Merge remote-tracking branch 'qatar/master'
[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   --libdir=DIR             install libs in DIR [PREFIX/lib]
86   --shlibdir=DIR           install shared libs in DIR [PREFIX/lib]
87   --incdir=DIR             install includes in DIR [PREFIX/include]
88   --mandir=DIR             install man page in DIR [PREFIX/share/man]
89
90 Licensing options:
91   --enable-gpl             allow use of GPL code, the resulting libs
92                            and binaries will be under GPL [no]
93   --enable-version3        upgrade (L)GPL to version 3 [no]
94   --enable-nonfree         allow use of nonfree code, the resulting libs
95                            and binaries will be unredistributable [no]
96
97 Configuration options:
98   --disable-static         do not build static libraries [no]
99   --enable-shared          build shared libraries [no]
100   --enable-small           optimize for size instead of speed
101   --disable-runtime-cpudetect disable detecting cpu capabilities at runtime (smaller binary)
102   --enable-gray            enable full grayscale support (slower color)
103   --disable-swscale-alpha  disable alpha channel support in swscale
104   --disable-all            disable building components, libraries and programs
105
106 Program options:
107   --disable-programs       do not build command line programs
108   --disable-ffmpeg         disable ffmpeg build
109   --disable-ffplay         disable ffplay build
110   --disable-ffprobe        disable ffprobe build
111   --disable-ffserver       disable ffserver build
112
113 Documentation options:
114   --disable-doc            do not build documentation
115   --disable-htmlpages      do not build HTML documentation pages
116   --disable-manpages       do not build man documentation pages
117   --disable-podpages       do not build POD documentation pages
118   --disable-txtpages       do not build text documentation pages
119
120 Component options:
121   --disable-avdevice       disable libavdevice build
122   --disable-avcodec        disable libavcodec build
123   --disable-avformat       disable libavformat build
124   --disable-avutil         disable libavutil build
125   --disable-swresample     disable libswresample build
126   --disable-swscale        disable libswscale build
127   --disable-postproc       disable libpostproc build
128   --disable-avfilter       disable libavfilter build
129   --enable-avresample      enable libavresample build [no]
130   --disable-pthreads       disable pthreads [auto]
131   --disable-w32threads     disable Win32 threads [auto]
132   --disable-os2threads     disable OS/2 threads [auto]
133   --disable-network        disable network support [no]
134   --disable-dct            disable DCT code
135   --disable-dwt            disable DWT code
136   --disable-error-resilience disable error resilience code
137   --disable-lsp            disable LSP code
138   --disable-lzo            disable LZO decoder code
139   --disable-mdct           disable MDCT code
140   --disable-rdft           disable RDFT code
141   --disable-fft            disable FFT code
142
143 Hardware accelerators:
144   --enable-dxva2           enable DXVA2 code
145   --enable-vaapi           enable VAAPI code
146   --enable-vda             enable VDA code
147   --enable-vdpau           enable VDPAU code
148
149 Individual component options:
150   --disable-everything     disable all components listed below
151   --disable-encoder=NAME   disable encoder NAME
152   --enable-encoder=NAME    enable encoder NAME
153   --disable-encoders       disable all encoders
154   --disable-decoder=NAME   disable decoder NAME
155   --enable-decoder=NAME    enable decoder NAME
156   --disable-decoders       disable all decoders
157   --disable-hwaccel=NAME   disable hwaccel NAME
158   --enable-hwaccel=NAME    enable hwaccel NAME
159   --disable-hwaccels       disable all hwaccels
160   --disable-muxer=NAME     disable muxer NAME
161   --enable-muxer=NAME      enable muxer NAME
162   --disable-muxers         disable all muxers
163   --disable-demuxer=NAME   disable demuxer NAME
164   --enable-demuxer=NAME    enable demuxer NAME
165   --disable-demuxers       disable all demuxers
166   --enable-parser=NAME     enable parser NAME
167   --disable-parser=NAME    disable parser NAME
168   --disable-parsers        disable all parsers
169   --enable-bsf=NAME        enable bitstream filter NAME
170   --disable-bsf=NAME       disable bitstream filter NAME
171   --disable-bsfs           disable all bitstream filters
172   --enable-protocol=NAME   enable protocol NAME
173   --disable-protocol=NAME  disable protocol NAME
174   --disable-protocols      disable all protocols
175   --enable-indev=NAME      enable input device NAME
176   --disable-indev=NAME     disable input device NAME
177   --disable-indevs         disable input devices
178   --enable-outdev=NAME     enable output device NAME
179   --disable-outdev=NAME    disable output device NAME
180   --disable-outdevs        disable output devices
181   --disable-devices        disable all devices
182   --enable-filter=NAME     enable filter NAME
183   --disable-filter=NAME    disable filter NAME
184   --disable-filters        disable all filters
185
186 External library support:
187   --enable-avisynth        enable reading of AVISynth script files [no]
188   --enable-bzlib           enable bzlib [autodetect]
189   --enable-fontconfig      enable fontconfig
190   --enable-frei0r          enable frei0r video filtering
191   --enable-gnutls          enable gnutls [no]
192   --enable-iconv           enable iconv [autodetect]
193   --enable-libaacplus      enable AAC+ encoding via libaacplus [no]
194   --enable-libass          enable libass subtitles rendering [no]
195   --enable-libbluray       enable BluRay reading using libbluray [no]
196   --enable-libcaca         enable textual display using libcaca
197   --enable-libcelt         enable CELT decoding via libcelt [no]
198   --enable-libcdio         enable audio CD grabbing with libcdio
199   --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394
200                            and libraw1394 [no]
201   --enable-libfaac         enable AAC encoding via libfaac [no]
202   --enable-libfdk-aac      enable AAC encoding via libfdk-aac [no]
203   --enable-libflite        enable flite (voice synthesis) support via libflite [no]
204   --enable-libfreetype     enable libfreetype [no]
205   --enable-libgsm          enable GSM de/encoding via libgsm [no]
206   --enable-libiec61883     enable iec61883 via libiec61883 [no]
207   --enable-libilbc         enable iLBC de/encoding via libilbc [no]
208   --enable-libmodplug      enable ModPlug via libmodplug [no]
209   --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
210   --enable-libnut          enable NUT (de)muxing via libnut,
211                            native (de)muxer exists [no]
212   --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
213   --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
214   --enable-libopencv       enable video filtering via libopencv [no]
215   --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]
216   --enable-libopus         enable Opus decoding via libopus [no]
217   --enable-libpulse        enable Pulseaudio input via libpulse [no]
218   --enable-libquvi         enable quvi input via libquvi [no]
219   --enable-librtmp         enable RTMP[E] support via librtmp [no]
220   --enable-libschroedinger enable Dirac de/encoding via libschroedinger [no]
221   --enable-libshine        enable fixed-point MP3 encoding via libshine [no]
222   --enable-libsoxr         enable Include libsoxr resampling [no]
223   --enable-libspeex        enable Speex de/encoding via libspeex [no]
224   --enable-libstagefright-h264  enable H.264 decoding via libstagefright [no]
225   --enable-libtheora       enable Theora encoding via libtheora [no]
226   --enable-libtwolame      enable MP2 encoding via libtwolame [no]
227   --enable-libutvideo      enable Ut Video encoding and decoding via libutvideo [no]
228   --enable-libv4l2         enable libv4l2/v4l-utils [no]
229   --enable-libvidstab      enable video stabilization using vid.stab [no]
230   --enable-libvo-aacenc    enable AAC encoding via libvo-aacenc [no]
231   --enable-libvo-amrwbenc  enable AMR-WB encoding via libvo-amrwbenc [no]
232   --enable-libvorbis       enable Vorbis en/decoding via libvorbis,
233                            native implementation exists [no]
234   --enable-libvpx          enable VP8 and VP9 de/encoding via libvpx [no]
235   --enable-libx264         enable H.264 encoding via x264 [no]
236   --enable-libxavs         enable AVS encoding via xavs [no]
237   --enable-libxvid         enable Xvid encoding via xvidcore,
238                            native MPEG-4/Xvid encoder exists [no]
239   --enable-openal          enable OpenAL 1.1 capture support [no]
240   --enable-opencl          enable OpenCL code
241   --enable-openssl         enable openssl [no]
242   --enable-x11grab         enable X11 grabbing [no]
243   --enable-zlib            enable zlib [autodetect]
244
245 Advanced options (experts only):
246   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
247   --enable-cross-compile   assume a cross-compiler is used
248   --sysroot=PATH           root of cross-build tree
249   --sysinclude=PATH        location of cross-build system headers
250   --target-os=OS           compiler targets OS [$target_os]
251   --target-exec=CMD        command to run executables on target
252   --target-path=DIR        path to view of build directory on target
253   --toolchain=NAME         set tool defaults according to NAME
254   --nm=NM                  use nm tool NM [$nm_default]
255   --ar=AR                  use archive tool AR [$ar_default]
256   --as=AS                  use assembler AS [$as_default]
257   --yasmexe=EXE            use yasm-compatible assembler EXE [$yasmexe_default]
258   --cc=CC                  use C compiler CC [$cc_default]
259   --cxx=CXX                use C compiler CXX [$cxx_default]
260   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
261   --ld=LD                  use linker LD [$ld_default]
262   --host-cc=HOSTCC         use host C compiler HOSTCC
263   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
264   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
265   --host-ld=HOSTLD         use host linker HOSTLD
266   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
267   --host-libs=HLIBS        use libs HLIBS when linking for host
268   --host-os=OS             compiler host OS [$target_os]
269   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
270   --extra-cxxflags=ECFLAGS add ECFLAGS to CXXFLAGS [$CXXFLAGS]
271   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
272   --extra-libs=ELIBS       add ELIBS [$ELIBS]
273   --extra-version=STRING   version string suffix []
274   --optflags=OPTFLAGS      override optimization-related compiler flags
275   --build-suffix=SUFFIX    library name suffix []
276   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
277   --progs-suffix=SUFFIX    program name suffix []
278   --arch=ARCH              select architecture [$arch]
279   --cpu=CPU                select the minimum required CPU (affects
280                            instruction selection, may crash on older CPUs)
281   --enable-pic             build position-independent code
282   --enable-sram            allow use of on-chip SRAM
283   --enable-thumb           compile for Thumb instruction set
284   --disable-symver         disable symbol versioning
285   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
286   --disable-safe-bitstream-reader
287                            disable buffer boundary checking in bitreaders
288                            (faster, but may crash)
289   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
290   --enable-lto             use link-time optimization
291
292 Optimization options (experts only):
293   --disable-asm            disable all assembler optimizations
294   --disable-altivec        disable AltiVec optimizations
295   --disable-amd3dnow       disable 3DNow! optimizations
296   --disable-amd3dnowext    disable 3DNow! extended optimizations
297   --disable-mmx            disable MMX optimizations
298   --disable-mmxext         disable MMXEXT optimizations
299   --disable-sse            disable SSE optimizations
300   --disable-sse2           disable SSE2 optimizations
301   --disable-sse3           disable SSE3 optimizations
302   --disable-ssse3          disable SSSE3 optimizations
303   --disable-sse4           disable SSE4 optimizations
304   --disable-sse42          disable SSE4.2 optimizations
305   --disable-avx            disable AVX optimizations
306   --disable-fma4           disable FMA4 optimizations
307   --disable-armv5te        disable armv5te optimizations
308   --disable-armv6          disable armv6 optimizations
309   --disable-armv6t2        disable armv6t2 optimizations
310   --disable-vfp            disable VFP optimizations
311   --disable-neon           disable NEON optimizations
312   --disable-vis            disable VIS optimizations
313   --disable-inline-asm     disable use of inline assembler
314   --disable-yasm           disable use of yasm assembler
315   --disable-mips32r2       disable MIPS32R2 optimizations
316   --disable-mipsdspr1      disable MIPS DSP ASE R1 optimizations
317   --disable-mipsdspr2      disable MIPS DSP ASE R2 optimizations
318   --disable-mipsfpu        disable floating point MIPS optimizations
319   --disable-fast-unaligned consider unaligned accesses slow
320
321 Developer options (useful when working on FFmpeg itself):
322   --disable-debug          disable debugging symbols
323   --enable-debug=LEVEL     set the debug level [$debuglevel]
324   --disable-optimizations  disable compiler optimizations
325   --enable-extra-warnings  enable more compiler warnings
326   --disable-stripping      disable stripping of executables and shared libraries
327   --assert-level=level     0(default), 1 or 2, amount of assertion testing,
328                            2 causes a slowdown at runtime.
329   --enable-memory-poisoning fill heap uninitialized allocated space with arbitrary data
330   --valgrind=VALGRIND      run "make fate" tests through valgrind to detect memory
331                            leaks and errors, using the specified valgrind binary.
332                            Cannot be combined with --target-exec
333   --enable-ftrapv          Trap arithmetic overflows
334   --samples=PATH           location of test samples for FATE, if not set use
335                            \$FATE_SAMPLES at make invocation time.
336   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
337                            should be used only for debugging purposes)
338   --enable-random          randomly enable/disable components
339   --disable-random
340   --enable-random=LIST     randomly enable/disable specific components or
341   --disable-random=LIST    component groups. LIST is a comma-separated list
342                            of NAME[:PROB] entries where NAME is a component
343                            (group) and PROB the probability associated with
344                            NAME (default 0.5).
345   --random-seed=VALUE      seed value for --enable/disable-random
346
347 NOTE: Object files are built at the place where configure is launched.
348 EOF
349   exit 0
350 }
351
352 quotes='""'
353
354 log(){
355     echo "$@" >> $logfile
356 }
357
358 log_file(){
359     log BEGIN $1
360     pr -n -t $1 >> $logfile
361     log END $1
362 }
363
364 echolog(){
365     log "$@"
366     echo "$@"
367 }
368
369 warn(){
370     log "WARNING: $*"
371     WARNINGS="${WARNINGS}WARNING: $*\n"
372 }
373
374 die(){
375     echolog "$@"
376     cat <<EOF
377
378 If you think configure made a mistake, make sure you are using the latest
379 version from Git.  If the latest version fails, report the problem to the
380 ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
381 EOF
382     if disabled logging; then
383         cat <<EOF
384 Rerun configure with logging enabled (do not use --disable-logging), and
385 include the log this produces with your report.
386 EOF
387     else
388         cat <<EOF
389 Include the log file "$logfile" produced by configure as this will help
390 solving the problem.
391 EOF
392     fi
393     exit 1
394 }
395
396 # Avoid locale weirdness, besides we really just want to translate ASCII.
