Merge commit '83f230c2445a94fdd94c66504482217fcece5909'
[ffmpeg.git] / configure
1 #!/bin/sh
2 #
3 # FFmpeg 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 FFMPEG, 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 FFmpeg."
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:$PATH
58
59 show_help(){
60     cat <<EOF
61 Usage: configure [options]
62 Options: [defaults in brackets after descriptions]
63
64 Help options:
65   --help                   print this message
66   --list-decoders          show all available decoders
67   --list-encoders          show all available encoders
68   --list-hwaccels          show all available hardware accelerators
69   --list-demuxers          show all available demuxers
70   --list-muxers            show all available muxers
71   --list-parsers           show all available parsers
72   --list-protocols         show all available protocols
73   --list-bsfs              show all available bitstream filters
74   --list-indevs            show all available input devices
75   --list-outdevs           show all available output devices
76   --list-filters           show all available filters
77
78 Standard options:
79   --logfile=FILE           log tests and output to FILE [config.log]
80   --disable-logging        do not log configure debug information
81   --fatal-warnings         fail if any configure warning is generated
82   --prefix=PREFIX          install in PREFIX [$prefix]
83   --bindir=DIR             install binaries in DIR [PREFIX/bin]
84   --datadir=DIR            install data files in DIR [PREFIX/share/ffmpeg]
85   --docdir=DIR             install documentation in DIR [PREFIX/share/doc/ffmpeg]
86   --libdir=DIR             install libs in DIR [PREFIX/lib]
87   --shlibdir=DIR           install shared libs in DIR [LIBDIR]
88   --incdir=DIR             install includes in DIR [PREFIX/include]
89   --mandir=DIR             install man page in DIR [PREFIX/share/man]
90   --pkgconfigdir=DIR       install pkg-config files in DIR [LIBDIR/pkgconfig]
91   --enable-rpath           use rpath to allow installing libraries in paths
92                            not part of the dynamic linker search path
93                            use rpath when linking programs [USE WITH CARE]
94   --install-name-dir=DIR   Darwin directory name for installed targets
95
96 Licensing options:
97   --enable-gpl             allow use of GPL code, the resulting libs
98                            and binaries will be under GPL [no]
99   --enable-version3        upgrade (L)GPL to version 3 [no]
100   --enable-nonfree         allow use of nonfree code, the resulting libs
101                            and binaries will be unredistributable [no]
102
103 Configuration options:
104   --disable-static         do not build static libraries [no]
105   --enable-shared          build shared libraries [no]
106   --enable-small           optimize for size instead of speed
107   --disable-runtime-cpudetect disable detecting cpu capabilities at runtime (smaller binary)
108   --enable-gray            enable full grayscale support (slower color)
109   --disable-swscale-alpha  disable alpha channel support in swscale
110   --disable-all            disable building components, libraries and programs
111   --enable-incompatible-libav-abi enable incompatible Libav fork ABI [no]
112   --enable-raise-major     increase major version numbers in sonames [no]
113
114 Program options:
115   --disable-programs       do not build command line programs
116   --disable-ffmpeg         disable ffmpeg build
117   --disable-ffplay         disable ffplay build
118   --disable-ffprobe        disable ffprobe build
119   --disable-ffserver       disable ffserver build
120
121 Documentation options:
122   --disable-doc            do not build documentation
123   --disable-htmlpages      do not build HTML documentation pages
124   --disable-manpages       do not build man documentation pages
125   --disable-podpages       do not build POD documentation pages
126   --disable-txtpages       do not build text documentation pages
127
128 Component options:
129   --disable-avdevice       disable libavdevice build
130   --disable-avcodec        disable libavcodec build
131   --disable-avformat       disable libavformat build
132   --disable-swresample     disable libswresample build
133   --disable-swscale        disable libswscale build
134   --disable-postproc       disable libpostproc build
135   --disable-avfilter       disable libavfilter build
136   --enable-avresample      enable libavresample build [no]
137   --disable-pthreads       disable pthreads [autodetect]
138   --disable-w32threads     disable Win32 threads [autodetect]
139   --disable-os2threads     disable OS/2 threads [autodetect]
140   --disable-network        disable network support [no]
141   --disable-dct            disable DCT code
142   --disable-dwt            disable DWT code
143   --disable-error-resilience disable error resilience code
144   --disable-lsp            disable LSP code
145   --disable-lzo            disable LZO decoder code
146   --disable-mdct           disable MDCT code
147   --disable-rdft           disable RDFT code
148   --disable-fft            disable FFT code
149   --disable-faan           disable floating point AAN (I)DCT code
150   --disable-pixelutils     disable pixel utils in libavutil
151
152 Hardware accelerators:
153   --disable-d3d11va        disable D3D11VA code [autodetect]
154   --disable-dxva2          disable DXVA2 code [autodetect]
155   --disable-vaapi          disable VAAPI code [autodetect]
156   --disable-vda            disable VDA code [autodetect]
157   --disable-vdpau          disable VDPAU code [autodetect]
158
159 Individual component options:
160   --disable-everything     disable all components listed below
161   --disable-encoder=NAME   disable encoder NAME
162   --enable-encoder=NAME    enable encoder NAME
163   --disable-encoders       disable all encoders
164   --disable-decoder=NAME   disable decoder NAME
165   --enable-decoder=NAME    enable decoder NAME
166   --disable-decoders       disable all decoders
167   --disable-hwaccel=NAME   disable hwaccel NAME
168   --enable-hwaccel=NAME    enable hwaccel NAME
169   --disable-hwaccels       disable all hwaccels
170   --disable-muxer=NAME     disable muxer NAME
171   --enable-muxer=NAME      enable muxer NAME
172   --disable-muxers         disable all muxers
173   --disable-demuxer=NAME   disable demuxer NAME
174   --enable-demuxer=NAME    enable demuxer NAME
175   --disable-demuxers       disable all demuxers
176   --enable-parser=NAME     enable parser NAME
177   --disable-parser=NAME    disable parser NAME
178   --disable-parsers        disable all parsers
179   --enable-bsf=NAME        enable bitstream filter NAME
180   --disable-bsf=NAME       disable bitstream filter NAME
181   --disable-bsfs           disable all bitstream filters
182   --enable-protocol=NAME   enable protocol NAME
183   --disable-protocol=NAME  disable protocol NAME
184   --disable-protocols      disable all protocols
185   --enable-indev=NAME      enable input device NAME
186   --disable-indev=NAME     disable input device NAME
187   --disable-indevs         disable input devices
188   --enable-outdev=NAME     enable output device NAME
189   --disable-outdev=NAME    disable output device NAME
190   --disable-outdevs        disable output devices
191   --disable-devices        disable all devices
192   --enable-filter=NAME     enable filter NAME
193   --disable-filter=NAME    disable filter NAME
194   --disable-filters        disable all filters
195
196 External library support:
197   --disable-audiotoolbox   enable AudioToolbox decoders and encoders [autodetect]
198   --enable-avisynth        enable reading of AviSynth script files [no]
199   --disable-bzlib          disable bzlib [autodetect]
200   --enable-cuda            enable dynamically linked CUDA [no]
201   --enable-chromaprint     enable audio fingerprinting with chromaprint [no]
202   --enable-fontconfig      enable fontconfig, useful for drawtext filter [no]
203   --enable-frei0r          enable frei0r video filtering [no]
204   --enable-gcrypt          enable gcrypt, needed for rtmp(t)e support
205                            if openssl, librtmp or gmp is not used [no]
206   --enable-gmp             enable gmp, needed for rtmp(t)e support
207                            if openssl or librtmp is not used [no]
208   --enable-gnutls          enable gnutls, needed for https support
209                            if openssl is not used [no]
210   --disable-iconv          disable iconv [autodetect]
211   --enable-jni             enable JNI support [no]
212   --enable-ladspa          enable LADSPA audio filtering [no]
213   --enable-libass          enable libass subtitles rendering,
214                            needed for subtitles and ass filter [no]
215   --enable-libbluray       enable BluRay reading using libbluray [no]
216   --enable-libbs2b         enable bs2b DSP library [no]
217   --enable-libcaca         enable textual display using libcaca [no]
218   --enable-libcelt         enable CELT decoding via libcelt [no]
219   --enable-libcdio         enable audio CD grabbing with libcdio [no]
220   --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394
221                            and libraw1394 [no]
222   --enable-libfaac         enable AAC encoding via libfaac [no]
223   --enable-libfdk-aac      enable AAC de/encoding via libfdk-aac [no]
224   --enable-libflite        enable flite (voice synthesis) support via libflite [no]
225   --enable-libfreetype     enable libfreetype, needed for drawtext filter [no]
226   --enable-libfribidi      enable libfribidi, improves drawtext filter [no]
227   --enable-libgme          enable Game Music Emu via libgme [no]
228   --enable-libgsm          enable GSM de/encoding via libgsm [no]
229   --enable-libiec61883     enable iec61883 via libiec61883 [no]
230   --enable-libilbc         enable iLBC de/encoding via libilbc [no]
231   --enable-libkvazaar      enable HEVC encoding via libkvazaar [no]
232   --enable-libmfx          enable HW acceleration through libmfx
233   --enable-libmodplug      enable ModPlug via libmodplug [no]
234   --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
235   --enable-libnut          enable NUT (de)muxing via libnut,
236                            native (de)muxer exists [no]
237   --enable-libnpp          enable NVIDIA Performance Primitives-based code [no]
238   --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
239   --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
240   --enable-libopencv       enable video filtering via libopencv [no]
241   --enable-libopenh264     enable H.264 encoding via OpenH264 [no]
242   --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]
243   --enable-libopus         enable Opus de/encoding via libopus [no]
244   --enable-libpulse        enable Pulseaudio input via libpulse [no]
245   --enable-librubberband   enable rubberband needed for rubberband filter [no]
246   --enable-librtmp         enable RTMP[E] support via librtmp [no]
247   --enable-libschroedinger enable Dirac de/encoding via libschroedinger [no]
248   --enable-libshine        enable fixed-point MP3 encoding via libshine [no]
249   --enable-libsmbclient    enable Samba protocol via libsmbclient [no]
250   --enable-libsnappy       enable Snappy compression, needed for hap encoding [no]
251   --enable-libsoxr         enable Include libsoxr resampling [no]
252   --enable-libspeex        enable Speex de/encoding via libspeex [no]
253   --enable-libssh          enable SFTP protocol via libssh [no]
254   --enable-libtesseract    enable Tesseract, needed for ocr filter [no]
255   --enable-libtheora       enable Theora encoding via libtheora [no]
256   --enable-libtwolame      enable MP2 encoding via libtwolame [no]
257   --enable-libutvideo      enable Ut Video encoding and decoding via libutvideo [no]
258   --enable-libv4l2         enable libv4l2/v4l-utils [no]
259   --enable-libvidstab      enable video stabilization using vid.stab [no]
260   --enable-libvo-amrwbenc  enable AMR-WB encoding via libvo-amrwbenc [no]
261   --enable-libvorbis       enable Vorbis en/decoding via libvorbis,
262                            native implementation exists [no]
263   --enable-libvpx          enable VP8 and VP9 de/encoding via libvpx [no]
264   --enable-libwavpack      enable wavpack encoding via libwavpack [no]
265   --enable-libwebp         enable WebP encoding via libwebp [no]
266   --enable-libx264         enable H.264 encoding via x264 [no]
267   --enable-libx265         enable HEVC encoding via x265 [no]
268   --enable-libxavs         enable AVS encoding via xavs [no]
269   --enable-libxcb          enable X11 grabbing using XCB [autodetect]
270   --enable-libxcb-shm      enable X11 grabbing shm communication [autodetect]
271   --enable-libxcb-xfixes   enable X11 grabbing mouse rendering [autodetect]
272   --enable-libxcb-shape    enable X11 grabbing shape rendering [autodetect]
273   --enable-libxvid         enable Xvid encoding via xvidcore,
274                            native MPEG-4/Xvid encoder exists [no]
275   --enable-libzimg         enable z.lib, needed for zscale filter [no]
276   --enable-libzmq          enable message passing via libzmq [no]
277   --enable-libzvbi         enable teletext support via libzvbi [no]
278   --disable-lzma           disable lzma [autodetect]
279   --enable-decklink        enable Blackmagic DeckLink I/O support [no]
280   --enable-mediacodec      enable Android MediaCodec support [no]
281   --enable-mmal            enable decoding via MMAL [no]
282   --enable-netcdf          enable NetCDF, needed for sofalizer filter [no]
283   --enable-nvenc           enable NVIDIA NVENC support [no]
284   --enable-openal          enable OpenAL 1.1 capture support [no]
285   --enable-opencl          enable OpenCL code
286   --enable-opengl          enable OpenGL rendering [no]
287   --enable-openssl         enable openssl, needed for https support
288                            if gnutls is not used [no]
289   --disable-schannel       disable SChannel SSP, needed for TLS support on
290                            Windows if openssl and gnutls are not used [autodetect]
291   --disable-sdl            disable sdl [autodetect]
292   --disable-securetransport disable Secure Transport, needed for TLS support
293                            on OSX if openssl and gnutls are not used [autodetect]
294   --disable-videotoolbox   disable VideoToolbox code [autodetect]
295   --enable-x11grab         enable X11 grabbing (legacy) [no]
296   --disable-xlib           disable xlib [autodetect]
297   --disable-zlib           disable zlib [autodetect]
298
299 Toolchain options:
300   --arch=ARCH              select architecture [$arch]
301   --cpu=CPU                select the minimum required CPU (affects
302                            instruction selection, may crash on older CPUs)
303   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
304   --progs-suffix=SUFFIX    program name suffix []
305   --enable-cross-compile   assume a cross-compiler is used
306   --sysroot=PATH           root of cross-build tree
307   --sysinclude=PATH        location of cross-build system headers
308   --target-os=OS           compiler targets OS [$target_os]
309   --target-exec=CMD        command to run executables on target
310   --target-path=DIR        path to view of build directory on target
311   --target-samples=DIR     path to samples directory on target
312   --tempprefix=PATH        force fixed dir/prefix instead of mktemp for checks
313   --toolchain=NAME         set tool defaults according to NAME
314   --nm=NM                  use nm tool NM [$nm_default]
315   --ar=AR                  use archive tool AR [$ar_default]
316   --as=AS                  use assembler AS [$as_default]
317   --ln_s=LN_S              use symbolic link tool LN_S [$ln_s_default]
318   --strip=STRIP            use strip tool STRIP [$strip_default]
319   --windres=WINDRES        use windows resource compiler WINDRES [$windres_default]
320   --yasmexe=EXE            use yasm-compatible assembler EXE [$yasmexe_default]
321   --cc=CC                  use C compiler CC [$cc_default]
322   --cxx=CXX                use C compiler CXX [$cxx_default]
323   --objcc=OCC              use ObjC compiler OCC [$cc_default]
324   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
325   --ld=LD                  use linker LD [$ld_default]
326   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
327   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
328   --ranlib=RANLIB          use ranlib RANLIB [$ranlib_default]
329   --doxygen=DOXYGEN        use DOXYGEN to generate API doc [$doxygen_default]
330   --host-cc=HOSTCC         use host C compiler HOSTCC
331   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
332   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
333   --host-ld=HOSTLD         use host linker HOSTLD
334   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
335   --host-libs=HLIBS        use libs HLIBS when linking for host
336   --host-os=OS             compiler host OS [$target_os]
337   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
338   --extra-cxxflags=ECFLAGS add ECFLAGS to CXXFLAGS [$CXXFLAGS]
339   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
340   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
341   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
342   --extra-ldlibflags=ELDFLAGS add ELDFLAGS to LDLIBFLAGS [$LDLIBFLAGS]
343   --extra-libs=ELIBS       add ELIBS [$ELIBS]
344   --extra-version=STRING   version string suffix []
345   --optflags=OPTFLAGS      override optimization-related compiler flags
346   --build-suffix=SUFFIX    library name suffix []
347   --enable-pic             build position-independent code
348   --enable-thumb           compile for Thumb instruction set
349   --enable-lto             use link-time optimization
350   --env="ENV=override"     override the environment variables
351
352 Advanced options (experts only):
353   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
354   --custom-allocator=NAME  use a supported custom allocator
355   --disable-symver         disable symbol versioning
356   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
357   --disable-safe-bitstream-reader
358                            disable buffer boundary checking in bitreaders
359                            (faster, but may crash)
360   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
361   --sws-max-filter-size=N  the max filter size swscale uses [$sws_max_filter_size_default]
362
363 Optimization options (experts only):
364   --disable-asm            disable all assembly optimizations
365   --disable-altivec        disable AltiVec optimizations
366   --disable-vsx            disable VSX optimizations
367   --disable-power8         disable POWER8 optimizations
368   --disable-amd3dnow       disable 3DNow! optimizations
369   --disable-amd3dnowext    disable 3DNow! extended optimizations
370   --disable-mmx            disable MMX optimizations
371   --disable-mmxext         disable MMXEXT optimizations
372   --disable-sse            disable SSE optimizations
373   --disable-sse2           disable SSE2 optimizations
374   --disable-sse3           disable SSE3 optimizations
375   --disable-ssse3          disable SSSE3 optimizations
376   --disable-sse4           disable SSE4 optimizations
377   --disable-sse42          disable SSE4.2 optimizations
378   --disable-avx            disable AVX optimizations
379   --disable-xop            disable XOP optimizations
380   --disable-fma3           disable FMA3 optimizations
381   --disable-fma4           disable FMA4 optimizations
382   --disable-avx2           disable AVX2 optimizations
383   --disable-aesni          disable AESNI optimizations
384   --disable-armv5te        disable armv5te optimizations
385   --disable-armv6          disable armv6 optimizations
386   --disable-armv6t2        disable armv6t2 optimizations
387   --disable-vfp            disable VFP optimizations
388   --disable-neon           disable NEON optimizations
389   --disable-inline-asm     disable use of inline assembly
390   --disable-yasm           disable use of nasm/yasm assembly
391   --disable-mipsdsp        disable MIPS DSP ASE R1 optimizations
392   --disable-mipsdspr2      disable MIPS DSP ASE R2 optimizations
393   --disable-msa            disable MSA optimizations
394   --disable-mipsfpu        disable floating point MIPS optimizations
395   --disable-mmi            disable Loongson SIMD optimizations
396   --disable-fast-unaligned consider unaligned accesses slow
397
398 Developer options (useful when working on FFmpeg itself):
399   --disable-debug          disable debugging symbols
400   --enable-debug=LEVEL     set the debug level [$debuglevel]
401   --disable-optimizations  disable compiler optimizations
402   --enable-extra-warnings  enable more compiler warnings
403   --disable-stripping      disable stripping of executables and shared libraries
404   --assert-level=level     0(default), 1 or 2, amount of assertion testing,
405                            2 causes a slowdown at runtime.
406   --enable-memory-poisoning fill heap uninitialized allocated space with arbitrary data
407   --valgrind=VALGRIND      run "make fate" tests through valgrind to detect memory
408                            leaks and errors, using the specified valgrind binary.
409                            Cannot be combined with --target-exec
410   --enable-ftrapv          Trap arithmetic overflows
411   --samples=PATH           location of test samples for FATE, if not set use
412                            \$FATE_SAMPLES at make invocation time.
413   --enable-neon-clobber-test check NEON registers for clobbering (should be
414                            used only for debugging purposes)
415   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
416                            should be used only for debugging purposes)
417   --enable-random          randomly enable/disable components
418   --disable-random
419   --enable-random=LIST     randomly enable/disable specific components or
420   --disable-random=LIST    component groups. LIST is a comma-separated list
421                            of NAME[:PROB] entries where NAME is a component
422                            (group) and PROB the probability associated with
423                            NAME (default 0.5).
424   --random-seed=VALUE      seed value for --enable/disable-random
425   --disable-valgrind-backtrace do not print a backtrace under Valgrind
426                            (only applies to --disable-optimizations builds)
427
428 NOTE: Object files are built at the place where configure is launched.
429 EOF
430   exit 0
431 }
432
433 quotes='""'
434 if test -t 1 && which tput >/dev/null 2>&1; then
435     ncolors=$(tput colors)
436     if test -n "$ncolors" && test $ncolors -ge 8; then
437         bold_color=$(tput bold)
438         warn_color=$(tput setaf 3)
439         error_color=$(tput setaf 1)
440         reset_color=$(tput sgr0)
441     fi
442     # 72 used instead of 80 since that's the default of pr
443     ncols=$(tput cols)
444 fi
445 : ${ncols:=72}
446
447 log(){
448     echo "$@" >> $logfile
449 }
450
451 log_file(){
452     log BEGIN $1
453     pr -n -t $1 >> $logfile
454     log END $1
455 }
456
457 warn(){
458     log "WARNING: $*"
459     WARNINGS="${WARNINGS}WARNING: $*\n"
460 }
461
462 die(){
463     log "$@"
464     echo "$error_color$bold_color$@$reset_color"
465     cat <<EOF
466
467 If you think configure made a mistake, make sure you are using the latest
468 version from Git.  If the latest version fails, report the problem to the
469 ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
470 EOF
471     if disabled logging; then
472         cat <<EOF
473 Rerun configure with logging enabled (do not use --disable-logging), and
474 include the log this produces with your report.
