svq3: drop the build dependency on the h264 decoder
[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-cuda            enable dynamically linked CUDA [no]
183   --enable-frei0r          enable frei0r video filtering
184   --enable-gnutls          enable gnutls [no]
185   --enable-libbs2b         enable bs2b DSP library [no]
186   --enable-libcdio         enable audio CD grabbing with libcdio
187   --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394
188                            and libraw1394 [no]
189   --enable-libdcadec       enable DCA decoding via libdcadec [no]
190   --enable-libfaac         enable AAC encoding via libfaac [no]
191   --enable-libfdk-aac      enable AAC de/encoding via libfdk-aac [no]
192   --enable-libfreetype     enable libfreetype [no]
193   --enable-libgsm          enable GSM de/encoding via libgsm [no]
194   --enable-libilbc         enable iLBC de/encoding via libilbc [no]
195   --enable-libkvazaar      enable HEVC encoding via libkvazaar [no]
196   --enable-libmfx          enable HW acceleration through libmfx
197   --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
198   --enable-libnpp          enable NVIDIA Performance Primitives-based code [no]
199   --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
200   --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
201   --enable-libopencv       enable video filtering via libopencv [no]
202   --enable-libopenh264     enable H.264 encoding via OpenH264 [no]
203   --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]
204   --enable-libopus         enable Opus de/encoding via libopus [no]
205   --enable-libpulse        enable Pulseaudio input via libpulse [no]
206   --enable-librtmp         enable RTMP[E] support via librtmp [no]
207   --enable-libschroedinger enable Dirac de/encoding via libschroedinger [no]
208   --enable-libsnappy       enable Snappy compression [no]
209   --enable-libspeex        enable Speex de/encoding via libspeex [no]
210   --enable-libtheora       enable Theora encoding via libtheora [no]
211   --enable-libtwolame      enable MP2 encoding via libtwolame [no]
212   --enable-libvo-aacenc    enable AAC encoding via libvo-aacenc [no]
213   --enable-libvo-amrwbenc  enable AMR-WB encoding via libvo-amrwbenc [no]
214   --enable-libvorbis       enable Vorbis encoding via libvorbis [no]
215   --enable-libvpx          enable VP8 and VP9 de/encoding via libvpx [no]
216   --enable-libwavpack      enable wavpack encoding via libwavpack [no]
217   --enable-libwebp         enable WebP encoding via libwebp [no]
218   --enable-libx264         enable H.264 encoding via x264 [no]
219   --enable-libx265         enable HEVC encoding via x265 [no]
220   --enable-libxavs         enable AVS encoding via xavs [no]
221   --enable-libxcb          enable X11 grabbing using XCB [no]
222   --enable-libxcb-shm      enable X11 grabbing shm communication [auto]
223   --enable-libxcb-xfixes   enable X11 grabbing mouse rendering [auto]
224   --enable-libxvid         enable Xvid encoding via xvidcore,
225                            native MPEG-4/Xvid encoder exists [no]
226   --enable-mmal            enable decoding via MMAL [no]
227   --enable-nvenc           enable encoding via NVENC [no]
228   --enable-openssl         enable openssl [no]
229   --enable-x11grab         enable X11 grabbing (legacy) [no]
230   --enable-zlib            enable zlib [autodetect]
231
232 Toolchain options:
233   --arch=ARCH              select architecture [$arch]
234   --cpu=CPU                select the minimum required CPU (affects
235                            instruction selection, may crash on older CPUs)
236   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
237   --enable-cross-compile   assume a cross-compiler is used
238   --sysroot=PATH           root of cross-build tree
239   --sysinclude=PATH        location of cross-build system headers
240   --target-os=OS           compiler targets OS [$target_os]
241   --target-exec=CMD        command to run executables on target
242   --target-path=DIR        path to view of build directory on target
243   --target-samples=DIR     path to samples directory on target
244   --toolchain=NAME         set tool defaults according to NAME
245   --nm=NM                  use nm tool
246   --ar=AR                  use archive tool AR [$ar_default]
247   --as=AS                  use assembler AS [$as_default]
248   --cc=CC                  use C compiler CC [$cc_default]
249   --objcc=OCC              use ObjC compiler OCC [$cc_default]
250   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
251   --ld=LD                  use linker LD
252   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
253   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
254   --host-cc=HOSTCC         use host C compiler HOSTCC
255   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
256   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
257   --host-ld=HOSTLD         use host linker HOSTLD
258   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
259   --host-libs=HLIBS        use libs HLIBS when linking for host
260   --host-os=OS             compiler host OS [$target_os]
261   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
262   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
263   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
264   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
265   --extra-libs=ELIBS       add ELIBS [$ELIBS]
266   --extra-version=STRING   version string suffix []
267   --optflags=OPTFLAGS      override optimization-related compiler flags
268   --build-suffix=SUFFIX    library name suffix []
269   --enable-pic             build position-independent code
270   --enable-thumb           compile for Thumb instruction set
271   --enable-lto             use link-time optimization
272   --env="ENV=override"     override the environment variables
273
274 Advanced options (experts only):
275   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
276   --custom-allocator=NAME  use a supported custom allocator
277   --disable-symver         disable symbol versioning
278   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
279   --disable-safe-bitstream-reader
280                            disable buffer boundary checking in bitreaders
281                            (faster, but may crash)
282   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
283   --enable-sram            allow use of on-chip SRAM
284
285 Optimization options (experts only):
286   --disable-asm            disable all assembly optimizations
287   --disable-altivec        disable AltiVec optimizations
288   --disable-vsx            disable VSX optimizations
289   --disable-power8         disable POWER8 optimizations
290   --disable-amd3dnow       disable 3DNow! optimizations
291   --disable-amd3dnowext    disable 3DNow! extended optimizations
292   --disable-mmx            disable MMX optimizations
293   --disable-mmxext         disable MMXEXT optimizations
294   --disable-sse            disable SSE optimizations
295   --disable-sse2           disable SSE2 optimizations
296   --disable-sse3           disable SSE3 optimizations
297   --disable-ssse3          disable SSSE3 optimizations
298   --disable-sse4           disable SSE4 optimizations
299   --disable-sse42          disable SSE4.2 optimizations
300   --disable-avx            disable AVX optimizations
301   --disable-xop            disable XOP optimizations
302   --disable-fma3           disable FMA3 optimizations
303   --disable-fma4           disable FMA4 optimizations
304   --disable-avx2           disable AVX2 optimizations
305   --disable-armv5te        disable armv5te optimizations
306   --disable-armv6          disable armv6 optimizations
307   --disable-armv6t2        disable armv6t2 optimizations
308   --disable-vfp            disable VFP optimizations
309   --disable-neon           disable NEON optimizations
310   --disable-inline-asm     disable use of inline assembly
311   --disable-yasm           disable use of nasm/yasm assembly
312
313 Developer options (useful when working on Libav itself):
314   --disable-debug          disable debugging symbols
315   --enable-debug=LEVEL     set the debug level [$debuglevel]
316   --disable-optimizations  disable compiler optimizations
317   --enable-extra-warnings  enable more compiler warnings
318   --samples=PATH           location of test samples for FATE, if not set use
319                            \$LIBAV_SAMPLES at make invocation time.
