Merge commit '9f57f134c19773d54269b6cb9ee455ff87c2e9e1'
[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
95 Licensing options:
96   --enable-gpl             allow use of GPL code, the resulting libs
97                            and binaries will be under GPL [no]
98   --enable-version3        upgrade (L)GPL to version 3 [no]
99   --enable-nonfree         allow use of nonfree code, the resulting libs
100                            and binaries will be unredistributable [no]
101
102 Configuration options:
103   --disable-static         do not build static libraries [no]
104   --enable-shared          build shared libraries [no]
105   --enable-small           optimize for size instead of speed
106   --disable-runtime-cpudetect disable detecting cpu capabilities at runtime (smaller binary)
107   --enable-gray            enable full grayscale support (slower color)
108   --disable-swscale-alpha  disable alpha channel support in swscale
109   --disable-all            disable building components, libraries and programs
110   --enable-incompatible-libav-abi enable incompatible Libav fork ABI [no]
111   --enable-raise-major     increase major version numbers in sonames [no]
112
113 Program options:
114   --disable-programs       do not build command line programs
115   --disable-ffmpeg         disable ffmpeg build
116   --disable-ffplay         disable ffplay build
117   --disable-ffprobe        disable ffprobe build
118   --disable-ffserver       disable ffserver build
119
120 Documentation options:
121   --disable-doc            do not build documentation
122   --disable-htmlpages      do not build HTML documentation pages
123   --disable-manpages       do not build man documentation pages
124   --disable-podpages       do not build POD documentation pages
125   --disable-txtpages       do not build text documentation pages
126
127 Component options:
128   --disable-avdevice       disable libavdevice build
129   --disable-avcodec        disable libavcodec build
130   --disable-avformat       disable libavformat build
131   --disable-swresample     disable libswresample build
132   --disable-swscale        disable libswscale build
133   --disable-postproc       disable libpostproc build
134   --disable-avfilter       disable libavfilter build
135   --enable-avresample      enable libavresample build [no]
136   --disable-pthreads       disable pthreads [autodetect]
137   --disable-w32threads     disable Win32 threads [autodetect]
138   --disable-os2threads     disable OS/2 threads [autodetect]
139   --disable-network        disable network support [no]
140   --disable-dct            disable DCT code
141   --disable-dwt            disable DWT code
142   --disable-error-resilience disable error resilience code
143   --disable-lsp            disable LSP code
144   --disable-lzo            disable LZO decoder code
145   --disable-mdct           disable MDCT code
146   --disable-rdft           disable RDFT code
147   --disable-fft            disable FFT code
148   --disable-faan           disable floating point AAN (I)DCT code
149   --disable-pixelutils     disable pixel utils in libavutil
150
151 Hardware accelerators:
152   --disable-d3d11va        disable D3D11VA code [autodetect]
153   --disable-dxva2          disable DXVA2 code [autodetect]
154   --disable-vaapi          disable VAAPI code [autodetect]
155   --disable-vda            disable VDA code [autodetect]
156   --disable-vdpau          disable VDPAU code [autodetect]
157   --enable-videotoolbox    enable VideoToolbox 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   --enable-avisynth        enable reading of AviSynth script files [no]
198   --disable-bzlib          disable bzlib [autodetect]
199   --enable-chromaprint     enable audio fingerprinting with chromaprint [no]
200   --enable-fontconfig      enable fontconfig, useful for drawtext filter [no]
201   --enable-frei0r          enable frei0r video filtering [no]
202   --enable-gcrypt          enable gcrypt, needed for rtmp(t)e support
203                            if openssl, librtmp or gmp is not used [no]
204   --enable-gmp             enable gmp, needed for rtmp(t)e support
205                            if openssl or librtmp is not used [no]
206   --enable-gnutls          enable gnutls, needed for https support
207                            if openssl is not used [no]
208   --disable-iconv          disable iconv [autodetect]
209   --enable-ladspa          enable LADSPA audio filtering [no]
210   --enable-libaacplus      enable AAC+ encoding via libaacplus [no]
211   --enable-libass          enable libass subtitles rendering,
212                            needed for subtitles and ass filter [no]
213   --enable-libbluray       enable BluRay reading using libbluray [no]
214   --enable-libbs2b         enable bs2b DSP library [no]
215   --enable-libcaca         enable textual display using libcaca [no]
216   --enable-libcelt         enable CELT decoding via libcelt [no]
217   --enable-libcdio         enable audio CD grabbing with libcdio [no]
218   --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394
219                            and libraw1394 [no]
220   --enable-libdcadec       enable DCA decoding via libdcadec [no]
221   --enable-libfaac         enable AAC encoding via libfaac [no]
222   --enable-libfdk-aac      enable AAC de/encoding via libfdk-aac [no]
223   --enable-libflite        enable flite (voice synthesis) support via libflite [no]
224   --enable-libfreetype     enable libfreetype, needed for drawtext filter [no]
225   --enable-libfribidi      enable libfribidi, improves drawtext filter [no]
226   --enable-libgme          enable Game Music Emu via libgme [no]
227   --enable-libgsm          enable GSM de/encoding via libgsm [no]
228   --enable-libiec61883     enable iec61883 via libiec61883 [no]
229   --enable-libilbc         enable iLBC de/encoding via libilbc [no]
230   --enable-libkvazaar      enable HEVC encoding via libkvazaar [no]
231   --enable-libmfx          enable HW acceleration through libmfx
232   --enable-libmodplug      enable ModPlug via libmodplug [no]
233   --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
234   --enable-libnut          enable NUT (de)muxing via libnut,
235                            native (de)muxer exists [no]
236   --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
237   --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
238   --enable-libopencv       enable video filtering via libopencv [no]
239   --enable-libopenh264     enable H.264 encoding via OpenH264 [no]
240   --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]
241   --enable-libopus         enable Opus de/encoding via libopus [no]
242   --enable-libpulse        enable Pulseaudio input via libpulse [no]
243   --enable-librubberband   enable rubberband needed for rubberband filter [no]
244   --enable-libquvi         enable quvi input via libquvi [no]
245   --enable-librtmp         enable RTMP[E] support via librtmp [no]
246   --enable-libschroedinger enable Dirac de/encoding via libschroedinger [no]
247   --enable-libshine        enable fixed-point MP3 encoding via libshine [no]
248   --enable-libsmbclient    enable Samba protocol via libsmbclient [no]
249   --enable-libsnappy       enable Snappy compression, needed for hap encoding [no]
250   --enable-libsoxr         enable Include libsoxr resampling [no]
251   --enable-libspeex        enable Speex de/encoding via libspeex [no]
252   --enable-libssh          enable SFTP protocol via libssh [no]
253   --enable-libstagefright-h264  enable H.264 decoding via libstagefright [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-aacenc    enable AAC encoding via libvo-aacenc [no]
261   --enable-libvo-amrwbenc  enable AMR-WB encoding via libvo-amrwbenc [no]
262   --enable-libvorbis       enable Vorbis en/decoding via libvorbis,
263                            native implementation exists [no]
264   --enable-libvpx          enable VP8 and VP9 de/encoding via libvpx [no]
265   --enable-libwavpack      enable wavpack encoding via libwavpack [no]
266   --enable-libwebp         enable WebP encoding via libwebp [no]
267   --enable-libx264         enable H.264 encoding via x264 [no]
268   --enable-libx265         enable HEVC encoding via x265 [no]
269   --enable-libxavs         enable AVS encoding via xavs [no]
270   --enable-libxcb          enable X11 grabbing using XCB [autodetect]
271   --enable-libxcb-shm      enable X11 grabbing shm communication [autodetect]
272   --enable-libxcb-xfixes   enable X11 grabbing mouse rendering [autodetect]
273   --enable-libxcb-shape    enable X11 grabbing shape rendering [autodetect]
274   --enable-libxvid         enable Xvid encoding via xvidcore,
275                            native MPEG-4/Xvid encoder exists [no]
276   --enable-libzimg         enable z.lib, needed for zscale filter [no]
277   --enable-libzmq          enable message passing via libzmq [no]
278   --enable-libzvbi         enable teletext support via libzvbi [no]
279   --disable-lzma           disable lzma [autodetect]
280   --enable-decklink        enable Blackmagic DeckLink I/O support [no]
281   --enable-mmal            enable decoding via MMAL [no]
282   --enable-nvenc           enable NVIDIA NVENC support [no]
283   --enable-openal          enable OpenAL 1.1 capture support [no]
284   --enable-opencl          enable OpenCL code
285   --enable-opengl          enable OpenGL rendering [no]
286   --enable-openssl         enable openssl, needed for https support
287                            if gnutls is not used [no]
288   --disable-schannel       disable SChannel SSP, needed for TLS support on
289                            Windows if openssl and gnutls are not used [autodetect]
290   --disable-sdl            disable sdl [autodetect]
291   --disable-securetransport disable Secure Transport, needed for TLS support
292                            on OSX if openssl and gnutls are not used [autodetect]
293   --enable-x11grab         enable X11 grabbing (legacy) [no]
294   --disable-xlib           disable xlib [autodetect]
295   --disable-zlib           disable zlib [autodetect]
296
297 Toolchain options:
298   --arch=ARCH              select architecture [$arch]
299   --cpu=CPU                select the minimum required CPU (affects
300                            instruction selection, may crash on older CPUs)
301   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
302   --progs-suffix=SUFFIX    program name suffix []
303   --enable-cross-compile   assume a cross-compiler is used
304   --sysroot=PATH           root of cross-build tree
305   --sysinclude=PATH        location of cross-build system headers
306   --target-os=OS           compiler targets OS [$target_os]
307   --target-exec=CMD        command to run executables on target
308   --target-path=DIR        path to view of build directory on target
309   --target-samples=DIR     path to samples directory on target
310   --tempprefix=PATH        force fixed dir/prefix instead of mktemp for checks
311   --toolchain=NAME         set tool defaults according to NAME
312   --nm=NM                  use nm tool NM [$nm_default]
313   --ar=AR                  use archive tool AR [$ar_default]
314   --as=AS                  use assembler AS [$as_default]
315   --windres=WINDRES        use windows resource compiler WINDRES [$windres_default]
316   --yasmexe=EXE            use yasm-compatible assembler EXE [$yasmexe_default]
317   --cc=CC                  use C compiler CC [$cc_default]
318   --cxx=CXX                use C compiler CXX [$cxx_default]
319   --objcc=OCC              use ObjC compiler OCC [$cc_default]
320   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
321   --ld=LD                  use linker LD [$ld_default]
322   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
323   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
324   --ranlib=RANLIB          use ranlib RANLIB [$ranlib_default]
325   --doxygen=DOXYGEN        use DOXYGEN to generate API doc [$doxygen_default]
326   --host-cc=HOSTCC         use host C compiler HOSTCC
327   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
328   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
329   --host-ld=HOSTLD         use host linker HOSTLD
330   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
331   --host-libs=HLIBS        use libs HLIBS when linking for host
332   --host-os=OS             compiler host OS [$target_os]
333   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
334   --extra-cxxflags=ECFLAGS add ECFLAGS to CXXFLAGS [$CXXFLAGS]
335   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
336   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
337   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
338   --extra-ldlibflags=ELDFLAGS add ELDFLAGS to LDLIBFLAGS [$LDLIBFLAGS]
339   --extra-libs=ELIBS       add ELIBS [$ELIBS]
340   --extra-version=STRING   version string suffix []
341   --optflags=OPTFLAGS      override optimization-related compiler flags
342   --build-suffix=SUFFIX    library name suffix []
343   --enable-pic             build position-independent code
344   --enable-thumb           compile for Thumb instruction set
345   --enable-lto             use link-time optimization
346   --env="ENV=override"     override the environment variables
347
348 Advanced options (experts only):
349   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
350   --custom-allocator=NAME  use a supported custom allocator
351   --disable-symver         disable symbol versioning
352   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
353   --disable-safe-bitstream-reader
354                            disable buffer boundary checking in bitreaders
355                            (faster, but may crash)
356   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
357   --sws-max-filter-size=N  the max filter size swscale uses [$sws_max_filter_size_default]
358
359 Optimization options (experts only):
360   --disable-asm            disable all assembly optimizations
361   --disable-altivec        disable AltiVec optimizations
362   --disable-vsx            disable VSX optimizations
363   --disable-power8         disable POWER8 optimizations
364   --disable-amd3dnow       disable 3DNow! optimizations
365   --disable-amd3dnowext    disable 3DNow! extended optimizations
366   --disable-mmx            disable MMX optimizations
367   --disable-mmxext         disable MMXEXT optimizations
368   --disable-sse            disable SSE optimizations
369   --disable-sse2           disable SSE2 optimizations
370   --disable-sse3           disable SSE3 optimizations
371   --disable-ssse3          disable SSSE3 optimizations
372   --disable-sse4           disable SSE4 optimizations
373   --disable-sse42          disable SSE4.2 optimizations
374   --disable-avx            disable AVX optimizations
375   --disable-xop            disable XOP optimizations
376   --disable-fma3           disable FMA3 optimizations
377   --disable-fma4           disable FMA4 optimizations
378   --disable-avx2           disable AVX2 optimizations
379   --disable-aesni          disable AESNI optimizations
380   --disable-armv5te        disable armv5te optimizations
381   --disable-armv6          disable armv6 optimizations
382   --disable-armv6t2        disable armv6t2 optimizations
383   --disable-vfp            disable VFP optimizations
384   --disable-neon           disable NEON optimizations
385   --disable-inline-asm     disable use of inline assembly
386   --disable-yasm           disable use of nasm/yasm assembly
387   --disable-mips64r6       disable MIPS64R6 optimizations
388   --disable-mipsdsp        disable MIPS DSP ASE R1 optimizations
389   --disable-mipsdspr2      disable MIPS DSP ASE R2 optimizations
390   --disable-msa            disable MSA optimizations
391   --disable-mipsfpu        disable floating point MIPS optimizations
392   --disable-mmi            disable Loongson SIMD optimizations
393   --disable-fast-unaligned consider unaligned accesses slow
394
395 Developer options (useful when working on FFmpeg itself):
396   --disable-debug          disable debugging symbols
397   --enable-debug=LEVEL     set the debug level [$debuglevel]
398   --disable-optimizations  disable compiler optimizations
399   --enable-extra-warnings  enable more compiler warnings
400   --disable-stripping      disable stripping of executables and shared libraries
401   --assert-level=level     0(default), 1 or 2, amount of assertion testing,
402                            2 causes a slowdown at runtime.
403   --enable-memory-poisoning fill heap uninitialized allocated space with arbitrary data
404   --valgrind=VALGRIND      run "make fate" tests through valgrind to detect memory
405                            leaks and errors, using the specified valgrind binary.
406                            Cannot be combined with --target-exec
407   --enable-ftrapv          Trap arithmetic overflows
408   --samples=PATH           location of test samples for FATE, if not set use
409                            \$FATE_SAMPLES at make invocation time.
410   --enable-neon-clobber-test check NEON registers for clobbering (should be
411                            used only for debugging purposes)
412   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
413                            should be used only for debugging purposes)
414   --enable-random          randomly enable/disable components
415   --disable-random
416   --enable-random=LIST     randomly enable/disable specific components or
417   --disable-random=LIST    component groups. LIST is a comma-separated list
418                            of NAME[:PROB] entries where NAME is a component
419                            (group) and PROB the probability associated with
420                            NAME (default 0.5).
421   --random-seed=VALUE      seed value for --enable/disable-random
422   --disable-valgrind-backtrace do not print a backtrace under Valgrind
423                            (only applies to --disable-optimizations builds)
424
425 NOTE: Object files are built at the place where configure is launched.
426 EOF
427   exit 0
428 }
429
430 quotes='""'
431 if test -t 1 && which tput >/dev/null 2>&1; then
432     ncolors=$(tput colors)
433     if test -n "$ncolors" && test $ncolors -ge 8; then
434         bold_color=$(tput bold)
435         warn_color=$(tput setaf 3)
436         error_color=$(tput setaf 1)
437         reset_color=$(tput sgr0)
438     fi
439     # 72 used instead of 80 since that's the default of pr
440     ncols=$(tput cols)
441 fi
442 : ${ncols:=72}
443
444 log(){
445     echo "$@" >> $logfile
446 }
447
448 log_file(){
449     log BEGIN $1
450     pr -n -t $1 >> $logfile
451     log END $1
452 }
453
454 warn(){
455     log "WARNING: $*"
456     WARNINGS="${WARNINGS}WARNING: $*\n"
457 }
458
459 die(){
460     log "$@"
461     echo "$error_color$bold_color$@$reset_color"
462     cat <<EOF
463
464 If you think configure made a mistake, make sure you are using the latest
465 version from Git.  If the latest version fails, report the problem to the
466 ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
467 EOF
468     if disabled logging; then
469         cat <<EOF
470 Rerun configure with logging enabled (do not use --disable-logging), and
471 include the log this produces with your report.
472 EOF
473     else
474         cat <<EOF
475 Include the log file "$logfile" produced by configure as this will help
476 solve the problem.
477 EOF
478     fi
479     exit 1
480 }
481
482 # Avoid locale weirdness, besides we really just want to translate ASCII.
483 toupper(){
484     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
485 }
486
487 tolower(){
488     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
489 }
490
491 c_escape(){
492     echo "$*" | sed 's/["\\]/\\\0/g'
493 }
494
495 sh_quote(){
496     v=$(echo "$1" | sed "s/'/'\\\\''/g")
497     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
498     echo "$v"
499 }
500
501 cleanws(){
502     echo "$@" | sed 's/^ *//;s/[[:space:]][[:space:]]*/ /g;s/ *$//'
503 }
504
505 filter(){
506     pat=$1
507     shift
508     for v; do
509         eval "case $v in $pat) echo $v ;; esac"
510     done
511 }
512
513 filter_out(){
514     pat=$1
515     shift
516     for v; do
517         eval "case $v in $pat) ;; *) echo $v ;; esac"
518     done
519 }
520
521 map(){
522     m=$1
523     shift
524     for v; do eval $m; done
525 }
526
527 add_suffix(){
528     suffix=$1
529     shift
530     for v; do echo ${v}${suffix}; done
531 }
532
533 set_all(){
534     value=$1
535     shift
536     for var in $*; do
537         eval $var=$value
538     done
539 }
540
541 set_weak(){
542     value=$1
543     shift
544     for var; do
545         eval : \${$var:=$value}
546     done
547 }
548
549 sanitize_var_name(){
550     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
551 }
552
553 set_safe(){
554     var=$1
555     shift
556     eval $(sanitize_var_name "$var")='$*'
557 }
558
559 get_safe(){
560     eval echo \$$(sanitize_var_name "$1")
561 }
562
563 pushvar(){
564     for pvar in $*; do
565         eval level=\${${pvar}_level:=0}
566         eval ${pvar}_${level}="\$$pvar"
567         eval ${pvar}_level=$(($level+1))
568     done
569 }
570
571 popvar(){
572     for pvar in $*; do
573         eval level=\${${pvar}_level:-0}
574         test $level = 0 && continue
575         eval level=$(($level-1))
576         eval $pvar="\${${pvar}_${level}}"
577         eval ${pvar}_level=$level
578         eval unset ${pvar}_${level}
579     done
580 }
581
582 enable(){
583     set_all yes $*
584 }
585
586 disable(){
587     set_all no $*
588 }
589
590 enable_weak(){
591     set_weak yes $*
592 }
593
594 disable_weak(){
595     set_weak no $*
596 }
597
598 enable_safe(){
599     for var; do
600         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
601     done
602 }
603
604 disable_safe(){
605     for var; do
606         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
607     done
608 }
609
610 do_enable_deep(){
611     for var; do
612         enabled $var && continue
613         eval sel="\$${var}_select"
614         eval sgs="\$${var}_suggest"
615         pushvar var sgs
616         enable_deep $sel
617         popvar sgs
618         enable_deep_weak $sgs
619         popvar var
620     done
621 }
622
623 enable_deep(){
624     do_enable_deep $*
625     enable $*
626 }
627
628 enable_deep_weak(){
629     for var; do
630         disabled $var && continue
631         pushvar var
632         do_enable_deep $var
633         popvar var
634         enable_weak $var
635     done
636 }
637
638 enabled(){
639     test "${1#!}" = "$1" && op='=' || op=!=
640     eval test "x\$${1#!}" $op "xyes"
641 }
642
643 disabled(){
644     test "${1#!}" = "$1" && op='=' || op=!=
645     eval test "x\$${1#!}" $op "xno"
646 }
647
648 enabled_all(){
649     for opt; do
650         enabled $opt || return 1
651     done
652 }
653
654 disabled_all(){
655     for opt; do
656         disabled $opt || return 1
657     done
658 }
659
660 enabled_any(){
661     for opt; do
662         enabled $opt && return 0
663     done
664 }
665
666 disabled_any(){
667     for opt; do
668         disabled $opt && return 0
669     done
670     return 1
671 }
672
673 set_default(){
674     for opt; do
675         eval : \${$opt:=\$${opt}_default}
676     done
677 }
678
679 is_in(){
680     value=$1
681     shift
682     for var in $*; do
683         [ $var = $value ] && return 0
684     done
685     return 1
686 }
687
688 do_check_deps(){
689     for cfg; do
690         cfg="${cfg#!}"
691         enabled ${cfg}_checking && die "Circular dependency for $cfg."