475 EOF
476     else
477         cat <<EOF
478 Include the log file "$logfile" produced by configure as this will help
479 solve the problem.
480 EOF
481     fi
482     exit 1
483 }
484
485 # Avoid locale weirdness, besides we really just want to translate ASCII.
486 toupper(){
487     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
488 }
489
490 tolower(){
491     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
492 }
493
494 c_escape(){
495     echo "$*" | sed 's/["\\]/\\\0/g'
496 }
497
498 sh_quote(){
499     v=$(echo "$1" | sed "s/'/'\\\\''/g")
500     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
501     echo "$v"
502 }
503
504 cleanws(){
505     echo "$@" | sed 's/^ *//;s/[[:space:]][[:space:]]*/ /g;s/ *$//'
506 }
507
508 filter(){
509     pat=$1
510     shift
511     for v; do
512         eval "case $v in $pat) echo $v ;; esac"
513     done
514 }
515
516 filter_out(){
517     pat=$1
518     shift
519     for v; do
520         eval "case $v in $pat) ;; *) echo $v ;; esac"
521     done
522 }
523
524 map(){
525     m=$1
526     shift
527     for v; do eval $m; done
528 }
529
530 add_suffix(){
531     suffix=$1
532     shift
533     for v; do echo ${v}${suffix}; done
534 }
535
536 set_all(){
537     value=$1
538     shift
539     for var in $*; do
540         eval $var=$value
541     done
542 }
543
544 set_weak(){
545     value=$1
546     shift
547     for var; do
548         eval : \${$var:=$value}
549     done
550 }
551
552 sanitize_var_name(){
553     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
554 }
555
556 set_safe(){
557     var=$1
558     shift
559     eval $(sanitize_var_name "$var")='$*'
560 }
561
562 get_safe(){
563     eval echo \$$(sanitize_var_name "$1")
564 }
565
566 pushvar(){
567     for pvar in $*; do
568         eval level=\${${pvar}_level:=0}
569         eval ${pvar}_${level}="\$$pvar"
570         eval ${pvar}_level=$(($level+1))
571     done
572 }
573
574 popvar(){
575     for pvar in $*; do
576         eval level=\${${pvar}_level:-0}
577         test $level = 0 && continue
578         eval level=$(($level-1))
579         eval $pvar="\${${pvar}_${level}}"
580         eval ${pvar}_level=$level
581         eval unset ${pvar}_${level}
582     done
583 }
584
585 enable(){
586     set_all yes $*
587 }
588
589 disable(){
590     set_all no $*
591 }
592
593 enable_weak(){
594     set_weak yes $*
595 }
596
597 disable_weak(){
598     set_weak no $*
599 }
600
601 enable_safe(){
602     for var; do
603         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
604     done
605 }
606
607 disable_safe(){
608     for var; do
609         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
610     done
611 }
612
613 do_enable_deep(){
614     for var; do
615         enabled $var && continue
616         eval sel="\$${var}_select"
617         eval sgs="\$${var}_suggest"
618         pushvar var sgs
619         enable_deep $sel
620         popvar sgs
621         enable_deep_weak $sgs
622         popvar var
623     done
624 }
625
626 enable_deep(){
627     do_enable_deep $*
628     enable $*
629 }
630
631 enable_deep_weak(){
632     for var; do
633         disabled $var && continue
634         pushvar var
635         do_enable_deep $var
636         popvar var
637         enable_weak $var
638     done
639 }
640
641 enabled(){
642     test "${1#!}" = "$1" && op='=' || op=!=
643     eval test "x\$${1#!}" $op "xyes"
644 }
645
646 disabled(){
647     test "${1#!}" = "$1" && op='=' || op=!=
648     eval test "x\$${1#!}" $op "xno"
649 }
650
651 enabled_all(){
652     for opt; do
653         enabled $opt || return 1
654     done
655 }
656
657 disabled_all(){
658     for opt; do
659         disabled $opt || return 1
660     done
661 }
662
663 enabled_any(){
664     for opt; do
665         enabled $opt && return 0
666     done
667 }
668
669 disabled_any(){
670     for opt; do
671         disabled $opt && return 0
672     done
673     return 1
674 }
675
676 set_default(){
677     for opt; do
678         eval : \${$opt:=\$${opt}_default}
679     done
680 }
681
682 is_in(){
683     value=$1
684     shift
685     for var in $*; do
686         [ $var = $value ] && return 0
687     done
688     return 1
689 }
690
691 do_check_deps(){
692     for cfg; do
693         cfg="${cfg#!}"
694         enabled ${cfg}_checking && die "Circular dependency for $cfg."
695         disabled ${cfg}_checking && continue
696         enable ${cfg}_checking
697         append allopts $cfg
698
699         eval dep_all="\$${cfg}_deps"
700         eval dep_any="\$${cfg}_deps_any"
701         eval dep_sel="\$${cfg}_select"
702         eval dep_sgs="\$${cfg}_suggest"
703         eval dep_ifa="\$${cfg}_if"
704         eval dep_ifn="\$${cfg}_if_any"
705
706         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
707         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
708         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
709
710         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
711         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
712         enabled_all  $dep_all || disable $cfg
713         enabled_any  $dep_any || disable $cfg
714         disabled_any $dep_sel && disable $cfg
715
716         if enabled $cfg; then
717             enable_deep $dep_sel
718             enable_deep_weak $dep_sgs
719         fi
720
721         disable ${cfg}_checking
722     done
723 }
724
725 check_deps(){
726     unset allopts
727
728     do_check_deps "$@"
729
730     for cfg in $allopts; do
731         enabled $cfg || continue
732         eval dep_extralibs="\$${cfg}_extralibs"
733         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
734     done
735 }
736
737 print_config(){
738     pfx=$1
739     files=$2
740     shift 2
741     map 'eval echo "$v \${$v:-no}"' "$@" |
742     awk "BEGIN { split(\"$files\", files) }
743         {
744             c = \"$pfx\" toupper(\$1);
745             v = \$2;
746             sub(/yes/, 1, v);
747             sub(/no/,  0, v);
748             for (f in files) {
749                 file = files[f];
750                 if (file ~ /\\.h\$/) {
751                     printf(\"#define %s %d\\n\", c, v) >>file;
752                 } else if (file ~ /\\.asm\$/) {
753                     printf(\"%%define %s %d\\n\", c, v) >>file;
754                 } else if (file ~ /\\.mak\$/) {
755                     n = -v ? \"\" : \"!\";
756                     printf(\"%s%s=yes\\n\", n, c) >>file;
757                 } else if (file ~ /\\.texi\$/) {
758                     pre = -v ? \"\" : \"@c \";
759                     yesno = \$2;
760                     c2 = tolower(c);
761                     gsub(/_/, \"-\", c2);
762                     printf(\"%s@set %s %s\\n\", pre, c2, yesno) >>file;
763                 }
764             }
765         }"
766 }
767
768 print_enabled(){
769     suf=$1
770     shift
771     for v; do
772         enabled $v && printf "%s\n" ${v%$suf};
773     done
774 }
775
776 append(){
777     var=$1
778     shift
779     eval "$var=\"\$$var $*\""
780 }
781
782 prepend(){
783     var=$1
784     shift
785     eval "$var=\"$* \$$var\""
786 }
787
788 unique(){
789     var=$1
790     uniq_list=""
791     for tok in $(eval echo \$$var); do
792         uniq_list="$(filter_out $tok $uniq_list) $tok"
793     done
794     eval "$var=\"${uniq_list}\""
795 }
796
797 add_cppflags(){
798     append CPPFLAGS "$@"
799 }
800
801 add_cflags(){
802     append CFLAGS $($cflags_filter "$@")
803 }
804
805 add_cxxflags(){
806     append CXXFLAGS $($cflags_filter "$@")
807 }
808
809 add_asflags(){
810     append ASFLAGS $($asflags_filter "$@")
811 }
812
813 add_objcflags(){
814     append OBJCFLAGS $($objcflags_filter "$@")
815 }
816
817 add_ldflags(){
818     append LDFLAGS $($ldflags_filter "$@")
819 }
820
821 add_ldexeflags(){
822     append LDEXEFLAGS $($ldflags_filter "$@")
823 }
824
825 add_ldlibflags(){
826     append LDLIBFLAGS $($ldflags_filter "$@")
827 }
828
829 add_stripflags(){
830     append ASMSTRIPFLAGS "$@"
831 }
832
833 add_extralibs(){
834     prepend extralibs $($ldflags_filter "$@")
835 }
836
837 add_host_cppflags(){
838     append host_cppflags "$@"
839 }
840
841 add_host_cflags(){
842     append host_cflags $($host_cflags_filter "$@")
843 }
844
845 add_host_ldflags(){
846     append host_ldflags $($host_ldflags_filter "$@")
847 }
848
849 add_compat(){
850     append compat_objs $1
851     shift
852     map 'add_cppflags -D$v' "$@"
853 }
854
855 check_cmd(){
856     log "$@"
857     "$@" >> $logfile 2>&1
858 }
859
860 check_stat(){
861     log check_stat "$@"
862     stat "$1" >> $logfile 2>&1
863 }
864
865 cc_o(){
866     eval printf '%s\\n' $CC_O
867 }
868
869 cc_e(){
870     eval printf '%s\\n' $CC_E
871 }
872
873 check_cc(){
874     log check_cc "$@"
875     cat > $TMPC
876     log_file $TMPC
877     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
878 }
879
880 check_cxx(){
881     log check_cxx "$@"
882     cat > $TMPCPP
883     log_file $TMPCPP
884     check_cmd $cxx $CPPFLAGS $CFLAGS $CXXFLAGS "$@" $CXX_C -o $TMPO $TMPCPP
885 }
886
887 check_objcc(){
888     log check_objcc "$@"
889     cat > $TMPM
890     log_file $TMPM
891     check_cmd $objcc -Werror=missing-prototypes $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPM
892 }
893
894 check_cpp(){
895     log check_cpp "$@"
896     cat > $TMPC
897     log_file $TMPC
898     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
899 }
900
901 as_o(){
902     eval printf '%s\\n' $AS_O
903 }
904
905 check_as(){
906     log check_as "$@"
907     cat > $TMPS
908     log_file $TMPS
909     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
910 }
911
912 check_inline_asm(){
913     log check_inline_asm "$@"
914     name="$1"
915     code="$2"
916     shift 2
917     disable $name
918     check_cc "$@" <<EOF && enable $name
919 void foo(void){ __asm__ volatile($code); }
920 EOF
921 }
922
923 check_inline_asm_flags(){
924     log check_inline_asm_flags "$@"
925     name="$1"
926     code="$2"
927     flags=''
928     shift 2
929     while [ "$1" != "" ]; do
930       append flags $1
931       shift
932     done;
933     disable $name
934     cat > $TMPC <<EOF
935 void foo(void){ __asm__ volatile($code); }
936 EOF
937     log_file $TMPC
938     check_cmd $cc $CPPFLAGS $CFLAGS $flags "$@" $CC_C $(cc_o $TMPO) $TMPC &&
939     enable $name && add_cflags $flags && add_asflags $flags && add_ldflags $flags
940 }
941
942 check_insn(){
943     log check_insn "$@"
944     check_inline_asm ${1}_inline "\"$2\""
945     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
946 }
947
948 check_yasm(){
949     log check_yasm "$@"
950     echo "$1" > $TMPS
951     log_file $TMPS
952     shift 1
953     check_cmd $yasmexe $YASMFLAGS -Werror "$@" -o $TMPO $TMPS
954 }
955
956 ld_o(){
957     eval printf '%s\\n' $LD_O
958 }
959
960 check_ld(){
961     log check_ld "$@"
962     type=$1
963     shift 1
964     flags=$(filter_out '-l*|*.so' $@)
965     libs=$(filter '-l*|*.so' $@)
966     check_$type $($cflags_filter $flags) || return
967     flags=$($ldflags_filter $flags)
968     libs=$($ldflags_filter $libs)
969     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
970 }
971
972 print_include(){
973     hdr=$1
974     test "${hdr%.h}" = "${hdr}" &&
975         echo "#include $hdr"    ||
976         echo "#include <$hdr>"
977 }
978
979 check_code(){
980     log check_code "$@"
981     check=$1
982     headers=$2
983     code=$3
984     shift 3
985     {
986         for hdr in $headers; do
987             print_include $hdr
988         done
989         echo "int main(void) { $code; return 0; }"
990     } | check_$check "$@"
991 }
992
993 check_cppflags(){
994     log check_cppflags "$@"
995     check_cc "$@" <<EOF && append CPPFLAGS "$@"
996 int x;
997 EOF
998 }
999
1000 test_cflags(){
1001     log test_cflags "$@"
1002     set -- $($cflags_filter "$@")
1003     check_cc "$@" <<EOF
1004 int x;
1005 EOF
1006 }
1007
1008 check_cflags(){
1009     log check_cflags "$@"
1010     test_cflags "$@" && add_cflags "$@"
1011 }
1012
1013 check_cxxflags(){
1014     log check_cxxflags "$@"
1015     set -- $($cflags_filter "$@")
1016     check_cxx "$@" <<EOF && append CXXFLAGS "$@"
1017 int x;
1018 EOF
1019 }
1020
1021 test_objcflags(){
1022     log test_cflags "$@"
1023     set -- $($cflags_filter "$@")
1024     check_objcc "$@" <<EOF
1025 int x;
1026 EOF
1027 }
1028
1029 check_objcflags(){
1030     log check_cflags "$@"
1031     test_objcflags "$@" && add_objcflags "$@"
1032 }
1033
1034 test_ldflags(){
1035     log test_ldflags "$@"
1036     check_ld "cc" "$@" <<EOF
1037 int main(void){ return 0; }
1038 EOF
1039 }
1040
1041 check_ldflags(){
1042     log check_ldflags "$@"
1043     test_ldflags "$@" && add_ldflags "$@"
1044 }
1045
1046 test_stripflags(){
1047     log test_stripflags "$@"
1048     # call check_cc to get a fresh TMPO
1049     check_cc <<EOF
1050 int main(void) { return 0; }
1051 EOF
1052     check_cmd $strip $ASMSTRIPFLAGS "$@" $TMPO
1053 }
1054
1055 check_stripflags(){
1056     log check_stripflags "$@"
1057     test_stripflags "$@" && add_stripflags "$@"
1058 }
1059
1060 check_header(){
1061     log check_header "$@"
1062     header=$1
1063     shift
1064     disable_safe $header
1065     check_cpp "$@" <<EOF && enable_safe $header
1066 #include <$header>
1067 int x;
1068 EOF
1069 }
1070
1071 check_header_objcc(){
1072     log check_header_objcc "$@"
1073     rm -f -- "$TMPO"
1074     header=$1
1075     shift
1076     disable_safe $header
1077     {
1078        echo "#include <$header>"
1079        echo "int main(void) { return 0; }"
1080     } | check_objcc && check_stat "$TMPO" && enable_safe $headers
1081 }
1082
1083 check_func(){
1084     log check_func "$@"
1085     func=$1
1086     shift
1087     disable $func
1088     check_ld "cc" "$@" <<EOF && enable $func
1089 extern int $func();
1090 int main(void){ $func(); }
1091 EOF
1092 }
1093
1094 check_complexfunc(){
1095     log check_complexfunc "$@"
1096     func=$1
1097     narg=$2
1098     shift 2
1099     test $narg = 2 && args="f, g" || args="f * I"
1100     disable $func
1101     check_ld "cc" "$@" <<EOF && enable $func
1102 #include <complex.h>
1103 #include <math.h>
1104 float foo(complex float f, complex float g) { return $func($args); }
1105 int main(void){ return (int) foo; }
1106 EOF
1107 }
1108
1109 check_mathfunc(){
1110     log check_mathfunc "$@"
1111     func=$1
1112     narg=$2
1113     shift 2
1114     test $narg = 2 && args="f, g" || args="f"
1115     disable $func
1116     check_ld "cc" "$@" <<EOF && enable $func
1117 #include <math.h>
1118 float foo(float f, float g) { return $func($args); }
1119 int main(void){ return (int) foo; }
1120 EOF
1121 }
1122
1123 check_func_headers(){
1124     log check_func_headers "$@"
1125     headers=$1
1126     funcs=$2
1127     shift 2
1128     {
1129         for hdr in $headers; do
1130             print_include $hdr
1131         done
1132         for func in $funcs; do
1133             echo "long check_$func(void) { return (long) $func; }"
1134         done
1135         echo "int main(void) { return 0; }"
1136     } | check_ld "cc" "$@" && enable $funcs && enable_safe $headers
1137 }
1138
1139 check_class_headers_cpp(){
1140     log check_class_headers_cpp "$@"
1141     headers=$1
1142     classes=$2
1143     shift 2
1144     {
1145         for hdr in $headers; do
1146             echo "#include <$hdr>"
1147         done
1148         echo "int main(void) { "
1149         i=1
1150         for class in $classes; do
1151             echo "$class obj$i;"
1152             i=$(expr $i + 1)
1153         done
1154         echo "return 0; }"
1155     } | check_ld "cxx" "$@" && enable $funcs && enable_safe $headers
1156 }
1157
1158 check_cpp_condition(){
1159     log check_cpp_condition "$@"
1160     header=$1
1161     condition=$2
1162     shift 2
1163     check_cpp "$@" <<EOF
1164 #include <$header>
1165 #if !($condition)
1166 #error "unsatisfied condition: $condition"
1167 #endif
1168 EOF
1169 }
1170
1171 check_lib(){
1172     log check_lib "$@"
1173     header="$1"
1174     func="$2"
1175     shift 2
1176     check_header $header && check_func $func "$@" && add_extralibs "$@"
1177 }
1178
1179 check_lib2(){
1180     log check_lib2 "$@"
1181     headers="$1"
1182     funcs="$2"
1183     shift 2
1184     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
1185 }
1186
1187 check_lib_cpp(){
1188     log check_lib_cpp "$@"
1189     headers="$1"
1190     classes="$2"
1191     shift 2
1192     check_class_headers_cpp "$headers" "$classes" "$@" && add_extralibs "$@"
1193 }
1194
1195 check_pkg_config(){
1196     log check_pkg_config "$@"
1197     pkgandversion="$1"
1198     pkg="${1%% *}"
1199     headers="$2"
1200     funcs="$3"
1201     shift 3
1202     check_cmd $pkg_config --exists --print-errors $pkgandversion || return
1203     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1204     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1205     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1206         set_safe "${pkg}_cflags" $pkg_cflags   &&
1207         set_safe "${pkg}_libs"   $pkg_libs
1208 }
1209
1210 check_exec(){
1211     check_ld "cc" "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1212 }
1213
1214 check_exec_crash(){
1215     code=$(cat)
1216
1217     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1218     # are safe but may not be available everywhere.  Thus we use
1219     # raise(SIGTERM) instead.  The check is run in a subshell so we
1220     # can redirect the "Terminated" message from the shell.  SIGBUS
1221     # is not defined by standard C so it is used conditionally.
