ppc: Fix the bug of fft for little endian environment on POWER7 and later
[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 [PREFIX/lib]
88   --incdir=DIR             install includes in DIR [PREFIX/include]
89   --mandir=DIR             install man page in DIR [PREFIX/share/man]
90   --enable-rpath           use rpath to allow installing libraries in paths
91                            not part of the dynamic linker search path
92
93 Licensing options:
94   --enable-gpl             allow use of GPL code, the resulting libs
95                            and binaries will be under GPL [no]
96   --enable-version3        upgrade (L)GPL to version 3 [no]
97   --enable-nonfree         allow use of nonfree code, the resulting libs
98                            and binaries will be unredistributable [no]
99
100 Configuration options:
101   --disable-static         do not build static libraries [no]
102   --enable-shared          build shared libraries [no]
103   --enable-small           optimize for size instead of speed
104   --disable-runtime-cpudetect disable detecting cpu capabilities at runtime (smaller binary)
105   --enable-gray            enable full grayscale support (slower color)
106   --disable-swscale-alpha  disable alpha channel support in swscale
107   --disable-all            disable building components, libraries and programs
108   --enable-incompatible-libav-abi enable incompatible Libav fork ABI [no]
109   --enable-raise-major     increase major version numbers in sonames [no]
110
111 Program options:
112   --disable-programs       do not build command line programs
113   --disable-ffmpeg         disable ffmpeg build
114   --disable-ffplay         disable ffplay build
115   --disable-ffprobe        disable ffprobe build
116   --disable-ffserver       disable ffserver build
117
118 Documentation options:
119   --disable-doc            do not build documentation
120   --disable-htmlpages      do not build HTML documentation pages
121   --disable-manpages       do not build man documentation pages
122   --disable-podpages       do not build POD documentation pages
123   --disable-txtpages       do not build text documentation pages
124
125 Component options:
126   --disable-avdevice       disable libavdevice build
127   --disable-avcodec        disable libavcodec build
128   --disable-avformat       disable libavformat build
129   --disable-avutil         disable libavutil build
130   --disable-swresample     disable libswresample build
131   --disable-swscale        disable libswscale build
132   --disable-postproc       disable libpostproc build
133   --disable-avfilter       disable libavfilter build
134   --enable-avresample      enable libavresample build [no]
135   --disable-pthreads       disable pthreads [auto]
136   --disable-w32threads     disable Win32 threads [auto]
137   --disable-os2threads     disable OS/2 threads [auto]
138   --disable-network        disable network support [no]
139   --disable-dct            disable DCT code
140   --disable-dwt            disable DWT code
141   --disable-error-resilience disable error resilience code
142   --disable-lsp            disable LSP code
143   --disable-lzo            disable LZO decoder code
144   --disable-mdct           disable MDCT code
145   --disable-rdft           disable RDFT code
146   --disable-fft            disable FFT code
147
148 Hardware accelerators:
149   --disable-dxva2          disable DXVA2 code [autodetect]
150   --disable-vaapi          disable VAAPI code [autodetect]
151   --disable-vda            disable VDA code [autodetect]
152   --disable-vdpau          disable VDPAU code [autodetect]
153
154 Individual component options:
155   --disable-everything     disable all components listed below
156   --disable-encoder=NAME   disable encoder NAME
157   --enable-encoder=NAME    enable encoder NAME
158   --disable-encoders       disable all encoders
159   --disable-decoder=NAME   disable decoder NAME
160   --enable-decoder=NAME    enable decoder NAME
161   --disable-decoders       disable all decoders
162   --disable-hwaccel=NAME   disable hwaccel NAME
163   --enable-hwaccel=NAME    enable hwaccel NAME
164   --disable-hwaccels       disable all hwaccels
165   --disable-muxer=NAME     disable muxer NAME
166   --enable-muxer=NAME      enable muxer NAME
167   --disable-muxers         disable all muxers
168   --disable-demuxer=NAME   disable demuxer NAME
169   --enable-demuxer=NAME    enable demuxer NAME
170   --disable-demuxers       disable all demuxers
171   --enable-parser=NAME     enable parser NAME
172   --disable-parser=NAME    disable parser NAME
173   --disable-parsers        disable all parsers
174   --enable-bsf=NAME        enable bitstream filter NAME
175   --disable-bsf=NAME       disable bitstream filter NAME
176   --disable-bsfs           disable all bitstream filters
177   --enable-protocol=NAME   enable protocol NAME
178   --disable-protocol=NAME  disable protocol NAME
179   --disable-protocols      disable all protocols
180   --enable-indev=NAME      enable input device NAME
181   --disable-indev=NAME     disable input device NAME
182   --disable-indevs         disable input devices
183   --enable-outdev=NAME     enable output device NAME
184   --disable-outdev=NAME    disable output device NAME
185   --disable-outdevs        disable output devices
186   --disable-devices        disable all devices
187   --enable-filter=NAME     enable filter NAME
188   --disable-filter=NAME    disable filter NAME
189   --disable-filters        disable all filters
190
191 External library support:
192   --enable-avisynth        enable reading of AviSynth script files [no]
193   --disable-bzlib          disable bzlib [autodetect]
194   --enable-fontconfig      enable fontconfig
195   --enable-frei0r          enable frei0r video filtering
196   --enable-gnutls          enable gnutls [no]
197   --disable-iconv          disable iconv [autodetect]
198   --enable-ladspa          enable LADSPA audio filtering
199   --enable-libaacplus      enable AAC+ encoding via libaacplus [no]
200   --enable-libass          enable libass subtitles rendering [no]
201   --enable-libbluray       enable BluRay reading using libbluray [no]
202   --enable-libbs2b         enable bs2b DSP library [no]
203   --enable-libcaca         enable textual display using libcaca
204   --enable-libcelt         enable CELT decoding via libcelt [no]
205   --enable-libcdio         enable audio CD grabbing with libcdio
206   --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394
207                            and libraw1394 [no]
208   --enable-libfaac         enable AAC encoding via libfaac [no]
209   --enable-libfdk-aac      enable AAC de/encoding via libfdk-aac [no]
210   --enable-libflite        enable flite (voice synthesis) support via libflite [no]
211   --enable-libfreetype     enable libfreetype [no]
212   --enable-libgme          enable Game Music Emu via libgme [no]
213   --enable-libgsm          enable GSM de/encoding via libgsm [no]
214   --enable-libiec61883     enable iec61883 via libiec61883 [no]
215   --enable-libilbc         enable iLBC de/encoding via libilbc [no]
216   --enable-libmodplug      enable ModPlug via libmodplug [no]
217   --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
218   --enable-libnut          enable NUT (de)muxing via libnut,
219                            native (de)muxer exists [no]
220   --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
221   --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
222   --enable-libopencv       enable video filtering via libopencv [no]
223   --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]
224   --enable-libopus         enable Opus de/encoding via libopus [no]
225   --enable-libpulse        enable Pulseaudio input via libpulse [no]
226   --enable-libquvi         enable quvi input via libquvi [no]
227   --enable-librtmp         enable RTMP[E] support via librtmp [no]
228   --enable-libschroedinger enable Dirac de/encoding via libschroedinger [no]
229   --enable-libshine        enable fixed-point MP3 encoding via libshine [no]
230   --enable-libsoxr         enable Include libsoxr resampling [no]
231   --enable-libspeex        enable Speex de/encoding via libspeex [no]
232   --enable-libssh          enable SFTP protocol via libssh [no]
233   --enable-libstagefright-h264  enable H.264 decoding via libstagefright [no]
234   --enable-libtheora       enable Theora encoding via libtheora [no]
235   --enable-libtwolame      enable MP2 encoding via libtwolame [no]
236   --enable-libutvideo      enable Ut Video encoding and decoding via libutvideo [no]
237   --enable-libv4l2         enable libv4l2/v4l-utils [no]
238   --enable-libvidstab      enable video stabilization using vid.stab [no]
239   --enable-libvo-aacenc    enable AAC encoding via libvo-aacenc [no]
240   --enable-libvo-amrwbenc  enable AMR-WB encoding via libvo-amrwbenc [no]
241   --enable-libvorbis       enable Vorbis en/decoding via libvorbis,
242                            native implementation exists [no]
243   --enable-libvpx          enable VP8 and VP9 de/encoding via libvpx [no]
244   --enable-libwavpack      enable wavpack encoding via libwavpack [no]
245   --enable-libwebp         enable WebP encoding via libwebp [no]
246   --enable-libx264         enable H.264 encoding via x264 [no]
247   --enable-libx265         enable HEVC encoding via x265 [no]
248   --enable-libxavs         enable AVS encoding via xavs [no]
249   --enable-libxvid         enable Xvid encoding via xvidcore,
250                            native MPEG-4/Xvid encoder exists [no]
251   --enable-libzmq          enable message passing via libzmq [no]
252   --enable-libzvbi         enable teletext support via libzvbi [no]
253   --enable-decklink        enable Blackmagick DeckLink output [no]
254   --enable-openal          enable OpenAL 1.1 capture support [no]
255   --enable-opencl          enable OpenCL code
256   --enable-opengl          enable OpenGL rendering [no]
257   --enable-openssl         enable openssl [no]
258   --enable-x11grab         enable X11 grabbing [no]
259   --disable-xlib           disable xlib [autodetect]
260   --disable-zlib           disable zlib [autodetect]
261
262 Toolchain options:
263   --arch=ARCH              select architecture [$arch]
264   --cpu=CPU                select the minimum required CPU (affects
265                            instruction selection, may crash on older CPUs)
266   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
267   --progs-suffix=SUFFIX    program name suffix []
268   --enable-cross-compile   assume a cross-compiler is used
269   --sysroot=PATH           root of cross-build tree
270   --sysinclude=PATH        location of cross-build system headers
271   --target-os=OS           compiler targets OS [$target_os]
272   --target-exec=CMD        command to run executables on target
273   --target-path=DIR        path to view of build directory on target
274   --target-samples=DIR     path to samples directory on target
275   --tempprefix=PATH        force fixed dir/prefix instead of mktemp for checks
276   --toolchain=NAME         set tool defaults according to NAME
277   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
278   --nm=NM                  use nm tool NM [$nm_default]
279   --ar=AR                  use archive tool AR [$ar_default]
280   --as=AS                  use assembler AS [$as_default]
281   --windres=WINDRES        use windows resource compiler WINDRES [$windres_default]
282   --yasmexe=EXE            use yasm-compatible assembler EXE [$yasmexe_default]
283   --cc=CC                  use C compiler CC [$cc_default]
284   --cxx=CXX                use C compiler CXX [$cxx_default]
285   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
286   --ld=LD                  use linker LD [$ld_default]
287   --pkg-config=PKGCONF     use pkg-config PKGCONF [$pkg_config_default]
288   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
289   --ranlib=RANLIB          use ranlib RANLIB [$ranlib_default]
290   --host-cc=HOSTCC         use host C compiler HOSTCC
291   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
292   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
293   --host-ld=HOSTLD         use host linker HOSTLD
294   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
295   --host-libs=HLIBS        use libs HLIBS when linking for host
296   --host-os=OS             compiler host OS [$target_os]
297   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
298   --extra-cxxflags=ECFLAGS add ECFLAGS to CXXFLAGS [$CXXFLAGS]
299   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
300   --extra-libs=ELIBS       add ELIBS [$ELIBS]
301   --extra-version=STRING   version string suffix []
302   --optflags=OPTFLAGS      override optimization-related compiler flags
303   --build-suffix=SUFFIX    library name suffix []
304   --enable-pic             build position-independent code
305   --enable-thumb           compile for Thumb instruction set
306   --enable-lto             use link-time optimization
307
308 Advanced options (experts only):
309   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
310   --disable-symver         disable symbol versioning
311   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
312   --disable-safe-bitstream-reader
313                            disable buffer boundary checking in bitreaders
314                            (faster, but may crash)
315   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
316   --enable-sram            allow use of on-chip SRAM
317   --sws-max-filter-size=N  the max filter size swscale uses [$sws_max_filter_size_default]
318
319 Optimization options (experts only):
320   --disable-asm            disable all assembler optimizations
321   --disable-altivec        disable AltiVec optimizations
322   --disable-amd3dnow       disable 3DNow! optimizations
323   --disable-amd3dnowext    disable 3DNow! extended optimizations
324   --disable-mmx            disable MMX optimizations
325   --disable-mmxext         disable MMXEXT optimizations
326   --disable-sse            disable SSE optimizations
327   --disable-sse2           disable SSE2 optimizations
328   --disable-sse3           disable SSE3 optimizations
329   --disable-ssse3          disable SSSE3 optimizations
330   --disable-sse4           disable SSE4 optimizations
331   --disable-sse42          disable SSE4.2 optimizations
332   --disable-avx            disable AVX optimizations
333   --disable-xop            disable XOP optimizations
334   --disable-fma3           disable FMA3 optimizations
335   --disable-fma4           disable FMA4 optimizations
336   --disable-avx2           disable AVX2 optimizations
337   --disable-armv5te        disable armv5te optimizations
338   --disable-armv6          disable armv6 optimizations
339   --disable-armv6t2        disable armv6t2 optimizations
340   --disable-vfp            disable VFP optimizations
341   --disable-neon           disable NEON optimizations
342   --disable-inline-asm     disable use of inline assembler
343   --disable-yasm           disable use of yasm assembler
344   --disable-mips32r2       disable MIPS32R2 optimizations
345   --disable-mipsdspr1      disable MIPS DSP ASE R1 optimizations
346   --disable-mipsdspr2      disable MIPS DSP ASE R2 optimizations
347   --disable-mipsfpu        disable floating point MIPS optimizations
348   --disable-fast-unaligned consider unaligned accesses slow
349
350 Developer options (useful when working on FFmpeg itself):
351   --disable-debug          disable debugging symbols
352   --enable-debug=LEVEL     set the debug level [$debuglevel]
353   --disable-optimizations  disable compiler optimizations
354   --enable-extra-warnings  enable more compiler warnings
355   --disable-stripping      disable stripping of executables and shared libraries
356   --assert-level=level     0(default), 1 or 2, amount of assertion testing,
357                            2 causes a slowdown at runtime.
358   --enable-memory-poisoning fill heap uninitialized allocated space with arbitrary data
359   --valgrind=VALGRIND      run "make fate" tests through valgrind to detect memory
360                            leaks and errors, using the specified valgrind binary.
361                            Cannot be combined with --target-exec
362   --enable-ftrapv          Trap arithmetic overflows
363   --samples=PATH           location of test samples for FATE, if not set use
364                            \$FATE_SAMPLES at make invocation time.
365   --enable-neon-clobber-test check NEON registers for clobbering (should be
366                            used only for debugging purposes)
367   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
368                            should be used only for debugging purposes)
369   --enable-random          randomly enable/disable components
370   --disable-random
371   --enable-random=LIST     randomly enable/disable specific components or
372   --disable-random=LIST    component groups. LIST is a comma-separated list
373                            of NAME[:PROB] entries where NAME is a component
374                            (group) and PROB the probability associated with
375                            NAME (default 0.5).
376   --random-seed=VALUE      seed value for --enable/disable-random
377
378 NOTE: Object files are built at the place where configure is launched.
379 EOF
380   exit 0
381 }
382
383 quotes='""'
384
385 log(){
386     echo "$@" >> $logfile
387 }
388
389 log_file(){
390     log BEGIN $1
391     pr -n -t $1 >> $logfile
392     log END $1
393 }
394
395 echolog(){
396     log "$@"
397     echo "$@"
398 }
399
400 warn(){
401     log "WARNING: $*"
402     WARNINGS="${WARNINGS}WARNING: $*\n"
403 }
404
405 die(){
406     echolog "$@"
407     cat <<EOF
408
409 If you think configure made a mistake, make sure you are using the latest
410 version from Git.  If the latest version fails, report the problem to the
411 ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
412 EOF
413     if disabled logging; then
414         cat <<EOF
415 Rerun configure with logging enabled (do not use --disable-logging), and
416 include the log this produces with your report.
417 EOF
418     else
419         cat <<EOF
420 Include the log file "$logfile" produced by configure as this will help
421 solve the problem.
422 EOF
423     fi
424     exit 1
425 }
426
427 # Avoid locale weirdness, besides we really just want to translate ASCII.