320   --enable-neon-clobber-test check NEON registers for clobbering (should be
321                            used only for debugging purposes)
322   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
323                            should be used only for debugging purposes)
324   --enable-random          randomly enable/disable components
325   --disable-random
326   --enable-random=LIST     randomly enable/disable specific components or
327   --disable-random=LIST    component groups. LIST is a comma-separated list
328                            of NAME[:PROB] entries where NAME is a component
329                            (group) and PROB the probability associated with
330                            NAME (default 0.5).
331   --random-seed=VALUE      seed value for --enable/disable-random
332   --disable-valgrind-backtrace do not print a backtrace under Valgrind
333                            (only applies to --disable-optimizations builds)
334
335 NOTE: Object files are built at the place where configure is launched.
336 EOF
337   exit 0
338 }
339
340 quotes='""'
341
342 log(){
343     echo "$@" >> $logfile
344 }
345
346 log_file(){
347     log BEGIN $1
348     i=1
349     while read line; do
350         printf '%5s   %s\n' "${i}" "${line}"
351         i=$(($i+1))
352     done < $1 >> $logfile
353     log END $1
354 }
355
356 echolog(){
357     log "$@"
358     echo "$@"
359 }
360
361 warn(){
362     log "WARNING: $*"
363     WARNINGS="${WARNINGS}WARNING: $*\n"
364 }
365
366 die(){
367     echolog "$@"
368     cat <<EOF
369
370 If you think configure made a mistake, make sure you are using the latest
371 version from Git.  If the latest version fails, report the problem to the
372 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
373 EOF
374     if disabled logging; then
375         cat <<EOF
376 Rerun configure with logging enabled (do not use --disable-logging), and
377 include the log this produces with your report.
378 EOF
379     else
380         cat <<EOF
381 Include the log file "$logfile" produced by configure as this will help
382 solving the problem.
383 EOF
384     fi
385     exit 1
386 }
387
388 # Avoid locale weirdness, besides we really just want to translate ASCII.
389 toupper(){
390     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
391 }
392
393 tolower(){
394     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
395 }
396
397 c_escape(){
398     echo "$*" | sed 's/["\\]/\\\0/g'
399 }
400
401 sh_quote(){
402     v=$(echo "$1" | sed "s/'/'\\\\''/g")
403     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
404     echo "$v"
405 }
406
407 cleanws(){
408     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
409 }
410
411 filter(){
412     pat=$1
413     shift
414     for v; do
415         eval "case $v in $pat) echo $v ;; esac"
416     done
417 }
418
419 filter_out(){
420     pat=$1
421     shift
422     for v; do
423         eval "case $v in $pat) ;; *) echo $v ;; esac"
424     done
425 }
426
427 map(){
428     m=$1
429     shift
430     for v; do eval $m; done
431 }
432
433 add_suffix(){
434     suffix=$1
435     shift
436     for v; do echo ${v}${suffix}; done
437 }
438
439 set_all(){
440     value=$1
441     shift
442     for var in $*; do
443         eval $var=$value
444     done
445 }
446
447 set_weak(){
448     value=$1
449     shift
450     for var; do
451         eval : \${$var:=$value}
452     done
453 }
454
455 sanitize_var_name(){
456     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
457 }
458
459 set_safe(){
460     var=$1
461     shift
462     eval $(sanitize_var_name "$var")='$*'
463 }
464
465 get_safe(){
466     eval echo \$$(sanitize_var_name "$1")
467 }
468
469 pushvar(){
470     for pvar in $*; do
471         eval level=\${${pvar}_level:=0}
472         eval ${pvar}_${level}="\$$pvar"
473         eval ${pvar}_level=$(($level+1))
474     done
475 }
476
477 popvar(){
478     for pvar in $*; do
479         eval level=\${${pvar}_level:-0}
480         test $level = 0 && continue
481         eval level=$(($level-1))
482         eval $pvar="\${${pvar}_${level}}"
483         eval ${pvar}_level=$level
484         eval unset ${pvar}_${level}
485     done
486 }
487
488 enable(){
489     set_all yes $*
490 }
491
492 disable(){
493     set_all no $*
494 }
495
496 enable_weak(){
497     set_weak yes $*
498 }
499
500 disable_weak(){
501     set_weak no $*
502 }
503
504 enable_safe(){
505     for var; do
506         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
507     done
508 }
509
510 disable_safe(){
511     for var; do
512         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
513     done
514 }
515
516 do_enable_deep(){
517     for var; do
518         enabled $var && continue
519         eval sel="\$${var}_select"
520         eval sgs="\$${var}_suggest"
521         pushvar var sgs
522         enable_deep $sel
523         popvar sgs
524         enable_deep_weak $sgs
525         popvar var
526     done
527 }
528
529 enable_deep(){
530     do_enable_deep $*
531     enable $*
532 }
533
534 enable_deep_weak(){
535     for var; do
536         disabled $var && continue
537         pushvar var
538         do_enable_deep $var
539         popvar var
540         enable_weak $var
541     done
542 }
543
544 enabled(){
545     test "${1#!}" = "$1" && op== || op=!=
546     eval test "x\$${1#!}" $op "xyes"
547 }
548
549 disabled(){
550     test "${1#!}" = "$1" && op== || op=!=
551     eval test "x\$${1#!}" $op "xno"
552 }
553
554 enabled_all(){
555     for opt; do
556         enabled $opt || return 1
557     done
558 }
559
560 disabled_all(){
561     for opt; do
562         disabled $opt || return 1
563     done
564 }
565
566 enabled_any(){
567     for opt; do
568         enabled $opt && return 0
569     done
570 }
571
572 disabled_any(){
573     for opt; do
574         disabled $opt && return 0
575     done
576     return 1
577 }
578
579 set_default(){
580     for opt; do
581         eval : \${$opt:=\$${opt}_default}
582     done
583 }
584
585 is_in(){
586     value=$1
587     shift
588     for var in $*; do
589         [ $var = $value ] && return 0
590     done
591     return 1
592 }
593
594 do_check_deps(){
595     for cfg; do
596         cfg="${cfg#!}"
597         enabled ${cfg}_checking && die "Circular dependency for $cfg."
