configure: mips: Support mips r6, r2 and r1
[ffmpeg.git] / configure
1 #!/bin/sh
2 #
3 # Libav configure script
4 #
5 # Copyright (c) 2000-2002 Fabrice Bellard
6 # Copyright (c) 2005-2008 Diego Biurrun
7 # Copyright (c) 2005-2008 Mans Rullgard
8 #
9
10 # Prevent locale nonsense from breaking basic text processing.
11 LC_ALL=C
12 export LC_ALL
13
14 # make sure we are running under a compatible shell
15 # try to make this part work with most shells
16
17 try_exec(){
18     echo "Trying shell $1"
19     type "$1" > /dev/null 2>&1 && exec "$@"
20 }
21
22 unset foo
23 (: ${foo%%bar}) 2> /dev/null
24 E1="$?"
25
26 (: ${foo?}) 2> /dev/null
27 E2="$?"
28
29 if test "$E1" != 0 || test "$E2" = 0; then
30     echo "Broken shell detected.  Trying alternatives."
31     export FF_CONF_EXEC
32     if test "0$FF_CONF_EXEC" -lt 1; then
33         FF_CONF_EXEC=1
34         try_exec bash "$0" "$@"
35     fi
36     if test "0$FF_CONF_EXEC" -lt 2; then
37         FF_CONF_EXEC=2
38         try_exec ksh "$0" "$@"
39     fi
40     if test "0$FF_CONF_EXEC" -lt 3; then
41         FF_CONF_EXEC=3
42         try_exec /usr/xpg4/bin/sh "$0" "$@"
43     fi
44     echo "No compatible shell script interpreter found."
45     echo "This configure script requires a POSIX-compatible shell"
46     echo "such as bash or ksh."
47     echo "THIS IS NOT A BUG IN LIBAV, DO NOT REPORT IT AS SUCH."
48     echo "Instead, install a working POSIX-compatible shell."
49     echo "Disabling this configure test will create a broken Libav."
50     if test "$BASH_VERSION" = '2.04.0(1)-release'; then
51         echo "This bash version ($BASH_VERSION) is broken on your platform."
52         echo "Upgrade to a later version if available."
53     fi
54     exit 1
55 fi
56
57 test -d /usr/xpg4/bin && PATH=/usr/xpg4/bin:$PATH
58
59 show_help(){
60     cat <<EOF
61 Usage: configure [options]
62 Options: [defaults in brackets after descriptions]
63
64 Help options:
65   --help                   print this message
66   --list-decoders          show all available decoders
67   --list-encoders          show all available encoders
68   --list-hwaccels          show all available hardware accelerators
69   --list-demuxers          show all available demuxers
70   --list-muxers            show all available muxers
71   --list-parsers           show all available parsers
72   --list-protocols         show all available protocols
73   --list-bsfs              show all available bitstream filters
74   --list-indevs            show all available input devices
75   --list-outdevs           show all available output devices
76   --list-filters           show all available filters
77
78 Standard options:
79   --logfile=FILE           log tests and output to FILE [config.log]
80   --disable-logging        do not log configure debug information
81   --prefix=PREFIX          install in PREFIX [$prefix]
82   --bindir=DIR             install binaries in DIR [PREFIX/bin]
83   --datadir=DIR            install data files in DIR [PREFIX/share/avconv]
84   --docdir=DIR             install documentation in DIR [PREFIX/share/doc/libav]
85   --libdir=DIR             install libs in DIR [PREFIX/lib]
86   --shlibdir=DIR           install shared libs in DIR [PREFIX/lib]
87   --incdir=DIR             install includes in DIR [PREFIX/include]
88   --mandir=DIR             install man page in DIR [PREFIX/share/man]
89   --enable-rpath           use rpath when linking programs [USE WITH CARE]
90
91 Licensing options:
92   --enable-gpl             allow use of GPL code, the resulting libs
93                            and binaries will be under GPL [no]
94   --enable-version3        upgrade (L)GPL to version 3 [no]
95   --enable-nonfree         allow use of nonfree code, the resulting libs
96                            and binaries will be unredistributable [no]
97
98 Configuration options:
99   --disable-static         do not build static libraries [no]
100   --enable-shared          build shared libraries [no]
101   --enable-small           optimize for size instead of speed
102   --enable-runtime-cpudetect detect cpu capabilities at runtime (bigger binary)
103   --enable-gray            enable full grayscale support (slower color)
104   --disable-swscale-alpha  disable alpha channel support in swscale
105   --disable-all            disable building components, libraries and programs
106
107 Program options:
108   --disable-programs       do not build command line programs
109   --disable-avconv         disable avconv build
110   --disable-avplay         disable avplay build
111   --disable-avprobe        disable avprobe build
112   --disable-avserver       deprecated, does nothing
113
114 Component options:
115   --disable-doc            do not build documentation
116   --disable-avdevice       disable libavdevice build
117   --disable-avcodec        disable libavcodec build
118   --disable-avformat       disable libavformat build
119   --disable-avutil         disable libavutil build
120   --disable-swscale        disable libswscale build
121   --disable-avfilter       disable video filter support [no]
122   --disable-avresample     disable libavresample build [no]
123   --disable-pthreads       disable pthreads [auto]
124   --disable-w32threads     disable Win32 threads [auto]
125   --disable-network        disable network support [no]
126   --disable-dct            disable DCT code
127   --disable-error-resilience disable error resilience code
128   --disable-lsp            disable LSP code
129   --disable-lzo            disable LZO decoder code
130   --disable-mdct           disable MDCT code
131   --disable-rdft           disable RDFT code
132   --disable-fft            disable FFT code
133   --disable-faan           disable floating point AAN (I)DCT code
134
135 Hardware accelerators:
136   --enable-d3d11va         enable D3D11VA code
137   --enable-dxva2           enable DXVA2 code
138   --enable-vaapi           enable VAAPI code
139   --enable-vda             enable VDA code
140   --enable-vdpau           enable VDPAU code
141
142 Individual component options:
143   --disable-everything     disable all components listed below
144   --disable-encoder=NAME   disable encoder NAME
145   --enable-encoder=NAME    enable encoder NAME
146   --disable-encoders       disable all encoders
147   --disable-decoder=NAME   disable decoder NAME
148   --enable-decoder=NAME    enable decoder NAME
149   --disable-decoders       disable all decoders
150   --disable-hwaccel=NAME   disable hwaccel NAME
151   --enable-hwaccel=NAME    enable hwaccel NAME
152   --disable-hwaccels       disable all hwaccels
153   --disable-muxer=NAME     disable muxer NAME
154   --enable-muxer=NAME      enable muxer NAME
155   --disable-muxers         disable all muxers
156   --disable-demuxer=NAME   disable demuxer NAME
157   --enable-demuxer=NAME    enable demuxer NAME
158   --disable-demuxers       disable all demuxers
159   --enable-parser=NAME     enable parser NAME
160   --disable-parser=NAME    disable parser NAME
161   --disable-parsers        disable all parsers
162   --enable-bsf=NAME        enable bitstream filter NAME
163   --disable-bsf=NAME       disable bitstream filter NAME
164   --disable-bsfs           disable all bitstream filters
165   --enable-protocol=NAME   enable protocol NAME
166   --disable-protocol=NAME  disable protocol NAME
167   --disable-protocols      disable all protocols
168   --enable-indev=NAME      enable input device NAME
169   --disable-indev=NAME     disable input device NAME
170   --disable-indevs         disable input devices
171   --enable-outdev=NAME     enable output device NAME
172   --disable-outdev=NAME    disable output device NAME
173   --disable-outdevs        disable output devices
174   --disable-devices        disable all devices
175   --enable-filter=NAME     enable filter NAME
176   --disable-filter=NAME    disable filter NAME
177   --disable-filters        disable all filters
178
179 External library support:
180   --enable-avisynth        enable reading of AviSynth script files [no]
181   --enable-bzlib           enable bzlib [autodetect]
182   --enable-frei0r          enable frei0r video filtering
183   --enable-gnutls          enable gnutls [no]
184   --enable-libbs2b         enable bs2b DSP library [no]
185   --enable-libcdio         enable audio CD grabbing with libcdio
186   --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394
187                            and libraw1394 [no]
188   --enable-libdcadec       enable DCA decoding via libdcadec [no]
189   --enable-libfaac         enable AAC encoding via libfaac [no]
190   --enable-libfdk-aac      enable AAC de/encoding via libfdk-aac [no]
191   --enable-libfreetype     enable libfreetype [no]
192   --enable-libgsm          enable GSM de/encoding via libgsm [no]
193   --enable-libilbc         enable iLBC de/encoding via libilbc [no]
194   --enable-libmfx          enable HW acceleration through libmfx
195   --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
196   --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
197   --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
198   --enable-libopencv       enable video filtering via libopencv [no]
199   --enable-libopenh264     enable H.264 encoding via OpenH264 [no]
200   --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]
201   --enable-libopus         enable Opus de/encoding via libopus [no]
202   --enable-libpulse        enable Pulseaudio input via libpulse [no]
203   --enable-librtmp         enable RTMP[E] support via librtmp [no]
204   --enable-libschroedinger enable Dirac de/encoding via libschroedinger [no]
205   --enable-libsnappy       enable Snappy compression [no]
206   --enable-libspeex        enable Speex de/encoding via libspeex [no]
207   --enable-libtheora       enable Theora encoding via libtheora [no]
208   --enable-libtwolame      enable MP2 encoding via libtwolame [no]
209   --enable-libvo-aacenc    enable AAC encoding via libvo-aacenc [no]
210   --enable-libvo-amrwbenc  enable AMR-WB encoding via libvo-amrwbenc [no]
211   --enable-libvorbis       enable Vorbis encoding via libvorbis [no]
212   --enable-libvpx          enable VP8 and VP9 de/encoding via libvpx [no]
213   --enable-libwavpack      enable wavpack encoding via libwavpack [no]
214   --enable-libwebp         enable WebP encoding via libwebp [no]
215   --enable-libx264         enable H.264 encoding via x264 [no]
216   --enable-libx265         enable HEVC encoding via x265 [no]
217   --enable-libxavs         enable AVS encoding via xavs [no]
218   --enable-libxcb          enable X11 grabbing using XCB [no]
219   --enable-libxcb-shm      enable X11 grabbing shm communication [auto]
220   --enable-libxcb-xfixes   enable X11 grabbing mouse rendering [auto]
221   --enable-libxvid         enable Xvid encoding via xvidcore,
222                            native MPEG-4/Xvid encoder exists [no]
223   --enable-mmal            enable decoding via MMAL [no]
224   --enable-nvenc           enable encoding via NVENC [no]
225   --enable-openssl         enable openssl [no]
226   --enable-x11grab         enable X11 grabbing (legacy) [no]
227   --enable-zlib            enable zlib [autodetect]
228
229 Toolchain options:
230   --arch=ARCH              select architecture [$arch]
231   --cpu=CPU                select the minimum required CPU (affects
232                            instruction selection, may crash on older CPUs)
233   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
234   --enable-cross-compile   assume a cross-compiler is used
235   --sysroot=PATH           root of cross-build tree
236   --sysinclude=PATH        location of cross-build system headers
237   --target-os=OS           compiler targets OS [$target_os]
238   --target-exec=CMD        command to run executables on target
239   --target-path=DIR        path to view of build directory on target
240   --target-samples=DIR     path to samples directory on target
241   --toolchain=NAME         set tool defaults according to NAME
242   --nm=NM                  use nm tool
243   --ar=AR                  use archive tool AR [$ar_default]
244   --as=AS                  use assembler AS [$as_default]
245   --cc=CC                  use C compiler CC [$cc_default]
246   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
247   --ld=LD                  use linker LD
248   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
249   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
250   --host-cc=HOSTCC         use host C compiler HOSTCC
251   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
252   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
253   --host-ld=HOSTLD         use host linker HOSTLD
254   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
255   --host-libs=HLIBS        use libs HLIBS when linking for host
256   --host-os=OS             compiler host OS [$target_os]
257   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
258   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
259   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
260   --extra-libs=ELIBS       add ELIBS [$ELIBS]
261   --extra-version=STRING   version string suffix []
262   --optflags=OPTFLAGS      override optimization-related compiler flags
263   --build-suffix=SUFFIX    library name suffix []
264   --enable-pic             build position-independent code
265   --enable-thumb           compile for Thumb instruction set
266   --enable-lto             use link-time optimization
267   --env="ENV=override"     override the environment variables
268
269 Advanced options (experts only):
270   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
271   --disable-symver         disable symbol versioning
272   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
273   --disable-safe-bitstream-reader
274                            disable buffer boundary checking in bitreaders
275                            (faster, but may crash)
276   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
277   --enable-sram            allow use of on-chip SRAM
278
279 Optimization options (experts only):
280   --disable-asm            disable all assembly optimizations
281   --disable-altivec        disable AltiVec optimizations
282   --disable-vsx            disable VSX optimizations
283   --disable-power8         disable POWER8 optimizations
284   --disable-amd3dnow       disable 3DNow! optimizations
285   --disable-amd3dnowext    disable 3DNow! extended optimizations
286   --disable-mmx            disable MMX optimizations
287   --disable-mmxext         disable MMXEXT optimizations
288   --disable-sse            disable SSE optimizations
289   --disable-sse2           disable SSE2 optimizations
290   --disable-sse3           disable SSE3 optimizations
291   --disable-ssse3          disable SSSE3 optimizations
292   --disable-sse4           disable SSE4 optimizations
293   --disable-sse42          disable SSE4.2 optimizations
294   --disable-avx            disable AVX optimizations
295   --disable-xop            disable XOP optimizations
296   --disable-fma3           disable FMA3 optimizations
297   --disable-fma4           disable FMA4 optimizations
298   --disable-avx2           disable AVX2 optimizations
299   --disable-armv5te        disable armv5te optimizations
300   --disable-armv6          disable armv6 optimizations
301   --disable-armv6t2        disable armv6t2 optimizations
302   --disable-vfp            disable VFP optimizations
303   --disable-neon           disable NEON optimizations
304   --disable-inline-asm     disable use of inline assembly
305   --disable-yasm           disable use of nasm/yasm assembly
306
307 Developer options (useful when working on Libav itself):
308   --disable-debug          disable debugging symbols
309   --enable-debug=LEVEL     set the debug level [$debuglevel]
310   --disable-optimizations  disable compiler optimizations
311   --enable-extra-warnings  enable more compiler warnings
312   --samples=PATH           location of test samples for FATE, if not set use
313                            \$LIBAV_SAMPLES at make invocation time.
314   --enable-neon-clobber-test check NEON registers for clobbering (should be
315                            used only for debugging purposes)
316   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
317                            should be used only for debugging purposes)
318   --enable-random          randomly enable/disable components
319   --disable-random
320   --enable-random=LIST     randomly enable/disable specific components or
321   --disable-random=LIST    component groups. LIST is a comma-separated list
322                            of NAME[:PROB] entries where NAME is a component
323                            (group) and PROB the probability associated with
324                            NAME (default 0.5).
325   --random-seed=VALUE      seed value for --enable/disable-random
326   --disable-valgrind-backtrace do not print a backtrace under Valgrind
327                            (only applies to --disable-optimizations builds)
328
329 NOTE: Object files are built at the place where configure is launched.
330 EOF
331   exit 0
332 }
333
334 quotes='""'
335
336 log(){
337     echo "$@" >> $logfile
338 }
339
340 log_file(){
341     log BEGIN $1
342     pr -n -t $1 >> $logfile
343     log END $1
344 }
345
346 echolog(){
347     log "$@"
348     echo "$@"
349 }
350
351 warn(){
352     log "WARNING: $*"
353     WARNINGS="${WARNINGS}WARNING: $*\n"
354 }
355
356 die(){
357     echolog "$@"
358     cat <<EOF
359
360 If you think configure made a mistake, make sure you are using the latest
361 version from Git.  If the latest version fails, report the problem to the
362 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
363 EOF
364     if disabled logging; then
365         cat <<EOF
366 Rerun configure with logging enabled (do not use --disable-logging), and
367 include the log this produces with your report.
368 EOF
369     else
370         cat <<EOF
371 Include the log file "$logfile" produced by configure as this will help
372 solving the problem.
373 EOF
374     fi
375     exit 1
376 }
377
378 # Avoid locale weirdness, besides we really just want to translate ASCII.
379 toupper(){
380     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
381 }
382
383 tolower(){
384     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
385 }
386
387 c_escape(){
388     echo "$*" | sed 's/["\\]/\\\0/g'
389 }
390
391 sh_quote(){
392     v=$(echo "$1" | sed "s/'/'\\\\''/g")
393     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
394     echo "$v"
395 }
396
397 cleanws(){
398     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
399 }
400
401 filter(){
402     pat=$1
403     shift
404     for v; do
405         eval "case $v in $pat) echo $v ;; esac"
406     done
407 }
408
409 filter_out(){
410     pat=$1
411     shift
412     for v; do
413         eval "case $v in $pat) ;; *) echo $v ;; esac"
414     done
415 }
416
417 map(){
418     m=$1
419     shift
420     for v; do eval $m; done
421 }
422
423 add_suffix(){
424     suffix=$1
425     shift
426     for v; do echo ${v}${suffix}; done
427 }
428
429 set_all(){
430     value=$1
431     shift
432     for var in $*; do
433         eval $var=$value
434     done
435 }
436
437 set_weak(){
438     value=$1
439     shift
440     for var; do
441         eval : \${$var:=$value}
442     done
443 }
444
445 sanitize_var_name(){
446     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
447 }
448
449 set_safe(){
450     var=$1
451     shift
452     eval $(sanitize_var_name "$var")='$*'
453 }
454
455 get_safe(){
456     eval echo \$$(sanitize_var_name "$1")
457 }
458
459 pushvar(){
460     for pvar in $*; do
461         eval level=\${${pvar}_level:=0}
462         eval ${pvar}_${level}="\$$pvar"
463         eval ${pvar}_level=$(($level+1))
464     done
465 }
466
467 popvar(){
468     for pvar in $*; do
469         eval level=\${${pvar}_level:-0}
470         test $level = 0 && continue
471         eval level=$(($level-1))
472         eval $pvar="\${${pvar}_${level}}"
473         eval ${pvar}_level=$level
474         eval unset ${pvar}_${level}
475     done
476 }
477
478 enable(){
479     set_all yes $*
480 }
481
482 disable(){
483     set_all no $*
484 }
485
486 enable_weak(){
487     set_weak yes $*
488 }
489
490 disable_weak(){
491     set_weak no $*
492 }
493
494 enable_safe(){
495     for var; do
496         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
497     done
498 }
499
500 disable_safe(){
501     for var; do
502         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
503     done
504 }
505
506 do_enable_deep(){
507     for var; do
508         enabled $var && continue
509         eval sel="\$${var}_select"
510         eval sgs="\$${var}_suggest"
511         pushvar var sgs
512         enable_deep $sel
513         popvar sgs
514         enable_deep_weak $sgs
515         popvar var
516     done
517 }
518
519 enable_deep(){
520     do_enable_deep $*
521     enable $*
522 }
523
524 enable_deep_weak(){
525     for var; do
526         disabled $var && continue
527         pushvar var
528         do_enable_deep $var
529         popvar var
530         enable_weak $var
531     done
532 }
533
534 enabled(){
535     test "${1#!}" = "$1" && op== || op=!=
536     eval test "x\$${1#!}" $op "xyes"
537 }
538
539 disabled(){
540     test "${1#!}" = "$1" && op== || op=!=
541     eval test "x\$${1#!}" $op "xno"
542 }
543
544 enabled_all(){
545     for opt; do
546         enabled $opt || return 1
547     done
548 }
549
550 disabled_all(){
551     for opt; do
552         disabled $opt || return 1
553     done
554 }
555
556 enabled_any(){
557     for opt; do
558         enabled $opt && return 0
559     done
560 }
561
562 disabled_any(){
563     for opt; do
564         disabled $opt && return 0
565     done
566     return 1
567 }
568
569 set_default(){
570     for opt; do
571         eval : \${$opt:=\$${opt}_default}
572     done
573 }
574
575 is_in(){
576     value=$1
577     shift
578     for var in $*; do
579         [ $var = $value ] && return 0
580     done
581     return 1
582 }
583
584 do_check_deps(){
585     for cfg; do
586         cfg="${cfg#!}"
587         enabled ${cfg}_checking && die "Circular dependency for $cfg."