428 toupper(){
429     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
430 }
431
432 tolower(){
433     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
434 }
435
436 c_escape(){
437     echo "$*" | sed 's/["\\]/\\\0/g'
438 }
439
440 sh_quote(){
441     v=$(echo "$1" | sed "s/'/'\\\\''/g")
442     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
443     echo "$v"
444 }
445
446 cleanws(){
447     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//;s/\\r//g'
448 }
449
450 filter(){
451     pat=$1
452     shift
453     for v; do
454         eval "case $v in $pat) echo $v ;; esac"
455     done
456 }
457
458 filter_out(){
459     pat=$1
460     shift
461     for v; do
462         eval "case $v in $pat) ;; *) echo $v ;; esac"
463     done
464 }
465
466 map(){
467     m=$1
468     shift
469     for v; do eval $m; done
470 }
471
472 add_suffix(){
473     suffix=$1
474     shift
475     for v; do echo ${v}${suffix}; done
476 }
477
478 set_all(){
479     value=$1
480     shift
481     for var in $*; do
482         eval $var=$value
483     done
484 }
485
486 set_weak(){
487     value=$1
488     shift
489     for var; do
490         eval : \${$var:=$value}
491     done
492 }
493
494 sanitize_var_name(){
495     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
496 }
497
498 set_safe(){
499     var=$1
500     shift
501     eval $(sanitize_var_name "$var")='$*'
502 }
503
504 get_safe(){
505     eval echo \$$(sanitize_var_name "$1")
506 }
507
508 pushvar(){
509     for pvar in $*; do
510         eval level=\${${pvar}_level:=0}
511         eval ${pvar}_${level}="\$$pvar"
512         eval ${pvar}_level=$(($level+1))
513     done
514 }
515
516 popvar(){
517     for pvar in $*; do
518         eval level=\${${pvar}_level:-0}
519         test $level = 0 && continue
520         eval level=$(($level-1))
521         eval $pvar="\${${pvar}_${level}}"
522         eval ${pvar}_level=$level
523         eval unset ${pvar}_${level}
524     done
525 }
526
527 enable(){
528     set_all yes $*
529 }
530
531 disable(){
532     set_all no $*
533 }
534
535 enable_weak(){
536     set_weak yes $*
537 }
538
539 disable_weak(){
540     set_weak no $*
541 }
542
543 enable_safe(){
544     for var; do
545         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
546     done
547 }
548
549 disable_safe(){
550     for var; do
551         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
552     done
553 }
554
555 do_enable_deep(){
556     for var; do
557         enabled $var && continue
558         eval sel="\$${var}_select"
559         eval sgs="\$${var}_suggest"
560         pushvar var sgs
561         enable_deep $sel
562         popvar sgs
563         enable_deep_weak $sgs
564         popvar var
565     done
566 }
567
568 enable_deep(){
569     do_enable_deep $*
570     enable $*
571 }
572
573 enable_deep_weak(){
574     for var; do
575         disabled $var && continue
576         pushvar var
577         do_enable_deep $var
578         popvar var
579         enable_weak $var
580     done
581 }
582
583 enabled(){
584     test "${1#!}" = "$1" && op== || op=!=
585     eval test "x\$${1#!}" $op "xyes"
586 }
587
588 disabled(){
589     test "${1#!}" = "$1" && op== || op=!=
590     eval test "x\$${1#!}" $op "xno"
591 }
592
593 enabled_all(){
594     for opt; do
595         enabled $opt || return 1
596     done
597 }
598
599 disabled_all(){
600     for opt; do
601         disabled $opt || return 1
602     done
603 }
604
605 enabled_any(){
606     for opt; do
607         enabled $opt && return 0
608     done
609 }
610
611 disabled_any(){
612     for opt; do
613         disabled $opt && return 0
614     done
615     return 1
616 }
617
618 set_default(){
619     for opt; do
620         eval : \${$opt:=\$${opt}_default}
621     done
622 }
623
624 is_in(){
625     value=$1
626     shift
627     for var in $*; do
628         [ $var = $value ] && return 0
629     done
630     return 1
631 }
632
633 do_check_deps(){
634     for cfg; do
635         cfg="${cfg#!}"
636         enabled ${cfg}_checking && die "Circular dependency for $cfg."
637         disabled ${cfg}_checking && continue
638         enable ${cfg}_checking
639         append allopts $cfg
640
641         eval dep_all="\$${cfg}_deps"
642         eval dep_any="\$${cfg}_deps_any"
643         eval dep_sel="\$${cfg}_select"
644         eval dep_sgs="\$${cfg}_suggest"
645         eval dep_ifa="\$${cfg}_if"
646         eval dep_ifn="\$${cfg}_if_any"
647
648         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
649         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
650         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
651
652         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
653         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
654         enabled_all  $dep_all || disable $cfg
655         enabled_any  $dep_any || disable $cfg
656         disabled_any $dep_sel && disable $cfg
657
658         if enabled $cfg; then
659             enable_deep $dep_sel
660             enable_deep_weak $dep_sgs
661         fi
662
663         disable ${cfg}_checking
664     done
665 }
666
667 check_deps(){
668     unset allopts
669
670     do_check_deps "$@"
671
672     for cfg in $allopts; do
673         enabled $cfg || continue
674         eval dep_extralibs="\$${cfg}_extralibs"
675         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
676     done
677 }
678
679 print_config(){
680     pfx=$1
681     files=$2
682     shift 2
683     map 'eval echo "$v \${$v:-no}"' "$@" |
684     awk "BEGIN { split(\"$files\", files) }
685         {
686             c = \"$pfx\" toupper(\$1);
687             v = \$2;
688             sub(/yes/, 1, v);
689             sub(/no/,  0, v);
690             for (f in files) {
691                 file = files[f];
692                 if (file ~ /\\.h\$/) {
693                     printf(\"#define %s %d\\n\", c, v) >>file;
694                 } else if (file ~ /\\.asm\$/) {
695                     printf(\"%%define %s %d\\n\", c, v) >>file;
696                 } else if (file ~ /\\.mak\$/) {
697                     n = -v ? \"\" : \"!\";
698                     printf(\"%s%s=yes\\n\", n, c) >>file;
699                 } else if (file ~ /\\.texi\$/) {
700                     pre = -v ? \"\" : \"@c \";
701                     yesno = \$2;
702                     c2 = tolower(c);
703                     gsub(/_/, \"-\", c2);
704                     printf(\"%s@set %s %s\\n\", pre, c2, yesno) >>file;
705                 }
706             }
707         }"
708 }
709
710 print_enabled(){
711     suf=$1
712     shift
713     for v; do
714         enabled $v && printf "%s\n" ${v%$suf};
715     done
716 }
717
718 append(){
719     var=$1
720     shift
721     eval "$var=\"\$$var $*\""
722 }
723
724 prepend(){
725     var=$1
726     shift
727     eval "$var=\"$* \$$var\""
728 }
729
730 unique(){
731     var=$1
732     uniq_list=""
733     for tok in $(eval echo \$$var); do
734         uniq_list="$(filter_out $tok $uniq_list) $tok"
735     done
736     eval "$var=\"${uniq_list}\""
737 }
738
739 add_cppflags(){
740     append CPPFLAGS "$@"
741 }
742
743 add_cflags(){
744     append CFLAGS $($cflags_filter "$@")
745 }
746
747 add_cxxflags(){
748     append CXXFLAGS $($cflags_filter "$@")
749 }
750
751 add_asflags(){
752     append ASFLAGS $($asflags_filter "$@")
753 }
754
755 add_ldflags(){
756     append LDFLAGS $($ldflags_filter "$@")
757 }
758
759 add_stripflags(){
760     append ASMSTRIPFLAGS "$@"
761 }
762
763 add_extralibs(){
764     prepend extralibs $($ldflags_filter "$@")
765 }
766
767 add_host_cppflags(){
768     append host_cppflags "$@"
769 }
770
771 add_host_cflags(){
772     append host_cflags $($host_cflags_filter "$@")
773 }
774
775 add_host_ldflags(){
776     append host_ldflags $($host_ldflags_filter "$@")
777 }
778
779 add_compat(){
780     append compat_objs $1
781     shift
782     map 'add_cppflags -D$v' "$@"
783 }
784
785 check_cmd(){
786     log "$@"
787     "$@" >> $logfile 2>&1
788 }
789
790 check_stat(){
791     log check_stat "$@"
792     stat "$1" >> $logfile 2>&1
793 }
794
795 cc_o(){
796     eval printf '%s\\n' $CC_O
797 }
798
799 cc_e(){
800     eval printf '%s\\n' $CC_E
801 }
802
803 check_cc(){
804     log check_cc "$@"
805     cat > $TMPC
806     log_file $TMPC
807     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
808 }
809
810 check_cxx(){
811     log check_cxx "$@"
812     cat > $TMPCPP
813     log_file $TMPCPP
814     check_cmd $cxx $CPPFLAGS $CFLAGS $CXXFLAGS "$@" $CXX_C -o $TMPO $TMPCPP
815 }
816
817 check_oc(){
818     log check_oc "$@"
819     cat > $TMPM
820     log_file $TMPM
821     check_cmd $cc -Werror=missing-prototypes $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPM
822 }
823
824 check_cpp(){
825     log check_cpp "$@"
826     cat > $TMPC
827     log_file $TMPC
828     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
829 }
830
831 as_o(){
832     eval printf '%s\\n' $AS_O
833 }
834
835 check_as(){
836     log check_as "$@"
837     cat > $TMPS
838     log_file $TMPS
839     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
840 }
841
842 check_inline_asm(){
843     log check_inline_asm "$@"
844     name="$1"
845     code="$2"
846     shift 2
847     disable $name
848     check_cc "$@" <<EOF && enable $name
849 void foo(void){ __asm__ volatile($code); }
850 EOF
851 }
852
853 check_insn(){
854     log check_insn "$@"
855     check_inline_asm ${1}_inline "\"$2\""
856     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
857 }
858
859 check_yasm(){
860     log check_yasm "$@"
861     echo "$1" > $TMPS
862     log_file $TMPS
863     shift 1
864     check_cmd $yasmexe $YASMFLAGS -Werror "$@" -o $TMPO $TMPS
865 }
866
867 ld_o(){
868     eval printf '%s\\n' $LD_O
869 }
870
871 check_ld(){
872     log check_ld "$@"
873     type=$1
874     shift 1
875     flags=$(filter_out '-l*|*.so' $@)
876     libs=$(filter '-l*|*.so' $@)
877     check_$type $($cflags_filter $flags) || return
878     flags=$($ldflags_filter $flags)
879     libs=$($ldflags_filter $libs)
880     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
881 }
882
883 print_include(){
884     hdr=$1
885     test "${hdr%.h}" = "${hdr}" &&
886         echo "#include $hdr"    ||
887         echo "#include <$hdr>"
888 }
889
890 check_code(){
891     log check_code "$@"
892     check=$1
893     headers=$2
894     code=$3
895     shift 3
896     {
897         for hdr in $headers; do
898             print_include $hdr
899         done
900         echo "int main(void) { $code; return 0; }"
901     } | check_$check "$@"
902 }
903
904 check_cppflags(){
905     log check_cppflags "$@"
906     check_cc "$@" <<EOF && append CPPFLAGS "$@"
907 int x;
908 EOF
909 }
910
911 test_cflags(){
912     log test_cflags "$@"
913     set -- $($cflags_filter "$@")
914     check_cc "$@" <<EOF
915 int x;
916 EOF
917 }
918
919 check_cflags(){
920     log check_cflags "$@"
921     test_cflags "$@" && add_cflags "$@"
922 }
923
924 check_cxxflags(){
925     log check_cxxflags "$@"
926     set -- $($cflags_filter "$@")
927     check_cxx "$@" <<EOF && append CXXFLAGS "$@"
928 int x;
929 EOF
930 }
931
932 test_ldflags(){
933     log test_ldflags "$@"
934     check_ld "cc" "$@" <<EOF
935 int main(void){ return 0; }
936 EOF
937 }
938
939 check_ldflags(){
940     log check_ldflags "$@"
941     test_ldflags "$@" && add_ldflags "$@"
942 }
943
944 test_stripflags(){
945     log test_stripflags "$@"
946     # call check_cc to get a fresh TMPO
947     check_cc <<EOF
948 int main(void) { return 0; }
949 EOF
950     check_cmd $strip $ASMSTRIPFLAGS "$@" $TMPO
951 }
952
953 check_stripflags(){
954     log check_stripflags "$@"
955     test_stripflags "$@" && add_stripflags "$@"
956 }
957
958 check_header(){
959     log check_header "$@"
960     header=$1
961     shift
962     disable_safe $header
963     check_cpp "$@" <<EOF && enable_safe $header
964 #include <$header>
965 int x;
966 EOF
967 }
968
969 check_header_oc(){
970     log check_header_oc "$@"
971     rm -f -- "$TMPO"
972     header=$1
973     shift
974     disable_safe $header
975     {
976        echo "#include <$header>"
977        echo "int main(void) { return 0; }"
978     } | check_oc && check_stat "$TMPO" && enable_safe $headers
979 }
980
981 check_func(){
982     log check_func "$@"
983     func=$1
984     shift
985     disable $func
986     check_ld "cc" "$@" <<EOF && enable $func
987 extern int $func();
988 int main(void){ $func(); }
989 EOF
990 }
991
992 check_mathfunc(){
993     log check_mathfunc "$@"
994     func=$1
995     narg=$2
996     shift 2
997     test $narg = 2 && args="f, g" || args="f"
998     disable $func
999     check_ld "cc" "$@" <<EOF && enable $func
1000 #include <math.h>
1001 float foo(float f, float g) { return $func($args); }
1002 int main(void){ return (int) foo; }
1003 EOF
1004 }
1005
1006 check_func_headers(){
1007     log check_func_headers "$@"
1008     headers=$1
1009     funcs=$2
1010     shift 2
1011     {
1012         for hdr in $headers; do
1013             print_include $hdr
1014         done
1015         for func in $funcs; do
1016             echo "long check_$func(void) { return (long) $func; }"
1017         done
1018         echo "int main(void) { return 0; }"
1019     } | check_ld "cc" "$@" && enable $funcs && enable_safe $headers
1020 }
1021
1022 check_class_headers_cpp(){
1023     log check_class_headers_cpp "$@"
1024     headers=$1
1025     classes=$2
1026     shift 2
1027     {
1028         for hdr in $headers; do
1029             echo "#include <$hdr>"
1030         done
1031         echo "int main(void) { "
1032         i=1
1033         for class in $classes; do
1034             echo "$class obj$i;"
1035             i=$(expr $i + 1)
1036         done
1037         echo "return 0; }"
1038     } | check_ld "cxx" "$@" && enable $funcs && enable_safe $headers
1039 }
1040
1041 check_cpp_condition(){
1042     log check_cpp_condition "$@"
1043     header=$1
1044     condition=$2
1045     shift 2
1046     check_cpp "$@" <<EOF
1047 #include <$header>
1048 #if !($condition)
1049 #error "unsatisfied condition: $condition"
1050 #endif
1051 EOF
1052 }
1053
1054 check_lib(){
1055     log check_lib "$@"
1056     header="$1"
1057     func="$2"
1058     shift 2
1059     check_header $header && check_func $func "$@" && add_extralibs "$@"
1060 }
1061
1062 check_lib2(){
1063     log check_lib2 "$@"
1064     headers="$1"
1065     funcs="$2"
1066     shift 2
1067     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
1068 }
1069
1070 check_lib_cpp(){
1071     log check_lib_cpp "$@"
1072     headers="$1"
1073     classes="$2"
1074     shift 2
1075     check_class_headers_cpp "$headers" "$classes" "$@" && add_extralibs "$@"
1076 }
1077
1078 check_pkg_config(){
1079     log check_pkg_config "$@"
1080     pkgandversion="$1"
1081     pkg="${1%% *}"
1082     headers="$2"
1083     funcs="$3"
1084     shift 3
1085     check_cmd $pkg_config --exists --print-errors $pkgandversion || return
1086     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1087     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1088     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1089         set_safe ${pkg}_cflags $pkg_cflags   &&
1090         set_safe ${pkg}_libs   $pkg_libs
1091 }
1092
1093 check_exec(){
1094     check_ld "cc" "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1095 }
1096
1097 check_exec_crash(){
1098     code=$(cat)
1099
1100     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1101     # are safe but may not be available everywhere.  Thus we use
1102     # raise(SIGTERM) instead.  The check is run in a subshell so we
1103     # can redirect the "Terminated" message from the shell.  SIGBUS
1104     # is not defined by standard C so it is used conditionally.