598         disabled ${cfg}_checking && continue
599         enable ${cfg}_checking
600         append allopts $cfg
601
602         eval dep_all="\$${cfg}_deps"
603         eval dep_any="\$${cfg}_deps_any"
604         eval dep_sel="\$${cfg}_select"
605         eval dep_sgs="\$${cfg}_suggest"
606         eval dep_ifa="\$${cfg}_if"
607         eval dep_ifn="\$${cfg}_if_any"
608
609         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
610         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
611         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
612
613         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
614         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
615         enabled_all  $dep_all || disable $cfg
616         enabled_any  $dep_any || disable $cfg
617         disabled_any $dep_sel && disable $cfg
618
619         if enabled $cfg; then
620             enable_deep $dep_sel
621             enable_deep_weak $dep_sgs
622         fi
623
624         disable ${cfg}_checking
625     done
626 }
627
628 check_deps(){
629     unset allopts
630
631     do_check_deps "$@"
632
633     for cfg in $allopts; do
634         enabled $cfg || continue
635         eval dep_extralibs="\$${cfg}_extralibs"
636         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
637     done
638 }
639
640 print_config(){
641     pfx=$1
642     files=$2
643     shift 2
644     map 'eval echo "$v \${$v:-no}"' "$@" |
645     awk "BEGIN { split(\"$files\", files) }
646         {
647             c = \"$pfx\" toupper(\$1);
648             v = \$2;
649             sub(/yes/, 1, v);
650             sub(/no/,  0, v);
651             for (f in files) {
652                 file = files[f];
653                 if (file ~ /\\.h\$/) {
654                     printf(\"#define %s %d\\n\", c, v) >>file;
655                 } else if (file ~ /\\.asm\$/) {
656                     printf(\"%%define %s %d\\n\", c, v) >>file;
657                 } else if (file ~ /\\.mak\$/) {
658                     n = -v ? \"\" : \"!\";
659                     printf(\"%s%s=yes\\n\", n, c) >>file;
660                 }
661             }
662         }"
663 }
664
665 print_enabled(){
666     suf=$1
667     shift
668     for v; do
669         enabled $v && printf "%s\n" ${v%$suf};
670     done
671 }
672
673 append(){
674     var=$1
675     shift
676     eval "$var=\"\$$var $*\""
677 }
678
679 prepend(){
680     var=$1
681     shift
682     eval "$var=\"$* \$$var\""
683 }
684
685 unique(){
686     var=$1
687     uniq_list=""
688     for tok in $(eval echo \$$var); do
689         uniq_list="$(filter_out $tok $uniq_list) $tok"
690     done
691     eval "$var=\"${uniq_list}\""
692 }
693
694 add_cppflags(){
695     append CPPFLAGS "$@"
696 }
697
698 add_cflags(){
699     append CFLAGS $($cflags_filter "$@")
700 }
701
702 add_asflags(){
703     append ASFLAGS $($asflags_filter "$@")
704 }
705
706 add_objcflags(){
707     append OBJCFLAGS $($objcflags_filter "$@")
708 }
709
710 add_ldflags(){
711     append LDFLAGS $($ldflags_filter "$@")
712 }
713
714 add_ldexeflags(){
715     append LDEXEFLAGS $($ldflags_filter "$@")
716 }
717
718 add_stripflags(){
719     append STRIPFLAGS "$@"
720 }
721
722 add_extralibs(){
723     prepend extralibs $($ldflags_filter "$@")
724 }
725
726 add_host_cppflags(){
727     append host_cppflags "$@"
728 }
729
730 add_host_cflags(){
731     append host_cflags $($host_cflags_filter "$@")
732 }
733
734 add_host_ldflags(){
735     append host_ldflags $($host_ldflags_filter "$@")
736 }
737
738 add_compat(){
739     append compat_objs $1
740     shift
741     map 'add_cppflags -D$v' "$@"
742 }
743
744 check_cmd(){
745     log "$@"
746     "$@" >> $logfile 2>&1
747 }
748
749 cc_o(){
750     eval printf '%s\\n' $CC_O
751 }
752
753 cc_e(){
754     eval printf '%s\\n' $CC_E
755 }
756
757 check_cc(){
758     log check_cc "$@"
759     cat > $TMPC
760     log_file $TMPC
761     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
762 }
763
764 check_objcc(){
765     log check_objcc "$@"
766     cat > $TMPC
767     log_file $TMPC
768     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
769 }
770
771 check_cpp(){
772     log check_cpp "$@"
773     cat > $TMPC
774     log_file $TMPC
775     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
776 }
777
778 as_o(){
779     eval printf '%s\\n' $AS_O
780 }
781
782 check_as(){
783     log check_as "$@"
784     cat > $TMPS
785     log_file $TMPS
786     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
787 }
788
789 check_inline_asm(){
790     log check_inline_asm "$@"
791     name="$1"
792     code="$2"
793     shift 2
794     disable $name
795     check_cc "$@" <<EOF && enable $name
796 void foo(void){ __asm__ volatile($code); }
797 EOF
798 }
799
800 check_insn(){
801     log check_insn "$@"
802     check_inline_asm ${1}_inline "\"$2\""
803     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
804 }
805
806 check_yasm(){
807     log check_yasm "$@"
808     echo "$1" > $TMPS