1222
1223     (check_exec "$@") >> $logfile 2>&1 <<EOF
1224 #include <signal.h>
1225 static void sighandler(int sig){
1226     raise(SIGTERM);
1227 }
1228 int foo(void){
1229     $code
1230 }
1231 int (*func_ptr)(void) = foo;
1232 int main(void){
1233     signal(SIGILL, sighandler);
1234     signal(SIGFPE, sighandler);
1235     signal(SIGSEGV, sighandler);
1236 #ifdef SIGBUS
1237     signal(SIGBUS, sighandler);
1238 #endif
1239     return func_ptr();
1240 }
1241 EOF
1242 }
1243
1244 check_type(){
1245     log check_type "$@"
1246     headers=$1
1247     type=$2
1248     shift 2
1249     disable_safe "$type"
1250     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1251 }
1252
1253 check_struct(){
1254     log check_struct "$@"
1255     headers=$1
1256     struct=$2
1257     member=$3
1258     shift 3
1259     disable_safe "${struct}_${member}"
1260     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1261         enable_safe "${struct}_${member}"
1262 }
1263
1264 check_builtin(){
1265     log check_builtin "$@"
1266     name=$1
1267     headers=$2
1268     builtin=$3
1269     shift 3
1270     disable "$name"
1271     check_code ld "$headers" "$builtin" "cc" "$@" && enable "$name"
1272 }
1273
1274 check_compile_assert(){
1275     log check_compile_assert "$@"
1276     name=$1
1277     headers=$2
1278     condition=$3
1279     shift 3
1280     disable "$name"
1281     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1282 }
1283
1284 require(){
1285     name="$1"
1286     header="$2"
1287     func="$3"
1288     shift 3
1289     check_lib $header $func "$@" || die "ERROR: $name not found"
1290 }
1291
1292 require2(){
1293     name="$1"
1294     headers="$2"
1295     func="$3"
1296     shift 3
1297     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1298 }
1299
1300 require_cpp(){
1301     name="$1"
1302     headers="$2"
1303     classes="$3"
1304     shift 3
1305     check_lib_cpp "$headers" "$classes" "$@" || die "ERROR: $name not found"
1306 }
1307
1308 use_pkg_config(){
1309     pkg="$1"
1310     check_pkg_config "$@" || return 1
1311     add_cflags    $(get_safe "${pkg}_cflags")
1312     add_extralibs $(get_safe "${pkg}_libs")
1313 }
1314
1315 require_pkg_config(){
1316     use_pkg_config "$@" || die "ERROR: $pkg not found using pkg-config$pkg_config_fail_message"
1317 }
1318
1319 require_libfreetype(){
1320     log require_libfreetype "$@"
1321     pkg="freetype2"
1322     check_cmd $pkg_config --exists --print-errors $pkg \
1323       || die "ERROR: $pkg not found"
1324     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1325     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1326     {
1327         echo "#include <ft2build.h>"
1328         echo "#include FT_FREETYPE_H"
1329         echo "long check_func(void) { return (long) FT_Init_FreeType; }"
1330         echo "int main(void) { return 0; }"
1331     } | check_ld "cc" $pkg_cflags $pkg_libs \
1332       && set_safe "${pkg}_cflags" $pkg_cflags \
1333       && set_safe "${pkg}_libs"   $pkg_libs \
1334       || die "ERROR: $pkg not found"
1335     add_cflags    $(get_safe "${pkg}_cflags")
1336     add_extralibs $(get_safe "${pkg}_libs")
1337 }
1338
1339 hostcc_e(){
1340     eval printf '%s\\n' $HOSTCC_E
1341 }
1342
1343 hostcc_o(){
1344     eval printf '%s\\n' $HOSTCC_O
1345 }
1346
1347 check_host_cc(){
1348     log check_host_cc "$@"
1349     cat > $TMPC
1350     log_file $TMPC
1351     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1352 }
1353
1354 check_host_cpp(){
1355     log check_host_cpp "$@"
1356     cat > $TMPC
1357     log_file $TMPC
1358     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1359 }
1360
1361 check_host_cppflags(){
1362     log check_host_cppflags "$@"
1363     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1364 int x;
1365 EOF
1366 }
1367
1368 check_host_cflags(){
1369     log check_host_cflags "$@"
1370     set -- $($host_cflags_filter "$@")
1371     check_host_cc "$@" <<EOF && append host_cflags "$@"
1372 int x;
1373 EOF
1374 }
1375
1376 check_host_cpp_condition(){
1377     log check_host_cpp_condition "$@"
1378     header=$1
1379     condition=$2
1380     shift 2
1381     check_host_cpp "$@" <<EOF
1382 #include <$header>
1383 #if !($condition)
1384 #error "unsatisfied condition: $condition"
1385 #endif
1386 EOF
1387 }
1388
1389 cp_if_changed(){
1390     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1391     mkdir -p "$(dirname $2)"
1392     $cp_f "$1" "$2"
1393 }
1394
1395 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1396 # system-dependent things.
1397
1398 AVCODEC_COMPONENTS="
1399     bsfs
1400     decoders
1401     encoders
1402     hwaccels
1403     parsers
1404 "
1405
1406 AVDEVICE_COMPONENTS="
1407     indevs
1408     outdevs
1409 "
1410 AVFILTER_COMPONENTS="
1411     filters
1412 "
1413 AVFORMAT_COMPONENTS="
1414     demuxers
1415     muxers
1416     protocols
1417 "
1418
1419 AVRESAMPLE_COMPONENTS=""
1420 AVUTIL_COMPONENTS=""
1421
1422 COMPONENT_LIST="
1423     $AVCODEC_COMPONENTS
1424     $AVDEVICE_COMPONENTS
1425     $AVFILTER_COMPONENTS
1426     $AVFORMAT_COMPONENTS
1427     $AVRESAMPLE_COMPONENTS
1428     $AVUTIL_COMPONENTS
1429 "
1430
1431 EXAMPLE_LIST="
1432     avio_reading_example
1433     avio_dir_cmd_example
1434     decoding_encoding_example
1435     demuxing_decoding_example
1436     extract_mvs_example
1437     filter_audio_example
1438     filtering_audio_example
1439     filtering_video_example
1440     metadata_example
1441     muxing_example
1442     qsvdec_example
1443     remuxing_example
1444     resampling_audio_example
1445     scaling_video_example
1446     transcode_aac_example
1447     transcoding_example
1448 "
1449
1450 EXTERNAL_LIBRARY_LIST="
1451     audiotoolbox
1452     avisynth
1453     bzlib
1454     chromaprint
1455     crystalhd
1456     cuda
1457     decklink
1458     frei0r
1459     gcrypt
1460     gmp
1461     gnutls
1462     iconv
1463     jni
1464     ladspa
1465     libass
1466     libbluray
1467     libbs2b
1468     libcaca
1469     libcdio
1470     libcelt
1471     libdc1394
1472     libfaac
1473     libfdk_aac
1474     libflite
1475     libfontconfig
1476     libfreetype
1477     libfribidi
1478     libgme
1479     libgsm
1480     libiec61883
1481     libilbc
1482     libkvazaar
1483     libmfx
1484     libmodplug
1485     libmp3lame
1486     libnut
1487     libnpp
1488     libopencore_amrnb
1489     libopencore_amrwb
1490     libopencv
1491     libopenh264
1492     libopenjpeg
1493     libopus
1494     libpulse
1495     librtmp
1496     librubberband
1497     libschroedinger
1498     libshine
1499     libsmbclient
1500     libsnappy
1501     libsoxr
1502     libspeex
1503     libssh
1504     libtesseract
1505     libtheora
1506     libtwolame
1507     libutvideo
1508     libv4l2
1509     libvidstab
1510     libvo_amrwbenc
1511     libvorbis
1512     libvpx
1513     libwavpack
1514     libwebp
1515     libx264
1516     libx265
1517     libxavs
1518     libxcb
1519     libxcb_shm
1520     libxcb_shape
1521     libxcb_xfixes
1522     libxvid
1523     libzimg
1524     libzmq
1525     libzvbi
1526     lzma
1527     mediacodec
1528     mmal
1529     netcdf
1530     nvenc
1531     openal
1532     opencl
1533     opengl
1534     openssl
1535     schannel
1536     sdl
1537     securetransport
1538     videotoolbox
1539     x11grab
1540     xlib
1541     zlib
1542 "
1543
1544 DOCUMENT_LIST="
1545     doc
1546     htmlpages
1547     manpages
1548     podpages
1549     txtpages
1550 "
1551
1552 FEATURE_LIST="
1553     ftrapv
1554     gray
1555     hardcoded_tables
1556     runtime_cpudetect
1557     safe_bitstream_reader
1558     shared
1559     small
1560     static
1561     swscale_alpha
1562 "
1563
1564 HWACCEL_LIST="
1565     d3d11va
1566     dxva2
1567     vaapi
1568     vda
1569     vdpau
1570     videotoolbox_hwaccel
1571     xvmc
1572 "
1573
1574 LIBRARY_LIST="
1575     avcodec
1576     avdevice
1577     avfilter
1578     avformat
1579     avresample
1580     avutil
1581     postproc
1582     swresample
1583     swscale
1584 "
1585
1586 LICENSE_LIST="
1587     gpl
1588     nonfree
1589     version3
1590 "
1591
1592 PROGRAM_LIST="
1593     ffplay
1594     ffprobe
1595     ffserver
1596     ffmpeg
1597 "
1598
1599 SUBSYSTEM_LIST="
1600     dct
1601     dwt
1602     error_resilience
1603     faan
1604     fast_unaligned
1605     fft
1606     lsp
1607     lzo
1608     mdct
1609     pixelutils
1610     network
1611     rdft
1612 "
1613
1614 CONFIG_LIST="
1615     $COMPONENT_LIST
1616     $DOCUMENT_LIST
1617     $EXAMPLE_LIST
1618     $EXTERNAL_LIBRARY_LIST
1619     $FEATURE_LIST
1620     $HWACCEL_LIST
1621     $LICENSE_LIST
1622     $LIBRARY_LIST
1623     $PROGRAM_LIST
1624     $SUBSYSTEM_LIST
1625     fontconfig
1626     incompatible_libav_abi
1627     memalign_hack
1628     memory_poisoning
1629     neon_clobber_test
1630     pic
1631     pod2man
1632     raise_major
1633     thumb
1634     valgrind_backtrace
1635     xmm_clobber_test
1636 "
1637
1638 THREADS_LIST="
1639     pthreads
1640     os2threads
1641     w32threads
1642 "
1643
1644 ATOMICS_LIST="
1645     atomics_gcc
1646     atomics_suncc
1647     atomics_win32
1648 "
1649
1650 ARCH_LIST="
1651     aarch64
1652     alpha
1653     arm
1654     avr32
1655     avr32_ap
1656     avr32_uc
1657     bfin
1658     ia64
1659     m68k
1660     mips
1661     mips64
1662     parisc
1663     ppc
1664     ppc64
1665     s390
1666     sh4
1667     sparc
1668     sparc64
1669     tilegx
1670     tilepro
1671     tomi
1672     x86
1673     x86_32
1674     x86_64
1675 "
1676
1677 ARCH_EXT_LIST_ARM="
1678     armv5te
1679     armv6
1680     armv6t2
1681     armv8
1682     neon
1683     vfp
1684     vfpv3
1685     setend
1686 "
1687
1688 ARCH_EXT_LIST_MIPS="
1689     mipsfpu
1690     mips32r2
1691     mips32r5
1692     mips64r2
1693     mips32r6
1694     mips64r6
1695     mipsdsp
1696     mipsdspr2
1697     msa
1698 "
1699
1700 ARCH_EXT_LIST_LOONGSON="
1701     loongson2
1702     loongson3
1703     mmi
1704 "
1705
1706 ARCH_EXT_LIST_X86_SIMD="
1707     aesni
1708     amd3dnow
1709     amd3dnowext
1710     avx
1711     avx2
1712     fma3
1713     fma4
1714     mmx
1715     mmxext
1716     sse
1717     sse2
1718     sse3
1719     sse4
1720     sse42
1721     ssse3
1722     xop
1723 "
1724
1725 ARCH_EXT_LIST_PPC="
1726     altivec
1727     dcbzl
1728     ldbrx
1729     power8
1730     ppc4xx
1731     vsx
1732 "
1733
1734 ARCH_EXT_LIST_X86="
1735     $ARCH_EXT_LIST_X86_SIMD
1736     cpunop
1737     i686
1738 "
1739
1740 ARCH_EXT_LIST="
1741     $ARCH_EXT_LIST_ARM
1742     $ARCH_EXT_LIST_PPC
1743     $ARCH_EXT_LIST_X86
1744     $ARCH_EXT_LIST_MIPS
1745     $ARCH_EXT_LIST_LOONGSON
1746 "
1747
1748 ARCH_FEATURES="
1749     aligned_stack
1750     fast_64bit
1751     fast_clz
1752     fast_cmov
1753     local_aligned_8
1754     local_aligned_16
1755     local_aligned_32
1756     simd_align_16
1757 "
1758
1759 BUILTIN_LIST="
1760     atomic_cas_ptr
1761     atomic_compare_exchange
1762     machine_rw_barrier
1763     MemoryBarrier
1764     mm_empty
1765     rdtsc
1766     sarestart
1767     sem_timedwait
1768     sync_val_compare_and_swap
1769 "
1770 HAVE_LIST_CMDLINE="
1771     inline_asm
1772     symver
1773     yasm
1774 "
1775
1776 HAVE_LIST_PUB="
1777     bigendian
1778     fast_unaligned
1779     incompatible_libav_abi
1780 "
1781
1782 HEADERS_LIST="
1783     alsa_asoundlib_h
1784     altivec_h
1785     arpa_inet_h
1786     asm_types_h
1787     cdio_paranoia_h
1788     cdio_paranoia_paranoia_h
1789     dispatch_dispatch_h
1790     dev_bktr_ioctl_bt848_h
1791     dev_bktr_ioctl_meteor_h
1792     dev_ic_bt8xx_h
1793     dev_video_bktr_ioctl_bt848_h
1794     dev_video_meteor_ioctl_meteor_h
1795     direct_h
1796     dirent_h
1797     dlfcn_h
1798     d3d11_h
1799     dxva_h
1800     ES2_gl_h
1801     gsm_h
1802     io_h
1803     mach_mach_time_h
1804     machine_ioctl_bt848_h
1805     machine_ioctl_meteor_h
1806     malloc_h
1807     opencv2_core_core_c_h
1808     openjpeg_2_1_openjpeg_h
1809     openjpeg_2_0_openjpeg_h
1810     openjpeg_1_5_openjpeg_h
1811     OpenGL_gl3_h
1812     poll_h
1813     sndio_h
1814     soundcard_h
1815     sys_mman_h
1816     sys_param_h
1817     sys_resource_h
1818     sys_select_h
1819     sys_soundcard_h
1820     sys_time_h
1821     sys_un_h
1822     sys_videoio_h
1823     termios_h
1824     udplite_h
1825     unistd_h
1826     valgrind_valgrind_h
1827     windows_h
1828     winsock2_h
1829 "
1830
1831 INTRINSICS_LIST="
1832     intrinsics_neon
1833 "
1834
1835 COMPLEX_FUNCS="
1836     cabs
1837     cexp
1838 "
1839
1840 MATH_FUNCS="
1841     atanf
1842     atan2f
1843     cbrt
1844     cbrtf
1845     copysign
1846     cosf
1847     erf
1848     exp2
1849     exp2f
1850     expf
1851     hypot
1852     isfinite
1853     isinf
1854     isnan
1855     ldexpf
1856     llrint
1857     llrintf
1858     log2
1859     log2f
1860     log10f
1861     lrint
1862     lrintf
1863     powf
1864     rint
1865     round
1866     roundf
1867     sinf
1868     trunc
1869     truncf
1870 "
1871
1872 SYSTEM_FUNCS="
1873     access
1874     aligned_malloc
1875     arc4random
1876     clock_gettime
1877     closesocket
1878     CommandLineToArgvW
1879     CoTaskMemFree
1880     CryptGenRandom
1881     dlopen
1882     fcntl
1883     flt_lim
1884     fork
1885     getaddrinfo
1886     gethrtime
1887     getopt
1888     GetProcessAffinityMask
1889     GetProcessMemoryInfo
1890     GetProcessTimes
1891     getrusage
1892     GetSystemTimeAsFileTime
1893     gettimeofday
1894     glob
1895     glXGetProcAddress
1896     gmtime_r
1897     inet_aton
1898     isatty
1899     jack_port_get_latency_range
1900     kbhit
1901     localtime_r
1902     lstat
1903     lzo1x_999_compress
1904     mach_absolute_time
1905     MapViewOfFile
1906     memalign
1907     mkstemp
1908     mmap
1909     mprotect
1910     nanosleep
1911     PeekNamedPipe
1912     posix_memalign
1913     pthread_cancel
1914     sched_getaffinity
1915     SetConsoleTextAttribute
1916     SetConsoleCtrlHandler
1917     setmode
1918     setrlimit
1919     Sleep
1920     strerror_r
1921     sysconf
1922     sysctl
1923     usleep
1924     UTGetOSTypeFromString
1925     VirtualAlloc
1926     wglGetProcAddress
1927 "
1928
1929 TOOLCHAIN_FEATURES="
1930     as_dn_directive
1931     as_func
1932     as_object_arch
1933     asm_mod_q
1934     attribute_may_alias
1935     attribute_packed
1936     ebp_available
1937     ebx_available
1938     gnu_as
1939     gnu_windres
1940     ibm_asm
1941     inline_asm_direct_symbol_refs
1942     inline_asm_labels
1943     inline_asm_nonlocal_labels
1944     pragma_deprecated
1945     rsync_contimeout
1946     symver_asm_label
1947     symver_gnu_asm
1948     vfp_args
1949     xform_asm
1950     xmm_clobbers
1951 "
1952
1953 TYPES_LIST="
1954     CONDITION_VARIABLE_Ptr
1955     socklen_t
1956     struct_addrinfo
1957     struct_group_source_req
1958     struct_ip_mreq_source
1959     struct_ipv6_mreq
1960     struct_msghdr_msg_flags
1961     struct_pollfd
1962     struct_rusage_ru_maxrss
1963     struct_sctp_event_subscribe
1964     struct_sockaddr_in6
1965     struct_sockaddr_sa_len
1966     struct_sockaddr_storage
1967     struct_stat_st_mtim_tv_nsec
1968     struct_v4l2_frmivalenum_discrete
1969 "
1970
1971 HAVE_LIST="
1972     $ARCH_EXT_LIST
1973     $(add_suffix _external $ARCH_EXT_LIST)
1974     $(add_suffix _inline   $ARCH_EXT_LIST)
1975     $ARCH_FEATURES
1976     $ATOMICS_LIST
1977     $BUILTIN_LIST
1978     $COMPLEX_FUNCS
1979     $HAVE_LIST_CMDLINE
1980     $HAVE_LIST_PUB
1981     $HEADERS_LIST
1982     $INTRINSICS_LIST
1983     $MATH_FUNCS
1984     $SYSTEM_FUNCS
1985     $THREADS_LIST
1986     $TOOLCHAIN_FEATURES
1987     $TYPES_LIST
1988     atomics_native
1989     dos_paths
1990     dxva2_lib
1991     dxva2api_cobj
1992     libc_msvcrt
1993     libdc1394_1
1994     libdc1394_2
1995     makeinfo
1996     makeinfo_html
1997     perl
1998     pod2man
1999     sdl
2000     section_data_rel_ro
2001     texi2html
2002     threads
2003     vaapi_drm
2004     vaapi_x11
2005     vdpau_x11
2006     winrt
2007     xlib
2008 "
2009
2010 # options emitted with CONFIG_ prefix but not available on the command line
2011 CONFIG_EXTRA="
2012     aandcttables
2013     ac3dsp
2014     audio_frame_queue
2015     audiodsp
2016     blockdsp
2017     bswapdsp
2018     cabac
2019     dirac_parse
2020     dvprofile
2021     exif
2022     faandct
2023     faanidct
2024     fdctdsp
2025     flacdsp
2026     fmtconvert
2027     frame_thread_encoder
2028     g722dsp
2029     golomb
2030     gplv3
2031     h263dsp
2032     h264chroma
2033     h264dsp
2034     h264pred
2035     h264qpel
2036     hpeldsp
2037     huffman
2038     huffyuvdsp
2039     huffyuvencdsp
2040     idctdsp
2041     iirfilter
2042     imdct15
2043     intrax8
2044     iso_media
2045     ividsp
2046     jpegtables
2047     lgplv3
2048     libx262
2049     llauddsp
2050     llviddsp
2051     lpc
2052     lzf
2053     me_cmp
2054     mpeg_er
2055     mpegaudio
2056     mpegaudiodsp
2057     mpegvideo
2058     mpegvideoenc
2059     mss34dsp
2060     pixblockdsp
2061     qpeldsp
2062     qsv
2063     qsvdec
2064     qsvenc
2065     rangecoder
2066     riffdec
2067     riffenc
2068     rtpdec
2069     rtpenc_chain
2070     rv34dsp
2071     sinewin
2072     snappy
2073     srtp
2074     startcode
2075     texturedsp
2076     texturedspenc
2077     tpeldsp
2078     vaapi_encode
2079     vc1dsp
2080     videodsp
2081     vp3dsp
2082     vp56dsp
2083     vp8dsp
2084     vt_bt2020
2085     wma_freqs
2086     wmv2dsp
2087 "
2088
2089 CMDLINE_SELECT="
2090     $ARCH_EXT_LIST
2091     $CONFIG_LIST
2092     $HAVE_LIST_CMDLINE
2093     $THREADS_LIST
2094     asm
2095     cross_compile
2096     debug
2097     extra_warnings
2098     logging
2099     lto
2100     optimizations
2101     rpath
2102     stripping
2103 "
2104
2105 PATHS_LIST="
2106     bindir
2107     datadir
2108     docdir
2109     incdir
2110     libdir
2111     mandir
2112     pkgconfigdir
2113     prefix
2114     shlibdir
2115     install_name_dir
2116 "
2117
2118 CMDLINE_SET="
2119     $PATHS_LIST
2120     ar
2121     arch
2122     as
2123     assert_level
2124     build_suffix
2125     cc
2126     objcc
2127     cpu
2128     cross_prefix
2129     custom_allocator
2130     cxx
2131     dep_cc
2132     doxygen
2133     env
2134     extra_version
2135     gas
2136     host_cc
2137     host_cflags
2138     host_ld
2139     host_ldflags
2140     host_libs
2141     host_os
2142     install
2143     ld
2144     ln_s
2145     logfile
2146     malloc_prefix
2147     nm
2148     optflags
2149     pkg_config
2150     pkg_config_flags
2151     progs_suffix
2152     random_seed
2153     ranlib
2154     samples
2155     strip
2156     sws_max_filter_size
2157     sysinclude
2158     sysroot
2159     target_exec
2160     target_os
2161     target_path
2162     target_samples
2163     tempprefix
2164     toolchain
2165     valgrind
2166     yasmexe
2167 "
2168
2169 CMDLINE_APPEND="
2170     extra_cflags
2171     extra_cxxflags
2172     extra_objcflags
2173     host_cppflags
2174 "
2175
2176 # code dependency declarations
2177
2178 # architecture extensions
2179
2180 armv5te_deps="arm"
2181 armv6_deps="arm"
2182 armv6t2_deps="arm"
2183 armv8_deps="aarch64"
2184 neon_deps_any="aarch64 arm"
2185 intrinsics_neon_deps="neon"
2186 vfp_deps_any="aarch64 arm"
2187 vfpv3_deps="vfp"
2188 setend_deps="arm"
2189