692         disabled ${cfg}_checking && continue
693         enable ${cfg}_checking
694         append allopts $cfg
695
696         eval dep_all="\$${cfg}_deps"
697         eval dep_any="\$${cfg}_deps_any"
698         eval dep_sel="\$${cfg}_select"
699         eval dep_sgs="\$${cfg}_suggest"
700         eval dep_ifa="\$${cfg}_if"
701         eval dep_ifn="\$${cfg}_if_any"
702
703         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
704         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
705         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
706
707         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
708         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
709         enabled_all  $dep_all || disable $cfg
710         enabled_any  $dep_any || disable $cfg
711         disabled_any $dep_sel && disable $cfg
712
713         if enabled $cfg; then
714             enable_deep $dep_sel
715             enable_deep_weak $dep_sgs
716         fi
717
718         disable ${cfg}_checking
719     done
720 }
721
722 check_deps(){
723     unset allopts
724
725     do_check_deps "$@"
726
727     for cfg in $allopts; do
728         enabled $cfg || continue
729         eval dep_extralibs="\$${cfg}_extralibs"
730         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
731     done
732 }
733
734 print_config(){
735     pfx=$1
736     files=$2
737     shift 2
738     map 'eval echo "$v \${$v:-no}"' "$@" |
739     awk "BEGIN { split(\"$files\", files) }
740         {
741             c = \"$pfx\" toupper(\$1);
742             v = \$2;
743             sub(/yes/, 1, v);
744             sub(/no/,  0, v);
745             for (f in files) {
746                 file = files[f];
747                 if (file ~ /\\.h\$/) {
748                     printf(\"#define %s %d\\n\", c, v) >>file;
749                 } else if (file ~ /\\.asm\$/) {
750                     printf(\"%%define %s %d\\n\", c, v) >>file;
751                 } else if (file ~ /\\.mak\$/) {
752                     n = -v ? \"\" : \"!\";
753                     printf(\"%s%s=yes\\n\", n, c) >>file;
754                 } else if (file ~ /\\.texi\$/) {
755                     pre = -v ? \"\" : \"@c \";
756                     yesno = \$2;
757                     c2 = tolower(c);
758                     gsub(/_/, \"-\", c2);
759                     printf(\"%s@set %s %s\\n\", pre, c2, yesno) >>file;
760                 }
761             }
762         }"
763 }
764
765 print_enabled(){
766     suf=$1
767     shift
768     for v; do
769         enabled $v && printf "%s\n" ${v%$suf};
770     done
771 }
772
773 append(){
774     var=$1
775     shift
776     eval "$var=\"\$$var $*\""
777 }
778
779 prepend(){
780     var=$1
781     shift
782     eval "$var=\"$* \$$var\""
783 }
784
785 unique(){
786     var=$1
787     uniq_list=""
788     for tok in $(eval echo \$$var); do
789         uniq_list="$(filter_out $tok $uniq_list) $tok"
790     done
791     eval "$var=\"${uniq_list}\""
792 }
793
794 add_cppflags(){
795     append CPPFLAGS "$@"
796 }
797
798 add_cflags(){
799     append CFLAGS $($cflags_filter "$@")
800 }
801
802 add_cxxflags(){
803     append CXXFLAGS $($cflags_filter "$@")
804 }
805
806 add_asflags(){
807     append ASFLAGS $($asflags_filter "$@")
808 }
809
810 add_objcflags(){
811     append OBJCFLAGS $($objcflags_filter "$@")
812 }
813
814 add_ldflags(){
815     append LDFLAGS $($ldflags_filter "$@")
816 }
817
818 add_ldexeflags(){
819     append LDEXEFLAGS $($ldflags_filter "$@")
820 }
821
822 add_ldlibflags(){
823     append LDLIBFLAGS $($ldflags_filter "$@")
824 }
825
826 add_stripflags(){
827     append ASMSTRIPFLAGS "$@"
828 }
829
830 add_extralibs(){
831     prepend extralibs $($ldflags_filter "$@")
832 }
833
834 add_host_cppflags(){
835     append host_cppflags "$@"
836 }
837
838 add_host_cflags(){
839     append host_cflags $($host_cflags_filter "$@")
840 }
841
842 add_host_ldflags(){
843     append host_ldflags $($host_ldflags_filter "$@")
844 }
845
846 add_compat(){
847     append compat_objs $1
848     shift
849     map 'add_cppflags -D$v' "$@"
850 }
851
852 check_cmd(){
853     log "$@"
854     "$@" >> $logfile 2>&1
855 }
856
857 check_stat(){
858     log check_stat "$@"
859     stat "$1" >> $logfile 2>&1
860 }
861
862 cc_o(){
863     eval printf '%s\\n' $CC_O
864 }
865
866 cc_e(){
867     eval printf '%s\\n' $CC_E
868 }
869
870 check_cc(){
871     log check_cc "$@"
872     cat > $TMPC
873     log_file $TMPC
874     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
875 }
876
877 check_cxx(){
878     log check_cxx "$@"
879     cat > $TMPCPP
880     log_file $TMPCPP
881     check_cmd $cxx $CPPFLAGS $CFLAGS $CXXFLAGS "$@" $CXX_C -o $TMPO $TMPCPP
882 }
883
884 check_objcc(){
885     log check_objcc "$@"
886     cat > $TMPM
887     log_file $TMPM
888     check_cmd $objcc -Werror=missing-prototypes $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPM
889 }
890
891 check_cpp(){
892     log check_cpp "$@"
893     cat > $TMPC
894     log_file $TMPC
895     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
896 }
897
898 as_o(){
899     eval printf '%s\\n' $AS_O
900 }
901
902 check_as(){
903     log check_as "$@"
904     cat > $TMPS
905     log_file $TMPS
906     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
907 }
908
909 check_inline_asm(){
910     log check_inline_asm "$@"
911     name="$1"
912     code="$2"
913     shift 2
914     disable $name
915     check_cc "$@" <<EOF && enable $name
916 void foo(void){ __asm__ volatile($code); }
917 EOF
918 }
919
920 check_insn(){
921     log check_insn "$@"
922     check_inline_asm ${1}_inline "\"$2\""
923     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
924 }
925
926 check_yasm(){
927     log check_yasm "$@"
928     echo "$1" > $TMPS
929     log_file $TMPS
930     shift 1
931     check_cmd $yasmexe $YASMFLAGS -Werror "$@" -o $TMPO $TMPS
932 }
933
934 ld_o(){
935     eval printf '%s\\n' $LD_O
936 }
937
938 check_ld(){
939     log check_ld "$@"
940     type=$1
941     shift 1
942     flags=$(filter_out '-l*|*.so' $@)
943     libs=$(filter '-l*|*.so' $@)
944     check_$type $($cflags_filter $flags) || return
945     flags=$($ldflags_filter $flags)
946     libs=$($ldflags_filter $libs)
947     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
948 }
949
950 print_include(){
951     hdr=$1
952     test "${hdr%.h}" = "${hdr}" &&
953         echo "#include $hdr"    ||
954         echo "#include <$hdr>"
955 }
956
957 check_code(){
958     log check_code "$@"
959     check=$1
960     headers=$2
961     code=$3
962     shift 3
963     {
964         for hdr in $headers; do
965             print_include $hdr
966         done
967         echo "int main(void) { $code; return 0; }"
968     } | check_$check "$@"
969 }
970
971 check_cppflags(){
972     log check_cppflags "$@"
973     check_cc "$@" <<EOF && append CPPFLAGS "$@"
974 int x;
975 EOF
976 }
977
978 test_cflags(){
979     log test_cflags "$@"
980     set -- $($cflags_filter "$@")
981     check_cc "$@" <<EOF
982 int x;
983 EOF
984 }
985
986 check_cflags(){
987     log check_cflags "$@"
988     test_cflags "$@" && add_cflags "$@"
989 }
990
991 check_cxxflags(){
992     log check_cxxflags "$@"
993     set -- $($cflags_filter "$@")
994     check_cxx "$@" <<EOF && append CXXFLAGS "$@"
995 int x;
996 EOF
997 }
998
999 test_objcflags(){
1000     log test_cflags "$@"
1001     set -- $($cflags_filter "$@")
1002     check_objcc "$@" <<EOF
1003 int x;
1004 EOF
1005 }
1006
1007 check_objcflags(){
1008     log check_cflags "$@"
1009     test_objcflags "$@" && add_objcflags "$@"
1010 }
1011
1012 test_ldflags(){
1013     log test_ldflags "$@"
1014     check_ld "cc" "$@" <<EOF
1015 int main(void){ return 0; }
1016 EOF
1017 }
1018
1019 check_ldflags(){
1020     log check_ldflags "$@"
1021     test_ldflags "$@" && add_ldflags "$@"
1022 }
1023
1024 test_stripflags(){
1025     log test_stripflags "$@"
1026     # call check_cc to get a fresh TMPO
1027     check_cc <<EOF
1028 int main(void) { return 0; }
1029 EOF
1030     check_cmd $strip $ASMSTRIPFLAGS "$@" $TMPO
1031 }
1032
1033 check_stripflags(){
1034     log check_stripflags "$@"
1035     test_stripflags "$@" && add_stripflags "$@"
1036 }
1037
1038 check_header(){
1039     log check_header "$@"
1040     header=$1
1041     shift
1042     disable_safe $header
1043     check_cpp "$@" <<EOF && enable_safe $header
1044 #include <$header>
1045 int x;
1046 EOF
1047 }
1048
1049 check_header_objcc(){
1050     log check_header_objcc "$@"
1051     rm -f -- "$TMPO"
1052     header=$1
1053     shift
1054     disable_safe $header
1055     {
1056        echo "#include <$header>"
1057        echo "int main(void) { return 0; }"
1058     } | check_objcc && check_stat "$TMPO" && enable_safe $headers
1059 }
1060
1061 check_func(){
1062     log check_func "$@"
1063     func=$1
1064     shift
1065     disable $func
1066     check_ld "cc" "$@" <<EOF && enable $func
1067 extern int $func();
1068 int main(void){ $func(); }
1069 EOF
1070 }
1071
1072 check_complexfunc(){
1073     log check_complexfunc "$@"
1074     func=$1
1075     narg=$2
1076     shift 2
1077     test $narg = 2 && args="f, g" || args="f * I"
1078     disable $func
1079     check_ld "cc" "$@" <<EOF && enable $func
1080 #include <complex.h>
1081 #include <math.h>
1082 float foo(complex float f, complex float g) { return $func($args); }
1083 int main(void){ return (int) foo; }
1084 EOF
1085 }
1086
1087 check_mathfunc(){
1088     log check_mathfunc "$@"
1089     func=$1
1090     narg=$2
1091     shift 2
1092     test $narg = 2 && args="f, g" || args="f"
1093     disable $func
1094     check_ld "cc" "$@" <<EOF && enable $func
1095 #include <math.h>
1096 float foo(float f, float g) { return $func($args); }
1097 int main(void){ return (int) foo; }
1098 EOF
1099 }
1100
1101 check_func_headers(){
1102     log check_func_headers "$@"
1103     headers=$1
1104     funcs=$2
1105     shift 2
1106     {
1107         for hdr in $headers; do
1108             print_include $hdr
1109         done
1110         for func in $funcs; do
1111             echo "long check_$func(void) { return (long) $func; }"
1112         done
1113         echo "int main(void) { return 0; }"
1114     } | check_ld "cc" "$@" && enable $funcs && enable_safe $headers
1115 }
1116
1117 check_class_headers_cpp(){
1118     log check_class_headers_cpp "$@"
1119     headers=$1
1120     classes=$2
1121     shift 2
1122     {
1123         for hdr in $headers; do
1124             echo "#include <$hdr>"
1125         done
1126         echo "int main(void) { "
1127         i=1
1128         for class in $classes; do
1129             echo "$class obj$i;"
1130             i=$(expr $i + 1)
1131         done
1132         echo "return 0; }"
1133     } | check_ld "cxx" "$@" && enable $funcs && enable_safe $headers
1134 }
1135
1136 check_cpp_condition(){
1137     log check_cpp_condition "$@"
1138     header=$1
1139     condition=$2
1140     shift 2
1141     check_cpp "$@" <<EOF
1142 #include <$header>
1143 #if !($condition)
1144 #error "unsatisfied condition: $condition"
1145 #endif
1146 EOF
1147 }
1148
1149 check_lib(){
1150     log check_lib "$@"
1151     header="$1"
1152     func="$2"
1153     shift 2
1154     check_header $header && check_func $func "$@" && add_extralibs "$@"
1155 }
1156
1157 check_lib2(){
1158     log check_lib2 "$@"
1159     headers="$1"
1160     funcs="$2"
1161     shift 2
1162     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
1163 }
1164
1165 check_lib_cpp(){
1166     log check_lib_cpp "$@"
1167     headers="$1"
1168     classes="$2"
1169     shift 2
1170     check_class_headers_cpp "$headers" "$classes" "$@" && add_extralibs "$@"
1171 }
1172
1173 check_pkg_config(){
1174     log check_pkg_config "$@"
1175     pkgandversion="$1"
1176     pkg="${1%% *}"
1177     headers="$2"
1178     funcs="$3"
1179     shift 3
1180     check_cmd $pkg_config --exists --print-errors $pkgandversion || return
1181     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1182     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1183     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1184         set_safe "${pkg}_cflags" $pkg_cflags   &&
1185         set_safe "${pkg}_libs"   $pkg_libs
1186 }
1187
1188 check_exec(){
1189     check_ld "cc" "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1190 }
1191
1192 check_exec_crash(){
1193     code=$(cat)
1194
1195     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1196     # are safe but may not be available everywhere.  Thus we use
1197     # raise(SIGTERM) instead.  The check is run in a subshell so we
1198     # can redirect the "Terminated" message from the shell.  SIGBUS
1199     # is not defined by standard C so it is used conditionally.
1200
1201     (check_exec "$@") >> $logfile 2>&1 <<EOF
1202 #include <signal.h>
1203 static void sighandler(int sig){
1204     raise(SIGTERM);
1205 }
1206 int foo(void){
1207     $code
1208 }
1209 int (*func_ptr)(void) = foo;
1210 int main(void){
1211     signal(SIGILL, sighandler);
1212     signal(SIGFPE, sighandler);
1213     signal(SIGSEGV, sighandler);
1214 #ifdef SIGBUS
1215     signal(SIGBUS, sighandler);
1216 #endif
1217     return func_ptr();
1218 }
1219 EOF
1220 }
1221
1222 check_type(){
1223     log check_type "$@"
1224     headers=$1
1225     type=$2
1226     shift 2
1227     disable_safe "$type"
1228     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1229 }
1230
1231 check_struct(){
1232     log check_struct "$@"
1233     headers=$1
1234     struct=$2
1235     member=$3
1236     shift 3
1237     disable_safe "${struct}_${member}"
1238     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1239         enable_safe "${struct}_${member}"
1240 }
1241
1242 check_builtin(){
1243     log check_builtin "$@"
1244     name=$1
1245     headers=$2
1246     builtin=$3
1247     shift 3
1248     disable "$name"
1249     check_code ld "$headers" "$builtin" "cc" "$@" && enable "$name"
1250 }
1251
1252 check_compile_assert(){
1253     log check_compile_assert "$@"
1254     name=$1
1255     headers=$2
1256     condition=$3
1257     shift 3
1258     disable "$name"
1259     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1260 }
1261
1262 require(){
1263     name="$1"
1264     header="$2"
1265     func="$3"
1266     shift 3
1267     check_lib $header $func "$@" || die "ERROR: $name not found"
1268 }
1269
1270 require2(){
1271     name="$1"
1272     headers="$2"
1273     func="$3"
1274     shift 3
1275     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1276 }
1277
1278 require_cpp(){
1279     name="$1"
1280     headers="$2"
1281     classes="$3"
1282     shift 3
1283     check_lib_cpp "$headers" "$classes" "$@" || die "ERROR: $name not found"
1284 }
1285
1286 use_pkg_config(){
1287     pkg="$1"
1288     check_pkg_config "$@" || return 1
1289     add_cflags    $(get_safe "${pkg}_cflags")
1290     add_extralibs $(get_safe "${pkg}_libs")
1291 }
1292
1293 require_pkg_config(){
1294     use_pkg_config "$@" || die "ERROR: $pkg not found using pkg-config$pkg_config_fail_message"
1295 }
1296
1297 require_libfreetype(){
1298     log require_libfreetype "$@"
1299     pkg="freetype2"
1300     check_cmd $pkg_config --exists --print-errors $pkg \
1301       || die "ERROR: $pkg not found"
1302     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1303     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1304     {
1305         echo "#include <ft2build.h>"
1306         echo "#include FT_FREETYPE_H"
1307         echo "long check_func(void) { return (long) FT_Init_FreeType; }"
1308         echo "int main(void) { return 0; }"
1309     } | check_ld "cc" $pkg_cflags $pkg_libs \
1310       && set_safe "${pkg}_cflags" $pkg_cflags \
1311       && set_safe "${pkg}_libs"   $pkg_libs \
1312       || die "ERROR: $pkg not found"
1313     add_cflags    $(get_safe "${pkg}_cflags")
1314     add_extralibs $(get_safe "${pkg}_libs")
1315 }
1316
1317 hostcc_e(){
1318     eval printf '%s\\n' $HOSTCC_E
1319 }
1320
1321 hostcc_o(){
1322     eval printf '%s\\n' $HOSTCC_O
1323 }
1324
1325 check_host_cc(){
1326     log check_host_cc "$@"
1327     cat > $TMPC
1328     log_file $TMPC
1329     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1330 }
1331
1332 check_host_cpp(){
1333     log check_host_cpp "$@"
1334     cat > $TMPC
1335     log_file $TMPC
1336     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1337 }
1338
1339 check_host_cppflags(){
1340     log check_host_cppflags "$@"
1341     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1342 int x;
1343 EOF
1344 }
1345
1346 check_host_cflags(){
1347     log check_host_cflags "$@"
1348     set -- $($host_cflags_filter "$@")
1349     check_host_cc "$@" <<EOF && append host_cflags "$@"
1350 int x;
1351 EOF
1352 }
1353
1354 check_host_cpp_condition(){
1355     log check_host_cpp_condition "$@"
1356     header=$1
1357     condition=$2
1358     shift 2
1359     check_host_cpp "$@" <<EOF
1360 #include <$header>
1361 #if !($condition)
1362 #error "unsatisfied condition: $condition"
1363 #endif
1364 EOF
1365 }
1366
1367 cp_if_changed(){
1368     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1369     mkdir -p "$(dirname $2)"
1370     $cp_f "$1" "$2"
1371 }
1372
1373 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1374 # system-dependent things.