1105
1106     (check_exec "$@") >> $logfile 2>&1 <<EOF
1107 #include <signal.h>
1108 static void sighandler(int sig){
1109     raise(SIGTERM);
1110 }
1111 int foo(void){
1112     $code
1113 }
1114 int (*func_ptr)(void) = foo;
1115 int main(void){
1116     signal(SIGILL, sighandler);
1117     signal(SIGFPE, sighandler);
1118     signal(SIGSEGV, sighandler);
1119 #ifdef SIGBUS
1120     signal(SIGBUS, sighandler);
1121 #endif
1122     return func_ptr();
1123 }
1124 EOF
1125 }
1126
1127 check_type(){
1128     log check_type "$@"
1129     headers=$1
1130     type=$2
1131     shift 2
1132     disable_safe "$type"
1133     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1134 }
1135
1136 check_struct(){
1137     log check_struct "$@"
1138     headers=$1
1139     struct=$2
1140     member=$3
1141     shift 3
1142     disable_safe "${struct}_${member}"
1143     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1144         enable_safe "${struct}_${member}"
1145 }
1146
1147 check_builtin(){
1148     log check_builtin "$@"
1149     name=$1
1150     headers=$2
1151     builtin=$3
1152     shift 3
1153     disable "$name"
1154     check_code ld "$headers" "$builtin" "cc" "$@" && enable "$name"
1155 }
1156
1157 check_compile_assert(){
1158     log check_compile_assert "$@"
1159     name=$1
1160     headers=$2
1161     condition=$3
1162     shift 3
1163     disable "$name"
1164     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1165 }
1166
1167 require(){
1168     name="$1"
1169     header="$2"
1170     func="$3"
1171     shift 3
1172     check_lib $header $func "$@" || die "ERROR: $name not found"
1173 }
1174
1175 require2(){
1176     name="$1"
1177     headers="$2"
1178     func="$3"
1179     shift 3
1180     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1181 }
1182
1183 require_cpp(){
1184     name="$1"
1185     headers="$2"
1186     classes="$3"
1187     shift 3
1188     check_lib_cpp "$headers" "$classes" "$@" || die "ERROR: $name not found"
1189 }
1190
1191 require_pkg_config(){
1192     pkg="$1"
1193     check_pkg_config "$@" || die "ERROR: $pkg not found"
1194     add_cflags    $(get_safe ${pkg}_cflags)
1195     add_extralibs $(get_safe ${pkg}_libs)
1196 }
1197
1198 require_libfreetype(){
1199     log require_libfreetype "$@"
1200     pkg="freetype2"
1201     check_cmd $pkg_config --exists --print-errors $pkg \
1202       || die "ERROR: $pkg not found"
1203     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1204     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1205     {
1206         echo "#include <ft2build.h>"
1207         echo "#include FT_FREETYPE_H"
1208         echo "long check_func(void) { return (long) FT_Init_FreeType; }"
1209         echo "int main(void) { return 0; }"
1210     } | check_ld "cc" $pkg_cflags $pkg_libs \
1211       && set_safe ${pkg}_cflags $pkg_cflags \
1212       && set_safe ${pkg}_libs   $pkg_libs \
1213       || die "ERROR: $pkg not found"
1214     add_cflags    $(get_safe ${pkg}_cflags)
1215     add_extralibs $(get_safe ${pkg}_libs)
1216 }
1217
1218 hostcc_e(){
1219     eval printf '%s\\n' $HOSTCC_E
1220 }
1221
1222 hostcc_o(){
1223     eval printf '%s\\n' $HOSTCC_O
1224 }
1225
1226 check_host_cc(){
1227     log check_host_cc "$@"
1228     cat > $TMPC
1229     log_file $TMPC
1230     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1231 }
1232
1233 check_host_cpp(){
1234     log check_host_cpp "$@"
1235     cat > $TMPC
1236     log_file $TMPC
1237     check_cmd $host_cc $HOSTCPPFLAGS $HOSTCFLAGS "$@" $(hostcc_e $TMPO) $TMPC
1238 }
1239
1240 check_host_cppflags(){
1241     log check_host_cppflags "$@"
1242     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1243 int x;
1244 EOF
1245 }
1246
1247 check_host_cflags(){
1248     log check_host_cflags "$@"
1249     set -- $($host_cflags_filter "$@")
1250     check_host_cc "$@" <<EOF && append host_cflags "$@"
1251 int x;
1252 EOF
1253 }
1254
1255 check_host_cpp_condition(){
1256     log check_host_cpp_condition "$@"
1257     header=$1
1258     condition=$2
1259     shift 2
1260     check_host_cpp "$@" <<EOF
1261 #include <$header>
1262 #if !($condition)
1263 #error "unsatisfied condition: $condition"
1264 #endif
1265 EOF
1266 }
1267
1268 apply(){
1269     file=$1
1270     shift
1271     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1272 }
1273
1274 cp_if_changed(){
1275     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1276     mkdir -p "$(dirname $2)"
1277     $cp_f "$1" "$2"
1278 }
1279
1280 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1281 # system-dependent things.
1282
1283 COMPONENT_LIST="
1284     bsfs
1285     decoders
1286     demuxers
1287     encoders
1288     filters
1289     hwaccels
1290     indevs
1291     muxers
1292     outdevs
1293     parsers
1294     protocols
1295 "
1296
1297 EXAMPLE_LIST="
1298     avio_reading_example
1299     decoding_encoding_example
1300     demuxing_decoding_example
1301     filter_audio_example
1302     filtering_audio_example
1303     filtering_video_example
1304     metadata_example
1305     muxing_example
1306     remuxing_example
1307     resampling_audio_example
1308     scaling_video_example
1309     transcode_aac_example
1310     transcoding_example
1311 "
1312
1313 EXTERNAL_LIBRARY_LIST="
1314     avisynth
1315     bzlib
1316     crystalhd
1317     decklink
1318     frei0r
1319     gnutls
1320     iconv
1321     ladspa
1322     libaacplus
1323     libass
1324     libbluray
1325     libbs2b
1326     libcaca
1327     libcdio
1328     libcelt
1329     libdc1394
1330     libfaac
1331     libfdk_aac
1332     libflite
1333     libfontconfig
1334     libfreetype
1335     libgme
1336     libgsm
1337     libiec61883
1338     libilbc
1339     libmodplug
1340     libmp3lame
1341     libnut
1342     libopencore_amrnb
1343     libopencore_amrwb
1344     libopencv
1345     libopenjpeg
1346     libopus
1347     libpulse
1348     libquvi
1349     librtmp
1350     libschroedinger
1351     libshine
1352     libsoxr
1353     libspeex
1354     libssh
1355     libstagefright_h264
1356     libtheora
1357     libtwolame
1358     libutvideo
1359     libv4l2
1360     libvidstab
1361     libvo_aacenc
1362     libvo_amrwbenc
1363     libvorbis
1364     libvpx
1365     libwavpack
1366     libwebp
1367     libx264
1368     libx265
1369     libxavs
1370     libxvid
1371     libzmq
1372     libzvbi
1373     openal
1374     opencl
1375     opengl
1376     openssl
1377     x11grab
1378     xlib
1379     zlib
1380 "
1381
1382 DOCUMENT_LIST="
1383     doc
1384     htmlpages
1385     manpages
1386     podpages
1387     txtpages
1388 "
1389
1390 FEATURE_LIST="
1391     ftrapv
1392     gray
1393     hardcoded_tables
1394     runtime_cpudetect
1395     safe_bitstream_reader
1396     shared
1397     small
1398     sram
1399     static
1400     swscale_alpha
1401 "
1402
1403 HWACCEL_LIST="
1404     dxva2
1405     vaapi
1406     vda
1407     vdpau
1408     xvmc
1409 "
1410
1411 LIBRARY_LIST="
1412     avcodec
1413     avdevice
1414     avfilter
1415     avformat
1416     avresample
1417     avutil
1418     postproc
1419     swresample
1420     swscale
1421 "
1422
1423 LICENSE_LIST="
1424     gpl
1425     nonfree
1426     version3
1427 "
1428
1429 PROGRAM_LIST="
1430     ffplay
1431     ffprobe
1432     ffserver
1433     ffmpeg
1434 "
1435
1436 SUBSYSTEM_LIST="
1437     dct
1438     dwt
1439     error_resilience
1440     fast_unaligned
1441     fft
1442     lsp
1443     lzo
1444     mdct
1445     network
1446     rdft
1447 "
1448
1449 CONFIG_LIST="
1450     $COMPONENT_LIST
1451     $DOCUMENT_LIST
1452     $EXAMPLE_LIST
1453     $EXTERNAL_LIBRARY_LIST
1454     $FEATURE_LIST
1455     $HWACCEL_LIST
1456     $LICENSE_LIST
1457     $LIBRARY_LIST
1458     $PROGRAM_LIST
1459     $SUBSYSTEM_LIST
1460     fontconfig
1461     incompatible_libav_abi
1462     memalign_hack
1463     memory_poisoning
1464     neon_clobber_test
1465     pic
1466     pod2man
1467     raise_major
1468     thumb
1469     xmm_clobber_test
1470 "
1471
1472 THREADS_LIST="
1473     pthreads
1474     os2threads
1475     w32threads
1476 "
1477
1478 ATOMICS_LIST="
1479     atomics_gcc
1480     atomics_suncc
1481     atomics_win32
1482 "
1483
1484 ARCH_LIST="
1485     aarch64
1486     alpha
1487     arm
1488     avr32
1489     avr32_ap
1490     avr32_uc
1491     bfin
1492     ia64
1493     m68k
1494     mips
1495     mips64
1496     parisc
1497     ppc
1498     ppc64
1499     s390
1500     sh4
1501     sparc
1502     sparc64
1503     tilegx
1504     tilepro
1505     tomi
1506     x86
1507     x86_32
1508     x86_64
1509 "
1510
1511 ARCH_EXT_LIST_ARM="
1512     armv5te
1513     armv6
1514     armv6t2
1515     armv8
1516     neon
1517     vfp
1518     vfpv3
1519 "
1520
1521 ARCH_EXT_LIST_MIPS="
1522     mipsfpu
1523     mips32r2
1524     mipsdspr1
1525     mipsdspr2
1526 "
1527
1528 ARCH_EXT_LIST_X86_SIMD="
1529     amd3dnow
1530     amd3dnowext
1531     avx
1532     avx2
1533     fma3
1534     fma4
1535     mmx
1536     mmxext
1537     sse
1538     sse2
1539     sse3
1540     sse4
1541     sse42
1542     ssse3
1543     xop
1544 "
1545
1546 ARCH_EXT_LIST_PPC="
1547     altivec
1548     dcbzl
1549     ldbrx
1550     ppc4xx
1551     vsx
1552 "
1553
1554 ARCH_EXT_LIST_X86="
1555     $ARCH_EXT_LIST_X86_SIMD
1556     cpunop
1557     i686
1558 "
1559
1560 ARCH_EXT_LIST="
1561     $ARCH_EXT_LIST_ARM
1562     $ARCH_EXT_LIST_PPC
1563     $ARCH_EXT_LIST_X86
1564     $ARCH_EXT_LIST_MIPS
1565     loongson
1566 "
1567
1568 ARCH_FEATURES="
1569     aligned_stack
1570     fast_64bit
1571     fast_clz
1572     fast_cmov
1573     local_aligned_8
1574     local_aligned_16
1575     local_aligned_32
1576 "
1577
1578 BUILTIN_LIST="
1579     atomic_cas_ptr
1580     machine_rw_barrier
1581     MemoryBarrier
1582     mm_empty
1583     rdtsc
1584     sarestart
1585     sync_val_compare_and_swap
1586 "
1587 HAVE_LIST_CMDLINE="
1588     inline_asm
1589     symver
1590     yasm
1591 "
1592
1593 HAVE_LIST_PUB="
1594     bigendian
1595     fast_unaligned
1596     incompatible_libav_abi
1597 "
1598
1599 HEADERS_LIST="
1600     alsa_asoundlib_h
1601     altivec_h
1602     arpa_inet_h
1603     asm_types_h
1604     cdio_paranoia_h
1605     cdio_paranoia_paranoia_h
1606     CL_cl_h
1607     dev_bktr_ioctl_bt848_h
1608     dev_bktr_ioctl_meteor_h
1609     dev_ic_bt8xx_h
1610     dev_video_bktr_ioctl_bt848_h
1611     dev_video_meteor_ioctl_meteor_h
1612     direct_h
1613     dlfcn_h
1614     dxva_h
1615     ES2_gl_h
1616     gsm_h
1617     io_h
1618     mach_mach_time_h
1619     machine_ioctl_bt848_h
1620     machine_ioctl_meteor_h
1621     malloc_h
1622     openjpeg_1_5_openjpeg_h
1623     OpenGL_gl3_h
1624     poll_h
1625     sndio_h
1626     soundcard_h
1627     sys_mman_h
1628     sys_param_h
1629     sys_resource_h
1630     sys_select_h
1631     sys_soundcard_h
1632     sys_time_h
1633     sys_un_h
1634     sys_videoio_h
1635     termios_h
1636     unistd_h
1637     windows_h
1638     winsock2_h
1639 "
1640
1641 MATH_FUNCS="
1642     atanf
1643     atan2f
1644     cbrt
1645     cbrtf
1646     cosf
1647     exp2
1648     exp2f
1649     expf
1650     fminf
1651     isinf
1652     isnan
1653     ldexpf
1654     llrint
1655     llrintf
1656     log2
1657     log2f
1658     log10f
1659     lrint
1660     lrintf
1661     powf
1662     rint
1663     round
1664     roundf
1665     sinf
1666     trunc
1667     truncf
1668 "
1669
1670 SYSTEM_FUNCS="
1671     access
1672     aligned_malloc
1673     clock_gettime
1674     closesocket
1675     CommandLineToArgvW
1676     CoTaskMemFree
1677     CryptGenRandom
1678     dlopen
1679     fcntl
1680     flt_lim
1681     fork
1682     getaddrinfo
1683     gethrtime
1684     getopt
1685     GetProcessAffinityMask
1686     GetProcessMemoryInfo
1687     GetProcessTimes
1688     getrusage
1689     getservbyport
1690     GetSystemTimeAsFileTime
1691     gettimeofday
1692     glob
1693     glXGetProcAddress
1694     inet_aton
1695     isatty
1696     jack_port_get_latency_range
1697     kbhit
1698     localtime_r
1699     lzo1x_999_compress
1700     mach_absolute_time
1701     MapViewOfFile
1702     memalign
1703     mkstemp
1704     mmap
1705     mprotect
1706     nanosleep
1707     PeekNamedPipe
1708     posix_memalign
1709     pthread_cancel
1710     sched_getaffinity
1711     SetConsoleTextAttribute
1712     setmode
1713     setrlimit
1714     Sleep
1715     strerror_r
1716     sysconf
1717     sysctl
1718     usleep
1719     VirtualAlloc
1720     wglGetProcAddress
1721 "
1722
1723 TOOLCHAIN_FEATURES="
1724     as_dn_directive
1725     as_func
1726     asm_mod_q
1727     attribute_may_alias
1728     attribute_packed
1729     ebp_available
1730     ebx_available
1731     gnu_as
1732     gnu_windres
1733     ibm_asm
1734     inline_asm_labels
1735     inline_asm_nonlocal_labels
1736     inline_asm_direct_symbol_refs
1737     pragma_deprecated
1738     rsync_contimeout
1739     symver_asm_label
1740     symver_gnu_asm
1741     vfp_args
1742     xform_asm
1743     xmm_clobbers
1744 "
1745
1746 TYPES_LIST="
1747     socklen_t
1748     struct_addrinfo
1749     struct_group_source_req
1750     struct_ip_mreq_source
1751     struct_ipv6_mreq
1752     struct_pollfd
1753     struct_rusage_ru_maxrss
1754     struct_sctp_event_subscribe
1755     struct_sockaddr_in6
1756     struct_sockaddr_sa_len
1757     struct_sockaddr_storage
1758     struct_stat_st_mtim_tv_nsec
1759     struct_v4l2_frmivalenum_discrete
1760 "
1761
1762 HAVE_LIST="
1763     $ARCH_EXT_LIST
1764     $(add_suffix _external $ARCH_EXT_LIST)
1765     $(add_suffix _inline   $ARCH_EXT_LIST)
1766     $ARCH_FEATURES
1767     $ATOMICS_LIST
1768     $BUILTIN_LIST
1769     $HAVE_LIST_CMDLINE
1770     $HAVE_LIST_PUB
1771     $HEADERS_LIST
1772     $MATH_FUNCS
1773     $SYSTEM_FUNCS
1774     $THREADS_LIST
1775     $TOOLCHAIN_FEATURES
1776     $TYPES_LIST
1777     atomics_native
1778     dos_paths
1779     dxva2api_cobj
1780     dxva2_lib
1781     libc_msvcrt
1782     libdc1394_1
1783     libdc1394_2
1784     makeinfo
1785     perl
1786     pod2man
1787     sdl
1788     texi2html
1789     threads
1790     vdpau_x11
1791     xlib
1792 "
1793
1794 # options emitted with CONFIG_ prefix but not available on the command line
1795 CONFIG_EXTRA="
1796     aandcttables
1797     ac3dsp
1798     audio_frame_queue
1799     cabac
1800     dsputil
1801     exif
1802     frame_thread_encoder
1803     gcrypt
1804     golomb
1805     gplv3
1806     h263dsp
1807     h264chroma
1808     h264dsp
1809     h264pred
1810     h264qpel
1811     hpeldsp
1812     huffman
1813     huffyuvdsp
1814     huffyuvencdsp
1815     intrax8
1816     lgplv3
1817     llauddsp
1818     llviddsp
1819     lpc
1820     mpegaudio
1821     mpegaudiodsp
1822     mpegvideo
1823     mpegvideoenc
1824     nettle
1825     qpeldsp
1826     rangecoder
1827     riffdec
1828     riffenc
1829     rtpdec
1830     rtpenc_chain
1831     sinewin
1832     tpeldsp
1833     videodsp
1834     vp3dsp
1835 "
1836
1837 CMDLINE_SELECT="
1838     $ARCH_EXT_LIST
1839     $CONFIG_LIST
1840     $HAVE_LIST_CMDLINE