809     log_file $TMPS
810     shift 1
811     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
812 }
813
814 ld_o(){
815     eval printf '%s\\n' $LD_O
816 }
817
818 check_ld(){
819     log check_ld "$@"
820     flags=$(filter_out '-l*' "$@")
821     libs=$(filter '-l*' "$@")
822     check_cc $($cflags_filter $flags) || return
823     flags=$($ldflags_filter $flags)
824     libs=$($ldflags_filter $libs)
825     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
826 }
827
828 print_include(){
829     hdr=$1
830     test "${hdr%.h}" = "${hdr}" &&
831         echo "#include $hdr"    ||
832         echo "#include <$hdr>"
833 }
834
835 check_code(){
836     log check_code "$@"
837     check=$1
838     headers=$2
839     code=$3
840     shift 3
841     {
842         for hdr in $headers; do
843             print_include $hdr
844         done
845         echo "int main(void) { $code; return 0; }"
846     } | check_$check "$@"
847 }
848
849 check_cppflags(){
850     log check_cppflags "$@"
851     check_cc "$@" <<EOF && append CPPFLAGS "$@"
852 int x;
853 EOF
854 }
855
856 test_cflags(){
857     log test_cflags "$@"
858     set -- $($cflags_filter "$@")
859     check_cc "$@" <<EOF
860 int x;
861 EOF
862 }
863
864 check_cflags(){
865     log check_cflags "$@"
866     test_cflags "$@" && add_cflags "$@"
867 }
868
869 test_objcflags(){
870     log test_cflags "$@"
871     set -- $($cflags_filter "$@")
872     check_objcc "$@" <<EOF
873 int x;
874 EOF
875 }
876
877 check_objcflags(){
878     log check_cflags "$@"
879     test_objcflags "$@" && add_objcflags "$@"
880 }
881
882 test_ldflags(){
883     log test_ldflags "$@"
884     check_ld "$@" <<EOF
885 int main(void){ return 0; }
886 EOF
887 }
888
889 check_ldflags(){
890     log check_ldflags "$@"
891     test_ldflags "$@" && add_ldflags "$@"
892 }
893
894 test_stripflags(){
895     log test_stripflags "$@"
896     # call check_cc to get a fresh TMPO
897     check_cc <<EOF
898 int main(void) { return 0; }
899 EOF
900     check_cmd $strip $STRIPFLAGS "$@" $TMPO
901 }
902
903 check_stripflags(){
904     log check_stripflags "$@"
905     test_stripflags "$@" && add_stripflags "$@"
906 }
907
908 check_header(){
909     log check_header "$@"
910     header=$1
911     shift
912     disable_safe $header
913     check_cpp "$@" <<EOF && enable_safe $header
914 #include <$header>
915 int x;
916 EOF
917 }
918
919 check_func(){
920     log check_func "$@"
921     func=$1
922     shift
923     disable $func
924     check_ld "$@" <<EOF && enable $func
925 extern int $func();
926 int main(void){ $func(); }
927 EOF
928 }
929
930 check_mathfunc(){
931     log check_mathfunc "$@"
932     func=$1
933     narg=$2
934     shift 2
935     test $narg = 2 && args="f, g" || args="f"
936     disable $func
937     check_ld "$@" <<EOF && enable $func
938 #include <math.h>
939 float foo(float f, float g) { return $func($args); }
940 int main(void){ return 0; }
941 EOF
942 }
943
944 check_func_headers(){
945     log check_func_headers "$@"
946     headers=$1
947     funcs=$2
948     shift 2
949     {
950         for hdr in $headers; do
951             print_include $hdr
952         done
953         for func in $funcs; do
954             echo "long check_$func(void) { return (long) $func; }"
955         done
956         echo "int main(void) { return 0; }"
957     } | check_ld "$@" && enable $funcs && enable_safe $headers
958 }
959
960 check_cpp_condition(){
961     log check_cpp_condition "$@"
962     header=$1
963     condition=$2
964     shift 2
965     check_cpp "$@" <<EOF
966 #include <$header>
967 #if !($condition)
968 #error "unsatisfied condition: $condition"
969 #endif
970 EOF
971 }
972
973 check_lib(){
974     log check_lib "$@"
975     header="$1"
976     func="$2"
977     shift 2
978     check_header $header && check_func $func "$@" && add_extralibs "$@"
979 }
980
981 check_lib2(){
982     log check_lib2 "$@"
983     headers="$1"
984     funcs="$2"
985     shift 2
986     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
987 }
988
989 check_pkg_config(){
990     log check_pkg_config "$@"
991     pkg="$1"
992     headers="$2"
993     funcs="$3"
994     shift 3
995     check_cmd $pkg_config --exists --print-errors $pkg || return
996     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
997     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
998     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
999         set_safe "${pkg}_cflags" $pkg_cflags   &&
1000         set_safe "${pkg}_libs"   $pkg_libs
1001 }
1002
1003 check_exec(){
1004     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1005 }
1006
1007 check_exec_crash(){
1008     code=$(cat)
1009
1010     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1011     # are safe but may not be available everywhere.  Thus we use
1012     # raise(SIGTERM) instead.  The check is run in a subshell so we
1013     # can redirect the "Terminated" message from the shell.  SIGBUS
1014     # is not defined by standard C so it is used conditionally.