588         disabled ${cfg}_checking && continue
589         enable ${cfg}_checking
590         append allopts $cfg
591
592         eval dep_all="\$${cfg}_deps"
593         eval dep_any="\$${cfg}_deps_any"
594         eval dep_sel="\$${cfg}_select"
595         eval dep_sgs="\$${cfg}_suggest"
596         eval dep_ifa="\$${cfg}_if"
597         eval dep_ifn="\$${cfg}_if_any"
598
599         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
600         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
601         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
602
603         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
604         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
605         enabled_all  $dep_all || disable $cfg
606         enabled_any  $dep_any || disable $cfg
607         disabled_any $dep_sel && disable $cfg
608
609         if enabled $cfg; then
610             enable_deep $dep_sel
611             enable_deep_weak $dep_sgs
612         fi
613
614         disable ${cfg}_checking
615     done
616 }
617
618 check_deps(){
619     unset allopts
620
621     do_check_deps "$@"
622
623     for cfg in $allopts; do
624         enabled $cfg || continue
625         eval dep_extralibs="\$${cfg}_extralibs"
626         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
627     done
628 }
629
630 print_config(){
631     pfx=$1
632     files=$2
633     shift 2
634     map 'eval echo "$v \${$v:-no}"' "$@" |
635     awk "BEGIN { split(\"$files\", files) }
636         {
637             c = \"$pfx\" toupper(\$1);
638             v = \$2;
639             sub(/yes/, 1, v);
640             sub(/no/,  0, v);
641             for (f in files) {
642                 file = files[f];
643                 if (file ~ /\\.h\$/) {
644                     printf(\"#define %s %d\\n\", c, v) >>file;
645                 } else if (file ~ /\\.asm\$/) {
646                     printf(\"%%define %s %d\\n\", c, v) >>file;
647                 } else if (file ~ /\\.mak\$/) {
648                     n = -v ? \"\" : \"!\";
649                     printf(\"%s%s=yes\\n\", n, c) >>file;
650                 }
651             }
652         }"
653 }
654
655 print_enabled(){
656     suf=$1
657     shift
658     for v; do
659         enabled $v && printf "%s\n" ${v%$suf};
660     done
661 }
662
663 append(){
664     var=$1
665     shift
666     eval "$var=\"\$$var $*\""
667 }
668
669 prepend(){
670     var=$1
671     shift
672     eval "$var=\"$* \$$var\""
673 }
674
675 unique(){
676     var=$1
677     uniq_list=""
678     for tok in $(eval echo \$$var); do
679         uniq_list="$(filter_out $tok $uniq_list) $tok"
680     done
681     eval "$var=\"${uniq_list}\""
682 }
683
684 add_cppflags(){
685     append CPPFLAGS "$@"
686 }
687
688 add_cflags(){
689     append CFLAGS $($cflags_filter "$@")
690 }
691
692 add_asflags(){
693     append ASFLAGS $($asflags_filter "$@")
694 }
695
696 add_ldflags(){
697     append LDFLAGS $($ldflags_filter "$@")
698 }
699
700 add_ldexeflags(){
701     append LDEXEFLAGS $($ldflags_filter "$@")
702 }
703
704 add_stripflags(){
705     append STRIPFLAGS "$@"
706 }
707
708 add_extralibs(){
709     prepend extralibs $($ldflags_filter "$@")
710 }
711
712 add_host_cppflags(){
713     append host_cppflags "$@"
714 }
715
716 add_host_cflags(){
717     append host_cflags $($host_cflags_filter "$@")
718 }
719
720 add_host_ldflags(){
721     append host_ldflags $($host_ldflags_filter "$@")
722 }
723
724 add_compat(){
725     append compat_objs $1
726     shift
727     map 'add_cppflags -D$v' "$@"
728 }
729
730 check_cmd(){
731     log "$@"
732     "$@" >> $logfile 2>&1
733 }
734
735 cc_o(){
736     eval printf '%s\\n' $CC_O
737 }
738
739 cc_e(){
740     eval printf '%s\\n' $CC_E
741 }
742
743 check_cc(){
744     log check_cc "$@"
745     cat > $TMPC
746     log_file $TMPC
747     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
748 }
749
750 check_cpp(){
751     log check_cpp "$@"
752     cat > $TMPC
753     log_file $TMPC
754     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
755 }
756
757 as_o(){
758     eval printf '%s\\n' $AS_O
759 }
760
761 check_as(){
762     log check_as "$@"
763     cat > $TMPS
764     log_file $TMPS
765     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
766 }
767
768 check_inline_asm(){
769     log check_inline_asm "$@"
770     name="$1"
771     code="$2"
772     shift 2
773     disable $name
774     check_cc "$@" <<EOF && enable $name
775 void foo(void){ __asm__ volatile($code); }
776 EOF
777 }
778
779 check_insn(){
780     log check_insn "$@"
781     check_inline_asm ${1}_inline "\"$2\""
782     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
783 }
784
785 check_yasm(){
786     log check_yasm "$@"
787     echo "$1" > $TMPS
788     log_file $TMPS
789     shift 1
790     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
791 }
792
793 ld_o(){
794     eval printf '%s\\n' $LD_O
795 }
796
797 check_ld(){
798     log check_ld "$@"
799     flags=$(filter_out '-l*' "$@")
800     libs=$(filter '-l*' "$@")
801     check_cc $($cflags_filter $flags) || return
802     flags=$($ldflags_filter $flags)
803     libs=$($ldflags_filter $libs)
804     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
805 }
806
807 print_include(){
808     hdr=$1
809     test "${hdr%.h}" = "${hdr}" &&
810         echo "#include $hdr"    ||
811         echo "#include <$hdr>"
812 }
813
814 check_code(){
815     log check_code "$@"
816     check=$1
817     headers=$2
818     code=$3
819     shift 3
820     {
821         for hdr in $headers; do
822             print_include $hdr
823         done
824         echo "int main(void) { $code; return 0; }"
825     } | check_$check "$@"
826 }
827
828 check_cppflags(){
829     log check_cppflags "$@"
830     check_cc "$@" <<EOF && append CPPFLAGS "$@"
831 int x;
832 EOF
833 }
834
835 test_cflags(){
836     log test_cflags "$@"
837     set -- $($cflags_filter "$@")
838     check_cc "$@" <<EOF
839 int x;
840 EOF
841 }
842
843 check_cflags(){
844     log check_cflags "$@"
845     test_cflags "$@" && add_cflags "$@"
846 }
847
848 test_ldflags(){
849     log test_ldflags "$@"
850     check_ld "$@" <<EOF
851 int main(void){ return 0; }
852 EOF
853 }
854
855 check_ldflags(){
856     log check_ldflags "$@"
857     test_ldflags "$@" && add_ldflags "$@"
858 }
859
860 test_stripflags(){
861     log test_stripflags "$@"
862     # call check_cc to get a fresh TMPO
863     check_cc <<EOF
864 int main(void) { return 0; }
865 EOF
866     check_cmd $strip $STRIPFLAGS "$@" $TMPO
867 }
868
869 check_stripflags(){
870     log check_stripflags "$@"
871     test_stripflags "$@" && add_stripflags "$@"
872 }
873
874 check_header(){
875     log check_header "$@"
876     header=$1
877     shift
878     disable_safe $header
879     check_cpp "$@" <<EOF && enable_safe $header
880 #include <$header>
881 int x;
882 EOF
883 }
884
885 check_func(){
886     log check_func "$@"
887     func=$1
888     shift
889     disable $func
890     check_ld "$@" <<EOF && enable $func
891 extern int $func();
892 int main(void){ $func(); }
893 EOF
894 }
895
896 check_mathfunc(){
897     log check_mathfunc "$@"
898     func=$1
899     narg=$2
900     shift 2
901     test $narg = 2 && args="f, g" || args="f"
902     disable $func
903     check_ld "$@" <<EOF && enable $func
904 #include <math.h>
905 float foo(float f, float g) { return $func($args); }
906 int main(void){ return 0; }
907 EOF
908 }
909
910 check_func_headers(){
911     log check_func_headers "$@"
912     headers=$1
913     funcs=$2
914     shift 2
915     {
916         for hdr in $headers; do
917             print_include $hdr
918         done
919         for func in $funcs; do
920             echo "long check_$func(void) { return (long) $func; }"
921         done
922         echo "int main(void) { return 0; }"
923     } | check_ld "$@" && enable $funcs && enable_safe $headers
924 }
925
926 check_cpp_condition(){
927     log check_cpp_condition "$@"
928     header=$1
929     condition=$2
930     shift 2
931     check_cpp "$@" <<EOF
932 #include <$header>
933 #if !($condition)
934 #error "unsatisfied condition: $condition"
935 #endif
936 EOF
937 }
938
939 check_lib(){
940     log check_lib "$@"
941     header="$1"
942     func="$2"
943     shift 2
944     check_header $header && check_func $func "$@" && add_extralibs "$@"
945 }
946
947 check_lib2(){
948     log check_lib2 "$@"
949     headers="$1"
950     funcs="$2"
951     shift 2
952     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
953 }
954
955 check_pkg_config(){
956     log check_pkg_config "$@"
957     pkg="$1"
958     headers="$2"
959     funcs="$3"
960     shift 3
961     check_cmd $pkg_config --exists --print-errors $pkg || return
962     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
963     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
964     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
965         set_safe "${pkg}_cflags" $pkg_cflags   &&
966         set_safe "${pkg}_libs"   $pkg_libs
967 }
968
969 check_exec(){
970     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
971 }
972
973 check_exec_crash(){
974     code=$(cat)
975
976     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
977     # are safe but may not be available everywhere.  Thus we use
978     # raise(SIGTERM) instead.  The check is run in a subshell so we
979     # can redirect the "Terminated" message from the shell.  SIGBUS
980     # is not defined by standard C so it is used conditionally.
981
982     (check_exec "$@") >> $logfile 2>&1 <<EOF
983 #include <signal.h>
984 static void sighandler(int sig){
985     raise(SIGTERM);
986 }
987 int foo(void){
988     $code
989 }
990 int (*func_ptr)(void) = foo;
991 int main(void){
992     signal(SIGILL, sighandler);
993     signal(SIGFPE, sighandler);
994     signal(SIGSEGV, sighandler);
995 #ifdef SIGBUS
996     signal(SIGBUS, sighandler);
997 #endif
998     return func_ptr();
999 }
1000 EOF
1001 }
1002
1003 check_type(){
1004     log check_type "$@"
1005     headers=$1
1006     type=$2
1007     shift 2
1008     disable_safe "$type"
1009     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1010 }
1011
1012 check_struct(){
1013     log check_struct "$@"
1014     headers=$1
1015     struct=$2
1016     member=$3
1017     shift 3
1018     disable_safe "${struct}_${member}"
1019     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1020         enable_safe "${struct}_${member}"
1021 }
1022
1023 check_builtin(){
1024     log check_builtin "$@"
1025     name=$1
1026     headers=$2
1027     builtin=$3
1028     shift 3
1029     disable "$name"
1030     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1031 }
1032
1033 check_compile_assert(){
1034     log check_compile_assert "$@"
1035     name=$1
1036     headers=$2
1037     condition=$3
1038     shift 3
1039     disable "$name"
1040     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1041 }
1042
1043 require(){
1044     name="$1"
1045     header="$2"
1046     func="$3"
1047     shift 3
1048     check_lib $header $func "$@" || die "ERROR: $name not found"
1049 }
1050
1051 require2(){
1052     name="$1"
1053     headers="$2"
1054     func="$3"
1055     shift 3
1056     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1057 }
1058
1059 require_pkg_config(){
1060     pkg="$1"
1061     check_pkg_config "$@" || die "ERROR: $pkg not found"
1062     add_cflags    $(get_safe "${pkg}_cflags")
1063     add_extralibs $(get_safe "${pkg}_libs")
1064 }
1065
1066 hostcc_e(){
1067     eval printf '%s\\n' $HOSTCC_E
1068 }
1069
1070 hostcc_o(){
1071     eval printf '%s\\n' $HOSTCC_O
1072 }
1073
1074 check_host_cc(){
1075     log check_host_cc "$@"
1076     cat > $TMPC
1077     log_file $TMPC
1078     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1079 }
1080
1081 check_host_cpp(){
1082     log check_host_cpp "$@"
1083     cat > $TMPC
1084     log_file $TMPC
1085     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1086 }
1087
1088 check_host_cppflags(){
1089     log check_host_cppflags "$@"
1090     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1091 int x;
1092 EOF
1093 }
1094
1095 check_host_cflags(){
1096     log check_host_cflags "$@"
1097     set -- $($host_cflags_filter "$@")
1098     check_host_cc "$@" <<EOF && append host_cflags "$@"
1099 int x;
1100 EOF
1101 }
1102
1103 check_host_cpp_condition(){
1104     log check_host_cpp_condition "$@"
1105     header=$1
1106     condition=$2
1107     shift 2
1108     check_host_cpp "$@" <<EOF
1109 #include <$header>
1110 #if !($condition)
1111 #error "unsatisfied condition: $condition"
1112 #endif
1113 EOF
1114 }
1115
1116 apply(){
1117     file=$1
1118     shift
1119     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1120 }
1121
1122 cp_if_changed(){
1123     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1124     mkdir -p "$(dirname $2)"
1125     $cp_f "$1" "$2"
1126 }
1127
1128 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1129 # system-dependent things.