1841     $THREADS_LIST
1842     asm
1843     cross_compile
1844     debug
1845     extra_warnings
1846     logging
1847     lto
1848     optimizations
1849     rpath
1850     stripping
1851 "
1852
1853 PATHS_LIST="
1854     bindir
1855     datadir
1856     docdir
1857     incdir
1858     libdir
1859     mandir
1860     prefix
1861     shlibdir
1862 "
1863
1864 CMDLINE_SET="
1865     $PATHS_LIST
1866     ar
1867     arch
1868     as
1869     assert_level
1870     build_suffix
1871     cc
1872     cpu
1873     cross_prefix
1874     cxx
1875     dep_cc
1876     extra_version
1877     gas
1878     host_cc
1879     host_cflags
1880     host_ld
1881     host_ldflags
1882     host_libs
1883     host_os
1884     install
1885     ld
1886     logfile
1887     malloc_prefix
1888     nm
1889     optflags
1890     pkg_config
1891     pkg_config_flags
1892     progs_suffix
1893     random_seed
1894     ranlib
1895     samples
1896     strip
1897     sws_max_filter_size
1898     sysinclude
1899     sysroot
1900     target_exec
1901     target_os
1902     target_path
1903     target_samples
1904     tempprefix
1905     toolchain
1906     valgrind
1907     yasmexe
1908 "
1909
1910 CMDLINE_APPEND="
1911     extra_cflags
1912     extra_cxxflags
1913     host_cppflags
1914 "
1915
1916 # code dependency declarations
1917
1918 # architecture extensions
1919
1920 armv5te_deps="arm"
1921 armv6_deps="arm"
1922 armv6t2_deps="arm"
1923 armv8_deps="aarch64"
1924 neon_deps_any="aarch64 arm"
1925 vfp_deps_any="aarch64 arm"
1926 vfpv3_deps="vfp"
1927
1928 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1929
1930 mipsfpu_deps="mips"
1931 mips32r2_deps="mips"
1932 mipsdspr1_deps="mips"
1933 mipsdspr2_deps="mips"
1934
1935 altivec_deps="ppc"
1936 ppc4xx_deps="ppc"
1937 vsx_deps="ppc"
1938
1939 cpunop_deps="i686"
1940 x86_64_select="i686"
1941 x86_64_suggest="fast_cmov"
1942
1943 amd3dnow_deps="mmx"
1944 amd3dnowext_deps="amd3dnow"
1945 i686_deps="x86"
1946 mmx_deps="x86"
1947 mmxext_deps="mmx"
1948 sse_deps="mmxext"
1949 sse2_deps="sse"
1950 sse3_deps="sse2"
1951 ssse3_deps="sse3"
1952 sse4_deps="ssse3"
1953 sse42_deps="sse4"
1954 avx_deps="sse42"
1955 xop_deps="avx"
1956 fma3_deps="avx"
1957 fma4_deps="avx"
1958 avx2_deps="avx"
1959
1960 mmx_external_deps="yasm"
1961 mmx_inline_deps="inline_asm"
1962 mmx_suggest="mmx_external mmx_inline"
1963
1964 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1965     eval dep=\$${ext}_deps
1966     eval ${ext}_external_deps='"${dep}_external"'
1967     eval ${ext}_inline_deps='"${dep}_inline"'
1968     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1969 done
1970
1971 aligned_stack_if_any="aarch64 ppc x86"
1972 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1973 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1974 fast_unaligned_if_any="aarch64 ppc x86"
1975
1976 need_memalign="altivec neon sse"
1977
1978 # system capabilities
1979
1980 symver_if_any="symver_asm_label symver_gnu_asm"
1981
1982 # threading support
1983 atomics_gcc_if="sync_val_compare_and_swap"
1984 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1985 atomics_win32_if="MemoryBarrier"
1986 atomics_native_if_any="$ATOMICS_LIST"
1987 w32threads_deps="atomics_native"
1988 threads_if_any="$THREADS_LIST"
1989
1990 # subsystems
1991 dct_select="rdft"
1992 error_resilience_select="dsputil"
1993 frame_thread_encoder_deps="encoders threads"
1994 mdct_select="fft"
1995 rdft_select="fft"
1996 mpegaudio_select="mpegaudiodsp"
1997 mpegaudiodsp_select="dct"
1998 mpegvideo_select="dsputil h264chroma hpeldsp videodsp"
1999 mpegvideoenc_select="dsputil mpegvideo qpeldsp"
2000
2001 # decoders / encoders
2002 aac_decoder_select="mdct sinewin"
2003 aac_encoder_select="audio_frame_queue mdct sinewin"
2004 aac_latm_decoder_select="aac_decoder aac_latm_parser"
2005 ac3_decoder_select="mdct ac3dsp ac3_parser dsputil"
2006 ac3_fixed_decoder_select="mdct ac3dsp ac3_parser dsputil"
2007 ac3_encoder_select="mdct ac3dsp dsputil"
2008 ac3_fixed_encoder_select="mdct ac3dsp dsputil"
2009 aic_decoder_select="dsputil golomb"
2010 alac_encoder_select="lpc"
2011 als_decoder_select="dsputil"
2012 amrnb_decoder_select="lsp"
2013 amrwb_decoder_select="lsp"
2014 amv_decoder_select="sp5x_decoder exif"
2015 amv_encoder_select="aandcttables"
2016 ape_decoder_select="dsputil llauddsp"
2017 asv1_decoder_select="dsputil"
2018 asv1_encoder_select="dsputil"
2019 asv2_decoder_select="dsputil"
2020 asv2_encoder_select="dsputil"
2021 atrac1_decoder_select="mdct sinewin"
2022 atrac3_decoder_select="mdct"
2023 atrac3p_decoder_select="mdct sinewin"
2024 avrn_decoder_select="exif"
2025 bink_decoder_select="dsputil hpeldsp"
2026 binkaudio_dct_decoder_select="mdct rdft dct sinewin"
2027 binkaudio_rdft_decoder_select="mdct rdft sinewin"
2028 cavs_decoder_select="dsputil golomb h264chroma qpeldsp videodsp"
2029 cllc_decoder_select="dsputil"
2030 comfortnoise_encoder_select="lpc"
2031 cook_decoder_select="dsputil mdct sinewin"
2032 cscd_decoder_select="lzo"
2033 cscd_decoder_suggest="zlib"
2034 dca_decoder_select="mdct"
2035 dirac_decoder_select="dsputil dwt golomb videodsp"
2036 dnxhd_decoder_select="dsputil"
2037 dnxhd_encoder_select="aandcttables dsputil mpegvideoenc"
2038 dvvideo_decoder_select="dsputil"
2039 dvvideo_encoder_select="dsputil"
2040 dxa_decoder_select="zlib"
2041 eac3_decoder_select="ac3_decoder"
2042 eac3_encoder_select="ac3_encoder"
2043 eamad_decoder_select="aandcttables dsputil mpegvideo"
2044 eatgq_decoder_select="aandcttables"
2045 eatqi_decoder_select="aandcttables dsputil error_resilience mpegvideo"
2046 exr_decoder_select="zlib"
2047 ffv1_decoder_select="golomb rangecoder"
2048 ffv1_encoder_select="rangecoder"
2049 ffvhuff_decoder_select="huffyuv_decoder"
2050 ffvhuff_encoder_select="huffyuv_encoder"
2051 fic_decoder_select="golomb"
2052 flac_decoder_select="golomb"
2053 flac_encoder_select="dsputil golomb lpc"
2054 flashsv_decoder_select="zlib"
2055 flashsv_encoder_select="zlib"
2056 flashsv2_encoder_select="zlib"
2057 flashsv2_decoder_select="zlib"
2058 flv_decoder_select="h263_decoder"
2059 flv_encoder_select="h263_encoder"
2060 fourxm_decoder_select="dsputil"
2061 fraps_decoder_select="dsputil huffman"
2062 g2m_decoder_select="dsputil zlib"
2063 g729_decoder_select="dsputil"
2064 h261_decoder_select="error_resilience mpegvideo"
2065 h261_encoder_select="aandcttables mpegvideoenc"
2066 h263_decoder_select="error_resilience h263_parser h263dsp mpegvideo qpeldsp"
2067 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
2068 h263i_decoder_select="h263_decoder"
2069 h263p_encoder_select="h263_encoder"
2070 h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel videodsp"
2071 h264_decoder_suggest="error_resilience"
2072 hevc_decoder_select="cabac dsputil golomb videodsp"
2073 huffyuv_decoder_select="dsputil huffyuvdsp llviddsp"
2074 huffyuv_encoder_select="dsputil huffman huffyuvencdsp llviddsp"
2075 iac_decoder_select="imc_decoder"
2076 imc_decoder_select="dsputil fft mdct sinewin"
2077 indeo3_decoder_select="hpeldsp"
2078 interplay_video_decoder_select="hpeldsp"
2079 jpegls_decoder_select="golomb mjpeg_decoder"
2080 jpegls_encoder_select="golomb"
2081 jv_decoder_select="dsputil"
2082 lagarith_decoder_select="huffyuvdsp"
2083 ljpeg_encoder_select="aandcttables mpegvideoenc"
2084 loco_decoder_select="golomb"
2085 mdec_decoder_select="dsputil error_resilience mpegvideo"
2086 metasound_decoder_select="lsp mdct sinewin"
2087 mimic_decoder_select="dsputil hpeldsp"
2088 mjpeg_decoder_select="dsputil hpeldsp exif"
2089 mjpeg_encoder_select="aandcttables mpegvideoenc"
2090 mjpegb_decoder_select="mjpeg_decoder"
2091 mlp_decoder_select="mlp_parser"
2092 motionpixels_decoder_select="dsputil"
2093 mp1_decoder_select="mpegaudio"
2094 mp1float_decoder_select="mpegaudio"
2095 mp2_decoder_select="mpegaudio"
2096 mp2float_decoder_select="mpegaudio"
2097 mp3_decoder_select="mpegaudio"
2098 mp3adu_decoder_select="mpegaudio"
2099 mp3adufloat_decoder_select="mpegaudio"
2100 mp3float_decoder_select="mpegaudio"
2101 mp3on4_decoder_select="mpegaudio"
2102 mp3on4float_decoder_select="mpegaudio"
2103 mpc7_decoder_select="dsputil mpegaudiodsp"
2104 mpc8_decoder_select="mpegaudiodsp"
2105 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2106 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2107 mpeg1video_decoder_select="error_resilience mpegvideo"
2108 mpeg1video_encoder_select="aandcttables mpegvideoenc h263dsp"
2109 mpeg2video_decoder_select="error_resilience mpegvideo"
2110 mpeg2video_encoder_select="aandcttables mpegvideoenc h263dsp"
2111 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2112 mpeg4_encoder_select="h263_encoder"
2113 msmpeg4v1_decoder_select="h263_decoder"
2114 msmpeg4v2_decoder_select="h263_decoder"
2115 msmpeg4v2_encoder_select="h263_encoder"
2116 msmpeg4v3_decoder_select="h263_decoder"
2117 msmpeg4v3_encoder_select="h263_encoder"
2118 mss2_decoder_select="error_resilience qpeldsp vc1_decoder"
2119 mxpeg_decoder_select="mjpeg_decoder"
2120 nellymoser_decoder_select="mdct sinewin"
2121 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2122 nuv_decoder_select="dsputil lzo"
2123 on2avc_decoder_select="mdct"
2124 opus_decoder_deps="swresample"
2125 png_decoder_select="zlib"
2126 png_encoder_select="huffyuvencdsp zlib"
2127 prores_decoder_select="dsputil"
2128 prores_encoder_select="dsputil"
2129 qcelp_decoder_select="lsp"
2130 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2131 ra_144_encoder_select="audio_frame_queue lpc"
2132 ralf_decoder_select="golomb"
2133 rawvideo_decoder_select="dsputil"
2134 rtjpeg_decoder_select="dsputil"
2135 rv10_decoder_select="error_resilience h263_decoder h263dsp"
2136 rv10_encoder_select="h263_encoder"
2137 rv20_decoder_select="error_resilience h263_decoder h263dsp"
2138 rv20_encoder_select="h263_encoder"
2139 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpegvideo videodsp"
2140 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpegvideo videodsp"
2141 shorten_decoder_select="golomb"
2142 sipr_decoder_select="lsp"
2143 snow_decoder_select="dsputil dwt h264qpel hpeldsp rangecoder"
2144 snow_encoder_select="aandcttables dsputil dwt h264qpel hpeldsp mpegvideoenc rangecoder"
2145 sonic_decoder_select="golomb rangecoder"
2146 sonic_encoder_select="golomb rangecoder"
2147 sonic_ls_encoder_select="golomb rangecoder"
2148 sp5x_decoder_select="mjpeg_decoder"
2149 svq1_decoder_select="hpeldsp"
2150 svq1_encoder_select="aandcttables dsputil hpeldsp mpegvideoenc"
2151 svq3_decoder_select="h264_decoder hpeldsp tpeldsp"
2152 svq3_decoder_suggest="zlib"
2153 tak_decoder_select="dsputil"
2154 theora_decoder_select="vp3_decoder"
2155 thp_decoder_select="mjpeg_decoder"
2156 tiff_decoder_suggest="zlib"
2157 tiff_encoder_suggest="zlib"
2158 truehd_decoder_select="mlp_parser"
2159 truemotion2_decoder_select="dsputil"
2160 truespeech_decoder_select="dsputil"
2161 tscc_decoder_select="zlib"
2162 twinvq_decoder_select="mdct lsp sinewin"
2163 utvideo_decoder_select="dsputil"
2164 utvideo_encoder_select="dsputil huffman huffyuvencdsp"
2165 vble_decoder_select="huffyuvdsp"
2166 vc1_decoder_select="error_resilience h263_decoder h264chroma h264qpel intrax8 qpeldsp"
2167 vc1image_decoder_select="vc1_decoder"
2168 vorbis_decoder_select="mdct"
2169 vorbis_encoder_select="mdct"
2170 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2171 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp"
2172 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp"
2173 vp6a_decoder_select="vp6_decoder"
2174 vp6f_decoder_select="vp6_decoder"
2175 vp7_decoder_select="h264pred videodsp"
2176 vp8_decoder_select="h264pred videodsp"
2177 vp9_decoder_select="videodsp vp9_parser"
2178 webp_decoder_select="vp8_decoder"
2179 wmalossless_decoder_select="llauddsp"
2180 wmapro_decoder_select="mdct sinewin"
2181 wmav1_decoder_select="mdct sinewin"
2182 wmav1_encoder_select="mdct sinewin"
2183 wmav2_decoder_select="mdct sinewin"
2184 wmav2_encoder_select="mdct sinewin"
2185 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2186 wmv1_decoder_select="h263_decoder"
2187 wmv1_encoder_select="h263_encoder"
2188 wmv2_decoder_select="h263_decoder intrax8 videodsp"
2189 wmv2_encoder_select="h263_encoder"
2190 wmv3_decoder_select="vc1_decoder"
2191 wmv3image_decoder_select="wmv3_decoder"
2192 zerocodec_decoder_select="zlib"
2193 zlib_decoder_select="zlib"
2194 zlib_encoder_select="zlib"
2195 zmbv_decoder_select="zlib"
2196 zmbv_encoder_select="zlib"
2197
2198 # hardware accelerators
2199 crystalhd_deps="libcrystalhd_libcrystalhd_if_h"
2200 dxva2_deps="dxva2api_h"
2201 vaapi_deps="va_va_h"
2202 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2203 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2204 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2205 xvmc_deps="X11_extensions_XvMClib_h"
2206
2207 h263_vaapi_hwaccel_deps="vaapi"
2208 h263_vaapi_hwaccel_select="h263_decoder"
2209 h263_vdpau_hwaccel_deps="vdpau"
2210 h263_vdpau_hwaccel_select="h263_decoder"
2211 h264_crystalhd_decoder_select="crystalhd h264_mp4toannexb_bsf h264_parser"
2212 h264_dxva2_hwaccel_deps="dxva2"
2213 h264_dxva2_hwaccel_select="h264_decoder"
2214 h264_vaapi_hwaccel_deps="vaapi"
2215 h264_vaapi_hwaccel_select="h264_decoder"
2216 h264_vda_decoder_deps="vda"
2217 h264_vda_decoder_select="h264_decoder"
2218 h264_vda_hwaccel_deps="vda"
2219 h264_vda_hwaccel_select="h264_decoder"
2220 h264_vda_old_hwaccel_deps="vda"
2221 h264_vda_old_hwaccel_select="h264_decoder"
2222 h264_vdpau_decoder_deps="vdpau"
2223 h264_vdpau_decoder_select="h264_decoder"
2224 h264_vdpau_hwaccel_deps="vdpau"
2225 h264_vdpau_hwaccel_select="h264_decoder"
2226 mpeg_vdpau_decoder_deps="vdpau"
2227 mpeg_vdpau_decoder_select="mpeg2video_decoder"
2228 mpeg_xvmc_hwaccel_deps="xvmc"
2229 mpeg_xvmc_hwaccel_select="mpeg2video_decoder"
2230 mpeg1_vdpau_decoder_deps="vdpau"
2231 mpeg1_vdpau_decoder_select="mpeg1video_decoder"
2232 mpeg1_vdpau_hwaccel_deps="vdpau"
2233 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2234 mpeg1_xvmc_hwaccel_deps="xvmc"
2235 mpeg1_xvmc_hwaccel_select="mpeg1video_decoder"
2236 mpeg2_crystalhd_decoder_select="crystalhd"
2237 mpeg2_dxva2_hwaccel_deps="dxva2"
2238 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2239 mpeg2_vaapi_hwaccel_deps="vaapi"
2240 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2241 mpeg2_vdpau_hwaccel_deps="vdpau"
2242 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2243 mpeg2_xvmc_hwaccel_deps="xvmc"
2244 mpeg2_xvmc_hwaccel_select="mpeg2video_decoder"
2245 mpeg4_crystalhd_decoder_select="crystalhd"
2246 mpeg4_vaapi_hwaccel_deps="vaapi"
2247 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2248 mpeg4_vdpau_decoder_deps="vdpau"
2249 mpeg4_vdpau_decoder_select="mpeg4_decoder"
2250 mpeg4_vdpau_hwaccel_deps="vdpau"
2251 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2252 msmpeg4_crystalhd_decoder_select="crystalhd"
2253 vc1_crystalhd_decoder_select="crystalhd"
2254 vc1_dxva2_hwaccel_deps="dxva2"
2255 vc1_dxva2_hwaccel_select="vc1_decoder"
2256 vc1_vaapi_hwaccel_deps="vaapi"
2257 vc1_vaapi_hwaccel_select="vc1_decoder"