1015
1016     (check_exec "$@") >> $logfile 2>&1 <<EOF
1017 #include <signal.h>
1018 static void sighandler(int sig){
1019     raise(SIGTERM);
1020 }
1021 int foo(void){
1022     $code
1023 }
1024 int (*func_ptr)(void) = foo;
1025 int main(void){
1026     signal(SIGILL, sighandler);
1027     signal(SIGFPE, sighandler);
1028     signal(SIGSEGV, sighandler);
1029 #ifdef SIGBUS
1030     signal(SIGBUS, sighandler);
1031 #endif
1032     return func_ptr();
1033 }
1034 EOF
1035 }
1036
1037 check_type(){
1038     log check_type "$@"
1039     headers=$1
1040     type=$2
1041     shift 2
1042     disable_safe "$type"
1043     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1044 }
1045
1046 check_struct(){
1047     log check_struct "$@"
1048     headers=$1
1049     struct=$2
1050     member=$3
1051     shift 3
1052     disable_safe "${struct}_${member}"
1053     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1054         enable_safe "${struct}_${member}"
1055 }
1056
1057 check_builtin(){
1058     log check_builtin "$@"
1059     name=$1
1060     headers=$2
1061     builtin=$3
1062     shift 3
1063     disable "$name"
1064     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1065 }
1066
1067 check_compile_assert(){
1068     log check_compile_assert "$@"
1069     name=$1
1070     headers=$2
1071     condition=$3
1072     shift 3
1073     disable "$name"
1074     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1075 }
1076
1077 require(){
1078     name="$1"
1079     header="$2"
1080     func="$3"
1081     shift 3
1082     check_lib $header $func "$@" || die "ERROR: $name not found"
1083 }
1084
1085 require2(){
1086     name="$1"
1087     headers="$2"
1088     func="$3"
1089     shift 3
1090     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1091 }
1092
1093 require_pkg_config(){
1094     pkg="$1"
1095     check_pkg_config "$@" || die "ERROR: $pkg not found"
1096     add_cflags    $(get_safe "${pkg}_cflags")
1097     add_extralibs $(get_safe "${pkg}_libs")
1098 }
1099
1100 hostcc_e(){
1101     eval printf '%s\\n' $HOSTCC_E
1102 }
1103
1104 hostcc_o(){
1105     eval printf '%s\\n' $HOSTCC_O
1106 }
1107
1108 check_host_cc(){
1109     log check_host_cc "$@"
1110     cat > $TMPC
1111     log_file $TMPC
1112     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1113 }
1114
1115 check_host_cpp(){
1116     log check_host_cpp "$@"
1117     cat > $TMPC
1118     log_file $TMPC
1119     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1120 }
1121
1122 check_host_cppflags(){
1123     log check_host_cppflags "$@"
1124     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1125 int x;
1126 EOF
1127 }
1128
1129 check_host_cflags(){
1130     log check_host_cflags "$@"
1131     set -- $($host_cflags_filter "$@")
1132     check_host_cc "$@" <<EOF && append host_cflags "$@"
1133 int x;
1134 EOF
1135 }
1136
1137 check_host_cpp_condition(){
1138     log check_host_cpp_condition "$@"
1139     header=$1
1140     condition=$2
1141     shift 2
1142     check_host_cpp "$@" <<EOF
1143 #include <$header>
1144 #if !($condition)
1145 #error "unsatisfied condition: $condition"
1146 #endif
1147 EOF
1148 }
1149
1150 apply(){
1151     file=$1
1152     shift
1153     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1154 }
1155
1156 cp_if_changed(){
1157     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1158     mkdir -p "$(dirname $2)"
1159     $cp_f "$1" "$2"
1160 }
1161
1162 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1163 # system-dependent things.
1164
1165 AVCODEC_COMPONENTS="
1166     bsfs
1167     decoders
1168     encoders
1169     hwaccels
1170     parsers
1171 "
1172
1173 AVDEVICE_COMPONENTS="
1174     indevs
1175     outdevs
1176 "
1177 AVFILTER_COMPONENTS="
1178     filters
1179 "
1180 AVFORMAT_COMPONENTS="
1181     demuxers
1182     muxers
1183     protocols
1184 "
1185
1186 AVRESAMPLE_COMPONENTS=""
1187 AVUTIL_COMPONENTS=""
1188
1189 COMPONENT_LIST="
1190     $AVCODEC_COMPONENTS
1191     $AVDEVICE_COMPONENTS
1192     $AVFILTER_COMPONENTS
1193     $AVFORMAT_COMPONENTS
1194     $AVRESAMPLE_COMPONENTS
1195     $AVUTIL_COMPONENTS
1196 "
1197
1198 EXAMPLE_LIST="
1199     avcodec_example
1200     filter_audio_example
1201     metadata_example
1202     output_example
1203     qsvdec_example
1204     transcode_aac_example
1205 "
1206
1207 EXTERNAL_LIBRARY_LIST="
1208     avisynth
1209     bzlib
1210     cuda
1211     frei0r
1212     gnutls
1213     libbs2b
1214     libcdio
1215     libdc1394
1216     libdcadec
1217     libfaac
1218     libfdk_aac
1219     libfontconfig
1220     libfreetype
1221     libgsm
1222     libilbc
1223     libkvazaar
1224     libmfx
1225     libmp3lame
1226     libnpp
1227     libopencore_amrnb
1228     libopencore_amrwb
1229     libopencv
1230     libopenh264
1231     libopenjpeg
1232     libopus
1233     libpulse
1234     librtmp
1235     libschroedinger
1236     libsnappy
1237     libspeex
1238     libtheora
1239     libtwolame
1240     libvo_aacenc
1241     libvo_amrwbenc
1242     libvorbis
1243     libvpx
1244     libwavpack
1245     libwebp
1246     libx264