397 toupper(){
398     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
399 }
400
401 tolower(){
402     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
403 }
404
405 c_escape(){
406     echo "$*" | sed 's/["\\]/\\\0/g'
407 }
408
409 sh_quote(){
410     v=$(echo "$1" | sed "s/'/'\\\\''/g")
411     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
412     echo "$v"
413 }
414
415 cleanws(){
416     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
417 }
418
419 filter(){
420     pat=$1
421     shift
422     for v; do
423         eval "case $v in $pat) echo $v ;; esac"
424     done
425 }
426
427 filter_out(){
428     pat=$1
429     shift
430     for v; do
431         eval "case $v in $pat) ;; *) echo $v ;; esac"
432     done
433 }
434
435 map(){
436     m=$1
437     shift
438     for v; do eval $m; done
439 }
440
441 add_suffix(){
442     suffix=$1
443     shift
444     for v; do echo ${v}${suffix}; done
445 }
446
447 set_all(){
448     value=$1
449     shift
450     for var in $*; do
451         eval $var=$value
452     done
453 }
454
455 set_weak(){
456     value=$1
457     shift
458     for var; do
459         eval : \${$var:=$value}
460     done
461 }
462
463 sanitize_var_name(){
464     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
465 }
466
467 set_safe(){
468     var=$1
469     shift
470     eval $(sanitize_var_name "$var")='$*'
471 }
472
473 get_safe(){
474     eval echo \$$(sanitize_var_name "$1")
475 }
476
477 pushvar(){
478     for pvar in $*; do
479         eval level=\${${pvar}_level:=0}
480         eval ${pvar}_${level}="\$$pvar"
481         eval ${pvar}_level=$(($level+1))
482     done
483 }
484
485 popvar(){
486     for pvar in $*; do
487         eval level=\${${pvar}_level:-0}
488         test $level = 0 && continue
489         eval level=$(($level-1))
490         eval $pvar="\${${pvar}_${level}}"
491         eval ${pvar}_level=$level
492         eval unset ${pvar}_${level}
493     done
494 }
495
496 enable(){
497     set_all yes $*
498 }
499
500 disable(){
501     set_all no $*
502 }
503
504 enable_weak(){
505     set_weak yes $*
506 }
507
508 disable_weak(){
509     set_weak no $*
510 }
511
512 enable_safe(){
513     for var; do
514         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
515     done
516 }
517
518 disable_safe(){
519     for var; do
520         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
521     done
522 }
523
524 do_enable_deep(){
525     for var; do
526         enabled $var && continue
527         eval sel="\$${var}_select"
528         eval sgs="\$${var}_suggest"
529         pushvar var sgs
530         enable_deep $sel
531         popvar sgs
532         enable_deep_weak $sgs
533         popvar var
534     done
535 }
536
537 enable_deep(){
538     do_enable_deep $*
539     enable $*
540 }
541
542 enable_deep_weak(){
543     for var; do
544         disabled $var && continue
545         pushvar var
546         do_enable_deep $var
547         popvar var
548         enable_weak $var
549     done
550 }
551
552 enabled(){
553     test "${1#!}" = "$1" && op== || op=!=
554     eval test "x\$${1#!}" $op "xyes"
555 }
556
557 disabled(){
558     test "${1#!}" = "$1" && op== || op=!=
559     eval test "x\$${1#!}" $op "xno"
560 }
561
562 enabled_all(){
563     for opt; do
564         enabled $opt || return 1
565     done
566 }
567
568 disabled_all(){
569     for opt; do
570         disabled $opt || return 1
571     done
572 }
573
574 enabled_any(){
575     for opt; do
576         enabled $opt && return 0
577     done
578 }
579
580 disabled_any(){
581     for opt; do
582         disabled $opt && return 0
583     done
584     return 1
585 }
586
587 set_default(){
588     for opt; do
589         eval : \${$opt:=\$${opt}_default}
590     done
591 }
592
593 is_in(){
594     value=$1
595     shift
596     for var in $*; do
597         [ $var = $value ] && return 0
598     done
599     return 1
600 }
601
602 do_check_deps(){
603     for cfg; do
604         cfg="${cfg#!}"
605         enabled ${cfg}_checking && die "Circular dependency for $cfg."
606         disabled ${cfg}_checking && continue
607         enable ${cfg}_checking
608         append allopts $cfg
609
610         eval dep_all="\$${cfg}_deps"
611         eval dep_any="\$${cfg}_deps_any"
612         eval dep_sel="\$${cfg}_select"
613         eval dep_sgs="\$${cfg}_suggest"
614         eval dep_ifa="\$${cfg}_if"
615         eval dep_ifn="\$${cfg}_if_any"
616
617         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
618         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
619         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
620
621         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
622         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
623         enabled_all  $dep_all || disable $cfg
624         enabled_any  $dep_any || disable $cfg
625         disabled_any $dep_sel && disable $cfg
626
627         if enabled $cfg; then
628             enable_deep $dep_sel
629             enable_deep_weak $dep_sgs
630         fi
631
632         disable ${cfg}_checking
633     done
634 }
635
636 check_deps(){
637     unset allopts
638
639     do_check_deps "$@"
640
641     for cfg in $allopts; do
642         enabled $cfg || continue
643         eval dep_extralibs="\$${cfg}_extralibs"
644         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
645     done
646 }
647
648 print_config(){
649     pfx=$1
650     files=$2
651     shift 2
652     map 'eval echo "$v \${$v:-no}"' "$@" |
653     awk "BEGIN { split(\"$files\", files) }
654         {
655             c = \"$pfx\" toupper(\$1);
656             v = \$2;
657             sub(/yes/, 1, v);
658             sub(/no/,  0, v);
659             for (f in files) {
660                 file = files[f];
661                 if (file ~ /\\.h\$/) {
662                     printf(\"#define %s %d\\n\", c, v) >>file;
663                 } else if (file ~ /\\.asm\$/) {
664                     printf(\"%%define %s %d\\n\", c, v) >>file;
665                 } else if (file ~ /\\.mak\$/) {
666                     n = -v ? \"\" : \"!\";
667                     printf(\"%s%s=yes\\n\", n, c) >>file;
668                 } else if (file ~ /\\.texi\$/) {
669                     pre = -v ? \"\" : \"@c \";
670                     yesno = \$2;
671                     c2 = tolower(c);
672                     gsub(/_/, \"-\", c2);
673                     printf(\"%s@set %s %s\\n\", pre, c2, yesno) >>file;
674                 }
675             }
676         }"
677 }
678
679 print_enabled(){
680     suf=$1
681     shift
682     for v; do
683         enabled $v && printf "%s\n" ${v%$suf};
684     done
685 }
686
687 append(){
688     var=$1
689     shift
690     eval "$var=\"\$$var $*\""
691 }
692
693 prepend(){
694     var=$1
695     shift
696     eval "$var=\"$* \$$var\""
697 }
698
699 add_cppflags(){
700     append CPPFLAGS "$@"
701 }
702
703 add_cflags(){
704     append CFLAGS $($cflags_filter "$@")
705 }
706
707 add_cxxflags(){
708     append CXXFLAGS $($cflags_filter "$@")
709 }
710
711 add_asflags(){
712     append ASFLAGS $($asflags_filter "$@")
713 }
714
715 add_ldflags(){
716     append LDFLAGS $($ldflags_filter "$@")
717 }
718
719 add_extralibs(){
720     prepend extralibs $($ldflags_filter "$@")
721 }
722
723 add_host_cppflags(){
724     append host_cppflags "$@"
725 }
726
727 add_host_cflags(){
728     append host_cflags $($host_cflags_filter "$@")
729 }
730
731 add_host_ldflags(){
732     append host_ldflags $($host_ldflags_filter "$@")
733 }
734
735 add_compat(){
736     append compat_objs $1
737     shift
738     map 'add_cppflags -D$v' "$@"
739 }
740
741 check_cmd(){
742     log "$@"
743     "$@" >> $logfile 2>&1
744 }
745
746 cc_o(){
747     eval printf '%s\\n' $CC_O
748 }
749
750 cc_e(){
751     eval printf '%s\\n' $CC_E
752 }
753
754 check_cc(){
755     log check_cc "$@"
756     cat > $TMPC
757     log_file $TMPC
758     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
759 }
760
761 check_cxx(){
762     log check_cxx "$@"
763     cat > $TMPCPP
764     log_file $TMPCPP
765     check_cmd $cxx $CPPFLAGS $CFLAGS $CXXFLAGS "$@" $CXX_C -o $TMPO $TMPCPP
766 }
767
768 check_cpp(){
769     log check_cpp "$@"
770     cat > $TMPC
771     log_file $TMPC
772     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
773 }
774
775 as_o(){
776     eval printf '%s\\n' $AS_O
777 }
778
779 check_as(){
780     log check_as "$@"
781     cat > $TMPS
782     log_file $TMPS
783     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
784 }
785
786 check_inline_asm(){
787     log check_inline_asm "$@"
788     name="$1"
789     code="$2"
790     shift 2
791     disable $name
792     check_cc "$@" <<EOF && enable $name
793 void foo(void){ __asm__ volatile($code); }
794 EOF
795 }
796
797 check_insn(){
798     log check_insn "$@"
799     check_inline_asm ${1}_inline "\"$2\""
800     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
801 }
802
803 check_yasm(){
804     log check_yasm "$@"
805     echo "$1" > $TMPS
806     log_file $TMPS
807     shift 1
808     check_cmd $yasmexe $YASMFLAGS -Werror "$@" -o $TMPO $TMPS
809 }
810
811 ld_o(){
812     eval printf '%s\\n' $LD_O
813 }
814
815 check_ld(){
816     log check_ld "$@"
817     type=$1
818     shift 1
819     flags=$(filter_out '-l*|*.so' $@)
820     libs=$(filter '-l*|*.so' $@)
821     check_$type $($cflags_filter $flags) || return
822     flags=$($ldflags_filter $flags)
823     libs=$($ldflags_filter $libs)
824     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
825 }
826
827 check_code(){
828     log check_code "$@"
829     check=$1
830     headers=$2
831     code=$3
832     shift 3
833     {
834         for hdr in $headers; do
835             echo "#include <$hdr>"
836         done
837         echo "int main(void) { $code; return 0; }"
838     } | check_$check "$@"
839 }
840
841 check_cppflags(){
842     log check_cppflags "$@"
843     check_cc "$@" <<EOF && append CPPFLAGS "$@"
844 int x;
845 EOF
846 }
847
848 check_cflags(){
849     log check_cflags "$@"
850     set -- $($cflags_filter "$@")
851     check_cc "$@" <<EOF && append CFLAGS "$@"
852 int x;
853 EOF
854 }
855
856 check_cxxflags(){
857     log check_cxxflags "$@"
858     set -- $($cflags_filter "$@")
859     check_cxx "$@" <<EOF && append CXXFLAGS "$@"
860 int x;
861 EOF
862 }
863
864 test_ldflags(){
865     log test_ldflags "$@"
866     check_ld "cc" "$@" <<EOF
867 int main(void){ return 0; }
868 EOF
869 }
870
871 check_ldflags(){
872     log check_ldflags "$@"
873     test_ldflags "$@" && add_ldflags "$@"
874 }
875
876 check_header(){
877     log check_header "$@"
878     header=$1
879     shift
880     disable_safe $header
881     check_cpp "$@" <<EOF && enable_safe $header
882 #include <$header>
883 int x;
884 EOF
885 }
886
887 check_func(){
888     log check_func "$@"
889     func=$1
890     shift
891     disable $func
892     check_ld "cc" "$@" <<EOF && enable $func
893 extern int $func();
894 int main(void){ $func(); }
895 EOF
896 }
897
898 check_mathfunc(){
899     log check_mathfunc "$@"
900     func=$1
901     narg=$2
902     shift 2
903     test $narg = 2 && args="f, g" || args="f"
904     disable $func
905     check_ld "cc" "$@" <<EOF && enable $func
906 #include <math.h>
907 float foo(float f, float g) { return $func($args); }
908 int main(void){ return (int) foo; }
909 EOF
910 }
911
912 check_func_headers(){
913     log check_func_headers "$@"
914     headers=$1
915     funcs=$2
916     shift 2
917     {
918         for hdr in $headers; do
919             echo "#include <$hdr>"
920         done
921         for func in $funcs; do
922             echo "long check_$func(void) { return (long) $func; }"
923         done
924         echo "int main(void) { return 0; }"
925     } | check_ld "cc" "$@" && enable $funcs && enable_safe $headers
926 }
927
928 check_class_headers_cpp(){
929     log check_class_headers_cpp "$@"
930     headers=$1
931     classes=$2
932     shift 2
933     {
934         for hdr in $headers; do
935             echo "#include <$hdr>"
936         done
937         echo "int main(void) { "
938         i=1
939         for class in $classes; do
940             echo "$class obj$i;"
941             i=$(expr $i + 1)
942         done
943         echo "return 0; }"
944     } | check_ld "cxx" "$@" && enable $funcs && enable_safe $headers
945 }
946
947 check_cpp_condition(){
948     log check_cpp_condition "$@"
949     header=$1
950     condition=$2
951     shift 2
952     check_cpp "$@" <<EOF
953 #include <$header>
954 #if !($condition)
955 #error "unsatisfied condition: $condition"
956 #endif
957 EOF
958 }
959
960 check_lib(){
961     log check_lib "$@"
962     header="$1"
963     func="$2"
964     shift 2
965     check_header $header && check_func $func "$@" && add_extralibs "$@"
966 }
967
968 check_lib2(){
969     log check_lib2 "$@"
970     headers="$1"
971     funcs="$2"
972     shift 2
973     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
974 }
975
976 check_lib_cpp(){
977     log check_lib_cpp "$@"
978     headers="$1"
979     classes="$2"
980     shift 2
981     check_class_headers_cpp "$headers" "$classes" "$@" && add_extralibs "$@"
982 }
983
984 check_pkg_config(){
985     log check_pkg_config "$@"
986     pkg="$1"
987     headers="$2"
988     funcs="$3"
989     shift 3
990     $pkg_config --exists $pkg 2>/dev/null || return
991     pkg_cflags=$($pkg_config --cflags $pkg)
992     pkg_libs=$($pkg_config --libs $pkg)
993     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
994         set_safe ${pkg}_cflags $pkg_cflags   &&
995         set_safe ${pkg}_libs   $pkg_libs
996 }
997
998 check_exec(){
999     check_ld "cc" "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1000 }
1001
1002 check_exec_crash(){
1003     code=$(cat)
1004
1005     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1006     # are safe but may not be available everywhere.  Thus we use
1007     # raise(SIGTERM) instead.  The check is run in a subshell so we
1008     # can redirect the "Terminated" message from the shell.  SIGBUS
1009     # is not defined by standard C so it is used conditionally.