2258 vc1_vdpau_decoder_deps="vdpau"
2259 vc1_vdpau_decoder_select="vc1_decoder"
2260 vc1_vdpau_hwaccel_deps="vdpau"
2261 vc1_vdpau_hwaccel_select="vc1_decoder"
2262 wmv3_crystalhd_decoder_select="crystalhd"
2263 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2264 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2265 wmv3_vdpau_decoder_select="vc1_vdpau_decoder"
2266 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2267
2268 # parsers
2269 h264_parser_select="h264_decoder"
2270 hevc_parser_select="hevc_decoder"
2271 mpegvideo_parser_select="error_resilience mpegvideo"
2272 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2273 vc1_parser_select="mpegvideo vc1_decoder"
2274
2275 # external libraries
2276 libaacplus_encoder_deps="libaacplus"
2277 libcelt_decoder_deps="libcelt"
2278 libfaac_encoder_deps="libfaac"
2279 libfaac_encoder_select="audio_frame_queue"
2280 libfdk_aac_decoder_deps="libfdk_aac"
2281 libfdk_aac_encoder_deps="libfdk_aac"
2282 libfdk_aac_encoder_select="audio_frame_queue"
2283 libgme_demuxer_deps="libgme"
2284 libgsm_decoder_deps="libgsm"
2285 libgsm_encoder_deps="libgsm"
2286 libgsm_ms_decoder_deps="libgsm"
2287 libgsm_ms_encoder_deps="libgsm"
2288 libilbc_decoder_deps="libilbc"
2289 libilbc_encoder_deps="libilbc"
2290 libmodplug_demuxer_deps="libmodplug"
2291 libmp3lame_encoder_deps="libmp3lame"
2292 libmp3lame_encoder_select="audio_frame_queue"
2293 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2294 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2295 libopencore_amrnb_encoder_select="audio_frame_queue"
2296 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2297 libopenjpeg_decoder_deps="libopenjpeg"
2298 libopenjpeg_encoder_deps="libopenjpeg"
2299 libopus_decoder_deps="libopus"
2300 libopus_encoder_deps="libopus"
2301 libopus_encoder_select="audio_frame_queue"
2302 libquvi_demuxer_deps="libquvi"
2303 libschroedinger_decoder_deps="libschroedinger"
2304 libschroedinger_encoder_deps="libschroedinger"
2305 libshine_encoder_deps="libshine"
2306 libshine_encoder_select="audio_frame_queue"
2307 libspeex_decoder_deps="libspeex"
2308 libspeex_encoder_deps="libspeex"
2309 libspeex_encoder_select="audio_frame_queue"
2310 libstagefright_h264_decoder_deps="libstagefright_h264"
2311 libtheora_encoder_deps="libtheora"
2312 libtwolame_encoder_deps="libtwolame"
2313 libvo_aacenc_encoder_deps="libvo_aacenc"
2314 libvo_aacenc_encoder_select="audio_frame_queue"
2315 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2316 libvorbis_decoder_deps="libvorbis"
2317 libvorbis_encoder_deps="libvorbis"
2318 libvorbis_encoder_select="audio_frame_queue"
2319 libvpx_vp8_decoder_deps="libvpx"
2320 libvpx_vp8_encoder_deps="libvpx"
2321 libvpx_vp9_decoder_deps="libvpx"
2322 libvpx_vp9_encoder_deps="libvpx"
2323 libwavpack_encoder_deps="libwavpack"
2324 libwebp_encoder_deps="libwebp"
2325 libx264_encoder_deps="libx264"
2326 libx264rgb_encoder_deps="libx264"
2327 libx265_encoder_deps="libx265"
2328 libxavs_encoder_deps="libxavs"
2329 libxvid_encoder_deps="libxvid"
2330 libutvideo_decoder_deps="libutvideo"
2331 libutvideo_encoder_deps="libutvideo"
2332 libzvbi_teletext_decoder_deps="libzvbi"
2333
2334 # demuxers / muxers
2335 ac3_demuxer_select="ac3_parser"
2336 asf_demuxer_select="riffdec"
2337 asf_muxer_select="riffenc"
2338 asf_stream_muxer_select="asf_muxer"
2339 avi_demuxer_select="riffdec exif"
2340 avi_muxer_select="riffenc"
2341 avisynth_demuxer_deps="avisynth"
2342 avisynth_demuxer_select="riffdec"
2343 caf_demuxer_select="riffdec"
2344 dirac_demuxer_select="dirac_parser"
2345 dts_demuxer_select="dca_parser"
2346 dtshd_demuxer_select="dca_parser"
2347 dxa_demuxer_select="riffdec"
2348 eac3_demuxer_select="ac3_parser"
2349 f4v_muxer_select="mov_muxer"
2350 flac_demuxer_select="flac_parser"
2351 hds_muxer_select="flv_muxer"
2352 hls_muxer_select="mpegts_muxer"
2353 image2_alias_pix_demuxer_select="image2_demuxer"
2354 image2_brender_pix_demuxer_select="image2_demuxer"
2355 ipod_muxer_select="mov_muxer"
2356 ismv_muxer_select="mov_muxer"
2357 libnut_demuxer_deps="libnut"
2358 libnut_muxer_deps="libnut"
2359 matroska_audio_muxer_select="matroska_muxer"
2360 matroska_demuxer_select="riffdec"
2361 matroska_demuxer_suggest="bzlib lzo zlib"
2362 matroska_muxer_select="riffenc"
2363 mmf_muxer_select="riffenc"
2364 mov_demuxer_select="riffdec"
2365 mov_demuxer_suggest="zlib"
2366 mov_muxer_select="riffenc rtpenc_chain"
2367 mp3_demuxer_select="mpegaudio_parser"
2368 mp4_muxer_select="mov_muxer"
2369 mpegts_muxer_select="adts_muxer latm_muxer"
2370 mpegtsraw_demuxer_select="mpegts_demuxer"
2371 mxf_d10_muxer_select="mxf_muxer"
2372 nut_muxer_select="riffenc"
2373 nuv_demuxer_select="riffdec"
2374 ogg_demuxer_select="golomb"
2375 psp_muxer_select="mov_muxer"
2376 rtp_demuxer_select="sdp_demuxer"
2377 rtpdec_select="asf_demuxer rm_demuxer rtp_protocol mpegts_demuxer mov_demuxer"
2378 rtsp_demuxer_select="http_protocol rtpdec"
2379 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2380 sap_demuxer_select="sdp_demuxer"
2381 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2382 sdp_demuxer_select="rtpdec"
2383 smoothstreaming_muxer_select="ismv_muxer"
2384 spdif_muxer_select="aac_parser"
2385 tak_demuxer_select="tak_parser"
2386 tg2_muxer_select="mov_muxer"
2387 tgp_muxer_select="mov_muxer"
2388 vobsub_demuxer_select="mpegps_demuxer"
2389 w64_demuxer_select="wav_demuxer"
2390 w64_muxer_select="wav_muxer"
2391 wav_demuxer_select="riffdec"
2392 wav_muxer_select="riffenc"
2393 webm_muxer_select="riffenc"
2394 wtv_demuxer_select="riffdec"
2395 wtv_muxer_select="riffenc"
2396 xmv_demuxer_select="riffdec"
2397 xwma_demuxer_select="riffdec"
2398
2399 # indevs / outdevs
2400 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2401 alsa_outdev_deps="alsa_asoundlib_h"
2402 avfoundation_indev_extralibs="-framework CoreVideo -framework Foundation -framework AVFoundation -framework CoreMedia"
2403 avfoundation_indev_select="avfoundation"
2404 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2405 caca_outdev_deps="libcaca"
2406 decklink_outdev_deps="decklink pthreads"
2407 decklink_outdev_extralibs="-lstdc++"
2408 dshow_indev_deps="IBaseFilter"
2409 dshow_indev_extralibs="-lpsapi -lole32 -lstrmiids -luuid"
2410 dv1394_indev_deps="dv1394"
2411 dv1394_indev_select="dv_demuxer"
2412 fbdev_indev_deps="linux_fb_h"
2413 fbdev_outdev_deps="linux_fb_h"
2414 gdigrab_indev_deps="CreateDIBSection"
2415 gdigrab_indev_extralibs="-lgdi32"
2416 gdigrab_indev_select="bmp_decoder"
2417 iec61883_indev_deps="libiec61883"
2418 jack_indev_deps="jack_jack_h sem_timedwait"
2419 lavfi_indev_deps="avfilter"
2420 libcdio_indev_deps="libcdio"
2421 libdc1394_indev_deps="libdc1394"
2422 libv4l2_indev_deps="libv4l2"
2423 openal_indev_deps="openal"
2424 opengl_outdev_deps="opengl"
2425 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2426 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2427 pulse_indev_deps="libpulse"
2428 pulse_outdev_deps="libpulse"
2429 qtkit_indev_extralibs="-framework QTKit -framework Foundation -framework QuartzCore"
2430 qtkit_indev_select="qtkit"
2431 sdl_outdev_deps="sdl"
2432 sndio_indev_deps="sndio_h"
2433 sndio_outdev_deps="sndio_h"
2434 v4l_indev_deps="linux_videodev_h"
2435 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2436 v4l2_outdev_deps_any="linux_videodev2_h sys_videoio_h"
2437 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2438 vfwcap_indev_extralibs="-lavicap32"
2439 xv_outdev_deps="X11_extensions_Xvlib_h XvGetPortAttribute"
2440 xv_outdev_extralibs="-lXv -lX11 -lXext"
2441 x11grab_indev_deps="x11grab"
2442
2443 # protocols
2444 bluray_protocol_deps="libbluray"
2445 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2446 ffrtmpcrypt_protocol_deps_any="gcrypt nettle openssl"
2447 ffrtmpcrypt_protocol_select="tcp_protocol"
2448 ffrtmphttp_protocol_deps="!librtmp_protocol"
2449 ffrtmphttp_protocol_select="http_protocol"
2450 ftp_protocol_select="tcp_protocol"
2451 gopher_protocol_select="network"
2452 http_protocol_select="tcp_protocol"
2453 httpproxy_protocol_select="tcp_protocol"
2454 https_protocol_select="tls_protocol"
2455 librtmp_protocol_deps="librtmp"
2456 librtmpe_protocol_deps="librtmp"
2457 librtmps_protocol_deps="librtmp"
2458 librtmpt_protocol_deps="librtmp"
2459 librtmpte_protocol_deps="librtmp"
2460 libssh_protocol_deps="libssh"
2461 mmsh_protocol_select="http_protocol"
2462 mmst_protocol_select="network"
2463 rtmp_protocol_deps="!librtmp_protocol"
2464 rtmp_protocol_select="tcp_protocol"
2465 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2466 rtmps_protocol_deps="!librtmp_protocol"
2467 rtmps_protocol_select="tls_protocol"
2468 rtmpt_protocol_select="ffrtmphttp_protocol"
2469 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2470 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2471 rtp_protocol_select="udp_protocol"
2472 sctp_protocol_deps="struct_sctp_event_subscribe"
2473 sctp_protocol_select="network"
2474 srtp_protocol_select="rtp_protocol"
2475 tcp_protocol_select="network"
2476 tls_protocol_deps_any="openssl gnutls"
2477 tls_protocol_select="tcp_protocol"
2478 udp_protocol_select="network"
2479 unix_protocol_deps="sys_un_h"
2480 unix_protocol_select="network"
2481
2482 # filters
2483 aconvert_filter_deps="swresample"
2484 amovie_filter_deps="avcodec avformat"
2485 aresample_filter_deps="swresample"
2486 ass_filter_deps="libass"
2487 asyncts_filter_deps="avresample"
2488 atempo_filter_deps="avcodec"
2489 atempo_filter_select="rdft"
2490 azmq_filter_deps="libzmq"
2491 blackframe_filter_deps="gpl"
2492 boxblur_filter_deps="gpl"
2493 bs2b_filter_deps="libbs2b"
2494 colormatrix_filter_deps="gpl"
2495 cropdetect_filter_deps="gpl"
2496 dctdnoiz_filter_deps="avcodec"
2497 dctdnoiz_filter_select="dct"
2498 delogo_filter_deps="gpl"
2499 deshake_filter_deps="avcodec"
2500 deshake_filter_select="dsputil"
2501 drawtext_filter_deps="libfreetype"
2502 ebur128_filter_deps="gpl"
2503 flite_filter_deps="libflite"
2504 frei0r_filter_deps="frei0r dlopen"
2505 frei0r_filter_extralibs='$ldl'
2506 frei0r_src_filter_deps="frei0r dlopen"
2507 frei0r_src_filter_extralibs='$ldl'
2508 geq_filter_deps="gpl"
2509 histeq_filter_deps="gpl"
2510 hqdn3d_filter_deps="gpl"
2511 interlace_filter_deps="gpl"
2512 kerndeint_filter_deps="gpl"
2513 ladspa_filter_deps="ladspa dlopen"
2514 ladspa_filter_extralibs='$ldl'
2515 mcdeint_filter_deps="avcodec gpl"
2516 movie_filter_deps="avcodec avformat"
2517 mp_filter_deps="gpl avcodec swscale inline_asm"
2518 mpdecimate_filter_deps="gpl avcodec"
2519 mptestsrc_filter_deps="gpl"
2520 negate_filter_deps="lut_filter"
2521 perspective_filter_deps="gpl"
2522 ocv_filter_deps="libopencv"
2523 owdenoise_filter_deps="gpl"
2524 pan_filter_deps="swresample"
2525 phase_filter_deps="gpl"
2526 pp_filter_deps="gpl postproc"
2527 pullup_filter_deps="gpl"
2528 removelogo_filter_deps="avcodec avformat swscale"
2529 resample_filter_deps="avresample"
2530 sab_filter_deps="gpl swscale"
2531 scale_filter_deps="swscale"
2532 smartblur_filter_deps="gpl swscale"
2533 showspectrum_filter_deps="avcodec"
2534 showspectrum_filter_select="rdft"
2535 spp_filter_deps="gpl avcodec"
2536 spp_filter_select="fft"
2537 stereo3d_filter_deps="gpl"
2538 subtitles_filter_deps="avformat avcodec libass"
2539 super2xsai_filter_deps="gpl"
2540 tinterlace_filter_deps="gpl"
2541 vidstabdetect_filter_deps="libvidstab"
2542 vidstabtransform_filter_deps="libvidstab"
2543 pixfmts_super2xsai_test_deps="super2xsai_filter"
2544 tinterlace_merge_test_deps="tinterlace_filter"
2545 tinterlace_pad_test_deps="tinterlace_filter"
2546 zmq_filter_deps="libzmq"
2547 zoompan_filter_deps="swscale"
2548
2549 # examples
2550 avio_reading="avformat avcodec avutil"
2551 avcodec_example_deps="avcodec avutil"
2552 demuxing_decoding_example_deps="avcodec avformat avutil"
2553 filter_audio_example_deps="avfilter avutil"
2554 filtering_audio_example_deps="avfilter avcodec avformat avutil"
2555 filtering_video_example_deps="avfilter avcodec avformat avutil"
2556 metadata_example_deps="avformat avutil"
2557 muxing_example_deps="avcodec avformat avutil swscale"
2558 remuxing_example_deps="avcodec avformat avutil"
2559 resampling_audio_example_deps="avutil swresample"
2560 scaling_video_example_deps="avutil swscale"
2561 transcode_aac_example_deps="avcodec avformat swresample"
2562 transcoding_example_deps="avfilter avcodec avformat avutil"
2563
2564 # libraries, in linking order
2565 avcodec_deps="avutil"
2566 avdevice_deps="avformat avcodec avutil"
2567 avfilter_deps="avutil"
2568 avformat_deps="avcodec avutil"
2569 avresample_deps="avutil"
2570 postproc_deps="avutil gpl"
2571 swresample_deps="avutil"
2572 swscale_deps="avutil"
2573
2574 # programs
2575 ffmpeg_deps="avcodec avfilter avformat swresample"
2576 ffmpeg_select="aformat_filter anull_filter atrim_filter format_filter
2577                null_filter
2578                setpts_filter trim_filter"
2579 ffplay_deps="avcodec avformat swscale swresample sdl"
2580 ffplay_libs='$sdl_libs'
2581 ffplay_select="rdft crop_filter transpose_filter hflip_filter vflip_filter rotate_filter"
2582 ffprobe_deps="avcodec avformat"
2583 ffserver_deps="avformat fork sarestart"
2584 ffserver_select="ffm_muxer rtp_protocol rtsp_demuxer"
2585
2586 # documentation
2587 podpages_deps="perl"
2588 manpages_deps="perl pod2man"
2589 htmlpages_deps="perl texi2html"
2590 txtpages_deps="perl makeinfo"
2591 doc_deps_any="manpages htmlpages podpages txtpages"
2592
2593 # default parameters
2594
2595 logfile="config.log"
2596
2597 # installation paths
2598 prefix_default="/usr/local"
2599 bindir_default='${prefix}/bin'
2600 datadir_default='${prefix}/share/ffmpeg'
2601 docdir_default='${prefix}/share/doc/ffmpeg'
2602 incdir_default='${prefix}/include'
2603 libdir_default='${prefix}/lib'
2604 mandir_default='${prefix}/share/man'
2605 shlibdir_default="$libdir_default"
2606
2607 # toolchain
2608 ar_default="ar"
2609 cc_default="gcc"
2610 cxx_default="g++"
2611 host_cc_default="gcc"
2612 cp_f="cp -f"
2613 install="install"
2614 ln_s="ln -s -f"
2615 nm_default="nm -g"
2616 objformat="elf"
2617 pkg_config_default=pkg-config
2618 ranlib_default="ranlib"
2619 strip_default="strip"
2620 yasmexe_default="yasm"
2621 windres_default="windres"
2622
2623 nogas=":"
2624
2625 # OS
2626 target_os_default=$(tolower $(uname -s))
2627 host_os=$target_os_default
2628
2629 # machine
2630 if test "$target_os_default" = aix; then
2631     arch_default=$(uname -p)
2632     strip_default="strip -X32_64"
2633 else
2634     arch_default=$(uname -m)
2635 fi
2636 cpu="generic"
2637
2638 # configurable options
2639 enable $PROGRAM_LIST
2640 enable $DOCUMENT_LIST
2641 enable $EXAMPLE_LIST
2642 enable $(filter_out avresample $LIBRARY_LIST)
2643 enable stripping
2644
2645 enable asm
2646 enable debug
2647 enable doc
2648 enable optimizations
2649 enable runtime_cpudetect
2650 enable safe_bitstream_reader
2651 enable static
2652 enable swscale_alpha
2653
2654 sws_max_filter_size_default=256
2655 set_default sws_max_filter_size
2656
2657 # Enable hwaccels by default.