1375
1376 AVCODEC_COMPONENTS="
1377     bsfs
1378     decoders
1379     encoders
1380     hwaccels
1381     parsers
1382 "
1383
1384 AVDEVICE_COMPONENTS="
1385     indevs
1386     outdevs
1387 "
1388 AVFILTER_COMPONENTS="
1389     filters
1390 "
1391 AVFORMAT_COMPONENTS="
1392     demuxers
1393     muxers
1394     protocols
1395 "
1396
1397 AVRESAMPLE_COMPONENTS=""
1398 AVUTIL_COMPONENTS=""
1399
1400 COMPONENT_LIST="
1401     $AVCODEC_COMPONENTS
1402     $AVDEVICE_COMPONENTS
1403     $AVFILTER_COMPONENTS
1404     $AVFORMAT_COMPONENTS
1405     $AVRESAMPLE_COMPONENTS
1406     $AVUTIL_COMPONENTS
1407 "
1408
1409 EXAMPLE_LIST="
1410     avio_reading_example
1411     avio_dir_cmd_example
1412     decoding_encoding_example
1413     demuxing_decoding_example
1414     extract_mvs_example
1415     filter_audio_example
1416     filtering_audio_example
1417     filtering_video_example
1418     metadata_example
1419     muxing_example
1420     qsvdec_example
1421     remuxing_example
1422     resampling_audio_example
1423     scaling_video_example
1424     transcode_aac_example
1425     transcoding_example
1426 "
1427
1428 EXTERNAL_LIBRARY_LIST="
1429     avisynth
1430     bzlib
1431     chromaprint
1432     crystalhd
1433     decklink
1434     frei0r
1435     gcrypt
1436     gmp
1437     gnutls
1438     iconv
1439     ladspa
1440     libaacplus
1441     libass
1442     libbluray
1443     libbs2b
1444     libcaca
1445     libcdio
1446     libcelt
1447     libdc1394
1448     libdcadec
1449     libfaac
1450     libfdk_aac
1451     libflite
1452     libfontconfig
1453     libfreetype
1454     libfribidi
1455     libgme
1456     libgsm
1457     libiec61883
1458     libilbc
1459     libkvazaar
1460     libmfx
1461     libmodplug
1462     libmp3lame
1463     libnut
1464     libopencore_amrnb
1465     libopencore_amrwb
1466     libopencv
1467     libopenh264
1468     libopenjpeg
1469     libopus
1470     libpulse
1471     libquvi
1472     librtmp
1473     librubberband
1474     libschroedinger
1475     libshine
1476     libsmbclient
1477     libsnappy
1478     libsoxr
1479     libspeex
1480     libssh
1481     libstagefright_h264
1482     libtesseract
1483     libtheora
1484     libtwolame
1485     libutvideo
1486     libv4l2
1487     libvidstab
1488     libvo_aacenc
1489     libvo_amrwbenc
1490     libvorbis
1491     libvpx
1492     libwavpack
1493     libwebp
1494     libx264
1495     libx265
1496     libxavs
1497     libxcb
1498     libxcb_shm
1499     libxcb_shape
1500     libxcb_xfixes
1501     libxvid
1502     libzimg
1503     libzmq
1504     libzvbi
1505     lzma
1506     mmal
1507     nvenc
1508     openal
1509     opencl
1510     opengl
1511     openssl
1512     schannel
1513     sdl
1514     securetransport
1515     x11grab
1516     xlib
1517     zlib
1518 "
1519
1520 DOCUMENT_LIST="
1521     doc
1522     htmlpages
1523     manpages
1524     podpages
1525     txtpages
1526 "
1527
1528 FEATURE_LIST="
1529     ftrapv
1530     gray
1531     hardcoded_tables
1532     runtime_cpudetect
1533     safe_bitstream_reader
1534     shared
1535     small
1536     static
1537     swscale_alpha
1538 "
1539
1540 HWACCEL_LIST="
1541     d3d11va
1542     dxva2
1543     vaapi
1544     vda
1545     vdpau
1546     videotoolbox
1547     xvmc
1548 "
1549
1550 LIBRARY_LIST="
1551     avcodec
1552     avdevice
1553     avfilter
1554     avformat
1555     avresample
1556     avutil
1557     postproc
1558     swresample
1559     swscale
1560 "
1561
1562 LICENSE_LIST="
1563     gpl
1564     nonfree
1565     version3
1566 "
1567
1568 PROGRAM_LIST="
1569     ffplay
1570     ffprobe
1571     ffserver
1572     ffmpeg
1573 "
1574
1575 SUBSYSTEM_LIST="
1576     dct
1577     dwt
1578     error_resilience
1579     faan
1580     fast_unaligned
1581     fft
1582     lsp
1583     lzo
1584     mdct
1585     pixelutils
1586     network
1587     rdft
1588 "
1589
1590 CONFIG_LIST="
1591     $COMPONENT_LIST
1592     $DOCUMENT_LIST
1593     $EXAMPLE_LIST
1594     $EXTERNAL_LIBRARY_LIST
1595     $FEATURE_LIST
1596     $HWACCEL_LIST
1597     $LICENSE_LIST
1598     $LIBRARY_LIST
1599     $PROGRAM_LIST
1600     $SUBSYSTEM_LIST
1601     fontconfig
1602     incompatible_libav_abi
1603     memalign_hack
1604     memory_poisoning
1605     neon_clobber_test
1606     pic
1607     pod2man
1608     raise_major
1609     thumb
1610     valgrind_backtrace
1611     xmm_clobber_test
1612 "
1613
1614 THREADS_LIST="
1615     pthreads
1616     os2threads
1617     w32threads
1618 "
1619
1620 ATOMICS_LIST="
1621     atomics_gcc
1622     atomics_suncc
1623     atomics_win32
1624 "
1625
1626 ARCH_LIST="
1627     aarch64
1628     alpha
1629     arm
1630     avr32
1631     avr32_ap
1632     avr32_uc
1633     bfin
1634     ia64
1635     m68k
1636     mips
1637     mips64
1638     parisc
1639     ppc
1640     ppc64
1641     s390
1642     sh4
1643     sparc
1644     sparc64
1645     tilegx
1646     tilepro
1647     tomi
1648     x86
1649     x86_32
1650     x86_64
1651 "
1652
1653 ARCH_EXT_LIST_ARM="
1654     armv5te
1655     armv6
1656     armv6t2
1657     armv8
1658     neon
1659     vfp
1660     vfpv3
1661     setend
1662 "
1663
1664 ARCH_EXT_LIST_MIPS="
1665     mipsfpu
1666     mips32r2
1667     mips64r6
1668     mipsdsp
1669     mipsdspr2
1670     msa
1671 "
1672
1673 ARCH_EXT_LIST_LOONGSON="
1674     loongson2
1675     loongson3
1676     mmi
1677 "
1678
1679 ARCH_EXT_LIST_X86_SIMD="
1680     aesni
1681     amd3dnow
1682     amd3dnowext
1683     avx
1684     avx2
1685     fma3
1686     fma4
1687     mmx
1688     mmxext
1689     sse
1690     sse2
1691     sse3
1692     sse4
1693     sse42
1694     ssse3
1695     xop
1696 "
1697
1698 ARCH_EXT_LIST_PPC="
1699     altivec
1700     dcbzl
1701     ldbrx
1702     power8
1703     ppc4xx
1704     vsx
1705 "
1706
1707 ARCH_EXT_LIST_X86="
1708     $ARCH_EXT_LIST_X86_SIMD
1709     cpunop
1710     i686
1711 "
1712
1713 ARCH_EXT_LIST="
1714     $ARCH_EXT_LIST_ARM
1715     $ARCH_EXT_LIST_PPC
1716     $ARCH_EXT_LIST_X86
1717     $ARCH_EXT_LIST_MIPS
1718     $ARCH_EXT_LIST_LOONGSON
1719 "
1720
1721 ARCH_FEATURES="
1722     aligned_stack
1723     fast_64bit
1724     fast_clz
1725     fast_cmov
1726     local_aligned_8
1727     local_aligned_16
1728     local_aligned_32
1729     simd_align_16
1730 "
1731
1732 BUILTIN_LIST="
1733     atomic_cas_ptr
1734     atomic_compare_exchange
1735     machine_rw_barrier
1736     MemoryBarrier
1737     mm_empty
1738     rdtsc
1739     sarestart
1740     sync_val_compare_and_swap
1741 "
1742 HAVE_LIST_CMDLINE="
1743     inline_asm
1744     symver
1745     yasm
1746 "
1747
1748 HAVE_LIST_PUB="
1749     bigendian
1750     fast_unaligned
1751     incompatible_libav_abi
1752 "
1753
1754 HEADERS_LIST="
1755     alsa_asoundlib_h
1756     altivec_h
1757     arpa_inet_h
1758     asm_types_h
1759     cdio_paranoia_h
1760     cdio_paranoia_paranoia_h
1761     dev_bktr_ioctl_bt848_h
1762     dev_bktr_ioctl_meteor_h
1763     dev_ic_bt8xx_h
1764     dev_video_bktr_ioctl_bt848_h
1765     dev_video_meteor_ioctl_meteor_h
1766     direct_h
1767     dirent_h
1768     dlfcn_h
1769     d3d11_h
1770     dxva_h
1771     ES2_gl_h
1772     gsm_h
1773     io_h
1774     mach_mach_time_h
1775     machine_ioctl_bt848_h
1776     machine_ioctl_meteor_h
1777     malloc_h
1778     openjpeg_1_5_openjpeg_h
1779     OpenGL_gl3_h
1780     poll_h
1781     sndio_h
1782     soundcard_h
1783     sys_mman_h
1784     sys_param_h
1785     sys_resource_h
1786     sys_select_h
1787     sys_soundcard_h
1788     sys_time_h
1789     sys_un_h
1790     sys_videoio_h
1791     termios_h
1792     udplite_h
1793     unistd_h
1794     valgrind_valgrind_h
1795     windows_h
1796     winsock2_h
1797 "
1798
1799 INTRINSICS_LIST="
1800     intrinsics_neon
1801 "
1802
1803 COMPLEX_FUNCS="
1804     cabs
1805     cexp
1806 "
1807
1808 MATH_FUNCS="
1809     atanf
1810     atan2f
1811     cbrt
1812     cbrtf
1813     copysign
1814     cosf
1815     erf
1816     exp2
1817     exp2f
1818     expf
1819     hypot
1820     isinf
1821     isnan
1822     ldexpf
1823     llrint
1824     llrintf
1825     log2
1826     log2f
1827     log10f
1828     lrint
1829     lrintf
1830     powf
1831     rint
1832     round
1833     roundf
1834     sinf
1835     trunc
1836     truncf
1837 "
1838
1839 SYSTEM_FUNCS="
1840     access
1841     aligned_malloc
1842     clock_gettime
1843     closesocket
1844     CommandLineToArgvW
1845     CoTaskMemFree
1846     CryptGenRandom
1847     dlopen
1848     fcntl
1849     flt_lim
1850     fork
1851     getaddrinfo
1852     gethrtime
1853     getopt
1854     GetProcessAffinityMask
1855     GetProcessMemoryInfo
1856     GetProcessTimes
1857     getrusage
1858     GetSystemTimeAsFileTime
1859     gettimeofday
1860     glob
1861     glXGetProcAddress
1862     gmtime_r
1863     inet_aton
1864     isatty
1865     jack_port_get_latency_range
1866     kbhit
1867     localtime_r
1868     lstat
1869     lzo1x_999_compress
1870     mach_absolute_time
1871     MapViewOfFile
1872     memalign
1873     mkstemp
1874     mmap
1875     mprotect
1876     nanosleep
1877     PeekNamedPipe
1878     posix_memalign
1879     pthread_cancel
1880     sched_getaffinity
1881     SetConsoleTextAttribute
1882     SetConsoleCtrlHandler
1883     setmode
1884     setrlimit
1885     Sleep
1886     strerror_r
1887     sysconf
1888     sysctl
1889     usleep
1890     UTGetOSTypeFromString
1891     VirtualAlloc
1892     wglGetProcAddress
1893 "
1894
1895 TOOLCHAIN_FEATURES="
1896     as_dn_directive
1897     as_func
1898     as_object_arch
1899     asm_mod_q
1900     attribute_may_alias
1901     attribute_packed
1902     ebp_available
1903     ebx_available
1904     gnu_as
1905     gnu_windres
1906     ibm_asm
1907     inline_asm_labels
1908     inline_asm_nonlocal_labels
1909     inline_asm_direct_symbol_refs
1910     pragma_deprecated
1911     rsync_contimeout
1912     symver_asm_label
1913     symver_gnu_asm
1914     vfp_args
1915     xform_asm
1916     xmm_clobbers
1917 "
1918
1919 TYPES_LIST="
1920     CONDITION_VARIABLE_Ptr
1921     socklen_t
1922     struct_addrinfo
1923     struct_group_source_req
1924     struct_ip_mreq_source
1925     struct_ipv6_mreq
1926     struct_pollfd
1927     struct_rusage_ru_maxrss
1928     struct_sctp_event_subscribe
1929     struct_sockaddr_in6
1930     struct_sockaddr_sa_len
1931     struct_sockaddr_storage
1932     struct_stat_st_mtim_tv_nsec
1933     struct_v4l2_frmivalenum_discrete
1934 "
1935
1936 HAVE_LIST="
1937     $ARCH_EXT_LIST
1938     $(add_suffix _external $ARCH_EXT_LIST)
1939     $(add_suffix _inline   $ARCH_EXT_LIST)
1940     $ARCH_FEATURES
1941     $ATOMICS_LIST
1942     $BUILTIN_LIST
1943     $COMPLEX_FUNCS
1944     $HAVE_LIST_CMDLINE
1945     $HAVE_LIST_PUB
1946     $HEADERS_LIST
1947     $INTRINSICS_LIST
1948     $MATH_FUNCS
1949     $SYSTEM_FUNCS
1950     $THREADS_LIST
1951     $TOOLCHAIN_FEATURES
1952     $TYPES_LIST
1953     atomics_native
1954     dos_paths
1955     dxva2api_cobj
1956     dxva2_lib
1957     winrt
1958     libc_msvcrt
1959     libdc1394_1
1960     libdc1394_2
1961     makeinfo
1962     makeinfo_html
1963     perl
1964     pod2man
1965     sdl
1966     section_data_rel_ro
1967     texi2html
1968     threads
1969     vaapi_x11
1970     vdpau_x11
1971     xlib
1972 "
1973
1974 # options emitted with CONFIG_ prefix but not available on the command line
1975 CONFIG_EXTRA="
1976     aandcttables
1977     ac3dsp
1978     audio_frame_queue
1979     audiodsp
1980     blockdsp
1981     bswapdsp
1982     cabac
1983     dvprofile
1984     exif
1985     faandct
1986     faanidct
1987     fdctdsp
1988     flacdsp
1989     fmtconvert
1990     frame_thread_encoder
1991     g722dsp
1992     golomb
1993     gplv3
1994     h263dsp
1995     h264chroma
1996     h264dsp
1997     h264pred
1998     h264qpel
1999     hpeldsp
2000     huffman
2001     huffyuvdsp
2002     huffyuvencdsp
2003     idctdsp
2004     iirfilter
2005     imdct15
2006     intrax8
2007     ividsp
2008     jpegtables
2009     libx262
2010     lgplv3
2011     llauddsp
2012     llviddsp
2013     lpc
2014     lzf
2015     me_cmp
2016     mpeg_er
2017     mpegaudio
2018     mpegaudiodsp
2019     mpegvideo
2020     mpegvideoenc
2021     mss34dsp
2022     pixblockdsp
2023     qpeldsp
2024     qsv
2025     qsvdec
2026     qsvenc
2027     rangecoder
2028     riffdec
2029     riffenc
2030     rtpdec
2031     rtpenc_chain
2032     rv34dsp
2033     sinewin
2034     snappy
2035     startcode
2036     texturedsp
2037     texturedspenc
2038     tpeldsp
2039     videodsp
2040     vp3dsp
2041     vp56dsp
2042     vp8dsp
2043     wma_freqs
2044     wmv2dsp
2045 "
2046
2047 CMDLINE_SELECT="
2048     $ARCH_EXT_LIST
2049     $CONFIG_LIST
2050     $HAVE_LIST_CMDLINE
2051     $THREADS_LIST
2052     asm
2053     cross_compile
2054     debug
2055     extra_warnings
2056     logging
2057     lto
2058     optimizations
2059     rpath
2060     stripping
2061 "
2062
2063 PATHS_LIST="
2064     bindir
2065     datadir
2066     docdir
2067     incdir
2068     libdir
2069     mandir
2070     pkgconfigdir
2071     prefix
2072     shlibdir
2073 "
2074
2075 CMDLINE_SET="
2076     $PATHS_LIST
2077     ar
2078     arch
2079     as
2080     assert_level
2081     build_suffix
2082     cc
2083     objcc
2084     cpu
2085     cross_prefix
2086     custom_allocator
2087     cxx
2088     dep_cc
2089     doxygen
2090     env
2091     extra_version
2092     gas
2093     host_cc
2094     host_cflags
2095     host_ld
2096     host_ldflags
2097     host_libs
2098     host_os
2099     install
2100     ld
2101     logfile
2102     malloc_prefix
2103     nm
2104     optflags
2105     pkg_config
2106     pkg_config_flags
2107     progs_suffix
2108     random_seed
2109     ranlib
2110     samples
2111     strip
2112     sws_max_filter_size
2113     sysinclude
2114     sysroot
2115     target_exec
2116     target_os
2117     target_path
2118     target_samples
2119     tempprefix
2120     toolchain
2121     valgrind
2122     yasmexe
2123 "
2124
2125 CMDLINE_APPEND="
2126     extra_cflags
2127     extra_cxxflags
2128     extra_objcflags
2129     host_cppflags
2130 "
2131
2132 # code dependency declarations
2133
2134 # architecture extensions
2135
2136 armv5te_deps="arm"
2137 armv6_deps="arm"
2138 armv6t2_deps="arm"
2139 armv8_deps="aarch64"
2140 neon_deps_any="aarch64 arm"
2141 intrinsics_neon_deps="neon"
2142 vfp_deps_any="aarch64 arm"
2143 vfpv3_deps="vfp"
2144 setend_deps="arm"
2145
2146 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
2147
2148 mipsfpu_deps="mips"
2149 mipsdsp_deps="mips"
2150 mipsdspr2_deps="mips"
2151 mips32r2_deps="mips"
2152 mips64r6_deps="mips"
2153 msa_deps="mips"
2154 mmi_deps="mips"
2155
2156 altivec_deps="ppc"
2157 dcbzl_deps="ppc"
2158 ldbrx_deps="ppc"
2159 ppc4xx_deps="ppc"
2160 vsx_deps="altivec"
2161 power8_deps="vsx"
2162
2163 cpunop_deps="i686"
2164 x86_64_select="i686"
2165 x86_64_suggest="fast_cmov"
2166
2167 amd3dnow_deps="mmx"
2168 amd3dnowext_deps="amd3dnow"
2169 i686_deps="x86"
2170 mmx_deps="x86"
2171 mmxext_deps="mmx"
2172 sse_deps="mmxext"
2173 sse2_deps="sse"
2174 sse3_deps="sse2"
2175 ssse3_deps="sse3"
2176 sse4_deps="ssse3"
2177 sse42_deps="sse4"
2178 aesni_deps="sse42"
2179 avx_deps="sse42"
2180 xop_deps="avx"
2181 fma3_deps="avx"
2182 fma4_deps="avx"
2183 avx2_deps="avx"
2184
2185 mmx_external_deps="yasm"
2186 mmx_inline_deps="inline_asm"
2187 mmx_suggest="mmx_external mmx_inline"
2188
2189 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
2190     eval dep=\$${ext}_deps
2191     eval ${ext}_external_deps='"${dep}_external"'
2192     eval ${ext}_inline_deps='"${dep}_inline"'
2193     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
2194 done
2195
2196 aligned_stack_if_any="aarch64 ppc x86"
2197 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
2198 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
2199 fast_unaligned_if_any="aarch64 ppc x86"
2200 simd_align_16_if_any="altivec neon sse"
2201
2202 # system capabilities
2203 symver_if_any="symver_asm_label symver_gnu_asm"
2204 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
2205
2206 # threading support
2207 atomics_gcc_if_any="sync_val_compare_and_swap atomic_compare_exchange"
2208 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
2209 atomics_win32_if="MemoryBarrier"
2210 atomics_native_if_any="$ATOMICS_LIST"
2211 w32threads_deps="atomics_native"
2212 threads_if_any="$THREADS_LIST"
2213
2214 # subsystems
2215 dct_select="rdft"
2216 error_resilience_select="me_cmp"
2217 faandct_deps="faan fdctdsp"
2218 faanidct_deps="faan idctdsp"
2219 frame_thread_encoder_deps="encoders threads"
2220 intrax8_select="error_resilience"