1010
1011     (check_exec "$@") >> $logfile 2>&1 <<EOF
1012 #include <signal.h>
1013 static void sighandler(int sig){
1014     raise(SIGTERM);
1015 }
1016 int func(void){
1017     $code
1018 }
1019 int (*func_ptr)(void) = func;
1020 int main(void){
1021     signal(SIGILL, sighandler);
1022     signal(SIGFPE, sighandler);
1023     signal(SIGSEGV, sighandler);
1024 #ifdef SIGBUS
1025     signal(SIGBUS, sighandler);
1026 #endif
1027     return func_ptr();
1028 }
1029 EOF
1030 }
1031
1032 check_type(){
1033     log check_type "$@"
1034     headers=$1
1035     type=$2
1036     shift 2
1037     disable_safe "$type"
1038     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1039 }
1040
1041 check_struct(){
1042     log check_struct "$@"
1043     headers=$1
1044     struct=$2
1045     member=$3
1046     shift 3
1047     disable_safe "${struct}_${member}"
1048     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1049         enable_safe "${struct}_${member}"
1050 }
1051
1052 check_builtin(){
1053     log check_builtin "$@"
1054     name=$1
1055     headers=$2
1056     builtin=$3
1057     shift 3
1058     disable "$name"
1059     check_code ld "$headers" "$builtin" "cc" "$@" && enable "$name"
1060 }
1061
1062 require(){
1063     name="$1"
1064     header="$2"
1065     func="$3"
1066     shift 3
1067     check_lib $header $func "$@" || die "ERROR: $name not found"
1068 }
1069
1070 require2(){
1071     name="$1"
1072     headers="$2"
1073     func="$3"
1074     shift 3
1075     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1076 }
1077
1078 require_cpp(){
1079     name="$1"
1080     headers="$2"
1081     classes="$3"
1082     shift 3
1083     check_lib_cpp "$headers" "$classes" "$@" || die "ERROR: $name not found"
1084 }
1085
1086 require_pkg_config(){
1087     pkg="$1"
1088     check_pkg_config "$@" || die "ERROR: $pkg not found"
1089     add_cflags    $(get_safe ${pkg}_cflags)
1090     add_extralibs $(get_safe ${pkg}_libs)
1091 }
1092
1093 hostcc_o(){
1094     eval printf '%s\\n' $HOSTCC_O
1095 }
1096
1097 check_host_cc(){
1098     log check_host_cc "$@"
1099     cat > $TMPC
1100     log_file $TMPC
1101     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1102 }
1103
1104 check_host_cppflags(){
1105     log check_host_cppflags "$@"
1106     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1107 int x;
1108 EOF
1109 }
1110
1111 check_host_cflags(){
1112     log check_host_cflags "$@"
1113     set -- $($host_cflags_filter "$@")
1114     check_host_cc "$@" <<EOF && append host_cflags "$@"
1115 int x;
1116 EOF
1117 }
1118
1119 apply(){
1120     file=$1
1121     shift
1122     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1123 }
1124
1125 cp_if_changed(){
1126     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1127     mkdir -p "$(dirname $2)"
1128     $cp_f "$1" "$2"
1129 }
1130
1131 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1132 # system-dependent things.
1133
1134 COMPONENT_LIST="
1135     bsfs
1136     decoders
1137     demuxers
1138     encoders
1139     filters
1140     hwaccels
1141     indevs
1142     muxers
1143     outdevs
1144     parsers
1145     protocols
1146 "
1147
1148 EXTERNAL_LIBRARY_LIST="
1149     avisynth
1150     bzlib
1151     crystalhd
1152     fontconfig
1153     frei0r
1154     gnutls
1155     iconv
1156     libaacplus
1157     libass
1158     libbluray
1159     libcaca
1160     libcdio
1161     libcelt
1162     libdc1394
1163     libfaac
1164     libfdk_aac
1165     libflite
1166     libfreetype
1167     libgsm
1168     libiec61883
1169     libilbc
1170     libmodplug
1171     libmp3lame
1172     libnut
1173     libopencore_amrnb
1174     libopencore_amrwb
1175     libopencv
1176     libopenjpeg
1177     libopus
1178     libpulse
1179     libquvi
1180     librtmp
1181     libschroedinger
1182     libshine
1183     libsoxr
1184     libspeex
1185     libstagefright_h264
1186     libtheora
1187     libtwolame
1188     libutvideo
1189     libv4l2
1190     libvidstab
1191     libvo_aacenc
1192     libvo_amrwbenc
1193     libvorbis
1194     libvpx
1195     libx264
1196     libxavs
1197     libxvid
1198     openal
1199     opencl
1200     openssl
1201     x11grab
1202     zlib
1203 "
1204
1205 DOCUMENT_LIST="
1206     doc
1207     htmlpages
1208     manpages
1209     podpages
1210     txtpages
1211 "
1212
1213 HWACCEL_LIST="
1214     dxva2
1215     vaapi
1216     vda
1217     vdpau
1218 "
1219
1220 LIBRARY_LIST="
1221     avcodec
1222     avdevice
1223     avfilter
1224     avformat
1225     avresample
1226     avutil
1227     postproc
1228     swresample
1229     swscale
1230 "
1231
1232 PROGRAM_LIST="
1233     ffplay
1234     ffprobe
1235     ffserver
1236     ffmpeg
1237 "
1238
1239 CONFIG_LIST="
1240     $COMPONENT_LIST
1241     $DOCUMENT_LIST
1242     $EXTERNAL_LIBRARY_LIST
1243     $HWACCEL_LIST
1244     $LIBRARY_LIST
1245     $PROGRAM_LIST
1246     dct
1247     dwt
1248     error_resilience
1249     fast_unaligned
1250     fft
1251     ftrapv
1252     gpl
1253     gray
1254     hardcoded_tables
1255     incompatible_fork_abi
1256     lsp
1257     lzo
1258     mdct
1259     memalign_hack
1260     memory_poisoning
1261     network
1262     nonfree
1263     pic
1264     rdft
1265     runtime_cpudetect
1266     safe_bitstream_reader
1267     shared
1268     small
1269     sram
1270     static
1271     swscale_alpha
1272     thumb
1273     version3
1274     xmm_clobber_test
1275 "
1276
1277 THREADS_LIST='
1278     pthreads
1279     w32threads
1280     os2threads
1281 '
1282
1283 ATOMICS_LIST='
1284     atomics_gcc
1285     atomics_suncc
1286     atomics_win32
1287 '
1288
1289 ARCH_LIST='
1290     aarch64
1291     alpha
1292     arm
1293     avr32
1294     avr32_ap
1295     avr32_uc
1296     bfin
1297     ia64
1298     m68k
1299     mips
1300     mips64
1301     parisc
1302     ppc
1303     ppc64
1304     s390
1305     sh4
1306     sparc
1307     sparc64
1308     tilegx
1309     tilepro
1310     tomi
1311     x86
1312     x86_32
1313     x86_64
1314 '
1315
1316 ARCH_EXT_LIST_ARM='
1317     armv5te
1318     armv6
1319     armv6t2
1320     neon
1321     vfp
1322     vfpv3
1323 '
1324
1325 ARCH_EXT_LIST_X86='
1326     amd3dnow
1327     amd3dnowext
1328     avx
1329     fma4
1330     mmx
1331     mmxext
1332     sse
1333     sse2
1334     sse3
1335     sse4
1336     sse42
1337     ssse3
1338 '
1339
1340 ARCH_EXT_LIST="
1341     $ARCH_EXT_LIST_ARM
1342     $ARCH_EXT_LIST_X86
1343     altivec
1344     ppc4xx
1345     vis
1346     mipsfpu
1347     mips32r2
1348     mipsdspr1
1349     mipsdspr2
1350 "
1351
1352 HAVE_LIST_CMDLINE='
1353     inline_asm
1354     symver
1355     yasm
1356 '
1357
1358 HAVE_LIST_PUB='
1359     bigendian
1360     fast_unaligned
1361     incompatible_fork_abi
1362 '
1363
1364 MATH_FUNCS="
1365     atanf
1366     atan2f
1367     cbrt
1368     cbrtf
1369     cosf
1370     exp2
1371     exp2f
1372     expf
1373     isinf
1374     isnan
1375     ldexpf
1376     llrint
1377     llrintf
1378     log2
1379     log2f
1380     log10f
1381     lrint
1382     lrintf
1383     powf
1384     rint
1385     round
1386     roundf
1387     sinf
1388     trunc
1389     truncf
1390 "
1391
1392 HAVE_LIST="
1393     $ARCH_EXT_LIST
1394     $(add_suffix _external $ARCH_EXT_LIST)
1395     $(add_suffix _inline   $ARCH_EXT_LIST)
1396     $HAVE_LIST_CMDLINE
1397     $HAVE_LIST_PUB
1398     $THREADS_LIST
1399     $ATOMICS_LIST
1400     $MATH_FUNCS
1401     access
1402     aligned_malloc
1403     aligned_stack
1404     alsa_asoundlib_h
1405     altivec_h
1406     arpa_inet_h
1407     asm_mod_q
1408     asm_mod_y
1409     asm_types_h
1410     atomic_cas_ptr
1411     atomics_native
1412     attribute_may_alias
1413     attribute_packed
1414     cdio_paranoia_h
1415     cdio_paranoia_paranoia_h
1416     CL_cl_h
1417     clock_gettime
1418     closesocket
1419     cmov
1420     CommandLineToArgvW
1421     cpunop
1422     CryptGenRandom
1423     dcbzl
1424     dev_bktr_ioctl_bt848_h
1425     dev_bktr_ioctl_meteor_h
1426     dev_ic_bt8xx_h
1427     dev_video_bktr_ioctl_bt848_h
1428     dev_video_meteor_ioctl_meteor_h
1429     direct_h
1430     dlfcn_h
1431     dlopen
1432     dos_paths
1433     dxva_h
1434     ebp_available
1435     ebx_available
1436     fast_64bit
1437     fast_clz
1438     fast_cmov
1439     fcntl
1440     fork
1441     getaddrinfo
1442     gethrtime
1443     getopt
1444     GetProcessAffinityMask
1445     GetProcessMemoryInfo
1446     GetProcessTimes
1447     GetSystemTimeAsFileTime
1448     getrusage
1449     getservbyport
1450     gettimeofday
1451     glob
1452     gnu_as
1453     gsm_h
1454     ibm_asm
1455     inet_aton
1456     io_h
1457     isatty
1458     jack_port_get_latency_range
1459     kbhit
1460     ldbrx
1461     libdc1394_1
1462     libdc1394_2
1463     local_aligned_16
1464     local_aligned_8
1465     localtime_r
1466     loongson
1467     lzo1x_999_compress
1468     machine_ioctl_bt848_h
1469     machine_ioctl_meteor_h
1470     machine_rw_barrier
1471     makeinfo
1472     malloc_h
1473     MapViewOfFile
1474     memalign
1475     MemoryBarrier
1476     mkstemp
1477     mm_empty
1478     mmap
1479     mprotect
1480     msvcrt
1481     nanosleep
1482     openjpeg_1_5_openjpeg_h
1483     PeekNamedPipe
1484     perl
1485     pod2man
1486     poll_h
1487     posix_memalign
1488     pthread_cancel
1489     rdtsc
1490     rsync_contimeout
1491     sched_getaffinity
1492     sdl
1493     SetConsoleTextAttribute
1494     setmode
1495     setrlimit
1496     Sleep
1497     sndio_h
1498     socklen_t
1499     soundcard_h
1500     strerror_r
1501     struct_addrinfo
1502     struct_group_source_req
1503     struct_ip_mreq_source
1504     struct_ipv6_mreq
1505     struct_pollfd
1506     struct_rusage_ru_maxrss
1507     struct_sctp_event_subscribe
1508     struct_sockaddr_in6
1509     struct_sockaddr_sa_len
1510     struct_sockaddr_storage
1511     struct_v4l2_frmivalenum_discrete
1512     symver_asm_label
1513     symver_gnu_asm
1514     sync_val_compare_and_swap
1515     sysconf
1516     sysctl
1517     sys_mman_h
1518     sys_param_h
1519     sys_resource_h
1520     sys_select_h
1521     sys_soundcard_h
1522     sys_time_h
1523     sys_videoio_h
1524     termios_h
1525     texi2html
1526     threads
1527     unistd_h
1528     usleep
1529     vfp_args
1530     VirtualAlloc
1531     windows_h
1532     winsock2_h
1533     xform_asm
1534     xmm_clobbers
1535 "
1536
1537 # options emitted with CONFIG_ prefix but not available on the command line
1538 CONFIG_EXTRA="
1539     aandcttables
1540     ac3dsp
1541     audio_frame_queue
1542     dsputil
1543     frame_thread_encoder
1544     gcrypt
1545     golomb
1546     gplv3
1547     h264chroma
1548     h264dsp
1549     h264pred
1550     h264qpel
1551     hpeldsp
1552     huffman
1553     lgplv3
1554     lpc
1555     mpegaudio
1556     mpegaudiodsp
1557     mpegvideo
1558     mpegvideoenc
1559     nettle
1560     rangecoder
1561     rtpdec
1562     rtpenc_chain
1563     sinewin
1564     videodsp
1565     vp3dsp
1566 "
1567
1568 CMDLINE_SELECT="
1569     $ARCH_EXT_LIST
1570     $CONFIG_LIST
1571     $HAVE_LIST_CMDLINE
1572     $THREADS_LIST
1573     asm
1574     cross_compile
1575     debug
1576     extra_warnings
1577     logging
1578     lto
1579     optimizations
1580     stripping
1581 "
1582
1583 PATHS_LIST='
1584     bindir
1585     datadir
1586     incdir
1587     libdir
1588     mandir
1589     prefix
1590     shlibdir
1591 '
1592
1593 CMDLINE_SET="
1594     $PATHS_LIST
1595     ar
1596     arch
1597     as
1598     assert_level
1599     build_suffix
1600     cc
1601     cpu
1602     cross_prefix
1603     cxx
1604     dep_cc
1605     extra_version
1606     host_cc
1607     host_cflags
1608     host_ld
1609     host_ldflags
1610     host_libs
1611     host_os
1612     install
1613     ld
1614     logfile
1615     malloc_prefix
1616     nm
1617     optflags
1618     pkg_config
1619     progs_suffix
1620     random_seed
1621     samples
1622     strip
1623     sysinclude
1624     sysroot
1625     target_exec
1626     target_os
1627     target_path
1628     toolchain
1629     valgrind
1630     yasmexe
1631 "
1632
1633 CMDLINE_APPEND="
1634     extra_cflags
1635     extra_cxxflags
1636     host_cppflags
1637 "
1638
1639 # code dependency declarations
1640
1641 # architecture extensions
1642
1643 armv5te_deps="arm"
1644 armv6_deps="arm"
1645 armv6t2_deps="arm"
1646 neon_deps="arm"
1647 vfp_deps="arm"
1648 vfpv3_deps="vfp"
1649
1650 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1651