2658 enable dxva2 vaapi vda vdpau xvmc
2659 enable xlib
2660
2661 # build settings
2662 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2663 LIBPREF="lib"
2664 LIBSUF=".a"
2665 FULLNAME='$(NAME)$(BUILDSUF)'
2666 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2667 SLIBPREF="lib"
2668 SLIBSUF=".so"
2669 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2670 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2671 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2672 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2673 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2674 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2675
2676 asflags_filter=echo
2677 cflags_filter=echo
2678 ldflags_filter=echo
2679
2680 AS_C='-c'
2681 AS_O='-o $@'
2682 CC_C='-c'
2683 CC_E='-E -o $@'
2684 CC_O='-o $@'
2685 CXX_C='-c'
2686 CXX_O='-o $@'
2687 LD_O='-o $@'
2688 LD_LIB='-l%'
2689 LD_PATH='-L'
2690 HOSTCC_C='-c'
2691 HOSTCC_E='-E -o $@'
2692 HOSTCC_O='-o $@'
2693 HOSTLD_O='-o $@'
2694
2695 host_libs='-lm'
2696 host_cflags_filter=echo
2697 host_ldflags_filter=echo
2698
2699 target_path='$(CURDIR)'
2700
2701 # since the object filename is not given with the -MM flag, the compiler
2702 # is only able to print the basename, and we must add the path ourselves
2703 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2704 DEPFLAGS='-MM'
2705
2706 # find source path
2707 if test -f configure; then
2708     source_path=.
2709 else
2710     source_path=$(cd $(dirname "$0"); pwd)
2711     echo "$source_path" | grep -q '[[:blank:]]' &&
2712         die "Out of tree builds are impossible with whitespace in source path."
2713     test -e "$source_path/config.h" &&
2714         die "Out of tree builds are impossible with config.h in source dir."
2715 fi
2716
2717 for v in "$@"; do
2718     r=${v#*=}
2719     l=${v%"$r"}
2720     r=$(sh_quote "$r")
2721     FFMPEG_CONFIGURATION="${FFMPEG_CONFIGURATION# } ${l}${r}"
2722 done
2723
2724 find_things(){
2725     thing=$1
2726     pattern=$2
2727     file=$source_path/$3
2728     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2729 }
2730
2731 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2732 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2733 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2734 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2735 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2736 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2737 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2738 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2739 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2740 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2741 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2742
2743 ALL_COMPONENTS="
2744     $BSF_LIST
2745     $DECODER_LIST
2746     $DEMUXER_LIST
2747     $ENCODER_LIST
2748     $FILTER_LIST
2749     $HWACCEL_LIST
2750     $INDEV_LIST
2751     $MUXER_LIST
2752     $OUTDEV_LIST
2753     $PARSER_LIST
2754     $PROTOCOL_LIST
2755 "
2756
2757 for n in $COMPONENT_LIST; do
2758     v=$(toupper ${n%s})_LIST
2759     eval enable \$$v
2760     eval ${n}_if_any="\$$v"
2761 done
2762
2763 enable $ARCH_EXT_LIST
2764
2765 die_unknown(){
2766     echo "Unknown option \"$1\"."
2767     echo "See $0 --help for available options."
2768     exit 1
2769 }
2770
2771 print_3_columns() {
2772     cat | tr ' ' '\n' | sort | pr -r -3 -t
2773 }
2774
2775 show_list() {
2776     suffix=_$1
2777     shift
2778     echo $* | sed s/$suffix//g | print_3_columns
2779     exit 0
2780 }
2781
2782 rand_list(){
2783     IFS=', '
2784     set -- $*
2785     unset IFS
2786     for thing; do
2787         comp=${thing%:*}
2788         prob=${thing#$comp}
2789         prob=${prob#:}
2790         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2791         echo "prob ${prob:-0.5}"
2792         printf '%s\n' $comp
2793     done
2794 }
2795
2796 do_random(){
2797     action=$1
2798     shift
2799     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2800     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2801 }
2802
2803 for opt do
2804     optval="${opt#*=}"
2805     case "$opt" in
2806         --extra-ldflags=*)
2807             add_ldflags $optval
2808         ;;
2809         --extra-libs=*)
2810             add_extralibs $optval
2811         ;;
2812         --disable-devices)
2813             disable $INDEV_LIST $OUTDEV_LIST
2814         ;;
2815         --enable-debug=*)
2816             debuglevel="$optval"
2817         ;;
2818         --disable-programs)
2819             disable $PROGRAM_LIST
2820         ;;
2821         --disable-everything)
2822             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2823         ;;
2824         --disable-all)
2825             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2826             disable $LIBRARY_LIST $PROGRAM_LIST doc
2827         ;;
2828         --enable-random|--disable-random)
2829             action=${opt%%-random}
2830             do_random ${action#--} $COMPONENT_LIST
2831         ;;
2832         --enable-random=*|--disable-random=*)
2833             action=${opt%%-random=*}
2834             do_random ${action#--} $optval
2835         ;;
2836         --enable-*=*|--disable-*=*)
2837             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2838             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2839             eval list=\$$(toupper $thing)_LIST
2840             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2841             list=$(filter "$name" $list)
2842             [ "$list" = "" ] && warn "Option $opt did not match anything"
2843             $action $list
2844         ;;
2845         --enable-?*|--disable-?*)
2846             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2847             if is_in $option $COMPONENT_LIST; then
2848                 test $action = disable && action=unset
2849                 eval $action \$$(toupper ${option%s})_LIST
2850             elif is_in $option $CMDLINE_SELECT; then
2851                 $action $option
2852             else
2853                 die_unknown $opt
2854             fi
2855         ;;
2856         --list-*)
2857             NAME="${opt#--list-}"
2858             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2859             NAME=${NAME%s}
2860             eval show_list $NAME \$$(toupper $NAME)_LIST
2861         ;;
2862         --help|-h) show_help
2863         ;;
2864         --fatal-warnings) enable fatal_warnings
2865         ;;
2866         *)
2867             optname="${opt%%=*}"
2868             optname="${optname#--}"
2869             optname=$(echo "$optname" | sed 's/-/_/g')
2870             if is_in $optname $CMDLINE_SET; then
2871                 eval $optname='$optval'
2872             elif is_in $optname $CMDLINE_APPEND; then
2873                 append $optname "$optval"
2874             else
2875                 die_unknown $opt
2876             fi
2877         ;;
2878     esac
2879 done
2880
2881 disabled logging && logfile=/dev/null
2882
2883 echo "# $0 $FFMPEG_CONFIGURATION" > $logfile
2884 set >> $logfile
2885
2886 test -n "$cross_prefix" && enable cross_compile
2887
2888 if enabled cross_compile; then
2889     test -n "$arch" && test -n "$target_os" ||
2890         die "Must specify target arch and OS when cross-compiling"
2891 fi
2892
2893 ar_default="${cross_prefix}${ar_default}"
2894 cc_default="${cross_prefix}${cc_default}"
2895 cxx_default="${cross_prefix}${cxx_default}"
2896 nm_default="${cross_prefix}${nm_default}"
2897 pkg_config_default="${cross_prefix}${pkg_config_default}"
2898 ranlib_default="${cross_prefix}${ranlib_default}"
2899 strip_default="${cross_prefix}${strip_default}"
2900 windres_default="${cross_prefix}${windres_default}"
2901
2902 sysinclude_default="${sysroot}/usr/include"
2903
2904 test -n "$valgrind" && toolchain="valgrind-memcheck"
2905
2906 case "$toolchain" in
2907     clang-asan)
2908         cc_default="clang"
2909         add_cflags  -fsanitize=address
2910         add_ldflags -fsanitize=address
2911     ;;
2912     clang-tsan)
2913         cc_default="clang"
2914         add_cflags  -fsanitize=thread -pie
2915         add_ldflags -fsanitize=thread -pie
2916     ;;
2917     clang-usan)
2918         cc_default="clang"
2919         add_cflags  -fsanitize=undefined
2920         add_ldflags -fsanitize=undefined
2921     ;;
2922     gcc-asan)
2923         cc_default="gcc"
2924         add_cflags  -fsanitize=address
2925         add_ldflags -fsanitize=address
2926     ;;
2927     gcc-tsan)
2928         cc_default="gcc"
2929         add_cflags  -fsanitize=thread -pie -fPIC
2930         add_ldflags -fsanitize=thread -pie -fPIC
2931     ;;
2932     gcc-usan)
2933         cc_default="gcc"
2934         add_cflags  -fsanitize=undefined
2935         add_ldflags -fsanitize=undefined
2936     ;;
2937     valgrind-massif)
2938         target_exec_default=${valgrind:-"valgrind"}
2939         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"
2940     ;;
2941     valgrind-memcheck)
2942         target_exec_default=${valgrind:-"valgrind"}
2943         target_exec_args="--error-exitcode=1 --malloc-fill=0x2a --track-origins=yes --leak-check=full --gen-suppressions=all --suppressions=$source_path/tests/fate-valgrind.supp"
2944     ;;
2945     msvc)
2946         # Check whether the current MSVC version needs the C99 converter.
2947         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2948         # support enough of C99 to build ffmpeg. Default to the new
2949         # behaviour if the regexp was unable to match anything, since this
2950         # successfully parses the version number of existing supported
2951         # versions that require the converter (MSVC 2010 and 2012).
2952         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2953         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2954             cc_default="cl"
2955         else
2956             cc_default="c99wrap cl"
2957         fi
2958         ld_default="link"
2959         nm_default="dumpbin -symbols"
2960         ar_default="lib"
2961         target_os_default="win32"
2962         # Use a relative path for TMPDIR. This makes sure all the
2963         # ffconf temp files are written with a relative path, avoiding
2964         # issues with msys/win32 path conversion for MSVC parameters
2965         # such as -Fo<file> or -out:<file>.
2966         TMPDIR=.
2967     ;;
2968     icl)
2969         cc_default="icl"
2970         ld_default="xilink"
2971         nm_default="dumpbin -symbols"
2972         ar_default="xilib"
2973         target_os_default="win32"
2974         TMPDIR=.
2975     ;;
2976     gcov)
2977         add_cflags  -fprofile-arcs -ftest-coverage
2978         add_ldflags -fprofile-arcs -ftest-coverage
2979     ;;
2980     hardened)
2981         add_cflags  -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all
2982         add_ldflags -Wl,-z,relro -Wl,-z,now
2983     ;;
2984     ?*)
2985         die "Unknown toolchain $toolchain"
2986     ;;
2987 esac
2988
2989 set_default arch cc cxx pkg_config ranlib strip sysinclude target_exec target_os yasmexe
2990 enabled cross_compile || host_cc_default=$cc
2991 set_default host_cc
2992
2993 if ! $pkg_config --version >/dev/null 2>&1; then
2994     warn "$pkg_config not found, library detection may fail."
2995     pkg_config=false
2996 fi
2997
2998 exesuf() {
2999     case $1 in
3000         mingw32*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
3001     esac
3002 }
3003
3004 EXESUF=$(exesuf $target_os)
3005 HOSTEXESUF=$(exesuf $host_os)
3006
3007 # set temporary file name
3008 : ${TMPDIR:=$TEMPDIR}
3009 : ${TMPDIR:=$TMP}
3010 : ${TMPDIR:=/tmp}
3011
3012 if [ -n "$tempprefix" ] ; then
3013     mktemp(){
3014         echo $tempprefix.${HOSTNAME}.${UID}
3015     }
3016 elif ! check_cmd mktemp -u XXXXXX; then
3017     # simple replacement for missing mktemp
3018     # NOT SAFE FOR GENERAL USE
3019     mktemp(){
3020         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
3021     }
3022 fi
3023
3024 tmpfile(){
3025     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
3026         (set -C; exec > $tmp) 2>/dev/null ||
3027         die "Unable to create temporary file in $TMPDIR."