2221 mdct_select="fft"
2222 rdft_select="fft"
2223 me_cmp_select="fdctdsp idctdsp pixblockdsp"
2224 mpeg_er_select="error_resilience"
2225 mpegaudio_select="mpegaudiodsp"
2226 mpegaudiodsp_select="dct"
2227 mpegvideo_select="blockdsp h264chroma hpeldsp idctdsp me_cmp mpeg_er videodsp"
2228 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
2229 qsvdec_select="qsv"
2230 qsvenc_select="qsv"
2231
2232 # decoders / encoders
2233 aac_decoder_select="imdct15 mdct sinewin"
2234 aac_fixed_decoder_select="mdct sinewin"
2235 aac_encoder_select="audio_frame_queue iirfilter lpc mdct sinewin"
2236 aac_latm_decoder_select="aac_decoder aac_latm_parser"
2237 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
2238 ac3_fixed_decoder_select="ac3_parser ac3dsp bswapdsp mdct"
2239 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
2240 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
2241 adpcm_g722_decoder_select="g722dsp"
2242 adpcm_g722_encoder_select="g722dsp"
2243 aic_decoder_select="golomb idctdsp"
2244 alac_encoder_select="lpc"
2245 als_decoder_select="bswapdsp"
2246 amrnb_decoder_select="lsp"
2247 amrwb_decoder_select="lsp"
2248 amv_decoder_select="sp5x_decoder exif"
2249 amv_encoder_select="aandcttables jpegtables mpegvideoenc"
2250 ape_decoder_select="bswapdsp llauddsp"
2251 apng_decoder_select="zlib"
2252 apng_encoder_select="huffyuvencdsp zlib"
2253 asv1_decoder_select="blockdsp bswapdsp idctdsp"
2254 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
2255 asv2_decoder_select="blockdsp bswapdsp idctdsp"
2256 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
2257 atrac1_decoder_select="mdct sinewin"
2258 atrac3_decoder_select="mdct"
2259 atrac3p_decoder_select="mdct sinewin"
2260 avrn_decoder_select="exif jpegtables"
2261 bink_decoder_select="blockdsp hpeldsp"
2262 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
2263 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
2264 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
2265 cllc_decoder_select="bswapdsp"
2266 comfortnoise_encoder_select="lpc"
2267 cook_decoder_select="audiodsp mdct sinewin"
2268 cscd_decoder_select="lzo"
2269 cscd_decoder_suggest="zlib"
2270 dca_decoder_select="fmtconvert mdct"
2271 dds_decoder_select="texturedsp"
2272 dirac_decoder_select="dwt golomb videodsp mpegvideoenc"
2273 dnxhd_decoder_select="blockdsp idctdsp"
2274 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
2275 dvvideo_decoder_select="dvprofile idctdsp"
2276 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
2277 dxa_decoder_select="zlib"
2278 dxv_decoder_select="lzf texturedsp"
2279 eac3_decoder_select="ac3_decoder"
2280 eac3_encoder_select="ac3_encoder"
2281 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
2282 eatgq_decoder_select="aandcttables"
2283 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpeg1video_decoder"
2284 exr_decoder_select="zlib"
2285 ffv1_decoder_select="golomb rangecoder"
2286 ffv1_encoder_select="rangecoder"
2287 ffvhuff_decoder_select="huffyuv_decoder"
2288 ffvhuff_encoder_select="huffyuv_encoder"
2289 fic_decoder_select="golomb"
2290 flac_decoder_select="flacdsp golomb"
2291 flac_encoder_select="bswapdsp flacdsp golomb lpc"
2292 flashsv_decoder_select="zlib"
2293 flashsv_encoder_select="zlib"
2294 flashsv2_encoder_select="zlib"
2295 flashsv2_decoder_select="zlib"
2296 flv_decoder_select="h263_decoder"
2297 flv_encoder_select="h263_encoder"
2298 fourxm_decoder_select="blockdsp bswapdsp"
2299 fraps_decoder_select="bswapdsp huffman"
2300 g2m_decoder_select="blockdsp idctdsp jpegtables zlib"
2301 g729_decoder_select="audiodsp"
2302 h261_decoder_select="mpegvideo"
2303 h261_encoder_select="aandcttables mpegvideoenc"
2304 h263_decoder_select="h263_parser h263dsp mpegvideo qpeldsp"
2305 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
2306 h263i_decoder_select="h263_decoder"
2307 h263p_decoder_select="h263_decoder"
2308 h263p_encoder_select="h263_encoder"
2309 h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel startcode videodsp"
2310 h264_decoder_suggest="error_resilience"
2311 h264_qsv_decoder_deps="libmfx"
2312 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
2313 h264_qsv_encoder_deps="libmfx"
2314 h264_qsv_encoder_select="qsvenc"
2315 hap_decoder_select="snappy texturedsp"
2316 hap_encoder_deps="libsnappy"
2317 hap_encoder_select="texturedspenc"
2318 hevc_decoder_select="bswapdsp cabac golomb videodsp"
2319 hevc_qsv_encoder_deps="libmfx"
2320 hevc_qsv_decoder_deps="libmfx"
2321 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser qsvdec hevc_qsv_hwaccel"
2322 hevc_qsv_encoder_select="qsvenc"
2323 huffyuv_decoder_select="bswapdsp huffyuvdsp llviddsp"
2324 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp llviddsp"
2325 iac_decoder_select="imc_decoder"
2326 imc_decoder_select="bswapdsp fft mdct sinewin"
2327 indeo3_decoder_select="hpeldsp"
2328 indeo4_decoder_select="ividsp"
2329 indeo5_decoder_select="ividsp"
2330 interplay_video_decoder_select="hpeldsp"
2331 jpegls_decoder_select="golomb mjpeg_decoder"
2332 jpegls_encoder_select="golomb"
2333 jv_decoder_select="blockdsp"
2334 lagarith_decoder_select="huffyuvdsp"
2335 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
2336 loco_decoder_select="golomb"
2337 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2338 metasound_decoder_select="lsp mdct sinewin"
2339 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2340 mjpeg_decoder_select="blockdsp hpeldsp exif idctdsp jpegtables"
2341 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
2342 mjpegb_decoder_select="mjpeg_decoder"
2343 mlp_decoder_select="mlp_parser"
2344 motionpixels_decoder_select="bswapdsp"
2345 mp1_decoder_select="mpegaudio"
2346 mp1float_decoder_select="mpegaudio"
2347 mp2_decoder_select="mpegaudio"
2348 mp2float_decoder_select="mpegaudio"
2349 mp3_decoder_select="mpegaudio"
2350 mp3adu_decoder_select="mpegaudio"
2351 mp3adufloat_decoder_select="mpegaudio"
2352 mp3float_decoder_select="mpegaudio"
2353 mp3on4_decoder_select="mpegaudio"
2354 mp3on4float_decoder_select="mpegaudio"
2355 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2356 mpc8_decoder_select="mpegaudiodsp"
2357 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2358 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2359 mpegvideo_decoder_select="mpegvideo"
2360 mpeg1video_decoder_select="mpegvideo"
2361 mpeg1video_encoder_select="aandcttables mpegvideoenc h263dsp"
2362 mpeg2video_decoder_select="mpegvideo"
2363 mpeg2video_encoder_select="aandcttables mpegvideoenc h263dsp"
2364 mpeg2_qsv_decoder_deps="libmfx"
2365 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel"
2366 mpeg2_qsv_encoder_deps="libmfx"
2367 mpeg2_qsv_encoder_select="qsvenc"
2368 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2369 mpeg4_encoder_select="h263_encoder"
2370 msa1_decoder_select="mss34dsp"
2371 msmpeg4v1_decoder_select="h263_decoder"
2372 msmpeg4v2_decoder_select="h263_decoder"
2373 msmpeg4v2_encoder_select="h263_encoder"
2374 msmpeg4v3_decoder_select="h263_decoder"
2375 msmpeg4v3_encoder_select="h263_encoder"
2376 mss2_decoder_select="vc1_decoder"
2377 mts2_decoder_select="mss34dsp"
2378 mxpeg_decoder_select="mjpeg_decoder"
2379 nellymoser_decoder_select="mdct sinewin"
2380 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2381 nuv_decoder_select="idctdsp lzo"
2382 on2avc_decoder_select="mdct"
2383 opus_decoder_deps="swresample"
2384 opus_decoder_select="imdct15"
2385 png_decoder_select="zlib"
2386 png_encoder_select="huffyuvencdsp zlib"
2387 prores_decoder_select="blockdsp idctdsp"
2388 prores_encoder_select="fdctdsp"
2389 qcelp_decoder_select="lsp"
2390 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2391 ra_144_encoder_select="audio_frame_queue lpc audiodsp"
2392 ra_144_decoder_select="audiodsp"
2393 ralf_decoder_select="golomb"
2394 rawvideo_decoder_select="bswapdsp"
2395 rscc_decoder_select="zlib"
2396 rtjpeg_decoder_select="me_cmp"
2397 rv10_decoder_select="h263_decoder"
2398 rv10_encoder_select="h263_encoder"
2399 rv20_decoder_select="h263_decoder"
2400 rv20_encoder_select="h263_encoder"
2401 rv30_decoder_select="golomb h264pred h264qpel mpegvideo rv34dsp"
2402 rv40_decoder_select="golomb h264pred h264qpel mpegvideo rv34dsp"
2403 screenpresso_decoder_select="zlib"
2404 shorten_decoder_select="golomb"
2405 sipr_decoder_select="lsp"
2406 snow_decoder_select="dwt h264qpel hpeldsp me_cmp rangecoder videodsp"
2407 snow_encoder_select="aandcttables dwt h264qpel hpeldsp me_cmp mpegvideoenc rangecoder"
2408 sonic_decoder_select="golomb rangecoder"
2409 sonic_encoder_select="golomb rangecoder"
2410 sonic_ls_encoder_select="golomb rangecoder"
2411 sp5x_decoder_select="mjpeg_decoder"
2412 svq1_decoder_select="hpeldsp"
2413 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2414 svq3_decoder_select="h264_decoder hpeldsp tpeldsp"
2415 svq3_decoder_suggest="zlib"
2416 tak_decoder_select="audiodsp"
2417 tdsc_decoder_select="zlib mjpeg_decoder"
2418 theora_decoder_select="vp3_decoder"
2419 thp_decoder_select="mjpeg_decoder"
2420 tiff_decoder_suggest="zlib lzma"
2421 tiff_encoder_suggest="zlib"
2422 truehd_decoder_select="mlp_parser"
2423 truemotion2_decoder_select="bswapdsp"
2424 truespeech_decoder_select="bswapdsp"
2425 tscc_decoder_select="zlib"
2426 twinvq_decoder_select="mdct lsp sinewin"
2427 txd_decoder_select="texturedsp"
2428 utvideo_decoder_select="bswapdsp"
2429 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2430 vble_decoder_select="huffyuvdsp"
2431 vc1_decoder_select="blockdsp h263_decoder h264qpel intrax8 qpeldsp startcode"
2432 vc1image_decoder_select="vc1_decoder"
2433 vc1_qsv_decoder_deps="libmfx"
2434 vc1_qsv_decoder_select="qsvdec vc1_qsv_hwaccel"
2435 vorbis_decoder_select="mdct"
2436 vorbis_encoder_select="mdct"
2437 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2438 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2439 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2440 vp6a_decoder_select="vp6_decoder"
2441 vp6f_decoder_select="vp6_decoder"
2442 vp7_decoder_select="h264pred videodsp vp8dsp"
2443 vp8_decoder_select="h264pred videodsp vp8dsp"
2444 vp9_decoder_select="videodsp vp9_parser"
2445 webp_decoder_select="vp8_decoder"
2446 wmalossless_decoder_select="llauddsp"
2447 wmapro_decoder_select="mdct sinewin wma_freqs"
2448 wmav1_decoder_select="mdct sinewin wma_freqs"
2449 wmav1_encoder_select="mdct sinewin wma_freqs"
2450 wmav2_decoder_select="mdct sinewin wma_freqs"
2451 wmav2_encoder_select="mdct sinewin wma_freqs"
2452 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2453 wmv1_decoder_select="h263_decoder"
2454 wmv1_encoder_select="h263_encoder"
2455 wmv2_decoder_select="blockdsp h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2456 wmv2_encoder_select="h263_encoder wmv2dsp"
2457 wmv3_decoder_select="vc1_decoder"
2458 wmv3image_decoder_select="wmv3_decoder"
2459 zerocodec_decoder_select="zlib"
2460 zlib_decoder_select="zlib"
2461 zlib_encoder_select="zlib"
2462 zmbv_decoder_select="zlib"
2463 zmbv_encoder_select="zlib"
2464
2465 # hardware accelerators
2466 crystalhd_deps="libcrystalhd_libcrystalhd_if_h"
2467 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder ID3D11VideoContext"
2468 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2469 vaapi_deps="va_va_h"
2470 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2471 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2472 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2473 videotoolbox_deps="VideoToolbox_VideoToolbox_h pthreads"
2474 videotoolbox_extralibs="-framework CoreFoundation -framework VideoToolbox -framework CoreMedia -framework QuartzCore -framework CoreVideo"
2475 xvmc_deps="X11_extensions_XvMClib_h"
2476
2477 h263_vaapi_hwaccel_deps="vaapi"
2478 h263_vaapi_hwaccel_select="h263_decoder"
2479 h263_videotoolbox_hwaccel_deps="videotoolbox"
2480 h263_videotoolbox_hwaccel_select="h263_decoder"
2481 h264_crystalhd_decoder_select="crystalhd h264_mp4toannexb_bsf h264_parser"
2482 h264_d3d11va_hwaccel_deps="d3d11va"
2483 h264_d3d11va_hwaccel_select="h264_decoder"
2484 h264_dxva2_hwaccel_deps="dxva2"
2485 h264_dxva2_hwaccel_select="h264_decoder"
2486 h264_mmal_decoder_deps="mmal"
2487 h264_mmal_hwaccel_deps="mmal"
2488 h264_mmal_decoder_select="h264_decoder"
2489 h264_mmal_encoder_deps="mmal"
2490 h264_qsv_hwaccel_deps="libmfx"
2491 h264_vaapi_hwaccel_deps="vaapi"
2492 h264_vaapi_hwaccel_select="h264_decoder"
2493 h264_vda_decoder_deps="vda"
2494 h264_vda_decoder_select="h264_decoder"
2495 h264_vda_hwaccel_deps="vda"
2496 h264_vda_hwaccel_select="h264_decoder"
2497 h264_vda_old_hwaccel_deps="vda"
2498 h264_vda_old_hwaccel_select="h264_decoder"
2499 h264_vdpau_decoder_deps="vdpau"
2500 h264_vdpau_decoder_select="h264_decoder"
2501 h264_vdpau_hwaccel_deps="vdpau"
2502 h264_vdpau_hwaccel_select="h264_decoder"
2503 h264_videotoolbox_hwaccel_deps="videotoolbox"
2504 h264_videotoolbox_hwaccel_select="h264_decoder"
2505 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2506 hevc_d3d11va_hwaccel_select="hevc_decoder"
2507 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2508 hevc_dxva2_hwaccel_select="hevc_decoder"
2509 hevc_qsv_hwaccel_deps="libmfx"
2510 hevc_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferHEVC"
2511 hevc_vaapi_hwaccel_select="hevc_decoder"
2512 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2513 hevc_vdpau_hwaccel_select="hevc_decoder"
2514 mpeg_vdpau_decoder_deps="vdpau"
2515 mpeg_vdpau_decoder_select="mpeg2video_decoder"
2516 mpeg_xvmc_hwaccel_deps="xvmc"
2517 mpeg_xvmc_hwaccel_select="mpeg2video_decoder"
2518 mpeg1_vdpau_decoder_deps="vdpau"
2519 mpeg1_vdpau_decoder_select="mpeg1video_decoder"
2520 mpeg1_vdpau_hwaccel_deps="vdpau"
2521 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2522 mpeg1_videotoolbox_hwaccel_deps="videotoolbox"
2523 mpeg1_videotoolbox_hwaccel_select="mpeg1video_decoder"
2524 mpeg1_xvmc_hwaccel_deps="xvmc"
2525 mpeg1_xvmc_hwaccel_select="mpeg1video_decoder"
2526 mpeg2_crystalhd_decoder_select="crystalhd"
2527 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2528 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2529 mpeg2_dxva2_hwaccel_deps="dxva2"
2530 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2531 mpeg2_mmal_decoder_deps="mmal"
2532 mpeg2_mmal_hwaccel_deps="mmal"
2533 mpeg2_mmal_decoder_select="mpeg2video_decoder"
2534 mpeg2_qsv_hwaccel_deps="libmfx"
2535 mpeg2_qsv_hwaccel_select="qsvdec_mpeg2"
2536 mpeg2_vaapi_hwaccel_deps="vaapi"
2537 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2538 mpeg2_vdpau_hwaccel_deps="vdpau"
2539 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2540 mpeg2_videotoolbox_hwaccel_deps="videotoolbox"
2541 mpeg2_videotoolbox_hwaccel_select="mpeg2video_decoder"
2542 mpeg2_xvmc_hwaccel_deps="xvmc"
2543 mpeg2_xvmc_hwaccel_select="mpeg2video_decoder"
2544 mpeg4_crystalhd_decoder_select="crystalhd"
2545 mpeg4_vaapi_hwaccel_deps="vaapi"
2546 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2547 mpeg4_vdpau_decoder_deps="vdpau"
2548 mpeg4_vdpau_decoder_select="mpeg4_decoder"
2549 mpeg4_vdpau_hwaccel_deps="vdpau"
2550 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2551 mpeg4_videotoolbox_hwaccel_deps="videotoolbox"
2552 mpeg4_videotoolbox_hwaccel_select="mpeg4_decoder"
2553 msmpeg4_crystalhd_decoder_select="crystalhd"
2554 vc1_crystalhd_decoder_select="crystalhd"
2555 vc1_d3d11va_hwaccel_deps="d3d11va"
2556 vc1_d3d11va_hwaccel_select="vc1_decoder"
2557 vc1_dxva2_hwaccel_deps="dxva2"
2558 vc1_dxva2_hwaccel_select="vc1_decoder"
2559 vc1_vaapi_hwaccel_deps="vaapi"
2560 vc1_vaapi_hwaccel_select="vc1_decoder"
2561 vc1_vdpau_decoder_deps="vdpau"
2562 vc1_vdpau_decoder_select="vc1_decoder"
2563 vc1_vdpau_hwaccel_deps="vdpau"
2564 vc1_vdpau_hwaccel_select="vc1_decoder"
2565 vc1_mmal_decoder_deps="mmal"
2566 vc1_mmal_hwaccel_deps="mmal"
2567 vc1_mmal_decoder_select="vc1_decoder"
2568 vc1_qsv_hwaccel_deps="libmfx"
2569 vc1_qsv_hwaccel_select="qsvdec_vc1"
2570 wmv3_crystalhd_decoder_select="crystalhd"
2571 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2572 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2573 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2574 wmv3_vdpau_decoder_select="vc1_vdpau_decoder"
2575 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2576
2577 # parsers
2578 h264_parser_select="h264_decoder"
2579 hevc_parser_select="golomb"
2580 mpegvideo_parser_select="mpegvideo"
2581 mpeg4video_parser_select="h263dsp mpegvideo qpeldsp"
2582 vc1_parser_select="mpegvideo startcode vc1_decoder"
2583
2584 # bitstream_filters
2585 mjpeg2jpeg_bsf_select="jpegtables"
2586
2587 # external libraries
2588 chromaprint_muxer_deps="chromaprint"