1652 mipsfpu_deps="mips"
1653 mips32r2_deps="mips"
1654 mipsdspr1_deps="mips"
1655 mipsdspr2_deps="mips"
1656
1657 altivec_deps="ppc"
1658 ppc4xx_deps="ppc"
1659
1660 vis_deps="sparc"
1661
1662 x86_64_suggest="cmov fast_cmov"
1663
1664 amd3dnow_deps="mmx"
1665 amd3dnowext_deps="amd3dnow"
1666 mmx_deps="x86"
1667 mmxext_deps="mmx"
1668 sse_deps="mmxext"
1669 sse2_deps="sse"
1670 sse3_deps="sse2"
1671 ssse3_deps="sse3"
1672 sse4_deps="ssse3"
1673 sse42_deps="sse4"
1674 avx_deps="sse42"
1675 fma4_deps="avx"
1676
1677 mmx_external_deps="yasm"
1678 mmx_inline_deps="inline_asm"
1679 mmx_suggest="mmx_external mmx_inline"
1680
1681 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86); do
1682     eval dep=\$${ext}_deps
1683     eval ${ext}_external_deps='"${dep}_external"'
1684     eval ${ext}_inline_deps='"${dep}_inline"'
1685     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1686 done
1687
1688 aligned_stack_if_any="ppc x86"
1689 fast_64bit_if_any="alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1690 fast_clz_if_any="alpha avr32 mips ppc x86"
1691 fast_unaligned_if_any="ppc x86"
1692
1693 inline_asm_deps="!tms470"
1694 need_memalign="altivec neon sse"
1695
1696 symver_if_any="symver_asm_label symver_gnu_asm"
1697
1698 log2_deps="!msvcrt"
1699
1700 # subsystems
1701 dct_select="rdft"
1702 error_resilience_select="dsputil"
1703 frame_thread_encoder_deps="encoders threads"
1704 lpc_select="dsputil"
1705 mdct_select="fft"
1706 rdft_select="fft"
1707 mpegaudio_select="mpegaudiodsp"
1708 mpegaudiodsp_select="dct"
1709 mpegvideo_select="dsputil h264chroma hpeldsp videodsp"
1710 mpegvideoenc_select="mpegvideo"
1711
1712 # decoders / encoders
1713 aac_decoder_select="mdct sinewin"
1714 aac_encoder_select="audio_frame_queue mdct sinewin"
1715 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1716 ac3_decoder_select="mdct ac3dsp ac3_parser dsputil"
1717 ac3_encoder_select="mdct ac3dsp dsputil"
1718 ac3_fixed_encoder_select="mdct ac3dsp dsputil"
1719 alac_encoder_select="lpc"
1720 als_decoder_select="dsputil"
1721 amrnb_decoder_select="lsp"
1722 amrwb_decoder_select="lsp"
1723 amv_decoder_select="dsputil hpeldsp"
1724 amv_encoder_select="aandcttables"
1725 ape_decoder_select="dsputil"
1726 asv1_decoder_select="dsputil"
1727 asv1_encoder_select="dsputil"
1728 asv2_decoder_select="dsputil"
1729 asv2_encoder_select="dsputil"
1730 atrac1_decoder_select="mdct sinewin"
1731 atrac3_decoder_select="mdct"
1732 bink_decoder_select="dsputil hpeldsp"
1733 binkaudio_dct_decoder_select="mdct rdft dct sinewin"
1734 binkaudio_rdft_decoder_select="mdct rdft sinewin"
1735 cavs_decoder_select="dsputil golomb h264chroma videodsp"
1736 cllc_decoder_select="dsputil"
1737 comfortnoise_encoder_select="lpc"
1738 cook_decoder_select="dsputil mdct sinewin"
1739 cscd_decoder_select="lzo"
1740 cscd_decoder_suggest="zlib"
1741 dca_decoder_select="mdct"
1742 dirac_decoder_select="dsputil dwt golomb videodsp"
1743 dnxhd_decoder_select="dsputil"
1744 dnxhd_encoder_select="aandcttables dsputil mpegvideoenc"
1745 dvvideo_decoder_select="dsputil"
1746 dvvideo_encoder_select="dsputil"
1747 dxa_decoder_select="zlib"
1748 eac3_decoder_select="ac3_decoder"
1749 eac3_encoder_select="ac3_encoder"
1750 eamad_decoder_select="aandcttables dsputil mpegvideo"
1751 eatgq_decoder_select="aandcttables"
1752 eatqi_decoder_select="aandcttables error_resilience mpegvideo"
1753 exr_decoder_select="zlib"
1754 ffv1_decoder_select="dsputil golomb rangecoder"
1755 ffv1_encoder_select="dsputil rangecoder"
1756 ffvhuff_decoder_select="dsputil"
1757 ffvhuff_encoder_select="dsputil huffman"
1758 flac_decoder_select="golomb"
1759 flac_encoder_select="dsputil golomb lpc"
1760 flashsv_decoder_select="zlib"
1761 flashsv_encoder_select="zlib"
1762 flashsv2_encoder_select="zlib"
1763 flashsv2_decoder_select="zlib"
1764 flv_decoder_select="h263_decoder"
1765 flv_encoder_select="h263_encoder"
1766 fourxm_decoder_select="dsputil"
1767 fraps_decoder_select="dsputil huffman"
1768 g729_decoder_select="dsputil"
1769 h261_decoder_select="error_resilience mpegvideo"
1770 h261_encoder_select="aandcttables mpegvideoenc"
1771 h263_decoder_select="error_resilience h263_parser mpegvideo"
1772 h263_encoder_select="aandcttables mpegvideoenc"
1773 h263i_decoder_select="h263_decoder"
1774 h263p_encoder_select="h263_encoder"
1775 h264_decoder_select="golomb h264chroma h264dsp h264pred h264qpel videodsp"
1776 h264_decoder_suggest="error_resilience"
1777 huffyuv_decoder_select="dsputil"
1778 huffyuv_encoder_select="dsputil huffman"
1779 iac_decoder_select="dsputil fft mdct sinewin"
1780 imc_decoder_select="dsputil fft mdct sinewin"
1781 indeo3_decoder_select="hpeldsp"
1782 interplay_video_decoder_select="hpeldsp"
1783 jpegls_decoder_select="dsputil golomb hpeldsp"
1784 jpegls_encoder_select="golomb"
1785 jv_decoder_select="dsputil"
1786 lagarith_decoder_select="dsputil"
1787 ljpeg_encoder_select="aandcttables mpegvideoenc"
1788 loco_decoder_select="golomb"
1789 mdec_decoder_select="dsputil error_resilience mpegvideo"
1790 mimic_decoder_select="dsputil hpeldsp"
1791 mjpeg_decoder_select="dsputil hpeldsp"
1792 mjpegb_decoder_select="dsputil hpeldsp"
1793 mjpeg_encoder_select="aandcttables dsputil mpegvideoenc"
1794 mlp_decoder_select="dsputil mlp_parser"
1795 motionpixels_decoder_select="dsputil"
1796 mp1_decoder_select="mpegaudio"
1797 mp1float_decoder_select="mpegaudio"
1798 mp2_decoder_select="mpegaudio"
1799 mp2float_decoder_select="mpegaudio"
1800 mp3_decoder_select="mpegaudio"
1801 mp3adu_decoder_select="mpegaudio"
1802 mp3adufloat_decoder_select="mpegaudio"
1803 mp3float_decoder_select="mpegaudio"
1804 mp3on4_decoder_select="mpegaudio"
1805 mp3on4float_decoder_select="mpegaudio"
1806 mpc7_decoder_select="dsputil mpegaudiodsp"
1807 mpc8_decoder_select="dsputil mpegaudiodsp"
1808 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
1809 mpeg_xvmc_decoder_select="mpeg2video_decoder"
1810 mpeg1video_decoder_select="error_resilience mpegvideo"
1811 mpeg1video_encoder_select="aandcttables mpegvideoenc"
1812 mpeg2video_decoder_select="error_resilience mpegvideo"
1813 mpeg2video_encoder_select="aandcttables mpegvideoenc"
1814 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
1815 mpeg4_encoder_select="h263_encoder"
1816 msmpeg4v1_decoder_select="h263_decoder"
1817 msmpeg4v2_decoder_select="h263_decoder"
1818 msmpeg4v2_encoder_select="h263_encoder"
1819 msmpeg4v3_decoder_select="h263_decoder"
1820 msmpeg4v3_encoder_select="h263_encoder"
1821 mss2_decoder_select="error_resilience vc1_decoder"
1822 mxpeg_decoder_select="dsputil hpeldsp"
1823 nellymoser_decoder_select="mdct sinewin"
1824 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
1825 nuv_decoder_select="dsputil lzo"
1826 png_decoder_select="zlib"
1827 png_encoder_select="dsputil zlib"
1828 prores_decoder_select="dsputil"
1829 prores_encoder_select="dsputil"
1830 qcelp_decoder_select="lsp"
1831 qdm2_decoder_select="mdct rdft mpegaudiodsp"
1832 ra_144_encoder_select="audio_frame_queue lpc"
1833 ralf_decoder_select="golomb"
1834 rtjpeg_decoder_select="dsputil"
1835 rv10_decoder_select="error_resilience h263_decoder"
1836 rv10_encoder_select="h263_encoder"
1837 rv20_decoder_select="error_resilience h263_decoder"
1838 rv20_encoder_select="h263_encoder"
1839 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpegvideo videodsp"
1840 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpegvideo videodsp"
1841 shorten_decoder_select="golomb"
1842 sipr_decoder_select="lsp"
1843 snow_decoder_select="dsputil dwt h264qpel hpeldsp rangecoder"
1844 snow_encoder_select="aandcttables dsputil dwt h264qpel hpeldsp mpegvideoenc rangecoder"
1845 sonic_decoder_select="golomb"
1846 sonic_encoder_select="golomb"
1847 sonic_ls_encoder_select="golomb"
1848 sp5x_decoder_select="dsputil hpeldsp"
1849 svq1_decoder_select="hpeldsp"
1850 svq1_encoder_select="aandcttables dsputil hpeldsp mpegvideoenc"
1851 svq3_decoder_select="golomb h264chroma h264dsp h264pred h264qpel hpeldsp mpegvideo videodsp"
1852 svq3_decoder_suggest="error_resilience zlib"
1853 tak_decoder_select="dsputil"
1854 theora_decoder_select="vp3_decoder"
1855 tiff_decoder_suggest="zlib"
1856 tiff_encoder_suggest="zlib"
1857 thp_decoder_select="dsputil hpeldsp"
1858 truehd_decoder_select="mlp_parser"
1859 truemotion2_decoder_select="dsputil"
1860 truespeech_decoder_select="dsputil"
1861 tscc_decoder_select="zlib"
1862 twinvq_decoder_select="mdct lsp sinewin"
1863 utvideo_decoder_select="dsputil"
1864 utvideo_encoder_select="dsputil huffman"
1865 vble_decoder_select="dsputil"
1866 vc1_decoder_select="error_resilience h263_decoder h264chroma h264qpel"
1867 vc1image_decoder_select="vc1_decoder"
1868 vorbis_decoder_select="mdct"
1869 vorbis_encoder_select="mdct"
1870 vp3_decoder_select="hpeldsp vp3dsp videodsp"
1871 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp"
1872 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp"
1873 vp6a_decoder_select="vp6_decoder"
1874 vp6f_decoder_select="vp6_decoder"
1875 vp8_decoder_select="h264pred videodsp"
1876 wmapro_decoder_select="mdct sinewin"
1877 wmav1_decoder_select="mdct sinewin"
1878 wmav1_encoder_select="mdct sinewin"
1879 wmav2_decoder_select="mdct sinewin"
1880 wmav2_encoder_select="mdct sinewin"
1881 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
1882 wmv1_decoder_select="h263_decoder"
1883 wmv1_encoder_select="h263_encoder"
1884 wmv2_decoder_select="h263_decoder videodsp"
1885 wmv2_encoder_select="h263_encoder"
1886 wmv3_decoder_select="vc1_decoder"
1887 wmv3image_decoder_select="wmv3_decoder"
1888 zerocodec_decoder_select="zlib"
1889 zlib_decoder_select="zlib"
1890 zlib_encoder_select="zlib"
1891 zmbv_decoder_select="zlib"
1892 zmbv_encoder_select="zlib"
1893
1894 # hardware accelerators
1895 crystalhd_deps="libcrystalhd_libcrystalhd_if_h"
1896 dxva2_deps="dxva2api_h"
1897 vaapi_deps="va_va_h"
1898 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
1899 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
1900 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
1901
1902 h263_vaapi_hwaccel_deps="vaapi"
1903 h263_vaapi_hwaccel_select="h263_decoder"
1904 h263_vdpau_hwaccel_deps="vdpau"
1905 h263_vdpau_hwaccel_select="h263_decoder"
1906 h264_crystalhd_decoder_select="crystalhd h264_mp4toannexb_bsf h264_parser"
1907 h264_dxva2_hwaccel_deps="dxva2"
1908 h264_dxva2_hwaccel_select="h264_decoder"
1909 h264_vaapi_hwaccel_deps="vaapi"
1910 h264_vaapi_hwaccel_select="h264_decoder"
1911 h264_vda_decoder_deps="vda"
1912 h264_vda_decoder_select="h264_decoder"
1913 h264_vda_hwaccel_deps="vda"
1914 h264_vda_hwaccel_select="h264_decoder"
1915 h264_vdpau_decoder_deps="vdpau"
1916 h264_vdpau_decoder_select="h264_decoder"
1917 h264_vdpau_hwaccel_deps="vdpau"
1918 h264_vdpau_hwaccel_select="h264_decoder"
1919 mpeg_vdpau_decoder_deps="vdpau"
1920 mpeg_vdpau_decoder_select="mpeg2video_decoder"
1921 mpeg1_vdpau_decoder_deps="vdpau"
1922 mpeg1_vdpau_decoder_select="mpeg1video_decoder"
1923 mpeg1_vdpau_hwaccel_deps="vdpau"
1924 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
1925 mpeg2_crystalhd_decoder_select="crystalhd"
1926 mpeg2_dxva2_hwaccel_deps="dxva2"
1927 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
1928 mpeg2_vaapi_hwaccel_deps="vaapi"
1929 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
1930 mpeg2_vdpau_hwaccel_deps="vdpau"
1931 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
1932 mpeg4_crystalhd_decoder_select="crystalhd"
1933 mpeg4_vaapi_hwaccel_deps="vaapi"
1934 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
1935 mpeg4_vdpau_decoder_deps="vdpau"
1936 mpeg4_vdpau_decoder_select="mpeg4_decoder"
1937 mpeg4_vdpau_hwaccel_deps="vdpau"
1938 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
1939 msmpeg4_crystalhd_decoder_select="crystalhd"
1940 vc1_crystalhd_decoder_select="crystalhd"
1941 vc1_dxva2_hwaccel_deps="dxva2"
1942 vc1_dxva2_hwaccel_select="vc1_decoder"
1943 vc1_vaapi_hwaccel_deps="vaapi"
1944 vc1_vaapi_hwaccel_select="vc1_decoder"
1945 vc1_vdpau_decoder_deps="vdpau"
1946 vc1_vdpau_decoder_select="vc1_decoder"
1947 vc1_vdpau_hwaccel_deps="vdpau"
1948 vc1_vdpau_hwaccel_select="vc1_decoder"
1949 wmv3_crystalhd_decoder_select="crystalhd"
1950 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
1951 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
1952 wmv3_vdpau_decoder_select="vc1_vdpau_decoder"
1953 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
1954
1955 # parsers
1956 h264_parser_select="golomb h264chroma h264dsp h264pred h264qpel videodsp"