2190 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
2191
2192 mipsfpu_deps="mips"
2193 mipsdsp_deps="mips"
2194 mipsdspr2_deps="mips"
2195 mips32r2_deps="mips"
2196 mips32r5_deps="mips"
2197 mips32r6_deps="mips"
2198 mips64r2_deps="mips"
2199 mips64r6_deps="mips"
2200 msa_deps="mipsfpu"
2201 mmi_deps="mips"
2202
2203 altivec_deps="ppc"
2204 dcbzl_deps="ppc"
2205 ldbrx_deps="ppc"
2206 ppc4xx_deps="ppc"
2207 vsx_deps="altivec"
2208 power8_deps="vsx"
2209
2210 cpunop_deps="i686"
2211 x86_64_select="i686"
2212 x86_64_suggest="fast_cmov"
2213
2214 amd3dnow_deps="mmx"
2215 amd3dnowext_deps="amd3dnow"
2216 i686_deps="x86"
2217 mmx_deps="x86"
2218 mmxext_deps="mmx"
2219 sse_deps="mmxext"
2220 sse2_deps="sse"
2221 sse3_deps="sse2"
2222 ssse3_deps="sse3"
2223 sse4_deps="ssse3"
2224 sse42_deps="sse4"
2225 aesni_deps="sse42"
2226 avx_deps="sse42"
2227 xop_deps="avx"
2228 fma3_deps="avx"
2229 fma4_deps="avx"
2230 avx2_deps="avx"
2231
2232 mmx_external_deps="yasm"
2233 mmx_inline_deps="inline_asm"
2234 mmx_suggest="mmx_external mmx_inline"
2235
2236 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
2237     eval dep=\$${ext}_deps
2238     eval ${ext}_external_deps='"${dep}_external"'
2239     eval ${ext}_inline_deps='"${dep}_inline"'
2240     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
2241 done
2242
2243 aligned_stack_if_any="aarch64 ppc x86"
2244 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
2245 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
2246 fast_unaligned_if_any="aarch64 ppc x86"
2247 simd_align_16_if_any="altivec neon sse"
2248
2249 # system capabilities
2250 symver_if_any="symver_asm_label symver_gnu_asm"
2251 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
2252
2253 # threading support
2254 atomics_gcc_if_any="sync_val_compare_and_swap atomic_compare_exchange"
2255 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
2256 atomics_win32_if="MemoryBarrier"
2257 atomics_native_if_any="$ATOMICS_LIST"
2258 w32threads_deps="atomics_native"
2259 threads_if_any="$THREADS_LIST"
2260
2261 # subsystems
2262 dct_select="rdft"
2263 dirac_parse_select="golomb"
2264 error_resilience_select="me_cmp"
2265 faandct_deps="faan fdctdsp"
2266 faanidct_deps="faan idctdsp"
2267 h264dsp_select="startcode"
2268 frame_thread_encoder_deps="encoders threads"
2269 intrax8_select="blockdsp idctdsp"
2270 mdct_select="fft"
2271 me_cmp_select="fdctdsp idctdsp pixblockdsp"
2272 mpeg_er_select="error_resilience"
2273 mpegaudio_select="mpegaudiodsp"
2274 mpegaudiodsp_select="dct"
2275 mpegvideo_select="blockdsp h264chroma hpeldsp idctdsp me_cmp mpeg_er videodsp"
2276 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
2277 qsvdec_select="qsv"
2278 qsvenc_select="qsv"
2279 vaapi_encode_deps="vaapi"
2280 vc1dsp_select="h264chroma qpeldsp startcode"
2281 rdft_select="fft"
2282
2283 # decoders / encoders
2284 aac_decoder_select="imdct15 mdct sinewin"
2285 aac_fixed_decoder_select="mdct sinewin"
2286 aac_encoder_select="audio_frame_queue iirfilter lpc mdct sinewin"
2287 aac_latm_decoder_select="aac_decoder aac_latm_parser"
2288 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
2289 ac3_fixed_decoder_select="ac3_parser ac3dsp bswapdsp mdct"
2290 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
2291 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
2292 adpcm_g722_decoder_select="g722dsp"
2293 adpcm_g722_encoder_select="g722dsp"
2294 aic_decoder_select="golomb idctdsp"
2295 alac_encoder_select="lpc"
2296 als_decoder_select="bswapdsp"
2297 amrnb_decoder_select="lsp"
2298 amrwb_decoder_select="lsp"
2299 amv_decoder_select="sp5x_decoder exif"
2300 amv_encoder_select="aandcttables jpegtables mpegvideoenc"
2301 ape_decoder_select="bswapdsp llauddsp"
2302 apng_decoder_select="zlib"
2303 apng_encoder_select="huffyuvencdsp zlib"
2304 asv1_decoder_select="blockdsp bswapdsp idctdsp"
2305 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
2306 asv2_decoder_select="blockdsp bswapdsp idctdsp"
2307 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
2308 atrac1_decoder_select="mdct sinewin"
2309 atrac3_decoder_select="mdct"
2310 atrac3p_decoder_select="mdct sinewin"
2311 avrn_decoder_select="exif jpegtables"
2312 bink_decoder_select="blockdsp hpeldsp"
2313 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
2314 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
2315 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
2316 cllc_decoder_select="bswapdsp"
2317 comfortnoise_encoder_select="lpc"
2318 cook_decoder_select="audiodsp mdct sinewin"
2319 cscd_decoder_select="lzo"
2320 cscd_decoder_suggest="zlib"
2321 dca_decoder_select="mdct"
2322 dds_decoder_select="texturedsp"
2323 dirac_decoder_select="dirac_parse dwt golomb videodsp mpegvideoenc"
2324 dnxhd_decoder_select="blockdsp idctdsp"
2325 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
2326 dvvideo_decoder_select="dvprofile idctdsp"
2327 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
2328 dxa_decoder_select="zlib"
2329 dxv_decoder_select="lzf texturedsp"
2330 eac3_decoder_select="ac3_decoder"
2331 eac3_encoder_select="ac3_encoder"
2332 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
2333 eatgq_decoder_select="aandcttables"
2334 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
2335 exr_decoder_select="zlib"
2336 ffv1_decoder_select="golomb rangecoder"
2337 ffv1_encoder_select="rangecoder"
2338 ffvhuff_decoder_select="huffyuv_decoder"
2339 ffvhuff_encoder_select="huffyuv_encoder"
2340 fic_decoder_select="golomb"
2341 flac_decoder_select="flacdsp golomb"
2342 flac_encoder_select="bswapdsp flacdsp golomb lpc"
2343 flashsv2_decoder_select="zlib"
2344 flashsv2_encoder_select="zlib"
2345 flashsv_decoder_select="zlib"
2346 flashsv_encoder_select="zlib"
2347 flv_decoder_select="h263_decoder"
2348 flv_encoder_select="h263_encoder"
2349 fourxm_decoder_select="blockdsp bswapdsp"
2350 fraps_decoder_select="bswapdsp huffman"
2351 g2m_decoder_select="blockdsp idctdsp jpegtables zlib"
2352 g729_decoder_select="audiodsp"
2353 h261_decoder_select="mpegvideo"
2354 h261_encoder_select="aandcttables mpegvideoenc"
2355 h263_decoder_select="h263_parser h263dsp mpegvideo qpeldsp"
2356 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
2357 h263i_decoder_select="h263_decoder"
2358 h263p_decoder_select="h263_decoder"
2359 h263p_encoder_select="h263_encoder"
2360 h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel videodsp"
2361 h264_decoder_suggest="error_resilience"
2362 h264_qsv_decoder_deps="libmfx"
2363 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
2364 h264_qsv_encoder_deps="libmfx"
2365 h264_qsv_encoder_select="qsvenc"
2366 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
2367 h264_vaapi_encoder_select="vaapi_encode golomb"
2368 hap_decoder_select="snappy texturedsp"
2369 hap_encoder_deps="libsnappy"
2370 hap_encoder_select="texturedspenc"
2371 hevc_decoder_select="bswapdsp cabac golomb videodsp"
2372 hevc_qsv_decoder_deps="libmfx"
2373 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser qsvdec hevc_qsv_hwaccel"
2374 hevc_qsv_encoder_deps="libmfx"
2375 hevc_qsv_encoder_select="qsvenc"
2376 huffyuv_decoder_select="bswapdsp huffyuvdsp llviddsp"
2377 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp llviddsp"
2378 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
2379 hevc_vaapi_encoder_select="vaapi_encode golomb"
2380 iac_decoder_select="imc_decoder"
2381 imc_decoder_select="bswapdsp fft mdct sinewin"
2382 indeo3_decoder_select="hpeldsp"
2383 indeo4_decoder_select="ividsp"
2384 indeo5_decoder_select="ividsp"
2385 interplay_video_decoder_select="hpeldsp"
2386 jpegls_decoder_select="golomb mjpeg_decoder"
2387 jpegls_encoder_select="golomb"
2388 jv_decoder_select="blockdsp"
2389 lagarith_decoder_select="huffyuvdsp"
2390 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
2391 loco_decoder_select="golomb"
2392 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2393 metasound_decoder_select="lsp mdct sinewin"
2394 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2395 mjpeg_decoder_select="blockdsp hpeldsp exif idctdsp jpegtables"
2396 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
2397 mjpegb_decoder_select="mjpeg_decoder"
2398 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
2399 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
2400 mlp_decoder_select="mlp_parser"
2401 motionpixels_decoder_select="bswapdsp"
2402 mp1_decoder_select="mpegaudio"
2403 mp1float_decoder_select="mpegaudio"
2404 mp2_decoder_select="mpegaudio"
2405 mp2float_decoder_select="mpegaudio"
2406 mp3_decoder_select="mpegaudio"
2407 mp3adu_decoder_select="mpegaudio"
2408 mp3adufloat_decoder_select="mpegaudio"
2409 mp3float_decoder_select="mpegaudio"
2410 mp3on4_decoder_select="mpegaudio"
2411 mp3on4float_decoder_select="mpegaudio"
2412 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2413 mpc8_decoder_select="mpegaudiodsp"
2414 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2415 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2416 mpegvideo_decoder_select="mpegvideo"
2417 mpeg1video_decoder_select="mpegvideo"
2418 mpeg1video_encoder_select="aandcttables mpegvideoenc h263dsp"
2419 mpeg2video_decoder_select="mpegvideo"
2420 mpeg2video_encoder_select="aandcttables mpegvideoenc h263dsp"
2421 mpeg2_qsv_decoder_deps="libmfx"
2422 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel"
2423 mpeg2_qsv_encoder_deps="libmfx"
2424 mpeg2_qsv_encoder_select="qsvenc"
2425 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2426 mpeg4_encoder_select="h263_encoder"
2427 msa1_decoder_select="mss34dsp"
2428 msmpeg4v1_decoder_select="h263_decoder"
2429 msmpeg4v2_decoder_select="h263_decoder"
2430 msmpeg4v2_encoder_select="h263_encoder"
2431 msmpeg4v3_decoder_select="h263_decoder"
2432 msmpeg4v3_encoder_select="h263_encoder"
2433 mss2_decoder_select="vc1_decoder mpegvideo"
2434 mts2_decoder_select="mss34dsp"
2435 mxpeg_decoder_select="mjpeg_decoder"
2436 nellymoser_decoder_select="mdct sinewin"
2437 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2438 nuv_decoder_select="idctdsp lzo"
2439 on2avc_decoder_select="mdct"
2440 opus_decoder_deps="swresample"
2441 opus_decoder_select="imdct15"
2442 png_decoder_select="zlib"
2443 png_encoder_select="huffyuvencdsp zlib"
2444 prores_decoder_select="blockdsp idctdsp"
2445 prores_encoder_select="fdctdsp"
2446 qcelp_decoder_select="lsp"
2447 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2448 ra_144_decoder_select="audiodsp"
2449 ra_144_encoder_select="audio_frame_queue lpc audiodsp"
2450 ralf_decoder_select="golomb"
2451 rawvideo_decoder_select="bswapdsp"
2452 rscc_decoder_select="zlib"
2453 rtjpeg_decoder_select="me_cmp"
2454 rv10_decoder_select="h263_decoder"
2455 rv10_encoder_select="h263_encoder"
2456 rv20_decoder_select="h263_decoder"
2457 rv20_encoder_select="h263_encoder"
2458 rv30_decoder_select="golomb h264pred h264qpel mpegvideo rv34dsp"
2459 rv40_decoder_select="golomb h264pred h264qpel mpegvideo rv34dsp"
2460 screenpresso_decoder_select="zlib"
2461 shorten_decoder_select="golomb"
2462 sipr_decoder_select="lsp"
2463 snow_decoder_select="dwt h264qpel hpeldsp me_cmp rangecoder videodsp"
2464 snow_encoder_select="aandcttables dwt h264qpel hpeldsp me_cmp mpegvideoenc rangecoder"
2465 sonic_decoder_select="golomb rangecoder"
2466 sonic_encoder_select="golomb rangecoder"
2467 sonic_ls_encoder_select="golomb rangecoder"
2468 sp5x_decoder_select="mjpeg_decoder"
2469 svq1_decoder_select="hpeldsp"
2470 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2471 svq3_decoder_select="golomb h264dsp h264pred hpeldsp tpeldsp videodsp"
2472 svq3_decoder_suggest="zlib"
2473 tak_decoder_select="audiodsp"
2474 tdsc_decoder_select="zlib mjpeg_decoder"
2475 theora_decoder_select="vp3_decoder"
2476 thp_decoder_select="mjpeg_decoder"
2477 tiff_decoder_suggest="zlib lzma"
2478 tiff_encoder_suggest="zlib"
2479 truehd_decoder_select="mlp_parser"
2480 truemotion2_decoder_select="bswapdsp"
2481 truespeech_decoder_select="bswapdsp"
2482 tscc_decoder_select="zlib"
2483 twinvq_decoder_select="mdct lsp sinewin"
2484 txd_decoder_select="texturedsp"
2485 utvideo_decoder_select="bswapdsp"
2486 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2487 vble_decoder_select="huffyuvdsp"
2488 vc1_decoder_select="blockdsp h263_decoder h264qpel intrax8 mpegvideo vc1dsp"
2489 vc1_qsv_decoder_deps="libmfx"
2490 vc1_qsv_decoder_select="qsvdec vc1_qsv_hwaccel"
2491 vc1image_decoder_select="vc1_decoder"
2492 vorbis_decoder_select="mdct"
2493 vorbis_encoder_select="mdct"
2494 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2495 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2496 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2497 vp6a_decoder_select="vp6_decoder"
2498 vp6f_decoder_select="vp6_decoder"
2499 vp7_decoder_select="h264pred videodsp vp8dsp"
2500 vp8_decoder_select="h264pred videodsp vp8dsp"
2501 vp9_decoder_select="videodsp vp9_parser"
2502 webp_decoder_select="vp8_decoder exif"
2503 wmalossless_decoder_select="llauddsp"
2504 wmapro_decoder_select="mdct sinewin wma_freqs"
2505 wmav1_decoder_select="mdct sinewin wma_freqs"
2506 wmav1_encoder_select="mdct sinewin wma_freqs"
2507 wmav2_decoder_select="mdct sinewin wma_freqs"
2508 wmav2_encoder_select="mdct sinewin wma_freqs"
2509 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2510 wmv1_decoder_select="h263_decoder"
2511 wmv1_encoder_select="h263_encoder"
2512 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2513 wmv2_encoder_select="h263_encoder wmv2dsp"
2514 wmv3_decoder_select="vc1_decoder"
2515 wmv3image_decoder_select="wmv3_decoder"
2516 xma1_decoder_select="wmapro_decoder"
2517 xma2_decoder_select="wmapro_decoder"
2518 zerocodec_decoder_select="zlib"
2519 zlib_decoder_select="zlib"
2520 zlib_encoder_select="zlib"
2521 zmbv_decoder_select="zlib"
2522 zmbv_encoder_select="zlib"
2523
2524 # platform codecs
2525 audiotoolbox_deps="AudioToolbox_AudioToolbox_h"
2526 audiotoolbox_extralibs="-framework CoreFoundation -framework AudioToolbox -framework CoreMedia"
2527
2528 # hardware accelerators
2529 crystalhd_deps="libcrystalhd_libcrystalhd_if_h"
2530 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder ID3D11VideoContext"
2531 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2532 vaapi_deps="va_va_h"
2533 vda_framework_deps="VideoDecodeAcceleration_VDADecoder_h"
2534 vda_framework_extralibs="-framework VideoDecodeAcceleration"
2535 vda_deps="vda_framework pthreads"
2536 vda_extralibs="-framework CoreFoundation -framework QuartzCore"
2537 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2538 videotoolbox_hwaccel_deps="videotoolbox pthreads"
2539 videotoolbox_hwaccel_extralibs="-framework QuartzCore"
2540 xvmc_deps="X11_extensions_XvMClib_h"
2541
2542 h263_vaapi_hwaccel_deps="vaapi"
2543 h263_vaapi_hwaccel_select="h263_decoder"
2544 h263_videotoolbox_hwaccel_deps="videotoolbox"
2545 h263_videotoolbox_hwaccel_select="h263_decoder"
2546 h264_crystalhd_decoder_select="crystalhd h264_mp4toannexb_bsf h264_parser"
2547 h264_d3d11va_hwaccel_deps="d3d11va"
2548 h264_d3d11va_hwaccel_select="h264_decoder"
2549 h264_dxva2_hwaccel_deps="dxva2"
2550 h264_dxva2_hwaccel_select="h264_decoder"
2551 h264_mediacodec_decoder_deps="mediacodec"
2552 h264_mediacodec_decoder_select="h264_mp4toannexb_bsf h264_parser"
2553 h264_mmal_decoder_deps="mmal"
2554 h264_mmal_decoder_select="mmal"
2555 h264_mmal_hwaccel_deps="mmal"
2556 h264_qsv_hwaccel_deps="libmfx"
2557 h264_vaapi_hwaccel_deps="vaapi"
2558 h264_vaapi_hwaccel_select="h264_decoder"
2559 h264_vda_decoder_deps="vda"
2560 h264_vda_decoder_select="h264_decoder"
2561 h264_vda_hwaccel_deps="vda"
2562 h264_vda_hwaccel_select="h264_decoder"
2563 h264_vda_old_hwaccel_deps="vda"
2564 h264_vda_old_hwaccel_select="h264_decoder"
2565 h264_vdpau_decoder_deps="vdpau"
2566 h264_vdpau_decoder_select="h264_decoder"
2567 h264_vdpau_hwaccel_deps="vdpau"
2568 h264_vdpau_hwaccel_select="h264_decoder"
2569 h264_videotoolbox_hwaccel_deps="videotoolbox"
2570 h264_videotoolbox_hwaccel_select="h264_decoder"
2571 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2572 hevc_d3d11va_hwaccel_select="hevc_decoder"
2573 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2574 hevc_dxva2_hwaccel_select="hevc_decoder"
2575 hevc_qsv_hwaccel_deps="libmfx"
2576 hevc_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferHEVC"
2577 hevc_vaapi_hwaccel_select="hevc_decoder"
2578 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2579 hevc_vdpau_hwaccel_select="hevc_decoder"
2580 mpeg_vdpau_decoder_deps="vdpau"
2581 mpeg_vdpau_decoder_select="mpeg2video_decoder"
2582 mpeg_xvmc_hwaccel_deps="xvmc"
2583 mpeg_xvmc_hwaccel_select="mpeg2video_decoder"
2584 mpeg1_vdpau_decoder_deps="vdpau"
2585 mpeg1_vdpau_decoder_select="mpeg1video_decoder"
2586 mpeg1_vdpau_hwaccel_deps="vdpau"
2587 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2588 mpeg1_videotoolbox_hwaccel_deps="videotoolbox"
2589 mpeg1_videotoolbox_hwaccel_select="mpeg1video_decoder"
2590 mpeg1_xvmc_hwaccel_deps="xvmc"
2591 mpeg1_xvmc_hwaccel_select="mpeg1video_decoder"
2592 mpeg2_crystalhd_decoder_select="crystalhd"
2593 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2594 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2595 mpeg2_dxva2_hwaccel_deps="dxva2"
2596 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2597 mpeg2_mmal_decoder_deps="mmal"
2598 mpeg2_mmal_decoder_select="mmal"
2599 mpeg2_mmal_hwaccel_deps="mmal"
2600 mpeg2_qsv_hwaccel_deps="libmfx"
2601 mpeg2_qsv_hwaccel_select="qsvdec_mpeg2"
2602 mpeg2_vaapi_hwaccel_deps="vaapi"
2603 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2604 mpeg2_vdpau_hwaccel_deps="vdpau"
2605 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2606 mpeg2_videotoolbox_hwaccel_deps="videotoolbox"
2607 mpeg2_videotoolbox_hwaccel_select="mpeg2video_decoder"
2608 mpeg2_xvmc_hwaccel_deps="xvmc"
2609 mpeg2_xvmc_hwaccel_select="mpeg2video_decoder"
2610 mpeg4_crystalhd_decoder_select="crystalhd"
2611 mpeg4_mmal_decoder_deps="mmal"
2612 mpeg4_mmal_decoder_select="mmal"
2613 mpeg4_mmal_hwaccel_deps="mmal"
2614 mpeg4_vaapi_hwaccel_deps="vaapi"
2615 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2616 mpeg4_vdpau_decoder_deps="vdpau"
2617 mpeg4_vdpau_decoder_select="mpeg4_decoder"
2618 mpeg4_vdpau_hwaccel_deps="vdpau"
2619 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2620 mpeg4_videotoolbox_hwaccel_deps="videotoolbox"
2621 mpeg4_videotoolbox_hwaccel_select="mpeg4_decoder"
2622 msmpeg4_crystalhd_decoder_select="crystalhd"
2623 vc1_crystalhd_decoder_select="crystalhd"
2624 vc1_d3d11va_hwaccel_deps="d3d11va"
2625 vc1_d3d11va_hwaccel_select="vc1_decoder"
2626 vc1_dxva2_hwaccel_deps="dxva2"
2627 vc1_dxva2_hwaccel_select="vc1_decoder"
2628 vc1_mmal_decoder_deps="mmal"
2629 vc1_mmal_decoder_select="mmal"
2630 vc1_mmal_hwaccel_deps="mmal"
2631 vc1_qsv_hwaccel_deps="libmfx"
2632 vc1_qsv_hwaccel_select="qsvdec_vc1"
2633 vc1_vaapi_hwaccel_deps="vaapi"
2634 vc1_vaapi_hwaccel_select="vc1_decoder"
2635 vc1_vdpau_decoder_deps="vdpau"
2636 vc1_vdpau_decoder_select="vc1_decoder"
2637 vc1_vdpau_hwaccel_deps="vdpau"
2638 vc1_vdpau_hwaccel_select="vc1_decoder"
2639 vp9_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_VP9"
2640 vp9_d3d11va_hwaccel_select="vp9_decoder"
2641 vp9_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_VP9"
2642 vp9_dxva2_hwaccel_select="vp9_decoder"
2643 vp9_vaapi_hwaccel_deps="vaapi VADecPictureParameterBufferVP9"
2644 vp9_vaapi_hwaccel_select="vp9_decoder"
2645 wmv3_crystalhd_decoder_select="crystalhd"
