-nologo -Qdiag-error:4044,10157'
3405         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3406         # with MSVC which enables it by default.
3407         _cflags='-Qms0 -Qvec- -Qsimd- -GS'
3408     elif $_cc -? 2>/dev/null | grep -q 'LLVM.*Linker'; then
3409         # lld can emulate multiple different linkers; in ms link.exe mode,
3410         # the -? parameter gives the help output which contains an identifyable
3411         # string, while it gives an error in other modes.
3412         _type=lld-link
3413         # The link.exe mode doesn't have a switch for getting the version,
3414         # but we can force it back to gnu mode and get the version from there.
3415         _ident=$($_cc -flavor gnu --version 2>/dev/null)
3416         _ld_o='-out:$@'
3417         _flags_filter=msvc_flags
3418         _ld_lib='lib%.a'
3419         _ld_path='-libpath:'
3420     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3421         _type=cparser
3422         _ident=$($_cc --version | head -n1)
3423         _depflags='-MMD'
3424         _cflags_speed='-O4'
3425         _cflags_size='-O2'
3426         _flags_filter=cparser_flags
3427     fi
3428
3429     eval ${pfx}_type=\$_type
3430     eval ${pfx}_ident=\$_ident
3431 }
3432
3433 set_ccvars(){
3434     eval ${1}_C=\${_cc_c-\${${1}_C}}
3435     eval ${1}_E=\${_cc_e-\${${1}_E}}
3436     eval ${1}_O=\${_cc_o-\${${1}_O}}
3437
3438     if [ -n "$_depflags" ]; then
3439         eval ${1}_DEPFLAGS=\$_depflags
3440     else
3441         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3442         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3443         eval DEP${1}FLAGS=\$_flags
3444     fi
3445 }
3446
3447 probe_cc cc "$cc"
3448 cflags_filter=$_flags_filter
3449 cflags_speed=$_cflags_speed
3450 cflags_size=$_cflags_size
3451 cflags_noopt=$_cflags_noopt
3452 add_cflags $_flags $_cflags
3453 cc_ldflags=$_ldflags
3454 set_ccvars CC
3455
3456 probe_cc hostcc "$host_cc"
3457 host_cflags_filter=$_flags_filter
3458 host_cflags_speed=$_cflags_speed
3459 add_host_cflags  $_flags $_cflags
3460 set_ccvars HOSTCC
3461
3462 test -n "$cc_type" && enable $cc_type ||
3463     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3464
3465 : ${as_default:=$cc}
3466 : ${objcc_default:=$cc}
3467 : ${dep_cc_default:=$cc}
3468 : ${ld_default:=$cc}
3469 : ${host_ld_default:=$host_cc}
3470 set_default ar as objcc dep_cc ld host_ld
3471
3472 probe_cc as "$as"
3473 asflags_filter=$_flags_filter
3474 add_asflags $_flags $_cflags
3475 set_ccvars AS
3476
3477 probe_cc objcc "$objcc"
3478 objcflags_filter=$_flags_filter
3479 add_objcflags $_flags $_cflags
3480 set_ccvars OBJC
3481
3482 probe_cc ld "$ld"
3483 ldflags_filter=$_flags_filter
3484 add_ldflags $_flags $_ldflags
3485 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3486 LD_O=${_ld_o-$LD_O}
3487 LD_LIB=${_ld_lib-$LD_LIB}
3488 LD_PATH=${_ld_path-$LD_PATH}
3489
3490 probe_cc hostld "$host_ld"
3491 host_ldflags_filter=$_flags_filter
3492 add_host_ldflags $_flags $_ldflags
3493 HOSTLD_O=${_ld_o-$HOSTLD_O}
3494
3495 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3496     probe_cc depcc "$dep_cc"
3497     CCDEP=${_DEPCMD:-$DEPCMD}
3498     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3499     DEPCCFLAGS=$_flags
3500 fi
3501
3502 if $ar 2>&1 | grep -q Microsoft; then
3503     arflags="-nologo"
3504     ar_o='-out:$@'
3505 else
3506     arflags="rc"
3507     ar_o='$@'
3508 fi
3509
3510 add_cflags $extra_cflags
3511 add_objcflags $extra_objcflags
3512 add_asflags $extra_cflags
3513
3514 if test -n "$sysroot"; then
3515     case "$cc_type" in
3516         gcc|llvm_gcc|clang)
3517             add_cppflags --sysroot="$sysroot"
3518             add_ldflags --sysroot="$sysroot"
3519         ;;
3520     esac
3521 fi
3522
3523 if test "$cpu" = host; then
3524     enabled cross_compile &&
3525         die "--cpu=host makes no sense when cross-compiling."
3526
3527     case "$cc_type" in
3528         gcc|llvm_gcc)
3529             check_native(){
3530                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3531                 sed -n "/cc1.*$1=/{
3532                             s/.*$1=\\([^ ]*\\).*/\\1/
3533                             p
3534                             q
3535                         }" $TMPE
3536             }
3537             cpu=$(check_native -march || check_native -mcpu)
3538         ;;
3539     esac
3540
3541     test "${cpu:-host}" = host &&
3542         die "--cpu=host not supported with compiler $cc"
3543 fi
3544
3545 # Deal with common $arch aliases
3546 case "$arch" in
3547     aarch64|arm64)
3548         arch="aarch64"
3549     ;;
3550     arm*)
3551         arch="arm"
3552     ;;
3553     mips*|IP*)
3554         case "$arch" in
3555         *el)
3556             add_cppflags -EL
3557             add_ldflags -EL
3558         ;;
3559         *eb)
3560             add_cppflags -EB
3561             add_ldflags -EB
3562         ;;
3563         esac
3564         arch="mips"
3565     ;;
3566     parisc*|hppa*)
3567         arch="parisc"
3568     ;;
3569     "Power Macintosh"|ppc*|powerpc*)
3570         arch="ppc"
3571     ;;
3572     s390|s390x)
3573         arch="s390"
3574     ;;
3575     sh4|sh)
3576         arch="sh4"
3577     ;;
3578     sun4u|sparc*)
3579         arch="sparc"
3580     ;;
3581     tilegx|tile-gx)
3582         arch="tilegx"
3583     ;;
3584     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3585         arch="x86"
3586     ;;
3587 esac
3588
3589 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3590 enable $arch
3591
3592 # Add processor-specific flags
3593 if enabled aarch64; then
3594
3595     case $cpu in
3596         armv*)
3597             cpuflags="-march=$cpu"
3598         ;;
3599         *)
3600             cpuflags="-mcpu=$cpu"
3601         ;;
3602     esac
3603
3604 elif enabled alpha; then
3605
3606     cpuflags="-mcpu=$cpu"
3607
3608 elif enabled arm; then
3609
3610     check_arm_arch() {
3611         test_cpp_condition stddef.h \
3612             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3613             $cpuflags
3614     }
3615
3616     probe_arm_arch() {
3617         if   check_arm_arch 4;        then echo armv4
3618         elif check_arm_arch 4T;       then echo armv4t
3619         elif check_arm_arch 5;        then echo armv5
3620         elif check_arm_arch 5E;       then echo armv5e