1957 mpeg4video_parser_select="error_resilience mpegvideo"
1958 mpegvideo_parser_select="error_resilience mpegvideo"
1959 vc1_parser_select="mpegvideo"
1960
1961 # external libraries
1962 libaacplus_encoder_deps="libaacplus"
1963 libcelt_decoder_deps="libcelt"
1964 libfaac_encoder_deps="libfaac"
1965 libfaac_encoder_select="audio_frame_queue"
1966 libfdk_aac_encoder_deps="libfdk_aac"
1967 libfdk_aac_encoder_select="audio_frame_queue"
1968 libgsm_decoder_deps="libgsm"
1969 libgsm_encoder_deps="libgsm"
1970 libgsm_ms_decoder_deps="libgsm"
1971 libgsm_ms_encoder_deps="libgsm"
1972 libilbc_decoder_deps="libilbc"
1973 libilbc_encoder_deps="libilbc"
1974 libmodplug_demuxer_deps="libmodplug"
1975 libmp3lame_encoder_deps="libmp3lame"
1976 libmp3lame_encoder_select="audio_frame_queue"
1977 libopencore_amrnb_decoder_deps="libopencore_amrnb"
1978 libopencore_amrnb_encoder_deps="libopencore_amrnb"
1979 libopencore_amrnb_encoder_select="audio_frame_queue"
1980 libopencore_amrwb_decoder_deps="libopencore_amrwb"
1981 libopenjpeg_decoder_deps="libopenjpeg"
1982 libopenjpeg_encoder_deps="libopenjpeg"
1983 libopus_decoder_deps="libopus"
1984 libopus_encoder_deps="libopus"
1985 libopus_encoder_select="audio_frame_queue"
1986 libquvi_demuxer_deps="libquvi"
1987 libschroedinger_decoder_deps="libschroedinger"
1988 libschroedinger_encoder_deps="libschroedinger"
1989 libshine_encoder_deps="libshine"
1990 libshine_encoder_select="audio_frame_queue"
1991 libspeex_decoder_deps="libspeex"
1992 libspeex_encoder_deps="libspeex"
1993 libspeex_encoder_select="audio_frame_queue"
1994 libstagefright_h264_decoder_deps="libstagefright_h264"
1995 libtheora_encoder_deps="libtheora"
1996 libtwolame_encoder_deps="libtwolame"
1997 libvo_aacenc_encoder_deps="libvo_aacenc"
1998 libvo_aacenc_encoder_select="audio_frame_queue"
1999 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2000 libvorbis_decoder_deps="libvorbis"
2001 libvorbis_encoder_deps="libvorbis"
2002 libvorbis_encoder_select="audio_frame_queue"
2003 libvpx_vp8_decoder_deps="libvpx"
2004 libvpx_vp8_encoder_deps="libvpx"
2005 libvpx_vp9_decoder_deps="libvpx"
2006 libvpx_vp9_encoder_deps="libvpx"
2007 libx264_encoder_deps="libx264"
2008 libx264rgb_encoder_deps="libx264"
2009 libxavs_encoder_deps="libxavs"
2010 libxvid_encoder_deps="libxvid"
2011 libutvideo_decoder_deps="libutvideo"
2012 libutvideo_encoder_deps="libutvideo"
2013
2014 # demuxers / muxers
2015 ac3_demuxer_select="ac3_parser"
2016 asf_stream_muxer_select="asf_muxer"
2017 avisynth_demuxer_deps="avisynth"
2018 dirac_demuxer_select="dirac_parser"
2019 dts_demuxer_select="dca_parser"
2020 dtshd_demuxer_select="dca_parser"
2021 eac3_demuxer_select="ac3_parser"
2022 f4v_muxer_select="mov_muxer"
2023 flac_demuxer_select="flac_parser"
2024 ipod_muxer_select="mov_muxer"
2025 ismv_muxer_select="mov_muxer"
2026 libnut_demuxer_deps="libnut"
2027 libnut_muxer_deps="libnut"
2028 matroska_audio_muxer_select="matroska_muxer"
2029 matroska_demuxer_suggest="bzlib lzo zlib"
2030 mov_demuxer_suggest="zlib"
2031 mov_muxer_select="rtpenc_chain"
2032 mp3_demuxer_select="mpegaudio_parser"
2033 mp4_muxer_select="mov_muxer"
2034 mpegts_muxer_select="adts_muxer latm_muxer"
2035 mpegtsraw_demuxer_select="mpegts_demuxer"
2036 mxf_d10_muxer_select="mxf_muxer"
2037 ogg_demuxer_select="golomb"
2038 psp_muxer_select="mov_muxer"
2039 rtp_demuxer_select="sdp_demuxer"
2040 rtpdec_select="asf_demuxer rm_demuxer rtp_protocol mpegts_demuxer mov_demuxer"
2041 rtsp_demuxer_select="http_protocol rtpdec"
2042 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2043 sap_demuxer_select="sdp_demuxer"
2044 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2045 sdp_demuxer_select="rtpdec"
2046 smoothstreaming_muxer_select="ismv_muxer"
2047 spdif_muxer_select="aac_parser"
2048 tak_demuxer_select="tak_parser"
2049 tg2_muxer_select="mov_muxer"
2050 tgp_muxer_select="mov_muxer"
2051 vobsub_demuxer_select="mpegps_demuxer"
2052 w64_demuxer_deps="wav_demuxer"
2053 w64_muxer_deps="wav_muxer"
2054
2055 # indevs / outdevs
2056 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2057 alsa_outdev_deps="alsa_asoundlib_h"
2058 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2059 caca_outdev_deps="libcaca"
2060 dshow_indev_deps="IBaseFilter"
2061 dshow_indev_extralibs="-lpsapi -lole32 -lstrmiids -luuid"
2062 dv1394_indev_deps="dv1394 dv_demuxer"
2063 fbdev_indev_deps="linux_fb_h"
2064 iec61883_indev_deps="libiec61883"
2065 jack_indev_deps="jack_jack_h sem_timedwait"
2066 lavfi_indev_deps="avfilter"
2067 libcdio_indev_deps="libcdio"
2068 libdc1394_indev_deps="libdc1394"
2069 libv4l2_indev_deps="libv4l2"
2070 openal_indev_deps="openal"
2071 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2072 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2073 pulse_indev_deps="libpulse"
2074 sdl_outdev_deps="sdl"
2075 sndio_indev_deps="sndio_h"
2076 sndio_outdev_deps="sndio_h"
2077 v4l_indev_deps="linux_videodev_h"
2078 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2079 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2080 vfwcap_indev_extralibs="-lavicap32"
2081 x11grab_indev_deps="x11grab"
2082
2083 # protocols
2084 bluray_protocol_deps="libbluray"
2085 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2086 ffrtmpcrypt_protocol_deps_any="gcrypt nettle openssl"
2087 ffrtmpcrypt_protocol_select="tcp_protocol"
2088 ffrtmphttp_protocol_deps="!librtmp_protocol"
2089 ffrtmphttp_protocol_select="http_protocol"
2090 gopher_protocol_select="network"
2091 httpproxy_protocol_select="tcp_protocol"
2092 http_protocol_select="tcp_protocol"
2093 https_protocol_select="tls_protocol"
2094 librtmp_protocol_deps="librtmp"
2095 librtmpe_protocol_deps="librtmp"
2096 librtmps_protocol_deps="librtmp"
2097 librtmpt_protocol_deps="librtmp"
2098 librtmpte_protocol_deps="librtmp"
2099 mmsh_protocol_select="http_protocol"
2100 mmst_protocol_select="network"
2101 rtmp_protocol_deps="!librtmp_protocol"
2102 rtmp_protocol_select="tcp_protocol"
2103 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2104 rtmps_protocol_deps="!librtmp_protocol"
2105 rtmps_protocol_select="tls_protocol"
2106 rtmpt_protocol_select="ffrtmphttp_protocol"
2107 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2108 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2109 rtp_protocol_select="udp_protocol"
2110 sctp_protocol_deps="struct_sctp_event_subscribe"
2111 sctp_protocol_select="network"
2112 srtp_protocol_select="rtp_protocol"
2113 tcp_protocol_select="network"
2114 tls_protocol_deps_any="openssl gnutls"
2115 tls_protocol_select="tcp_protocol"
2116 udp_protocol_select="network"
2117
2118 # filters
2119 aconvert_filter_deps="swresample"
2120 amovie_filter_deps="avcodec avformat"
2121 aresample_filter_deps="swresample"
2122 ass_filter_deps="libass"
2123 asyncts_filter_deps="avresample"
2124 atempo_filter_deps="avcodec rdft"
2125 blackframe_filter_deps="gpl"
2126 boxblur_filter_deps="gpl"
2127 colormatrix_filter_deps="gpl"
2128 cropdetect_filter_deps="gpl"
2129 delogo_filter_deps="gpl"
2130 deshake_filter_deps="avcodec"
2131 deshake_filter_select="dsputil"
2132 drawtext_filter_deps="libfreetype"
2133 ebur128_filter_deps="gpl"
2134 flite_filter_deps="libflite"
2135 frei0r_filter_deps="frei0r dlopen"
2136 frei0r_filter_extralibs='$ldl'
2137 frei0r_src_filter_deps="frei0r dlopen"
2138 frei0r_src_filter_extralibs='$ldl'
2139 geq_filter_deps="gpl"
2140 histeq_filter_deps="gpl"
2141 hqdn3d_filter_deps="gpl"
2142 hue_filter_deps="gpl"
2143 interlace_filter_deps="gpl"
2144 kerndeint_filter_deps="gpl"
2145 movie_filter_deps="avcodec avformat"
2146 mp_filter_deps="gpl avcodec swscale inline_asm"
2147 mpdecimate_filter_deps="gpl avcodec"
2148 mptestsrc_filter_deps="gpl"
2149 negate_filter_deps="lut_filter"
2150 noise_filter_deps="gpl"
2151 resample_filter_deps="avresample"
2152 ocv_filter_deps="libopencv"
2153 pan_filter_deps="swresample"
2154 pp_filter_deps="gpl postproc"
2155 removelogo_filter_deps="avcodec avformat swscale"
2156 scale_filter_deps="swscale"
2157 smartblur_filter_deps="gpl swscale"
2158 showspectrum_filter_deps="avcodec rdft"
2159 stereo3d_filter_deps="gpl"
2160 subtitles_filter_deps="avformat avcodec libass"
2161 super2xsai_filter_deps="gpl"
2162 tinterlace_filter_deps="gpl"
2163 vidstabdetect_filter_deps="libvidstab"
2164 vidstabtransform_filter_deps="libvidstab"
2165 yadif_filter_deps="gpl"
2166 pixfmts_super2xsai_test_deps="super2xsai_filter"
2167 tinterlace_merge_test_deps="tinterlace_filter"
2168 tinterlace_pad_test_deps="tinterlace_filter"
2169
2170 # libraries
2171 avcodec_deps="avutil"
2172 avdevice_deps="avutil avcodec avformat"
2173 avfilter_deps="avutil"
2174 avformat_deps="avutil avcodec"
2175 avresample_deps="avutil"
2176 postproc_deps="avutil gpl"
2177 swscale_deps="avutil"
2178
2179 # programs
2180 ffmpeg_deps="avcodec avfilter avformat swscale swresample"
2181 ffmpeg_select="format_filter aformat_filter
2182                setpts_filter null_filter anull_filter"
2183 ffplay_deps="avcodec avformat swscale swresample sdl"
2184 ffplay_select="rdft crop_filter"
2185 ffprobe_deps="avcodec avformat"
2186 ffserver_deps="avformat ffm_muxer fork rtp_protocol rtsp_demuxer"
2187 ffserver_extralibs='$ldl'
2188
2189 # documentation
2190 podpages_deps="perl"
2191 manpages_deps="perl pod2man"
2192 htmlpages_deps="texi2html"
2193 txtpages_deps="makeinfo"
2194 doc_deps_any="manpages htmlpages podpages txtpages"
2195
2196 # default parameters
2197
2198 logfile="config.log"
2199
2200 # installation paths
2201 prefix_default="/usr/local"
2202 bindir_default='${prefix}/bin'
2203 datadir_default='${prefix}/share/ffmpeg'
2204 incdir_default='${prefix}/include'
2205 libdir_default='${prefix}/lib'
2206 mandir_default='${prefix}/share/man'
2207 shlibdir_default="$libdir_default"
2208
2209 # toolchain
2210 ar_default="ar"
2211 cc_default="gcc"
2212 cxx_default="g++"
2213 host_cc_default="gcc"
2214 cp_f="cp -f"
2215 install="install"
2216 ln_s="ln -s -f"
2217 nm_default="nm -g"
2218 objformat="elf"
2219 pkg_config_default=pkg-config
2220 ranlib="ranlib"
2221 strip_default="strip"
2222 yasmexe_default="yasm"
2223
2224 nogas=":"
2225
2226 # machine
2227 arch_default=$(uname -m)
2228 cpu="generic"
2229
2230 # OS
2231 target_os_default=$(tolower $(uname -s))
2232 host_os=$target_os_default
2233
2234 # configurable options
2235 enable $PROGRAM_LIST
2236 enable $DOCUMENT_LIST
2237 enable $(filter_out avresample $LIBRARY_LIST)
2238 enable stripping
2239
2240 enable asm
2241 enable debug
2242 enable doc
2243 enable optimizations
2244 enable runtime_cpudetect
2245 enable safe_bitstream_reader
2246 enable static
2247 enable swscale_alpha
2248
2249 # By default, enable only those hwaccels that have no external dependencies.
2250 enable dxva2 vdpau
2251
2252 # build settings
2253 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2254 FFSERVERLDFLAGS=-Wl,-E
2255 LIBPREF="lib"
2256 LIBSUF=".a"
2257 FULLNAME='$(NAME)$(BUILDSUF)'
2258 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2259 SLIBPREF="lib"
2260 SLIBSUF=".so"
2261 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2262 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2263 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2264 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2265 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2266 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2267
2268 asflags_filter=echo
2269 cflags_filter=echo
2270 ldflags_filter=echo
2271
2272 AS_C='-c'
2273 AS_O='-o $@'
2274 CC_C='-c'
2275 CC_E='-E -o $@'
2276 CC_O='-o $@'
2277 CXX_C='-c'
2278 CXX_O='-o $@'
2279 LD_O='-o $@'
2280 LD_LIB='-l%'
2281 LD_PATH='-L'
2282 HOSTCC_C='-c'
2283 HOSTCC_O='-o $@'
2284 HOSTLD_O='-o $@'
2285
2286 host_cflags='-O3 -g'
2287 host_cppflags='-D_ISOC99_SOURCE -D_XOPEN_SOURCE=600'
2288 host_libs='-lm'
2289 host_cflags_filter=echo
2290 host_ldflags_filter=echo
2291
2292 target_path='$(CURDIR)'
2293
2294 # since the object filename is not given with the -MM flag, the compiler
2295 # is only able to print the basename, and we must add the path ourselves
2296 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2297 DEPFLAGS='-MM'
2298
2299 # find source path
2300 if test -f configure; then
2301     source_path=.
2302 else
2303     source_path=$(cd $(dirname "$0"); pwd)
2304     echo "$source_path" | grep -q '[[:blank:]]' &&
2305         die "Out of tree builds are impossible with whitespace in source path."
2306     test -e "$source_path/config.h" &&
2307         die "Out of tree builds are impossible with config.h in source dir."