1130
1131 COMPONENT_LIST="
1132     bsfs
1133     decoders
1134     demuxers
1135     encoders
1136     filters
1137     hwaccels
1138     indevs
1139     muxers
1140     outdevs
1141     parsers
1142     protocols
1143 "
1144
1145 EXAMPLE_LIST="
1146     avcodec_example
1147     filter_audio_example
1148     metadata_example
1149     output_example
1150     qsvdec_example
1151     transcode_aac_example
1152 "
1153
1154 EXTERNAL_LIBRARY_LIST="
1155     avisynth
1156     bzlib
1157     frei0r
1158     gnutls
1159     libbs2b
1160     libcdio
1161     libdc1394
1162     libdcadec
1163     libfaac
1164     libfdk_aac
1165     libfontconfig
1166     libfreetype
1167     libgsm
1168     libilbc
1169     libmfx
1170     libmp3lame
1171     libopencore_amrnb
1172     libopencore_amrwb
1173     libopencv
1174     libopenh264
1175     libopenjpeg
1176     libopus
1177     libpulse
1178     librtmp
1179     libschroedinger
1180     libsnappy
1181     libspeex
1182     libtheora
1183     libtwolame
1184     libvo_aacenc
1185     libvo_amrwbenc
1186     libvorbis
1187     libvpx
1188     libwavpack
1189     libwebp
1190     libx264
1191     libx265
1192     libxavs
1193     libxcb
1194     libxcb_shm
1195     libxcb_xfixes
1196     libxvid
1197     mmal
1198     nvenc
1199     openssl
1200     x11grab
1201     zlib
1202 "
1203
1204 FEATURE_LIST="
1205     gray
1206     hardcoded_tables
1207     runtime_cpudetect
1208     safe_bitstream_reader
1209     shared
1210     small
1211     sram
1212     static
1213     swscale_alpha
1214 "
1215
1216 HWACCEL_LIST="
1217     d3d11va
1218     dxva2
1219     vaapi
1220     vda
1221     vdpau
1222 "
1223
1224 LIBRARY_LIST="
1225     avcodec
1226     avdevice
1227     avfilter
1228     avformat
1229     avresample
1230     avutil
1231     swscale
1232 "
1233
1234 LICENSE_LIST="
1235     gpl
1236     nonfree
1237     version3
1238 "
1239
1240 PROGRAM_LIST="
1241     avconv
1242     avplay
1243     avprobe
1244 "
1245
1246 SUBSYSTEM_LIST="
1247     dct
1248     doc
1249     error_resilience
1250     faan
1251     fft
1252     lsp
1253     lzo
1254     mdct
1255     network
1256     rdft
1257 "
1258
1259 CONFIG_LIST="
1260     $COMPONENT_LIST
1261     $EXAMPLE_LIST
1262     $EXTERNAL_LIBRARY_LIST
1263     $FEATURE_LIST
1264     $HWACCEL_LIST
1265     $LICENSE_LIST
1266     $LIBRARY_LIST
1267     $PROGRAM_LIST
1268     $SUBSYSTEM_LIST
1269     memalign_hack
1270     neon_clobber_test
1271     pic
1272     pod2man
1273     texi2html
1274     thumb
1275     valgrind_backtrace
1276     xmm_clobber_test
1277 "
1278
1279 THREADS_LIST="
1280     pthreads
1281     w32threads
1282 "
1283
1284 ATOMICS_LIST="
1285     atomics_gcc
1286     atomics_suncc
1287     atomics_win32
1288 "
1289
1290 ARCH_LIST="
1291     aarch64
1292     alpha
1293     arm
1294     avr32
1295     avr32_ap
1296     avr32_uc
1297     bfin
1298     ia64
1299     m68k
1300     mips
1301     mips64
1302     parisc
1303     ppc
1304     ppc64
1305     s390
1306     sh4
1307     sparc
1308     sparc64
1309     tilegx
1310     tilepro
1311     tomi
1312     x86
1313     x86_32
1314     x86_64
1315 "
1316
1317 ARCH_EXT_LIST_ARM="
1318     armv5te
1319     armv6
1320     armv6t2
1321     armv8
1322     neon
1323     vfp
1324     vfpv3
1325 "
1326
1327 ARCH_EXT_LIST_X86_SIMD="
1328     amd3dnow
1329     amd3dnowext
1330     avx
1331     avx2
1332     fma3
1333     fma4
1334     mmx
1335     mmxext
1336     sse
1337     sse2
1338     sse3
1339     sse4
1340     sse42
1341     ssse3
1342     xop
1343 "
1344
1345 ARCH_EXT_LIST_PPC="
1346     altivec
1347     dcbzl
1348     ldbrx
1349     power8
1350     ppc4xx
1351     vsx
1352 "
1353
1354 ARCH_EXT_LIST_X86="
1355     $ARCH_EXT_LIST_X86_SIMD
1356     cpunop
1357     i686
1358 "
1359
1360 ARCH_EXT_LIST_MIPS="
1361     loongson
1362     mips32r1
1363     mips64r1
1364     mips32r2
1365     mips64r2
1366     mips32r6
1367     mips64r6
1368 "
1369
1370 ARCH_EXT_LIST="
1371     $ARCH_EXT_LIST_ARM
1372     $ARCH_EXT_LIST_MIPS
1373     $ARCH_EXT_LIST_PPC
1374     $ARCH_EXT_LIST_X86
1375     vis
1376 "
1377
1378 ARCH_FEATURES="
1379     aligned_stack
1380     fast_64bit
1381     fast_clz
1382     fast_cmov
1383     local_aligned_8
1384     local_aligned_16
1385     simd_align_16
1386 "
1387
1388 BUILTIN_LIST="
1389     atomic_cas_ptr
1390     machine_rw_barrier
1391     MemoryBarrier
1392     mm_empty
1393     rdtsc
1394     sync_val_compare_and_swap
1395 "
1396 HAVE_LIST_CMDLINE="
1397     inline_asm
1398     symver
1399     yasm
1400 "
1401
1402 HAVE_LIST_PUB="
1403     bigendian
1404     fast_unaligned
1405 "
1406
1407 HEADERS_LIST="
1408     alsa_asoundlib_h
1409     altivec_h
1410     arpa_inet_h
1411     cdio_paranoia_h
1412     cdio_paranoia_paranoia_h
1413     dev_bktr_ioctl_bt848_h
1414     dev_bktr_ioctl_meteor_h
1415     dev_ic_bt8xx_h
1416     dev_video_bktr_ioctl_bt848_h
1417     dev_video_meteor_ioctl_meteor_h
1418     direct_h
1419     dlfcn_h
1420     d3d11_h
1421     dxva_h
1422     gsm_h
1423     io_h
1424     mach_mach_time_h
1425     machine_ioctl_bt848_h
1426     machine_ioctl_meteor_h
1427     malloc_h
1428     poll_h
1429     sndio_h
1430     soundcard_h
1431     sys_mman_h
1432     sys_param_h
1433     sys_resource_h
1434     sys_select_h
1435     sys_soundcard_h
1436     sys_time_h
1437     sys_un_h
1438     sys_videoio_h
1439     unistd_h
1440     valgrind_valgrind_h
1441     windows_h
1442     winsock2_h
1443 "
1444
1445 INTRINSICS_LIST="
1446     intrinsics_neon
1447 "
1448
1449 MATH_FUNCS="
1450     atanf
1451     atan2f
1452     cbrtf
1453     cosf
1454     exp2
1455     exp2f
1456     expf
1457     isinf
1458     isnan
1459     ldexpf
1460     llrint
1461     llrintf
1462     log2
1463     log2f
1464     log10f
1465     lrint
1466     lrintf
1467     powf
1468     rint
1469     round
1470     roundf
1471     sinf
1472     trunc
1473     truncf
1474 "
1475
1476 SYSTEM_FUNCS="
1477     aligned_malloc
1478     clock_gettime
1479     closesocket
1480     CommandLineToArgvW
1481     CoTaskMemFree
1482     CryptGenRandom
1483     dlopen
1484     fcntl
1485     flt_lim
1486     fork
1487     getaddrinfo
1488     gethrtime
1489     getopt
1490     GetProcessAffinityMask
1491     GetProcessMemoryInfo
1492     GetProcessTimes
1493     getrusage
1494     getservbyport
1495     GetSystemTimeAsFileTime
1496     gettimeofday
1497     gmtime_r
1498     inet_aton
1499     isatty
1500     jack_port_get_latency_range
1501     LoadLibrary
1502     localtime_r
1503     mach_absolute_time
1504     MapViewOfFile
1505     memalign
1506     mkstemp
1507     mmap
1508     mprotect
1509     nanosleep
1510     posix_memalign
1511     sched_getaffinity
1512     SetConsoleTextAttribute
1513     setmode
1514     setrlimit
1515     Sleep
1516     strerror_r
1517     sysconf
1518     sysctl
1519     usleep
1520     VirtualAlloc
1521 "
1522
1523 TOOLCHAIN_FEATURES="
1524     as_dn_directive
1525     as_func
1526     as_object_arch
1527     asm_mod_q
1528     attribute_may_alias
1529     attribute_packed
1530     ebp_available
1531     ebx_available
1532     gnu_as
1533     ibm_asm
1534     inline_asm_labels
1535     pragma_deprecated
1536     symver_asm_label
1537     symver_gnu_asm
1538     vfp_args
1539     xform_asm
1540     xmm_clobbers
1541 "
1542
1543 TYPES_LIST="
1544     CONDITION_VARIABLE_Ptr
1545     socklen_t
1546     struct_addrinfo
1547     struct_group_source_req
1548     struct_ip_mreq_source
1549     struct_ipv6_mreq
1550     struct_pollfd
1551     struct_rusage_ru_maxrss
1552     struct_sockaddr_in6
1553     struct_sockaddr_sa_len
1554     struct_sockaddr_storage
1555     struct_v4l2_frmivalenum_discrete
1556 "
1557
1558 HAVE_LIST="
1559     $ARCH_EXT_LIST
1560     $(add_suffix _external $ARCH_EXT_LIST)
1561     $(add_suffix _inline   $ARCH_EXT_LIST)
1562     $ARCH_FEATURES
1563     $ATOMICS_LIST
1564     $BUILTIN_LIST
1565     $HAVE_LIST_CMDLINE
1566     $HAVE_LIST_PUB
1567     $HEADERS_LIST
1568     $INTRINSICS_LIST
1569     $MATH_FUNCS
1570     $SYSTEM_FUNCS
1571     $THREADS_LIST
1572     $TOOLCHAIN_FEATURES
1573     $TYPES_LIST
1574     atomics_native
1575     dos_paths
1576     dxva2_lib
1577     libc_msvcrt
1578     libdc1394_1
1579     libdc1394_2
1580     sdl
1581     section_data_rel_ro
1582     threads
1583     vaapi_x11
1584     vdpau_x11
1585     xlib
1586 "
1587
1588 # options emitted with CONFIG_ prefix but not available on the command line
1589 CONFIG_EXTRA="
1590     aandcttables
1591     ac3dsp
1592     audio_frame_queue
1593     audiodsp
1594     blockdsp
1595     bswapdsp
1596     cabac
1597     dvprofile
1598     faandct
1599     faanidct
1600     fdctdsp
1601     flacdsp
1602     fmtconvert
1603     g722dsp
1604     gcrypt
1605     gmp
1606     golomb
1607     gplv3
1608     h263dsp
1609     h264chroma
1610     h264dsp
1611     h264pred
1612     h264qpel
1613     hpeldsp
1614     huffman
1615     huffyuvdsp
1616     huffyuvencdsp
1617     idctdsp
1618     iirfilter
1619     imdct15
1620     intrax8
1621     ividsp
1622     jpegtables
1623     libx262
1624     lgplv3
1625     lpc
1626     lzf
1627     me_cmp
1628     mpeg_er
1629     mpegaudio
1630     mpegaudiodsp
1631     mpegvideo
1632     mpegvideoenc
1633     mss34dsp
1634     pixblockdsp
1635     qpeldsp
1636     qsv
1637     qsvdec
1638     qsvenc
1639     rangecoder
1640     riffdec
1641     riffenc
1642     rtpdec
1643     rtpenc_chain
1644     rv34dsp
1645     sinewin
1646     snappy
1647     startcode
1648     texturedsp
1649     texturedspenc
1650     tpeldsp
1651     videodsp
1652     vp3dsp
1653     vp56dsp
1654     vp8dsp
1655     wma_freqs
1656     wmv2dsp
1657 "
1658
1659 CMDLINE_SELECT="
1660     $ARCH_EXT_LIST
1661     $CONFIG_LIST
1662     $HAVE_LIST_CMDLINE
1663     $THREADS_LIST
1664     asm
1665     cross_compile
1666     debug
1667     extra_warnings
1668     logging
1669     lto
1670     optimizations
1671     rpath
1672 "
1673
1674 PATHS_LIST="
1675     bindir
1676     datadir
1677     docdir
1678     incdir
1679     libdir
1680     mandir
1681     prefix
1682     shlibdir
1683 "
1684
1685 CMDLINE_SET="
1686     $PATHS_LIST
1687     ar
1688     arch
1689     as
1690     build_suffix
1691     cc
1692     cpu
1693     cross_prefix
1694     dep_cc
1695     env
1696     extra_version
1697     host_cc
1698     host_cflags
1699     host_ld
1700     host_ldflags
1701     host_libs
1702     host_os
1703     ld
1704     logfile
1705     malloc_prefix
1706     nm
1707     optflags
1708     pkg_config
1709     pkg_config_flags
1710     random_seed
1711     samples
1712     sysinclude
1713     sysroot
1714     target_exec
1715     target_os
1716     target_path
1717     target_samples
1718     toolchain
1719 "
1720
1721 CMDLINE_APPEND="
1722     extra_cflags
1723     host_cppflags
1724 "
1725
1726 # code dependency declarations
1727
1728 # architecture extensions
1729
1730 armv5te_deps="arm"
1731 armv6_deps="arm"
1732 armv6t2_deps="arm"
1733 armv8_deps="aarch64"
1734 neon_deps_any="aarch64 arm"
1735 intrinsics_neon_deps="neon"
1736 vfp_deps_any="aarch64 arm"
1737 vfpv3_deps="vfp"
1738
1739 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1740
1741 altivec_deps="ppc"
1742 ppc4xx_deps="ppc"
1743 vsx_deps="altivec"
1744 power8_deps="vsx"
1745
1746 cpunop_deps="i686"
1747 x86_64_select="i686"
1748 x86_64_suggest="fast_cmov"
1749
1750 amd3dnow_deps="mmx"
1751 amd3dnowext_deps="amd3dnow"
1752 i686_deps="x86"
1753 mmx_deps="x86"
1754 mmxext_deps="mmx"
1755 sse_deps="mmxext"
1756 sse2_deps="sse"
1757 sse3_deps="sse2"
1758 ssse3_deps="sse3"
1759 sse4_deps="ssse3"
1760 sse42_deps="sse4"
1761 avx_deps="sse42"
1762 xop_deps="avx"
1763 fma3_deps="avx"
1764 fma4_deps="avx"
1765 avx2_deps="avx"
1766
1767 mmx_external_deps="yasm"
1768 mmx_inline_deps="inline_asm"
1769 mmx_suggest="mmx_external mmx_inline"
1770
1771 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1772     eval dep=\$${ext}_deps
1773     eval ${ext}_external_deps='"${dep}_external"'
1774     eval ${ext}_inline_deps='"${dep}_inline"'
1775     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1776 done
1777
1778 aligned_stack_if_any="aarch64 ppc x86"
1779 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1780 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1781 fast_unaligned_if_any="aarch64 ppc x86"
1782 simd_align_16_if_any="altivec neon sse"
1783
1784 # system capabilities
1785 symver_if_any="symver_asm_label symver_gnu_asm"
1786 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
1787
1788 # threading support
1789 atomics_gcc_if="sync_val_compare_and_swap"
1790 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1791 atomics_win32_if="MemoryBarrier"
1792 atomics_native_if_any="$ATOMICS_LIST"
1793 w32threads_deps="atomics_native"
1794 threads_if_any="$THREADS_LIST"
1795
1796 # subsystems
1797 dct_select="rdft"
1798 error_resilience_select="me_cmp"
1799 faandct_deps="faan fdctdsp"
1800 faanidct_deps="faan idctdsp"
1801 intrax8_select="error_resilience"
1802 mdct_select="fft"
1803 rdft_select="fft"
1804 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1805 mpeg_er_select="error_resilience"
1806 mpegaudio_select="mpegaudiodsp"
1807 mpegaudiodsp_select="dct"
1808 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp videodsp"
1809 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1810 nvenc_deps_any="dlopen LoadLibrary"
1811 nvenc_extralibs='$ldl'
1812 qsvdec_select="qsv"
1813 qsvenc_select="qsv"
1814
1815 # decoders / encoders
1816 aac_decoder_select="imdct15 mdct sinewin"
1817 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1818 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1819 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1820 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1821 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1822 adpcm_g722_decoder_select="g722dsp"
1823 adpcm_g722_encoder_select="g722dsp"
1824 aic_decoder_select="golomb idctdsp"
1825 alac_encoder_select="lpc"
1826 als_decoder_select="bswapdsp"
1827 amrnb_decoder_select="lsp"
1828 amrwb_decoder_select="lsp"
1829 amv_decoder_select="sp5x_decoder"
1830 ape_decoder_select="bswapdsp"
1831 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1832 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1833 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1834 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1835 atrac1_decoder_select="mdct sinewin"
1836 atrac3_decoder_select="mdct"
1837 atrac3p_decoder_select="mdct sinewin"
1838 bink_decoder_select="blockdsp hpeldsp"
1839 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1840 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1841 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1842 cllc_decoder_select="bswapdsp"
1843 comfortnoise_encoder_select="lpc"
1844 cook_decoder_select="audiodsp mdct sinewin"
1845 cscd_decoder_select="lzo"
1846 cscd_decoder_suggest="zlib"
1847 dca_decoder_select="fmtconvert mdct"
1848 dds_decoder_select="texturedsp"
1849 dnxhd_decoder_select="blockdsp idctdsp"
1850 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1851 dvvideo_decoder_select="dvprofile idctdsp"
1852 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1853 dxa_decoder_deps="zlib"
1854 dxv_decoder_select="lzf texturedsp"
1855 eac3_decoder_select="ac3_decoder"
1856 eac3_encoder_select="ac3_encoder"
1857 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1858 eatgq_decoder_select="aandcttables idctdsp"
1859 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpeg1video_decoder"
1860 exr_decoder_deps="zlib"
1861 ffv1_decoder_select="golomb rangecoder"
1862 ffv1_encoder_select="rangecoder"
1863 ffvhuff_decoder_select="huffyuv_decoder"
1864 ffvhuff_encoder_select="huffyuv_encoder"
1865 fic_decoder_select="golomb"
1866 flac_decoder_select="flacdsp golomb"
1867 flac_encoder_select="bswapdsp flacdsp golomb lpc"
1868 flashsv_decoder_deps="zlib"
1869 flashsv_encoder_deps="zlib"
1870 flashsv2_decoder_deps="zlib"
1871 flv_decoder_select="h263_decoder"
1872 flv_encoder_select="h263_encoder"
1873 fourxm_decoder_select="blockdsp bswapdsp"
1874 fraps_decoder_select="bswapdsp huffman"
1875 g2m_decoder_deps="zlib"
1876 g2m_decoder_select="blockdsp idctdsp jpegtables"
1877 h261_decoder_select="mpeg_er mpegvideo"
1878 h261_encoder_select="aandcttables mpegvideoenc"
1879 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
1880 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1881 h263i_decoder_select="h263_decoder"
1882 h263p_encoder_select="h263_encoder"
1883 h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel startcode videodsp"
1884 h264_decoder_suggest="error_resilience"
1885 h264_nvenc_encoder_deps="nvenc"
1886 h264_qsv_decoder_deps="libmfx"
1887 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
1888 h264_qsv_encoder_deps="libmfx"
1889 h264_qsv_encoder_select="qsvenc"
1890 hap_decoder_select="snappy texturedsp"
1891 hap_encoder_deps="libsnappy"
1892 hap_encoder_select="texturedspenc"
1893 hevc_decoder_select="bswapdsp cabac golomb videodsp"
1894 hevc_nvenc_encoder_deps="nvenc"
1895 hevc_qsv_encoder_deps="libmfx"
1896 hevc_qsv_decoder_deps="libmfx"
1897 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser qsvdec hevc_qsv_hwaccel"
1898 hevc_qsv_encoder_select="qsvenc"
1899 huffyuv_decoder_select="bswapdsp huffyuvdsp"
1900 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
1901 iac_decoder_select="imc_decoder"
1902 imc_decoder_select="bswapdsp fft mdct sinewin"
1903 indeo3_decoder_select="hpeldsp"
1904 indeo4_decoder_select="ividsp"
1905 indeo5_decoder_select="ividsp"
1906 interplay_video_decoder_select="hpeldsp"
1907 jpegls_decoder_select="golomb mjpeg_decoder"
1908 jpegls_encoder_select="golomb"
1909 jv_decoder_select="blockdsp"
1910 lagarith_decoder_select="huffyuvdsp"
1911 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
1912 loco_decoder_select="golomb"
1913 mdec_decoder_select="blockdsp idctdsp mpegvideo"
1914 metasound_decoder_select="lsp mdct sinewin"
1915 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
1916 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
1917 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
1918 mjpegb_decoder_select="mjpeg_decoder"
1919 mlp_decoder_select="mlp_parser"
1920 motionpixels_decoder_select="bswapdsp"
1921 mp1_decoder_select="mpegaudio"
1922 mp1float_decoder_select="mpegaudio"
1923 mp2_decoder_select="mpegaudio"
1924 mp2float_decoder_select="mpegaudio"
1925 mp3_decoder_select="mpegaudio"
1926 mp3adu_decoder_select="mpegaudio"
1927 mp3adufloat_decoder_select="mpegaudio"
1928 mp3float_decoder_select="mpegaudio"
1929 mp3on4_decoder_select="mpegaudio"
1930 mp3on4float_decoder_select="mpegaudio"
1931 mpc7_decoder_select="bswapdsp mpegaudiodsp"
1932 mpc8_decoder_select="mpegaudiodsp"
1933 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
1934 mpeg_xvmc_decoder_select="mpeg2video_decoder"