2646 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2647 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2648 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2649 wmv3_vdpau_decoder_select="vc1_vdpau_decoder"
2650 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2651
2652 # parsers
2653 h264_parser_select="h264_decoder"
2654 hevc_parser_select="golomb"
2655 mpegvideo_parser_select="mpegvideo"
2656 mpeg4video_parser_select="h263dsp mpegvideo qpeldsp"
2657 vc1_parser_select="vc1dsp"
2658
2659 # bitstream_filters
2660 mjpeg2jpeg_bsf_select="jpegtables"
2661
2662 # external libraries
2663 aac_at_decoder_deps="audiotoolbox"
2664 ac3_at_decoder_deps="audiotoolbox"
2665 ac3_at_decoder_select="ac3_parser"
2666 adpcm_ima_qt_at_decoder_deps="audiotoolbox"
2667 alac_at_decoder_deps="audiotoolbox"
2668 amr_nb_at_decoder_deps="audiotoolbox"
2669 eac3_at_decoder_deps="audiotoolbox"
2670 eac3_at_decoder_select="ac3_parser"
2671 gsm_ms_at_decoder_deps="audiotoolbox"
2672 ilbc_at_decoder_deps="audiotoolbox"
2673 mp1_at_decoder_deps="audiotoolbox"
2674 mp2_at_decoder_deps="audiotoolbox"
2675 mp3_at_decoder_deps="audiotoolbox"
2676 pcm_alaw_at_decoder_deps="audiotoolbox"
2677 pcm_mulaw_at_decoder_deps="audiotoolbox"
2678 qdmc_at_decoder_deps="audiotoolbox"
2679 qdm2_at_decoder_deps="audiotoolbox"
2680 aac_at_encoder_deps="audiotoolbox"
2681 aac_at_encoder_select="audio_frame_queue"
2682 alac_at_encoder_deps="audiotoolbox"
2683 alac_at_encoder_select="audio_frame_queue"
2684 ilbc_at_encoder_deps="audiotoolbox"
2685 ilbc_at_encoder_select="audio_frame_queue"
2686 pcm_alaw_at_encoder_deps="audiotoolbox"
2687 pcm_alaw_at_encoder_select="audio_frame_queue"
2688 pcm_mulaw_at_encoder_deps="audiotoolbox"
2689 pcm_mulaw_at_encoder_select="audio_frame_queue"
2690 chromaprint_muxer_deps="chromaprint"
2691 h264_videotoolbox_encoder_deps="videotoolbox_encoder pthreads"
2692 libcelt_decoder_deps="libcelt"
2693 libfaac_encoder_deps="libfaac"
2694 libfaac_encoder_select="audio_frame_queue"
2695 libfdk_aac_decoder_deps="libfdk_aac"
2696 libfdk_aac_encoder_deps="libfdk_aac"
2697 libfdk_aac_encoder_select="audio_frame_queue"
2698 libgme_demuxer_deps="libgme"
2699 libgsm_decoder_deps="libgsm"
2700 libgsm_encoder_deps="libgsm"
2701 libgsm_ms_decoder_deps="libgsm"
2702 libgsm_ms_encoder_deps="libgsm"
2703 libilbc_decoder_deps="libilbc"
2704 libilbc_encoder_deps="libilbc"
2705 libkvazaar_encoder_deps="libkvazaar"
2706 libmodplug_demuxer_deps="libmodplug"
2707 libmp3lame_encoder_deps="libmp3lame"
2708 libmp3lame_encoder_select="audio_frame_queue"
2709 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2710 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2711 libopencore_amrnb_encoder_select="audio_frame_queue"
2712 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2713 libopenh264_encoder_deps="libopenh264"
2714 libopenjpeg_decoder_deps="libopenjpeg"
2715 libopenjpeg_encoder_deps="libopenjpeg"
2716 libopus_decoder_deps="libopus"
2717 libopus_encoder_deps="libopus"
2718 libopus_encoder_select="audio_frame_queue"
2719 libschroedinger_decoder_deps="libschroedinger"
2720 libschroedinger_encoder_deps="libschroedinger"
2721 libshine_encoder_deps="libshine"
2722 libshine_encoder_select="audio_frame_queue"
2723 libspeex_decoder_deps="libspeex"
2724 libspeex_encoder_deps="libspeex"
2725 libspeex_encoder_select="audio_frame_queue"
2726 libtheora_encoder_deps="libtheora"
2727 libtwolame_encoder_deps="libtwolame"
2728 libutvideo_decoder_deps="libutvideo"
2729 libutvideo_encoder_deps="libutvideo"
2730 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2731 libvorbis_decoder_deps="libvorbis"
2732 libvorbis_encoder_deps="libvorbis"
2733 libvorbis_encoder_select="audio_frame_queue"
2734 libvpx_vp8_decoder_deps="libvpx"
2735 libvpx_vp8_encoder_deps="libvpx"
2736 libvpx_vp9_decoder_deps="libvpx"
2737 libvpx_vp9_encoder_deps="libvpx"
2738 libwavpack_encoder_deps="libwavpack"
2739 libwebp_encoder_deps="libwebp"
2740 libwebp_anim_encoder_deps="libwebp"
2741 libx262_encoder_deps="libx262"
2742 libx264_encoder_deps="libx264"
2743 libx264rgb_encoder_deps="libx264"
2744 libx264rgb_encoder_select="libx264_encoder"
2745 libx265_encoder_deps="libx265"
2746 libxavs_encoder_deps="libxavs"
2747 libxvid_encoder_deps="libxvid"
2748 libzvbi_teletext_decoder_deps="libzvbi"
2749 nvenc_encoder_deps="nvenc"
2750 nvenc_h264_encoder_deps="nvenc"
2751 nvenc_hevc_encoder_deps="nvenc"
2752 videotoolbox_deps="VideoToolbox_VideoToolbox_h"
2753 videotoolbox_extralibs="-framework CoreFoundation -framework VideoToolbox -framework CoreMedia -framework CoreVideo"
2754 videotoolbox_encoder_deps="videotoolbox VTCompressionSessionPrepareToEncodeFrames"
2755 videotoolbox_encoder_suggest="vda_framework vt_bt2020"
2756 vt_bt2020_deps="kCVImageBufferColorPrimaries_ITU_R_2020"
2757
2758 # demuxers / muxers
2759 ac3_demuxer_select="ac3_parser"
2760 asf_demuxer_select="riffdec"
2761 asf_o_demuxer_select="riffdec"
2762 asf_muxer_select="riffenc"
2763 asf_stream_muxer_select="asf_muxer"
2764 avi_demuxer_select="iso_media riffdec exif"
2765 avi_muxer_select="riffenc"
2766 avisynth_demuxer_deps="avisynth"
2767 avisynth_demuxer_select="riffdec"
2768 caf_demuxer_select="iso_media riffdec"
2769 dash_muxer_select="mp4_muxer"
2770 dirac_demuxer_select="dirac_parser"
2771 dts_demuxer_select="dca_parser"
2772 dtshd_demuxer_select="dca_parser"
2773 dv_demuxer_select="dvprofile"
2774 dv_muxer_select="dvprofile"
2775 dxa_demuxer_select="riffdec"
2776 eac3_demuxer_select="ac3_parser"
2777 f4v_muxer_select="mov_muxer"
2778 flac_demuxer_select="flac_parser"
2779 hds_muxer_select="flv_muxer"
2780 hls_muxer_select="mpegts_muxer"
2781 image2_alias_pix_demuxer_select="image2_demuxer"
2782 image2_brender_pix_demuxer_select="image2_demuxer"
2783 ipod_muxer_select="mov_muxer"
2784 ismv_muxer_select="mov_muxer"
2785 libnut_demuxer_deps="libnut"
2786 libnut_muxer_deps="libnut"
2787 matroska_audio_muxer_select="matroska_muxer"
2788 matroska_demuxer_select="iso_media riffdec"
2789 matroska_demuxer_suggest="bzlib lzo zlib"
2790 matroska_muxer_select="iso_media riffenc"
2791 mmf_muxer_select="riffenc"
2792 mov_demuxer_select="iso_media riffdec"
2793 mov_demuxer_suggest="zlib"
2794 mov_muxer_select="iso_media riffenc rtpenc_chain"
2795 mp3_demuxer_select="mpegaudio_parser"
2796 mp4_muxer_select="mov_muxer"
2797 mpegts_demuxer_select="iso_media"
2798 mpegts_muxer_select="adts_muxer latm_muxer"
2799 mpegtsraw_demuxer_select="mpegts_demuxer"
2800 mxf_d10_muxer_select="mxf_muxer"
2801 mxf_opatom_muxer_select="mxf_muxer"
2802 nut_muxer_select="riffenc"
2803 nuv_demuxer_select="riffdec"
2804 oga_muxer_select="ogg_muxer"
2805 ogg_demuxer_select="dirac_parse"
2806 opus_muxer_select="ogg_muxer"
2807 psp_muxer_select="mov_muxer"
2808 rtp_demuxer_select="sdp_demuxer"
2809 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2810 rtsp_demuxer_select="http_protocol rtpdec"
2811 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2812 sap_demuxer_select="sdp_demuxer"
2813 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2814 sdp_demuxer_select="rtpdec"
2815 smoothstreaming_muxer_select="ismv_muxer"
2816 spdif_muxer_select="aac_parser"
2817 spx_muxer_select="ogg_muxer"
2818 swf_demuxer_suggest="zlib"
2819 tak_demuxer_select="tak_parser"
2820 tg2_muxer_select="mov_muxer"
2821 tgp_muxer_select="mov_muxer"
2822 vobsub_demuxer_select="mpegps_demuxer"
2823 w64_demuxer_select="wav_demuxer"
2824 w64_muxer_select="wav_muxer"
2825 wav_demuxer_select="riffdec"
2826 wav_muxer_select="riffenc"
2827 webm_muxer_select="iso_media riffenc"
2828 webm_dash_manifest_demuxer_select="matroska_demuxer"
2829 wtv_demuxer_select="mpegts_demuxer riffdec"
2830 wtv_muxer_select="mpegts_muxer riffenc"
2831 xmv_demuxer_select="riffdec"
2832 xwma_demuxer_select="riffdec"
2833
2834 # indevs / outdevs
2835 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2836 alsa_outdev_deps="alsa_asoundlib_h"
2837 avfoundation_indev_extralibs="-framework CoreVideo -framework Foundation -framework AVFoundation -framework CoreMedia"
2838 avfoundation_indev_select="avfoundation"
2839 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2840 caca_outdev_deps="libcaca"
2841 decklink_indev_deps="decklink pthreads"
2842 decklink_indev_extralibs="-lstdc++"
2843 decklink_outdev_deps="decklink pthreads"
2844 decklink_outdev_extralibs="-lstdc++"
2845 dshow_indev_deps="IBaseFilter"
2846 dshow_indev_extralibs="-lpsapi -lole32 -lstrmiids -luuid -loleaut32 -lshlwapi"
2847 dv1394_indev_deps="dv1394"
2848 dv1394_indev_select="dv_demuxer"
2849 fbdev_indev_deps="linux_fb_h"
2850 fbdev_outdev_deps="linux_fb_h"
2851 gdigrab_indev_deps="CreateDIBSection"
2852 gdigrab_indev_extralibs="-lgdi32"
2853 gdigrab_indev_select="bmp_decoder"
2854 iec61883_indev_deps="libiec61883"
2855 jack_indev_deps="jack_jack_h"
2856 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
2857 lavfi_indev_deps="avfilter"
2858 libcdio_indev_deps="libcdio"
2859 libdc1394_indev_deps="libdc1394"
2860 libv4l2_indev_deps="libv4l2"
2861 openal_indev_deps="openal"
2862 opengl_outdev_deps="opengl"
2863 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2864 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2865 pulse_indev_deps="libpulse"
2866 pulse_outdev_deps="libpulse"
2867 qtkit_indev_extralibs="-framework QTKit -framework Foundation -framework QuartzCore"
2868 qtkit_indev_select="qtkit"
2869 sdl_outdev_deps="sdl"
2870 sndio_indev_deps="sndio_h"
2871 sndio_outdev_deps="sndio_h"
2872 v4l_indev_deps="linux_videodev_h"
2873 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2874 v4l2_outdev_deps_any="linux_videodev2_h sys_videoio_h"
2875 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2876 vfwcap_indev_extralibs="-lavicap32"
2877 x11grab_indev_deps="x11grab"
2878 x11grab_xcb_indev_deps="libxcb"
2879 xv_outdev_deps="X11_extensions_Xvlib_h XvGetPortAttribute"
2880 xv_outdev_extralibs="-lXv -lX11 -lXext"
2881
2882 # protocols
2883 async_protocol_deps="threads"
2884 bluray_protocol_deps="libbluray"
2885 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2886 ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
2887 ffrtmpcrypt_protocol_select="tcp_protocol"
2888 ffrtmphttp_protocol_deps="!librtmp_protocol"
2889 ffrtmphttp_protocol_select="http_protocol"
2890 ftp_protocol_select="tcp_protocol"
2891 gopher_protocol_select="network"
2892 http_protocol_select="tcp_protocol"
2893 httpproxy_protocol_select="tcp_protocol"
2894 https_protocol_select="tls_protocol"
2895 icecast_protocol_select="http_protocol"
2896 librtmp_protocol_deps="librtmp"
2897 librtmpe_protocol_deps="librtmp"
2898 librtmps_protocol_deps="librtmp"
2899 librtmpt_protocol_deps="librtmp"
2900 librtmpte_protocol_deps="librtmp"
2901 libsmbclient_protocol_deps="libsmbclient gplv3"
2902 libssh_protocol_deps="libssh"
2903 mmsh_protocol_select="http_protocol"
2904 mmst_protocol_select="network"
2905 rtmp_protocol_deps="!librtmp_protocol"
2906 rtmp_protocol_select="tcp_protocol"
2907 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2908 rtmps_protocol_deps="!librtmp_protocol"
2909 rtmps_protocol_select="tls_protocol"
2910 rtmpt_protocol_select="ffrtmphttp_protocol"
2911 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2912 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2913 rtp_protocol_select="udp_protocol"
2914 sctp_protocol_deps="struct_sctp_event_subscribe struct_msghdr_msg_flags"
2915 sctp_protocol_select="network"
2916 srtp_protocol_select="rtp_protocol srtp"
2917 tcp_protocol_select="network"
2918 tls_gnutls_protocol_deps="gnutls !tls_schannel_protocol !tls_securetransport_protocol"
2919 tls_gnutls_protocol_select="tcp_protocol"
2920 tls_openssl_protocol_deps="openssl !tls_schannel_protocol !tls_securetransport_protocol !tls_gnutls_protocol"
2921 tls_openssl_protocol_select="tcp_protocol"
2922 tls_schannel_protocol_deps="schannel"
2923 tls_schannel_protocol_select="tcp_protocol"
2924 tls_securetransport_protocol_deps="securetransport"
2925 tls_securetransport_protocol_select="tcp_protocol"
2926 tls_protocol_deps_any="tls_schannel_protocol tls_securetransport_protocol tls_gnutls_protocol tls_openssl_protocol"
2927 udp_protocol_select="network"
2928 udplite_protocol_select="network"
2929 unix_protocol_deps="sys_un_h"
2930 unix_protocol_select="network"
2931
2932 # filters
2933 afftfilt_filter_deps="avcodec"
2934 afftfilt_filter_select="fft"
2935 amovie_filter_deps="avcodec avformat"
2936 aresample_filter_deps="swresample"
2937 ass_filter_deps="libass"
2938 asyncts_filter_deps="avresample"
2939 atempo_filter_deps="avcodec"
2940 atempo_filter_select="rdft"
2941 azmq_filter_deps="libzmq"
2942 blackframe_filter_deps="gpl"
2943 boxblur_filter_deps="gpl"
2944 bs2b_filter_deps="libbs2b"
2945 colormatrix_filter_deps="gpl"
2946 cover_rect_filter_deps="avcodec avformat gpl"
2947 cropdetect_filter_deps="gpl"
2948 delogo_filter_deps="gpl"
2949 deshake_filter_select="pixelutils"
2950 drawtext_filter_deps="libfreetype"
2951 ebur128_filter_deps="gpl"
2952 eq_filter_deps="gpl"
2953 fftfilt_filter_deps="avcodec"
2954 fftfilt_filter_select="rdft"
2955 find_rect_filter_deps="avcodec avformat gpl"
2956 firequalizer_filter_deps="avcodec"
2957 firequalizer_filter_select="rdft"
2958 flite_filter_deps="libflite"
2959 framerate_filter_select="pixelutils"
2960 frei0r_filter_deps="frei0r dlopen"
2961 frei0r_src_filter_deps="frei0r dlopen"
2962 fspp_filter_deps="gpl"
2963 geq_filter_deps="gpl"
2964 histeq_filter_deps="gpl"
2965 hqdn3d_filter_deps="gpl"
2966 hwupload_cuda_filter_deps="cuda"
2967 interlace_filter_deps="gpl"
2968 kerndeint_filter_deps="gpl"
2969 ladspa_filter_deps="ladspa dlopen"
2970 mcdeint_filter_deps="avcodec gpl"
2971 movie_filter_deps="avcodec avformat"
2972 mpdecimate_filter_deps="gpl"
2973 mpdecimate_filter_select="pixelutils"
2974 mptestsrc_filter_deps="gpl"
2975 negate_filter_deps="lut_filter"
2976 nnedi_filter_deps="gpl"
2977 ocr_filter_deps="libtesseract"
2978 ocv_filter_deps="libopencv"
2979 owdenoise_filter_deps="gpl"
2980 pan_filter_deps="swresample"
2981 perspective_filter_deps="gpl"
2982 phase_filter_deps="gpl"
2983 pp7_filter_deps="gpl"
2984 pp_filter_deps="gpl postproc"
2985 pullup_filter_deps="gpl"
2986 removelogo_filter_deps="avcodec avformat swscale"
2987 repeatfields_filter_deps="gpl"
2988 resample_filter_deps="avresample"
2989 rubberband_filter_deps="librubberband"
2990 sab_filter_deps="gpl swscale"
2991 scale2ref_filter_deps="swscale"
2992 scale_filter_deps="swscale"
2993 select_filter_select="pixelutils"
2994 showcqt_filter_deps="avcodec avformat swscale"
2995 showcqt_filter_select="fft"
2996 showfreqs_filter_deps="avcodec"
2997 showfreqs_filter_select="fft"
2998 showspectrum_filter_deps="avcodec"
2999 showspectrum_filter_select="fft"
3000 showspectrumpic_filter_deps="avcodec"
3001 showspectrumpic_filter_select="fft"
3002 smartblur_filter_deps="gpl swscale"
3003 sofalizer_filter_deps="netcdf avcodec"
3004 sofalizer_filter_select="fft"
3005 spectrumsynth_filter_deps="avcodec"
3006 spectrumsynth_filter_select="fft"
3007 spp_filter_deps="gpl avcodec"
3008 spp_filter_select="fft idctdsp fdctdsp me_cmp pixblockdsp"
3009 stereo3d_filter_deps="gpl"
3010 subtitles_filter_deps="avformat avcodec libass"
3011 super2xsai_filter_deps="gpl"
3012 pixfmts_super2xsai_test_deps="super2xsai_filter"
3013 tinterlace_filter_deps="gpl"
3014 tinterlace_merge_test_deps="tinterlace_filter"
3015 tinterlace_pad_test_deps="tinterlace_filter"
3016 uspp_filter_deps="gpl avcodec"
3017 vidstabdetect_filter_deps="libvidstab"
3018 vidstabtransform_filter_deps="libvidstab"
3019 zmq_filter_deps="libzmq"
3020 zoompan_filter_deps="swscale"
3021 zscale_filter_deps="libzimg"
3022 scale_npp_filter_deps="cuda libnpp"
3023 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
3024
3025 # examples
3026 avcodec_example_deps="avcodec avutil"
3027 avio_dir_cmd="avformat avutil"
3028 avio_reading="avformat avcodec avutil"
3029 decoding_encoding_example_deps="avcodec avformat avutil"
3030 demuxing_decoding_example_deps="avcodec avformat avutil"
3031 extract_mvs_example_deps="avcodec avformat avutil"
3032 filter_audio_example_deps="avfilter avutil"
3033 filtering_audio_example_deps="avfilter avcodec avformat avutil"
3034 filtering_video_example_deps="avfilter avcodec avformat avutil"
3035 metadata_example_deps="avformat avutil"
3036 muxing_example_deps="avcodec avformat avutil swscale"
3037 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder vaapi_x11"
3038 remuxing_example_deps="avcodec avformat avutil"
3039 resampling_audio_example_deps="avutil swresample"
3040 scaling_video_example_deps="avutil swscale"
3041 transcode_aac_example_deps="avcodec avformat swresample"
3042 transcoding_example_deps="avfilter avcodec avformat avutil"
3043
3044 # libraries, in linking order
3045 avcodec_deps="avutil"
3046 avdevice_deps="avformat avcodec avutil"
3047 avfilter_deps="avutil"
3048 avformat_deps="avcodec avutil"
3049 avresample_deps="avutil"
3050 postproc_deps="avutil gpl"
3051 swresample_deps="avutil"
3052 swscale_deps="avutil"
3053
3054 # programs
3055 ffmpeg_deps="avcodec avfilter avformat swresample"
3056 ffmpeg_select="aformat_filter anull_filter atrim_filter format_filter
3057                null_filter
3058                setpts_filter trim_filter"
3059 ffplay_deps="avcodec avformat swscale swresample sdl"
3060 ffplay_libs='$sdl_libs'
3061 ffplay_select="rdft crop_filter transpose_filter hflip_filter vflip_filter rotate_filter"
3062 ffprobe_deps="avcodec avformat"
3063 ffserver_deps="avformat fork sarestart"
3064 ffserver_select="ffm_muxer rtp_protocol rtsp_demuxer"
3065
3066 # documentation
3067 podpages_deps="perl"
3068 manpages_deps="perl pod2man"
3069 htmlpages_deps="perl"
3070 htmlpages_deps_any="makeinfo_html texi2html"
3071 txtpages_deps="perl makeinfo"
3072 doc_deps_any="manpages htmlpages podpages txtpages"
3073
3074 # default parameters
3075
3076 logfile="config.log"
3077
3078 # installation paths
3079 prefix_default="/usr/local"
3080 bindir_default='${prefix}/bin'
3081 datadir_default='${prefix}/share/ffmpeg'
3082 docdir_default='${prefix}/share/doc/ffmpeg'
3083 incdir_default='${prefix}/include'
3084 libdir_default='${prefix}/lib'
3085 mandir_default='${prefix}/share/man'
3086
3087 # toolchain
3088 ar_default="ar"
3089 cc_default="gcc"
3090 cxx_default="g++"
3091 host_cc_default="gcc"
3092 cp_f="cp -f"
3093 doxygen_default="doxygen"
3094 install="install"
3095 ln_s_default="ln -s -f"
3096 nm_default="nm -g"
3097 objformat="elf"
3098 pkg_config_default=pkg-config
3099 ranlib_default="ranlib"
3100 strip_default="strip"
3101 yasmexe_default="yasm"
3102 windres_default="windres"
3103
3104 # OS
3105 target_os_default=$(tolower $(uname -s))
3106 host_os=$target_os_default
3107
3108 # machine
3109 if test "$target_os_default" = aix; then
3110     arch_default=$(uname -p)
3111     strip_default="strip -X32_64"
3112 else
3113     arch_default=$(uname -m)
3114 fi
3115 cpu="generic"
3116 intrinsics="none"
3117
3118 # configurable options
3119 enable $PROGRAM_LIST
3120 enable $DOCUMENT_LIST
3121 enable $EXAMPLE_LIST
3122 enable $(filter_out avresample $LIBRARY_LIST)
3123 enable stripping
3124
3125 enable asm
3126 enable debug
3127 enable doc
3128 enable faan faandct faanidct
3129 enable optimizations
3130 enable runtime_cpudetect
3131 enable safe_bitstream_reader
3132 enable static
3133 enable swscale_alpha
3134 enable valgrind_backtrace
3135
3136 sws_max_filter_size_default=256
3137 set_default sws_max_filter_size
3138
3139 # Enable platform codecs by default.