2308 fi
2309
2310 for v in "$@"; do
2311     r=${v#*=}
2312     l=${v%"$r"}
2313     r=$(sh_quote "$r")
2314     FFMPEG_CONFIGURATION="${FFMPEG_CONFIGURATION# } ${l}${r}"
2315 done
2316
2317 find_things(){
2318     thing=$1
2319     pattern=$2
2320     file=$source_path/$3
2321     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2322 }
2323
2324 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2325 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2326 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2327 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2328 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2329 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2330 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2331 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2332 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2333 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2334 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2335
2336 ALL_COMPONENTS="
2337     $BSF_LIST
2338     $DECODER_LIST
2339     $DEMUXER_LIST
2340     $ENCODER_LIST
2341     $FILTER_LIST
2342     $HWACCEL_LIST
2343     $INDEV_LIST
2344     $MUXER_LIST
2345     $OUTDEV_LIST
2346     $PARSER_LIST
2347     $PROTOCOL_LIST
2348 "
2349
2350 for n in $COMPONENT_LIST; do
2351     v=$(toupper ${n%s})_LIST
2352     eval enable \$$v
2353     eval ${n}_if_any="\$$v"
2354 done
2355
2356 enable $ARCH_EXT_LIST
2357
2358 die_unknown(){
2359     echo "Unknown option \"$1\"."
2360     echo "See $0 --help for available options."
2361     exit 1
2362 }
2363
2364 print_3_columns() {
2365     cat | tr ' ' '\n' | sort | pr -r -3 -t
2366 }
2367
2368 show_list() {
2369     suffix=_$1
2370     shift
2371     echo $* | sed s/$suffix//g | print_3_columns
2372     exit 0
2373 }
2374
2375 rand_list(){
2376     IFS=', '
2377     set -- $*
2378     unset IFS
2379     for thing; do
2380         comp=${thing%:*}
2381         prob=${thing#$comp}
2382         prob=${prob#:}
2383         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2384         echo "prob ${prob:-0.5}"
2385         printf '%s\n' $comp
2386     done
2387 }
2388
2389 do_random(){
2390     action=$1
2391     shift
2392     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2393     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2394 }
2395
2396 for opt do
2397     optval="${opt#*=}"
2398     case "$opt" in
2399         --extra-ldflags=*)
2400             add_ldflags $optval
2401         ;;
2402         --extra-libs=*)
2403             add_extralibs $optval
2404         ;;
2405         --disable-devices)
2406             disable $INDEV_LIST $OUTDEV_LIST
2407         ;;
2408         --enable-debug=*)
2409             debuglevel="$optval"
2410         ;;
2411         --disable-programs)
2412             disable $PROGRAM_LIST
2413         ;;
2414         --disable-everything)
2415             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2416         ;;
2417         --disable-all)
2418             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2419             disable $LIBRARY_LIST $PROGRAM_LIST doc
2420         ;;
2421         --enable-random|--disable-random)
2422             action=${opt%%-random}
2423             do_random ${action#--} $COMPONENT_LIST
2424         ;;
2425         --enable-random=*|--disable-random=*)
2426             action=${opt%%-random=*}
2427             do_random ${action#--} $optval
2428         ;;
2429         --enable-*=*|--disable-*=*)
2430             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2431             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2432             eval list=\$$(toupper $thing)_LIST
2433             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2434             list=$(filter "$name" $list)
2435             [ "$list" = "" ] && warn "Option $opt did not match anything"
2436             $action $list
2437         ;;
2438         --enable-?*|--disable-?*)
2439             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2440             if is_in $option $COMPONENT_LIST; then
2441                 test $action = disable && action=unset
2442                 eval $action \$$(toupper ${option%s})_LIST
2443             elif is_in $option $CMDLINE_SELECT; then
2444                 $action $option
2445             else
2446                 die_unknown $opt
2447             fi
2448         ;;
2449         --list-*)
2450             NAME="${opt#--list-}"
2451             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2452             NAME=${NAME%s}
2453             eval show_list $NAME \$$(toupper $NAME)_LIST
2454         ;;
2455         --help|-h) show_help
2456         ;;
2457         --fatal-warnings) enable fatal_warnings
2458         ;;
2459         *)
2460             optname="${opt%%=*}"
2461             optname="${optname#--}"
2462             optname=$(echo "$optname" | sed 's/-/_/g')
2463             if is_in $optname $CMDLINE_SET; then
2464                 eval $optname='$optval'
2465             elif is_in $optname $CMDLINE_APPEND; then
2466                 append $optname "$optval"
2467             else
2468                 die_unknown $opt
2469             fi
2470         ;;
2471     esac
2472 done
2473
2474 disabled logging && logfile=/dev/null
2475
2476 echo "# $0 $FFMPEG_CONFIGURATION" > $logfile
2477 set >> $logfile
2478
2479 test -n "$cross_prefix" && enable cross_compile
2480
2481 if enabled cross_compile; then
2482     test -n "$arch" && test -n "$target_os" ||
2483         die "Must specify target arch and OS when cross-compiling"
2484 fi
2485
2486 ar_default="${cross_prefix}${ar_default}"
2487 cc_default="${cross_prefix}${cc_default}"
2488 cxx_default="${cross_prefix}${cxx_default}"
2489 nm_default="${cross_prefix}${nm_default}"
2490 pkg_config_default="${cross_prefix}${pkg_config_default}"
2491 ranlib="${cross_prefix}${ranlib}"
2492 strip_default="${cross_prefix}${strip_default}"
2493
2494 sysinclude_default="${sysroot}/usr/include"
2495
2496 case "$toolchain" in
2497     clang-asan)
2498         cc_default="clang"
2499         add_cflags  -fsanitize=address
2500         add_ldflags -fsanitize=address
2501     ;;
2502     clang-tsan)
2503         cc_default="clang"
2504         add_cflags  -fsanitize=thread -pie
2505         add_ldflags -fsanitize=thread -pie
2506     ;;
2507     msvc)
2508         cc_default="c99wrap cl"
2509         ld_default="c99wrap link"
2510         nm_default="dumpbin -symbols"
2511         ar_default="lib"
2512         target_os_default="win32"
2513     ;;
2514     gcov)
2515         add_cflags  -fprofile-arcs -ftest-coverage
2516         add_ldflags -fprofile-arcs -ftest-coverage
2517     ;;
2518     ?*)
2519         die "Unknown toolchain $toolchain"
2520     ;;
2521 esac
2522
2523 set_default arch cc cxx pkg_config strip sysinclude target_os yasmexe
2524 enabled cross_compile || host_cc_default=$cc
2525 set_default host_cc
2526
2527 if ! $pkg_config --version >/dev/null 2>&1; then
2528     warn "$pkg_config not found, library detection may fail."
2529     pkg_config=false
2530 fi
2531
2532 exesuf() {
2533     case $1 in
2534         mingw32*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2535     esac
2536 }
2537
2538 EXESUF=$(exesuf $target_os)
2539 HOSTEXESUF=$(exesuf $host_os)
2540
2541 # set temporary file name
2542 : ${TMPDIR:=$TEMPDIR}
2543 : ${TMPDIR:=$TMP}
2544 : ${TMPDIR:=/tmp}
2545
2546 if ! check_cmd mktemp -u XXXXXX; then
2547     # simple replacement for missing mktemp
2548     # NOT SAFE FOR GENERAL USE
2549     mktemp(){
2550         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2551     }
2552 fi
2553
2554 tmpfile(){
2555     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2556         (set -C; exec > $tmp) 2>/dev/null ||
2557         die "Unable to create temporary file in $TMPDIR."
2558     append TMPFILES $tmp
2559     eval $1=$tmp
2560 }
2561
2562 trap 'rm -f -- $TMPFILES' EXIT
2563
2564 tmpfile TMPASM .asm
2565 tmpfile TMPC   .c
2566 tmpfile TMPCPP .cpp
2567 tmpfile TMPE   $EXESUF
2568 tmpfile TMPH   .h
2569 tmpfile TMPO   .o
2570 tmpfile TMPS   .S
2571 tmpfile TMPSH  .sh
2572 tmpfile TMPV   .ver
2573
2574 unset -f mktemp
2575
2576 chmod +x $TMPE
2577
2578 # make sure we can execute files in $TMPDIR
2579 cat > $TMPSH 2>> $logfile <<EOF
2580 #! /bin/sh
2581 EOF
2582 chmod +x $TMPSH >> $logfile 2>&1
2583 if ! $TMPSH >> $logfile 2>&1; then
2584     cat <<EOF
2585 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2586 variable to another directory and make sure that it is not mounted noexec.
2587 EOF
2588     die "Sanity test failed."
2589 fi
2590
2591 ccc_flags(){
2592     for flag; do
2593         case $flag in
2594             -std=c99)           echo -c99                       ;;
2595             -mcpu=*)            echo -arch ${flag#*=}           ;;
2596             -mieee)             echo -ieee                      ;;
2597             -O*|-fast)          echo $flag                      ;;
2598             -fno-math-errno)    echo -assume nomath_errno       ;;
2599             -g)                 echo -g3                        ;;
2600             -Wall)              echo -msg_enable level2         ;;
2601             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2602             -Wl,*)              echo $flag                      ;;
2603             -f*|-W*)                                            ;;
2604             *)                  echo $flag                      ;;
2605         esac
2606    done
2607 }
2608
2609 msvc_flags(){
2610     for flag; do
2611         case $flag in
2612             -fomit-frame-pointer) echo -Oy ;;
2613             -g)                   echo -Z7 ;;
2614             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389 \
2615                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
2616                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
2617                                        -wd4554 \
2618                                        -wd4996 -wd4273 ;;
2619             -std=c99)             ;;
2620             -fno-math-errno)      ;;
2621             -fno-common)          ;;
2622             -fno-signed-zeros)    ;;
2623             -fPIC)                ;;
2624             -lz)                  echo zlib.lib ;;
2625             -lavifil32)           echo vfw32.lib ;;
2626             -lavicap32)           echo vfw32.lib user32.lib ;;
2627             -l*)                  echo ${flag#-l}.lib ;;
2628             *)                    echo $flag ;;
2629         esac
2630     done
2631 }
2632
2633 pgi_flags(){
2634     for flag; do
2635         case $flag in
2636             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
2637             -fomit-frame-pointer) echo -Mnoframe ;;
2638             -g)                   echo -gopt ;;
2639             *)                    echo $flag ;;
2640         esac
2641     done
2642 }
2643
2644 suncc_flags(){
2645     for flag; do
2646         case $flag in
2647             -march=*|-mcpu=*)
2648                 case "${flag#*=}" in
2649                     native)                   echo -xtarget=native       ;;
2650                     v9|niagara)               echo -xarch=sparc          ;;
2651                     ultrasparc)               echo -xarch=sparcvis       ;;
2652                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
2653                     i586|pentium)             echo -xchip=pentium        ;;
2654                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
2655                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
2656                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
2657                     pentium4*)          echo -xtarget=pentium4           ;;
2658                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
2659                     *-sse3)             echo -xarch=sse3                 ;;
2660                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
2661                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
2662                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
2663                     amdfam10|barcelona)       echo -xtarget=barcelona    ;;
2664                     bdver*)                   echo -xarch=avx            ;;
2665                     athlon-4|athlon-[mx]p)    echo -xarch=ssea           ;;
2666                     k8|opteron|athlon64|athlon-fx)
2667                                               echo -xarch=sse2a          ;;
2668                     athlon*)                  echo -xarch=pentium_proa   ;;
2669                 esac
2670                 ;;
2671             -std=c99)             echo -xc99              ;;
2672             -fomit-frame-pointer) echo -xregs=frameptr    ;;
2673             -fPIC)                echo -KPIC -xcode=pic32 ;;
2674             -W*,*)                echo $flag              ;;
2675             -f*-*|-W*|-mimpure-text)                      ;;
2676             -shared)              echo -G                 ;;
2677             *)                    echo $flag              ;;
2678         esac
2679     done
2680 }
2681
2682 tms470_flags(){
2683     for flag; do
2684         case $flag in
2685             -march=*|-mcpu=*)
2686                 case "${flag#*=}" in
2687                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
2688                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
2689                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
2690                     armv6*|arm11*)          echo -mv=6   ;;
2691                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
2692                                             echo -mv=5e  ;;
2693                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
2694                 esac
2695                 ;;
2696             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
2697             -mfpu=vfp)      echo --float_support=vfpv2        ;;
2698             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
2699             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
2700             -msoft-float)   echo --float_support=vfplib       ;;
2701             -O[0-3]|-mf=*)  echo $flag                        ;;
2702             -g)             echo -g -mn                       ;;
2703             -pds=*)         echo $flag                        ;;
2704             -D*|-I*)        echo $flag                        ;;
2705             --gcc|--abi=*)  echo $flag                        ;;
2706             -me)            echo $flag                        ;;
2707         esac
2708     done
2709 }
2710
2711 probe_cc(){
2712     pfx=$1
2713     _cc=$2
2714
2715     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
2716     unset _ld_o _ldflags _ld_lib _ld_path
2717     unset _depflags _DEPCMD _DEPFLAGS
2718     _flags_filter=echo
2719
2720     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
2721         _type=llvm_gcc
2722         gcc_extra_ver=$(expr "$($_cc --version | head -n1)" : '.*\((.*)\)')
2723         _ident="llvm-gcc $($_cc -dumpversion) $gcc_extra_ver"
2724         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2725         _cflags_speed='-O3'
2726         _cflags_size='-Os'
2727     elif $_cc -v 2>&1 | grep -qi ^gcc; then
2728         _type=gcc
2729         gcc_version=$($_cc --version | head -n1)
2730         gcc_basever=$($_cc -dumpversion)
2731         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
2732         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
2733         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
2734         if ! $_cc -dumpversion | grep -q '^2\.'; then
2735             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2736         fi
2737         _cflags_speed='-O3'
2738         _cflags_size='-Os'
2739     elif $_cc --version 2>/dev/null | grep -q ^icc; then
2740         _type=icc
2741         _ident=$($_cc --version | head -n1)
2742         _depflags='-MMD'
2743         _cflags_speed='-O3'
2744         _cflags_size='-Os'
2745         _cflags_noopt='-O1'
2746     elif $_cc -v 2>&1 | grep -q xlc; then
2747         _type=xlc
2748         _ident=$($_cc -qversion 2>/dev/null | head -n1)
2749         _cflags_speed='-O5'
2750         _cflags_size='-O5 -qcompact'
2751     elif $_cc -V 2>/dev/null | grep -q Compaq; then
2752         _type=ccc
2753         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
2754         _DEPFLAGS='-M'
2755         _cflags_speed='-fast'
2756         _cflags_size='-O1'
2757         _flags_filter=ccc_flags
2758     elif $_cc --vsn 2>/dev/null | grep -q "ARM C/C++ Compiler"; then
2759         test -d "$sysroot" || die "No valid sysroot specified."
2760         _type=armcc
2761         _ident=$($_cc --vsn | head -n1)
2762         armcc_conf="$PWD/armcc.conf"
2763         $_cc --arm_linux_configure                 \
2764              --arm_linux_config_file="$armcc_conf" \
2765              --configure_sysroot="$sysroot"        \
2766              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
2767              die "Error creating armcc configuration file."