3621         elif check_arm_arch 5T;       then echo armv5t
3622         elif check_arm_arch 5TE;      then echo armv5te
3623         elif check_arm_arch 5TEJ;     then echo armv5te
3624         elif check_arm_arch 6;        then echo armv6
3625         elif check_arm_arch 6J;       then echo armv6j
3626         elif check_arm_arch 6K;       then echo armv6k
3627         elif check_arm_arch 6Z;       then echo armv6z
3628         elif check_arm_arch 6ZK;      then echo armv6zk
3629         elif check_arm_arch 6T2;      then echo armv6t2
3630         elif check_arm_arch 7;        then echo armv7
3631         elif check_arm_arch 7A  7_A;  then echo armv7-a
3632         elif check_arm_arch 7S;       then echo armv7-a
3633         elif check_arm_arch 7R  7_R;  then echo armv7-r
3634         elif check_arm_arch 7M  7_M;  then echo armv7-m
3635         elif check_arm_arch 7EM 7E_M; then echo armv7-m
3636         elif check_arm_arch 8A  8_A;  then echo armv8-a
3637         fi
3638     }
3639
3640     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3641
3642     case $cpu in
3643         armv*)
3644             cpuflags="-march=$cpu"
3645             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3646         ;;
3647         *)
3648             cpuflags="-mcpu=$cpu"
3649             case $cpu in
3650                 cortex-a*)                               subarch=armv7a  ;;
3651                 cortex-r*)                               subarch=armv7r  ;;
3652                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3653                 arm11*)                                  subarch=armv6   ;;
3654                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3655                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3656                 *)                             subarch=$(probe_arm_arch) ;;
3657             esac
3658         ;;
3659     esac
3660
3661     case "$subarch" in
3662         armv5t*)    enable fast_clz                ;;
3663         armv[6-8]*) enable fast_clz fast_unaligned ;;
3664     esac
3665
3666 elif enabled avr32; then
3667
3668     case $cpu in
3669         ap7[02]0[0-2])
3670             subarch="avr32_ap"
3671             cpuflags="-mpart=$cpu"
3672         ;;
3673         ap)
3674             subarch="avr32_ap"
3675             cpuflags="-march=$cpu"
3676         ;;
3677         uc3[ab]*)
3678             subarch="avr32_uc"
3679             cpuflags="-mcpu=$cpu"
3680         ;;
3681         uc)
3682             subarch="avr32_uc"
3683             cpuflags="-march=$cpu"
3684         ;;
3685     esac
3686
3687 elif enabled bfin; then
3688
3689     cpuflags="-mcpu=$cpu"
3690
3691 elif enabled mips; then
3692
3693     cpuflags="-march=$cpu"
3694
3695 elif enabled ppc; then
3696
3697     disable ldbrx
3698
3699     case $(tolower $cpu) in
3700         601|ppc601|powerpc601)
3701             cpuflags="-mcpu=601"
3702             disable altivec
3703         ;;
3704         603*|ppc603*|powerpc603*)
3705             cpuflags="-mcpu=603"
3706             disable altivec
3707         ;;
3708         604*|ppc604*|powerpc604*)
3709             cpuflags="-mcpu=604"
3710             disable altivec
3711         ;;
3712         g3|75*|ppc75*|powerpc75*)
3713             cpuflags="-mcpu=750"
3714             disable altivec
3715         ;;
3716         g4|745*|ppc745*|powerpc745*)
3717             cpuflags="-mcpu=7450"
3718             disable vsx
3719         ;;
3720         74*|ppc74*|powerpc74*)
3721             cpuflags="-mcpu=7400"
3722             disable vsx
3723         ;;
3724         g5|970|ppc970|powerpc970)
3725             cpuflags="-mcpu=970"
3726             disable vsx
3727         ;;
3728         power[3-6]*)
3729             cpuflags="-mcpu=$cpu"
3730             disable vsx
3731         ;;
3732         power[7-8]*)
3733             cpuflags="-mcpu=$cpu"
3734             enable ldbrx
3735         ;;
3736         cell)
3737             cpuflags="-mcpu=cell"
3738             enable ldbrx
3739             disable vsx
3740         ;;
3741         e500mc)
3742             cpuflags="-mcpu=e500mc"
3743             disable altivec
3744         ;;
3745         e500v2)
3746             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3747             disable altivec
3748             disable dcbzl
3749         ;;
3750         e500)
3751             cpuflags="-mcpu=8540 -mhard-float"
3752             disable altivec
3753             disable dcbzl
3754         ;;
3755     esac
3756
3757 elif enabled sparc; then
3758
3759     case $cpu in
3760         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3761             cpuflags="-mcpu=$cpu"
3762         ;;
3763         ultrasparc*|niagara[234])
3764             cpuflags="-mcpu=$cpu"
3765         ;;
3766     esac
3767
3768 elif enabled x86; then
3769
3770     case $cpu in
3771         i[345]86|pentium)
3772             cpuflags="-march=$cpu"
3773             disable i686
3774             disable mmx
3775         ;;
3776         # targets that do NOT support nopl and conditional mov (cmov)
3777         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3778             cpuflags="-march=$cpu"
3779             disable i686
3780         ;;
3781         # targets that do support nopl and conditional mov (cmov)
3782         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3783             cpuflags="-march=$cpu"
3784             enable i686
3785             enable fast_cmov
3786         ;;
3787         # targets that do support conditional mov but on which it's slow
3788         pentium4|pentium4m|prescott|nocona)
3789             cpuflags="-march=$cpu"
3790             enable i686
3791             disable fast_cmov
3792         ;;
3793     esac
3794
3795 fi
3796
3797 if [ "$cpu" != generic ]; then
3798     add_cflags  $cpuflags
3799     add_asflags $cpuflags
3800     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3801 fi
3802
3803 # compiler sanity check
3804 test_exec <<EOF
3805 int main(void){ return 0; }
3806 EOF
3807 if test "$?" != 0; then
3808     echo "$cc is unable to create an executable file."
3809     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3810         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3811         echo "Only do this if you know what cross compiling means."
3812     fi
3813     die "C compiler test failed."