1247     libx265
1248     libxavs
1249     libxcb
1250     libxcb_shm
1251     libxcb_xfixes
1252     libxvid
1253     mmal
1254     nvenc
1255     openssl
1256     x11grab
1257     zlib
1258 "
1259
1260 FEATURE_LIST="
1261     gray
1262     hardcoded_tables
1263     runtime_cpudetect
1264     safe_bitstream_reader
1265     shared
1266     small
1267     sram
1268     static
1269     swscale_alpha
1270 "
1271
1272 HWACCEL_LIST="
1273     d3d11va
1274     dxva2
1275     vaapi
1276     vda
1277     vdpau
1278 "
1279
1280 LIBRARY_LIST="
1281     avcodec
1282     avdevice
1283     avfilter
1284     avformat
1285     avresample
1286     avutil
1287     swscale
1288 "
1289
1290 LICENSE_LIST="
1291     gpl
1292     nonfree
1293     version3
1294 "
1295
1296 PROGRAM_LIST="
1297     avconv
1298     avplay
1299     avprobe
1300 "
1301
1302 SUBSYSTEM_LIST="
1303     dct
1304     doc
1305     error_resilience
1306     faan
1307     fft
1308     lsp
1309     lzo
1310     mdct
1311     network
1312     rdft
1313 "
1314
1315 CONFIG_LIST="
1316     $COMPONENT_LIST
1317     $EXAMPLE_LIST
1318     $EXTERNAL_LIBRARY_LIST
1319     $FEATURE_LIST
1320     $HWACCEL_LIST
1321     $LICENSE_LIST
1322     $LIBRARY_LIST
1323     $PROGRAM_LIST
1324     $SUBSYSTEM_LIST
1325     memalign_hack
1326     neon_clobber_test
1327     pic
1328     pod2man
1329     texi2html
1330     thumb
1331     valgrind_backtrace
1332     xmm_clobber_test
1333 "
1334
1335 THREADS_LIST="
1336     pthreads
1337     w32threads
1338 "
1339
1340 ATOMICS_LIST="
1341     atomics_gcc
1342     atomics_suncc
1343     atomics_win32
1344 "
1345
1346 ARCH_LIST="
1347     aarch64
1348     alpha
1349     arm
1350     avr32
1351     avr32_ap
1352     avr32_uc
1353     bfin
1354     ia64
1355     m68k
1356     mips
1357     mips64
1358     parisc
1359     ppc
1360     ppc64
1361     s390
1362     sh4
1363     sparc
1364     sparc64
1365     tilegx
1366     tilepro
1367     tomi
1368     x86
1369     x86_32
1370     x86_64
1371 "
1372
1373 ARCH_EXT_LIST_ARM="
1374     armv5te
1375     armv6
1376     armv6t2
1377     armv8
1378     neon
1379     vfp
1380     vfpv3
1381 "
1382
1383 ARCH_EXT_LIST_X86_SIMD="
1384     amd3dnow
1385     amd3dnowext
1386     avx
1387     avx2
1388     fma3
1389     fma4
1390     mmx
1391     mmxext
1392     sse
1393     sse2
1394     sse3
1395     sse4
1396     sse42
1397     ssse3
1398     xop
1399 "
1400
1401 ARCH_EXT_LIST_PPC="
1402     altivec
1403     dcbzl
1404     ldbrx
1405     power8
1406     ppc4xx
1407     vsx
1408 "
1409
1410 ARCH_EXT_LIST_X86="
1411     $ARCH_EXT_LIST_X86_SIMD
1412     cpunop
1413     i686
1414 "
1415
1416 ARCH_EXT_LIST_MIPS="
1417     loongson
1418     mips32r1
1419     mips64r1
1420     mips32r2
1421     mips64r2
1422     mips32r6
1423     mips64r6
1424 "
1425
1426 ARCH_EXT_LIST="
1427     $ARCH_EXT_LIST_ARM
1428     $ARCH_EXT_LIST_MIPS
1429     $ARCH_EXT_LIST_PPC
1430     $ARCH_EXT_LIST_X86
1431     vis
1432 "
1433
1434 ARCH_FEATURES="
1435     aligned_stack
1436     fast_64bit
1437     fast_clz
1438     fast_cmov
1439     local_aligned_8
1440     local_aligned_16
1441     simd_align_16
1442 "
1443
1444 BUILTIN_LIST="
1445     atomic_cas_ptr
1446     machine_rw_barrier
1447     MemoryBarrier
1448     mm_empty
1449     rdtsc
1450     sync_val_compare_and_swap
1451 "
1452 HAVE_LIST_CMDLINE="
1453     inline_asm
1454     symver
1455     yasm
1456 "
1457
1458 HAVE_LIST_PUB="
1459     bigendian
1460     fast_unaligned
1461 "
1462
1463 HEADERS_LIST="
1464     AVFoundation_AVFoundation_h
1465     alsa_asoundlib_h
1466     altivec_h
1467     arpa_inet_h
1468     cdio_paranoia_h
1469     cdio_paranoia_paranoia_h
1470     dev_bktr_ioctl_bt848_h
1471     dev_bktr_ioctl_meteor_h
1472     dev_ic_bt8xx_h
1473     dev_video_bktr_ioctl_bt848_h
1474     dev_video_meteor_ioctl_meteor_h
1475     direct_h
1476     dlfcn_h
1477     d3d11_h
1478     dxva_h
1479     gsm_h
1480     io_h
1481     mach_mach_time_h
1482     machine_ioctl_bt848_h
1483     machine_ioctl_meteor_h
1484     malloc_h
1485     poll_h
1486     sndio_h
1487     soundcard_h
1488     sys_mman_h
1489     sys_param_h
1490     sys_resource_h
1491     sys_select_h
1492     sys_soundcard_h
1493     sys_time_h
1494     sys_un_h
1495     sys_videoio_h
1496     unistd_h
1497     valgrind_valgrind_h
1498     windows_h
1499     winsock2_h
1500 "
1501
1502 INTRINSICS_LIST="
1503     intrinsics_neon
1504 "
1505
1506 MATH_FUNCS="
1507     atanf
1508     atan2f
1509     cbrtf
1510     cosf
1511     exp2
1512     exp2f
1513     expf
1514     isinf
1515     isnan
1516     ldexpf
1517     llrint
1518     llrintf
1519     log2
1520     log2f
1521     log10f
1522     lrint
1523     lrintf
1524     powf
1525     rint
1526     round
1527     roundf
1528     sinf
1529     trunc
1530     truncf
1531 "
1532
1533 SYSTEM_FUNCS="
1534     aligned_malloc
1535     clock_gettime
1536     closesocket
1537     CommandLineToArgvW
1538     CoTaskMemFree
1539     CryptGenRandom
1540     dlopen
1541     fcntl
1542     flt_lim
1543     fork
1544     getaddrinfo
1545     gethrtime