2589 libaacplus_encoder_deps="libaacplus"
2590 libcelt_decoder_deps="libcelt"
2591 libdcadec_decoder_deps="libdcadec"
2592 libfaac_encoder_deps="libfaac"
2593 libfaac_encoder_select="audio_frame_queue"
2594 libfdk_aac_decoder_deps="libfdk_aac"
2595 libfdk_aac_encoder_deps="libfdk_aac"
2596 libfdk_aac_encoder_select="audio_frame_queue"
2597 libgme_demuxer_deps="libgme"
2598 libgsm_decoder_deps="libgsm"
2599 libgsm_encoder_deps="libgsm"
2600 libgsm_ms_decoder_deps="libgsm"
2601 libgsm_ms_encoder_deps="libgsm"
2602 libilbc_decoder_deps="libilbc"
2603 libilbc_encoder_deps="libilbc"
2604 libkvazaar_encoder_deps="libkvazaar"
2605 libmodplug_demuxer_deps="libmodplug"
2606 libmp3lame_encoder_deps="libmp3lame"
2607 libmp3lame_encoder_select="audio_frame_queue"
2608 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2609 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2610 libopencore_amrnb_encoder_select="audio_frame_queue"
2611 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2612 libopenh264_encoder_deps="libopenh264"
2613 libopenjpeg_decoder_deps="libopenjpeg"
2614 libopenjpeg_encoder_deps="libopenjpeg"
2615 libopus_decoder_deps="libopus"
2616 libopus_encoder_deps="libopus"
2617 libopus_encoder_select="audio_frame_queue"
2618 libquvi_demuxer_deps="libquvi"
2619 libschroedinger_decoder_deps="libschroedinger"
2620 libschroedinger_encoder_deps="libschroedinger"
2621 libshine_encoder_deps="libshine"
2622 libshine_encoder_select="audio_frame_queue"
2623 libspeex_decoder_deps="libspeex"
2624 libspeex_encoder_deps="libspeex"
2625 libspeex_encoder_select="audio_frame_queue"
2626 libstagefright_h264_decoder_deps="libstagefright_h264"
2627 libtheora_encoder_deps="libtheora"
2628 libtwolame_encoder_deps="libtwolame"
2629 libvo_aacenc_encoder_deps="libvo_aacenc"
2630 libvo_aacenc_encoder_select="audio_frame_queue"
2631 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2632 libvorbis_decoder_deps="libvorbis"
2633 libvorbis_encoder_deps="libvorbis"
2634 libvorbis_encoder_select="audio_frame_queue"
2635 libvpx_vp8_decoder_deps="libvpx"
2636 libvpx_vp8_encoder_deps="libvpx"
2637 libvpx_vp9_decoder_deps="libvpx"
2638 libvpx_vp9_encoder_deps="libvpx"
2639 libwavpack_encoder_deps="libwavpack"
2640 libwebp_encoder_deps="libwebp"
2641 libwebp_anim_encoder_deps="libwebp"
2642 libx262_encoder_deps="libx262"
2643 libx264_encoder_deps="libx264"
2644 libx264rgb_encoder_deps="libx264"
2645 libx264rgb_encoder_select="libx264_encoder"
2646 libx265_encoder_deps="libx265"
2647 libxavs_encoder_deps="libxavs"
2648 libxvid_encoder_deps="libxvid"
2649 libutvideo_decoder_deps="libutvideo"
2650 libutvideo_encoder_deps="libutvideo"
2651 libzvbi_teletext_decoder_deps="libzvbi"
2652 nvenc_encoder_deps="nvenc"
2653 nvenc_h264_encoder_deps="nvenc"
2654 nvenc_hevc_encoder_deps="nvenc"
2655
2656 # demuxers / muxers
2657 ac3_demuxer_select="ac3_parser"
2658 asf_demuxer_select="riffdec"
2659 asf_o_demuxer_select="riffdec"
2660 asf_muxer_select="riffenc"
2661 asf_stream_muxer_select="asf_muxer"
2662 avi_demuxer_select="riffdec exif"
2663 avi_muxer_select="riffenc"
2664 avisynth_demuxer_deps="avisynth"
2665 avisynth_demuxer_select="riffdec"
2666 caf_demuxer_select="riffdec"
2667 dash_muxer_select="mp4_muxer"
2668 dirac_demuxer_select="dirac_parser"
2669 dts_demuxer_select="dca_parser"
2670 dtshd_demuxer_select="dca_parser"
2671 dv_demuxer_select="dvprofile"
2672 dv_muxer_select="dvprofile"
2673 dxa_demuxer_select="riffdec"
2674 eac3_demuxer_select="ac3_parser"
2675 f4v_muxer_select="mov_muxer"
2676 flac_demuxer_select="flac_parser"
2677 hds_muxer_select="flv_muxer"
2678 hls_muxer_select="mpegts_muxer"
2679 image2_alias_pix_demuxer_select="image2_demuxer"
2680 image2_brender_pix_demuxer_select="image2_demuxer"
2681 ipod_muxer_select="mov_muxer"
2682 ismv_muxer_select="mov_muxer"
2683 libnut_demuxer_deps="libnut"
2684 libnut_muxer_deps="libnut"
2685 matroska_audio_muxer_select="matroska_muxer"
2686 matroska_demuxer_select="riffdec"
2687 matroska_demuxer_suggest="bzlib lzo zlib"
2688 matroska_muxer_select="riffenc"
2689 mmf_muxer_select="riffenc"
2690 mov_demuxer_select="riffdec"
2691 mov_demuxer_suggest="zlib"
2692 mov_muxer_select="riffenc rtpenc_chain"
2693 mp3_demuxer_select="mpegaudio_parser"
2694 mp4_muxer_select="mov_muxer"
2695 mpegts_muxer_select="adts_muxer latm_muxer"
2696 mpegtsraw_demuxer_select="mpegts_demuxer"
2697 mxf_d10_muxer_select="mxf_muxer"
2698 mxf_opatom_muxer_select="mxf_muxer"
2699 nut_muxer_select="riffenc"
2700 nuv_demuxer_select="riffdec"
2701 oga_muxer_select="ogg_muxer"
2702 ogg_demuxer_select="golomb"
2703 opus_muxer_select="ogg_muxer"
2704 psp_muxer_select="mov_muxer"
2705 rtp_demuxer_select="sdp_demuxer"
2706 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol"
2707 rtsp_demuxer_select="http_protocol rtpdec"
2708 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2709 sap_demuxer_select="sdp_demuxer"
2710 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2711 sdp_demuxer_select="rtpdec"
2712 smoothstreaming_muxer_select="ismv_muxer"
2713 spdif_muxer_select="aac_parser"
2714 spx_muxer_select="ogg_muxer"
2715 tak_demuxer_select="tak_parser"
2716 tg2_muxer_select="mov_muxer"
2717 tgp_muxer_select="mov_muxer"
2718 vobsub_demuxer_select="mpegps_demuxer"
2719 w64_demuxer_select="wav_demuxer"
2720 w64_muxer_select="wav_muxer"
2721 wav_demuxer_select="riffdec"
2722 wav_muxer_select="riffenc"
2723 webm_muxer_select="riffenc"
2724 wtv_demuxer_select="riffdec"
2725 wtv_muxer_select="riffenc"
2726 xmv_demuxer_select="riffdec"
2727 xwma_demuxer_select="riffdec"
2728
2729 # indevs / outdevs
2730 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2731 alsa_outdev_deps="alsa_asoundlib_h"
2732 avfoundation_indev_extralibs="-framework CoreVideo -framework Foundation -framework AVFoundation -framework CoreMedia"
2733 avfoundation_indev_select="avfoundation"
2734 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2735 caca_outdev_deps="libcaca"
2736 decklink_outdev_deps="decklink pthreads"
2737 decklink_outdev_extralibs="-lstdc++"
2738 decklink_indev_deps="decklink pthreads"
2739 decklink_indev_extralibs="-lstdc++"
2740 dshow_indev_deps="IBaseFilter"
2741 dshow_indev_extralibs="-lpsapi -lole32 -lstrmiids -luuid -loleaut32 -lshlwapi"
2742 dv1394_indev_deps="dv1394"
2743 dv1394_indev_select="dv_demuxer"
2744 fbdev_indev_deps="linux_fb_h"
2745 fbdev_outdev_deps="linux_fb_h"
2746 gdigrab_indev_deps="CreateDIBSection"
2747 gdigrab_indev_extralibs="-lgdi32"
2748 gdigrab_indev_select="bmp_decoder"
2749 iec61883_indev_deps="libiec61883"
2750 jack_indev_deps="jack_jack_h sem_timedwait"
2751 lavfi_indev_deps="avfilter"
2752 libcdio_indev_deps="libcdio"
2753 libdc1394_indev_deps="libdc1394"
2754 libv4l2_indev_deps="libv4l2"
2755 openal_indev_deps="openal"
2756 opengl_outdev_deps="opengl"
2757 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2758 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2759 pulse_indev_deps="libpulse"
2760 pulse_outdev_deps="libpulse"
2761 qtkit_indev_extralibs="-framework QTKit -framework Foundation -framework QuartzCore"
2762 qtkit_indev_select="qtkit"
2763 sdl_outdev_deps="sdl"
2764 sndio_indev_deps="sndio_h"
2765 sndio_outdev_deps="sndio_h"
2766 v4l_indev_deps="linux_videodev_h"
2767 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2768 v4l2_outdev_deps_any="linux_videodev2_h sys_videoio_h"
2769 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2770 vfwcap_indev_extralibs="-lavicap32"
2771 xv_outdev_deps="X11_extensions_Xvlib_h XvGetPortAttribute"
2772 xv_outdev_extralibs="-lXv -lX11 -lXext"
2773 x11grab_indev_deps="x11grab"
2774 x11grab_xcb_indev_deps="libxcb"
2775
2776 # protocols
2777 async_protocol_deps="threads"
2778 bluray_protocol_deps="libbluray"
2779 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2780 ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
2781 ffrtmpcrypt_protocol_select="tcp_protocol"
2782 ffrtmphttp_protocol_deps="!librtmp_protocol"
2783 ffrtmphttp_protocol_select="http_protocol"
2784 ftp_protocol_select="tcp_protocol"
2785 gopher_protocol_select="network"
2786 http_protocol_select="tcp_protocol"
2787 httpproxy_protocol_select="tcp_protocol"
2788 https_protocol_select="tls_protocol"
2789 icecast_protocol_select="http_protocol"
2790 librtmp_protocol_deps="librtmp"
2791 librtmpe_protocol_deps="librtmp"
2792 librtmps_protocol_deps="librtmp"
2793 librtmpt_protocol_deps="librtmp"
2794 librtmpte_protocol_deps="librtmp"
2795 libsmbclient_protocol_deps="libsmbclient gplv3"
2796 libssh_protocol_deps="libssh"
2797 mmsh_protocol_select="http_protocol"
2798 mmst_protocol_select="network"
2799 rtmp_protocol_deps="!librtmp_protocol"
2800 rtmp_protocol_select="tcp_protocol"
2801 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2802 rtmps_protocol_deps="!librtmp_protocol"
2803 rtmps_protocol_select="tls_protocol"
2804 rtmpt_protocol_select="ffrtmphttp_protocol"
2805 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2806 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2807 rtp_protocol_select="udp_protocol"
2808 sctp_protocol_deps="struct_sctp_event_subscribe"
2809 sctp_protocol_select="network"
2810 srtp_protocol_select="rtp_protocol"
2811 tcp_protocol_select="network"
2812 tls_gnutls_protocol_deps="gnutls !tls_schannel_protocol !tls_securetransport_protocol"
2813 tls_gnutls_protocol_select="tcp_protocol"
2814 tls_openssl_protocol_deps="openssl !tls_schannel_protocol !tls_securetransport_protocol !tls_gnutls_protocol"
2815 tls_openssl_protocol_select="tcp_protocol"
2816 tls_schannel_protocol_deps="schannel"
2817 tls_schannel_protocol_select="tcp_protocol"
2818 tls_securetransport_protocol_deps="securetransport"
2819 tls_securetransport_protocol_select="tcp_protocol"
2820 tls_protocol_deps_any="tls_schannel_protocol tls_securetransport_protocol tls_gnutls_protocol tls_openssl_protocol"
2821 udp_protocol_select="network"
2822 udplite_protocol_select="network"
2823 unix_protocol_deps="sys_un_h"
2824 unix_protocol_select="network"
2825
2826 # filters
2827 aemphasis_filter_deps="cabs cexp"
2828 amovie_filter_deps="avcodec avformat"
2829 aresample_filter_deps="swresample"
2830 ass_filter_deps="libass"
2831 asyncts_filter_deps="avresample"
2832 atempo_filter_deps="avcodec"
2833 atempo_filter_select="rdft"
2834 azmq_filter_deps="libzmq"
2835 blackframe_filter_deps="gpl"
2836 boxblur_filter_deps="gpl"
2837 bs2b_filter_deps="libbs2b"
2838 colormatrix_filter_deps="gpl"
2839 cover_rect_filter_deps="avcodec avformat gpl"
2840 cropdetect_filter_deps="gpl"
2841 delogo_filter_deps="gpl"
2842 deshake_filter_select="pixelutils"
2843 drawtext_filter_deps="libfreetype"
2844 dynaudnorm_filter_deps="copysign erf"
2845 ebur128_filter_deps="gpl"
2846 eq_filter_deps="gpl"
2847 fftfilt_filter_deps="avcodec"
2848 fftfilt_filter_select="rdft"
2849 flite_filter_deps="libflite"
2850 find_rect_filter_deps="avcodec avformat gpl"
2851 frei0r_filter_deps="frei0r dlopen"
2852 frei0r_src_filter_deps="frei0r dlopen"
2853 fspp_filter_deps="gpl"
2854 geq_filter_deps="gpl"
2855 histeq_filter_deps="gpl"
2856 hqdn3d_filter_deps="gpl"
2857 interlace_filter_deps="gpl"
2858 kerndeint_filter_deps="gpl"
2859 ladspa_filter_deps="ladspa dlopen"
2860 mcdeint_filter_deps="avcodec gpl"
2861 movie_filter_deps="avcodec avformat"
2862 mpdecimate_filter_deps="gpl"
2863 mpdecimate_filter_select="pixelutils"
2864 mptestsrc_filter_deps="gpl"
2865 negate_filter_deps="lut_filter"
2866 perspective_filter_deps="gpl"
2867 pp7_filter_deps="gpl"
2868 ocr_filter_deps="libtesseract"
2869 ocv_filter_deps="libopencv"
2870 owdenoise_filter_deps="gpl"
2871 pan_filter_deps="swresample"
2872 phase_filter_deps="gpl"
2873 pp_filter_deps="gpl postproc"
2874 pullup_filter_deps="gpl"
2875 removelogo_filter_deps="avcodec avformat swscale"
2876 repeatfields_filter_deps="gpl"
2877 resample_filter_deps="avresample"
2878 rubberband_filter_deps="librubberband"
2879 sab_filter_deps="gpl swscale"
2880 scale_filter_deps="swscale"
2881 scale2ref_filter_deps="swscale"
2882 select_filter_select="pixelutils"
2883 smartblur_filter_deps="gpl swscale"
2884 showcqt_filter_deps="avcodec avformat swscale"
2885 showcqt_filter_select="fft"
2886 showfreqs_filter_deps="avcodec"
2887 showfreqs_filter_select="fft"
2888 showspectrum_filter_deps="avcodec"
2889 showspectrum_filter_select="rdft"
2890 spp_filter_deps="gpl avcodec"
2891 spp_filter_select="fft idctdsp fdctdsp me_cmp pixblockdsp"
2892 stereo3d_filter_deps="gpl"
2893 subtitles_filter_deps="avformat avcodec libass"
2894 super2xsai_filter_deps="gpl"
2895 tinterlace_filter_deps="gpl"
2896 vidstabdetect_filter_deps="libvidstab"
2897 vidstabtransform_filter_deps="libvidstab"
2898 pixfmts_super2xsai_test_deps="super2xsai_filter"
2899 tinterlace_merge_test_deps="tinterlace_filter"
2900 tinterlace_pad_test_deps="tinterlace_filter"
2901 uspp_filter_deps="gpl avcodec"
2902 zmq_filter_deps="libzmq"
2903 zoompan_filter_deps="swscale"
2904 zscale_filter_deps="libzimg"
2905
2906 # examples
2907 avio_reading="avformat avcodec avutil"
2908 avio_dir_cmd="avformat avutil"
2909 avcodec_example_deps="avcodec avutil"
2910 decoding_encoding_example_deps="avcodec avformat avutil"
2911 demuxing_decoding_example_deps="avcodec avformat avutil"
2912 extract_mvs_example_deps="avcodec avformat avutil"
2913 filter_audio_example_deps="avfilter avutil"
2914 filtering_audio_example_deps="avfilter avcodec avformat avutil"
2915 filtering_video_example_deps="avfilter avcodec avformat avutil"
2916 metadata_example_deps="avformat avutil"
2917 muxing_example_deps="avcodec avformat avutil swscale"
2918 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder vaapi_x11"
2919 remuxing_example_deps="avcodec avformat avutil"
2920 resampling_audio_example_deps="avutil swresample"
2921 scaling_video_example_deps="avutil swscale"
2922 transcode_aac_example_deps="avcodec avformat swresample"
2923 transcoding_example_deps="avfilter avcodec avformat avutil"
2924
2925 # libraries, in linking order
2926 avcodec_deps="avutil"
2927 avdevice_deps="avformat avcodec avutil"
2928 avfilter_deps="avutil"
2929 avformat_deps="avcodec avutil"
2930 avresample_deps="avutil"
2931 postproc_deps="avutil gpl"
2932 swresample_deps="avutil"
2933 swscale_deps="avutil"
2934
2935 # programs
2936 ffmpeg_deps="avcodec avfilter avformat swresample"
2937 ffmpeg_select="aformat_filter anull_filter atrim_filter format_filter
2938                null_filter
2939                setpts_filter trim_filter"
2940 ffplay_deps="avcodec avformat swscale swresample sdl"
2941 ffplay_libs='$sdl_libs'
2942 ffplay_select="rdft crop_filter transpose_filter hflip_filter vflip_filter rotate_filter"
2943 ffprobe_deps="avcodec avformat"
2944 ffserver_deps="avformat fork sarestart"
2945 ffserver_select="ffm_muxer rtp_protocol rtsp_demuxer"
2946
2947 # documentation
2948 podpages_deps="perl"
2949 manpages_deps="perl pod2man"
2950 htmlpages_deps="perl"
2951 htmlpages_deps_any="makeinfo_html texi2html"
2952 txtpages_deps="perl makeinfo"
2953 doc_deps_any="manpages htmlpages podpages txtpages"
2954
2955 # default parameters
2956
2957 logfile="config.log"
2958
2959 # installation paths
2960 prefix_default="/usr/local"
2961 bindir_default='${prefix}/bin'
2962 datadir_default='${prefix}/share/ffmpeg'
2963 docdir_default='${prefix}/share/doc/ffmpeg'
2964 incdir_default='${prefix}/include'
2965 libdir_default='${prefix}/lib'
2966 mandir_default='${prefix}/share/man'
2967
2968 # toolchain
2969 ar_default="ar"
2970 cc_default="gcc"
2971 cxx_default="g++"
2972 host_cc_default="gcc"
2973 cp_f="cp -f"
2974 doxygen_default="doxygen"
2975 install="install"
2976 ln_s="ln -s -f"
2977 nm_default="nm -g"
2978 objformat="elf"
2979 pkg_config_default=pkg-config
2980 ranlib_default="ranlib"
2981 strip_default="strip"
2982 yasmexe_default="yasm"
2983 windres_default="windres"
2984
2985 # OS
2986 target_os_default=$(tolower $(uname -s))
2987 host_os=$target_os_default
2988
2989 # machine
2990 if test "$target_os_default" = aix; then
2991     arch_default=$(uname -p)
2992     strip_default="strip -X32_64"
2993 else
2994     arch_default=$(uname -m)
2995 fi
2996 cpu="generic"
2997 intrinsics="none"
2998
2999 # configurable options
3000 enable $PROGRAM_LIST
3001 enable $DOCUMENT_LIST
3002 enable $EXAMPLE_LIST
3003 enable $(filter_out avresample $LIBRARY_LIST)
3004 enable stripping
3005
3006 enable asm
3007 enable debug
3008 enable doc
3009 enable faan faandct faanidct
3010 enable optimizations
3011 enable runtime_cpudetect
3012 enable safe_bitstream_reader
3013 enable static
3014 enable swscale_alpha
3015 enable valgrind_backtrace
3016
3017 sws_max_filter_size_default=256
3018 set_default sws_max_filter_size
3019
3020 # Enable hwaccels by default.