3814 fi
3815
3816 add_cppflags -D_ISOC99_SOURCE
3817
3818 # some compilers silently accept -std=c11, so we also need to check that the
3819 # version macro is defined properly
3820 test_cpp_condition stdlib.h  "__STDC_VERSION__ >= 201112L" -std=c11 &&
3821     add_cflags -std=c11 ||
3822     check_cflags -std=c99
3823
3824 check_cppflags -D_FILE_OFFSET_BITS=64
3825 check_cppflags -D_LARGEFILE_SOURCE
3826
3827 add_host_cppflags -D_ISOC99_SOURCE
3828 check_host_cflags -std=c99
3829 check_host_cflags -Wall
3830 check_host_cflags $host_cflags_speed
3831
3832 check_64bit(){
3833     arch32=$1
3834     arch64=$2
3835     expr=${3:-'sizeof(void *) > 4'}
3836     test_code cc "" "int test[2*($expr) - 1]" &&
3837         subarch=$arch64 || subarch=$arch32
3838     enable $subarch
3839 }
3840
3841 case "$arch" in
3842     aarch64|alpha|ia64)
3843         enabled shared && enable_weak pic
3844     ;;
3845     mips)
3846         check_64bit mips mips64 '_MIPS_SIM > 1'
3847         enabled shared && enable_weak pic
3848     ;;
3849     parisc)
3850         check_64bit parisc parisc64
3851         enabled shared && enable_weak pic
3852     ;;
3853     ppc)
3854         check_64bit ppc ppc64
3855         enabled shared && enable_weak pic
3856     ;;
3857     s390)
3858         check_64bit s390 s390x
3859         enabled shared && enable_weak pic
3860     ;;
3861     sparc)
3862         check_64bit sparc sparc64
3863         enabled shared && enable_weak pic
3864     ;;
3865     x86)
3866         check_64bit x86_32 x86_64
3867         if enabled x86_64; then
3868             enabled shared && enable_weak pic
3869             objformat=elf64
3870         fi
3871     ;;
3872 esac
3873
3874 # OS specific
3875 case $target_os in
3876     aix)
3877         SHFLAGS=-shared
3878         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3879         enabled shared && add_ldflags -Wl,-brtl
3880         arflags='-Xany -r -c'
3881         ;;
3882     android)
3883         disable symver
3884         enable section_data_rel_ro
3885         SLIB_INSTALL_NAME='$(SLIBNAME)'
3886         SLIB_INSTALL_LINKS=
3887         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3888         ;;
3889     haiku)
3890         prefix_default="/boot/common"
3891         network_extralibs="-lnetwork"
3892         host_extralibs=
3893         ;;
3894     sunos)
3895         SHFLAGS='-shared -Wl,-h,$$(@F)'
3896         enabled x86 && append SHFLAGS -mimpure-text
3897         network_extralibs="-lsocket -lnsl"
3898         # When using suncc to build, the Solaris linker will mark
3899         # an executable with each instruction set encountered by
3900         # the Solaris assembler.  As our libraries contain their own
3901         # guards for processor-specific code, instead suppress
3902         # generation of the HWCAPS ELF section on Solaris x86 only.
3903         enabled_all suncc x86 &&
3904             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3905             add_ldflags -Wl,-M,mapfile
3906         nm_default='nm -P -g'
3907         version_script='-M'
3908         VERSION_SCRIPT_POSTPROCESS_CMD='perl $(SRC_PATH)/compat/solaris/make_sunver.pl - $(OBJS)'
3909         ;;
3910     netbsd)
3911         disable symver
3912         oss_indev_extralibs="-lossaudio"
3913         ;;
3914     openbsd|bitrig)
3915         disable symver
3916         SHFLAGS='-shared'
3917         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3918         SLIB_INSTALL_LINKS=
3919         oss_indev_extralibs="-lossaudio"
3920         ;;
3921     dragonfly)
3922         disable symver
3923         ;;
3924     freebsd)
3925         ;;
3926     bsd/os)
3927         add_extralibs -lpoll -lgnugetopt
3928         ;;
3929     darwin)
3930         enabled ppc && add_asflags -force_cpusubtype_ALL
3931         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3932         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3933         add_ldflags -Wl,-dynamic,-search_paths_first
3934         check_cflags -Werror=partial-availability
3935         SLIBSUF=".dylib"
3936         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME).$(LIBVERSION)$(SLIBSUF)'
3937         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME).$(LIBMAJOR)$(SLIBSUF)'
3938         enabled x86_64 && objformat="macho64" || objformat="macho32"
3939         enabled_any pic shared ||
3940             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3941         check_header dispatch/dispatch.h &&
3942             add_cppflags '-I\$(SRC_PATH)/compat/dispatch_semaphore'
3943         if test -n "$sysroot"; then
3944             is_in -isysroot $cc $CPPFLAGS $CFLAGS || check_cppflags -isysroot $sysroot
3945             is_in -isysroot $ld $LDFLAGS          || check_ldflags  -isysroot $sysroot
3946         fi
3947         ;;
3948     msys*)
3949         die "Native MSYS builds are discouraged, please use the MINGW environment."
3950         ;;
3951     mingw32*|mingw64*)
3952         target_os=mingw32
3953         LIBTARGET=i386
3954         if enabled x86_64; then
3955             LIBTARGET="i386:x86-64"
3956         elif enabled arm; then
3957             LIBTARGET="arm"
3958         elif enabled aarch64; then
3959             LIBTARGET="arm64"
3960         fi
3961         if enabled shared; then
3962             # Cannot build both shared and static libs when using dllimport.
3963             disable static
3964         fi
3965         check_ldflags -Wl,--nxcompat
3966         check_ldflags -Wl,--dynamicbase
3967         shlibdir_default="$bindir_default"
3968         SLIBPREF=""
3969         SLIBSUF=".dll"
3970         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3971         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3972         SLIB_EXTRA_CMD=-'$(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3973         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3974         SLIB_INSTALL_LINKS=
3975         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3976         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3977         SLIB_CREATE_DEF_CMD='EXTERN_PREFIX="$(EXTERN_PREFIX)" AR="$(AR_CMD)" NM="$(NM_CMD)" $(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3978         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-auto-image-base $$(@:$(SLIBSUF)=.def)'
3979         enabled x86_64 && objformat="win64" || objformat="win32"
3980         dlltool="${cross_prefix}dlltool"
3981         ranlib=:
3982         enable dos_paths
3983         ;;
3984     win32|win64)
3985         disable symver
3986         if enabled shared; then
3987             # Link to the import library instead of the normal static library
3988             # for shared libs.
3989             LD_LIB='%.lib'
3990             # Cannot build both shared and static libs with MSVC or icl.