1546     getopt
1547     GetProcessAffinityMask
1548     GetProcessMemoryInfo
1549     GetProcessTimes
1550     getrusage
1551     GetSystemTimeAsFileTime
1552     gettimeofday
1553     gmtime_r
1554     inet_aton
1555     isatty
1556     jack_port_get_latency_range
1557     LoadLibrary
1558     localtime_r
1559     mach_absolute_time
1560     MapViewOfFile
1561     memalign
1562     mkstemp
1563     mmap
1564     mprotect
1565     nanosleep
1566     posix_memalign
1567     sched_getaffinity
1568     SetConsoleTextAttribute
1569     setmode
1570     setrlimit
1571     Sleep
1572     strerror_r
1573     sysconf
1574     sysctl
1575     usleep
1576     VirtualAlloc
1577 "
1578
1579 TOOLCHAIN_FEATURES="
1580     as_dn_directive
1581     as_func
1582     as_object_arch
1583     asm_mod_q
1584     attribute_may_alias
1585     attribute_packed
1586     ebp_available
1587     ebx_available
1588     gnu_as
1589     ibm_asm
1590     inline_asm_labels
1591     pragma_deprecated
1592     symver_asm_label
1593     symver_gnu_asm
1594     vfp_args
1595     xform_asm
1596     xmm_clobbers
1597 "
1598
1599 TYPES_LIST="
1600     CONDITION_VARIABLE_Ptr
1601     socklen_t
1602     struct_addrinfo
1603     struct_group_source_req
1604     struct_ip_mreq_source
1605     struct_ipv6_mreq
1606     struct_pollfd
1607     struct_rusage_ru_maxrss
1608     struct_sockaddr_in6
1609     struct_sockaddr_sa_len
1610     struct_sockaddr_storage
1611     struct_v4l2_frmivalenum_discrete
1612 "
1613
1614 HAVE_LIST="
1615     $ARCH_EXT_LIST
1616     $(add_suffix _external $ARCH_EXT_LIST)
1617     $(add_suffix _inline   $ARCH_EXT_LIST)
1618     $ARCH_FEATURES
1619     $ATOMICS_LIST
1620     $BUILTIN_LIST
1621     $HAVE_LIST_CMDLINE
1622     $HAVE_LIST_PUB
1623     $HEADERS_LIST
1624     $INTRINSICS_LIST
1625     $MATH_FUNCS
1626     $SYSTEM_FUNCS
1627     $THREADS_LIST
1628     $TOOLCHAIN_FEATURES
1629     $TYPES_LIST
1630     atomics_native
1631     dos_paths
1632     dxva2_lib
1633     libc_msvcrt
1634     libdc1394_1
1635     libdc1394_2
1636     sdl
1637     section_data_rel_ro
1638     threads
1639     vaapi_x11
1640     vdpau_x11
1641     xlib
1642 "
1643
1644 # options emitted with CONFIG_ prefix but not available on the command line
1645 CONFIG_EXTRA="
1646     aandcttables
1647     ac3dsp
1648     audio_frame_queue
1649     audiodsp
1650     blockdsp
1651     bswapdsp
1652     cabac
1653     dirac_parse
1654     dvprofile
1655     faandct
1656     faanidct
1657     fdctdsp
1658     flacdsp
1659     fmtconvert
1660     g722dsp
1661     gcrypt
1662     gmp
1663     golomb
1664     gplv3
1665     h263dsp
1666     h264chroma
1667     h264dsp
1668     h264pred
1669     h264qpel
1670     hpeldsp
1671     huffman
1672     huffyuvdsp
1673     huffyuvencdsp
1674     idctdsp
1675     iirfilter
1676     imdct15
1677     intrax8
1678     iso_media
1679     ividsp
1680     jpegtables
1681     libx262
1682     lgplv3
1683     lpc
1684     lzf
1685     me_cmp
1686     mpeg_er
1687     mpegaudio
1688     mpegaudiodsp
1689     mpegvideo
1690     mpegvideoenc
1691     mss34dsp
1692     pixblockdsp
1693     qpeldsp
1694     qsv
1695     qsvdec
1696     qsvenc
1697     rangecoder
1698     riffdec
1699     riffenc
1700     rtpdec
1701     rtpenc_chain
1702     rv34dsp
1703     sinewin
1704     snappy
1705     srtp
1706     startcode
1707     texturedsp
1708     texturedspenc
1709     tpeldsp
1710     vc1dsp
1711     videodsp
1712     vp3dsp
1713     vp56dsp
1714     vp8dsp
1715     wma_freqs
1716     wmv2dsp
1717 "
1718
1719 CMDLINE_SELECT="
1720     $ARCH_EXT_LIST
1721     $CONFIG_LIST
1722     $HAVE_LIST_CMDLINE
1723     $THREADS_LIST
1724     asm
1725     cross_compile
1726     debug
1727     extra_warnings
1728     logging
1729     lto
1730     optimizations
1731     rpath
1732 "
1733
1734 PATHS_LIST="
1735     bindir
1736     datadir
1737     docdir
1738     incdir
1739     libdir
1740     mandir
1741     prefix
1742     shlibdir
1743 "
1744
1745 CMDLINE_SET="
1746     $PATHS_LIST
1747     ar
1748     arch
1749     as
1750     build_suffix
1751     cc
1752     objcc
1753     cpu
1754     cross_prefix
1755     custom_allocator
1756     dep_cc
1757     env
1758     extra_version
1759     host_cc
1760     host_cflags
1761     host_ld
1762     host_ldflags
1763     host_libs
1764     host_os
1765     ld
1766     logfile
1767     malloc_prefix
1768     nm
1769     optflags
1770     pkg_config
1771     pkg_config_flags
1772     random_seed
1773     samples
1774     sysinclude
1775     sysroot
1776     target_exec
1777     target_os
1778     target_path
1779     target_samples
1780     toolchain
1781 "
1782
1783 CMDLINE_APPEND="
1784     extra_cflags
1785     extra_objcflags
1786     host_cppflags
1787 "
1788
1789 # code dependency declarations
1790
1791 # architecture extensions
1792
1793 armv5te_deps="arm"
1794 armv6_deps="arm"
1795 armv6t2_deps="arm"
1796 armv8_deps="aarch64"
1797 neon_deps_any="aarch64 arm"
1798 intrinsics_neon_deps="neon"
1799 vfp_deps_any="aarch64 arm"
1800 vfpv3_deps="vfp"
1801
1802 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1803