3021 enable d3d11va dxva2 vaapi vda vdpau videotoolbox xvmc
3022 enable xlib
3023
3024 # build settings
3025 SHFLAGS='-shared -Wl,-soname,$$(@F)'
3026 LIBPREF="lib"
3027 LIBSUF=".a"
3028 FULLNAME='$(NAME)$(BUILDSUF)'
3029 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
3030 SLIBPREF="lib"
3031 SLIBSUF=".so"
3032 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
3033 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
3034 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
3035 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
3036 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
3037 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
3038
3039 asflags_filter=echo
3040 cflags_filter=echo
3041 ldflags_filter=echo
3042
3043 AS_C='-c'
3044 AS_O='-o $@'
3045 CC_C='-c'
3046 CC_E='-E -o $@'
3047 CC_O='-o $@'
3048 CXX_C='-c'
3049 CXX_O='-o $@'
3050 OBJCC_C='-c'
3051 OBJCC_E='-E -o $@'
3052 OBJCC_O='-o $@'
3053 LD_O='-o $@'
3054 LD_LIB='-l%'
3055 LD_PATH='-L'
3056 HOSTCC_C='-c'
3057 HOSTCC_E='-E -o $@'
3058 HOSTCC_O='-o $@'
3059 HOSTLD_O='-o $@'
3060
3061 host_libs='-lm'
3062 host_cflags_filter=echo
3063 host_ldflags_filter=echo
3064
3065 target_path='$(CURDIR)'
3066
3067 # since the object filename is not given with the -MM flag, the compiler
3068 # is only able to print the basename, and we must add the path ourselves
3069 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>/dev/null | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(@F),$(@D)/$(@F)," > $(@:.o=.d)'
3070 DEPFLAGS='-MM'
3071
3072 # find source path
3073 if test -f configure; then
3074     source_path=.
3075 else
3076     source_path=$(cd $(dirname "$0"); pwd)
3077     case "$source_path" in
3078         *[[:blank:]]*) die "Out of tree builds are impossible with whitespace in source path." ;;
3079     esac
3080     test -e "$source_path/config.h" &&
3081         die "Out of tree builds are impossible with config.h in source dir."
3082 fi
3083
3084 for v in "$@"; do
3085     r=${v#*=}
3086     l=${v%"$r"}
3087     r=$(sh_quote "$r")
3088     FFMPEG_CONFIGURATION="${FFMPEG_CONFIGURATION# } ${l}${r}"
3089 done
3090
3091 find_things(){
3092     thing=$1
3093     pattern=$2
3094     file=$source_path/$3
3095     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
3096 }
3097
3098 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
3099 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
3100 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
3101 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
3102 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
3103 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
3104 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
3105 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
3106 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
3107 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
3108 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
3109
3110 ALL_COMPONENTS="
3111     $BSF_LIST
3112     $DECODER_LIST
3113     $DEMUXER_LIST
3114     $ENCODER_LIST
3115     $FILTER_LIST
3116     $HWACCEL_LIST
3117     $INDEV_LIST
3118     $MUXER_LIST
3119     $OUTDEV_LIST
3120     $PARSER_LIST
3121     $PROTOCOL_LIST
3122 "
3123
3124 for n in $COMPONENT_LIST; do
3125     v=$(toupper ${n%s})_LIST
3126     eval enable \$$v
3127     eval ${n}_if_any="\$$v"
3128 done
3129
3130 enable $ARCH_EXT_LIST
3131
3132 die_unknown(){
3133     echo "Unknown option \"$1\"."
3134     echo "See $0 --help for available options."
3135     exit 1
3136 }
3137
3138 print_in_columns() {
3139     cols=$(expr $ncols / 24)
3140     cat | tr ' ' '\n' | sort | pr -r "-$cols" -w $ncols -t
3141 }
3142
3143 show_list() {
3144     suffix=_$1
3145     shift
3146     echo $* | sed s/$suffix//g | print_in_columns
3147     exit 0
3148 }
3149
3150 rand_list(){
3151     IFS=', '
3152     set -- $*
3153     unset IFS
3154     for thing; do
3155         comp=${thing%:*}
3156         prob=${thing#$comp}
3157         prob=${prob#:}
3158         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
3159         echo "prob ${prob:-0.5}"
3160         printf '%s\n' $comp
3161     done
3162 }
3163
3164 do_random(){
3165     action=$1
3166     shift
3167     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
3168     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
3169 }
3170
3171 for opt do
3172     optval="${opt#*=}"
3173     case "$opt" in
3174         --extra-ldflags=*)
3175             add_ldflags $optval
3176         ;;
3177         --extra-ldexeflags=*)
3178             add_ldexeflags $optval
3179         ;;
3180         --extra-ldlibflags=*)
3181             add_ldlibflags $optval
3182         ;;
3183         --extra-libs=*)
3184             add_extralibs $optval
3185         ;;
3186         --disable-devices)
3187             disable $INDEV_LIST $OUTDEV_LIST
3188         ;;
3189         --enable-debug=*)
3190             debuglevel="$optval"
3191         ;;
3192         --disable-programs)
3193             disable $PROGRAM_LIST
3194         ;;
3195         --disable-everything)
3196             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
3197         ;;
3198         --disable-all)
3199             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
3200             disable $LIBRARY_LIST $PROGRAM_LIST doc
3201             enable avutil
3202         ;;
3203         --enable-random|--disable-random)
3204             action=${opt%%-random}
3205             do_random ${action#--} $COMPONENT_LIST
3206         ;;
3207         --enable-random=*|--disable-random=*)
3208             action=${opt%%-random=*}
3209             do_random ${action#--} $optval
3210         ;;
3211         --enable-*=*|--disable-*=*)
3212             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
3213             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
3214             eval list=\$$(toupper $thing)_LIST
3215             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
3216             list=$(filter "$name" $list)
3217             [ "$list" = "" ] && warn "Option $opt did not match anything"
3218             $action $list
3219         ;;
3220         --enable-?*|--disable-?*)
3221             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
3222             if is_in $option $COMPONENT_LIST; then
3223                 test $action = disable && action=unset
3224                 eval $action \$$(toupper ${option%s})_LIST
3225             elif is_in $option $CMDLINE_SELECT; then
3226                 $action $option
3227             else
3228                 die_unknown $opt
3229             fi
3230         ;;
3231         --list-*)
3232             NAME="${opt#--list-}"
3233             is_in $NAME $COMPONENT_LIST || die_unknown $opt
3234             NAME=${NAME%s}
3235             eval show_list $NAME \$$(toupper $NAME)_LIST
3236         ;;
3237         --help|-h) show_help
3238         ;;
3239         --fatal-warnings) enable fatal_warnings
3240         ;;
3241         *)
3242             optname="${opt%%=*}"
3243             optname="${optname#--}"
3244             optname=$(echo "$optname" | sed 's/-/_/g')
3245             if is_in $optname $CMDLINE_SET; then
3246                 eval $optname='$optval'
3247             elif is_in $optname $CMDLINE_APPEND; then
3248                 append $optname "$optval"
3249             else
3250                 die_unknown $opt
3251             fi
3252         ;;
3253     esac
3254 done
3255
3256 for e in $env; do
3257     eval "export $e"
3258 done
3259
3260 disabled logging && logfile=/dev/null
3261
3262 # Disable all the library-specific components if the library itself
3263 # is disabled, see AVCODEC_LIST and following _LIST variables.
3264
3265 disable_components(){
3266     disabled ${1} && disable $(
3267         eval components="\$$(toupper ${1})_COMPONENTS"
3268         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
3269     )
3270 }
3271
3272 map 'disable_components $v' $LIBRARY_LIST
3273
3274 echo "# $0 $FFMPEG_CONFIGURATION" > $logfile
3275 set >> $logfile
3276
3277 test -n "$valgrind" && toolchain="valgrind-memcheck"
3278
3279 case "$toolchain" in
3280     clang-asan)
3281         cc_default="clang"
3282         add_cflags  -fsanitize=address
3283         add_ldflags -fsanitize=address
3284     ;;
3285     clang-tsan)
3286         cc_default="clang"
3287         add_cflags  -fsanitize=thread -pie
3288         add_ldflags -fsanitize=thread -pie
3289     ;;
3290     clang-usan)
3291         cc_default="clang"
3292         add_cflags  -fsanitize=undefined
3293         add_ldflags -fsanitize=undefined
3294     ;;
3295     gcc-asan)
3296         cc_default="gcc"
3297         add_cflags  -fsanitize=address
3298         add_ldflags -fsanitize=address
3299     ;;
3300     gcc-tsan)
3301         cc_default="gcc"
3302         add_cflags  -fsanitize=thread -pie -fPIC
3303         add_ldflags -fsanitize=thread -pie -fPIC
3304     ;;
3305     gcc-usan)
3306         cc_default="gcc"
3307         add_cflags  -fsanitize=undefined
3308         add_ldflags -fsanitize=undefined
3309     ;;
3310     valgrind-massif)
3311         target_exec_default=${valgrind:-"valgrind"}
3312         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"
3313     ;;
3314     valgrind-memcheck)
3315         target_exec_default=${valgrind:-"valgrind"}
3316         target_exec_args="--error-exitcode=1 --malloc-fill=0x2a --track-origins=yes --leak-check=full --gen-suppressions=all --suppressions=$source_path/tests/fate-valgrind.supp"
3317     ;;
3318     msvc)
3319         # Check whether the current MSVC version needs the C99 converter.
3320         # From MSVC 2013 (compiler major version 18) onwards, it does actually
3321         # support enough of C99 to build ffmpeg. Default to the new
3322         # behaviour if the regexp was unable to match anything, since this
3323         # successfully parses the version number of existing supported
3324         # versions that require the converter (MSVC 2010 and 2012).
3325         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
3326         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
3327             cc_default="cl"
3328         else
3329             cc_default="c99wrap cl"
3330         fi
3331         ld_default="$source_path/compat/windows/mslink"
3332         nm_default="dumpbin -symbols"
3333         ar_default="lib"
3334         case "$arch" in
3335         arm*)
3336             as_default="armasm"
3337             ;;
3338         esac
3339         target_os_default="win32"
3340         # Use a relative path for TMPDIR. This makes sure all the
3341         # ffconf temp files are written with a relative path, avoiding
3342         # issues with msys/win32 path conversion for MSVC parameters
3343         # such as -Fo<file> or -out:<file>.
3344         TMPDIR=.
3345     ;;
3346     icl)
3347         cc_default="icl"
3348         ld_default="xilink"
3349         nm_default="dumpbin -symbols"
3350         ar_default="xilib"
3351         target_os_default="win32"
3352         TMPDIR=.
3353     ;;
3354     gcov)
3355         add_cflags  -fprofile-arcs -ftest-coverage
3356         add_ldflags -fprofile-arcs -ftest-coverage
3357     ;;
3358     hardened)
3359         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
3360         add_cflags   -fno-strict-overflow -fstack-protector-all
3361         add_ldflags  -Wl,-z,relro -Wl,-z,now
3362     ;;
3363     ?*)
3364         die "Unknown toolchain $toolchain"
3365     ;;
3366 esac
3367
3368 test -n "$cross_prefix" && enable cross_compile
3369
3370 if enabled cross_compile; then
3371     test -n "$arch" && test -n "$target_os" ||
3372         die "Must specify target arch and OS when cross-compiling"
3373 fi
3374
3375 ar_default="${cross_prefix}${ar_default}"
3376 cc_default="${cross_prefix}${cc_default}"
3377 cxx_default="${cross_prefix}${cxx_default}"
3378 nm_default="${cross_prefix}${nm_default}"
3379 pkg_config_default="${cross_prefix}${pkg_config_default}"
3380 if ${cross_prefix}${ranlib_default} 2>&1 | grep -q "\-D "; then
3381     ranlib_default="${cross_prefix}${ranlib_default} -D"
3382 else
3383     ranlib_default="${cross_prefix}${ranlib_default}"
3384 fi
3385 strip_default="${cross_prefix}${strip_default}"
3386 windres_default="${cross_prefix}${windres_default}"
3387
3388 sysinclude_default="${sysroot}/usr/include"
3389
3390 set_default arch cc cxx doxygen pkg_config ranlib strip sysinclude \
3391     target_exec target_os yasmexe
3392 enabled cross_compile || host_cc_default=$cc
3393 set_default host_cc
3394
3395 pkg_config_fail_message=""
3396 if ! $pkg_config --version >/dev/null 2>&1; then
3397     warn "$pkg_config not found, library detection may fail."
3398     pkg_config=false
3399 elif is_in -static $cc $LDFLAGS && ! is_in --static $pkg_config $pkg_config_flags; then
3400     pkg_config_fail_message="
3401 Note: When building a static binary, add --pkg-config-flags=\"--static\"."
3402 fi
3403
3404 if test $doxygen != $doxygen_default && \
3405   ! $doxygen --version >/dev/null 2>&1; then
3406     warn "Specified doxygen \"$doxygen\" not found, API documentation will fail to build."
3407 fi
3408
3409 exesuf() {
3410     case $1 in
3411         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
3412     esac
3413 }
3414
3415 EXESUF=$(exesuf $target_os)
3416 HOSTEXESUF=$(exesuf $host_os)
3417
3418 # set temporary file name
3419 : ${TMPDIR:=$TEMPDIR}
3420 : ${TMPDIR:=$TMP}
3421 : ${TMPDIR:=/tmp}
3422
3423 if [ -n "$tempprefix" ] ; then
3424     mktemp(){
3425         echo $tempprefix.${HOSTNAME}.${UID}
3426     }
3427 elif ! check_cmd mktemp -u XXXXXX; then
3428     # simple replacement for missing mktemp
3429     # NOT SAFE FOR GENERAL USE
3430     mktemp(){
3431         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
3432     }
3433 fi
3434
3435 tmpfile(){
3436     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
3437         (set -C; exec > $tmp) 2>/dev/null ||
3438         die "Unable to create temporary file in $TMPDIR."
3439     append TMPFILES $tmp
3440     eval $1=$tmp
3441 }
3442
3443 trap 'rm -f -- $TMPFILES' EXIT
3444
3445 tmpfile TMPASM .asm
3446 tmpfile TMPC   .c
3447 tmpfile TMPCPP .cpp
3448 tmpfile TMPE   $EXESUF
3449 tmpfile TMPH   .h
3450 tmpfile TMPM   .m
3451 tmpfile TMPO   .o
3452 tmpfile TMPS   .S
3453 tmpfile TMPSH  .sh
3454 tmpfile TMPV   .ver
3455
3456 unset -f mktemp
3457
3458 chmod +x $TMPE
3459
3460 # make sure we can execute files in $TMPDIR
3461 cat > $TMPSH 2>> $logfile <<EOF
3462 #! /bin/sh
3463 EOF
3464 chmod +x $TMPSH >> $logfile 2>&1
3465 if ! $TMPSH >> $logfile 2>&1; then
3466     cat <<EOF
3467 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
3468 variable to another directory and make sure that it is not mounted noexec.
3469 EOF
3470     die "Sanity test failed."
3471 fi
3472
3473 armasm_flags(){
3474     for flag; do
3475         case $flag in
3476             # Filter out MSVC cl.exe options from cflags that shouldn't
3477             # be passed to gas-preprocessor
3478             -M[TD]*)                                            ;;
3479             *)                  echo $flag                      ;;
3480         esac
3481    done
3482 }
3483
3484 ccc_flags(){
3485     for flag; do
3486         case $flag in
3487             -std=c99)           echo -c99                       ;;
3488             -mcpu=*)            echo -arch ${flag#*=}           ;;
3489             -mieee)             echo -ieee                      ;;
3490             -O*|-fast)          echo $flag                      ;;
3491             -fno-math-errno)    echo -assume nomath_errno       ;;
3492             -g)                 echo -g3                        ;;
3493             -Wall)              echo -msg_enable level2         ;;
3494             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
3495             -Wl,*)              echo $flag                      ;;
3496             -f*|-W*)                                            ;;
3497             *)                  echo $flag                      ;;
3498         esac
3499    done
3500 }
3501
3502 cparser_flags(){
3503     for flag; do
3504         case $flag in
3505             -Wno-switch)             echo -Wno-switch-enum ;;
3506             -Wno-format-zero-length) ;;
3507             -Wdisabled-optimization) ;;
3508             -Wno-pointer-sign)       echo -Wno-other ;;
3509             *)                       echo $flag ;;
3510         esac
3511     done
3512 }
3513
3514 msvc_common_flags(){
3515     for flag; do
3516         case $flag in
3517             # In addition to specifying certain flags under the compiler
3518             # specific filters, they must be specified here as well or else the
3519             # generic catch all at the bottom will print the original flag.
3520             -Wall)                ;;
3521             -std=c99)             ;;
3522             # Common flags
3523             -fomit-frame-pointer) ;;
3524             -g)                   echo -Z7 ;;
3525             -fno-math-errno)      ;;
3526             -fno-common)          ;;
3527             -fno-signed-zeros)    ;;
3528             -fPIC)                ;;
3529             -mthumb)              ;;
3530             -march=*)             ;;
3531             -lz)                  echo zlib.lib ;;
3532             -lavifil32)           echo vfw32.lib ;;
3533             -lavicap32)           echo vfw32.lib user32.lib ;;
3534             -l*)                  echo ${flag#-l}.lib ;;
3535             -LARGEADDRESSAWARE)   echo $flag ;;
3536             -L*)                  echo -libpath:${flag#-L} ;;
3537             *)                    echo $flag ;;
3538         esac
3539     done
3540 }
3541
3542 msvc_flags(){
3543     msvc_common_flags "$@"
3544     for flag; do
3545         case $flag in
3546             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3547                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3548                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3549                                        -wd4307 \
3550                                        -wd4273 -wd4554 -wd4701 ;;
3551         esac
3552     done
3553 }
3554
3555 icl_flags(){
3556     msvc_common_flags "$@"
3557     for flag; do
3558         case $flag in
3559             # Despite what Intel's documentation says -Wall, which is supported
3560             # on Windows, does enable remarks so disable them here.
3561             -Wall)                echo $flag -Qdiag-disable:remark ;;
3562             -std=c99)             echo -Qstd=c99 ;;
3563             -flto)                echo -ipo ;;
3564         esac
3565     done
3566 }
3567
3568 icc_flags(){
3569     for flag; do
3570         case $flag in
3571             -flto)                echo -ipo ;;
3572             *)                    echo $flag ;;
3573         esac
3574     done
3575 }
3576
3577 pgi_flags(){
3578     for flag; do
3579         case $flag in
3580             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3581             -fomit-frame-pointer) echo -Mnoframe ;;
3582             -g)                   echo -gopt ;;
3583             *)                    echo $flag ;;
3584         esac
3585     done
3586 }
3587
3588 suncc_flags(){
3589     for flag; do
3590         case $flag in
3591             -march=*|-mcpu=*)
3592                 case "${flag#*=}" in
3593                     native)                   echo -xtarget=native       ;;
3594                     v9|niagara)               echo -xarch=sparc          ;;
3595                     ultrasparc)               echo -xarch=sparcvis       ;;
3596                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3597                     i586|pentium)             echo -xchip=pentium        ;;
3598                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3599                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3600                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3601                     pentium4*)          echo -xtarget=pentium4           ;;
3602                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3603                     *-sse3)             echo -xarch=sse3                 ;;
3604                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3605                     bonnell)                   echo -xarch=ssse3         ;;
3606                     corei7|nehalem)            echo -xtarget=nehalem     ;;
3607                     westmere)                  echo -xtarget=westmere    ;;
3608                     silvermont)                echo -xarch=sse4_2        ;;
3609                     corei7-avx|sandybridge)    echo -xtarget=sandybridge ;;
3610                     core-avx*|ivybridge|haswell|broadwell)
3611                                                echo -xarch=avx           ;;
3612                     amdfam10|barcelona)        echo -xtarget=barcelona   ;;
3613                     btver1)                    echo -xarch=amdsse4a      ;;
3614                     btver2|bdver*)             echo -xarch=avx           ;;
3615                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3616                     k8|opteron|athlon64|athlon-fx)
3617                                                echo -xarch=sse2a         ;;
3618                     athlon*)                   echo -xarch=pentium_proa  ;;
3619                 esac
3620                 ;;
3621             -std=c99)             echo -xc99              ;;
3622             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3623             -fPIC)                echo -KPIC -xcode=pic32 ;;
3624             -W*,*)                echo $flag              ;;
3625             -f*-*|-W*|-mimpure-text)                      ;;
3626             -shared)              echo -G                 ;;
3627             *)                    echo $flag              ;;
3628         esac
3629     done
3630 }
3631
3632 tms470_flags(){
3633     for flag; do
3634         case $flag in
3635             -march=*|-mcpu=*)
3636                 case "${flag#*=}" in
3637                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3638                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3639                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3640                     armv6*|arm11*)          echo -mv=6   ;;
3641                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3642                                             echo -mv=5e  ;;
3643                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3644                 esac
3645                 ;;
3646             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3647             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3648             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3649             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3650             -msoft-float)   echo --float_support=vfplib       ;;
3651             -O[0-3]|-mf=*)  echo $flag                        ;;
3652             -g)             echo -g -mn                       ;;
3653             -pds=*)         echo $flag                        ;;
3654             -D*|-I*)        echo $flag                        ;;
3655             --gcc|--abi=*)  echo $flag                        ;;
3656             -me)            echo $flag                        ;;
3657         esac
3658     done
3659 }
3660
3661 probe_cc(){
3662     pfx=$1
3663     _cc=$2
3664     first=$3
3665
3666     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3667     unset _ld_o _ldflags _ld_lib _ld_path
3668     unset _depflags _DEPCMD _DEPFLAGS
3669     _flags_filter=echo
3670
3671     if $_cc --version 2>&1 | grep -q '^GNU assembler'; then
3672         true # no-op to avoid reading stdin in following checks
3673     elif $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3674         _type=llvm_gcc
3675         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3676         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3677         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3678         _cflags_speed='-O3'
3679         _cflags_size='-Os'
3680     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3681         _type=gcc
3682         gcc_version=$($_cc --version | head -n1)
3683         gcc_basever=$($_cc -dumpversion)
3684         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3685         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3686         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3687         case $gcc_basever in
3688             2*) ;;
3689             *) _depflags='-MMD -MF $(@:.o=.d) -MT $@' ;;
3690         esac
3691         if [ "$first" = true ]; then
3692             case $gcc_basever in
3693                 4.2*)
3694                 warn "gcc 4.2 is outdated and may miscompile FFmpeg. Please use a newer compiler." ;;
3695             esac
3696         fi
3697         _cflags_speed='-O3'
3698         _cflags_size='-Os'
3699     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3700         _type=icc
3701         _ident=$($_cc --version | head -n1)
3702         _depflags='-MMD'
3703         _cflags_speed='-O3'
3704         _cflags_size='-Os'
3705         _cflags_noopt='-O1'
3706         _flags_filter=icc_flags
3707     elif $_cc -v 2>&1 | grep -q xlc; then
3708         _type=xlc
3709         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3710         _cflags_speed='-O5'
3711         _cflags_size='-O5 -qcompact'
3712     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3713         _type=ccc
3714         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3715         _DEPFLAGS='-M'
3716         _cflags_speed='-fast'
3717         _cflags_size='-O1'
3718         _flags_filter=ccc_flags
3719     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3720         test -d "$sysroot" || die "No valid sysroot specified."