3028     append TMPFILES $tmp
3029     eval $1=$tmp
3030 }
3031
3032 trap 'rm -f -- $TMPFILES' EXIT
3033
3034 tmpfile TMPASM .asm
3035 tmpfile TMPC   .c
3036 tmpfile TMPCPP .cpp
3037 tmpfile TMPE   $EXESUF
3038 tmpfile TMPH   .h
3039 tmpfile TMPM   .m
3040 tmpfile TMPO   .o
3041 tmpfile TMPS   .S
3042 tmpfile TMPSH  .sh
3043 tmpfile TMPV   .ver
3044
3045 unset -f mktemp
3046
3047 chmod +x $TMPE
3048
3049 # make sure we can execute files in $TMPDIR
3050 cat > $TMPSH 2>> $logfile <<EOF
3051 #! /bin/sh
3052 EOF
3053 chmod +x $TMPSH >> $logfile 2>&1
3054 if ! $TMPSH >> $logfile 2>&1; then
3055     cat <<EOF
3056 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
3057 variable to another directory and make sure that it is not mounted noexec.
3058 EOF
3059     die "Sanity test failed."
3060 fi
3061
3062 ccc_flags(){
3063     for flag; do
3064         case $flag in
3065             -std=c99)           echo -c99                       ;;
3066             -mcpu=*)            echo -arch ${flag#*=}           ;;
3067             -mieee)             echo -ieee                      ;;
3068             -O*|-fast)          echo $flag                      ;;
3069             -fno-math-errno)    echo -assume nomath_errno       ;;
3070             -g)                 echo -g3                        ;;
3071             -Wall)              echo -msg_enable level2         ;;
3072             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
3073             -Wl,*)              echo $flag                      ;;
3074             -f*|-W*)                                            ;;
3075             *)                  echo $flag                      ;;
3076         esac
3077    done
3078 }
3079
3080 cparser_flags(){
3081     for flag; do
3082         case $flag in
3083             -Wno-switch)             echo -Wno-switch-enum ;;
3084             -Wno-format-zero-length) ;;
3085             -Wdisabled-optimization) ;;
3086             -Wno-pointer-sign)       echo -Wno-other ;;
3087             *)                       echo $flag ;;
3088         esac
3089     done
3090 }
3091
3092 msvc_common_flags(){
3093     for flag; do
3094         case $flag in
3095             # In addition to specifying certain flags under the compiler
3096             # specific filters, they must be specified here as well or else the
3097             # generic catch all at the bottom will print the original flag.
3098             -Wall)                ;;
3099             -std=c99)             ;;
3100             # Common flags
3101             -fomit-frame-pointer) ;;
3102             -g)                   echo -Z7 ;;
3103             -fno-math-errno)      ;;
3104             -fno-common)          ;;
3105             -fno-signed-zeros)    ;;
3106             -fPIC)                ;;
3107             -mthumb)              ;;
3108             -march=*)             ;;
3109             -lz)                  echo zlib.lib ;;
3110             -lavifil32)           echo vfw32.lib ;;
3111             -lavicap32)           echo vfw32.lib user32.lib ;;
3112             -l*)                  echo ${flag#-l}.lib ;;
3113             *)                    echo $flag ;;
3114         esac
3115     done
3116 }
3117
3118 msvc_flags(){
3119     msvc_common_flags "$@"
3120     for flag; do
3121         case $flag in
3122             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3123                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3124                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3125                                        -wd4554 \
3126                                        -wd4273 ;;
3127         esac
3128     done
3129 }
3130
3131 icl_flags(){
3132     msvc_common_flags "$@"
3133     for flag; do
3134         case $flag in
3135             # Despite what Intel's documentation says -Wall, which is supported
3136             # on Windows, does enable remarks so disable them here.
3137             -Wall)                echo $flag -Qdiag-disable:remark ;;
3138             -std=c99)             echo -Qstd=c99 ;;
3139         esac
3140     done
3141 }
3142
3143 icc_flags(){
3144     for flag; do
3145         case $flag in
3146             -flto)                echo -ipo ;;
3147             *)                    echo $flag ;;
3148         esac
3149     done
3150 }
3151
3152 pgi_flags(){
3153     for flag; do
3154         case $flag in
3155             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3156             -fomit-frame-pointer) echo -Mnoframe ;;
3157             -g)                   echo -gopt ;;
3158             *)                    echo $flag ;;
3159         esac
3160     done
3161 }
3162
3163 suncc_flags(){
3164     for flag; do
3165         case $flag in
3166             -march=*|-mcpu=*)
3167                 case "${flag#*=}" in
3168                     native)                   echo -xtarget=native       ;;
3169                     v9|niagara)               echo -xarch=sparc          ;;
3170                     ultrasparc)               echo -xarch=sparcvis       ;;
3171                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3172                     i586|pentium)             echo -xchip=pentium        ;;
3173                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3174                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3175                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3176                     pentium4*)          echo -xtarget=pentium4           ;;
3177                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3178                     *-sse3)             echo -xarch=sse3                 ;;
3179                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3180                     bonnell)                   echo -xarch=ssse3         ;;
3181                     corei7|nehalem)            echo -xtarget=nehalem     ;;
3182                     westmere)                  echo -xtarget=westmere    ;;
3183                     silvermont)                echo -xarch=sse4_2        ;;
3184                     corei7-avx|sandybridge)    echo -xtarget=sandybridge ;;
3185                     core-avx*|ivybridge|haswell|broadwell)
3186                                                echo -xarch=avx           ;;
3187                     amdfam10|barcelona)        echo -xtarget=barcelona   ;;
3188                     btver1)                    echo -xarch=amdsse4a      ;;
3189                     btver2|bdver*)             echo -xarch=avx           ;;
3190                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3191                     k8|opteron|athlon64|athlon-fx)
3192                                                echo -xarch=sse2a         ;;
3193                     athlon*)                   echo -xarch=pentium_proa  ;;
3194                 esac
3195                 ;;
3196             -std=c99)             echo -xc99              ;;
3197             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3198             -fPIC)                echo -KPIC -xcode=pic32 ;;
3199             -W*,*)                echo $flag              ;;
3200             -f*-*|-W*|-mimpure-text)                      ;;
3201             -shared)              echo -G                 ;;
3202             *)                    echo $flag              ;;
3203         esac
3204     done
3205 }
3206
3207 tms470_flags(){
3208     for flag; do
3209         case $flag in
3210             -march=*|-mcpu=*)
3211                 case "${flag#*=}" in
3212                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3213                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3214                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3215                     armv6*|arm11*)          echo -mv=6   ;;
3216                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3217                                             echo -mv=5e  ;;
3218                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3219                 esac
3220                 ;;
3221             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3222             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3223             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3224             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3225             -msoft-float)   echo --float_support=vfplib       ;;
3226             -O[0-3]|-mf=*)  echo $flag                        ;;
3227             -g)             echo -g -mn                       ;;
3228             -pds=*)         echo $flag                        ;;
3229             -D*|-I*)        echo $flag                        ;;
3230             --gcc|--abi=*)  echo $flag                        ;;
3231             -me)            echo $flag                        ;;
3232         esac
3233     done
3234 }
3235
3236 probe_cc(){
3237     pfx=$1
3238     _cc=$2
3239
3240     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3241     unset _ld_o _ldflags _ld_lib _ld_path
3242     unset _depflags _DEPCMD _DEPFLAGS
3243     _flags_filter=echo
3244
3245     if $_cc --version 2>&1 | grep -q '^GNU assembler'; then
3246         true # no-op to avoid reading stdin in following checks
3247     elif $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3248         _type=llvm_gcc
3249         gcc_extra_ver=$(expr "$($_cc --version | head -n1)" : '.*\((.*)\)')
3250         _ident="llvm-gcc $($_cc -dumpversion) $gcc_extra_ver"
3251         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3252         _cflags_speed='-O3'
3253         _cflags_size='-Os'
3254     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3255         _type=gcc
3256         gcc_version=$($_cc --version | head -n1)
3257         gcc_basever=$($_cc -dumpversion)
3258         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3259         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3260         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3261         if ! $_cc -dumpversion | grep -q '^2\.'; then
3262             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3263         fi
3264         _cflags_speed='-O3'
3265         _cflags_size='-Os'
3266     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3267         _type=icc
3268         _ident=$($_cc --version | head -n1)
3269         _depflags='-MMD'
3270         _cflags_speed='-O3'
3271         _cflags_size='-Os'
3272         _cflags_noopt='-O1'
3273         _flags_filter=icc_flags
3274     elif $_cc -v 2>&1 | grep -q xlc; then
3275         _type=xlc
3276         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3277         _cflags_speed='-O5'
3278         _cflags_size='-O5 -qcompact'
3279     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3280         _type=ccc
3281         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3282         _DEPFLAGS='-M'
3283         _cflags_speed='-fast'
3284         _cflags_size='-O1'
3285         _flags_filter=ccc_flags
3286     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3287         test -d "$sysroot" || die "No valid sysroot specified."
3288         _type=armcc
3289         _ident=$($_cc --vsn | head -n1 | sed 's/.*: //')
3290         armcc_conf="$PWD/armcc.conf"
3291         $_cc --arm_linux_configure                 \
3292              --arm_linux_config_file="$armcc_conf" \
3293              --configure_sysroot="$sysroot"        \
3294              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3295              die "Error creating armcc configuration file."
3296         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3297         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3298         as_default="${cross_prefix}gcc"
3299         _depflags='-MMD'
3300         _cflags_speed='-O3'
3301         _cflags_size='-Os'
3302     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3303         _type=tms470
3304         _ident=$($_cc -version | head -n1 | tr -s ' ')
3305         _flags='--gcc --abi=eabi -me'
3306         _cc_e='-ppl -fe=$@'
3307         _cc_o='-fe=$@'
3308         _depflags='-ppa -ppd=$(@:.o=.d)'
3309         _cflags_speed='-O3 -mf=5'
3310         _cflags_size='-O3 -mf=2'
3311         _flags_filter=tms470_flags
3312     elif $_cc -v 2>&1 | grep -q clang; then
3313         _type=clang
3314         _ident=$($_cc --version | head -n1)
3315         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3316         _cflags_speed='-O3'
3317         _cflags_size='-Os'
3318     elif $_cc -V 2>&1 | grep -q Sun; then
3319         _type=suncc
3320         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3321         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3322         _DEPFLAGS='-xM1 -xc99'
3323         _ldflags='-std=c99'
3324         _cflags_speed='-O5'
3325         _cflags_size='-O5 -xspace'
3326         _flags_filter=suncc_flags
3327     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3328         _type=pathscale
3329         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3330         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3331         _cflags_speed='-O2'
3332         _cflags_size='-Os'
3333         _flags_filter='filter_out -Wdisabled-optimization'
3334     elif $_cc -v 2>&1 | grep -q Open64; then
3335         _type=open64
3336         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3337         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3338         _cflags_speed='-O2'
3339         _cflags_size='-Os'
3340         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3341     elif $_cc -V 2>&1 | grep -q Portland; then
3342         _type=pgi
3343         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3344         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3345         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3346         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3347         _cflags_noopt="-O"
3348         _flags_filter=pgi_flags
3349     elif $_cc 2>&1 | grep -q Microsoft; then
3350         _type=msvc
3351         _ident=$($cc 2>&1 | head -n1)
3352         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3353         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3354         _cflags_speed="-O2"
3355         _cflags_size="-O1"
3356         if $_cc 2>&1 | grep -q Linker; then
3357             _ld_o='-out:$@'
3358         else
3359             _ld_o='-Fe$@'
3360         fi
3361         _cc_o='-Fo$@'
3362         _cc_e='-P -Fi$@'
3363         _flags_filter=msvc_flags
3364         _ld_lib='lib%.a'
3365         _ld_path='-libpath:'
3366         _flags='-nologo'
3367         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -Dinline=__inline -FIstdlib.h -Dstrtoll=_strtoi64'
3368         if [ $pfx = hostcc ]; then
3369             append _cflags -Dsnprintf=_snprintf
3370         fi
3371         disable stripping
3372     elif $_cc 2>&1 | grep -q Intel; then
3373         _type=icl
3374         _ident=$($cc 2>&1 | head -n1)
3375         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3376         # Not only is O3 broken on 13.x+ but it is slower on all previous
3377         # versions (tested) as well.
3378         _cflags_speed="-O2"
3379         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3380         if $_cc 2>&1 | grep -q Linker; then
3381             _ld_o='-out:$@'
3382         else
3383             _ld_o='-Fe$@'
3384         fi
3385         _cc_o='-Fo$@'
3386         _cc_e='-P'
3387         _flags_filter=icl_flags
3388         _ld_lib='lib%.a'
3389         _ld_path='-libpath:'
3390         # -Qdiag-error to make icl error when seeing certain unknown arguments
3391         _flags='-nologo -Qdiag-error:4044,10157'
3392         # -Qvec- -Qsimd- to prevent miscompilation, -GS, fp:precise for consistency
3393         # with MSVC which enables it by default.
3394         _cflags='-D_USE_MATH_DEFINES -FIstdlib.h -Dstrtoll=_strtoi64 -Qms0 -Qvec- -Qsimd- -GS -fp:precise'
3395         if [ $pfx = hostcc ]; then
3396             append _cflags -Dsnprintf=_snprintf
3397         fi
3398     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3399         _type=cparser
3400         _ident=$($_cc --version | head -n1)
3401         _depflags='-MMD'
3402         _cflags_speed='-O4'
3403         _cflags_size='-O2'
3404         _flags_filter=cparser_flags
3405     fi
3406
3407     eval ${pfx}_type=\$_type
3408     eval ${pfx}_ident=\$_ident
3409 }
3410
3411 set_ccvars(){
3412     eval ${1}_C=\${_cc_c-\${${1}_C}}
3413     eval ${1}_E=\${_cc_e-\${${1}_E}}
3414     eval ${1}_O=\${_cc_o-\${${1}_O}}
3415
3416     if [ -n "$_depflags" ]; then
3417         eval ${1}_DEPFLAGS=\$_depflags
3418     else
3419         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3420         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3421         eval DEP${1}FLAGS=\$_flags
3422     fi
3423 }
3424
3425 probe_cc cc "$cc"
3426 cflags_filter=$_flags_filter
3427 cflags_speed=$_cflags_speed
3428 cflags_size=$_cflags_size
3429 cflags_noopt=$_cflags_noopt
3430 add_cflags $_flags $_cflags
3431 cc_ldflags=$_ldflags
3432 set_ccvars CC
3433
3434 probe_cc hostcc "$host_cc"
3435 host_cflags_filter=$_flags_filter
3436 add_host_cflags  $_flags $_cflags
3437 set_ccvars HOSTCC
3438
3439 test -n "$cc_type" && enable $cc_type ||
3440     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3441
3442 : ${as_default:=$cc}
3443 : ${dep_cc_default:=$cc}
3444 : ${ld_default:=$cc}
3445 : ${host_ld_default:=$host_cc}
3446 set_default ar as dep_cc ld host_ld windres
3447
3448 probe_cc as "$as"
3449 asflags_filter=$_flags_filter
3450 add_asflags $_flags $_cflags
3451 set_ccvars AS
3452
3453 probe_cc ld "$ld"
3454 ldflags_filter=$_flags_filter
3455 add_ldflags $_flags $_ldflags
3456 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3457 LD_O=${_ld_o-$LD_O}
3458 LD_LIB=${_ld_lib-$LD_LIB}
3459 LD_PATH=${_ld_path-$LD_PATH}
3460
3461 probe_cc hostld "$host_ld"
3462 host_ldflags_filter=$_flags_filter
3463 add_host_ldflags $_flags $_ldflags
3464 HOSTLD_O=${_ld_o-$HOSTLD_O}
3465
3466 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3467     probe_cc depcc "$dep_cc"
3468     CCDEP=${_DEPCMD:-$DEPCMD}
3469     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3470     DEPCCFLAGS=$_flags
3471 fi
3472
3473 if $ar 2>&1 | grep -q Microsoft; then
3474     arflags="-nologo"
3475     ar_o='-out:$@'
3476 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3477     arflags="rq"
3478     ar_o='$@'
3479 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3480     arflags='-Xany -r -c'
3481     ar_o='$@'
3482 else
3483     arflags="rc"
3484     ar_o='$@'
3485 fi
3486
3487 add_cflags $extra_cflags
3488 add_cxxflags $extra_cxxflags
3489 add_asflags $extra_cflags
3490
3491 if test -n "$sysroot"; then
3492     case "$cc_type" in
3493         gcc|llvm_gcc|clang)
3494             add_cppflags --sysroot="$sysroot"
3495             add_ldflags --sysroot="$sysroot"
3496 # On Darwin --sysroot may be ignored, -isysroot always affects headers and linking
3497             add_cppflags -isysroot "$sysroot"
3498             add_ldflags -isysroot "$sysroot"
3499         ;;
3500         tms470)
3501             add_cppflags -I"$sysinclude"
3502             add_ldflags  --sysroot="$sysroot"
3503         ;;
3504     esac
3505 fi
3506
3507 if test "$cpu" = host; then
3508     enabled cross_compile &&
3509         die "--cpu=host makes no sense when cross-compiling."