3991             disable static
3992         fi
3993         shlibdir_default="$bindir_default"
3994         SLIBPREF=""
3995         SLIBSUF=".dll"
3996         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3997         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3998         SLIB_CREATE_DEF_CMD='EXTERN_PREFIX="$(EXTERN_PREFIX)" $(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3999         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4000         SLIB_INSTALL_LINKS=
4001         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
4002         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
4003         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
4004         enabled x86_64 && objformat="win64" || objformat="win32"
4005         ranlib=:
4006         enable dos_paths
4007         ;;
4008     cygwin*)
4009         target_os=cygwin
4010         shlibdir_default="$bindir_default"
4011         SLIBPREF="cyg"
4012         SLIBSUF=".dll"
4013         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
4014         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
4015         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4016         SLIB_INSTALL_LINKS=
4017         SLIB_INSTALL_EXTRA_LIB='lib$(NAME).dll.a'
4018         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(NAME).dll.a'
4019         enabled x86_64 && objformat="win64" || objformat="win32"
4020         enable dos_paths
4021         ;;
4022     *-dos|freedos|opendos)
4023         network_extralibs="-lsocket"
4024         objformat="coff"
4025         enable dos_paths
4026         add_cppflags -U__STRICT_ANSI__
4027         ;;
4028     linux)
4029         enable section_data_rel_ro
4030         ;;
4031     irix*)
4032         target_os=irix
4033         ranlib="echo ignoring ranlib"
4034         ;;
4035     os/2*)
4036         ln_s="cp -f"
4037         objformat="aout"
4038         add_cppflags -D_GNU_SOURCE
4039         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zhigh-mem -Zmap
4040         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
4041         LIBSUF="_s.a"
4042         SLIBPREF=""
4043         SLIBSUF=".dll"
4044         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
4045         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
4046         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
4047             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
4048             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
4049             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
4050             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
4051         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
4052             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
4053         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
4054         enable dos_paths
4055         ;;
4056     gnu/kfreebsd)
4057         add_cppflags -D_BSD_SOURCE
4058         ;;
4059     gnu)
4060         ;;
4061     qnx)
4062         add_cppflags -D_QNX_SOURCE
4063         network_extralibs="-lsocket"
4064         ;;
4065     symbian)
4066         SLIBSUF=".dll"
4067         enable dos_paths
4068         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
4069         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
4070         add_ldflags -Wl,--target1-abs,--no-undefined \
4071                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
4072                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
4073         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
4074                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
4075                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
4076         ;;
4077     minix)
4078         ;;
4079     none)
4080         ;;
4081     *)
4082         die "Unknown OS '$target_os'."
4083         ;;
4084 esac
4085
4086 # determine libc flavour
4087
4088 probe_libc(){
4089     pfx=$1
4090     pfx_no_=${pfx%_}
4091     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
4092     if test_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
4093         eval ${pfx}libc_type=uclibc
4094         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4095     elif test_${pfx}cpp_condition features.h "defined __GLIBC__"; then
4096         eval ${pfx}libc_type=glibc
4097         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4098     # MinGW headers can be installed on Cygwin, so check for newlib first.
4099     elif test_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
4100         eval ${pfx}libc_type=newlib
4101         add_${pfx}cppflags -U__STRICT_ANSI__ -D_XOPEN_SOURCE=600
4102     # MinGW64 is backwards compatible with MinGW32, so check for it first.
4103     elif test_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
4104         eval ${pfx}libc_type=mingw64
4105         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4106         eval test \$${pfx_no_}cc_type = "gcc" &&
4107             add_${pfx}cppflags -D__printf__=__gnu_printf__
4108     elif test_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
4109          test_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
4110         eval ${pfx}libc_type=mingw32
4111         test_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
4112             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
4113             die "ERROR: MinGW32 runtime version must be >= 3.15."
4114         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4115         test_${pfx}cpp_condition _mingw.h "__MSVCRT_VERSION__ < 0x0700" &&
4116             add_${pfx}cppflags -D__MSVCRT_VERSION__=0x0700
4117         test_${pfx}cpp_condition windows.h "defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0502" &&
4118             add_${pfx}cppflags -D_WIN32_WINNT=0x0502
4119         eval test \$${pfx_no_}cc_type = "gcc" &&
4120             add_${pfx}cppflags -D__printf__=__gnu_printf__
4121     elif test_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
4122         eval ${pfx}libc_type=msvcrt
4123         if test_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
4124             if [ "$pfx" = host_ ]; then
4125                 add_host_cppflags -Dsnprintf=_snprintf
4126             else
4127                 add_compat strtod.o strtod=avpriv_strtod
4128                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
4129                                              _snprintf=avpriv_snprintf  \
4130                                              vsnprintf=avpriv_vsnprintf
4131             fi
4132         fi
4133         add_${pfx}cppflags -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS
4134         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
4135         # 0x601 by default unless something else is set by the user.
4136         # This can easily lead to us detecting functions only present
4137         # in such new versions and producing binaries requiring windows 7.0.
4138         # Therefore explicitly set the default to XP unless the user has
4139         # set something else on the command line.
4140         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
4141         # family. For these cases, configure is free to use any functions
4142         # found in the SDK headers by default. (Alternatively, we could force
4143         # _WIN32_WINNT to 0x0602 in that case.)
4144         test_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
4145             { test_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
4146 #ifdef WINAPI_FAMILY
4147 #include <winapifamily.h>
4148 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4149 #error not desktop
4150 #endif
4151 #endif
4152 EOF
4153         if [ "$pfx" = "" ]; then
4154             check_func strtoll || add_cflags -Dstrtoll=_strtoi64
4155         fi
4156     elif test_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4157         eval ${pfx}libc_type=klibc
4158     elif test_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4159         eval ${pfx}libc_type=bionic
4160     elif test_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4161         eval ${pfx}libc_type=solaris
4162         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4163     else
4164         eval ${pfx}libc_type=default
4165         add_${pfx}cppflags -D_DEFAULT_SOURCE
4166     fi
4167     eval test -n "\${${pfx}libc_type}" && enable ${pfx}libc_${libc_type}
4168 }
4169
4170 probe_libc
4171 probe_libc host_
4172
4173 # hacks for compiler/libc/os combinations
4174
4175 case $libc_type in
4176     bionic)
4177         add_compat strtod.o strtod=avpriv_strtod
4178         ;;
4179 esac
4180
4181 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4182     add_cppflags '-I\$(SRC_PATH)/compat/float'
4183
4184 test_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4185
4186 set_default $PATHS_LIST
4187 set_default nm
4188
4189 disabled optimizations || check_cflags -fomit-frame-pointer
4190
4191 enable_weak_pic() {
4192     disabled pic && return
4193     enable pic
4194     add_cppflags -DPIC
4195     case "$target_os" in
4196     mingw*|cygwin*|win*)
4197         ;;
4198     *)
4199         add_cflags -fPIC
4200         add_asflags -fPIC
4201         ;;
4202     esac
4203 }
4204
4205 enabled pic && enable_weak_pic
4206
4207 test_cc <<EOF || die "Symbol mangling check failed."
4208 int ff_extern;
4209 EOF
4210 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4211 extern_prefix=${sym%%ff_extern*}
4212
4213 ! disabled inline_asm && check_inline_asm inline_asm '"" ::'
4214
4215 for restrict_keyword in restrict __restrict__ __restrict ""; do
4216     test_code cc "" "char * $restrict_keyword p" && break
4217 done
4218
4219 check_cc pragma_deprecated "" '_Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"")'
4220
4221 # The global variable ensures the bits appear unchanged in the object file.