3140 enable audiotoolbox
3141
3142 # Enable hwaccels by default.
3143 enable d3d11va dxva2 vaapi vda vdpau videotoolbox_hwaccel xvmc
3144 enable xlib
3145
3146 enable vda_framework videotoolbox videotoolbox_encoder
3147
3148 # build settings
3149 SHFLAGS='-shared -Wl,-soname,$$(@F)'
3150 LIBPREF="lib"
3151 LIBSUF=".a"
3152 FULLNAME='$(NAME)$(BUILDSUF)'
3153 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
3154 SLIBPREF="lib"
3155 SLIBSUF=".so"
3156 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
3157 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
3158 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
3159 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
3160 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
3161 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
3162
3163 asflags_filter=echo
3164 cflags_filter=echo
3165 ldflags_filter=echo
3166
3167 AS_C='-c'
3168 AS_O='-o $@'
3169 CC_C='-c'
3170 CC_E='-E -o $@'
3171 CC_O='-o $@'
3172 CXX_C='-c'
3173 CXX_O='-o $@'
3174 OBJCC_C='-c'
3175 OBJCC_E='-E -o $@'
3176 OBJCC_O='-o $@'
3177 LD_O='-o $@'
3178 LD_LIB='-l%'
3179 LD_PATH='-L'
3180 HOSTCC_C='-c'
3181 HOSTCC_E='-E -o $@'
3182 HOSTCC_O='-o $@'
3183 HOSTLD_O='-o $@'
3184
3185 host_libs='-lm'
3186 host_cflags_filter=echo
3187 host_ldflags_filter=echo
3188
3189 target_path='$(CURDIR)'
3190
3191 # since the object filename is not given with the -MM flag, the compiler
3192 # is only able to print the basename, and we must add the path ourselves
3193 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>/dev/null | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(@F),$(@D)/$(@F)," > $(@:.o=.d)'
3194 DEPFLAGS='-MM'
3195
3196 # find source path
3197 if test -f configure; then
3198     source_path=.
3199 else
3200     source_path=$(cd $(dirname "$0"); pwd)
3201     case "$source_path" in
3202         *[[:blank:]]*) die "Out of tree builds are impossible with whitespace in source path." ;;
3203     esac
3204     test -e "$source_path/config.h" &&
3205         die "Out of tree builds are impossible with config.h in source dir."
3206 fi
3207
3208 for v in "$@"; do
3209     r=${v#*=}
3210     l=${v%"$r"}
3211     r=$(sh_quote "$r")
3212     FFMPEG_CONFIGURATION="${FFMPEG_CONFIGURATION# } ${l}${r}"
3213 done
3214
3215 find_things(){
3216     thing=$1
3217     pattern=$2
3218     file=$source_path/$3
3219     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
3220 }
3221
3222 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
3223 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
3224 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
3225 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
3226 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
3227 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
3228 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
3229 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
3230 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
3231
3232 find_things_extern(){
3233     thing=$1
3234     pattern=$2
3235     file=$source_path/$3
3236     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
3237 }
3238
3239 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
3240 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
3241
3242 ALL_COMPONENTS="
3243     $BSF_LIST
3244     $DECODER_LIST
3245     $DEMUXER_LIST
3246     $ENCODER_LIST
3247     $FILTER_LIST
3248     $HWACCEL_LIST
3249     $INDEV_LIST
3250     $MUXER_LIST
3251     $OUTDEV_LIST
3252     $PARSER_LIST
3253     $PROTOCOL_LIST
3254 "
3255
3256 for n in $COMPONENT_LIST; do
3257     v=$(toupper ${n%s})_LIST
3258     eval enable \$$v
3259     eval ${n}_if_any="\$$v"
3260 done
3261
3262 enable $ARCH_EXT_LIST
3263
3264 die_unknown(){
3265     echo "Unknown option \"$1\"."
3266     echo "See $0 --help for available options."
3267     exit 1
3268 }
3269
3270 print_in_columns() {
3271     cols=$(expr $ncols / 24)
3272     cat | tr ' ' '\n' | sort | pr -r "-$cols" -w $ncols -t
3273 }
3274
3275 show_list() {
3276     suffix=_$1
3277     shift
3278     echo $* | sed s/$suffix//g | print_in_columns
3279     exit 0
3280 }
3281
3282 rand_list(){
3283     IFS=', '
3284     set -- $*
3285     unset IFS
3286     for thing; do
3287         comp=${thing%:*}
3288         prob=${thing#$comp}
3289         prob=${prob#:}
3290         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
3291         echo "prob ${prob:-0.5}"
3292         printf '%s\n' $comp
3293     done
3294 }
3295
3296 do_random(){
3297     action=$1
3298     shift
3299     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
3300     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
3301 }
3302
3303 for opt do
3304     optval="${opt#*=}"
3305     case "$opt" in
3306         --extra-ldflags=*)
3307             add_ldflags $optval
3308         ;;
3309         --extra-ldexeflags=*)
3310             add_ldexeflags $optval
3311         ;;
3312         --extra-ldlibflags=*)
3313             add_ldlibflags $optval
3314         ;;
3315         --extra-libs=*)
3316             add_extralibs $optval
3317         ;;
3318         --disable-devices)
3319             disable $INDEV_LIST $OUTDEV_LIST
3320         ;;
3321         --enable-debug=*)
3322             debuglevel="$optval"
3323         ;;
3324         --disable-programs)
3325             disable $PROGRAM_LIST
3326         ;;
3327         --disable-everything)
3328             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
3329         ;;
3330         --disable-all)
3331             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
3332             disable $LIBRARY_LIST $PROGRAM_LIST doc
3333             enable avutil
3334         ;;
3335         --enable-random|--disable-random)
3336             action=${opt%%-random}
3337             do_random ${action#--} $COMPONENT_LIST
3338         ;;
3339         --enable-random=*|--disable-random=*)
3340             action=${opt%%-random=*}
3341             do_random ${action#--} $optval
3342         ;;
3343         --enable-*=*|--disable-*=*)
3344             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
3345             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
3346             eval list=\$$(toupper $thing)_LIST
3347             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
3348             list=$(filter "$name" $list)
3349             [ "$list" = "" ] && warn "Option $opt did not match anything"
3350             $action $list
3351         ;;
3352         --enable-?*|--disable-?*)
3353             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
3354             if is_in $option $COMPONENT_LIST; then
3355                 test $action = disable && action=unset
3356                 eval $action \$$(toupper ${option%s})_LIST
3357             elif is_in $option $CMDLINE_SELECT; then
3358                 $action $option
3359             else
3360                 die_unknown $opt
3361             fi
3362         ;;
3363         --list-*)
3364             NAME="${opt#--list-}"
3365             is_in $NAME $COMPONENT_LIST || die_unknown $opt
3366             NAME=${NAME%s}
3367             eval show_list $NAME \$$(toupper $NAME)_LIST
3368         ;;
3369         --help|-h) show_help
3370         ;;
3371         --fatal-warnings) enable fatal_warnings
3372         ;;
3373         *)
3374             optname="${opt%%=*}"
3375             optname="${optname#--}"
3376             optname=$(echo "$optname" | sed 's/-/_/g')
3377             if is_in $optname $CMDLINE_SET; then
3378                 eval $optname='$optval'
3379             elif is_in $optname $CMDLINE_APPEND; then
3380                 append $optname "$optval"
3381             else
3382                 die_unknown $opt
3383             fi
3384         ;;
3385     esac
3386 done
3387
3388 for e in $env; do
3389     eval "export $e"
3390 done
3391
3392 disabled logging && logfile=/dev/null
3393
3394 # Disable all the library-specific components if the library itself
3395 # is disabled, see AVCODEC_LIST and following _LIST variables.
3396
3397 disable_components(){
3398     disabled ${1} && disable $(
3399         eval components="\$$(toupper ${1})_COMPONENTS"
3400         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
3401     )
3402 }
3403
3404 map 'disable_components $v' $LIBRARY_LIST
3405
3406 echo "# $0 $FFMPEG_CONFIGURATION" > $logfile
3407 set >> $logfile
3408
3409 test -n "$valgrind" && toolchain="valgrind-memcheck"
3410
3411 case "$toolchain" in
3412     *-asan)
3413         cc_default="${toolchain%-asan}"
3414         add_cflags  -fsanitize=address
3415         add_ldflags -fsanitize=address
3416     ;;
3417     *-msan)
3418         cc_default="${toolchain%-msan}"
3419         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
3420         add_ldflags -fsanitize=memory
3421     ;;
3422     *-tsan)
3423         cc_default="${toolchain%-tsan}"
3424         add_cflags  -fsanitize=thread -pie
3425         add_ldflags -fsanitize=thread -pie
3426         case "$toolchain" in
3427             gcc-tsan)
3428                 add_cflags  -fPIC
3429                 add_ldflags -fPIC
3430                 ;;
3431         esac
3432     ;;
3433     *-usan)
3434         cc_default="${toolchain%-usan}"
3435         add_cflags  -fsanitize=undefined
3436         add_ldflags -fsanitize=undefined
3437     ;;
3438     valgrind-*)
3439         target_exec_default="valgrind"
3440         case "$toolchain" in
3441             valgrind-massif)
3442                 target_exec_args="--tool=massif --alloc-fn=av_malloc --alloc-fn=av_mallocz --alloc-fn=av_calloc --alloc-fn=av_fast_padded_malloc --alloc-fn=av_fast_malloc --alloc-fn=av_realloc_f --alloc-fn=av_fast_realloc --alloc-fn=av_realloc"
3443                 ;;
3444             valgrind-memcheck)
3445                 target_exec_args="--error-exitcode=1 --malloc-fill=0x2a --track-origins=yes --leak-check=full --gen-suppressions=all --suppressions=$source_path/tests/fate-valgrind.supp"
3446                 ;;
3447         esac
3448     ;;
3449     msvc)
3450         # Check whether the current MSVC version needs the C99 converter.
3451         # From MSVC 2013 (compiler major version 18) onwards, it does actually
3452         # support enough of C99 to build ffmpeg. Default to the new
3453         # behaviour if the regexp was unable to match anything, since this
3454         # successfully parses the version number of existing supported
3455         # versions that require the converter (MSVC 2010 and 2012).
3456         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
3457         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
3458             cc_default="cl"
3459         else
3460             cc_default="c99wrap cl"
3461         fi
3462         ld_default="$source_path/compat/windows/mslink"
3463         nm_default="dumpbin -symbols"
3464         ar_default="lib"
3465         case "$arch" in
3466         arm*)
3467             as_default="armasm"
3468             ;;
3469         esac
3470         target_os_default="win32"
3471         # Use a relative path for TMPDIR. This makes sure all the
3472         # ffconf temp files are written with a relative path, avoiding
3473         # issues with msys/win32 path conversion for MSVC parameters
3474         # such as -Fo<file> or -out:<file>.
3475         TMPDIR=.
3476     ;;
3477     icl)
3478         cc_default="icl"
3479         ld_default="xilink"
3480         nm_default="dumpbin -symbols"
3481         ar_default="xilib"
3482         target_os_default="win32"
3483         TMPDIR=.
3484     ;;
3485     gcov)
3486         add_cflags  -fprofile-arcs -ftest-coverage
3487         add_ldflags -fprofile-arcs -ftest-coverage
3488     ;;
3489     llvm-cov)
3490         add_cflags -fprofile-arcs -ftest-coverage
3491         add_ldflags --coverage
3492     ;;
3493     hardened)
3494         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
3495         add_cflags   -fno-strict-overflow -fstack-protector-all
3496         add_ldflags  -Wl,-z,relro -Wl,-z,now
3497     ;;
3498     ?*)
3499         die "Unknown toolchain $toolchain"
3500     ;;
3501 esac
3502
3503 test -n "$cross_prefix" && enable cross_compile
3504
3505 if enabled cross_compile; then
3506     test -n "$arch" && test -n "$target_os" ||
3507         die "Must specify target arch and OS when cross-compiling"
3508 fi
3509
3510 ar_default="${cross_prefix}${ar_default}"
3511 cc_default="${cross_prefix}${cc_default}"
3512 cxx_default="${cross_prefix}${cxx_default}"
3513 nm_default="${cross_prefix}${nm_default}"
3514 pkg_config_default="${cross_prefix}${pkg_config_default}"
3515 if ${cross_prefix}${ranlib_default} 2>&1 | grep -q "\-D "; then
3516     ranlib_default="${cross_prefix}${ranlib_default} -D"
3517 else
3518     ranlib_default="${cross_prefix}${ranlib_default}"
3519 fi
3520 strip_default="${cross_prefix}${strip_default}"
3521 windres_default="${cross_prefix}${windres_default}"
3522
3523 sysinclude_default="${sysroot}/usr/include"
3524
3525 set_default arch cc cxx doxygen pkg_config ranlib strip sysinclude \
3526     target_exec target_os yasmexe
3527 enabled cross_compile || host_cc_default=$cc
3528 set_default host_cc
3529
3530 pkg_config_fail_message=""
3531 if ! $pkg_config --version >/dev/null 2>&1; then
3532     warn "$pkg_config not found, library detection may fail."
3533     pkg_config=false
3534 elif is_in -static $cc $LDFLAGS && ! is_in --static $pkg_config $pkg_config_flags; then
3535     pkg_config_fail_message="
3536 Note: When building a static binary, add --pkg-config-flags=\"--static\"."
3537 fi
3538
3539 if test $doxygen != $doxygen_default && \
3540   ! $doxygen --version >/dev/null 2>&1; then
3541     warn "Specified doxygen \"$doxygen\" not found, API documentation will fail to build."
3542 fi
3543
3544 exesuf() {
3545     case $1 in
3546         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
3547     esac
3548 }
3549
3550 EXESUF=$(exesuf $target_os)
3551 HOSTEXESUF=$(exesuf $host_os)
3552
3553 # set temporary file name
3554 : ${TMPDIR:=$TEMPDIR}
3555 : ${TMPDIR:=$TMP}
3556 : ${TMPDIR:=/tmp}
3557
3558 if [ -n "$tempprefix" ] ; then
3559     mktemp(){
3560         echo $tempprefix.${HOSTNAME}.${UID}
3561     }
3562 elif ! check_cmd mktemp -u XXXXXX; then
3563     # simple replacement for missing mktemp
3564     # NOT SAFE FOR GENERAL USE
3565     mktemp(){
3566         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
3567     }
3568 fi
3569
3570 tmpfile(){
3571     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
3572         (set -C; exec > $tmp) 2>/dev/null ||
3573         die "Unable to create temporary file in $TMPDIR."
3574     append TMPFILES $tmp
3575     eval $1=$tmp
3576 }
3577
3578 trap 'rm -f -- $TMPFILES' EXIT
3579
3580 tmpfile TMPASM .asm
3581 tmpfile TMPC   .c
3582 tmpfile TMPCPP .cpp
3583 tmpfile TMPE   $EXESUF
3584 tmpfile TMPH   .h
3585 tmpfile TMPM   .m
3586 tmpfile TMPO   .o
3587 tmpfile TMPS   .S
3588 tmpfile TMPSH  .sh
3589 tmpfile TMPV   .ver
3590
3591 unset -f mktemp
3592
3593 chmod +x $TMPE
3594
3595 # make sure we can execute files in $TMPDIR
3596 cat > $TMPSH 2>> $logfile <<EOF
3597 #! /bin/sh
3598 EOF
3599 chmod +x $TMPSH >> $logfile 2>&1
3600 if ! $TMPSH >> $logfile 2>&1; then
3601     cat <<EOF
3602 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
3603 variable to another directory and make sure that it is not mounted noexec.