1935 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
1936 mpeg1video_encoder_select="aandcttables mpegvideoenc"
1937 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
1938 mpeg2video_encoder_select="aandcttables mpegvideoenc"
1939 mpeg2_qsv_decoder_deps="libmfx"
1940 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
1941 mpeg2_qsv_encoder_deps="libmfx"
1942 mpeg2_qsv_encoder_select="qsvenc"
1943 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
1944 mpeg4_encoder_select="h263_encoder"
1945 msa1_decoder_select="mss34dsp"
1946 msmpeg4v1_decoder_select="h263_decoder"
1947 msmpeg4v2_decoder_select="h263_decoder"
1948 msmpeg4v2_encoder_select="h263_encoder"
1949 msmpeg4v3_decoder_select="h263_decoder"
1950 msmpeg4v3_encoder_select="h263_encoder"
1951 mss2_decoder_select="error_resilience mpeg_er qpeldsp vc1_decoder"
1952 mts2_decoder_select="mss34dsp"
1953 mxpeg_decoder_select="mjpeg_decoder"
1954 nellymoser_decoder_select="mdct sinewin"
1955 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
1956 nuv_decoder_select="idctdsp lzo"
1957 on2avc_decoder_select="mdct"
1958 opus_decoder_deps="avresample"
1959 opus_decoder_select="imdct15"
1960 png_decoder_deps="zlib"
1961 png_encoder_deps="zlib"
1962 png_encoder_select="huffyuvencdsp"
1963 prores_decoder_select="idctdsp"
1964 prores_encoder_select="fdctdsp"
1965 qcelp_decoder_select="lsp"
1966 qdm2_decoder_select="mdct rdft mpegaudiodsp"
1967 ra_144_encoder_select="audio_frame_queue lpc"
1968 ralf_decoder_select="golomb"
1969 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
1970 rv10_encoder_select="h263_encoder"
1971 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
1972 rv20_encoder_select="h263_encoder"
1973 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
1974 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
1975 shorten_decoder_select="golomb"
1976 sipr_decoder_select="lsp"
1977 sp5x_decoder_select="mjpeg_decoder"
1978 svq1_decoder_select="hpeldsp"
1979 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
1980 svq3_decoder_select="h264_decoder hpeldsp tpeldsp"
1981 svq3_decoder_suggest="zlib"
1982 tak_decoder_select="audiodsp"
1983 tdsc_decoder_deps="zlib"
1984 tdsc_decoder_select="mjpeg_decoder"
1985 theora_decoder_select="vp3_decoder"
1986 thp_decoder_select="mjpeg_decoder"
1987 tiff_decoder_suggest="zlib"
1988 tiff_encoder_suggest="zlib"
1989 truehd_decoder_select="mlp_decoder"
1990 truemotion2_decoder_select="bswapdsp"
1991 truespeech_decoder_select="bswapdsp"
1992 tscc_decoder_deps="zlib"
1993 txd_decoder_select="texturedsp"
1994 twinvq_decoder_select="mdct lsp sinewin"
1995 utvideo_decoder_select="bswapdsp"
1996 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
1997 vble_decoder_select="huffyuvdsp"
1998 vc1_decoder_select="blockdsp error_resilience h263_decoder h264chroma h264qpel intrax8 mpeg_er qpeldsp startcode"
1999 vc1image_decoder_select="vc1_decoder"
2000 vorbis_decoder_select="mdct"
2001 vorbis_encoder_select="mdct"
2002 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2003 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2004 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2005 vp6a_decoder_select="vp6_decoder"
2006 vp6f_decoder_select="vp6_decoder"
2007 vp7_decoder_select="h264pred videodsp vp8dsp"
2008 vp8_decoder_select="h264pred videodsp vp8dsp"
2009 vp9_decoder_select="videodsp"
2010 webp_decoder_select="vp8_decoder"
2011 wmapro_decoder_select="mdct sinewin wma_freqs"
2012 wmav1_decoder_select="mdct sinewin wma_freqs"
2013 wmav1_encoder_select="mdct sinewin wma_freqs"
2014 wmav2_decoder_select="mdct sinewin wma_freqs"
2015 wmav2_encoder_select="mdct sinewin wma_freqs"
2016 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2017 wmv1_decoder_select="h263_decoder"
2018 wmv1_encoder_select="h263_encoder"
2019 wmv2_decoder_select="blockdsp h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2020 wmv2_encoder_select="h263_encoder wmv2dsp"
2021 wmv3_decoder_select="vc1_decoder"
2022 wmv3image_decoder_select="wmv3_decoder"
2023 zerocodec_decoder_deps="zlib"
2024 zlib_decoder_deps="zlib"
2025 zlib_encoder_deps="zlib"
2026 zmbv_decoder_deps="zlib"
2027 zmbv_encoder_deps="zlib"
2028
2029 # hardware accelerators
2030 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2031 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2032 vaapi_deps="va_va_h"
2033 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2034 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2035 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2036
2037 h263_vaapi_hwaccel_deps="vaapi"
2038 h263_vaapi_hwaccel_select="h263_decoder"
2039 h263_vdpau_hwaccel_deps="vdpau"
2040 h263_vdpau_hwaccel_select="h263_decoder"
2041 h264_d3d11va_hwaccel_deps="d3d11va"
2042 h264_d3d11va_hwaccel_select="h264_decoder"
2043 h264_dxva2_hwaccel_deps="dxva2"
2044 h264_dxva2_hwaccel_select="h264_decoder"
2045 h264_mmal_decoder_deps="mmal"
2046 h264_mmal_hwaccel_deps="mmal"
2047 h264_mmal_decoder_select="h264_decoder"
2048 h264_mmal_encoder_deps="mmal"
2049 h264_qsv_hwaccel_deps="libmfx"
2050 h264_vaapi_hwaccel_deps="vaapi"
2051 h264_vaapi_hwaccel_select="h264_decoder"
2052 h264_vda_hwaccel_deps="vda"
2053 h264_vda_hwaccel_select="h264_decoder"
2054 h264_vda_old_hwaccel_deps="vda"
2055 h264_vda_old_hwaccel_select="h264_decoder"
2056 h264_vdpau_hwaccel_deps="vdpau"
2057 h264_vdpau_hwaccel_select="h264_decoder"
2058 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2059 hevc_d3d11va_hwaccel_select="hevc_decoder"
2060 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2061 hevc_dxva2_hwaccel_select="hevc_decoder"
2062 hevc_qsv_hwaccel_deps="libmfx"
2063 mpeg1_vdpau_hwaccel_deps="vdpau"
2064 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2065 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2066 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2067 mpeg2_dxva2_hwaccel_deps="dxva2"
2068 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2069 mpeg2_qsv_hwaccel_deps="libmfx"
2070 mpeg2_vaapi_hwaccel_deps="vaapi"
2071 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2072 mpeg2_vdpau_hwaccel_deps="vdpau"
2073 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2074 mpeg4_vaapi_hwaccel_deps="vaapi"
2075 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2076 mpeg4_vdpau_hwaccel_deps="vdpau"
2077 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2078 vc1_d3d11va_hwaccel_deps="d3d11va"
2079 vc1_d3d11va_hwaccel_select="vc1_decoder"
2080 vc1_dxva2_hwaccel_deps="dxva2"
2081 vc1_dxva2_hwaccel_select="vc1_decoder"
2082 vc1_vaapi_hwaccel_deps="vaapi"
2083 vc1_vaapi_hwaccel_select="vc1_decoder"
2084 vc1_vdpau_hwaccel_deps="vdpau"
2085 vc1_vdpau_hwaccel_select="vc1_decoder"
2086 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2087 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2088 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2089 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2090
2091 # parsers
2092 h264_parser_select="h264_decoder"
2093 hevc_parser_select="golomb"
2094 mpegvideo_parser_select="mpegvideo"
2095 mpeg4video_parser_select="error_resilience h263dsp mpeg_er mpegvideo qpeldsp"
2096 vc1_parser_select="mpegvideo startcode vc1_decoder"
2097
2098 # bitstream_filters
2099 mjpeg2jpeg_bsf_select="jpegtables"
2100
2101 # external libraries
2102 libdcadec_decoder_deps="libdcadec"
2103 libfaac_encoder_deps="libfaac"
2104 libfaac_encoder_select="audio_frame_queue"
2105 libfdk_aac_decoder_deps="libfdk_aac"
2106 libfdk_aac_encoder_deps="libfdk_aac"
2107 libfdk_aac_encoder_select="audio_frame_queue"
2108 libgsm_decoder_deps="libgsm"
2109 libgsm_encoder_deps="libgsm"
2110 libgsm_ms_decoder_deps="libgsm"
2111 libgsm_ms_encoder_deps="libgsm"
2112 libilbc_decoder_deps="libilbc"
2113 libilbc_encoder_deps="libilbc"
2114 libmp3lame_encoder_deps="libmp3lame"
2115 libmp3lame_encoder_select="audio_frame_queue"
2116 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2117 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2118 libopencore_amrnb_encoder_select="audio_frame_queue"
2119 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2120 libopenh264_encoder_deps="libopenh264"
2121 libopenjpeg_decoder_deps="libopenjpeg"
2122 libopenjpeg_encoder_deps="libopenjpeg"
2123 libopus_decoder_deps="libopus"
2124 libopus_encoder_deps="libopus"
2125 libopus_encoder_select="audio_frame_queue"
2126 libschroedinger_decoder_deps="libschroedinger"
2127 libschroedinger_encoder_deps="libschroedinger"
2128 libspeex_decoder_deps="libspeex"
2129 libspeex_encoder_deps="libspeex"
2130 libspeex_encoder_select="audio_frame_queue"
2131 libtheora_encoder_deps="libtheora"
2132 libtwolame_encoder_deps="libtwolame"
2133 libvo_aacenc_encoder_deps="libvo_aacenc"
2134 libvo_aacenc_encoder_select="audio_frame_queue"
2135 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2136 libvorbis_encoder_deps="libvorbis"
2137 libvorbis_encoder_select="audio_frame_queue"
2138 libvpx_vp8_decoder_deps="libvpx"
2139 libvpx_vp8_encoder_deps="libvpx"
2140 libvpx_vp9_decoder_deps="libvpx"
2141 libvpx_vp9_encoder_deps="libvpx"
2142 libwavpack_encoder_deps="libwavpack"
2143 libwebp_encoder_deps="libwebp"
2144 libx262_encoder_deps="libx262"
2145 libx264_encoder_deps="libx264"
2146 libx265_encoder_deps="libx265"
2147 libxavs_encoder_deps="libxavs"
2148 libxvid_encoder_deps="libxvid"
2149
2150 # demuxers / muxers
2151 ac3_demuxer_select="ac3_parser"
2152 asf_demuxer_select="riffdec"
2153 asf_muxer_select="riffenc"
2154 asf_stream_muxer_select="asf_muxer"
2155 avi_demuxer_select="riffdec"
2156 avi_muxer_select="riffenc"
2157 avisynth_demuxer_deps="avisynth"
2158 avisynth_demuxer_select="riffdec"
2159 caf_demuxer_select="riffdec"
2160 dash_muxer_select="mp4_muxer"
2161 dirac_demuxer_select="dirac_parser"
2162 dv_demuxer_select="dvprofile"
2163 dv_muxer_select="dvprofile"
2164 dxa_demuxer_select="riffdec"
2165 eac3_demuxer_select="ac3_parser"
2166 f4v_muxer_select="mov_muxer"
2167 flac_demuxer_select="flac_parser"
2168 hds_muxer_select="flv_muxer"
2169 hls_muxer_select="mpegts_muxer"
2170 ipod_muxer_select="mov_muxer"
2171 ismv_muxer_select="mov_muxer"
2172 matroska_audio_muxer_select="matroska_muxer"
2173 matroska_demuxer_select="riffdec"
2174 matroska_demuxer_suggest="bzlib lzo zlib"
2175 matroska_muxer_select="riffenc"
2176 mmf_muxer_select="riffenc"
2177 mov_demuxer_select="riffdec"
2178 mov_demuxer_suggest="zlib"
2179 mov_muxer_select="riffenc rtpenc_chain"
2180 mp3_demuxer_select="mpegaudio_parser"
2181 mp4_muxer_select="mov_muxer"
2182 mpegts_muxer_select="adts_muxer latm_muxer"
2183 mpegtsraw_demuxer_select="mpegts_demuxer"
2184 mxf_d10_muxer_select="mxf_muxer"
2185 nut_muxer_select="riffenc"
2186 nuv_demuxer_select="riffdec"
2187 oga_muxer_select="ogg_muxer"
2188 ogg_demuxer_select="golomb"
2189 opus_muxer_select="ogg_muxer"
2190 psp_muxer_select="mov_muxer"
2191 rtp_demuxer_select="sdp_demuxer"
2192 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol"
2193 rtsp_demuxer_select="http_protocol rtpdec"
2194 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2195 sap_demuxer_select="sdp_demuxer"
2196 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2197 sdp_demuxer_select="rtpdec"
2198 smoothstreaming_muxer_select="ismv_muxer"
2199 spdif_muxer_select="aac_parser"
2200 spx_muxer_select="ogg_muxer"
2201 tak_demuxer_select="tak_parser"
2202 tg2_muxer_select="mov_muxer"
2203 tgp_muxer_select="mov_muxer"
2204 w64_demuxer_select="wav_demuxer"
2205 wav_demuxer_select="riffdec"
2206 wav_muxer_select="riffenc"
2207 webm_muxer_select="riffenc"
2208 webm_muxer_suggest="libopus_encoder libvorbis_encoder libvpx_vp8_encoder libvpx_vp9_encoder"
2209 wtv_demuxer_select="riffdec"
2210 xmv_demuxer_select="riffdec"
2211 xwma_demuxer_select="riffdec"
2212
2213 # indevs / outdevs
2214 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2215 alsa_outdev_deps="alsa_asoundlib_h"
2216 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2217 dv1394_indev_deps="dv1394"
2218 dv1394_indev_select="dv_demuxer"
2219 fbdev_indev_deps="linux_fb_h"
2220 jack_indev_deps="jack_jack_h pthreads"
2221 libcdio_indev_deps="libcdio"
2222 libdc1394_indev_deps="libdc1394"
2223 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2224 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2225 pulse_indev_deps="libpulse"
2226 sndio_indev_deps="sndio_h"
2227 sndio_outdev_deps="sndio_h"
2228 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2229 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2230 vfwcap_indev_extralibs="-lavicap32"
2231 x11grab_indev_deps="x11grab"
2232 x11grab_xcb_indev_deps="libxcb"
2233
2234 # protocols
2235 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2236 ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
2237 ffrtmpcrypt_protocol_select="tcp_protocol"
2238 ffrtmphttp_protocol_deps="!librtmp_protocol"
2239 ffrtmphttp_protocol_select="http_protocol"
2240 gopher_protocol_select="network"
2241 http_protocol_select="tcp_protocol"
2242 httpproxy_protocol_select="tcp_protocol"
2243 https_protocol_select="tls_protocol"
2244 icecast_protocol_select="http_protocol"
2245 librtmp_protocol_deps="librtmp"
2246 librtmpe_protocol_deps="librtmp"
2247 librtmps_protocol_deps="librtmp"
2248 librtmpt_protocol_deps="librtmp"
2249 librtmpte_protocol_deps="librtmp"
2250 mmsh_protocol_select="http_protocol"
2251 mmst_protocol_select="network"
2252 rtmp_protocol_deps="!librtmp_protocol"
2253 rtmp_protocol_select="tcp_protocol"
2254 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2255 rtmps_protocol_deps="!librtmp_protocol"
2256 rtmps_protocol_select="tls_protocol"
2257 rtmpt_protocol_select="ffrtmphttp_protocol"
2258 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2259 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2260 rtp_protocol_select="udp_protocol"
2261 sctp_protocol_deps="struct_sctp_event_subscribe"
2262 sctp_protocol_select="network"
2263 srtp_protocol_select="rtp_protocol"
2264 tcp_protocol_select="network"
2265 tls_gnutls_protocol_deps="gnutls"
2266 tls_gnutls_protocol_select="tcp_protocol"
2267 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
2268 tls_openssl_protocol_select="tcp_protocol"
2269 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2270 udp_protocol_select="network"
2271 unix_protocol_deps="sys_un_h"
2272 unix_protocol_select="network"
2273
2274 # filters
2275 blackframe_filter_deps="gpl"
2276 boxblur_filter_deps="gpl"
2277 bs2b_filter_deps="libbs2b"
2278 cropdetect_filter_deps="gpl"
2279 delogo_filter_deps="gpl"
2280 drawtext_filter_deps="libfreetype"
2281 frei0r_filter_deps="frei0r dlopen"
2282 frei0r_filter_extralibs='$ldl'
2283 frei0r_src_filter_deps="frei0r dlopen"
2284 frei0r_src_filter_extralibs='$ldl'
2285 hqdn3d_filter_deps="gpl"
2286 interlace_filter_deps="gpl"
2287 ocv_filter_deps="libopencv"
2288 resample_filter_deps="avresample"
2289 scale_filter_deps="swscale"
2290
2291 # examples
2292 avcodec_example_deps="avcodec avutil"
2293 filter_audio_example_deps="avfilter avutil"
2294 metadata_example_deps="avformat avutil"
2295 output_example_deps="avcodec avformat avutil swscale"
2296 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder vaapi_x11"
2297 transcode_aac_example_deps="avcodec avformat avresample"
2298
2299 # libraries, in linking order
2300 avcodec_deps="avutil"
2301 avdevice_deps="avformat avcodec avutil"
2302 avfilter_deps="avutil"
2303 avformat_deps="avcodec avutil"
2304 avresample_deps="avutil"
2305 swscale_deps="avutil"
2306
2307 # programs
2308 avconv_deps="avcodec avfilter avformat avresample swscale"
2309 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2310                fps_filter null_filter resample_filter scale_filter
2311                setpts_filter trim_filter"
2312 avplay_deps="avcodec avformat avresample swscale sdl"
2313 avplay_libs='$sdl_libs'
2314 avplay_select="rdft transpose_filter hflip_filter vflip_filter"
2315 avprobe_deps="avcodec avformat"
2316
2317 # documentation
2318 pod2man_deps="doc"
2319 texi2html_deps="doc"
2320
2321 # default parameters
2322
2323 logfile="config.log"
2324
2325 # installation paths
2326 prefix_default="/usr/local"
2327 bindir_default='${prefix}/bin'
2328 datadir_default='${prefix}/share/avconv'
2329 docdir_default='${prefix}/share/doc/libav'
2330 incdir_default='${prefix}/include'
2331 libdir_default='${prefix}/lib'
2332 mandir_default='${prefix}/share/man'
2333 shlibdir_default="$libdir_default"
2334
2335 # toolchain
2336 ar_default="ar"
2337 cc_default="gcc"
2338 host_cc_default="gcc"
2339 cp_f="cp -f"
2340 ln_s="ln -s -f"
2341 nm_default="nm -g"
2342 objformat="elf"
2343 pkg_config_default=pkg-config
2344 ranlib="ranlib"
2345 strip="strip"
2346 yasmexe="yasm"
2347
2348 # machine
2349 arch_default=$(uname -m)
2350 cpu="generic"
2351 intrinsics="none"
2352
2353 # OS
2354 target_os_default=$(tolower $(uname -s))
2355 host_os=$target_os_default
2356
2357 # configurable options
2358 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2359
2360 enable asm
2361 enable debug
2362 enable doc
2363 enable faan faandct faanidct
2364 enable optimizations
2365 enable safe_bitstream_reader
2366 enable static
2367 enable swscale_alpha
2368 enable valgrind_backtrace
2369
2370 # By default, enable only those hwaccels that have no external dependencies.
2371 enable d3d11va dxva2 vda vdpau
2372
2373 # build settings
2374 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2375 LIBPREF="lib"
2376 LIBSUF=".a"
2377 FULLNAME='$(NAME)$(BUILDSUF)'
2378 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2379 SLIBPREF="lib"
2380 SLIBSUF=".so"
2381 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2382 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2383 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2384 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2385 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2386 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2387
2388 asflags_filter=echo
2389 cflags_filter=echo
2390 ldflags_filter=echo
2391
2392 AS_C='-c'
2393 AS_O='-o $@'
2394 CC_C='-c'
2395 CC_E='-E -o $@'
2396 CC_O='-o $@'
2397 LD_O='-o $@'
2398 LD_LIB='-l%'
2399 LD_PATH='-L'
2400 HOSTCC_C='-c'
2401 HOSTCC_E='-E -o $@'
2402 HOSTCC_O='-o $@'
2403 HOSTLD_O='-o $@'
2404
2405 host_libs='-lm'
2406 host_cflags_filter=echo
2407 host_ldflags_filter=echo
2408
2409 target_path='$(CURDIR)'
2410
2411 # since the object filename is not given with the -MM flag, the compiler
2412 # is only able to print the basename, and we must add the path ourselves
2413 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2414 DEPFLAGS='-MM'
2415
2416 # find source path
2417 if test -f configure; then
2418     source_path=.
2419 else
2420     source_path=$(cd $(dirname "$0"); pwd)
2421     echo "$source_path" | grep -q '[[:blank:]]' &&
2422         die "Out of tree builds are impossible with whitespace in source path."