4222 test_cc <<EOF || die "endian test failed"
4223 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4224 EOF
4225 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4226
4227 check_gas() {
4228     log "check_gas using '$as' as AS"
4229     # :vararg is used on aarch64, arm and ppc altivec
4230     check_as vararg "
4231 .macro m n, y:vararg=0
4232 \n: .int \y
4233 .endm
4234 m x" || return 1
4235     # .altmacro is only used in arm asm
4236     ! enabled arm || check_as gnu_as ".altmacro"
4237 }
4238
4239 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4240     nogas=:
4241     enabled_any arm aarch64 && nogas=die
4242     enabled_all ppc altivec && nogas=warn
4243     as_noop=-v
4244
4245     case $as_type in
4246         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4247         gcc)  gaspp_as_type=gas ;;
4248         *)    gaspp_as_type=$as_type ;;
4249     esac
4250
4251     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4252
4253     test_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4254         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4255
4256     if ! check_gas ; then
4257         as=${gas:=$as}
4258         check_gas || \
4259             $nogas "GNU assembler not found, install/update gas-preprocessor"
4260     fi
4261
4262     check_as as_func ".func test
4263                       .endfunc"
4264 fi
4265
4266 check_inline_asm inline_asm_labels '"1:\n"'
4267
4268 if enabled aarch64; then
4269     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4270     # internal assembler in clang 3.3 does not support this instruction
4271     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4272     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4273
4274     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4275
4276 elif enabled alpha; then
4277
4278     check_cflags -mieee
4279
4280 elif enabled arm; then
4281
4282     enabled msvc && check_cpp_condition thumb stddef.h "defined _M_ARMT"
4283     test_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4284     enabled thumb && check_cflags -mthumb || check_cflags -marm
4285
4286     if check_cpp_condition vfp_args stddef.h "defined __ARM_PCS_VFP"; then
4287         :
4288     elif check_cpp_condition vfp_args stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4289         :
4290     elif ! test_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4291         case "${cross_prefix:-$cc}" in
4292             *hardfloat*) enable vfp_args; fpabi=vfp ;;
4293             *) check_ld vfp_args <<EOF && fpabi=vfp || fpabi=soft ;;
4294 __asm__ (".eabi_attribute 28, 1");
4295 int main(void) { return 0; }
4296 EOF
4297         esac
4298         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4299     fi
4300
4301     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4302     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4303     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4304     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4305     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4306     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4307
4308     [ $target_os = linux ] || [ $target_os = android ] ||
4309         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4310             $ARCH_EXT_LIST_ARM
4311
4312     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4313
4314     check_as as_arch_directive ".arch armv7-a"
4315     check_as as_fpu_directive  ".fpu neon"
4316
4317     # llvm's integrated assembler supports .object_arch from llvm 3.5
4318     [ "$objformat" = elf32 ] || [ "$objformat" = elf64 ] &&
4319         check_as as_object_arch ".object_arch armv4"
4320
4321     # MS armasm fails to assemble our PIC constructs
4322     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4323
4324 elif enabled mips; then
4325
4326     # make sure that only one instruction set is enabled
4327     disable $ARCH_EXT_LIST_MIPS
4328
4329     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4330
4331     if enabled mips64; then
4332         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4333             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4334                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4335     else
4336         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4337             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4338                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4339     fi
4340
4341 elif enabled parisc; then
4342
4343     if enabled gcc; then
4344         case $($cc -dumpversion) in
4345             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4346         esac
4347     fi
4348
4349 elif enabled ppc; then
4350
4351     enable local_aligned_8 local_aligned_16 local_aligned_32
4352
4353     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4354     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4355     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4356     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4357
4358     if enabled altivec; then
4359         check_cflags -maltivec -mabi=altivec
4360
4361         # check if our compiler supports Motorola AltiVec C API
4362         check_cc altivec altivec.h "vector signed int v1 = (vector signed int) { 0 };
4363                                     vector signed int v2 = (vector signed int) { 1 };
4364                                     v1 = vec_add(v1, v2);"
4365
4366         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4367     fi
4368
4369     if enabled vsx; then
4370         check_cflags -mvsx &&
4371         check_cc vsx altivec.h "int v[4] = { 0 };
4372                                 vector signed int v1 = vec_vsx_ld(0, v);"
4373     fi
4374
4375     if enabled power8; then
4376         check_cpp_condition power8 altivec.h "defined(_ARCH_PWR8)"
4377     fi
4378
4379 elif enabled x86; then
4380
4381     check_builtin rdtsc    intrin.h   "__rdtsc()"
4382     check_builtin mm_empty mmintrin.h "_mm_empty()"
4383
4384     enable local_aligned_8 local_aligned_16 local_aligned_32
4385
4386     # check whether EBP is available on x86
4387     # As 'i' is stored on the stack, this program will crash
4388     # if the base pointer is used to access it because the
4389     # base pointer is cleared in the inline assembly code.
4390     check_exec_crash <<EOF && enable ebp_available
4391 volatile int i=0;
4392 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4393 return i;
4394 EOF
4395
4396     # check whether EBX is available on x86
4397     check_inline_asm ebx_available '""::"b"(0)' &&
4398         check_inline_asm ebx_available '"":::"%ebx"'
4399
4400     # check whether xmm clobbers are supported
4401     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4402
4403     # check whether binutils is new enough to compile SSSE3/MMXEXT
4404     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4405     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4406
4407     probe_x86asm(){
4408         x86asmexe_probe=$1
4409         if test_cmd $x86asmexe_probe -v; then
4410             x86asmexe=$x86asmexe_probe
4411             x86asm_type=nasm
4412             x86asm_debug="-g -F dwarf"
4413             X86ASMDEP=
4414             X86ASM_DEPFLAGS='-MD $(@:.o=.d)'
4415         elif test_cmd $x86asmexe_probe --version; then
4416             x86asmexe=$x86asmexe_probe
4417             x86asm_type=yasm
4418             x86asm_debug="-g dwarf2"
4419             X86ASMDEP='$(DEPX86ASM) $(X86ASMFLAGS) -M $(X86ASM_O) $< > $(@:.o=.d)'
4420             X86ASM_DEPFLAGS=
4421         fi
4422         check_x86asm x86asm "movbe ecx, [5]"
4423     }
4424
4425     if ! disabled_any asm mmx x86asm; then
4426         disable x86asm
4427         for program in $x86asmexe nasm yasm; do
4428             probe_x86asm $program && break
4429         done
4430         disabled x86asm && die "nasm/yasm not found or too old. Use --disable-x86asm for a crippled build."