2768         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
2769         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
2770         as_default="${cross_prefix}gcc"
2771         _depflags='-MMD'
2772         _cflags_speed='-O3'
2773         _cflags_size='-Os'
2774     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
2775         _type=tms470
2776         _ident=$($_cc -version | head -n1 | tr -s ' ')
2777         _flags='--gcc --abi=eabi -me'
2778         _cc_e='-ppl -fe=$@'
2779         _cc_o='-fe=$@'
2780         _depflags='-ppa -ppd=$(@:.o=.d)'
2781         _cflags_speed='-O3 -mf=5'
2782         _cflags_size='-O3 -mf=2'
2783         _flags_filter=tms470_flags
2784     elif $_cc -v 2>&1 | grep -q clang; then
2785         _type=clang
2786         _ident=$($_cc --version | head -n1)
2787         _depflags='-MMD'
2788         _cflags_speed='-O3'
2789         _cflags_size='-Os'
2790     elif $_cc -V 2>&1 | grep -q Sun; then
2791         _type=suncc
2792         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
2793         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
2794         _DEPFLAGS='-xM1 -xc99'
2795         _ldflags='-std=c99'
2796         _cflags_speed='-O5'
2797         _cflags_size='-O5 -xspace'
2798         _flags_filter=suncc_flags
2799     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
2800         _type=pathscale
2801         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
2802         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2803         _cflags_speed='-O2'
2804         _cflags_size='-Os'
2805         _flags_filter='filter_out -Wdisabled-optimization'
2806     elif $_cc -v 2>&1 | grep -q Open64; then
2807         _type=open64
2808         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
2809         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2810         _cflags_speed='-O2'
2811         _cflags_size='-Os'
2812         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
2813     elif $_cc -V 2>&1 | grep -q Portland; then
2814         _type=pgi
2815         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
2816         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
2817         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
2818         _cflags_size="-O2 -Munroll=c:1 $opt_common"
2819         _cflags_noopt="-O"
2820         _flags_filter=pgi_flags
2821     elif $_cc 2>&1 | grep -q Microsoft; then
2822         _type=msvc
2823         _ident=$($cc 2>&1 | head -n1)
2824         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
2825         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
2826         _cflags_speed="-O2"
2827         _cflags_size="-O1"
2828         # Nonstandard output options, to avoid msys path conversion issues, relies on wrapper to remap it
2829         if $_cc 2>&1 | grep -q Linker; then
2830             _ld_o='-out $@'
2831         else
2832             _ld_o='-Fe$@'
2833         fi
2834         _cc_o='-Fo $@'
2835         _cc_e='-P -Fi $@'
2836         _flags_filter=msvc_flags
2837         _ld_lib='lib%.a'
2838         _ld_path='-libpath:'
2839         _flags='-nologo'
2840         _cflags='-D_USE_MATH_DEFINES -Dinline=__inline -FIstdlib.h -Dstrtoll=_strtoi64'
2841         if [ $pfx = hostcc ]; then
2842             append _cflags -Dsnprintf=_snprintf
2843         fi
2844         disable stripping
2845     fi
2846
2847     eval ${pfx}_type=\$_type
2848     eval ${pfx}_ident=\$_ident
2849 }
2850
2851 set_ccvars(){
2852     eval ${1}_C=\${_cc_c-\${${1}_C}}
2853     eval ${1}_E=\${_cc_e-\${${1}_E}}
2854     eval ${1}_O=\${_cc_o-\${${1}_O}}
2855
2856     if [ -n "$_depflags" ]; then
2857         eval ${1}_DEPFLAGS=\$_depflags
2858     else
2859         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
2860         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
2861         eval DEP${1}FLAGS=\$_flags
2862     fi
2863 }
2864
2865 probe_cc cc "$cc"
2866 cflags_filter=$_flags_filter
2867 cflags_speed=$_cflags_speed
2868 cflags_size=$_cflags_size
2869 cflags_noopt=$_cflags_noopt
2870 add_cflags $_flags $_cflags
2871 cc_ldflags=$_ldflags
2872 set_ccvars CC
2873
2874 probe_cc hostcc "$host_cc"
2875 host_cflags_filter=$_flags_filter
2876 add_host_cflags  $_flags $_cflags
2877 set_ccvars HOSTCC
2878
2879 test -n "$cc_type" && enable $cc_type ||
2880     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
2881
2882 : ${as_default:=$cc}
2883 : ${dep_cc_default:=$cc}
2884 : ${ld_default:=$cc}
2885 : ${host_ld_default:=$host_cc}
2886 set_default ar as dep_cc ld host_ld
2887
2888 probe_cc as "$as"
2889 asflags_filter=$_flags_filter
2890 add_asflags $_flags $_cflags
2891 set_ccvars AS
2892
2893 probe_cc ld "$ld"
2894 ldflags_filter=$_flags_filter
2895 add_ldflags $_flags $_ldflags
2896 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
2897 LD_O=${_ld_o-$LD_O}
2898 LD_LIB=${_ld_lib-$LD_LIB}
2899 LD_PATH=${_ld_path-$LD_PATH}
2900
2901 probe_cc hostld "$host_ld"
2902 host_ldflags_filter=$_flags_filter
2903 add_host_ldflags $_flags $_ldflags
2904 HOSTLD_O=${_ld_o-$HOSTLD_O}
2905
2906 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
2907     probe_cc depcc "$dep_cc"
2908     CCDEP=${_DEPCMD:-$DEPCMD}
2909     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
2910     DEPCCFLAGS=$_flags
2911 fi
2912
2913 if $ar 2>&1 | grep -q Microsoft; then
2914     arflags="-nologo"
2915     ar_o='-out:$@'
2916 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
2917     arflags="rq"
2918     ar_o='$@'
2919 else
2920     arflags="rc"
2921     ar_o='$@'
2922 fi
2923
2924 add_cflags $extra_cflags
2925 add_cxxflags $extra_cxxflags
2926 add_asflags $extra_cflags
2927
2928 if test -n "$sysroot"; then
2929     case "$cc_type" in
2930         gcc|llvm_gcc|clang)
2931             add_cppflags --sysroot="$sysroot"
2932             add_ldflags --sysroot="$sysroot"
2933         ;;
2934         tms470)
2935             add_cppflags -I"$sysinclude"
2936             add_ldflags  --sysroot="$sysroot"
2937         ;;
2938     esac
2939 fi
2940
2941 if test "$cpu" = host; then
2942     enabled cross_compile && die "--cpu=host makes no sense when cross-compiling."
2943
2944     case "$cc_type" in
2945         gcc|llvm_gcc)
2946             check_native(){
2947                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
2948                 sed -n "/cc1.*$1=/{
2949                             s/.*$1=\\([^ ]*\\).*/\\1/
2950                             p
2951                             q
2952                         }" $TMPE
2953             }
2954             cpu=$(check_native -march || check_native -mcpu)
2955         ;;
2956     esac
2957
2958     test "${cpu:-host}" = host && die "--cpu=host not supported with compiler $cc"
2959 fi
2960
2961 # Deal with common $arch aliases
2962 case "$arch" in
2963     aarch64|arm64)
2964         arch="aarch64"
2965     ;;
2966     arm*|iPad*)
2967         arch="arm"
2968     ;;
2969     mips*|IP*)
2970         arch="mips"
2971     ;;
2972     parisc*|hppa*)
2973         arch="parisc"
2974     ;;
2975     "Power Macintosh"|ppc*|powerpc*)
2976         arch="ppc"
2977     ;;
2978     s390|s390x)
2979         arch="s390"
2980     ;;
2981     sh4|sh)
2982         arch="sh4"
2983     ;;
2984     sun4u|sparc*)
2985         arch="sparc"
2986     ;;
2987     tilegx|tile-gx)
2988         arch="tilegx"
2989     ;;
2990     i[3-6]86|i86pc|BePC|x86pc|x86_64|x86_32|amd64)
2991         arch="x86"
2992     ;;
2993 esac
2994
2995 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
2996 enable $arch
2997
2998 # Add processor-specific flags
2999 if enabled aarch64; then
3000
3001     case $cpu in
3002         armv*)
3003             cpuflags="-march=$cpu"
3004         ;;
3005         *)
3006             cpuflags="-mcpu=$cpu"
3007         ;;
3008     esac
3009
3010 elif enabled alpha; then
3011
3012     cpuflags="-mcpu=$cpu"
3013
3014 elif enabled arm; then
3015
3016     check_arm_arch() {
3017         check_cpp_condition stddef.h \
3018             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3019             $cpuflags
3020     }
3021
3022     probe_arm_arch() {
3023         if   check_arm_arch 4;        then echo armv4;
3024         elif check_arm_arch 4T;       then echo armv4t;
3025         elif check_arm_arch 5;        then echo armv5;
3026         elif check_arm_arch 5E;       then echo armv5e;
3027         elif check_arm_arch 5T;       then echo armv5t;
3028         elif check_arm_arch 5TE;      then echo armv5te;
3029         elif check_arm_arch 5TEJ;     then echo armv5te;
3030         elif check_arm_arch 6;        then echo armv6;
3031         elif check_arm_arch 6J;       then echo armv6j;
3032         elif check_arm_arch 6K;       then echo armv6k;
3033         elif check_arm_arch 6Z;       then echo armv6z;
3034         elif check_arm_arch 6ZK;      then echo armv6zk;
3035         elif check_arm_arch 6T2;      then echo armv6t2;
3036         elif check_arm_arch 7;        then echo armv7;
3037         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3038         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3039         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3040         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3041         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3042         fi
3043     }
3044
3045     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3046
3047     case $cpu in
3048         armv*)
3049             cpuflags="-march=$cpu"
3050             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3051         ;;
3052         *)
3053             cpuflags="-mcpu=$cpu"
3054             case $cpu in
3055                 cortex-a*)                               subarch=armv7a  ;;
3056                 cortex-r*)                               subarch=armv7r  ;;
3057                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3058                 arm11*)                                  subarch=armv6   ;;
3059                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3060                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3061                 *)                             subarch=$(probe_arm_arch) ;;
3062             esac
3063         ;;
3064     esac
3065
3066     case "$subarch" in
3067         armv5t*)    enable fast_clz                ;;
3068         armv[6-8]*) enable fast_clz fast_unaligned ;;
3069     esac
3070
3071 elif enabled avr32; then
3072
3073     case $cpu in
3074         ap7[02]0[0-2])
3075             subarch="avr32_ap"
3076             cpuflags="-mpart=$cpu"
3077         ;;
3078         ap)
3079             subarch="avr32_ap"
3080             cpuflags="-march=$cpu"
3081         ;;
3082         uc3[ab]*)
3083             subarch="avr32_uc"
3084             cpuflags="-mcpu=$cpu"
3085         ;;
3086         uc)
3087             subarch="avr32_uc"
3088             cpuflags="-march=$cpu"
3089         ;;
3090     esac
3091
3092 elif enabled bfin; then
3093
3094     cpuflags="-mcpu=$cpu"
3095
3096 elif enabled mips; then
3097
3098     cpuflags="-march=$cpu"
3099
3100     case $cpu in
3101         24kc)
3102             disable mipsfpu
3103             disable mipsdspr1
3104             disable mipsdspr2
3105         ;;
3106         24kf*)
3107             disable mipsdspr1
3108             disable mipsdspr2
3109         ;;
3110         24kec|34kc|1004kc)
3111             disable mipsfpu
3112             disable mipsdspr2
3113         ;;
3114         24kef*|34kf*|1004kf*)
3115             disable mipsdspr2
3116         ;;
3117         74kc)
3118             disable mipsfpu
3119         ;;
3120     esac
3121
3122 elif enabled ppc; then
3123
3124     case $(tolower $cpu) in
3125         601|ppc601|powerpc601)
3126             cpuflags="-mcpu=601"
3127             disable altivec
3128         ;;
3129         603*|ppc603*|powerpc603*)
3130             cpuflags="-mcpu=603"
3131             disable altivec
3132         ;;
3133         604*|ppc604*|powerpc604*)
3134             cpuflags="-mcpu=604"
3135             disable altivec
3136         ;;
3137         g3|75*|ppc75*|powerpc75*)
3138             cpuflags="-mcpu=750"
3139             disable altivec
3140         ;;
3141         g4|745*|ppc745*|powerpc745*)
3142             cpuflags="-mcpu=7450"
3143         ;;
3144         74*|ppc74*|powerpc74*)
3145             cpuflags="-mcpu=7400"
3146         ;;
3147         g5|970|ppc970|powerpc970)
3148             cpuflags="-mcpu=970"
3149         ;;
3150         power[3-7]*)
3151             cpuflags="-mcpu=$cpu"
3152         ;;
3153         cell)
3154             cpuflags="-mcpu=cell"
3155             enable ldbrx
3156         ;;
3157         e500mc)
3158             cpuflags="-mcpu=e500mc"
3159             disable altivec
3160         ;;
3161         e500v2)
3162             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3163             disable altivec
3164         ;;
3165         e500)
3166             cpuflags="-mcpu=8540 -mhard-float"
3167             disable altivec
3168         ;;
3169     esac
3170
3171 elif enabled sparc; then
3172
3173     case $cpu in
3174         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3175             cpuflags="-mcpu=$cpu"
3176             disable vis
3177         ;;
3178         ultrasparc*|niagara[234])
3179             cpuflags="-mcpu=$cpu"
3180         ;;
3181     esac
3182
3183 elif enabled x86; then
3184
3185     case $cpu in
3186         i[345]86|pentium)
3187             cpuflags="-march=$cpu"
3188             disable mmx
3189         ;;
3190         # targets that do NOT support conditional mov (cmov)
3191         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3192             cpuflags="-march=$cpu"
3193             disable cmov
3194         ;;
3195         # targets that do support conditional mov (cmov)
3196         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3197             cpuflags="-march=$cpu"
3198             enable cmov
3199             enable fast_cmov
3200         ;;
3201         # targets that do support conditional mov but on which it's slow
3202         pentium4|pentium4m|prescott|nocona)
3203             cpuflags="-march=$cpu"
3204             enable cmov
3205             disable fast_cmov
3206         ;;
3207     esac
3208
3209 fi
3210
3211 if [ "$cpu" != generic ]; then
3212     add_cflags  $cpuflags
3213     add_asflags $cpuflags
3214 fi
3215
3216 # compiler sanity check
3217 check_exec <<EOF
3218 int main(void){ return 0; }
3219 EOF
3220 if test "$?" != 0; then
3221     echo "$cc is unable to create an executable file."
3222     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3223         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3224         echo "Only do this if you know what cross compiling means."
3225     fi
3226     die "C compiler test failed."