2423     test -e "$source_path/config.h" &&
2424         die "Out of tree builds are impossible with config.h in source dir."
2425 fi
2426
2427 for v in "$@"; do
2428     r=${v#*=}
2429     l=${v%"$r"}
2430     r=$(sh_quote "$r")
2431     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2432 done
2433
2434 find_things(){
2435     thing=$1
2436     pattern=$2
2437     file=$source_path/$3
2438     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2439 }
2440
2441 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2442 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2443 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2444 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2445 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2446 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2447 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2448 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2449 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2450 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2451 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2452
2453 ALL_COMPONENTS="
2454     $BSF_LIST
2455     $DECODER_LIST
2456     $DEMUXER_LIST
2457     $ENCODER_LIST
2458     $FILTER_LIST
2459     $HWACCEL_LIST
2460     $INDEV_LIST
2461     $MUXER_LIST
2462     $OUTDEV_LIST
2463     $PARSER_LIST
2464     $PROTOCOL_LIST
2465 "
2466
2467 for n in $COMPONENT_LIST; do
2468     v=$(toupper ${n%s})_LIST
2469     eval enable \$$v
2470     eval ${n}_if_any="\$$v"
2471 done
2472
2473 enable $ARCH_EXT_LIST
2474
2475 die_unknown(){
2476     echo "Unknown option \"$1\"."
2477     echo "See $0 --help for available options."
2478     exit 1
2479 }
2480
2481 print_3_columns() {
2482     cat | tr ' ' '\n' | sort | pr -r -3 -t
2483 }
2484
2485 show_list() {
2486     suffix=_$1
2487     shift
2488     echo $* | sed s/$suffix//g | print_3_columns
2489     exit 0
2490 }
2491
2492 rand_list(){
2493     IFS=', '
2494     set -- $*
2495     unset IFS
2496     for thing; do
2497         comp=${thing%:*}
2498         prob=${thing#$comp}
2499         prob=${prob#:}
2500         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2501         echo "prob ${prob:-0.5}"
2502         printf '%s\n' $comp
2503     done
2504 }
2505
2506 do_random(){
2507     action=$1
2508     shift
2509     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2510     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2511 }
2512
2513 for opt do
2514     optval="${opt#*=}"
2515     case "$opt" in
2516         --extra-ldflags=*)
2517             add_ldflags $optval
2518         ;;
2519         --extra-ldexeflags=*)
2520             add_ldexeflags $optval
2521         ;;
2522         --extra-libs=*)
2523             add_extralibs $optval
2524         ;;
2525         --disable-devices)
2526             disable $INDEV_LIST $OUTDEV_LIST
2527         ;;
2528         --enable-debug=*)
2529             debuglevel="$optval"
2530         ;;
2531         --disable-programs)
2532             disable $PROGRAM_LIST
2533         ;;
2534         --disable-everything)
2535             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2536         ;;
2537         --disable-all)
2538             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2539             disable $LIBRARY_LIST $PROGRAM_LIST doc
2540         ;;
2541         --enable-random|--disable-random)
2542             action=${opt%%-random}
2543             do_random ${action#--} $COMPONENT_LIST
2544         ;;
2545         --enable-random=*|--disable-random=*)
2546             action=${opt%%-random=*}
2547             do_random ${action#--} $optval
2548         ;;
2549         --enable-*=*|--disable-*=*)
2550             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2551             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2552             eval list=\$$(toupper $thing)_LIST
2553             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2554             $action $(filter "$name" $list)
2555         ;;
2556         --enable-avserver|--disable-avserver*)
2557             warn "avserver has been removed, the ${opt} option is only"\
2558                  "provided for compatibility and will be removed in the future"
2559         ;;
2560         --enable-?*|--disable-?*)
2561             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2562             if is_in $option $COMPONENT_LIST; then
2563                 test $action = disable && action=unset
2564                 eval $action \$$(toupper ${option%s})_LIST
2565             elif is_in $option $CMDLINE_SELECT; then
2566                 $action $option
2567             else
2568                 die_unknown $opt
2569             fi
2570         ;;
2571         --list-*)
2572             NAME="${opt#--list-}"
2573             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2574             NAME=${NAME%s}
2575             eval show_list $NAME \$$(toupper $NAME)_LIST
2576         ;;
2577         --help|-h) show_help
2578         ;;
2579         *)
2580             optname="${opt%%=*}"
2581             optname="${optname#--}"
2582             optname=$(echo "$optname" | sed 's/-/_/g')
2583             if is_in $optname $CMDLINE_SET; then
2584                 eval $optname='$optval'
2585             elif is_in $optname $CMDLINE_APPEND; then
2586                 append $optname "$optval"
2587             else
2588                 die_unknown $opt
2589             fi
2590         ;;
2591     esac
2592 done
2593
2594 for e in $env; do
2595     eval "export $e"
2596 done
2597
2598 disabled logging && logfile=/dev/null
2599
2600 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2601 set >> $logfile
2602
2603 case "$toolchain" in
2604     clang-asan)
2605         cc_default="clang"
2606         add_cflags  -fsanitize=address
2607         add_ldflags -fsanitize=address
2608     ;;
2609     clang-tsan)
2610         cc_default="clang"
2611         add_cflags  -fsanitize=thread -pie
2612         add_ldflags -fsanitize=thread -pie
2613     ;;
2614     clang-usan)
2615         cc_default="clang"
2616         add_cflags  -fsanitize=undefined -O1
2617         add_ldflags -fsanitize=undefined
2618     ;;
2619     gcc-asan)
2620         cc_default="gcc"
2621         add_cflags  -fsanitize=address
2622         add_ldflags -fsanitize=address
2623     ;;
2624     gcc-tsan)
2625         cc_default="gcc"
2626         add_cflags  -fsanitize=thread -pie -fPIC
2627         add_ldflags -fsanitize=thread -pie -fPIC
2628     ;;
2629     gcc-usan)
2630         cc_default="gcc"
2631         add_cflags  -fsanitize=undefined
2632         add_ldflags -fsanitize=undefined
2633     ;;
2634     valgrind-massif)
2635         target_exec_default="valgrind"
2636         target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2637     ;;
2638     valgrind-memcheck)
2639         target_exec_default="valgrind"
2640         target_exec_args="--track-origins=yes --leak-check=full"
2641     ;;
2642     msvc)
2643         # Check whether the current MSVC version needs the C99 converter.
2644         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2645         # support enough of C99 to build libav. Default to the new
2646         # behaviour if the regexp was unable to match anything, since this
2647         # successfully parses the version number of existing supported
2648         # versions that require the converter (MSVC 2010 and 2012).
2649         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2650         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2651             cc_default="cl"
2652         else
2653             cc_default="c99wrap cl"
2654         fi
2655         ld_default="$source_path/compat/windows/mslink"
2656         nm_default="dumpbin -symbols"
2657         ar_default="lib"
2658         case "$arch" in
2659         arm*)
2660             as_default="armasm"
2661             ;;
2662         esac
2663         target_os_default="win32"
2664         # Use a relative path for TMPDIR. This makes sure all the
2665         # ffconf temp files are written with a relative path, avoiding
2666         # issues with msys/win32 path conversion for MSVC parameters
2667         # such as -Fo<file> or -out:<file>.
2668         TMPDIR=.
2669     ;;
2670     icl)
2671         cc_default="icl"
2672         ld_default="xilink"
2673         nm_default="dumpbin -symbols"
2674         ar_default="xilib"
2675         target_os_default="win32"
2676         TMPDIR=.
2677     ;;
2678     gcov)
2679         add_cflags  -fprofile-arcs -ftest-coverage
2680         add_ldflags -fprofile-arcs -ftest-coverage
2681     ;;
2682     hardened)
2683         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2684         add_cflags   -fno-strict-overflow -fstack-protector-all
2685         add_ldflags  -Wl,-z,relro -Wl,-z,now
2686     ;;
2687     ?*)
2688         die "Unknown toolchain $toolchain"
2689     ;;
2690 esac
2691
2692 test -n "$cross_prefix" && enable cross_compile
2693
2694 if enabled cross_compile; then
2695     test -n "$arch" && test -n "$target_os" ||
2696         die "Must specify target arch and OS when cross-compiling"
2697 fi
2698
2699 ar_default="${cross_prefix}${ar_default}"
2700 cc_default="${cross_prefix}${cc_default}"
2701 nm_default="${cross_prefix}${nm_default}"
2702 pkg_config_default="${cross_prefix}${pkg_config_default}"
2703 ranlib="${cross_prefix}${ranlib}"
2704 strip="${cross_prefix}${strip}"
2705
2706 sysinclude_default="${sysroot}/usr/include"
2707
2708 set_default arch cc pkg_config sysinclude target_exec target_os
2709 enabled cross_compile || host_cc_default=$cc
2710 set_default host_cc
2711
2712 if ! $pkg_config --version >/dev/null 2>&1; then
2713     warn "$pkg_config not found, library detection may fail."
2714     pkg_config=false
2715 fi
2716
2717 exesuf() {
2718     case $1 in
2719         mingw32*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2720     esac
2721 }
2722
2723 EXESUF=$(exesuf $target_os)
2724 HOSTEXESUF=$(exesuf $host_os)
2725
2726 # set temporary file name
2727 : ${TMPDIR:=$TEMPDIR}
2728 : ${TMPDIR:=$TMP}
2729 : ${TMPDIR:=/tmp}
2730
2731 if ! check_cmd mktemp -u XXXXXX; then
2732     # simple replacement for missing mktemp
2733     # NOT SAFE FOR GENERAL USE
2734     mktemp(){
2735         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2736     }
2737 fi
2738
2739 tmpfile(){
2740     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2741         (set -C; exec > $tmp) 2>/dev/null ||
2742         die "Unable to create temporary file in $TMPDIR."
2743     append TMPFILES $tmp
2744     eval $1=$tmp
2745 }
2746
2747 trap 'rm -f -- $TMPFILES' EXIT
2748
2749 tmpfile TMPASM .asm
2750 tmpfile TMPC   .c
2751 tmpfile TMPE   $EXESUF
2752 tmpfile TMPH   .h
2753 tmpfile TMPO   .o
2754 tmpfile TMPS   .S
2755 tmpfile TMPSH  .sh
2756 tmpfile TMPV   .ver
2757
2758 unset -f mktemp
2759
2760 chmod +x $TMPE
2761
2762 # make sure we can execute files in $TMPDIR
2763 cat > $TMPSH 2>> $logfile <<EOF
2764 #! /bin/sh
2765 EOF
2766 chmod +x $TMPSH >> $logfile 2>&1
2767 if ! $TMPSH >> $logfile 2>&1; then
2768     cat <<EOF
2769 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2770 variable to another directory and make sure that it is not mounted noexec.
2771 EOF
2772     die "Sanity test failed."
2773 fi
2774
2775 armasm_flags(){
2776     for flag; do
2777         case $flag in
2778             # Filter out MSVC cl.exe options from cflags that shouldn't
2779             # be passed to gas-preprocessor
2780             -M[TD]*)                                            ;;
2781             *)                  echo $flag                      ;;
2782         esac
2783    done
2784 }
2785
2786 ccc_flags(){
2787     for flag; do
2788         case $flag in
2789             -std=c99)           echo -c99                       ;;
2790             -mcpu=*)            echo -arch ${flag#*=}           ;;
2791             -mieee)             echo -ieee                      ;;
2792             -O*|-fast)          echo $flag                      ;;
2793             -fno-math-errno)    echo -assume nomath_errno       ;;
2794             -g)                 echo -g3                        ;;
2795             -Wall)              echo -msg_enable level2         ;;
2796             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2797             -Wl,*)              echo $flag                      ;;
2798             -f*|-W*)                                            ;;
2799             *)                  echo $flag                      ;;
2800         esac
2801    done
2802 }
2803
2804 cparser_flags(){
2805     for flag; do
2806         case $flag in
2807             -Wno-switch)             echo -Wno-switch-enum ;;
2808             -Wno-format-zero-length) ;;
2809             -Wdisabled-optimization) ;;
2810             -Wno-pointer-sign)       echo -Wno-other ;;
2811             *)                       echo $flag ;;
2812         esac
2813     done
2814 }
2815
2816 msvc_common_flags(){
2817     for flag; do
2818         case $flag in
2819             # In addition to specifying certain flags under the compiler
2820             # specific filters, they must be specified here as well or else the
2821             # generic catch all at the bottom will print the original flag.
2822             -Wall)                ;;
2823             -std=c99)             ;;
2824             # Common flags
2825             -fomit-frame-pointer) ;;
2826             -g)                   echo -Z7 ;;
2827             -fno-math-errno)      ;;
2828             -fno-common)          ;;
2829             -fno-signed-zeros)    ;;
2830             -fPIC)                ;;
2831             -mthumb)              ;;
2832             -march=*)             ;;
2833             -lz)                  echo zlib.lib ;;
2834             -lavifil32)           echo vfw32.lib ;;
2835             -lavicap32)           echo vfw32.lib user32.lib ;;
2836             -l*)                  echo ${flag#-l}.lib ;;
2837             -L*)                  echo -libpath:${flag#-L} ;;
2838             *)                    echo $flag ;;
2839         esac
2840     done
2841 }
2842
2843 msvc_flags(){
2844     msvc_common_flags "$@"
2845     for flag; do
2846         case $flag in
2847             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
2848                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
2849                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
2850                                        -wd4273 -wd4554 -wd4701 ;;
2851         esac
2852     done
2853 }
2854
2855 icl_flags(){
2856     msvc_common_flags "$@"
2857     for flag; do
2858         case $flag in
2859             # Despite what Intel's documentation says -Wall, which is supported
2860             # on Windows, does enable remarks so disable them here.
2861             -Wall)                echo $flag -Qdiag-disable:remark ;;
2862             -std=c99)             echo -Qstd=c99 ;;
2863         esac
2864     done
2865 }
2866
2867 pgi_flags(){
2868     for flag; do
2869         case $flag in
2870             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
2871             -fomit-frame-pointer) echo -Mnoframe ;;
2872             -g)                   echo -gopt ;;
2873             *)                    echo $flag ;;
2874         esac
2875     done
2876 }
2877
2878 suncc_flags(){
2879     for flag; do
2880         case $flag in
2881             -march=*|-mcpu=*)
2882                 case "${flag#*=}" in
2883                     native)                   echo -xtarget=native       ;;
2884                     v9|niagara)               echo -xarch=sparc          ;;
2885                     ultrasparc)               echo -xarch=sparcvis       ;;
2886                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
2887                     i586|pentium)             echo -xchip=pentium        ;;
2888                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
2889                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
2890                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
2891                     pentium4*)          echo -xtarget=pentium4           ;;
2892                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
2893                     *-sse3)             echo -xarch=sse3                 ;;
2894                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
2895                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
2896                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
2897                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
2898                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
2899                     k8|opteron|athlon64|athlon-fx)
2900                                                echo -xarch=sse2a         ;;
2901                     athlon*)                   echo -xarch=pentium_proa  ;;
2902                 esac
2903                 ;;
2904             -std=c99)             echo -xc99              ;;
2905             -fomit-frame-pointer) echo -xregs=frameptr    ;;
2906             -fPIC)                echo -KPIC -xcode=pic32 ;;
2907             -W*,*)                echo $flag              ;;
2908             -f*-*|-W*|-mimpure-text)                      ;;
2909             -shared)              echo -G                 ;;
2910             *)                    echo $flag              ;;
2911         esac
2912     done
2913 }
2914
2915 tms470_flags(){
2916     for flag; do
2917         case $flag in
2918             -march=*|-mcpu=*)
2919                 case "${flag#*=}" in
2920                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
2921                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
2922                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
2923                     armv6*|arm11*)          echo -mv=6   ;;
2924                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
2925                                             echo -mv=5e  ;;
2926                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
2927                 esac
2928                 ;;
2929             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
2930             -mfpu=vfp)      echo --float_support=vfpv2        ;;
2931             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
2932             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
2933             -msoft-float)   echo --float_support=vfplib       ;;
2934             -O[0-3]|-mf=*)  echo $flag                        ;;
2935             -g)             echo -g -mn                       ;;
2936             -pds=*)         echo $flag                        ;;
2937             -D*|-I*)        echo $flag                        ;;
2938             --gcc|--abi=*)  echo $flag                        ;;
2939             -me)            echo $flag                        ;;
2940         esac
2941     done
2942 }
2943
2944 probe_cc(){
2945     pfx=$1
2946     _cc=$2
2947
2948     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
2949     unset _ld_o _ldflags _ld_lib _ld_path
2950     unset _depflags _DEPCMD _DEPFLAGS
2951     _flags_filter=echo
2952
2953     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
2954         _type=llvm_gcc
2955         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
2956         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
2957         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2958         _cflags_speed='-O3'
2959         _cflags_size='-Os'
2960     elif $_cc -v 2>&1 | grep -qi ^gcc; then
2961         _type=gcc
2962         gcc_version=$($_cc --version | head -n1)
2963         gcc_basever=$($_cc -dumpversion)
2964         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
2965         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
2966         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
2967         if ! $_cc -dumpversion | grep -q '^2\.'; then
2968             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2969         fi
2970         _cflags_speed='-O3'
2971         _cflags_size='-Os'
2972     elif $_cc --version 2>/dev/null | grep -q ^icc; then
2973         _type=icc
2974         _ident=$($_cc --version | head -n1)
2975         _depflags='-MMD'
2976         _cflags_speed='-O3'
2977         _cflags_size='-Os'
2978         _cflags_noopt='-O1'
2979     elif $_cc -v 2>&1 | grep -q xlc; then
2980         _type=xlc
2981         _ident=$($_cc -qversion 2>/dev/null | head -n1)
2982         _cflags_speed='-O5'
2983         _cflags_size='-O5 -qcompact'
2984     elif $_cc -V 2>/dev/null | grep -q Compaq; then
2985         _type=ccc
2986         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
2987         _DEPFLAGS='-M'
2988         _cflags_speed='-fast'
2989         _cflags_size='-O1'
2990         _flags_filter=ccc_flags
2991     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
2992         test -d "$sysroot" || die "No valid sysroot specified."
2993         _type=armcc
2994         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
2995         armcc_conf="$PWD/armcc.conf"
2996         $_cc --arm_linux_configure                 \
2997              --arm_linux_config_file="$armcc_conf" \
2998              --configure_sysroot="$sysroot"        \
2999              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3000              die "Error creating armcc configuration file."