4431         X86ASMFLAGS="-f $objformat"
4432         enabled pic               && append X86ASMFLAGS "-DPIC"
4433         test -n "$extern_prefix"  && append X86ASMFLAGS "-DPREFIX"
4434         case "$objformat" in
4435             elf*) enabled debug && append X86ASMFLAGS $x86asm_debug ;;
4436         esac
4437
4438         check_x86asm avx2_external "vextracti128 xmm0, ymm0, 0"
4439         check_x86asm  xop_external "vpmacsdd xmm0, xmm1, xmm2, xmm3"
4440         check_x86asm fma3_external "vfmadd132ps ymm0, ymm1, ymm2"
4441         check_x86asm fma4_external "vfmaddps ymm0, ymm1, ymm2, ymm3"
4442         check_x86asm cpunop        "CPU amdnop"
4443     fi
4444
4445     case "$cpu" in
4446         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4447             disable fast_clz
4448         ;;
4449     esac
4450
4451 fi
4452
4453 check_cc intrinsics_neon arm_neon.h "int16x8_t test = vdupq_n_s16(0)"
4454
4455 check_ldflags -Wl,--as-needed
4456
4457 if ! disabled network; then
4458     check_func getaddrinfo $network_extralibs
4459     check_func inet_aton $network_extralibs
4460
4461     check_type netdb.h "struct addrinfo"
4462     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4463     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4464     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4465     check_type poll.h "struct pollfd"
4466     check_type netinet/sctp.h "struct sctp_event_subscribe"
4467     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4468     check_type netinet/in.h "struct sockaddr_in6"
4469     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4470     check_type "sys/types.h sys/socket.h" socklen_t
4471
4472     # Prefer arpa/inet.h over winsock2
4473     if check_header arpa/inet.h ; then
4474         check_func closesocket
4475     elif check_header winsock2.h ; then
4476         check_func_headers winsock2.h closesocket -lws2 &&
4477             network_extralibs="-lws2" ||
4478         { check_func_headers winsock2.h closesocket -lws2_32 &&
4479             network_extralibs="-lws2_32"; } || disable winsock2_h network
4480         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4481
4482         check_type ws2tcpip.h socklen_t
4483         check_type ws2tcpip.h "struct addrinfo"
4484         check_type ws2tcpip.h "struct group_source_req"
4485         check_type ws2tcpip.h "struct ip_mreq_source"
4486         check_type ws2tcpip.h "struct ipv6_mreq"
4487         check_type winsock2.h "struct pollfd"
4488         check_struct winsock2.h "struct sockaddr" sa_len
4489         check_type ws2tcpip.h "struct sockaddr_in6"
4490         check_type ws2tcpip.h "struct sockaddr_storage"
4491     else
4492         disable network
4493     fi
4494 fi
4495
4496 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4497 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4498 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4499 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4500
4501 case "$custom_allocator" in
4502     jemalloc)
4503         # jemalloc by default does not use a prefix
4504         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4505     ;;
4506     tcmalloc)
4507         require_pkg_config libtcmalloc libtcmalloc gperftools/tcmalloc.h tc_malloc
4508         malloc_prefix=tc_
4509     ;;
4510 esac
4511
4512 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4513 check_func  ${malloc_prefix}memalign            && enable memalign
4514 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4515
4516 test_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4517     { check_lib clock_gettime time.h clock_gettime ||
4518       check_lib clock_gettime time.h clock_gettime -lrt; }
4519
4520 check_func  fcntl
4521 check_func  gethrtime
4522 check_func  getopt
4523 check_func  getrusage
4524 check_func  gettimeofday
4525 check_func  gmtime_r
4526 check_func  isatty
4527 check_func  localtime_r
4528 check_func  mkstemp
4529 check_func  mmap
4530 check_func  mprotect
4531 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4532 check_func_headers time.h nanosleep || check_lib nanosleep time.h nanosleep -lrt
4533 check_func  sched_getaffinity
4534 check_func  setrlimit
4535 check_func  strerror_r
4536 check_func  sysconf
4537 check_func  sysctl
4538 check_func  usleep
4539
4540 check_func_headers io.h setmode
4541 check_func_headers mach/mach_time.h mach_absolute_time
4542 check_func_headers stdlib.h getenv
4543
4544 check_func_headers windows.h GetProcessAffinityMask
4545 check_func_headers windows.h GetProcessTimes
4546 check_func_headers windows.h GetSystemTimeAsFileTime
4547 check_func_headers windows.h LoadLibrary
4548 check_func_headers windows.h MapViewOfFile
4549 check_func_headers windows.h SetConsoleTextAttribute
4550 check_func_headers windows.h Sleep
4551 check_func_headers windows.h VirtualAlloc
4552 check_struct windows.h "CONDITION_VARIABLE" Ptr
4553
4554 check_header direct.h
4555 check_header dxgidebug.h
4556 check_header dxva.h
4557 check_header dxva2api.h
4558 check_header io.h
4559 check_header malloc.h
4560 check_header poll.h
4561 check_header sys/param.h
4562 check_header sys/resource.h
4563 check_header sys/select.h
4564 check_header sys/time.h
4565 check_header sys/un.h
4566 check_header unistd.h
4567 check_header valgrind/valgrind.h
4568 check_header VideoDecodeAcceleration/VDADecoder.h
4569 check_header windows.h
4570
4571 # it seems there are versions of clang in some distros that try to use the
4572 # gcc headers, which explodes for stdatomic
4573 # so we also check that atomics actually work here
4574 check_builtin stdatomic stdatomic.h "atomic_int foo; atomic_store(&foo, 0)"
4575
4576 check_lib ole32    "windows.h"            CoTaskMemFree        -lole32
4577 check_lib shell32  "windows.h shellapi.h" CommandLineToArgvW   -lshell32
4578 check_lib wincrypt "windows.h wincrypt.h" CryptGenRandom       -ladvapi32
4579 check_lib psapi    "windows.h psapi.h"    GetProcessMemoryInfo -lpsapi
4580
4581 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4582
4583 check_type "cuviddec.h" "CUVIDH264PICPARAMS"
4584 check_type "cuviddec.h" "CUVIDHEVCPICPARAMS"
4585 check_struct "cuviddec.h" "CUVIDDECODECREATEINFO" bitDepthMinus8
4586
4587 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4588 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4589 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4590
4591 check_type "va/va.h va/va_dec_hevc.h" "VAPictureParameterBufferHEVC"
4592 check_type "va/va.h va/va_dec_vp8.h" "VAPictureParameterBufferVP8"
4593 check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
4594 check_type "va/va.h va/va_enc_h264.h" "VAEncPictureParameterBufferH264"
4595 check_type "va/va.h va/va_enc_hevc.h" "VAEncPictureParameterBufferHEVC"
4596 check_type "va/va.h va/va_enc_jpeg.h" "VAEncPictureParameterBufferJPEG"
4597 check_type "va/va.h va/va_enc_mpeg2.h" "VAEncPictureParameterBufferMPEG2"
4598 check_type "va/va.h va/va_enc_vp8.h"  "VAEncPictureParameterBufferVP8"
4599 check_type "va/va.h va/va_enc_vp9.h"  "VAEncPictureParameterBufferVP9"
4600
4601 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4602
4603 if ! disabled w32threads && ! enabled pthreads; then
4604     check_lib w32threads "windows.h process.h" _beginthreadex
4605 fi
4606
4607 # check for some common methods of building with pthread support
4608 # do this before the optional library checks as some of them require pthreads
4609 if ! disabled pthreads && ! enabled w32threads; then
4610     if check_lib pthreads pthread.h pthread_join -pthread; then
4611         add_cflags -pthread
4612     elif check_lib pthreads pthread.h pthread_join -pthreads; then
4613         add_cflags -pthreads
4614     elif check_lib pthreads pthread.h pthread_join -lpthreadGC2; then
4615         :
4616     elif check_lib pthreads pthread.h pthread_join -lpthread; then
4617         :
4618     elif check_func pthread_join; then
4619         enable pthreads
4620     fi
4621     enabled pthreads &&