3721         _type=armcc
3722         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3723         armcc_conf="$PWD/armcc.conf"
3724         $_cc --arm_linux_configure                 \
3725              --arm_linux_config_file="$armcc_conf" \
3726              --configure_sysroot="$sysroot"        \
3727              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3728              die "Error creating armcc configuration file."
3729         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3730         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3731         as_default="${cross_prefix}gcc"
3732         _depflags='-MMD'
3733         _cflags_speed='-O3'
3734         _cflags_size='-Os'
3735     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3736         _type=tms470
3737         _ident=$($_cc -version | head -n1 | tr -s ' ')
3738         _flags='--gcc --abi=eabi -me'
3739         _cc_e='-ppl -fe=$@'
3740         _cc_o='-fe=$@'
3741         _depflags='-ppa -ppd=$(@:.o=.d)'
3742         _cflags_speed='-O3 -mf=5'
3743         _cflags_size='-O3 -mf=2'
3744         _flags_filter=tms470_flags
3745     elif $_cc -v 2>&1 | grep -q clang; then
3746         _type=clang
3747         _ident=$($_cc --version 2>/dev/null | head -n1)
3748         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3749         _cflags_speed='-O3'
3750         _cflags_size='-Os'
3751     elif $_cc -V 2>&1 | grep -q Sun; then
3752         _type=suncc
3753         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3754         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3755         _DEPFLAGS='-xM1 -xc99'
3756         _ldflags='-std=c99'
3757         _cflags_speed='-O5'
3758         _cflags_size='-O5 -xspace'
3759         _flags_filter=suncc_flags
3760     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3761         _type=pathscale
3762         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3763         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3764         _cflags_speed='-O2'
3765         _cflags_size='-Os'
3766         _flags_filter='filter_out -Wdisabled-optimization'
3767     elif $_cc -v 2>&1 | grep -q Open64; then
3768         _type=open64
3769         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3770         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3771         _cflags_speed='-O2'
3772         _cflags_size='-Os'
3773         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3774     elif $_cc -V 2>&1 | grep -q Portland; then
3775         _type=pgi
3776         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3777         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3778         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3779         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3780         _cflags_noopt="-O"
3781         _flags_filter=pgi_flags
3782     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3783         _type=armasm
3784         _ident=$($_cc | head -n1)
3785         # 4509: "This form of conditional instruction is deprecated"
3786         _flags="-nologo -ignore 4509"
3787         _flags_filter=armasm_flags
3788     elif $_cc 2>&1 | grep -q Intel; then
3789         _type=icl
3790         _ident=$($_cc 2>&1 | head -n1)
3791         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3792         # Not only is O3 broken on 13.x+ but it is slower on all previous
3793         # versions (tested) as well.
3794         _cflags_speed="-O2"
3795         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3796         if $_cc 2>&1 | grep -q Linker; then
3797             _ld_o='-out:$@'
3798         else
3799             _ld_o='-Fe$@'
3800         fi
3801         _cc_o='-Fo$@'
3802         _cc_e='-P'
3803         _flags_filter=icl_flags
3804         _ld_lib='lib%.a'
3805         _ld_path='-libpath:'
3806         # -Qdiag-error to make icl error when seeing certain unknown arguments
3807         _flags='-nologo -Qdiag-error:4044,10157'
3808         # -Qvec- -Qsimd- to prevent miscompilation, -GS, fp:precise for consistency
3809         # with MSVC which enables it by default.
3810         _cflags='-D_USE_MATH_DEFINES -Qms0 -Qvec- -Qsimd- -GS -fp:precise'
3811         disable stripping
3812     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3813         _type=msvc
3814         _ident=$($_cc 2>&1 | head -n1)
3815         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3816         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3817         _cflags_speed="-O2"
3818         _cflags_size="-O1"
3819         if $_cc -nologo- 2>&1 | grep -q Linker; then
3820             _ld_o='-out:$@'
3821         else
3822             _ld_o='-Fe$@'
3823         fi
3824         _cc_o='-Fo$@'
3825         _cc_e='-P -Fi$@'
3826         _flags_filter=msvc_flags
3827         _ld_lib='lib%.a'
3828         _ld_path='-libpath:'
3829         _flags='-nologo'
3830         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS'
3831         disable stripping
3832     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3833         _type=cparser
3834         _ident=$($_cc --version | head -n1)
3835         _depflags='-MMD'
3836         _cflags_speed='-O4'
3837         _cflags_size='-O2'
3838         _flags_filter=cparser_flags
3839     fi
3840
3841     eval ${pfx}_type=\$_type
3842     eval ${pfx}_ident=\$_ident
3843 }
3844
3845 set_ccvars(){
3846     eval ${1}_C=\${_cc_c-\${${1}_C}}
3847     eval ${1}_E=\${_cc_e-\${${1}_E}}
3848     eval ${1}_O=\${_cc_o-\${${1}_O}}
3849
3850     if [ -n "$_depflags" ]; then
3851         eval ${1}_DEPFLAGS=\$_depflags
3852     else
3853         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3854         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3855         eval DEP${1}FLAGS=\$_flags
3856     fi
3857 }
3858
3859 probe_cc cc "$cc" "true"
3860 cflags_filter=$_flags_filter
3861 cflags_speed=$_cflags_speed
3862 cflags_size=$_cflags_size
3863 cflags_noopt=$_cflags_noopt
3864 add_cflags $_flags $_cflags
3865 cc_ldflags=$_ldflags
3866 set_ccvars CC
3867
3868 probe_cc hostcc "$host_cc"
3869 host_cflags_filter=$_flags_filter
3870 add_host_cflags  $_flags $_cflags
3871 set_ccvars HOSTCC
3872
3873 test -n "$cc_type" && enable $cc_type ||
3874     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3875
3876 : ${as_default:=$cc}
3877 : ${objcc_default:=$cc}
3878 : ${dep_cc_default:=$cc}
3879 : ${ld_default:=$cc}
3880 : ${host_ld_default:=$host_cc}
3881 set_default ar as objcc dep_cc ld host_ld windres
3882
3883 probe_cc as "$as"
3884 asflags_filter=$_flags_filter
3885 add_asflags $_flags $_cflags
3886 set_ccvars AS
3887
3888 probe_cc objcc "$objcc"
3889 objcflags_filter=$_flags_filter
3890 add_objcflags $_flags $_cflags
3891 set_ccvars OBJC
3892
3893 probe_cc ld "$ld"
3894 ldflags_filter=$_flags_filter
3895 add_ldflags $_flags $_ldflags
3896 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3897 LD_O=${_ld_o-$LD_O}
3898 LD_LIB=${_ld_lib-$LD_LIB}
3899 LD_PATH=${_ld_path-$LD_PATH}
3900
3901 probe_cc hostld "$host_ld"
3902 host_ldflags_filter=$_flags_filter
3903 add_host_ldflags $_flags $_ldflags
3904 HOSTLD_O=${_ld_o-$HOSTLD_O}
3905
3906 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3907     probe_cc depcc "$dep_cc"
3908     CCDEP=${_DEPCMD:-$DEPCMD}
3909     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3910     DEPCCFLAGS=$_flags
3911 fi
3912
3913 if $ar 2>&1 | grep -q Microsoft; then
3914     arflags="-nologo"
3915     ar_o='-out:$@'
3916 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3917     arflags="rq"
3918     ar_o='$@'
3919 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3920     arflags='-Xany -r -c'
3921     ar_o='$@'
3922 elif $ar 2>&1 | grep -q "\[D\] "; then
3923     arflags="rcD"
3924     ar_o='$@'
3925 else
3926     arflags="rc"
3927     ar_o='$@'
3928 fi
3929
3930 add_cflags $extra_cflags
3931 add_cxxflags $extra_cxxflags
3932 add_objcflags $extra_objcflags
3933 add_asflags $extra_cflags
3934
3935 if test -n "$sysroot"; then
3936     case "$cc_type" in
3937         gcc|llvm_gcc|clang)
3938             add_cppflags --sysroot="$sysroot"
3939             add_ldflags --sysroot="$sysroot"
3940 # On Darwin --sysroot may be ignored, -isysroot always affects headers and linking
3941             add_cppflags -isysroot "$sysroot"
3942             add_ldflags -isysroot "$sysroot"
3943         ;;
3944         tms470)
3945             add_cppflags -I"$sysinclude"
3946             add_ldflags  --sysroot="$sysroot"
3947         ;;
3948     esac
3949 fi
3950
3951 if test "$cpu" = host; then
3952     enabled cross_compile &&
3953         die "--cpu=host makes no sense when cross-compiling."
3954
3955     case "$cc_type" in
3956         gcc|llvm_gcc)
3957             check_native(){
3958                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3959                 sed -n "/cc1.*$1=/{
3960                             s/.*$1=\\([^ ]*\\).*/\\1/
3961                             p
3962                             q
3963                         }" $TMPE
3964             }
3965             cpu=$(check_native -march || check_native -mcpu)
3966         ;;
3967     esac
3968
3969     test "${cpu:-host}" = host &&
3970         die "--cpu=host not supported with compiler $cc"
3971 fi
3972
3973 # Deal with common $arch aliases
3974 case "$arch" in
3975     aarch64|arm64)
3976         arch="aarch64"
3977     ;;
3978     arm*|iPad*|iPhone*)
3979         arch="arm"
3980     ;;
3981     mips*|IP*)
3982         arch="mips"
3983     ;;
3984     parisc*|hppa*)
3985         arch="parisc"
3986     ;;
3987     "Power Macintosh"|ppc*|powerpc*)
3988         arch="ppc"
3989     ;;
3990     s390|s390x)
3991         arch="s390"
3992     ;;
3993     sh4|sh)
3994         arch="sh4"
3995     ;;
3996     sun4u|sparc*)
3997         arch="sparc"
3998     ;;
3999     tilegx|tile-gx)
4000         arch="tilegx"
4001     ;;
4002     i[3-6]86*|i86pc|BePC|x86pc|x86_64|x86_32|amd64)
4003         arch="x86"
4004     ;;
4005 esac
4006
4007 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
4008 enable $arch
4009
4010 # Add processor-specific flags
4011 if enabled aarch64; then
4012
4013     case $cpu in
4014         armv*)
4015             cpuflags="-march=$cpu"
4016         ;;
4017         *)
4018             cpuflags="-mcpu=$cpu"
4019         ;;
4020     esac
4021
4022 elif enabled alpha; then
4023
4024     cpuflags="-mcpu=$cpu"
4025
4026 elif enabled arm; then
4027
4028     check_arm_arch() {
4029         check_cpp_condition stddef.h \
4030             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
4031             $cpuflags
4032     }
4033
4034     probe_arm_arch() {
4035         if   check_arm_arch 4;        then echo armv4;
4036         elif check_arm_arch 4T;       then echo armv4t;
4037         elif check_arm_arch 5;        then echo armv5;
4038         elif check_arm_arch 5E;       then echo armv5e;
4039         elif check_arm_arch 5T;       then echo armv5t;
4040         elif check_arm_arch 5TE;      then echo armv5te;
4041         elif check_arm_arch 5TEJ;     then echo armv5te;
4042         elif check_arm_arch 6;        then echo armv6;
4043         elif check_arm_arch 6J;       then echo armv6j;
4044         elif check_arm_arch 6K;       then echo armv6k;
4045         elif check_arm_arch 6Z;       then echo armv6z;
4046         elif check_arm_arch 6ZK;      then echo armv6zk;
4047         elif check_arm_arch 6T2;      then echo armv6t2;
4048         elif check_arm_arch 7;        then echo armv7;
4049         elif check_arm_arch 7A  7_A;  then echo armv7-a;
4050         elif check_arm_arch 7S;       then echo armv7-a;
4051         elif check_arm_arch 7R  7_R;  then echo armv7-r;
4052         elif check_arm_arch 7M  7_M;  then echo armv7-m;
4053         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
4054         elif check_arm_arch 8A  8_A;  then echo armv8-a;
4055         fi
4056     }
4057
4058     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
4059
4060     case $cpu in
4061         armv*)
4062             cpuflags="-march=$cpu"
4063             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
4064         ;;
4065         *)
4066             cpuflags="-mcpu=$cpu"
4067             case $cpu in
4068                 cortex-a*)                               subarch=armv7a  ;;
4069                 cortex-r*)                               subarch=armv7r  ;;
4070                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
4071                 arm11*)                                  subarch=armv6   ;;
4072                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
4073                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
4074                 *)                             subarch=$(probe_arm_arch) ;;
4075             esac
4076         ;;
4077     esac
4078
4079     case "$subarch" in
4080         armv5t*)    enable fast_clz                ;;
4081         armv[6-8]*)
4082             enable fast_clz
4083             disabled fast_unaligned || enable fast_unaligned
4084             ;;
4085     esac
4086
4087 elif enabled avr32; then
4088
4089     case $cpu in
4090         ap7[02]0[0-2])
4091             subarch="avr32_ap"
4092             cpuflags="-mpart=$cpu"
4093         ;;
4094         ap)
4095             subarch="avr32_ap"
4096             cpuflags="-march=$cpu"
4097         ;;
4098         uc3[ab]*)
4099             subarch="avr32_uc"
4100             cpuflags="-mcpu=$cpu"
4101         ;;
4102         uc)
4103             subarch="avr32_uc"
4104             cpuflags="-march=$cpu"
4105         ;;
4106     esac
4107
4108 elif enabled bfin; then
4109
4110     cpuflags="-mcpu=$cpu"
4111
4112 elif enabled mips; then
4113
4114     cpuflags="-march=$cpu"
4115
4116     case $cpu in
4117         24kc)
4118             disable mips64r6
4119             disable mipsfpu
4120             disable mipsdsp
4121             disable mipsdspr2
4122             disable msa
4123         ;;
4124         24kf*)
4125             disable mips64r6
4126             disable mipsdsp
4127             disable mipsdspr2
4128             disable msa
4129         ;;
4130         24kec|34kc|1004kc)
4131             disable mips64r6
4132             disable mipsfpu
4133             disable mipsdspr2
4134             disable msa
4135         ;;
4136         24kef*|34kf*|1004kf*)
4137             disable mips64r6
4138             disable mipsdspr2
4139             disable msa
4140         ;;
4141         74kc)
4142             disable mips64r6
4143             disable mipsfpu
4144             disable msa
4145         ;;
4146         74kf)
4147             disable mips64r6
4148             disable msa
4149         ;;
4150         p5600)
4151             disable mips64r6
4152             disable mipsdsp
4153             disable mipsdspr2
4154             check_cflags "-mtune=p5600" &&
4155             check_cflags "-mfp64 -msched-weight -mload-store-pairs -funroll-loops" &&
4156             add_asflags "-mfp64"
4157         ;;
4158         i6400)
4159             disable mipsdsp
4160             disable mipsdspr2
4161             disable mipsfpu
4162
4163             check_cflags "-mtune=i6400 -mabi=64"
4164             check_ldflags "-mabi=64"
4165         ;;
4166         loongson*)
4167             disable mipsfpu
4168             disable mips32r2
4169             disable mips64r6
4170             disable mipsdsp
4171             disable mipsdspr2
4172             disable msa
4173             enable local_aligned_8 local_aligned_16 local_aligned_32
4174             enable simd_align_16
4175             enable fast_64bit
4176             enable fast_clz
4177             enable fast_cmov
4178             enable fast_unaligned
4179             disable aligned_stack
4180             case $cpu in
4181                 loongson3*)
4182                     cpuflags="-march=loongson3a -mhard-float -fno-expensive-optimizations"
4183                 ;;
4184                 loongson2e)
4185                     cpuflags="-march=loongson2e -mhard-float -fno-expensive-optimizations"
4186                 ;;
4187                 loongson2f)
4188                     cpuflags="-march=loongson2f -mhard-float -fno-expensive-optimizations"
4189                 ;;
4190             esac
4191         ;;
4192         generic)
4193             disable mips64r6
4194             disable msa
4195         ;;
4196         *)
4197             disable mipsfpu
4198             disable mips32r2
4199             disable mips64r6
4200             disable mipsdsp
4201             disable mipsdspr2
4202             disable msa
4203         ;;
4204     esac
4205
4206 elif enabled ppc; then
4207
4208     disable ldbrx
4209
4210     case $(tolower $cpu) in
4211         601|ppc601|powerpc601)
4212             cpuflags="-mcpu=601"
4213             disable altivec
4214         ;;
4215         603*|ppc603*|powerpc603*)
4216             cpuflags="-mcpu=603"
4217             disable altivec
4218         ;;
4219         604*|ppc604*|powerpc604*)
4220             cpuflags="-mcpu=604"
4221             disable altivec
4222         ;;
4223         g3|75*|ppc75*|powerpc75*)
4224             cpuflags="-mcpu=750"
4225             disable altivec
4226         ;;
4227         g4|745*|ppc745*|powerpc745*)
4228             cpuflags="-mcpu=7450"
4229             disable vsx
4230         ;;
4231         74*|ppc74*|powerpc74*)
4232             cpuflags="-mcpu=7400"
4233             disable vsx
4234         ;;
4235         g5|970|ppc970|powerpc970)
4236             cpuflags="-mcpu=970"
4237             disable vsx
4238         ;;
4239         power[3-6]*)
4240             cpuflags="-mcpu=$cpu"
4241             disable vsx
4242         ;;
4243         power[7-8]*)
4244             cpuflags="-mcpu=$cpu"
4245         ;;
4246         cell)
4247             cpuflags="-mcpu=cell"
4248             enable ldbrx
4249             disable vsx
4250         ;;
4251         e500mc)
4252             cpuflags="-mcpu=e500mc"
4253             disable altivec
4254         ;;
4255         e500v2)
4256             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
4257             disable altivec
4258             disable dcbzl
4259         ;;
4260         e500)
4261             cpuflags="-mcpu=8540 -mhard-float"
4262             disable altivec
4263             disable dcbzl
4264         ;;
4265     esac
4266
4267 elif enabled sparc; then
4268
4269     case $cpu in
4270         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
4271             cpuflags="-mcpu=$cpu"
4272         ;;
4273         ultrasparc*|niagara[234])
4274             cpuflags="-mcpu=$cpu"
4275         ;;
4276     esac
4277
4278 elif enabled x86; then
4279
4280     case $cpu in
4281         i[345]86|pentium)
4282             cpuflags="-march=$cpu"
4283             disable i686
4284             disable mmx
4285         ;;
4286         # targets that do NOT support nopl and conditional mov (cmov)
4287         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
4288             cpuflags="-march=$cpu"
4289             disable i686
4290         ;;
4291         # targets that do support nopl and conditional mov (cmov)
4292         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx\
4293         |core*|atom|bonnell|nehalem|westmere|silvermont|sandybridge|ivybridge|haswell|broadwell|amdfam10|barcelona|b[dt]ver*)
4294             cpuflags="-march=$cpu"
4295             enable i686
4296             enable fast_cmov
4297         ;;
4298         # targets that do support conditional mov but on which it's slow
4299         pentium4|pentium4m|prescott|nocona)
4300             cpuflags="-march=$cpu"
4301             enable i686
4302             disable fast_cmov
4303         ;;
4304     esac
4305
4306 fi
4307
4308 if [ "$cpu" != generic ]; then
4309     add_cflags  $cpuflags
4310     add_asflags $cpuflags
4311     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
4312 fi
4313
4314 # compiler sanity check
4315 check_exec <<EOF
4316 int main(void){ return 0; }
4317 EOF
4318 if test "$?" != 0; then
4319     echo "$cc is unable to create an executable file."