3604 EOF
3605     die "Sanity test failed."
3606 fi
3607
3608 armasm_flags(){
3609     for flag; do
3610         case $flag in
3611             # Filter out MSVC cl.exe options from cflags that shouldn't
3612             # be passed to gas-preprocessor
3613             -M[TD]*)                                            ;;
3614             *)                  echo $flag                      ;;
3615         esac
3616    done
3617 }
3618
3619 ccc_flags(){
3620     for flag; do
3621         case $flag in
3622             -std=c99)           echo -c99                       ;;
3623             -mcpu=*)            echo -arch ${flag#*=}           ;;
3624             -mieee)             echo -ieee                      ;;
3625             -O*|-fast)          echo $flag                      ;;
3626             -fno-math-errno)    echo -assume nomath_errno       ;;
3627             -g)                 echo -g3                        ;;
3628             -Wall)              echo -msg_enable level2         ;;
3629             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
3630             -Wl,*)              echo $flag                      ;;
3631             -f*|-W*)                                            ;;
3632             *)                  echo $flag                      ;;
3633         esac
3634    done
3635 }
3636
3637 cparser_flags(){
3638     for flag; do
3639         case $flag in
3640             -Wno-switch)             echo -Wno-switch-enum ;;
3641             -Wno-format-zero-length) ;;
3642             -Wdisabled-optimization) ;;
3643             -Wno-pointer-sign)       echo -Wno-other ;;
3644             *)                       echo $flag ;;
3645         esac
3646     done
3647 }
3648
3649 msvc_common_flags(){
3650     for flag; do
3651         case $flag in
3652             # In addition to specifying certain flags under the compiler
3653             # specific filters, they must be specified here as well or else the
3654             # generic catch all at the bottom will print the original flag.
3655             -Wall)                ;;
3656             -std=c99)             ;;
3657             # Common flags
3658             -fomit-frame-pointer) ;;
3659             -g)                   echo -Z7 ;;
3660             -fno-math-errno)      ;;
3661             -fno-common)          ;;
3662             -fno-signed-zeros)    ;;
3663             -fPIC)                ;;
3664             -mthumb)              ;;
3665             -march=*)             ;;
3666             -lz)                  echo zlib.lib ;;
3667             -lavifil32)           echo vfw32.lib ;;
3668             -lavicap32)           echo vfw32.lib user32.lib ;;
3669             -lx264)               echo libx264.lib ;;
3670             -l*)                  echo ${flag#-l}.lib ;;
3671             -LARGEADDRESSAWARE)   echo $flag ;;
3672             -L*)                  echo -libpath:${flag#-L} ;;
3673             *)                    echo $flag ;;
3674         esac
3675     done
3676 }
3677
3678 msvc_flags(){
3679     msvc_common_flags "$@"
3680     for flag; do
3681         case $flag in
3682             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3683                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3684                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3685                                        -wd4307 \
3686                                        -wd4273 -wd4554 -wd4701 ;;
3687         esac
3688     done
3689 }
3690
3691 icl_flags(){
3692     msvc_common_flags "$@"
3693     for flag; do
3694         case $flag in
3695             # Despite what Intel's documentation says -Wall, which is supported
3696             # on Windows, does enable remarks so disable them here.
3697             -Wall)                echo $flag -Qdiag-disable:remark ;;
3698             -std=c99)             echo -Qstd=c99 ;;
3699             -flto)                echo -ipo ;;
3700         esac
3701     done
3702 }
3703
3704 icc_flags(){
3705     for flag; do
3706         case $flag in
3707             -flto)                echo -ipo ;;
3708             *)                    echo $flag ;;
3709         esac
3710     done
3711 }
3712
3713 pgi_flags(){
3714     for flag; do
3715         case $flag in
3716             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3717             -fomit-frame-pointer) echo -Mnoframe ;;
3718             -g)                   echo -gopt ;;
3719             *)                    echo $flag ;;
3720         esac
3721     done
3722 }
3723
3724 suncc_flags(){
3725     for flag; do
3726         case $flag in
3727             -march=*|-mcpu=*)
3728                 case "${flag#*=}" in
3729                     native)                   echo -xtarget=native       ;;
3730                     v9|niagara)               echo -xarch=sparc          ;;
3731                     ultrasparc)               echo -xarch=sparcvis       ;;
3732                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3733                     i586|pentium)             echo -xchip=pentium        ;;
3734                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3735                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3736                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3737                     pentium4*)          echo -xtarget=pentium4           ;;
3738                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3739                     *-sse3)             echo -xarch=sse3                 ;;
3740                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3741                     bonnell)                   echo -xarch=ssse3         ;;
3742                     corei7|nehalem)            echo -xtarget=nehalem     ;;
3743                     westmere)                  echo -xtarget=westmere    ;;
3744                     silvermont)                echo -xarch=sse4_2        ;;
3745                     corei7-avx|sandybridge)    echo -xtarget=sandybridge ;;
3746                     core-avx*|ivybridge|haswell|broadwell)
3747                                                echo -xarch=avx           ;;
3748                     amdfam10|barcelona)        echo -xtarget=barcelona   ;;
3749                     btver1)                    echo -xarch=amdsse4a      ;;
3750                     btver2|bdver*)             echo -xarch=avx           ;;
3751                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3752                     k8|opteron|athlon64|athlon-fx)
3753                                                echo -xarch=sse2a         ;;
3754                     athlon*)                   echo -xarch=pentium_proa  ;;
3755                 esac
3756                 ;;
3757             -std=c99)             echo -xc99              ;;
3758             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3759             -fPIC)                echo -KPIC -xcode=pic32 ;;
3760             -W*,*)                echo $flag              ;;
3761             -f*-*|-W*|-mimpure-text)                      ;;
3762             -shared)              echo -G                 ;;
3763             *)                    echo $flag              ;;
3764         esac
3765     done
3766 }
3767
3768 tms470_flags(){
3769     for flag; do
3770         case $flag in
3771             -march=*|-mcpu=*)
3772                 case "${flag#*=}" in
3773                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3774                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3775                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3776                     armv6*|arm11*)          echo -mv=6   ;;
3777                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3778                                             echo -mv=5e  ;;
3779                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3780                 esac
3781                 ;;
3782             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3783             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3784             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3785             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3786             -msoft-float)   echo --float_support=vfplib       ;;
3787             -O[0-3]|-mf=*)  echo $flag                        ;;
3788             -g)             echo -g -mn                       ;;
3789             -pds=*)         echo $flag                        ;;
3790             -D*|-I*)        echo $flag                        ;;
3791             --gcc|--abi=*)  echo $flag                        ;;
3792             -me)            echo $flag                        ;;
3793         esac
3794     done
3795 }
3796
3797 probe_cc(){
3798     pfx=$1
3799     _cc=$2
3800     first=$3
3801
3802     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3803     unset _ld_o _ldflags _ld_lib _ld_path
3804     unset _depflags _DEPCMD _DEPFLAGS
3805     _flags_filter=echo
3806
3807     if $_cc --version 2>&1 | grep -q '^GNU assembler'; then
3808         true # no-op to avoid reading stdin in following checks
3809     elif $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3810         _type=llvm_gcc
3811         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3812         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3813         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3814         _cflags_speed='-O3'
3815         _cflags_size='-Os'
3816     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3817         _type=gcc
3818         gcc_version=$($_cc --version | head -n1)
3819         gcc_basever=$($_cc -dumpversion)
3820         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3821         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3822         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3823         case $gcc_basever in
3824             2) ;;
3825             2.*) ;;
3826             *) _depflags='-MMD -MF $(@:.o=.d) -MT $@' ;;
3827         esac
3828         if [ "$first" = true ]; then
3829             case $gcc_basever in
3830                 4.2*)
3831                 warn "gcc 4.2 is outdated and may miscompile FFmpeg. Please use a newer compiler." ;;
3832             esac
3833         fi
3834         _cflags_speed='-O3'
3835         _cflags_size='-Os'
3836     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3837         _type=icc
3838         _ident=$($_cc --version | head -n1)
3839         _depflags='-MMD'
3840         _cflags_speed='-O3'
3841         _cflags_size='-Os'
3842         _cflags_noopt='-O1'
3843         _flags_filter=icc_flags
3844     elif $_cc -v 2>&1 | grep -q xlc; then
3845         _type=xlc
3846         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3847         _cflags_speed='-O5'
3848         _cflags_size='-O5 -qcompact'
3849     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3850         _type=ccc
3851         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3852         _DEPFLAGS='-M'
3853         _cflags_speed='-fast'
3854         _cflags_size='-O1'
3855         _flags_filter=ccc_flags
3856     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3857         test -d "$sysroot" || die "No valid sysroot specified."
3858         _type=armcc
3859         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3860         armcc_conf="$PWD/armcc.conf"
3861         $_cc --arm_linux_configure                 \
3862              --arm_linux_config_file="$armcc_conf" \
3863              --configure_sysroot="$sysroot"        \
3864              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3865              die "Error creating armcc configuration file."
3866         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3867         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3868         as_default="${cross_prefix}gcc"
3869         _depflags='-MMD'
3870         _cflags_speed='-O3'
3871         _cflags_size='-Os'
3872     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3873         _type=tms470
3874         _ident=$($_cc -version | head -n1 | tr -s ' ')
3875         _flags='--gcc --abi=eabi -me'
3876         _cc_e='-ppl -fe=$@'
3877         _cc_o='-fe=$@'
3878         _depflags='-ppa -ppd=$(@:.o=.d)'
3879         _cflags_speed='-O3 -mf=5'
3880         _cflags_size='-O3 -mf=2'
3881         _flags_filter=tms470_flags
3882     elif $_cc -v 2>&1 | grep -q clang; then
3883         _type=clang
3884         _ident=$($_cc --version 2>/dev/null | head -n1)
3885         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3886         _cflags_speed='-O3'
3887         _cflags_size='-Os'
3888     elif $_cc -V 2>&1 | grep -q Sun; then
3889         _type=suncc
3890         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3891         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3892         _DEPFLAGS='-xM1 -xc99'
3893         _ldflags='-std=c99'
3894         _cflags_speed='-O5'
3895         _cflags_size='-O5 -xspace'
3896         _flags_filter=suncc_flags
3897     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3898         _type=pathscale
3899         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3900         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3901         _cflags_speed='-O2'
3902         _cflags_size='-Os'
3903         _flags_filter='filter_out -Wdisabled-optimization'
3904     elif $_cc -v 2>&1 | grep -q Open64; then
3905         _type=open64
3906         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3907         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3908         _cflags_speed='-O2'
3909         _cflags_size='-Os'
3910         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3911     elif $_cc -V 2>&1 | grep -q Portland; then
3912         _type=pgi
3913         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3914         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3915         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3916         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3917         _cflags_noopt="-O"
3918         _flags_filter=pgi_flags
3919     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3920         _type=armasm
3921         _ident=$($_cc | head -n1)
3922         # 4509: "This form of conditional instruction is deprecated"
3923         _flags="-nologo -ignore 4509"
3924         _flags_filter=armasm_flags
3925     elif $_cc 2>&1 | grep -q Intel; then
3926         _type=icl
3927         _ident=$($_cc 2>&1 | head -n1)
3928         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3929         # Not only is O3 broken on 13.x+ but it is slower on all previous
3930         # versions (tested) as well.
3931         _cflags_speed="-O2"
3932         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3933         if $_cc 2>&1 | grep -q Linker; then
3934             _ld_o='-out:$@'
3935         else
3936             _ld_o='-Fe$@'
3937         fi
3938         _cc_o='-Fo$@'
3939         _cc_e='-P'
3940         _flags_filter=icl_flags
3941         _ld_lib='lib%.a'
3942         _ld_path='-libpath:'
3943         # -Qdiag-error to make icl error when seeing certain unknown arguments
3944         _flags='-nologo -Qdiag-error:4044,10157'
3945         # -Qvec- -Qsimd- to prevent miscompilation, -GS, fp:precise for consistency
3946         # with MSVC which enables it by default.
3947         _cflags='-D_USE_MATH_DEFINES -Qms0 -Qvec- -Qsimd- -GS -fp:precise'
3948         disable stripping
3949     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3950         _type=msvc
3951         _ident=$($_cc 2>&1 | head -n1)
3952         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3953         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3954         _cflags_speed="-O2"
3955         _cflags_size="-O1"
3956         if $_cc -nologo- 2>&1 | grep -q Linker; then
3957             _ld_o='-out:$@'
3958         else
3959             _ld_o='-Fe$@'
3960         fi
3961         _cc_o='-Fo$@'
3962         _cc_e='-P -Fi$@'
3963         _flags_filter=msvc_flags
3964         _ld_lib='lib%.a'
3965         _ld_path='-libpath:'
3966         _flags='-nologo'
3967         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS'
3968         disable stripping
3969     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3970         _type=cparser
3971         _ident=$($_cc --version | head -n1)
3972         _depflags='-MMD'
3973         _cflags_speed='-O4'
3974         _cflags_size='-O2'
3975         _flags_filter=cparser_flags
3976     fi
3977
3978     eval ${pfx}_type=\$_type
3979     eval ${pfx}_ident=\$_ident
3980 }
3981
3982 set_ccvars(){
3983     eval ${1}_C=\${_cc_c-\${${1}_C}}
3984     eval ${1}_E=\${_cc_e-\${${1}_E}}
3985     eval ${1}_O=\${_cc_o-\${${1}_O}}
3986
3987     if [ -n "$_depflags" ]; then
3988         eval ${1}_DEPFLAGS=\$_depflags
3989     else
3990         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3991         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3992         eval DEP${1}FLAGS=\$_flags
3993     fi
3994 }
3995
3996 probe_cc cc "$cc" "true"
3997 cflags_filter=$_flags_filter
3998 cflags_speed=$_cflags_speed
3999 cflags_size=$_cflags_size
4000 cflags_noopt=$_cflags_noopt
4001 add_cflags $_flags $_cflags
4002 cc_ldflags=$_ldflags
4003 set_ccvars CC
4004
4005 probe_cc hostcc "$host_cc"
4006 host_cflags_filter=$_flags_filter
4007 add_host_cflags  $_flags $_cflags
4008 set_ccvars HOSTCC
4009
4010 test -n "$cc_type" && enable $cc_type ||
4011     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
4012
4013 : ${as_default:=$cc}
4014 : ${objcc_default:=$cc}
4015 : ${dep_cc_default:=$cc}
4016 : ${ld_default:=$cc}
4017 : ${host_ld_default:=$host_cc}
4018 set_default ar as objcc dep_cc ld ln_s host_ld windres
4019
4020 probe_cc as "$as"
4021 asflags_filter=$_flags_filter
4022 add_asflags $_flags $_cflags
4023 set_ccvars AS
4024
4025 probe_cc objcc "$objcc"
4026 objcflags_filter=$_flags_filter
4027 add_objcflags $_flags $_cflags
4028 set_ccvars OBJC
4029
4030 probe_cc ld "$ld"
4031 ldflags_filter=$_flags_filter
4032 add_ldflags $_flags $_ldflags
4033 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
4034 LD_O=${_ld_o-$LD_O}
4035 LD_LIB=${_ld_lib-$LD_LIB}
4036 LD_PATH=${_ld_path-$LD_PATH}
4037
4038 probe_cc hostld "$host_ld"
4039 host_ldflags_filter=$_flags_filter
4040 add_host_ldflags $_flags $_ldflags
4041 HOSTLD_O=${_ld_o-$HOSTLD_O}
4042
4043 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
4044     probe_cc depcc "$dep_cc"
4045     CCDEP=${_DEPCMD:-$DEPCMD}
4046     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
4047     DEPCCFLAGS=$_flags
4048 fi
4049
4050 if $ar 2>&1 | grep -q Microsoft; then
4051     arflags="-nologo"
4052     ar_o='-out:$@'
4053 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
4054     arflags="rq"
4055     ar_o='$@'
4056 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
4057     arflags='-Xany -r -c'
4058     ar_o='$@'
4059 elif $ar 2>&1 | grep -q "\[D\] "; then
4060     arflags="rcD"
4061     ar_o='$@'
4062 else
4063     arflags="rc"
4064     ar_o='$@'
4065 fi
4066
4067 add_cflags $extra_cflags
4068 add_cxxflags $extra_cxxflags
4069 add_objcflags $extra_objcflags
4070 add_asflags $extra_cflags
4071
4072 if test -n "$sysroot"; then
4073     case "$cc_type" in
4074         gcc|llvm_gcc|clang)
4075             add_cppflags --sysroot="$sysroot"
4076             add_ldflags --sysroot="$sysroot"
4077 # On Darwin --sysroot may be ignored, -isysroot always affects headers and linking
4078             add_cppflags -isysroot "$sysroot"
4079             add_ldflags -isysroot "$sysroot"
4080         ;;
4081         tms470)
4082             add_cppflags -I"$sysinclude"
4083             add_ldflags  --sysroot="$sysroot"
4084         ;;
4085     esac
4086 fi
4087
4088 if test "$cpu" = host; then
4089     enabled cross_compile &&
4090         die "--cpu=host makes no sense when cross-compiling."
4091
4092     case "$cc_type" in
4093         gcc|llvm_gcc)
4094             check_native(){
4095                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
4096                 sed -n "/cc1.*$1=/{
4097                             s/.*$1=\\([^ ]*\\).*/\\1/
4098                             p
4099                             q
4100                         }" $TMPE
4101             }
4102             cpu=$(check_native -march || check_native -mcpu)
4103         ;;
4104         clang)
4105             check_native(){
4106                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
4107                 sed -n "/cc1.*-target-cpu /{
4108                             s/.*-target-cpu \\([^ ]*\\).*/\\1/
4109                             p
4110                             q
4111                         }" $TMPE
4112             }
4113             cpu=$(check_native -march)
4114         ;;
4115     esac
4116
4117     test "${cpu:-host}" = host &&
4118         die "--cpu=host not supported with compiler $cc"
4119 fi
4120
4121 # Deal with common $arch aliases
4122 case "$arch" in
4123     aarch64|arm64)
4124         arch="aarch64"
4125     ;;
4126     arm*|iPad*|iPhone*)
4127         arch="arm"
4128     ;;
4129     mips*|IP*)
4130         case "$arch" in
4131         *el)
4132             add_cppflags -EL
4133             add_ldflags -EL
4134         ;;
4135         *eb)
4136             add_cppflags -EB
4137             add_ldflags -EB
4138         ;;
4139         esac
4140         arch="mips"
4141     ;;
4142     parisc*|hppa*)
4143         arch="parisc"
4144     ;;
4145     "Power Macintosh"|ppc*|powerpc*)
4146         arch="ppc"
4147     ;;
4148     s390|s390x)
4149         arch="s390"
4150     ;;
4151     sh4|sh)
4152         arch="sh4"
4153     ;;
4154     sun4u|sparc*)
4155         arch="sparc"
4156     ;;
4157     tilegx|tile-gx)
4158         arch="tilegx"
4159     ;;
4160     i[3-6]86*|i86pc|BePC|x86pc|x86_64|x86_32|amd64)
4161         arch="x86"
4162     ;;
4163 esac
4164
4165 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
4166 enable $arch
4167
4168 # Add processor-specific flags
4169 if enabled aarch64; then
4170
4171     case $cpu in
4172         armv*)
4173             cpuflags="-march=$cpu"
4174         ;;
4175         *)
4176             cpuflags="-mcpu=$cpu"
4177         ;;
4178     esac
4179
4180 elif enabled alpha; then
4181
4182     cpuflags="-mcpu=$cpu"
4183
4184 elif enabled arm; then
4185
4186     check_arm_arch() {
4187         check_cpp_condition stddef.h \
4188             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
4189             $cpuflags
4190     }
4191
4192     probe_arm_arch() {
4193         if   check_arm_arch 4;        then echo armv4;
4194         elif check_arm_arch 4T;       then echo armv4t;
4195         elif check_arm_arch 5;        then echo armv5;
4196         elif check_arm_arch 5E;       then echo armv5e;
4197         elif check_arm_arch 5T;       then echo armv5t;
4198         elif check_arm_arch 5TE;      then echo armv5te;
4199         elif check_arm_arch 5TEJ;     then echo armv5te;
4200         elif check_arm_arch 6;        then echo armv6;
4201         elif check_arm_arch 6J;       then echo armv6j;
4202         elif check_arm_arch 6K;       then echo armv6k;
4203         elif check_arm_arch 6Z;       then echo armv6z;
4204         elif check_arm_arch 6ZK;      then echo armv6zk;
4205         elif check_arm_arch 6T2;      then echo armv6t2;
4206         elif check_arm_arch 7;        then echo armv7;
4207         elif check_arm_arch 7A  7_A;  then echo armv7-a;
4208         elif check_arm_arch 7S;       then echo armv7-a;
4209         elif check_arm_arch 7R  7_R;  then echo armv7-r;
4210         elif check_arm_arch 7M  7_M;  then echo armv7-m;
4211         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
4212         elif check_arm_arch 8A  8_A;  then echo armv8-a;
4213         fi
4214     }
4215
4216     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
4217
4218     case $cpu in
4219         armv*)
4220             cpuflags="-march=$cpu"
4221             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
4222         ;;
4223         *)
4224             cpuflags="-mcpu=$cpu"
4225             case $cpu in
4226                 cortex-a*)                               subarch=armv7a  ;;
4227                 cortex-r*)                               subarch=armv7r  ;;
4228                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
4229                 arm11*)                                  subarch=armv6   ;;
4230                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
4231                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
4232                 *)                             subarch=$(probe_arm_arch) ;;
4233             esac
4234         ;;
4235     esac
4236
4237     case "$subarch" in
4238         armv5t*)    enable fast_clz                ;;
4239         armv[6-8]*)
4240             enable fast_clz
4241             disabled fast_unaligned || enable fast_unaligned
4242             ;;
4243     esac
4244
4245 elif enabled avr32; then
4246
4247     case $cpu in
4248         ap7[02]0[0-2])
4249             subarch="avr32_ap"
4250             cpuflags="-mpart=$cpu"
4251         ;;
4252         ap)
4253             subarch="avr32_ap"
4254             cpuflags="-march=$cpu"
4255         ;;
4256         uc3[ab]*)
4257             subarch="avr32_uc"
4258             cpuflags="-mcpu=$cpu"
4259         ;;
4260         uc)
4261             subarch="avr32_uc"
4262             cpuflags="-march=$cpu"
4263         ;;
4264     esac
4265
4266 elif enabled bfin; then
4267
4268     cpuflags="-mcpu=$cpu"
4269
4270 elif enabled mips; then
4271
4272     cpuflags="-march=$cpu"
4273
4274     if [ "$cpu" != "generic" ]; then
4275         disable mips32r2
4276         disable mips32r5
4277         disable mips64r2
4278         disable mips32r6
4279         disable mips64r6
4280         disable loongson2
4281         disable loongson3
4282
4283         case $cpu in
4284             24kc|24kf*|24kec|34kc|1004kc|24kef*|34kf*|1004kf*|74kc|74kf)
4285                 enable mips32r2
4286                 disable msa
4287             ;;
4288             p5600|i6400)
4289                 disable mipsdsp
4290                 disable mipsdspr2
4291             ;;
4292             loongson*)
4293                 enable loongson2
4294                 enable loongson3
4295                 enable local_aligned_8 local_aligned_16 local_aligned_32
4296                 enable simd_align_16
4297                 enable fast_64bit
4298                 enable fast_clz
4299                 enable fast_cmov
4300                 enable fast_unaligned
4301                 disable aligned_stack
4302                 case $cpu in
4303                     loongson3*)
4304                         cpuflags="-march=loongson3a -mhard-float -fno-expensive-optimizations"
4305                     ;;
4306                     loongson2e)
4307                         cpuflags="-march=loongson2e -mhard-float -fno-expensive-optimizations"
4308                     ;;
4309                     loongson2f)
4310                         cpuflags="-march=loongson2f -mhard-float -fno-expensive-optimizations"
4311                     ;;
4312                 esac
4313             ;;
4314             *)
4315                 # Unknown CPU. Disable everything.