4622         check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwait(s,0); sem_destroy(s)" $pthreads_extralibs
4623 fi
4624
4625 disabled  zlib || check_lib  zlib  zlib.h      zlibVersion -lz
4626 disabled bzlib || check_lib bzlib bzlib.h BZ2_bzlibVersion -lbz2
4627
4628 # On some systems dynamic loading requires no extra linker flags
4629 check_lib libdl dlfcn.h dlopen || check_lib libdl dlfcn.h dlopen -ldl
4630
4631 check_lib libm math.h sin -lm
4632
4633 atan2f_args=2
4634 ldexpf_args=2
4635 powf_args=2
4636
4637 for func in $MATH_FUNCS; do
4638     eval check_mathfunc $func \${${func}_args:-1} $libm_extralibs
4639 done
4640
4641 # these are off by default, so fail if requested and not available
4642 enabled amf               && require_cpp_condition AMF/core/Version.h "(AMF_VERSION_MAJOR << 48 | AMF_VERSION_MINOR << 32 | AMF_VERSION_RELEASE << 16 | AMF_VERSION_BUILD_NUM) >= 0x0001000400040001"
4643 enabled avisynth          && require_header avisynth/avisynth_c.h
4644 enabled avxsynth          && require_header avxsynth/avxsynth_c.h
4645 enabled cuda              && require cuda cuda.h cuInit -lcuda
4646 enabled cuvid             && require cuvid cuviddec.h cuvidCreateDecoder -lnvcuvid
4647 enabled frei0r            && require_header frei0r.h
4648 enabled gnutls            && require_pkg_config gnutls gnutls gnutls/gnutls.h gnutls_global_init &&
4649                              check_lib gmp gmp.h mpz_export -lgmp
4650 enabled libaom            && require_pkg_config libaom "aom >= 0.1.0" aom/aom_codec.h aom_codec_version
4651 enabled libbs2b           && require_pkg_config libbs2b libbs2b bs2b.h bs2b_open
4652 enabled libdc1394         && require_pkg_config libdc1394 libdc1394-2 dc1394/dc1394.h dc1394_new
4653 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4654 enabled libfaac           && require libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4655 enabled libfdk_aac        && require_pkg_config libfdk_aac fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4656 enabled libfontconfig     && require_pkg_config libfontconfig fontconfig "fontconfig/fontconfig.h" FcInit
4657 enabled libfreetype       && require_pkg_config libfreetype freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4658 enabled libgsm            && require libgsm gsm.h gsm_create -lgsm
4659 enabled libhdcd           && require_pkg_config libhdcd libhdcd "hdcd/hdcd_simple.h" hdcd_new
4660 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4661 enabled libkvazaar        && require_pkg_config libkvazaar "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4662 enabled libmfx            && require_pkg_config libmfx libmfx "mfx/mfxvideo.h" MFXInit
4663 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4664 enabled libnpp            && require libnpp npp.h nppGetLibVersion -lnppi -lnppc
4665 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4666 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4667 enabled libopencv         && require_pkg_config libopencv opencv opencv/cv.h cvCreateImageHeader
4668 enabled libopenh264       && require_pkg_config libopenh264 openh264 wels/codec_api.h WelsGetCodecVersion
4669 enabled libopenjpeg       && { check_lib libopenjpeg openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC ||
4670                                require_pkg_config libopenjpeg libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; }
4671 enabled libopus           && require_pkg_config libopus opus opus_multistream.h opus_multistream_decoder_create
4672 enabled libpulse          && require_pkg_config libpulse libpulse-simple pulse/simple.h pa_simple_new
4673 enabled librtmp           && require_pkg_config librtmp librtmp librtmp/rtmp.h RTMP_Socket
4674 enabled libschroedinger   && require_pkg_config libschroedinger schroedinger-1.0 schroedinger/schro.h schro_init
4675 enabled libsnappy         && require libsnappy snappy-c.h snappy_compress -lsnappy
4676 enabled libspeex          && require_pkg_config libspeex speex speex/speex.h speex_decoder_init
4677 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4678 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4679 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4680 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4681 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4682 enabled libvpx            && require_pkg_config libvpx "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version &&
4683                              { enabled libvpx_vp8_decoder &&
4684                                    check_pkg_config libvpx_vp8_decoder vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx
4685                                enabled libvpx_vp8_encoder &&
4686                                    check_pkg_config libvpx_vp8_encoder vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx
4687                                enabled libvpx_vp9_decoder &&
4688                                    check_pkg_config libvpx_vp9_decoder vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx
4689                                enabled libvpx_vp9_encoder &&
4690                                    check_pkg_config libvpx_vp9_encoder vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx
4691                                disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder &&
4692                                    die "libvpx enabled but no supported decoders/encoders found"
4693                              }
4694 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4695 enabled libwebp           && require_pkg_config libwebp libwebp webp/encode.h WebPGetEncoderVersion
4696 enabled libx264           && require_pkg_config libx264 x264 "stdint.h x264.h" x264_encoder_encode &&
4697                              require_cpp_condition x264.h "X264_BUILD >= 118" &&
4698                              check_cpp_condition libx262 x264.h "X264_MPEG2"
4699 enabled libx265           && require_pkg_config libx265 x265 x265.h x265_api_get &&
4700                              require_cpp_condition x265.h "X265_BUILD >= 57"
4701 enabled libxavs           && require libxavs "stdint.h xavs.h" xavs_encoder_encode -lxavs
4702 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4703 enabled mmal              && { check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4704                                { ! enabled cross_compile &&
4705                                  add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline &&
4706                                  add_ldflags -L/opt/vc/lib/ &&
4707                                  check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host; } ||
4708                                die "ERROR: mmal not found" &&
4709                                check_func_headers interface/mmal/mmal.h "MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS"; }
4710 enabled nvenc             && require_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 6"
4711 enabled omx               && require_header OMX_Core.h
4712 enabled omx_rpi           && { check_header OMX_Core.h ||
4713                                { ! enabled cross_compile && add_cflags -isystem/opt/vc/include/IL && check_header OMX_Core.h ; } ||
4714                                die "ERROR: OpenMAX IL headers not found"; } && enable omx
4715 enabled openssl           && { { check_pkg_config openssl openssl openssl/ssl.h OPENSSL_init_ssl ||
4716                                  check_pkg_config openssl openssl openssl/ssl.h SSL_library_init; } ||
4717                                check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4718                                check_lib openssl openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4719                                check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4720                                die "ERROR: openssl not found"; }
4721
4722 # SDL adds some CFLAGS that should not be part of the general CFLAGS.