3227 fi
3228
3229 add_cppflags -D_ISOC99_SOURCE
3230 add_cxxflags -D__STDC_CONSTANT_MACROS
3231 check_cflags -std=c99
3232 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3233 #include <stdlib.h>
3234 EOF
3235 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3236 #include <stdlib.h>
3237 EOF
3238
3239 check_host_cflags -std=c99
3240 check_host_cflags -Wall
3241
3242 check_64bit(){
3243     arch32=$1
3244     arch64=$2
3245     expr=$3
3246     check_code cc "" "int test[2*($expr) - 1]" &&
3247         subarch=$arch64 || subarch=$arch32
3248 }
3249
3250 case "$arch" in
3251     aarch64|alpha|ia64)
3252         spic=$shared
3253     ;;
3254     mips)
3255         check_64bit mips mips64 '_MIPS_SIM > 1'
3256         spic=$shared
3257     ;;
3258     parisc)
3259         check_64bit parisc parisc64 'sizeof(void *) > 4'
3260         spic=$shared
3261     ;;
3262     ppc)
3263         check_64bit ppc ppc64 'sizeof(void *) > 4'
3264         spic=$shared
3265     ;;
3266     sparc)
3267         check_64bit sparc sparc64 'sizeof(void *) > 4'
3268         spic=$shared
3269     ;;
3270     x86)
3271         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3272         if test "$subarch" = "x86_64"; then
3273             spic=$shared
3274         fi
3275     ;;
3276     ppc)
3277         check_cc <<EOF && subarch="ppc64"
3278         int test[(int)sizeof(char*) - 7];
3279 EOF
3280     ;;
3281 esac
3282
3283 enable $subarch
3284 enabled spic && enable pic
3285
3286 # OS specific
3287 case $target_os in
3288     haiku)
3289         prefix_default="/boot/common"
3290         network_extralibs="-lnetwork"
3291         host_libs=
3292         ;;
3293     sunos)
3294         FFSERVERLDFLAGS=""
3295         SHFLAGS='-shared -Wl,-h,$$(@F)'
3296         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3297         network_extralibs="-lsocket -lnsl"
3298         add_cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
3299         # When using suncc to build, the Solaris linker will mark
3300         # an executable with each instruction set encountered by
3301         # the Solaris assembler.  As our libraries contain their own
3302         # guards for processor-specific code, instead suppress
3303         # generation of the HWCAPS ELF section on Solaris x86 only.
3304         enabled_all suncc x86 && echo "hwcap_1 = OVERRIDE;" > mapfile && add_ldflags -Wl,-M,mapfile
3305         nm_default='nm -P -g'
3306         ;;
3307     netbsd)
3308         disable symver
3309         oss_indev_extralibs="-lossaudio"
3310         oss_outdev_extralibs="-lossaudio"
3311         enabled gcc || check_ldflags -Wl,-zmuldefs
3312         ;;
3313     openbsd|bitrig)
3314         disable symver
3315         SHFLAGS='-shared'
3316         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3317         SLIB_INSTALL_LINKS=
3318         oss_indev_extralibs="-lossaudio"
3319         oss_outdev_extralibs="-lossaudio"
3320         ;;
3321     dragonfly)
3322         disable symver
3323         ;;
3324     freebsd)
3325         ;;
3326     bsd/os)
3327         add_extralibs -lpoll -lgnugetopt
3328         strip="strip -d"
3329         ;;
3330     darwin)
3331         gas="gas-preprocessor.pl $cc"
3332         enabled ppc && add_asflags -force_cpusubtype_ALL
3333         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3334         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3335         strip="${strip} -x"
3336         add_ldflags -Wl,-dynamic,-search_paths_first
3337         SLIBSUF=".dylib"
3338         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3339         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3340         FFSERVERLDFLAGS=-Wl,-bind_at_load
3341         objformat="macho"
3342         enabled x86_64 && objformat="macho64"
3343         enabled_any pic shared ||
3344             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3345         ;;
3346     mingw32*)
3347         if test $target_os = "mingw32ce"; then
3348             disable network
3349         else
3350             target_os=mingw32
3351         fi
3352         LIBTARGET=i386
3353         if enabled x86_64; then
3354             LIBTARGET="i386:x86-64"
3355         elif enabled arm; then
3356             LIBTARGET=arm-wince
3357         fi
3358         shlibdir_default="$bindir_default"
3359         SLIBPREF=""
3360         SLIBSUF=".dll"
3361         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3362         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3363         dlltool="${cross_prefix}dlltool"
3364         if check_cmd lib.exe -list; then
3365             SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); lib.exe /machine:$(LIBTARGET) /def:$$(@:$(SLIBSUF)=.def) /out:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3366             if enabled x86_64; then
3367                 LIBTARGET=x64
3368             fi
3369         elif check_cmd $dlltool --version; then
3370             SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3371         fi
3372         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3373         SLIB_INSTALL_LINKS=
3374         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3375         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3376         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3377         objformat="win32"
3378         ranlib=:
3379         enable dos_paths
3380         ;;
3381     win32|win64)
3382         if enabled shared; then
3383             # Link to the import library instead of the normal static library
3384             # for shared libs.
3385             LD_LIB='%.lib'
3386             # Cannot build shared and static libraries at the same time with
3387             # MSVC.
3388             disable static
3389         fi
3390         shlibdir_default="$bindir_default"
3391         SLIBPREF=""
3392         SLIBSUF=".dll"
3393         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3394         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3395         SLIB_CREATE_DEF_CMD='makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3396         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3397         SLIB_INSTALL_LINKS=
3398         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3399         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3400         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3401         objformat="win32"
3402         ranlib=:
3403         enable dos_paths
3404         ;;
3405     cygwin*)
3406         target_os=cygwin
3407         shlibdir_default="$bindir_default"
3408         SLIBPREF="cyg"
3409         SLIBSUF=".dll"
3410         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3411         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3412         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3413         SLIB_INSTALL_LINKS=
3414         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3415         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3416         objformat="win32"
3417         enable dos_paths
3418         ;;
3419     *-dos|freedos|opendos)
3420         network_extralibs="-lsocket"
3421         objformat="coff"
3422         enable dos_paths
3423         add_cppflags -U__STRICT_ANSI__
3424         ;;
3425     linux)
3426         enable dv1394
3427         ;;
3428     irix*)
3429         target_os=irix
3430         ranlib="echo ignoring ranlib"
3431         ;;
3432     os/2*)
3433         strip="lxlite -CS"
3434         ln_s="cp -f"
3435         objformat="aout"
3436         add_cppflags -D_GNU_SOURCE
3437         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3438         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3439         FFSERVERLDFLAGS=""
3440         LIBSUF="_s.a"
3441         SLIBPREF=""
3442         SLIBSUF=".dll"
3443         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3444         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3445         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3446             echo PROTMODE >> $(SUBDIR)$(NAME).def; \
3447             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3448             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3449             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3450             emxexp -o $(OBJS) >> $(SUBDIR)$(NAME).def'
3451         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3452             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3453         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3454         enable dos_paths
3455         enable_weak os2threads
3456         ;;
3457     gnu/kfreebsd)
3458         add_cppflags -D_BSD_SOURCE
3459         ;;
3460     gnu)
3461         ;;
3462     qnx)
3463         add_cppflags -D_QNX_SOURCE
3464         network_extralibs="-lsocket"
3465         ;;
3466     symbian)
3467         SLIBSUF=".dll"
3468         enable dos_paths
3469         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3470         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3471         add_ldflags -Wl,--target1-abs,--no-undefined \
3472                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3473                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3474         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3475                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3476                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3477         ;;
3478     osf1)
3479         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3480         FFSERVERLDFLAGS=
3481         ;;
3482     minix)
3483         ;;
3484     plan9)
3485         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3486                      -D_REENTRANT_SOURCE        \
3487                      -D_RESEARCH_SOURCE         \
3488                      -DFD_SETSIZE=96            \
3489                      -DHAVE_SOCK_OPTS
3490         add_compat strtod.o strtod=avpriv_strtod
3491         network_extralibs='-lbsd'
3492         exeobjs=compat/plan9/main.o
3493         disable ffserver
3494         cp_f='cp'
3495         ;;
3496     none)
3497         ;;
3498     *)
3499         die "Unknown OS '$target_os'."
3500         ;;
3501 esac
3502
3503 # determine libc flavour
3504
3505 # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3506 if check_cpp_condition features.h "defined __UCLIBC__"; then
3507     libc_type=uclibc
3508     add_cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3509 elif check_cpp_condition features.h "defined __GLIBC__"; then
3510     libc_type=glibc
3511     add_cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3512 # MinGW headers can be installed on Cygwin, so check for newlib first.
3513 elif check_cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3514     libc_type=newlib
3515     add_cppflags -U__STRICT_ANSI__
3516 elif check_header _mingw.h; then
3517     libc_type=mingw
3518     check_cpp_condition _mingw.h \
3519         "defined (__MINGW64_VERSION_MAJOR) || (__MINGW32_MAJOR_VERSION > 3) || \
3520             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3521         die "ERROR: MinGW runtime version must be >= 3.15."
3522     add_cppflags -U__STRICT_ANSI__
3523     if check_cpp_condition _mingw.h "defined(__MINGW64_VERSION_MAJOR) && \
3524             __MINGW64_VERSION_MAJOR < 3"; then
3525         add_compat msvcrt/snprintf.o
3526         add_cflags "-include $source_path/compat/msvcrt/snprintf.h"
3527     fi
3528 elif check_func_headers stdlib.h _get_doserrno; then
3529     libc_type=msvcrt
3530     add_compat strtod.o strtod=avpriv_strtod
3531     add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3532                                  _snprintf=avpriv_snprintf  \
3533                                  vsnprintf=avpriv_vsnprintf
3534 elif check_cpp_condition stddef.h "defined __KLIBC__"; then
3535     libc_type=klibc
3536 fi
3537
3538 test -n "$libc_type" && enable $libc_type
3539
3540 # hacks for compiler/libc/os combinations
3541
3542 if enabled_all tms470 glibc; then
3543     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
3544     add_cppflags -D__USER_LABEL_PREFIX__=
3545     add_cppflags -D__builtin_memset=memset
3546     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
3547     add_cflags   -pds=48    # incompatible redefinition of macro
3548 fi
3549
3550 if enabled_all ccc glibc; then
3551     add_ldflags -Wl,-z,now  # calls to libots crash without this
3552 fi
3553
3554 esc(){
3555     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
3556 }
3557
3558 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $FFMPEG_CONFIGURATION)" >config.fate
3559
3560 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable pic
3561
3562 set_default $PATHS_LIST
3563 set_default nm
3564
3565 # we need to build at least one lib type
3566 if ! enabled_any static shared; then
3567     cat <<EOF
3568 At least one library type must be built.
3569 Specify --enable-static to build the static libraries or --enable-shared to
3570 build the shared libraries as well. To only build the shared libraries specify
3571 --disable-static in addition to --enable-shared.
3572 EOF
3573     exit 1;
3574 fi
3575
3576 die_license_disabled() {
3577     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
3578 }
3579
3580 die_license_disabled_gpl() {
3581     enabled $1 || { enabled $2 && die "$2 is incompatible with the gpl and --enable-$1 is not specified."; }
3582 }
3583
3584 die_license_disabled gpl libcdio
3585 die_license_disabled gpl libutvideo
3586 die_license_disabled gpl libvidstab
3587 die_license_disabled gpl libx264
3588 die_license_disabled gpl libxavs
3589 die_license_disabled gpl libxvid
3590 die_license_disabled gpl x11grab
3591
3592 die_license_disabled nonfree libaacplus
3593 die_license_disabled nonfree libfaac
3594 enabled gpl && die_license_disabled_gpl nonfree libfdk_aac
3595 enabled gpl && die_license_disabled_gpl nonfree openssl
3596
3597 die_license_disabled version3 libopencore_amrnb
3598 die_license_disabled version3 libopencore_amrwb
3599 die_license_disabled version3 libvo_aacenc
3600 die_license_disabled version3 libvo_amrwbenc
3601
3602 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
3603
3604 disabled optimizations || check_cflags -fomit-frame-pointer
3605
3606 enable_pic() {
3607     enable pic
3608     add_cppflags -DPIC
3609     add_cflags   -fPIC
3610     add_asflags  -fPIC
3611 }
3612
3613 enabled pic && enable_pic
3614
3615 check_cc <<EOF || die "Symbol mangling check failed."
3616 int ff_extern;
3617 EOF
3618 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
3619 extern_prefix=${sym%%ff_extern*}
3620
3621 check_cc <<EOF && enable_weak inline_asm
3622 void foo(void) { __asm__ volatile ("" ::); }
3623 EOF
3624
3625 _restrict=
3626 for restrict_keyword in restrict __restrict__ __restrict; do
3627     check_cc <<EOF && _restrict=$restrict_keyword && break
3628 void foo(char * $restrict_keyword p);
3629 EOF
3630 done
3631
3632 check_cc <<EOF && enable attribute_packed
3633 struct { int x; } __attribute__((packed)) x;
3634 EOF
3635
3636 check_cc <<EOF && enable attribute_may_alias
3637 union { int x; } __attribute__((may_alias)) x;
3638 EOF
3639
3640 check_cc <<EOF || die "endian test failed"
3641 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
3642 EOF
3643 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
3644
3645 if enabled alpha; then
3646
3647     check_cflags -mieee
3648
3649 elif enabled arm; then
3650
3651     check_cpp_condition stddef.h "defined __thumb__" && check_cc <<EOF && enable_weak thumb
3652 float func(float a, float b){ return a+b; }
3653 EOF
3654
3655     enabled thumb && check_cflags -mthumb || check_cflags -marm
3656     nogas=die
3657
3658     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
3659         enable vfp_args
3660     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__"; then
3661         case "${cross_prefix:-$cc}" in
3662             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
3663             *) check_ld "cc" <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
3664 __asm__ (".eabi_attribute 28, 1");
3665 int main(void) { return 0; }
3666 EOF
3667         esac
3668         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
3669     fi
3670
3671     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
3672     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
3673     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
3674     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
3675     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
3676     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
3677
3678     [ $target_os = linux ] ||
3679         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
3680             $ARCH_EXT_LIST_ARM
3681
3682     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
3683     check_inline_asm asm_mod_y '"vmul.i32 d0, d0, %y0" :: "x"(0)'
3684
3685     enabled_all armv6t2 shared !pic && enable_pic
3686
3687 elif enabled mips; then
3688
3689     check_inline_asm loongson '"dmult.g $1, $2, $3"'
3690     enabled mips32r2  && add_cflags "-mips32r2" && add_asflags "-mips32r2" &&
3691      check_inline_asm mips32r2  '"rotr $t0, $t1, 1"'
3692     enabled mipsdspr1 && add_cflags "-mdsp" && add_asflags "-mdsp" &&
3693      check_inline_asm mipsdspr1 '"addu.qb $t0, $t1, $t2"'
3694     enabled mipsdspr2 && add_cflags "-mdspr2" && add_asflags "-mdspr2" &&
3695      check_inline_asm mipsdspr2 '"absq_s.qb $t0, $t1"'
3696     enabled mipsfpu   && add_cflags "-mhard-float" && add_asflags "-mhard-float" &&
3697      check_inline_asm mipsfpu   '"madd.d $f0, $f2, $f4, $f6"'
3698
3699 elif enabled parisc; then
3700
3701     if enabled gcc; then
3702         case $($cc -dumpversion) in
3703             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
3704         esac
3705     fi
3706
3707 elif enabled ppc; then
3708
3709     enable local_aligned_8 local_aligned_16
3710
3711     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
3712     check_inline_asm ibm_asm   '"add 0, 0, 0"'
3713     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
3714     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
3715
3716     # AltiVec flags: The FSF version of GCC differs from the Apple version
3717     if enabled altivec; then
3718         nogas=warn
3719         check_cflags -maltivec -mabi=altivec &&
3720         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
3721         check_cflags -faltivec
3722
3723         # check if our compiler supports Motorola AltiVec C API
3724         check_cc <<EOF || disable altivec
3725 $inc_altivec_h
3726 int main(void) {
3727     vector signed int v1 = (vector signed int) { 0 };
3728     vector signed int v2 = (vector signed int) { 1 };
3729     v1 = vec_add(v1, v2);
3730     return 0;
3731 }
3732 EOF
3733
3734         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"