4320     if test -z "$cross_prefix" && ! enabled cross_compile ; then
4321         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
4322         echo "Only do this if you know what cross compiling means."
4323     fi
4324     die "C compiler test failed."
4325 fi
4326
4327 add_cppflags -D_ISOC99_SOURCE
4328 add_cxxflags -D__STDC_CONSTANT_MACROS
4329 check_cflags -std=c99
4330 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
4331 #include <stdlib.h>
4332 EOF
4333 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
4334 #include <stdlib.h>
4335 EOF
4336
4337 add_host_cppflags -D_ISOC99_SOURCE
4338 check_host_cflags -std=c99
4339 check_host_cflags -Wall
4340 check_host_cflags -O3
4341
4342 check_64bit(){
4343     arch32=$1
4344     arch64=$2
4345     expr=$3
4346     check_code cc "" "int test[2*($expr) - 1]" &&
4347         subarch=$arch64 || subarch=$arch32
4348 }
4349
4350 case "$arch" in
4351     aarch64|alpha|ia64)
4352         spic=$shared
4353     ;;
4354     mips)
4355         check_64bit mips mips64 '_MIPS_SIM > 1'
4356         spic=$shared
4357     ;;
4358     parisc)
4359         check_64bit parisc parisc64 'sizeof(void *) > 4'
4360         spic=$shared
4361     ;;
4362     ppc)
4363         check_64bit ppc ppc64 'sizeof(void *) > 4'
4364         spic=$shared
4365     ;;
4366     s390)
4367         check_64bit s390 s390x 'sizeof(void *) > 4'
4368         spic=$shared
4369     ;;
4370     sparc)
4371         check_64bit sparc sparc64 'sizeof(void *) > 4'
4372         spic=$shared
4373     ;;
4374     x86)
4375         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
4376         # Treat x32 as x64 for now. Note it also needs spic=$shared
4377         test "$subarch" = "x86_32" && check_cpp_condition stddef.h 'defined(__x86_64__)' &&
4378             subarch=x86_64
4379         if test "$subarch" = "x86_64"; then
4380             spic=$shared
4381         fi
4382     ;;
4383     ppc)
4384         check_cc <<EOF && subarch="ppc64"
4385         int test[(int)sizeof(char*) - 7];
4386 EOF
4387     ;;
4388 esac
4389
4390 enable $subarch
4391 enabled spic && enable_weak pic
4392
4393 # OS specific
4394 case $target_os in
4395     aix)
4396         SHFLAGS=-shared
4397         add_cppflags '-I\$(SRC_PATH)/compat/aix'
4398         enabled shared && add_ldflags -Wl,-brtl
4399         ;;
4400     android)
4401         disable symver
4402         enable section_data_rel_ro
4403         SLIB_INSTALL_NAME='$(SLIBNAME)'
4404         SLIB_INSTALL_LINKS=
4405         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
4406         ;;
4407     haiku)
4408         prefix_default="/boot/common"
4409         network_extralibs="-lnetwork"
4410         host_libs=
4411         ;;
4412     sunos)
4413         SHFLAGS='-shared -Wl,-h,$$(@F)'
4414         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
4415         network_extralibs="-lsocket -lnsl"
4416         add_cppflags -D__EXTENSIONS__
4417         # When using suncc to build, the Solaris linker will mark
4418         # an executable with each instruction set encountered by
4419         # the Solaris assembler.  As our libraries contain their own
4420         # guards for processor-specific code, instead suppress
4421         # generation of the HWCAPS ELF section on Solaris x86 only.
4422         enabled_all suncc x86 &&
4423             echo "hwcap_1 = OVERRIDE;" > mapfile &&
4424             add_ldflags -Wl,-M,mapfile
4425         nm_default='nm -P -g'
4426         SLIB_CREATE_DEF_CMD='$(Q)perl $(SRC_PATH)/compat/solaris/make_sunver.pl $$(filter %.ver,$$^) $(OBJS) | grep -v @ > $(SUBDIR)lib$(NAME).ver-sol2'
4427         ;;
4428     netbsd)
4429         disable symver
4430         oss_indev_extralibs="-lossaudio"
4431         oss_outdev_extralibs="-lossaudio"
4432         enabled gcc || check_ldflags -Wl,-zmuldefs
4433         ;;
4434     openbsd|bitrig)
4435         disable symver
4436         SHFLAGS='-shared'
4437         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
4438         SLIB_INSTALL_LINKS=
4439         oss_indev_extralibs="-lossaudio"
4440         oss_outdev_extralibs="-lossaudio"
4441         ;;
4442     dragonfly)
4443         disable symver
4444         ;;
4445     freebsd)
4446         ;;
4447     bsd/os)
4448         add_extralibs -lpoll -lgnugetopt
4449         strip="strip -d"
4450         ;;
4451     darwin)
4452         enabled ppc && add_asflags -force_cpusubtype_ALL
4453         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
4454         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
4455         strip="${strip} -x"
4456         add_ldflags -Wl,-dynamic,-search_paths_first
4457         SLIBSUF=".dylib"
4458         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
4459         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
4460         objformat="macho"
4461         enabled x86_64 && objformat="macho64"
4462         enabled_any pic shared x86_64 ||
4463             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
4464         ;;
4465     msys*)
4466         die "Native MSYS builds are discouraged, please use the MINGW environment.";
4467         ;;
4468     mingw32*|mingw64*)
4469         if test $target_os = "mingw32ce"; then
4470             disable network
4471         else
4472             target_os=mingw32
4473         fi
4474         decklink_outdev_extralibs="$decklink_outdev_extralibs -lole32 -loleaut32"
4475         decklink_indev_extralibs="$decklink_indev_extralibs -lole32 -loleaut32"
4476         LIBTARGET=i386
4477         if enabled x86_64; then
4478             LIBTARGET="i386:x86-64"
4479         elif enabled arm; then
4480             LIBTARGET=arm-wince
4481         fi
4482         enabled shared && ! enabled small && check_cmd $windres --version && enable gnu_windres
4483         enabled x86_32 && check_ldflags -Wl,--large-address-aware
4484         shlibdir_default="$bindir_default"
4485         SLIBPREF=""
4486         SLIBSUF=".dll"
4487         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
4488         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
4489         dlltool="${cross_prefix}dlltool"
4490         if check_cmd lib.exe -list; then
4491             SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); lib.exe /machine:$(LIBTARGET) /def:$$(@:$(SLIBSUF)=.def) /out:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
4492             if enabled x86_64; then
4493                 LIBTARGET=x64
4494             fi
4495         elif check_cmd $dlltool --version; then
4496             SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
4497         fi
4498         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4499         SLIB_INSTALL_LINKS=
4500         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
4501         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
4502         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--disable-auto-image-base'
4503         objformat="win32"
4504         ranlib=:
4505         enable dos_paths
4506         check_ldflags -Wl,--nxcompat,--dynamicbase
4507         # Lets work around some stupidity in binutils.
4508         # ld will strip relocations from executables even though we need them
4509         # for dynamicbase (ASLR).  Using -pie does retain the reloc section
4510         # however ld then forgets what the entry point should be (oops) so we
4511         # have to manually (re)set it.
4512         if enabled x86_32; then
4513             add_ldexeflags -Wl,--pic-executable,-e,_mainCRTStartup
4514         elif enabled x86_64; then
4515             add_ldexeflags -Wl,--pic-executable,-e,mainCRTStartup
4516             check_ldflags -Wl,--high-entropy-va # binutils 2.25
4517             # Set image base >4GB for extra entropy with HEASLR
4518             add_ldexeflags -Wl,--image-base,0x140000000
4519             append SHFLAGS -Wl,--image-base,0x180000000
4520         fi
4521         ;;
4522     win32|win64)
4523         disable symver
4524         if enabled shared; then
4525             # Link to the import library instead of the normal static library
4526             # for shared libs.
4527             LD_LIB='%.lib'
4528             # Cannot build both shared and static libs with MSVC or icl.
4529             disable static
4530         fi
4531         enabled x86_32 && check_ldflags -LARGEADDRESSAWARE
4532         shlibdir_default="$bindir_default"
4533         SLIBPREF=""
4534         SLIBSUF=".dll"
4535         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
4536         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
4537         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
4538         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4539         SLIB_INSTALL_LINKS=
4540         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
4541         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
4542         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
4543         objformat="win32"
4544         ranlib=:
4545         enable dos_paths
4546         ;;
4547     cygwin*)
4548         target_os=cygwin
4549         shlibdir_default="$bindir_default"
4550         SLIBPREF="cyg"
4551         SLIBSUF=".dll"
4552         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
4553         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
4554         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4555         SLIB_INSTALL_LINKS=
4556         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
4557         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
4558         objformat="win32"
4559         enable dos_paths
4560         enabled shared && ! enabled small && check_cmd $windres --version && enable gnu_windres
4561         ;;
4562     *-dos|freedos|opendos)
4563         network_extralibs="-lsocket"
4564         objformat="coff"
4565         enable dos_paths
4566         add_cppflags -U__STRICT_ANSI__
4567         ;;
4568     linux)
4569         enable dv1394
4570         enable section_data_rel_ro
4571         ;;
4572     irix*)
4573         target_os=irix
4574         ranlib="echo ignoring ranlib"
4575         ;;
4576     os/2*)
4577         strip="lxlite -CS"
4578         ln_s="cp -f"
4579         objformat="aout"
4580         add_cppflags -D_GNU_SOURCE
4581         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
4582         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
4583         LIBSUF="_s.a"
4584         SLIBPREF=""
4585         SLIBSUF=".dll"
4586         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
4587         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
4588         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
4589             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
4590             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
4591             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
4592             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
4593         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
4594             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
4595         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
4596         enable dos_paths
4597         enable_weak os2threads
4598         ;;
4599     gnu/kfreebsd)
4600         add_cppflags -D_BSD_SOURCE
4601         ;;
4602     gnu)
4603         ;;
4604     qnx)
4605         add_cppflags -D_QNX_SOURCE
4606         network_extralibs="-lsocket"
4607         ;;
4608     symbian)
4609         SLIBSUF=".dll"
4610         enable dos_paths
4611         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
4612         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
4613         add_ldflags -Wl,--target1-abs,--no-undefined \
4614                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
4615                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
4616         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
4617                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
4618                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
4619         ;;
4620     osf1)
4621         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
4622         ;;
4623     minix)
4624         ;;
4625     plan9)
4626         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
4627                      -D_REENTRANT_SOURCE        \
4628                      -D_RESEARCH_SOURCE         \
4629                      -DFD_SETSIZE=96            \
4630                      -DHAVE_SOCK_OPTS
4631         add_compat strtod.o strtod=avpriv_strtod
4632         network_extralibs='-lbsd'
4633         exeobjs=compat/plan9/main.o
4634         disable ffserver
4635         cp_f='cp'
4636         ;;
4637     none)
4638         ;;
4639     *)
4640         die "Unknown OS '$target_os'."
4641         ;;
4642 esac
4643
4644 # determine libc flavour
4645
4646 probe_libc(){
4647     pfx=$1
4648     pfx_no_=${pfx%_}
4649     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
4650     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
4651         eval ${pfx}libc_type=uclibc
4652         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4653     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
4654         eval ${pfx}libc_type=glibc
4655         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4656     # MinGW headers can be installed on Cygwin, so check for newlib first.
4657     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
4658         eval ${pfx}libc_type=newlib
4659         add_${pfx}cppflags -U__STRICT_ANSI__
4660     # MinGW64 is backwards compatible with MinGW32, so check for it first.
4661     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
4662         eval ${pfx}libc_type=mingw64
4663         if check_${pfx}cpp_condition _mingw.h "__MINGW64_VERSION_MAJOR < 3"; then
4664             add_compat msvcrt/snprintf.o
4665             add_cflags "-include $source_path/compat/msvcrt/snprintf.h"
4666         fi
4667         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4668         eval test \$${pfx_no_}cc_type = "gcc" &&
4669             add_${pfx}cppflags -D__printf__=__gnu_printf__
4670     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
4671          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
4672         eval ${pfx}libc_type=mingw32
4673         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
4674             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
4675             die "ERROR: MinGW32 runtime version must be >= 3.15."
4676         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4677         eval test \$${pfx_no_}cc_type = "gcc" &&
4678             add_${pfx}cppflags -D__printf__=__gnu_printf__
4679     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
4680         eval ${pfx}libc_type=msvcrt
4681         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
4682             if [ "$pfx" = host_ ]; then
4683                 add_host_cppflags -Dsnprintf=_snprintf
4684             else
4685                 add_compat strtod.o strtod=avpriv_strtod
4686                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
4687                                              _snprintf=avpriv_snprintf  \
4688                                              vsnprintf=avpriv_vsnprintf
4689             fi
4690         fi
4691         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
4692         # 0x601 by default unless something else is set by the user.
4693         # This can easily lead to us detecting functions only present
4694         # in such new versions and producing binaries requiring windows 7.0.
4695         # Therefore explicitly set the default to XP unless the user has
4696         # set something else on the command line.
4697         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
4698         # family. For these cases, configure is free to use any functions
4699         # found in the SDK headers by default. (Alternatively, we could force
4700         # _WIN32_WINNT to 0x0602 in that case.)
4701         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
4702             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
4703 #ifdef WINAPI_FAMILY
4704 #include <winapifamily.h>
4705 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4706 #error not desktop
4707 #endif
4708 #endif
4709 EOF
4710     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4711         eval ${pfx}libc_type=klibc
4712     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4713         eval ${pfx}libc_type=bionic
4714     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4715         eval ${pfx}libc_type=solaris
4716         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4717     fi
4718     check_${pfx}cc <<EOF
4719 #include <time.h>
4720 void *v = localtime_r;
4721 EOF
4722 test "$?" != 0 && check_${pfx}cc -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 <<EOF && add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4723 #include <time.h>
4724 void *v = localtime_r;
4725 EOF
4726
4727 }
4728
4729 probe_libc
4730 test -n "$libc_type" && enable libc_$libc_type
4731 probe_libc host_
4732 test -n "$host_libc_type" && enable host_libc_$host_libc_type
4733
4734 case $libc_type in
4735     bionic)
4736         add_compat strtod.o strtod=avpriv_strtod
4737         ;;
4738 esac
4739
4740 # hacks for compiler/libc/os combinations
4741
4742 if enabled_all tms470 libc_glibc; then
4743     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4744     add_cppflags -D__USER_LABEL_PREFIX__=
4745     add_cppflags -D__builtin_memset=memset
4746     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4747     add_cflags   -pds=48    # incompatible redefinition of macro
4748 fi
4749
4750 if enabled_all ccc libc_glibc; then
4751     add_ldflags -Wl,-z,now  # calls to libots crash without this
4752 fi
4753
4754 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4755     add_cppflags '-I\$(SRC_PATH)/compat/float'
4756
4757 esc(){
4758     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4759 }
4760
4761 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $FFMPEG_CONFIGURATION)" >config.fate
4762
4763 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4764
4765 set_default libdir
4766 : ${shlibdir_default:="$libdir"}
4767 : ${pkgconfigdir_default:="$libdir/pkgconfig"}
4768
4769 set_default $PATHS_LIST
4770 set_default nm
4771
4772 # we need to build at least one lib type
4773 if ! enabled_any static shared; then
4774     cat <<EOF
4775 At least one library type must be built.
4776 Specify --enable-static to build the static libraries or --enable-shared to
4777 build the shared libraries as well. To only build the shared libraries specify
4778 --disable-static in addition to --enable-shared.
4779 EOF
4780     exit 1;
4781 fi
4782
4783 die_license_disabled() {
4784     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
4785 }
4786
4787 die_license_disabled_gpl() {
4788     enabled $1 || { enabled $2 && die "$2 is incompatible with the gpl and --enable-$1 is not specified."; }
4789 }
4790
4791 die_license_disabled gpl frei0r
4792 die_license_disabled gpl libcdio
4793 die_license_disabled gpl librubberband
4794 die_license_disabled gpl libsmbclient
4795 die_license_disabled gpl libutvideo
4796 die_license_disabled gpl libvidstab
4797 die_license_disabled gpl libx264
4798 die_license_disabled gpl libx265
4799 die_license_disabled gpl libxavs
4800 die_license_disabled gpl libxvid
4801 die_license_disabled gpl libzvbi
4802 die_license_disabled gpl x11grab
4803
4804 die_license_disabled nonfree libaacplus
4805 die_license_disabled nonfree libfaac
4806 die_license_disabled nonfree nvenc
4807 enabled gpl && die_license_disabled_gpl nonfree libfdk_aac
4808 enabled gpl && die_license_disabled_gpl nonfree openssl
4809
4810 die_license_disabled version3 gmp
4811 die_license_disabled version3 libopencore_amrnb
4812 die_license_disabled version3 libopencore_amrwb
4813 die_license_disabled version3 libsmbclient
4814 die_license_disabled version3 libvo_aacenc
4815 die_license_disabled version3 libvo_amrwbenc
4816
4817 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
4818
4819 disabled optimizations || check_cflags -fomit-frame-pointer
4820
4821 enable_weak_pic() {
4822     disabled pic && return
4823     enable pic
4824     add_cppflags -DPIC
4825     case "$target_os" in
4826     mingw*|cygwin*)
4827         ;;
4828     *)
4829         add_cflags -fPIC
4830         ;;
4831     esac
4832     add_asflags  -fPIC
4833 }
4834
4835 enabled pic && enable_weak_pic
4836
4837 check_cc <<EOF || die "Symbol mangling check failed."
4838 int ff_extern;
4839 EOF
4840 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4841 extern_prefix=${sym%%ff_extern*}
4842
4843 check_cc <<EOF && enable_weak inline_asm
4844 void foo(void) { __asm__ volatile ("" ::); }
4845 EOF
4846
4847 _restrict=
4848 for restrict_keyword in restrict __restrict__ __restrict; do
4849     check_cc <<EOF && _restrict=$restrict_keyword && break
4850 void foo(char * $restrict_keyword p);
4851 EOF
4852 done
4853
4854 check_cc <<EOF && enable pragma_deprecated
4855 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4856 EOF
4857
4858 check_cc <<EOF && enable attribute_packed
4859 struct { int x; } __attribute__((packed)) x;
4860 EOF
4861
4862 check_cc <<EOF && enable attribute_may_alias
4863 union { int x; } __attribute__((may_alias)) x;
4864 EOF
4865
4866 check_cc <<EOF || die "endian test failed"
4867 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4868 EOF
4869 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4870
4871 if ! enabled ppc64 || enabled bigendian; then
4872     disable vsx
4873 fi
4874
4875 check_gas() {
4876     log "check_gas using '$as' as AS"
4877     # :vararg is used on aarch64, arm and ppc altivec
4878     check_as <<EOF || return 1
4879 .macro m n, y:vararg=0
4880 \n: .int \y
4881 .endm
4882 m x
4883 EOF
4884     # .altmacro is only used in arm asm
4885     ! enabled arm || check_as <<EOF || return 1