4316                 warn "unknown CPU. Disabling all MIPS optimizations."
4317                 disable mipsfpu
4318                 disable mipsdsp
4319                 disable mipsdspr2
4320                 disable msa
4321                 disable mmi
4322             ;;
4323         esac
4324
4325         case $cpu in
4326             24kc)
4327                 disable mipsfpu
4328                 disable mipsdsp
4329                 disable mipsdspr2
4330             ;;
4331             24kf*)
4332                 disable mipsdsp
4333                 disable mipsdspr2
4334             ;;
4335             24kec|34kc|1004kc)
4336                 disable mipsfpu
4337                 disable mipsdspr2
4338             ;;
4339             24kef*|34kf*|1004kf*)
4340                 disable mipsdspr2
4341             ;;
4342             74kc)
4343                 disable mipsfpu
4344             ;;
4345             p5600)
4346                 enable mips32r5
4347                 check_cflags "-mtune=p5600" && check_cflags "-msched-weight -mload-store-pairs -funroll-loops"
4348             ;;
4349             i6400)
4350                 enable mips64r6
4351                 check_cflags "-mtune=i6400 -mabi=64" && check_cflags "-msched-weight -mload-store-pairs -funroll-loops" && check_ldflags "-mabi=64"
4352             ;;
4353         esac
4354     else
4355         # We do not disable anything. Is up to the user to disable the unwanted features.
4356         warn 'generic cpu selected'
4357     fi
4358
4359 elif enabled ppc; then
4360
4361     disable ldbrx
4362
4363     case $(tolower $cpu) in
4364         601|ppc601|powerpc601)
4365             cpuflags="-mcpu=601"
4366             disable altivec
4367         ;;
4368         603*|ppc603*|powerpc603*)
4369             cpuflags="-mcpu=603"
4370             disable altivec
4371         ;;
4372         604*|ppc604*|powerpc604*)
4373             cpuflags="-mcpu=604"
4374             disable altivec
4375         ;;
4376         g3|75*|ppc75*|powerpc75*)
4377             cpuflags="-mcpu=750"
4378             disable altivec
4379         ;;
4380         g4|745*|ppc745*|powerpc745*)
4381             cpuflags="-mcpu=7450"
4382             disable vsx
4383         ;;
4384         74*|ppc74*|powerpc74*)
4385             cpuflags="-mcpu=7400"
4386             disable vsx
4387         ;;
4388         g5|970|ppc970|powerpc970)
4389             cpuflags="-mcpu=970"
4390             disable vsx
4391         ;;
4392         power[3-6]*)
4393             cpuflags="-mcpu=$cpu"
4394             disable vsx
4395         ;;
4396         power[7-8]*)
4397             cpuflags="-mcpu=$cpu"
4398         ;;
4399         cell)
4400             cpuflags="-mcpu=cell"
4401             enable ldbrx
4402             disable vsx
4403         ;;
4404         e500mc)
4405             cpuflags="-mcpu=e500mc"
4406             disable altivec
4407         ;;
4408         e500v2)
4409             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
4410             disable altivec
4411             disable dcbzl
4412         ;;
4413         e500)
4414             cpuflags="-mcpu=8540 -mhard-float"
4415             disable altivec
4416             disable dcbzl
4417         ;;
4418     esac
4419
4420 elif enabled sparc; then
4421
4422     case $cpu in
4423         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
4424             cpuflags="-mcpu=$cpu"
4425         ;;
4426         ultrasparc*|niagara[234])
4427             cpuflags="-mcpu=$cpu"
4428         ;;
4429     esac
4430
4431 elif enabled x86; then
4432
4433     case $cpu in
4434         i[345]86|pentium)
4435             cpuflags="-march=$cpu"
4436             disable i686
4437             disable mmx
4438         ;;
4439         # targets that do NOT support nopl and conditional mov (cmov)
4440         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
4441             cpuflags="-march=$cpu"
4442             disable i686
4443         ;;
4444         # targets that do support nopl and conditional mov (cmov)
4445         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx\
4446         |core*|atom|bonnell|nehalem|westmere|silvermont|sandybridge|ivybridge|haswell|broadwell|amdfam10|barcelona|b[dt]ver*)
4447             cpuflags="-march=$cpu"
4448             enable i686
4449             enable fast_cmov
4450         ;;
4451         # targets that do support conditional mov but on which it's slow
4452         pentium4|pentium4m|prescott|nocona)
4453             cpuflags="-march=$cpu"
4454             enable i686
4455             disable fast_cmov
4456         ;;
4457     esac
4458
4459 fi
4460
4461 if [ "$cpu" != generic ]; then
4462     add_cflags  $cpuflags
4463     add_asflags $cpuflags
4464     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
4465 fi
4466
4467 # compiler sanity check
4468 check_exec <<EOF
4469 int main(void){ return 0; }
4470 EOF
4471 if test "$?" != 0; then
4472     echo "$cc is unable to create an executable file."
4473     if test -z "$cross_prefix" && ! enabled cross_compile ; then
4474         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
4475         echo "Only do this if you know what cross compiling means."
4476     fi
4477     die "C compiler test failed."
4478 fi
4479
4480 add_cppflags -D_ISOC99_SOURCE
4481 add_cxxflags -D__STDC_CONSTANT_MACROS
4482 check_cflags -std=c99
4483 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
4484 #include <stdlib.h>
4485 EOF
4486 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
4487 #include <stdlib.h>
4488 EOF
4489
4490 add_host_cppflags -D_ISOC99_SOURCE
4491 check_host_cflags -std=c99
4492 check_host_cflags -Wall
4493 check_host_cflags -O3
4494
4495 check_64bit(){
4496     arch32=$1
4497     arch64=$2
4498     expr=$3
4499     check_code cc "" "int test[2*($expr) - 1]" &&
4500         subarch=$arch64 || subarch=$arch32
4501 }
4502
4503 case "$arch" in
4504     aarch64|alpha|ia64)
4505         spic=$shared
4506     ;;
4507     mips)
4508         check_64bit mips mips64 '_MIPS_SIM > 1'
4509         spic=$shared
4510     ;;
4511     parisc)
4512         check_64bit parisc parisc64 'sizeof(void *) > 4'
4513         spic=$shared
4514     ;;
4515     ppc)
4516         check_64bit ppc ppc64 'sizeof(void *) > 4'
4517         spic=$shared
4518     ;;
4519     s390)
4520         check_64bit s390 s390x 'sizeof(void *) > 4'
4521         spic=$shared
4522     ;;
4523     sparc)
4524         check_64bit sparc sparc64 'sizeof(void *) > 4'
4525         spic=$shared
4526     ;;
4527     x86)
4528         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
4529         # Treat x32 as x64 for now. Note it also needs spic=$shared
4530         test "$subarch" = "x86_32" && check_cpp_condition stddef.h 'defined(__x86_64__)' &&
4531             subarch=x86_64
4532         if test "$subarch" = "x86_64"; then
4533             spic=$shared
4534         fi
4535     ;;
4536     ppc)
4537         check_cc <<EOF && subarch="ppc64"
4538         int test[(int)sizeof(char*) - 7];
4539 EOF
4540     ;;
4541 esac
4542
4543 enable $subarch
4544 enabled spic && enable_weak pic
4545
4546 # OS specific
4547 case $target_os in
4548     aix)
4549         SHFLAGS=-shared
4550         add_cppflags '-I\$(SRC_PATH)/compat/aix'
4551         enabled shared && add_ldflags -Wl,-brtl
4552         ;;
4553     android)
4554         disable symver
4555         enable section_data_rel_ro
4556         SLIB_INSTALL_NAME='$(SLIBNAME)'
4557         SLIB_INSTALL_LINKS=
4558         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
4559         ;;
4560     haiku)
4561         prefix_default="/boot/common"
4562         network_extralibs="-lnetwork"
4563         host_libs=
4564         ;;
4565     sunos)
4566         SHFLAGS='-shared -Wl,-h,$$(@F)'
4567         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
4568         network_extralibs="-lsocket -lnsl"
4569         add_cppflags -D__EXTENSIONS__
4570         # When using suncc to build, the Solaris linker will mark
4571         # an executable with each instruction set encountered by
4572         # the Solaris assembler.  As our libraries contain their own
4573         # guards for processor-specific code, instead suppress
4574         # generation of the HWCAPS ELF section on Solaris x86 only.
4575         enabled_all suncc x86 &&
4576             echo "hwcap_1 = OVERRIDE;" > mapfile &&
4577             add_ldflags -Wl,-M,mapfile
4578         nm_default='nm -P -g'
4579         SLIB_CREATE_DEF_CMD='$(Q)perl $(SRC_PATH)/compat/solaris/make_sunver.pl $$(filter %.ver,$$^) $(OBJS) | grep -v @ > $(SUBDIR)lib$(NAME).ver-sol2'
4580         ;;
4581     netbsd)
4582         disable symver
4583         oss_indev_extralibs="-lossaudio"
4584         oss_outdev_extralibs="-lossaudio"
4585         enabled gcc || check_ldflags -Wl,-zmuldefs
4586         ;;
4587     openbsd|bitrig)
4588         disable symver
4589         SHFLAGS='-shared'
4590         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
4591         SLIB_INSTALL_LINKS=
4592         oss_indev_extralibs="-lossaudio"
4593         oss_outdev_extralibs="-lossaudio"
4594         ;;
4595     dragonfly)
4596         disable symver
4597         ;;
4598     freebsd)
4599         ;;
4600     bsd/os)
4601         add_extralibs -lpoll -lgnugetopt
4602         strip="strip -d"
4603         ;;
4604     darwin)
4605         enabled ppc && add_asflags -force_cpusubtype_ALL
4606         install_name_dir_default='$(SHLIBDIR)'
4607         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(INSTALL_NAME_DIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
4608         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
4609         strip="${strip} -x"
4610         add_ldflags -Wl,-dynamic,-search_paths_first
4611         SLIBSUF=".dylib"
4612         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
4613         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
4614         objformat="macho"
4615         enabled x86_64 && objformat="macho64"
4616         enabled_any pic shared x86_64 ||
4617             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
4618         check_header dispatch/dispatch.h
4619         ;;
4620     msys*)
4621         die "Native MSYS builds are discouraged, please use the MINGW environment.";
4622         ;;
4623     mingw32*|mingw64*)
4624         if test $target_os = "mingw32ce"; then
4625             disable network
4626         else
4627             target_os=mingw32
4628         fi
4629         decklink_outdev_extralibs="$decklink_outdev_extralibs -lole32 -loleaut32"
4630         decklink_indev_extralibs="$decklink_indev_extralibs -lole32 -loleaut32"
4631         LIBTARGET=i386
4632         if enabled x86_64; then
4633             LIBTARGET="i386:x86-64"
4634         elif enabled arm; then
4635             LIBTARGET=arm-wince
4636         fi
4637         enabled shared && ! enabled small && check_cmd $windres --version && enable gnu_windres
4638         enabled x86_32 && check_ldflags -Wl,--large-address-aware
4639         shlibdir_default="$bindir_default"
4640         SLIBPREF=""
4641         SLIBSUF=".dll"
4642         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
4643         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
4644         dlltool="${cross_prefix}dlltool"
4645         if check_cmd lib.exe -list; then
4646             SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); lib.exe /machine:$(LIBTARGET) /def:$$(@:$(SLIBSUF)=.def) /out:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
4647             if enabled x86_64; then
4648                 LIBTARGET=x64
4649             fi
4650         elif check_cmd $dlltool --version; then
4651             SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
4652         fi
4653         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4654         SLIB_INSTALL_LINKS=
4655         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
4656         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
4657         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--disable-auto-image-base'
4658         objformat="win32"
4659         ranlib=:
4660         enable dos_paths
4661         check_ldflags -Wl,--nxcompat,--dynamicbase
4662         # Lets work around some stupidity in binutils.
4663         # ld will strip relocations from executables even though we need them
4664         # for dynamicbase (ASLR).  Using -pie does retain the reloc section
4665         # however ld then forgets what the entry point should be (oops) so we
4666         # have to manually (re)set it.
4667         if enabled x86_32; then
4668             disabled debug && add_ldexeflags -Wl,--pic-executable,-e,_mainCRTStartup
4669         elif enabled x86_64; then
4670             disabled debug && add_ldexeflags -Wl,--pic-executable,-e,mainCRTStartup
4671             check_ldflags -Wl,--high-entropy-va # binutils 2.25
4672             # Set image base >4GB for extra entropy with HEASLR
4673             add_ldexeflags -Wl,--image-base,0x140000000
4674             append SHFLAGS -Wl,--image-base,0x180000000
4675         fi
4676         ;;
4677     win32|win64)
4678         disable symver
4679         if enabled shared; then
4680             # Link to the import library instead of the normal static library
4681             # for shared libs.
4682             LD_LIB='%.lib'
4683             # Cannot build both shared and static libs with MSVC or icl.
4684             disable static
4685         fi
4686         enabled x86_32 && check_ldflags -LARGEADDRESSAWARE
4687         shlibdir_default="$bindir_default"
4688         SLIBPREF=""
4689         SLIBSUF=".dll"
4690         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
4691         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
4692         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
4693         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4694         SLIB_INSTALL_LINKS=
4695         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
4696         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
4697         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
4698         objformat="win32"
4699         ranlib=:
4700         enable dos_paths
4701         ;;
4702     cygwin*)
4703         target_os=cygwin
4704         shlibdir_default="$bindir_default"
4705         SLIBPREF="cyg"
4706         SLIBSUF=".dll"
4707         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
4708         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
4709         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4710         SLIB_INSTALL_LINKS=
4711         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
4712         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
4713         objformat="win32"
4714         enable dos_paths
4715         enabled shared && ! enabled small && check_cmd $windres --version && enable gnu_windres
4716         ;;
4717     *-dos|freedos|opendos)
4718         network_extralibs="-lsocket"
4719         objformat="coff"
4720         enable dos_paths
4721         add_cppflags -U__STRICT_ANSI__
4722         ;;
4723     linux)
4724         enable dv1394
4725         enable section_data_rel_ro
4726         ;;
4727     irix*)
4728         target_os=irix
4729         ranlib="echo ignoring ranlib"
4730         ;;
4731     os/2*)
4732         strip="lxlite -CS"
4733         objformat="aout"
4734         add_cppflags -D_GNU_SOURCE
4735         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
4736         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
4737         LIBSUF="_s.a"
4738         SLIBPREF=""
4739         SLIBSUF=".dll"
4740         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
4741         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(FULLNAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
4742         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(FULLNAME).def; \
4743             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(FULLNAME).def; \
4744             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(FULLNAME).def; \
4745             echo EXPORTS >> $(SUBDIR)$(FULLNAME).def; \
4746             emxexp $(OBJS) >> $(SUBDIR)$(FULLNAME).def'
4747         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(FULLNAME)_dll.a $(SUBDIR)$(FULLNAME).def; \
4748             emximp -o $(SUBDIR)$(LIBPREF)$(FULLNAME)_dll.lib $(SUBDIR)$(FULLNAME).def;'
4749         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4750         SLIB_INSTALL_LINKS=
4751         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(FULLNAME)_dll.a $(LIBPREF)$(FULLNAME)_dll.lib'
4752         enable dos_paths
4753         enable_weak os2threads
4754         ;;
4755     gnu/kfreebsd)
4756         add_cppflags -D_BSD_SOURCE
4757         ;;
4758     gnu)
4759         ;;
4760     qnx)
4761         add_cppflags -D_QNX_SOURCE
4762         network_extralibs="-lsocket"
4763         ;;
4764     symbian)
4765         SLIBSUF=".dll"
4766         enable dos_paths
4767         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
4768         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
4769         add_ldflags -Wl,--target1-abs,--no-undefined \
4770                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
4771                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
4772         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
4773                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
4774                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
4775         ;;
4776     osf1)
4777         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
4778         ;;
4779     minix)
4780         ;;
4781     plan9)
4782         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
4783                      -D_REENTRANT_SOURCE        \
4784                      -D_RESEARCH_SOURCE         \
4785                      -DFD_SETSIZE=96            \
4786                      -DHAVE_SOCK_OPTS
4787         add_compat strtod.o strtod=avpriv_strtod
4788         network_extralibs='-lbsd'
4789         exeobjs=compat/plan9/main.o
4790         disable ffserver
4791         cp_f='cp'
4792         ;;
4793     none)
4794         ;;
4795     *)
4796         die "Unknown OS '$target_os'."
4797         ;;
4798 esac
4799
4800 # test if creating links works
4801 link_dest=$(mktemp -u $TMPDIR/dest_XXXXXXXX)
4802 link_name=$(mktemp -u $TMPDIR/name_XXXXXXXX)
4803 mkdir "$link_dest"
4804 $ln_s "$link_dest" "$link_name"
4805 touch "$link_dest/test_file"
4806 if [ "$source_path" != "." ] && ([ ! -d src ] || [ -L src ]) && [ -e "$link_name/test_file" ]; then
4807     # create link to source path
4808     [ -e src ] && rm src
4809     $ln_s "$source_path" src
4810     source_link=src
4811 else
4812     # creating directory links doesn't work
4813     # fall back to using the full source path
4814     source_link="$source_path"
4815 fi
4816 # cleanup
4817 rm -r "$link_dest"
4818 rm -r "$link_name"
4819
4820 # determine libc flavour
4821
4822 probe_libc(){
4823     pfx=$1
4824     pfx_no_=${pfx%_}
4825     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
4826     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
4827         eval ${pfx}libc_type=uclibc
4828         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4829     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
4830         eval ${pfx}libc_type=glibc
4831         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4832     # MinGW headers can be installed on Cygwin, so check for newlib first.
4833     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
4834         eval ${pfx}libc_type=newlib
4835         add_${pfx}cppflags -U__STRICT_ANSI__
4836     # MinGW64 is backwards compatible with MinGW32, so check for it first.