3001         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3002         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3003         as_default="${cross_prefix}gcc"
3004         _depflags='-MMD'
3005         _cflags_speed='-O3'
3006         _cflags_size='-Os'
3007     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3008         _type=tms470
3009         _ident=$($_cc -version | head -n1 | tr -s ' ')
3010         _flags='--gcc --abi=eabi -me'
3011         _cc_e='-ppl -fe=$@'
3012         _cc_o='-fe=$@'
3013         _depflags='-ppa -ppd=$(@:.o=.d)'
3014         _cflags_speed='-O3 -mf=5'
3015         _cflags_size='-O3 -mf=2'
3016         _flags_filter=tms470_flags
3017     elif $_cc -v 2>&1 | grep -q clang; then
3018         _type=clang
3019         _ident=$($_cc --version 2>/dev/null | head -n1)
3020         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3021         _cflags_speed='-O3'
3022         _cflags_size='-Os'
3023     elif $_cc -V 2>&1 | grep -q Sun; then
3024         _type=suncc
3025         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3026         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3027         _DEPFLAGS='-xM1 -xc99'
3028         _ldflags='-std=c99'
3029         _cflags_speed='-O5'
3030         _cflags_size='-O5 -xspace'
3031         _flags_filter=suncc_flags
3032     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3033         _type=pathscale
3034         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3035         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3036         _cflags_speed='-O2'
3037         _cflags_size='-Os'
3038         _flags_filter='filter_out -Wdisabled-optimization'
3039     elif $_cc -v 2>&1 | grep -q Open64; then
3040         _type=open64
3041         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3042         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3043         _cflags_speed='-O2'
3044         _cflags_size='-Os'
3045         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3046     elif $_cc -V 2>&1 | grep -q Portland; then
3047         _type=pgi
3048         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3049         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3050         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3051         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3052         _cflags_noopt="-O1"
3053         _flags_filter=pgi_flags
3054     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3055         _type=armasm
3056         _ident=$($_cc | head -n1)
3057         # 4509: "This form of conditional instruction is deprecated"
3058         _flags="-nologo -ignore 4509"
3059         _flags_filter=armasm_flags
3060     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3061         _type=msvc
3062         _ident=$($_cc 2>&1 | head -n1)
3063         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3064         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3065         _cflags_speed="-O2"
3066         _cflags_size="-O1"
3067         if $_cc -nologo- 2>&1 | grep -q Linker; then
3068             _ld_o='-out:$@'
3069         else
3070             _ld_o='-Fe$@'
3071         fi
3072         _cc_o='-Fo$@'
3073         _cc_e='-P -Fi$@'
3074         _flags_filter=msvc_flags
3075         _ld_lib='lib%.a'
3076         _ld_path='-libpath:'
3077         _flags='-nologo'
3078         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS'
3079     elif $_cc 2>&1 | grep -q Intel; then
3080         _type=icl
3081         _ident=$($_cc 2>&1 | head -n1)
3082         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3083         # Not only is O3 broken on 13.x+ but it is slower on all previous
3084         # versions (tested) as well.
3085         _cflags_speed="-O2"
3086         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3087         if $_cc 2>&1 | grep -q Linker; then
3088             _ld_o='-out:$@'
3089         else
3090             _ld_o='-Fe$@'
3091         fi
3092         _cc_o='-Fo$@'
3093         _cc_e='-P'
3094         _flags_filter=icl_flags
3095         _ld_lib='lib%.a'
3096         _ld_path='-libpath:'
3097         # -Qdiag-error to make icl error when seeing certain unknown arguments
3098         _flags='-nologo -Qdiag-error:4044,10157'
3099         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3100         # with MSVC which enables it by default.
3101         _cflags='-D_USE_MATH_DEFINES -Qms0 -Qvec- -Qsimd- -GS'
3102     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3103         _type=cparser
3104         _ident=$($_cc --version | head -n1)
3105         _depflags='-MMD'
3106         _cflags_speed='-O4'
3107         _cflags_size='-O2'
3108         _flags_filter=cparser_flags
3109     fi
3110
3111     eval ${pfx}_type=\$_type
3112     eval ${pfx}_ident=\$_ident
3113 }
3114
3115 set_ccvars(){
3116     eval ${1}_C=\${_cc_c-\${${1}_C}}
3117     eval ${1}_E=\${_cc_e-\${${1}_E}}
3118     eval ${1}_O=\${_cc_o-\${${1}_O}}
3119
3120     if [ -n "$_depflags" ]; then
3121         eval ${1}_DEPFLAGS=\$_depflags
3122     else
3123         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3124         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3125         eval DEP${1}FLAGS=\$_flags
3126     fi
3127 }
3128
3129 probe_cc cc "$cc"
3130 cflags_filter=$_flags_filter
3131 cflags_speed=$_cflags_speed
3132 cflags_size=$_cflags_size
3133 cflags_noopt=$_cflags_noopt
3134 add_cflags $_flags $_cflags
3135 cc_ldflags=$_ldflags
3136 set_ccvars CC
3137
3138 probe_cc hostcc "$host_cc"
3139 host_cflags_filter=$_flags_filter
3140 add_host_cflags  $_flags $_cflags
3141 set_ccvars HOSTCC
3142
3143 test -n "$cc_type" && enable $cc_type ||
3144     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3145
3146 : ${as_default:=$cc}
3147 : ${dep_cc_default:=$cc}
3148 : ${ld_default:=$cc}
3149 : ${host_ld_default:=$host_cc}
3150 set_default ar as dep_cc ld host_ld
3151
3152 probe_cc as "$as"
3153 asflags_filter=$_flags_filter
3154 add_asflags $_flags $_cflags
3155 set_ccvars AS
3156
3157 probe_cc ld "$ld"
3158 ldflags_filter=$_flags_filter
3159 add_ldflags $_flags $_ldflags
3160 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3161 LD_O=${_ld_o-$LD_O}
3162 LD_LIB=${_ld_lib-$LD_LIB}
3163 LD_PATH=${_ld_path-$LD_PATH}
3164
3165 probe_cc hostld "$host_ld"
3166 host_ldflags_filter=$_flags_filter
3167 add_host_ldflags $_flags $_ldflags
3168 HOSTLD_O=${_ld_o-$HOSTLD_O}
3169
3170 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3171     probe_cc depcc "$dep_cc"
3172     CCDEP=${_DEPCMD:-$DEPCMD}
3173     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3174     DEPCCFLAGS=$_flags
3175 fi
3176
3177 if $ar 2>&1 | grep -q Microsoft; then
3178     arflags="-nologo"
3179     ar_o='-out:$@'
3180 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3181     arflags="rq"
3182     ar_o='$@'
3183 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3184     arflags='-Xany -r -c'
3185     ar_o='$@'
3186 else
3187     arflags="rc"
3188     ar_o='$@'
3189 fi
3190
3191 add_cflags $extra_cflags
3192 add_asflags $extra_cflags
3193
3194 if test -n "$sysroot"; then
3195     case "$cc_type" in
3196         gcc|llvm_gcc|clang)
3197             add_cppflags --sysroot="$sysroot"
3198             add_ldflags --sysroot="$sysroot"
3199         ;;
3200         tms470)
3201             add_cppflags -I"$sysinclude"
3202             add_ldflags  --sysroot="$sysroot"
3203         ;;
3204     esac
3205 fi
3206
3207 if test "$cpu" = host; then
3208     enabled cross_compile &&
3209         die "--cpu=host makes no sense when cross-compiling."
3210
3211     case "$cc_type" in
3212         gcc|llvm_gcc)
3213             check_native(){
3214                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3215                 sed -n "/cc1.*$1=/{
3216                             s/.*$1=\\([^ ]*\\).*/\\1/
3217                             p
3218                             q
3219                         }" $TMPE
3220             }
3221             cpu=$(check_native -march || check_native -mcpu)
3222         ;;
3223     esac
3224
3225     test "${cpu:-host}" = host &&
3226         die "--cpu=host not supported with compiler $cc"
3227 fi
3228
3229 # Deal with common $arch aliases
3230 case "$arch" in
3231     aarch64|arm64)
3232         arch="aarch64"
3233     ;;
3234     arm*)
3235         arch="arm"
3236     ;;
3237     mips*|IP*)
3238         arch="mips"
3239     ;;
3240     parisc*|hppa*)
3241         arch="parisc"
3242     ;;
3243     "Power Macintosh"|ppc*|powerpc*)
3244         arch="ppc"
3245     ;;
3246     s390|s390x)
3247         arch="s390"
3248     ;;
3249     sh4|sh)
3250         arch="sh4"
3251     ;;
3252     sun4u|sparc*)
3253         arch="sparc"
3254     ;;
3255     tilegx|tile-gx)
3256         arch="tilegx"
3257     ;;
3258     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3259         arch="x86"
3260     ;;
3261 esac
3262
3263 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3264 enable $arch
3265
3266 # Add processor-specific flags
3267 if enabled aarch64; then
3268
3269     case $cpu in
3270         armv*)
3271             cpuflags="-march=$cpu"
3272         ;;
3273         *)
3274             cpuflags="-mcpu=$cpu"
3275         ;;
3276     esac
3277
3278 elif enabled alpha; then
3279
3280     cpuflags="-mcpu=$cpu"
3281
3282 elif enabled arm; then
3283
3284     check_arm_arch() {
3285         check_cpp_condition stddef.h \
3286             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3287             $cpuflags
3288     }
3289
3290     probe_arm_arch() {
3291         if   check_arm_arch 4;        then echo armv4;
3292         elif check_arm_arch 4T;       then echo armv4t;
3293         elif check_arm_arch 5;        then echo armv5;
3294         elif check_arm_arch 5E;       then echo armv5e;
3295         elif check_arm_arch 5T;       then echo armv5t;
3296         elif check_arm_arch 5TE;      then echo armv5te;
3297         elif check_arm_arch 5TEJ;     then echo armv5te;
3298         elif check_arm_arch 6;        then echo armv6;
3299         elif check_arm_arch 6J;       then echo armv6j;
3300         elif check_arm_arch 6K;       then echo armv6k;
3301         elif check_arm_arch 6Z;       then echo armv6z;
3302         elif check_arm_arch 6ZK;      then echo armv6zk;
3303         elif check_arm_arch 6T2;      then echo armv6t2;
3304         elif check_arm_arch 7;        then echo armv7;
3305         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3306         elif check_arm_arch 7S;       then echo armv7-a;
3307         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3308         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3309         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3310         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3311         fi
3312     }
3313
3314     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3315
3316     case $cpu in
3317         armv*)
3318             cpuflags="-march=$cpu"
3319             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3320         ;;
3321         *)
3322             cpuflags="-mcpu=$cpu"
3323             case $cpu in
3324                 cortex-a*)                               subarch=armv7a  ;;
3325                 cortex-r*)                               subarch=armv7r  ;;
3326                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3327                 arm11*)                                  subarch=armv6   ;;
3328                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3329                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3330                 *)                             subarch=$(probe_arm_arch) ;;
3331             esac
3332         ;;
3333     esac
3334
3335     case "$subarch" in
3336         armv5t*)    enable fast_clz                ;;
3337         armv[6-8]*) enable fast_clz fast_unaligned ;;
3338     esac
3339
3340 elif enabled avr32; then
3341
3342     case $cpu in
3343         ap7[02]0[0-2])
3344             subarch="avr32_ap"
3345             cpuflags="-mpart=$cpu"
3346         ;;
3347         ap)
3348             subarch="avr32_ap"
3349             cpuflags="-march=$cpu"
3350         ;;
3351         uc3[ab]*)
3352             subarch="avr32_uc"
3353             cpuflags="-mcpu=$cpu"
3354         ;;
3355         uc)
3356             subarch="avr32_uc"
3357             cpuflags="-march=$cpu"
3358         ;;
3359     esac
3360
3361 elif enabled bfin; then
3362
3363     cpuflags="-mcpu=$cpu"
3364
3365 elif enabled mips; then
3366
3367     cpuflags="-march=$cpu"
3368
3369 elif enabled ppc; then
3370
3371     disable ldbrx
3372
3373     case $(tolower $cpu) in
3374         601|ppc601|powerpc601)
3375             cpuflags="-mcpu=601"
3376             disable altivec
3377         ;;
3378         603*|ppc603*|powerpc603*)
3379             cpuflags="-mcpu=603"
3380             disable altivec
3381         ;;
3382         604*|ppc604*|powerpc604*)
3383             cpuflags="-mcpu=604"
3384             disable altivec
3385         ;;
3386         g3|75*|ppc75*|powerpc75*)
3387             cpuflags="-mcpu=750"
3388             disable altivec
3389         ;;
3390         g4|745*|ppc745*|powerpc745*)
3391             cpuflags="-mcpu=7450"
3392             disable vsx
3393         ;;
3394         74*|ppc74*|powerpc74*)
3395             cpuflags="-mcpu=7400"
3396             disable vsx
3397         ;;
3398         g5|970|ppc970|powerpc970)
3399             cpuflags="-mcpu=970"
3400             disable vsx
3401         ;;
3402         power[3-6]*)
3403             cpuflags="-mcpu=$cpu"
3404             disable vsx
3405         ;;
3406         power[7-8]*)
3407             cpuflags="-mcpu=$cpu"
3408             enable ldbrx
3409         ;;
3410         cell)
3411             cpuflags="-mcpu=cell"
3412             enable ldbrx
3413             disable vsx
3414         ;;
3415         e500mc)
3416             cpuflags="-mcpu=e500mc"
3417             disable altivec
3418         ;;
3419         e500v2)
3420             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3421             disable altivec
3422             disable dcbzl
3423         ;;
3424         e500)
3425             cpuflags="-mcpu=8540 -mhard-float"
3426             disable altivec
3427             disable dcbzl
3428         ;;
3429     esac
3430
3431 elif enabled sparc; then
3432
3433     case $cpu in
3434         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3435             cpuflags="-mcpu=$cpu"
3436         ;;
3437         ultrasparc*|niagara[234])
3438             cpuflags="-mcpu=$cpu"
3439         ;;
3440     esac
3441
3442 elif enabled x86; then
3443
3444     case $cpu in
3445         i[345]86|pentium)
3446             cpuflags="-march=$cpu"
3447             disable i686
3448             disable mmx
3449         ;;
3450         # targets that do NOT support nopl and conditional mov (cmov)
3451         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3452             cpuflags="-march=$cpu"
3453             disable i686
3454         ;;
3455         # targets that do support nopl and conditional mov (cmov)
3456         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3457             cpuflags="-march=$cpu"
3458             enable i686
3459             enable fast_cmov
3460         ;;
3461         # targets that do support conditional mov but on which it's slow
3462         pentium4|pentium4m|prescott|nocona)
3463             cpuflags="-march=$cpu"
3464             enable i686
3465             disable fast_cmov
3466         ;;
3467     esac
3468
3469 fi
3470
3471 if [ "$cpu" != generic ]; then
3472     add_cflags  $cpuflags
3473     add_asflags $cpuflags
3474     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3475 fi
3476
3477 # compiler sanity check
3478 check_exec <<EOF
3479 int main(void){ return 0; }
3480 EOF
3481 if test "$?" != 0; then
3482     echo "$cc is unable to create an executable file."
3483     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3484         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3485         echo "Only do this if you know what cross compiling means."
3486     fi
3487     die "C compiler test failed."
3488 fi
3489
3490 add_cppflags -D_ISOC99_SOURCE
3491 check_cflags -std=c99
3492 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3493 #include <stdlib.h>
3494 EOF
3495 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3496 #include <stdlib.h>
3497 EOF
3498
3499 add_host_cppflags -D_ISOC99_SOURCE
3500 check_host_cflags -std=c99
3501 check_host_cflags -Wall
3502 check_host_cflags -O3
3503
3504 check_64bit(){
3505     arch32=$1
3506     arch64=$2
3507     expr=$3
3508     check_code cc "" "int test[2*($expr) - 1]" &&
3509         subarch=$arch64 || subarch=$arch32
3510 }
3511
3512 case "$arch" in
3513     aarch64|alpha|ia64)
3514         spic=$shared
3515     ;;
3516     mips)
3517         check_64bit mips mips64 '_MIPS_SIM > 1'
3518         spic=$shared
3519     ;;
3520     parisc)
3521         check_64bit parisc parisc64 'sizeof(void *) > 4'
3522         spic=$shared
3523     ;;
3524     ppc)
3525         check_64bit ppc ppc64 'sizeof(void *) > 4'
3526         spic=$shared
3527     ;;
3528     s390)
3529         check_64bit s390 s390x 'sizeof(void *) > 4'
3530         spic=$shared
3531     ;;
3532     sparc)
3533         check_64bit sparc sparc64 'sizeof(void *) > 4'
3534         spic=$shared
3535     ;;
3536     x86)
3537         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3538         if test "$subarch" = "x86_64"; then
3539             spic=$shared
3540         fi
3541     ;;
3542 esac
3543
3544 enable $subarch
3545 enabled spic && enable_weak pic
3546
3547 # OS specific
3548 case $target_os in
3549     aix)
3550         SHFLAGS=-shared
3551         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3552         enabled shared && add_ldflags -Wl,-brtl
3553         ;;
3554     android)
3555         disable symver
3556         enable section_data_rel_ro
3557         SLIB_INSTALL_NAME='$(SLIBNAME)'
3558         SLIB_INSTALL_LINKS=
3559         # soname not set on purpose
3560         SHFLAGS=-shared
3561         ;;
3562     haiku)
3563         prefix_default="/boot/common"
3564         network_extralibs="-lnetwork"
3565         host_libs=
3566         ;;
3567     sunos)
3568         SHFLAGS='-shared -Wl,-h,$$(@F)'
3569         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3570         network_extralibs="-lsocket -lnsl"
3571         # When using suncc to build, the Solaris linker will mark
3572         # an executable with each instruction set encountered by
3573         # the Solaris assembler.  As our libraries contain their own
3574         # guards for processor-specific code, instead suppress
3575         # generation of the HWCAPS ELF section on Solaris x86 only.
3576         enabled_all suncc x86 &&
3577             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3578             add_ldflags -Wl,-M,mapfile
3579         nm_default='nm -P -g'
3580         ;;
3581     netbsd)
3582         disable symver
3583         oss_indev_extralibs="-lossaudio"
3584         oss_outdev_extralibs="-lossaudio"
3585         ;;
3586     openbsd|bitrig)
3587         disable symver
3588         SHFLAGS='-shared'
3589         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3590         SLIB_INSTALL_LINKS=
3591         oss_indev_extralibs="-lossaudio"
3592         oss_outdev_extralibs="-lossaudio"
3593         ;;
3594     dragonfly)
3595         disable symver
3596         ;;
3597     freebsd)
3598         ;;
3599     bsd/os)
3600         add_extralibs -lpoll -lgnugetopt
3601         ;;
3602     darwin)
3603         enabled ppc && add_asflags -force_cpusubtype_ALL
3604         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3605         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3606         add_ldflags -Wl,-dynamic,-search_paths_first
3607         SLIBSUF=".dylib"
3608         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3609         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3610         objformat="macho"
3611         enabled x86_64 && objformat="macho64"
3612         enabled_any pic shared ||
3613             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3614         ;;
3615     mingw32*)
3616         if test $target_os = "mingw32ce"; then
3617             disable network
3618         else
3619             target_os=mingw32
3620         fi
3621         LIBTARGET=i386
3622         if enabled x86_64; then
3623             LIBTARGET="i386:x86-64"
3624         elif enabled arm; then
3625             LIBTARGET=arm-wince
3626         fi
3627         check_ldflags -Wl,--nxcompat
3628         check_ldflags -Wl,--dynamicbase
3629         shlibdir_default="$bindir_default"
3630         SLIBPREF=""
3631         SLIBSUF=".dll"
3632         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3633         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3634         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3635         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3636         SLIB_INSTALL_LINKS=
3637         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3638         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3639         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3640         objformat="win32"
3641         dlltool="${cross_prefix}dlltool"
3642         ranlib=:
3643         enable dos_paths
3644         ;;
3645     win32|win64)
3646         disable symver
3647         if enabled shared; then
3648             # Link to the import library instead of the normal static library
3649             # for shared libs.