4723 enabled avplay &&
4724     test_pkg_config sdl "sdl >= 1.2.1 sdl < 1.3.0" SDL_events.h SDL_PollEvent
4725
4726 check_header linux/fb.h
4727 check_header linux/videodev2.h
4728 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4729
4730 check_header AVFoundation/AVFoundation.h
4731
4732 check_header sys/videoio.h
4733
4734 check_lib user32 "windows.h winuser.h" GetShellWindow -luser32
4735 check_lib vfw32 "windows.h vfw.h" capCreateCaptureWindow -lvfw32
4736 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4737 # w32api 3.12 had it defined wrong
4738 check_cpp_condition vfwcap_defines vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER"
4739
4740 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4741 check_header "dev/bktr/ioctl_meteor.h dev/bktr/ioctl_bt848.h"                   ||
4742     check_header "machine/ioctl_meteor.h machine/ioctl_bt848.h"                 ||
4743     check_header "dev/video/meteor/ioctl_meteor.h dev/video/bktr/ioctl_bt848.h" ||
4744     check_header "dev/ic/bt8xx.h"
4745
4746 check_header sys/soundcard.h
4747
4748 enabled alsa_indev &&
4749     check_lib alsa alsa/asoundlib.h snd_pcm_htimestamp -lasound
4750
4751 enabled libjack &&
4752     require_pkg_config libjack jack jack/jack.h jack_port_get_latency_range
4753
4754 enabled sndio_indev && check_lib sndio sndio.h sio_open -lsndio
4755
4756 if enabled libcdio; then
4757     check_lib libcdio "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4758     check_lib libcdio "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4759     die "ERROR: No usable libcdio/cdparanoia found"
4760 fi
4761
4762 if enabled libxcb; then
4763     require_pkg_config libxcb xcb xcb/xcb.h xcb_connect
4764     require_pkg_config libxcb_shape xcb-shape xcb/shape.h xcb_shape_rectangles
4765     disabled libxcb_shm ||
4766         check_pkg_config libxcb_shm xcb-shm xcb/shm.h xcb_shm_attach
4767     disabled libxcb_xfixes ||
4768         check_pkg_config libxcb_xfixes xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image
4769 fi
4770
4771 # d3d11va requires linking directly to dxgi and d3d11 if not building for
4772 # the desktop api partition
4773 test_cpp <<EOF && enable uwp && d3d11va_extralibs="-ldxgi -ld3d11"
4774 #ifdef WINAPI_FAMILY
4775 #include <winapifamily.h>
4776 #if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4777 #error desktop, not uwp
4778 #else
4779 // WINAPI_FAMILY_APP, WINAPI_FAMILY_PHONE_APP => UWP
4780 #endif
4781 #else
4782 #error no family set
4783 #endif
4784 EOF
4785
4786 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4787
4788 if enabled vaapi; then
4789      require_cc vaapi "va/va.h" "vaCreateSurfaces(0, 0, 0, 0, 0, 0, 0, 0)"
4790      check_lib vaapi_drm "va/va.h va/va_drm.h" vaGetDisplayDRM -lva -lva-drm
4791      check_lib vaapi_x11 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 -lX11
4792 fi
4793
4794 enabled vaapi &&
4795     test_cpp_condition "va/va.h" "VA_CHECK_VERSION(1, 0, 0)" &&
4796     enable vaapi_1
4797
4798 enabled vdpau &&
4799     check_cpp_condition vdpau vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP"
4800
4801 enabled vdpau &&
4802     check_lib vdpau_x11 "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau -lX11
4803
4804 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4805
4806 # add some useful compiler flags if supported
4807 check_cflags -Wdeclaration-after-statement
4808 check_cflags -Wall
4809 check_cflags -Wdisabled-optimization
4810 check_cflags -Wpointer-arith
4811 check_cflags -Wredundant-decls
4812 check_cflags -Wwrite-strings
4813 check_cflags -Wtype-limits
4814 check_cflags -Wundef
4815 check_cflags -Wmissing-prototypes
4816 check_cflags -Wstrict-prototypes
4817
4818 if enabled extra_warnings; then
4819     check_cflags -Wcast-qual
4820     check_cflags -Wextra
4821     check_cflags -Wpedantic
4822 fi
4823
4824 check_disable_warning(){
4825     warning_flag=-W${1#-Wno-}
4826     test_cflags $warning_flag && add_cflags $1
4827 }
4828
4829 check_disable_warning -Wno-parentheses
4830 check_disable_warning -Wno-switch
4831 check_disable_warning -Wno-format-zero-length
4832 check_disable_warning -Wno-pointer-sign
4833
4834 check_disable_warning_headers(){
4835     warning_flag=-W${1#-Wno-}
4836     test_cflags $warning_flag && add_cflags_headers $1
4837 }
4838
4839 check_disable_warning_headers -Wno-deprecated-declarations
4840 check_disable_warning_headers -Wno-unused-variable
4841
4842 check_objcflags -fobjc-arc && enable objc_arc
4843
4844 check_cc blocks_extension "" "void (^block)(void)"
4845
4846 # add some linker flags
4847 check_ldflags -Wl,--warn-common
4848 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4849 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir && add_ldsoflags -Wl,-rpath,$libdir
4850 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
4851
4852 # add some strip flags
4853 # -wN '..@*' is more selective than -x, but not available everywhere.
4854 check_stripflags -wN \'..@*\' || check_stripflags -x || strip='true'
4855
4856 enabled neon_clobber_test &&
4857     check_ldflags -Wl,--wrap,avcodec_open2              \
4858                   -Wl,--wrap,avcodec_decode_audio4      \
4859                   -Wl,--wrap,avcodec_decode_video2      \
4860                   -Wl,--wrap,avcodec_decode_subtitle2   \
4861                   -Wl,--wrap,avcodec_encode_audio2      \
4862                   -Wl,--wrap,avcodec_encode_video2      \
4863                   -Wl,--wrap,avcodec_encode_subtitle    \
4864                   -Wl,--wrap,avcodec_send_packet        \
4865                   -Wl,--wrap,avcodec_receive_packet     \
4866                   -Wl,--wrap,avcodec_send_frame         \
4867                   -Wl,--wrap,avcodec_receive_frame      \
4868                   -Wl,--wrap,avresample_convert ||
4869     disable neon_clobber_test
4870
4871 enabled xmm_clobber_test &&
4872     check_ldflags -Wl,--wrap,avcodec_open2              \
4873                   -Wl,--wrap,avcodec_decode_audio4      \
4874                   -Wl,--wrap,avcodec_decode_video2      \
4875                   -Wl,--wrap,avcodec_decode_subtitle2   \
4876                   -Wl,--wrap,avcodec_encode_audio2      \
4877                   -Wl,--wrap,avcodec_encode_video2      \
4878                   -Wl,--wrap,avcodec_encode_subtitle    \
4879                   -Wl,--wrap,avcodec_send_packet        \
4880                   -Wl,--wrap,avcodec_receive_packet     \
4881                   -Wl,--wrap,avcodec_send_frame         \
4882                   -Wl,--wrap,avcodec_receive_frame      \
4883                   -Wl,--wrap,avresample_convert         \
4884 &nb