3510
3511     case "$cc_type" in
3512         gcc|llvm_gcc)
3513             check_native(){
3514                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3515                 sed -n "/cc1.*$1=/{
3516                             s/.*$1=\\([^ ]*\\).*/\\1/
3517                             p
3518                             q
3519                         }" $TMPE
3520             }
3521             cpu=$(check_native -march || check_native -mcpu)
3522         ;;
3523     esac
3524
3525     test "${cpu:-host}" = host &&
3526         die "--cpu=host not supported with compiler $cc"
3527 fi
3528
3529 # Deal with common $arch aliases
3530 case "$arch" in
3531     aarch64|arm64)
3532         arch="aarch64"
3533     ;;
3534     arm*|iPad*|iPhone*)
3535         arch="arm"
3536     ;;
3537     mips*|IP*)
3538         arch="mips"
3539     ;;
3540     parisc*|hppa*)
3541         arch="parisc"
3542     ;;
3543     "Power Macintosh"|ppc*|powerpc*)
3544         arch="ppc"
3545     ;;
3546     s390|s390x)
3547         arch="s390"
3548     ;;
3549     sh4|sh)
3550         arch="sh4"
3551     ;;
3552     sun4u|sparc*)
3553         arch="sparc"
3554     ;;
3555     tilegx|tile-gx)
3556         arch="tilegx"
3557     ;;
3558     i[3-6]86*|i86pc|BePC|x86pc|x86_64|x86_32|amd64)
3559         arch="x86"
3560     ;;
3561 esac
3562
3563 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3564 enable $arch
3565
3566 # Add processor-specific flags
3567 if enabled aarch64; then
3568
3569     case $cpu in
3570         armv*)
3571             cpuflags="-march=$cpu"
3572         ;;
3573         *)
3574             cpuflags="-mcpu=$cpu"
3575         ;;
3576     esac
3577
3578 elif enabled alpha; then
3579
3580     cpuflags="-mcpu=$cpu"
3581
3582 elif enabled arm; then
3583
3584     check_arm_arch() {
3585         check_cpp_condition stddef.h \
3586             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3587             $cpuflags
3588     }
3589
3590     probe_arm_arch() {
3591         if   check_arm_arch 4;        then echo armv4;
3592         elif check_arm_arch 4T;       then echo armv4t;
3593         elif check_arm_arch 5;        then echo armv5;
3594         elif check_arm_arch 5E;       then echo armv5e;
3595         elif check_arm_arch 5T;       then echo armv5t;
3596         elif check_arm_arch 5TE;      then echo armv5te;
3597         elif check_arm_arch 5TEJ;     then echo armv5te;
3598         elif check_arm_arch 6;        then echo armv6;
3599         elif check_arm_arch 6J;       then echo armv6j;
3600         elif check_arm_arch 6K;       then echo armv6k;
3601         elif check_arm_arch 6Z;       then echo armv6z;
3602         elif check_arm_arch 6ZK;      then echo armv6zk;
3603         elif check_arm_arch 6T2;      then echo armv6t2;
3604         elif check_arm_arch 7;        then echo armv7;
3605         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3606         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3607         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3608         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3609         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3610         fi
3611     }
3612
3613     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3614
3615     case $cpu in
3616         armv*)
3617             cpuflags="-march=$cpu"
3618             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3619         ;;
3620         *)
3621             cpuflags="-mcpu=$cpu"
3622             case $cpu in
3623                 cortex-a*)                               subarch=armv7a  ;;
3624                 cortex-r*)                               subarch=armv7r  ;;
3625                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3626                 arm11*)                                  subarch=armv6   ;;
3627                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3628                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3629                 *)                             subarch=$(probe_arm_arch) ;;
3630             esac
3631         ;;
3632     esac
3633
3634     case "$subarch" in
3635         armv5t*)    enable fast_clz                ;;
3636         armv[6-8]*)
3637             enable fast_clz
3638             disabled fast_unaligned || enable fast_unaligned
3639             ;;
3640     esac
3641
3642 elif enabled avr32; then
3643
3644     case $cpu in
3645         ap7[02]0[0-2])
3646             subarch="avr32_ap"
3647             cpuflags="-mpart=$cpu"
3648         ;;
3649         ap)
3650             subarch="avr32_ap"
3651             cpuflags="-march=$cpu"
3652         ;;
3653         uc3[ab]*)
3654             subarch="avr32_uc"
3655             cpuflags="-mcpu=$cpu"
3656         ;;
3657         uc)
3658             subarch="avr32_uc"
3659             cpuflags="-march=$cpu"
3660         ;;
3661     esac
3662
3663 elif enabled bfin; then
3664
3665     cpuflags="-mcpu=$cpu"
3666
3667 elif enabled mips; then
3668
3669     cpuflags="-march=$cpu"
3670
3671     case $cpu in
3672         24kc)
3673             disable mipsfpu
3674             disable mipsdspr1
3675             disable mipsdspr2
3676         ;;
3677         24kf*)
3678             disable mipsdspr1
3679             disable mipsdspr2
3680         ;;
3681         24kec|34kc|1004kc)
3682             disable mipsfpu
3683             disable mipsdspr2
3684         ;;
3685         24kef*|34kf*|1004kf*)
3686             disable mipsdspr2
3687         ;;
3688         74kc)
3689             disable mipsfpu
3690         ;;
3691     esac
3692
3693 elif enabled ppc; then
3694
3695     disable ldbrx
3696     disable vsx
3697
3698     case $(tolower $cpu) in
3699         601|ppc601|powerpc601)
3700             cpuflags="-mcpu=601"
3701             disable altivec
3702         ;;
3703         603*|ppc603*|powerpc603*)
3704             cpuflags="-mcpu=603"
3705             disable altivec
3706         ;;
3707         604*|ppc604*|powerpc604*)
3708             cpuflags="-mcpu=604"
3709             disable altivec
3710         ;;
3711         g3|75*|ppc75*|powerpc75*)
3712             cpuflags="-mcpu=750"
3713             disable altivec
3714         ;;
3715         g4|745*|ppc745*|powerpc745*)
3716             cpuflags="-mcpu=7450"
3717         ;;
3718         74*|ppc74*|powerpc74*)
3719             cpuflags="-mcpu=7400"
3720         ;;
3721         g5|970|ppc970|powerpc970)
3722             cpuflags="-mcpu=970"
3723         ;;
3724         power[3-8]*)
3725             cpuflags="-mcpu=$cpu"
3726         ;;
3727         cell)
3728             cpuflags="-mcpu=cell"
3729             enable ldbrx
3730         ;;
3731         e500mc)
3732             cpuflags="-mcpu=e500mc"
3733             disable altivec
3734         ;;
3735         e500v2)
3736             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3737             disable altivec
3738             disable dcbzl
3739         ;;
3740         e500)
3741             cpuflags="-mcpu=8540 -mhard-float"
3742             disable altivec
3743             disable dcbzl
3744         ;;
3745     esac
3746
3747 elif enabled sparc; then
3748
3749     case $cpu in
3750         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3751             cpuflags="-mcpu=$cpu"
3752         ;;
3753         ultrasparc*|niagara[234])
3754             cpuflags="-mcpu=$cpu"
3755         ;;
3756     esac
3757
3758 elif enabled x86; then
3759
3760     case $cpu in
3761         i[345]86|pentium)
3762             cpuflags="-march=$cpu"
3763             disable mmx
3764         ;;
3765         # targets that do NOT support nopl and conditional mov (cmov)
3766         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3767             cpuflags="-march=$cpu"
3768             disable i686
3769         ;;
3770         # targets that do support nopl and conditional mov (cmov)
3771         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx\
3772         |core*|atom|bonnell|nehalem|westmere|silvermont|sandybridge|ivybridge|haswell|broadwell|amdfam10|barcelona|b[dt]ver*)
3773             cpuflags="-march=$cpu"
3774             enable i686
3775             enable fast_cmov
3776         ;;
3777         # targets that do support conditional mov but on which it's slow
3778         pentium4|pentium4m|prescott|nocona)
3779             cpuflags="-march=$cpu"
3780             enable i686
3781             disable fast_cmov
3782         ;;
3783     esac
3784
3785 fi
3786
3787 if [ "$cpu" != generic ]; then
3788     add_cflags  $cpuflags
3789     add_asflags $cpuflags
3790 fi
3791
3792 # compiler sanity check
3793 check_exec <<EOF
3794 int main(void){ return 0; }
3795 EOF
3796 if test "$?" != 0; then
3797     echo "$cc is unable to create an executable file."
3798     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3799         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3800         echo "Only do this if you know what cross compiling means."
3801     fi
3802     die "C compiler test failed."
3803 fi
3804
3805 add_cppflags -D_ISOC99_SOURCE
3806 add_cxxflags -D__STDC_CONSTANT_MACROS
3807 check_cflags -std=c99
3808 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3809 #include <stdlib.h>
3810 EOF
3811 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3812 #include <stdlib.h>
3813 EOF
3814
3815 add_host_cppflags -D_ISOC99_SOURCE
3816 check_host_cflags -std=c99
3817 check_host_cflags -Wall
3818 check_host_cflags -O3
3819
3820 check_64bit(){
3821     arch32=$1
3822     arch64=$2
3823     expr=$3
3824     check_code cc "" "int test[2*($expr) - 1]" &&
3825         subarch=$arch64 || subarch=$arch32
3826 }
3827
3828 case "$arch" in
3829     aarch64|alpha|ia64)
3830         spic=$shared
3831     ;;
3832     mips)
3833         check_64bit mips mips64 '_MIPS_SIM > 1'
3834         spic=$shared
3835     ;;
3836     parisc)
3837         check_64bit parisc parisc64 'sizeof(void *) > 4'
3838         spic=$shared
3839     ;;
3840     ppc)
3841         check_64bit ppc ppc64 'sizeof(void *) > 4'
3842         spic=$shared
3843     ;;
3844     s390)
3845         check_64bit s390 s390x 'sizeof(void *) > 4'
3846         spic=$shared
3847     ;;
3848     sparc)
3849         check_64bit sparc sparc64 'sizeof(void *) > 4'
3850         spic=$shared
3851     ;;
3852     x86)
3853         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3854         if test "$subarch" = "x86_64"; then
3855             spic=$shared
3856         fi
3857     ;;
3858     ppc)
3859         check_cc <<EOF && subarch="ppc64"
3860         int test[(int)sizeof(char*) - 7];
3861 EOF
3862     ;;
3863 esac
3864
3865 enable $subarch
3866 enabled spic && enable_weak pic
3867
3868 # OS specific
3869 case $target_os in
3870     aix)
3871         SHFLAGS=-shared
3872         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3873         enabled shared && add_ldflags -Wl,-brtl
3874         ;;
3875     android)
3876         disable symver
3877         SLIB_INSTALL_NAME='$(SLIBNAME)'
3878         SLIB_INSTALL_LINKS=
3879         # soname not set on purpose
3880         SHFLAGS=-shared
3881         ;;
3882     haiku)
3883         prefix_default="/boot/common"
3884         network_extralibs="-lnetwork"
3885         host_libs=
3886         ;;
3887     sunos)
3888         SHFLAGS='-shared -Wl,-h,$$(@F)'
3889         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3890         network_extralibs="-lsocket -lnsl"
3891         # When using suncc to build, the Solaris linker will mark
3892         # an executable with each instruction set encountered by
3893         # the Solaris assembler.  As our libraries contain their own
3894         # guards for processor-specific code, instead suppress
3895         # generation of the HWCAPS ELF section on Solaris x86 only.
3896         enabled_all suncc x86 &&
3897             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3898             add_ldflags -Wl,-M,mapfile
3899         nm_default='nm -P -g'
3900         ;;
3901     netbsd)
3902         disable symver
3903         oss_indev_extralibs="-lossaudio"
3904         oss_outdev_extralibs="-lossaudio"
3905         enabled gcc || check_ldflags -Wl,-zmuldefs
3906         ;;
3907     openbsd|bitrig)
3908         disable symver
3909         SHFLAGS='-shared'
3910         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3911         SLIB_INSTALL_LINKS=
3912         oss_indev_extralibs="-lossaudio"
3913         oss_outdev_extralibs="-lossaudio"
3914         ;;
3915     dragonfly)
3916         disable symver
3917         ;;
3918     freebsd)
3919         ;;
3920     bsd/os)
3921         add_extralibs -lpoll -lgnugetopt
3922         strip="strip -d"
3923         ;;
3924     darwin)
3925         test "${as#*gas-preprocessor.pl}" != "$as" || gas="${gas:=gas-preprocessor.pl} ${as:=$cc}"
3926         enabled ppc && add_asflags -force_cpusubtype_ALL
3927         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3928         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3929         strip="${strip} -x"
3930         add_ldflags -Wl,-dynamic,-search_paths_first
3931         SLIBSUF=".dylib"
3932         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3933         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3934         objformat="macho"
3935         enabled x86_64 && objformat="macho64"
3936         enabled_any pic shared ||
3937             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3938         ;;
3939     mingw32*)
3940         if test $target_os = "mingw32ce"; then
3941             disable network
3942         else
3943             target_os=mingw32
3944         fi
3945         LIBTARGET=i386
3946         if enabled x86_64; then
3947             LIBTARGET="i386:x86-64"
3948         elif enabled arm; then
3949             LIBTARGET=arm-wince
3950         fi
3951         enabled shared && ! enabled small && check_cmd $windres --version && enable gnu_windres
3952         check_ldflags -Wl,--nxcompat
3953         check_ldflags -Wl,--dynamicbase
3954         shlibdir_default="$bindir_default"
3955         SLIBPREF=""
3956         SLIBSUF=".dll"
3957         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3958         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3959         dlltool="${cross_prefix}dlltool"
3960         if check_cmd lib.exe -list; then
3961             SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); lib.exe /machine:$(LIBTARGET) /def:$$(@:$(SLIBSUF)=.def) /out:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3962             if enabled x86_64; then
3963                 LIBTARGET=x64
3964             fi
3965         elif check_cmd $dlltool --version; then
3966             SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3967         fi
3968         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3969         SLIB_INSTALL_LINKS=
3970         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3971         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3972         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3973         objformat="win32"
3974         ranlib=:
3975         enable dos_paths
3976         ;;
3977     win32|win64)
3978         disable symver
3979         if enabled shared; then
3980             # Link to the import library instead of the normal static library
3981             # for shared libs.
3982             LD_LIB='%.lib'
3983             # Cannot build both shared and static libs with MSVC or icl.
3984             disable static
3985         fi
3986         shlibdir_default="$bindir_default"
3987         SLIBPREF=""
3988         SLIBSUF=".dll"
3989         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3990         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3991         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3992         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3993         SLIB_INSTALL_LINKS=
3994         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3995         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3996         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3997         objformat="win32"
3998         ranlib=:
3999         enable dos_paths
4000         ;;
4001     cygwin*)
4002         target_os=cygwin
4003         shlibdir_default="$bindir_default"
4004         SLIBPREF="cyg"
4005         SLIBSUF=".dll"
4006         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
4007         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
4008         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4009         SLIB_INSTALL_LINKS=
4010         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
4011         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
4012         objformat="win32"
4013         enable dos_paths
4014         enabled shared && ! enabled small && check_cmd $windres --version && enable gnu_windres
4015         ;;
4016     *-dos|freedos|opendos)
4017         network_extralibs="-lsocket"
4018         objformat="coff"
4019         enable dos_paths
4020         add_cppflags -U__STRICT_ANSI__
4021         ;;
4022     linux)
4023         enable dv1394
4024         ;;
4025     irix*)
4026         target_os=irix
4027         ranlib="echo ignoring ranlib"
4028         ;;
4029     os/2*)
4030         strip="lxlite -CS"
4031         ln_s="cp -f"
4032         objformat="aout"
4033         add_cppflags -D_GNU_SOURCE
4034         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
4035         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
4036         LIBSUF="_s.a"
4037         SLIBPREF=""
4038         SLIBSUF=".dll"
4039         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
4040         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
4041         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
4042             echo PROTMODE >> $(SUBDIR)$(NAME).def; \
4043             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
4044             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
4045             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
4046             emxexp -o $(OBJS) >> $(SUBDIR)$(NAME).def'
4047         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
4048             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
4049         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
4050         enable dos_paths
4051         enable_weak os2threads
4052         ;;
4053     gnu/kfreebsd)
4054         add_cppflags -D_BSD_SOURCE
4055         ;;
4056     gnu)
4057         ;;
4058     qnx)
4059         add_cppflags -D_QNX_SOURCE
4060