3650             LD_LIB='%.lib'
3651             # Cannot build both shared and static libs with MSVC or icl.
3652             disable static
3653         fi
3654         shlibdir_default="$bindir_default"
3655         SLIBPREF=""
3656         SLIBSUF=".dll"
3657         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3658         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3659         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3660         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3661         SLIB_INSTALL_LINKS=
3662         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3663         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3664         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3665         objformat="win32"
3666         ranlib=:
3667         enable dos_paths
3668         ;;
3669     cygwin*)
3670         target_os=cygwin
3671         shlibdir_default="$bindir_default"
3672         SLIBPREF="cyg"
3673         SLIBSUF=".dll"
3674         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3675         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3676         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3677         SLIB_INSTALL_LINKS=
3678         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3679         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3680         objformat="win32"
3681         enable dos_paths
3682         ;;
3683     *-dos|freedos|opendos)
3684         network_extralibs="-lsocket"
3685         objformat="coff"
3686         enable dos_paths
3687         add_cppflags -U__STRICT_ANSI__
3688         ;;
3689     linux)
3690         enable dv1394
3691         enable section_data_rel_ro
3692         ;;
3693     irix*)
3694         target_os=irix
3695         ranlib="echo ignoring ranlib"
3696         ;;
3697     os/2*)
3698         ln_s="cp -f"
3699         objformat="aout"
3700         add_cppflags -D_GNU_SOURCE
3701         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3702         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3703         LIBSUF="_s.a"
3704         SLIBPREF=""
3705         SLIBSUF=".dll"
3706         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3707         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3708         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3709             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3710             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3711             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3712             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3713         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3714             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3715         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3716         enable dos_paths
3717         ;;
3718     gnu/kfreebsd)
3719         add_cppflags -D_BSD_SOURCE
3720         ;;
3721     gnu)
3722         ;;
3723     qnx)
3724         add_cppflags -D_QNX_SOURCE
3725         network_extralibs="-lsocket"
3726         ;;
3727     symbian)
3728         SLIBSUF=".dll"
3729         enable dos_paths
3730         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3731         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3732         add_ldflags -Wl,--target1-abs,--no-undefined \
3733                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3734                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3735         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3736                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3737                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3738         ;;
3739     osf1)
3740         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3741         ;;
3742     minix)
3743         ;;
3744     plan9)
3745         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3746                      -D_REENTRANT_SOURCE        \
3747                      -D_RESEARCH_SOURCE         \
3748                      -DFD_SETSIZE=96            \
3749                      -DHAVE_SOCK_OPTS
3750         add_compat strtod.o strtod=avpriv_strtod
3751         network_extralibs='-lbsd'
3752         exeobjs=compat/plan9/main.o
3753         cp_f='cp'
3754         ;;
3755     none)
3756         ;;
3757     *)
3758         die "Unknown OS '$target_os'."
3759         ;;
3760 esac
3761
3762 # determine libc flavour
3763
3764 probe_libc(){
3765     pfx=$1
3766     pfx_no_=${pfx%_}
3767     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3768     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3769         eval ${pfx}libc_type=uclibc
3770         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3771     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3772         eval ${pfx}libc_type=glibc
3773         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3774     # MinGW headers can be installed on Cygwin, so check for newlib first.
3775     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3776         eval ${pfx}libc_type=newlib
3777         add_${pfx}cppflags -U__STRICT_ANSI__
3778     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3779     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3780         eval ${pfx}libc_type=mingw64
3781         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3782         eval test \$${pfx_no_}cc_type = "gcc" &&
3783             add_${pfx}cppflags -D__printf__=__gnu_printf__
3784     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3785          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3786         eval ${pfx}libc_type=mingw32
3787         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3788             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3789             die "ERROR: MinGW32 runtime version must be >= 3.15."
3790         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3791         eval test \$${pfx_no_}cc_type = "gcc" &&
3792             add_${pfx}cppflags -D__printf__=__gnu_printf__
3793     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3794         eval ${pfx}libc_type=msvcrt
3795         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
3796             if [ "$pfx" = host_ ]; then
3797                 add_host_cppflags -Dsnprintf=_snprintf
3798             else
3799                 add_compat strtod.o strtod=avpriv_strtod
3800                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3801                                              _snprintf=avpriv_snprintf  \
3802                                              vsnprintf=avpriv_vsnprintf
3803             fi
3804         fi
3805         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3806         # 0x601 by default unless something else is set by the user.
3807         # This can easily lead to us detecting functions only present
3808         # in such new versions and producing binaries requiring windows 7.0.
3809         # Therefore explicitly set the default to XP unless the user has
3810         # set something else on the command line.
3811         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
3812         # family. For these cases, configure is free to use any functions
3813         # found in the SDK headers by default. (Alternatively, we could force
3814         # _WIN32_WINNT to 0x0602 in that case.)
3815         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
3816             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
3817 #ifdef WINAPI_FAMILY
3818 #include <winapifamily.h>
3819 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
3820 #error not desktop
3821 #endif
3822 #endif
3823 EOF
3824     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
3825         eval ${pfx}libc_type=klibc
3826     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
3827         eval ${pfx}libc_type=bionic
3828     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
3829         eval ${pfx}libc_type=solaris
3830         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
3831     else
3832         eval ${pfx}libc_type=default
3833         add_${pfx}cppflags -D_DEFAULT_SOURCE
3834     fi
3835 }
3836
3837 probe_libc
3838 test -n "$libc_type" && enable libc_$libc_type
3839 probe_libc host_
3840 test -n "$host_libc_type" && enable host_libc_$host_libc_type
3841
3842 case $libc_type in
3843     bionic)
3844         add_compat strtod.o strtod=avpriv_strtod
3845         ;;
3846 esac
3847
3848 # hacks for compiler/libc/os combinations
3849
3850 if enabled_all tms470 libc_glibc; then
3851     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
3852     add_cppflags -D__USER_LABEL_PREFIX__=
3853     add_cppflags -D__builtin_memset=memset
3854     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
3855     add_cflags   -pds=48    # incompatible redefinition of macro
3856 fi
3857
3858 if enabled_all ccc libc_glibc; then
3859     add_ldflags -Wl,-z,now  # calls to libots crash without this
3860 fi
3861
3862 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
3863     add_cppflags '-I\$(SRC_PATH)/compat/float'
3864
3865 esc(){
3866     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
3867 }
3868
3869 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
3870
3871 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
3872
3873 set_default $PATHS_LIST
3874 set_default nm
3875
3876 # we need to build at least one lib type
3877 if ! enabled_any static shared; then
3878     cat <<EOF
3879 At least one library type must be built.
3880 Specify --enable-static to build the static libraries or --enable-shared to
3881 build the shared libraries as well. To only build the shared libraries specify
3882 --disable-static in addition to --enable-shared.
3883 EOF
3884     exit 1;
3885 fi
3886
3887 die_license_disabled() {
3888     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
3889 }
3890
3891 die_license_disabled gpl libcdio
3892 die_license_disabled gpl libx264
3893 die_license_disabled gpl libx265
3894 die_license_disabled gpl libxavs
3895 die_license_disabled gpl libxvid
3896 die_license_disabled gpl x11grab
3897
3898 die_license_disabled nonfree libfaac
3899 die_license_disabled nonfree libfdk_aac
3900 die_license_disabled nonfree nvenc
3901 die_license_disabled nonfree openssl
3902
3903 die_license_disabled version3 libopencore_amrnb
3904 die_license_disabled version3 libopencore_amrwb
3905 die_license_disabled version3 libvo_aacenc
3906 die_license_disabled version3 libvo_amrwbenc
3907
3908 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
3909
3910 disabled optimizations || check_cflags -fomit-frame-pointer
3911
3912 enable_weak_pic() {
3913     disabled pic && return
3914     enable pic
3915     add_cppflags -DPIC
3916     case "$target_os" in
3917     mingw*|cygwin*)
3918         ;;
3919     *)
3920         add_cflags -fPIC
3921         ;;
3922     esac
3923     add_asflags  -fPIC
3924 }
3925
3926 enabled pic && enable_weak_pic
3927
3928 check_cc <<EOF || die "Symbol mangling check failed."
3929 int ff_extern;
3930 EOF
3931 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
3932 extern_prefix=${sym%%ff_extern*}
3933
3934 check_cc <<EOF && enable_weak inline_asm
3935 void foo(void) { __asm__ volatile ("" ::); }
3936 EOF
3937
3938 _restrict=
3939 for restrict_keyword in restrict __restrict__ __restrict; do
3940     check_cc <<EOF && _restrict=$restrict_keyword && break
3941 void foo(char * $restrict_keyword p);
3942 EOF
3943 done
3944
3945 check_cc <<EOF && enable pragma_deprecated
3946 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
3947 EOF
3948
3949 check_cc <<EOF && enable attribute_packed
3950 struct { int x; } __attribute__((packed)) x;
3951 EOF
3952
3953 check_cc <<EOF && enable attribute_may_alias
3954 union { int x; } __attribute__((may_alias)) x;
3955 EOF
3956
3957 check_cc <<EOF || die "endian test failed"
3958 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
3959 EOF
3960 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
3961
3962 check_gas() {
3963     log "check_gas using '$as' as AS"
3964     # :vararg is used on aarch64, arm and ppc altivec
3965     check_as <<EOF || return 1
3966 .macro m n, y:vararg=0
3967 \n: .int \y
3968 .endm
3969 m x
3970 EOF
3971     # .altmacro is only used in arm asm
3972     ! enabled arm || check_as <<EOF || return 1
3973 .altmacro
3974 EOF
3975     enable gnu_as
3976     return 0
3977 }
3978
3979 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
3980     nogas=:
3981     enabled_any arm aarch64 && nogas=die
3982     enabled_all ppc altivec && nogas=warn
3983     as_noop=-v
3984
3985     case $as_type in
3986         arm*) gaspp_as_type=armasm; as_noop=-h ;;
3987         gcc)  gaspp_as_type=gas ;;
3988         *)    gaspp_as_type=$as_type ;;
3989     esac
3990
3991     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
3992
3993     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
3994         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
3995
3996     if ! check_gas ; then
3997         as=${gas:=$as}
3998         check_gas || \
3999             $nogas "GNU assembler not found, install/update gas-preprocessor"
4000     fi
4001
4002     check_as <<EOF && enable as_func
4003 .func test
4004 .endfunc
4005 EOF
4006 fi
4007
4008 check_inline_asm inline_asm_labels '"1:\n"'
4009
4010 if enabled aarch64; then
4011     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4012     # internal assembler in clang 3.3 does not support this instruction
4013     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4014     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4015
4016     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4017
4018 elif enabled alpha; then
4019
4020     check_cflags -mieee
4021
4022 elif enabled arm; then
4023
4024     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4025     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4026     enabled thumb && check_cflags -mthumb || check_cflags -marm
4027
4028     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4029         enable vfp_args
4030     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4031         enable vfp_args
4032     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4033         case "${cross_prefix:-$cc}" in
4034             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4035             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4036 __asm__ (".eabi_attribute 28, 1");
4037 int main(void) { return 0; }
4038 EOF
4039         esac
4040         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4041     fi
4042
4043     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4044     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4045     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4046     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4047     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4048     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4049
4050     [ $target_os = linux ] || [ $target_os = android ] ||
4051         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4052             $ARCH_EXT_LIST_ARM
4053
4054     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4055
4056     check_as <<EOF && enable as_dn_directive
4057 ra .dn d0.i16
4058 .unreq ra
4059 EOF
4060
4061     # llvm's integrated assembler supports .object_arch from llvm 3.5
4062     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4063 .object_arch armv4
4064 EOF
4065
4066     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4067
4068 elif enabled mips; then
4069
4070     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4071
4072     # make sure that only an instruction set is enabled
4073     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4074
4075     if enabled mips64; then
4076         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4077             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4078                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4079     else
4080         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4081             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4082                 check_inline_asm mips32r1 '"daddi $0, $0, 0"'
4083     fi
4084
4085 elif enabled parisc; then
4086
4087     if enabled gcc; then
4088         case $($cc -dumpversion) in
4089             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4090         esac
4091     fi
4092
4093 elif enabled ppc; then
4094
4095     enable local_aligned_8 local_aligned_16
4096
4097     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4098     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4099     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4100     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4101
4102     # AltiVec flags: The FSF version of GCC differs from the Apple version
4103     if enabled altivec; then
4104         check_cflags -maltivec -mabi=altivec &&
4105         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4106         check_cflags -faltivec
4107
4108         # check if our compiler supports Motorola AltiVec C API
4109         check_cc <<EOF || disable altivec
4110 $inc_altivec_h
4111 int main(void) {
4112     vector signed int v1 = (vector signed int) { 0 };
4113     vector signed int v2 = (vector signed int) { 1 };
4114     v1 = vec_add(v1, v2);
4115     return 0;
4116 }
4117 EOF
4118
4119         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4120     fi
4121
4122     if enabled vsx; then
4123         check_cflags -mvsx &&
4124         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4125     fi
4126
4127     if enabled power8; then
4128         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4129     fi
4130
4131 elif enabled x86; then
4132
4133     check_builtin rdtsc    intrin.h   "__rdtsc()"
4134     check_builtin mm_empty mmintrin.h "_mm_empty()"
4135
4136     enable local_aligned_8 local_aligned_16
4137
4138     # check whether EBP is available on x86
4139     # As 'i' is stored on the stack, this program will crash
4140     # if the base pointer is used to access it because the
4141     # base pointer is cleared in the inline assembly code.
4142     check_exec_crash <<EOF && enable ebp_available
4143 volatile int i=0;
4144 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4145 return i;
4146 EOF
4147
4148     # check whether EBX is available on x86
4149     check_inline_asm ebx_available '""::"b"(0)' &&
4150         check_inline_asm ebx_available '"":::"%ebx"'
4151
4152     # check whether xmm clobbers are supported
4153     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4154
4155     # check whether binutils is new enough to compile SSSE3/MMXEXT
4156     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4157     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4158
4159     if ! disabled_any asm mmx yasm; then
4160         if check_cmd $yasmexe --version; then
4161             enabled x86_64 && yasm_extra="-m amd64"
4162             yasm_debug="-g dwarf2"
4163         elif check_cmd nasm -v; then
4164             yasmexe=nasm
4165             yasm_debug="-g -F dwarf"
4166             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4167         fi
4168
4169         YASMFLAGS="-f $objformat $yasm_extra"
4170         enabled pic               && append YASMFLAGS "-DPIC"
4171         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4172         case "$objformat" in
4173             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4174         esac
4175
4176         check_yasm "movbe ecx, [5]" && enable yasm ||
4177             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4178         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4179         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4180         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4181         check_yasm "CPU amdnop" || disable cpunop
4182     fi
4183
4184     case "$cpu" in
4185         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4186             disable fast_clz
4187         ;;
4188     esac
4189
4190 fi
4191
4192 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4193
4194 check_ldflags -Wl,--as-needed
4195
4196 if check_func dlopen; then
4197     ldl=
4198 elif check_func dlopen -ldl; then
4199     ldl=-ldl
4200 fi
4201
4202 if ! disabled network; then
4203     check_func getaddrinfo $network_extralibs
4204     check_func getservbyport $network_extralibs
4205     check_func inet_aton $network_extralibs
4206
4207     check_type netdb.h "struct addrinfo"
4208     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4209     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4210     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4211     check_type poll.h "struct pollfd"
4212     check_type netinet/sctp.h "struct sctp_event_subscribe"
4213     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4214     check_type netinet/in.h "struct sockaddr_in6"
4215     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4216     check_type "sys/types.h sys/socket.h" socklen_t
4217
4218     # Prefer arpa/inet.h over winsock2
4219     if check_header arpa/inet.h ; then
4220         check_func closesocket
4221     elif check_header winsock2.h ; then
4222         check_func_headers winsock2.h closesocket -lws2 &&
4223             network_extralibs="-lws2" ||
4224         { check_func_headers winsock2.h closesocket -lws2_32 &&
4225             network_extralibs="-lws2_32"; } || disable winsock2_h network
4226         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4227
4228         check_type ws2tcpip.h socklen_t
4229         check_type ws2tcpip.h "struct addrinfo"
4230         check_type ws2tcpip.h "struct group_source_req"
4231         check_type ws2tcpip.h "struct ip_mreq_source"
4232         check_type ws2tcpip.h "struct ipv6_mreq"
4233         check_type winsock2.h "struct pollfd"
4234         check_struct winsock2.h "struct sockaddr" sa_len
4235         check_type ws2tcpip.h "struct sockaddr_in6"
4236         check_type ws2tcpip.h "struct sockaddr_storage"
4237     else
4238         disable network
4239     fi
4240 fi
4241
4242 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4243 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4244 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4245 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4246
4247 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4248 check_func  ${malloc_prefix}memalign            && enable memalign
4249 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4250
4251 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4252     check_func_headers time.h clock_gettime || { check_func_headers time.h clock_gettime -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
4253
4254 check_func  fcntl
4255 check_func  fork
4256 check_func  gethrtime
4257 check_func  getopt
4258 check_func  getrusage
4259 check_func  gettimeofday
4260 check_func  gmtime_r
4261 check_func  isatty
4262 check_func  localtime_r
4263 check_func  mach_absolute_time
4264 check_func  mkstemp
4265 check_func  mmap
4266 check_func  mprotect
4267 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4268 check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt; }
4269 check_func  sched_getaffinity
4270 check_func  setrlimit
4271 check_func  strerror_r
4272 check_func  sysconf
4273 check_func  sysctl
4274 check_func  usleep
4275
4276 check_func_headers io.h setmode
4277 check_func_headers stdlib.h getenv
4278
4279 check_func_headers windows.h CoTaskMemFree -lole32
4280 check_func_headers windows.h GetProcessAffinityMask
4281 check_func_headers windows.h GetProcessTimes
4282 check_func_headers windows.h GetSystemTimeAsFileTime
4283 check_func_headers windows.h LoadLibrary
4284 check_func_headers windows.h MapViewOfFile
4285 check_func_headers windows.h SetConsoleTextAttribute
4286 check_func_headers windows.h Sleep
4287 check_func_headers windows.h VirtualAlloc
4288 check_struct windows.h "CONDITION_VARIABLE" Ptr
4289
4290 check_header direct.h
4291 check_header dlfcn.h
4292 check_header d3d11.h
4293 check_header dxva.h
4294 check_header dxva2api.h
4295 check_header io.h
4296 check_header mach/mach_time.h
4297 check_header malloc.h
4298 check_header poll.h
4299 check_header sys/mman.h
4300 check_header sys/param.h
4301 check_header sys/resource.h
4302 check_header sys/select.h
4303 check_header sys/time.h
4304 check_header sys/un.h
4305 check_header unistd.h
4306 check_header valgrind/valgrind.h
4307 check_header vdpau/vdpau.h
4308 check_header vdpau/vdpau_x11.h
4309 check_header VideoDecodeAcceleration/VDADecoder.h
4310 check_header windows.h
4311 check_header X11/extensions/XvMClib.h
4312
4313 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
4314 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
4315 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
4316
4317 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4318
4319 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4320 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4321 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4322
4323 if ! disabled w32threads && ! enabled pthreads; then
4324     check_func_headers "windows.h process.h" _beginthreadex &&
4325         enable w32threads || disable w32threads
4326 fi
4327
4328 # check for some common methods of building with pthread support
4329 # do this before the optional library checks as some of them require pthreads
4330 if ! disabled pthreads && ! enabled w32threads; then
4331     enable pthreads
4332     if check_func pthread_join -pthread; then
4333         add_cflags -pthread
4334         add_extralibs -pthread
4335     elif check_func pthread_join -pthreads; then
4336         add_cflags -pthreads
4337         add_extralibs -pthreads
4338     elif check_func pthread_join -lpthreadGC2; then
4339         add_extralibs -lpthreadGC2
4340     elif check_lib pthread.h pthread_join -lpthread; then
4341         :
4342     elif ! check_func pthread_join; then
4343         disable pthreads
4344     fi
4345 fi
4346
4347 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
4348 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4349
4350 check_lib math.h sin -lm && LIBM="-lm"
4351 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4352
4353 atan2f_args=2
4354 ldexpf_args=2
4355 powf_args=2
4356
4357 for func in $MATH_FUNCS; do
4358     eval check_mathfunc $func \${${func}_args:-1}
4359 done
4360
4361 # these are off by default, so fail if requested and not available
4362 enabled avisynth          && { check_lib2 "avisynth/avisynth_c.h windows.h" LoadLibrary ||
4363                                check_lib2 "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl   ||
4364                                die "ERROR: LoadLibrary/dlopen not found, or avisynth header not found"; }
4365 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4366 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4367 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4368 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4369 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4370 enabled libfdk_aac        && require_pkg_config fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4371 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4372 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4373 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4374                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4375                                done || die "ERROR: libgsm not found"; }
4376 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4377 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
4378 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4379 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4380 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4381 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4382 enabled libopenh264       && require_pkg_config openh264 wels/codec_api.h WelsGetCodecVersion
4383 enabled libopenjpeg       && { { check_header openjpeg.h && check_lib2 openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC; } ||
4384                                { require_pkg_config libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; } }
4385 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4386 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4387 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4388 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4389 enabled libsnappy         && require snappy snappy-c.h snappy_compress -lsnappy
4390 enabled libspeex          && require_pkg_config speex speex/speex.h speex_decoder_init -lspeex
4391 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4392 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4393 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4394 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4395 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4396 enabled libvpx            && require_pkg_config "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4397     enabled libvpx_vp8_decoder && {
4398         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4399             disable libvpx_vp8_decoder;
4400     }
4401     enabled libvpx_vp8_encoder && {
4402         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4403             disable libvpx_vp8_encoder;
4404     }
4405     enabled libvpx_vp9_decoder && {
4406         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4407             disable libvpx_vp9_decoder;
4408     }
4409     enabled libvpx_vp9_encoder && {
4410         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4411             disable libvpx_vp9_encoder;
4412     }
4413     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4414         die "libvpx enabled but no supported decoders found"
4415     fi
4416 }
4417 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4418 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4419 enabled libx264           && require_pkg_config x264 "stdint.h x264.h" x264_encoder_encode &&
4420                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4421                                die "ERROR: libx264 version must be >= 0.118."; } &&
4422                              { check_cpp_condition x264.h "X264_MPEG2" &&
4423                                enable libx262; }
4424 enabled libx265           && require_pkg_config x265 x265.h x265_api_get &&
4425                              { check_cpp_condition x265.h "X265_BUILD >= 57" ||
4426                                die "ERROR: libx265 version must be >= 57."; }
4427 enabled libxavs           && require libxavs xavs.h xavs_encoder_encode -lxavs
4428 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4429 enabled mmal              && { check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4430                                 { ! enabled cross_compile && {
4431                                     add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline ;
4432                                     add_extralibs -L/opt/vc/lib/ -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ;
4433                                     check_lib interface/mmal/mmal.h mmal_port_connect ; }
4434                                 check_lib interface/mmal/mmal.h mmal_port_connect ; } ||
4435                                die "ERROR: mmal not found"; }
4436 enabled openssl           && { check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4437                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4438                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4439                                die "ERROR: openssl not found"; }
4440
4441 if enabled gnutls; then
4442     { check_lib2 gmp.h mpz_export -lgmp && enable gmp; } ||
4443     { check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }
4444 fi
4445
4446 # libdc1394 check
4447 if enabled libdc1394; then
4448     { require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new &&
4449         enable libdc1394_2; } ||
4450     { check_lib libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394 &&
4451         enable libdc1394_1; } ||
4452     die "ERROR: No version of libdc1394 found "
4453 fi
4454
4455 if enabled nvenc; then
4456     check_header cuda.h || die "ERROR: cuda.h not found.";
4457     check_header nvEncodeAPI.h || die "ERROR: nvEncodeAPI.h not found.";
4458     check_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 5" ||
4459         die "ERROR: NVENC API version 4 or older is not supported";
4460 fi
4461
4462 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4463     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4464     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4465     enable sdl
4466 fi
4467
4468 pod2man --help     > /dev/null 2>&1 && enable pod2man   || disable pod2man
4469 texi2html -version > /dev/null 2>&1 && enable texi2html || disable texi2html
4470
4471 check_header linux/fb.h
4472 check_header linux/videodev2.h
4473 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4474
4475 check_header sys/videoio.h
4476
4477 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
4478 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4479 # w32api 3.12 had it defined wrong
4480 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4481
4482 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4483 { check_header dev/bktr/ioctl_meteor.h &&
4484   check_header dev/bktr/ioctl_bt848.h; } ||
4485 { check_header machine/ioctl_meteor.h &&
4486   check_header machine/ioctl_bt848.h; } ||
4487 { check_header dev/video/meteor/ioctl_meteor.h &&
4488   check_header dev/video/bktr/ioctl_bt848.h; } ||
4489 check_header dev/ic/bt8xx.h
4490
4491 check_header sndio.h
4492 check_header sys/soundcard.h
4493 check_header soundcard.h
4494
4495 enabled_any alsa_indev alsa_outdev &&
4496     check_lib2 alsa/asoundlib.h snd_pcm_htimestamp -lasound
4497
4498 enabled jack_indev && check_lib2 jack/jack.h jack_client_open -ljack &&
4499     check_func jack_port_get_latency_range -ljack
4500
4501 enabled_any sndio_indev sndio_outdev && check_lib2 sndio.h sio_open -lsndio
4502
4503 if enabled libcdio; then
4504     check_lib2 "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4505     check_lib2 "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4506     die "ERROR: No usable libcdio/cdparanoia found"
4507 fi
4508
4509 check_lib X11/Xlib.h XOpenDisplay -lX11 && enable xlib
4510
4511 if enabled libxcb || enabled x11grab && ! disabled libxcb; then
4512     check_pkg_config xcb-shape xcb/shape.h xcb_shape_rectangles || {
4513         enabled libxcb && die "ERROR: libxcb not found";
4514     } && disable x11grab && enable libxcb
4515
4516     disabled libxcb_shm ||
4517         check_pkg_config xcb-shm xcb/shm.h xcb_shm_attach || {
4518             enabled libxcb_shm && die "ERROR: libxcb_shm not found";
4519         } && check_header sys/shm.h && enable libxcb_shm
4520
4521     disabled libxcb_xfixes ||
4522         check_pkg_config xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image || {
4523             enabled libxcb_xfixes && die "ERROR: libxcb_xfixes not found";
4524         } && enable libxcb_xfixes
4525
4526     add_cflags "$xcb_event_cflags $xcb_shm_cflags $xcb_xfixes_cflags"
4527     add_extralibs "$xcb_event_libs $xcb_shm_libs $xcb_xfixes_libs"
4528 fi
4529
4530 if enabled x11grab; then
4531     enabled xlib || die "ERROR: Xlib not found"
4532     require Xext X11/extensions/XShm.h XShmCreateImage -lXext
4533     require Xfixes X11/extensions/Xfixes.h XFixesGetCursorImage -lXfixes
4534 fi
4535
4536 enabled vaapi && enabled xlib &&
4537     check_lib2 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 &&
4538     enable vaapi_x11
4539
4540 enabled vdpau &&
4541     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4542     disable vdpau
4543
4544 enabled vdpau && enabled xlib &&
4545     check_func_headers "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau &&
4546     prepend avconv_libs $($ldflags_filter "-lvdpau") &&
4547     enable vdpau_x11
4548
4549 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4550
4551 # add some useful compiler flags if supported
4552 check_cflags -Wdeclaration-after-statement
4553 check_cflags -Wall
4554 check_cflags -Wdisabled-optimization
4555 check_cflags -Wpointer-arith
4556 check_cflags -Wredundant-decls
4557 check_cflags -Wcast-qual
4558 check_cflags -Wwrite-strings
4559 check_cflags -Wtype-limits
4560 check_cflags -Wundef
4561 check_cflags -Wmissing-prototypes
4562 check_cflags -Wstrict-prototypes
4563 enabled extra_warnings && check_cflags -Winline
4564
4565 check_disable_warning(){
4566     warning_flag=-W${1#-Wno-}
4567     test_cflags $warning_flag && add_cflags $1
4568 }
4569
4570 check_disable_warning -Wno-parentheses
4571 check_disable_warning -Wno-switch
4572 check_disable_warning -Wno-format-zero-length
4573 check_disable_warning -Wno-pointer-sign
4574
4575 # add some linker flags
4576 check_ldflags -Wl,--warn-common
4577 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4578 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir
4579 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
4580
4581 # add some strip flags
4582 # -wN '..@*' is more selective than -x, but not available everywhere.
4583 check_stripflags -wN \'..@*\' || check_stripflags -x || strip='true'
4584
4585 enabled neon_clobber_test &&
4586     check_ldflags -Wl,--wrap,avcodec_open2              \
4587                   -Wl,--wrap,avcodec_decode_audio4      \
4588                   -Wl,--wrap,avcodec_decode_video2      \
4589                   -Wl,--wrap,avcodec_decode_subtitle2   \
4590                   -Wl,--wrap,avcodec_encode_audio2      \
4591                   -Wl,--wrap,avcodec_encode_video2      \
4592                   -Wl,--wrap,avcodec_encode_subtitle    \
4593                   -Wl,--wrap,avresample_convert ||
4594     disable neon_clobber_test
4595
4596 enabled xmm_clobber_test &&
4597     check_ldflags -Wl,--wrap,avcodec_open2              \
4598                   -Wl,--wrap,avcodec_decode_audio4      \
4599                   -Wl,--wrap,avcodec_decode_video2      \
4600                   -Wl,--wrap,avcodec_decode_subtitle2   \
4601                   -Wl,--wrap,avcodec_encode_audio2      \
4602                   -Wl,--wrap,avcodec_encode_video2      \
4603                   -Wl,--wrap,avcodec_encode_subtitle    \
4604                   -Wl,--wrap,avresample_convert         \
4605                   -Wl,--wrap,sws_scale ||
4606     disable xmm_clobber_test
4607
4608 echo "X{};" > $TMPV
4609 if test_ldflags -Wl,--version-script,$TMPV; then
4610     append SHFLAGS '-Wl,--version-script,\$(SUBDIR)lib\$(NAME).ver'
4611     check_cc <<EOF && enable symver_asm_label
4612 void ff_foo(void) __asm__ ("av_foo@VERSION");
4613 void ff_foo(void) { ${inline_asm+__asm__($quotes);} }
4614 EOF
4615     check_cc <<EOF && enable symver_gnu_asm
4616 __asm__(".symver ff_foo,av_foo@VERSION");
4617 void ff_foo(void) {}
4618 EOF
4619 fi
4620
4621 if [ -z "$optflags" ]; then
4622     if enabled small; then
4623         optflags=$cflags_size
4624     elif enabled optimizations; then
4625         optflags=$cflags_speed
4626     else
4627         optflags=$cflags_noopt
4628     fi
4629 fi
4630
4631 check_optflags(){
4632     check_cflags "$@"
4633     enabled lto && check_ldflags "$@"
4634 }
4635
4636
4637 if enabled lto; then
4638     test "$cc_type" != "$ld_type" && die "LTO requires same compiler and linker"
4639     check_cflags  -flto
4640     check_ldflags -flto $cpuflags
4641 fi
4642
4643 check_optflags $optflags
4644 check_optflags -fno-math-errno
4645 check_optflags -fno-signed-zeros
4646
4647 if enabled icc; then
4648     # Just warnings, no remarks
4649     check_cflags -w1
4650     # -wd: Disable following warnings
4651     # 144, 167, 556: -Wno-pointer-sign
4652     # 1292: attribute "foo" ignored
4653     # 1419: external declaration in primary source file
4654     # 10006: ignoring unknown option -fno-signed-zeros
4655     # 10148: ignoring unknown option -Wno-parentheses
4656     # 10156: ignoring option '-W'; no argument required
4657     check_cflags -wd144,167,556,1292,1419,10006,10148,10156
4658     # 11030: Warning unknown option --as-needed
4659     # 10156: ignoring option '-export'; no argument required
4660     check_ldflags -wd10156,11030
4661     # icc 11.0 and 11.1 work with ebp_available, but don't pass the test
4662     enable ebp_available
4663     if enabled x86_32; then
4664         icc_version=$($cc -dumpversion)
4665         test ${icc_version%%.*} -ge 11 &&
4666             check_cflags -falign-stack=maintain-16-byte ||
4667             disable aligned_stack
4668     fi
4669 elif enabled ccc; then
4670     # disable some annoying warnings
4671     add_cflags -msg_disable bitnotint
4672     add_cflags -msg_disable mixfuncvoid
4673     add_cflags -msg_disable nonstandcast
4674     add_cflags -msg_disable unsupieee
4675 elif enabled gcc; then
4676     check_optflags -fno-tree-vectorize
4677     check_cflags -Werror=implicit-function-declaration
4678     check_cflags -Werror=missing-prototypes
4679     check_cflags -Werror=return-type
4680     check_cflags -Werror=declaration-after-statement
4681     check_cflags -Werror=vla
4682     check_cflags -Werror=format-security
4683     check_cflags -fdiagnostics-color=auto
4684     enabled extra_warnings || check_disable_warning -Wno-maybe-uninitialized
4685 elif enabled llvm_gcc; then
4686     check_cflags -mllvm -stack-alignment=16
4687 elif enabled clang; then
4688     check_cflags -mllvm -stack-alignment=16
4689     check_cflags -Qunused-arguments
4690     check_cflags -Werror=implicit-function-declaration
4691     check_cflags -Werror=missing-prototypes
4692     check_cflags -Werror=return-type
4693 elif enabled cparser; then
4694     add_cflags -Wno-missing-variable-declarations
4695     add_cflags -Wno-empty-statement
4696 elif enabled armcc; then
4697     add_cflags -W${armcc_opt},--diag_suppress=4343 # hardfp compat
4698     add_cflags -W${armcc_opt},--diag_suppress=3036 # using . as system include dir
4699     # 2523: use of inline assembly is deprecated
4700     add_cflags -W${armcc_opt},--diag_suppress=2523
4701     add_cflags -W${armcc_opt},--diag_suppress=1207
4702     add_cflags -W${armcc_opt},--diag_suppress=1293 # assignment in condition
4703     add_cflags -W${armcc_opt},--diag_suppress=3343 # hardfp compat
4704     add_cflags -W${armcc_opt},--diag_suppress=167  # pointer sign
4705     add_cflags -W${armcc_opt},--diag_suppress=513  # pointer sign
4706 elif enabled tms470; then
4707     add_cflags -pds=824 -pds=837
4708     disable inline_asm
4709 elif enabled pathscale; then
4710     add_cflags -fstrict-overflow -OPT:wrap_around_unsafe_opt=OFF
4711 elif enabled_any msvc icl; then
4712     enabled x86_32 && disable aligned_stack
4713     enabled_all x86_32 debug && add_cflags -Oy-
4714     enabled debug && add_ldflags -debug
4715     enable pragma_deprecated
4716     if enabled icl; then
4717         # -Qansi-alias is basically -fstrict-aliasing, but does not work
4718         # (correctly) on icl 13.x.
4719         check_cpp_condition "windows.h" "__ICL < 1300 || __ICL >= 1400" &&
4720             add_cflags -Qansi-alias
4721         # icl will pass the inline asm tests but inline asm is currently
4722         # not supported (build will fail)
4723         disable inline_asm
4724     fi
4725     # msvcrt10 x64 incorrectly enables log2, only msvcrt12 (MSVC 2013) onwards actually has log2.
4726     check_cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION >= 12" || disable log2
4727     # The CRT headers contain __declspec(restrict) in a few places, but if redefining
4728     # restrict, this might break. MSVC 2010 and 2012 fail with __declspec(__restrict)
4729     # (as it ends up if the restrict redefine is done before including stdlib.h), while
4730     # MSVC 2013 and newer can handle it fine.
4731     # If this declspec fails, force including stdlib.h before the restrict redefinition
4732     # happens in config.h.
4733     if [ $_restrict != restrict ]; then
4734         check_cc <<EOF || add_cflags -FIstdlib.h
4735 __declspec($_restrict) void* foo(int);
4736 EOF
4737     fi
4738     check_func strtoll || add_cflags -Dstrtoll=_strtoi64
4739 fi
4740
4741 for pfx in "" host_; do
4742     varname=${pfx%_}cc_type
4743     eval "type=\$$varname"
4744     if [ $type = "msvc" ]; then
4745         check_${pfx}cc <<EOF || add_${pfx}cflags -Dinline=__inline
4746 static inline int foo(int a) { return a; }
4747 EOF
4748     fi
4749 done
4750
4751 case $as_type in
4752     clang)
4753         add_asflags -Qunused-arguments
4754     ;;
4755 esac
4756
4757 case $ld_type in
4758     clang)
4759         check_ldflags -Qunused-arguments
4760     ;;
4761 esac
4762
4763 case $target_os in
4764     osf1)
4765         enabled ccc && add_ldflags '-Wl,-expect_unresolved,*'
4766     ;;
4767     plan9)
4768         add_cppflags -Dmain=plan9_main
4769     ;;
4770 esac
4771
4772 enabled asm || { arch=c; disable $ARCH_LIST $ARCH_EXT_LIST; }
4773
4774 check_deps $CONFIG_LIST       \
4775            $CONFIG_EXTRA      \
4776            $HAVE_LIST         \
4777            $ALL_COMPONENTS    \
4778
4779 enabled_all dxva2 CoTaskMemFree &&
4780     prepend avconv_libs $($ldflags_filter "-lole32") &&
4781     enable dxva2_lib
4782
4783 ! enabled_any memalign posix_memalign aligned_malloc &&
4784     enabled simd_align_16 && enable memalign_hack
4785
4786 map 'enabled $v && intrinsics=${v#intrinsics_}' $INTRINSICS_LIST
4787
4788 for thread in $THREADS_LIST; do
4789     if enabled $thread; then
4790         test -n "$thread_type" &&
4791             die "ERROR: Only one thread type must be selected." ||
4792             thread_type="$thread"
4793     fi
4794 done
4795
4796 enabled zlib && add_cppflags -DZLIB_CONST
4797
4798 # conditional library dependencies, in linking order
4799 enabled movie_filter    && prepend avfilter_deps "avformat avcodec"
4800 enabled resample_filter && prepend avfilter_deps "avresample"
4801 enabled scale_filter    && prepend avfilter_deps "swscale"
4802
4803 enabled opus_decoder    && prepend avcodec_deps "avresample"