1804 altivec_deps="ppc"
1805 ppc4xx_deps="ppc"
1806 vsx_deps="altivec"
1807 power8_deps="vsx"
1808
1809 cpunop_deps="i686"
1810 x86_64_select="i686"
1811 x86_64_suggest="fast_cmov"
1812
1813 amd3dnow_deps="mmx"
1814 amd3dnowext_deps="amd3dnow"
1815 i686_deps="x86"
1816 mmx_deps="x86"
1817 mmxext_deps="mmx"
1818 sse_deps="mmxext"
1819 sse2_deps="sse"
1820 sse3_deps="sse2"
1821 ssse3_deps="sse3"
1822 sse4_deps="ssse3"
1823 sse42_deps="sse4"
1824 avx_deps="sse42"
1825 xop_deps="avx"
1826 fma3_deps="avx"
1827 fma4_deps="avx"
1828 avx2_deps="avx"
1829
1830 mmx_external_deps="yasm"
1831 mmx_inline_deps="inline_asm"
1832 mmx_suggest="mmx_external mmx_inline"
1833
1834 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1835     eval dep=\$${ext}_deps
1836     eval ${ext}_external_deps='"${dep}_external"'
1837     eval ${ext}_inline_deps='"${dep}_inline"'
1838     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1839 done
1840
1841 aligned_stack_if_any="aarch64 ppc x86"
1842 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1843 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1844 fast_unaligned_if_any="aarch64 ppc x86"
1845 simd_align_16_if_any="altivec neon sse"
1846
1847 # system capabilities
1848 symver_if_any="symver_asm_label symver_gnu_asm"
1849 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
1850
1851 # threading support
1852 atomics_gcc_if="sync_val_compare_and_swap"
1853 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1854 atomics_win32_if="MemoryBarrier"
1855 atomics_native_if_any="$ATOMICS_LIST"
1856 w32threads_deps="atomics_native"
1857 threads_if_any="$THREADS_LIST"
1858
1859 # subsystems
1860 dct_select="rdft"
1861 dirac_parse_select="golomb"
1862 error_resilience_select="me_cmp"
1863 faandct_deps="faan fdctdsp"
1864 faanidct_deps="faan idctdsp"
1865 h264dsp_select="startcode"
1866 intrax8_select="blockdsp idctdsp"
1867 mdct_select="fft"
1868 rdft_select="fft"
1869 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1870 mpeg_er_select="error_resilience"
1871 mpegaudio_select="mpegaudiodsp"
1872 mpegaudiodsp_select="dct"
1873 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp mpeg_er videodsp"
1874 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1875 nvenc_deps_any="dlopen LoadLibrary"
1876 nvenc_extralibs='$ldl'
1877 qsvdec_select="qsv"
1878 qsvenc_select="qsv"
1879 vc1dsp_select="h264chroma qpeldsp startcode"
1880
1881 # decoders / encoders
1882 aac_decoder_select="imdct15 mdct sinewin"
1883 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1884 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1885 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1886 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1887 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1888 adpcm_g722_decoder_select="g722dsp"
1889 adpcm_g722_encoder_select="g722dsp"
1890 aic_decoder_select="golomb idctdsp"
1891 alac_encoder_select="lpc"
1892 als_decoder_select="bswapdsp"
1893 amrnb_decoder_select="lsp"
1894 amrwb_decoder_select="lsp"
1895 amv_decoder_select="sp5x_decoder"
1896 ape_decoder_select="bswapdsp"
1897 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1898 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1899 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1900 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1901 atrac1_decoder_select="mdct sinewin"
1902 atrac3_decoder_select="mdct"
1903 atrac3p_decoder_select="mdct sinewin"
1904 bink_decoder_select="blockdsp hpeldsp"
1905 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1906 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1907 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1908 cllc_decoder_select="bswapdsp"
1909 comfortnoise_encoder_select="lpc"
1910 cook_decoder_select="audiodsp mdct sinewin"
1911 cscd_decoder_select="lzo"
1912 cscd_decoder_suggest="zlib"
1913 dca_decoder_select="fmtconvert mdct"
1914 dds_decoder_select="texturedsp"
1915 dnxhd_decoder_select="blockdsp idctdsp"
1916 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1917 dvvideo_decoder_select="dvprofile idctdsp"
1918 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1919 dxa_decoder_deps="zlib"
1920 dxv_decoder_select="lzf texturedsp"
1921 eac3_decoder_select="ac3_decoder"
1922 eac3_encoder_select="ac3_encoder"
1923 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1924 eatgq_decoder_select="aandcttables idctdsp"
1925 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
1926 exr_decoder_deps="zlib"
1927 ffv1_decoder_select="golomb rangecoder"
1928 ffv1_encoder_select="rangecoder"
1929 ffvhuff_decoder_select="huffyuv_decoder"
1930 ffvhuff_encoder_select="huffyuv_encoder"
1931 fic_decoder_select="golomb"
1932 flac_decoder_select="flacdsp golomb"
1933 flac_encoder_select="bswapdsp flacdsp golomb lpc"
1934 flashsv_decoder_deps="zlib"
1935 flashsv_encoder_deps="zlib"
1936 flashsv2_decoder_deps="zlib"
1937 flv_decoder_select="h263_decoder"
1938 flv_encoder_select="h263_encoder"
1939 fourxm_decoder_select="blockdsp bswapdsp"
1940 fraps_decoder_select="bswapdsp huffman"
1941 g2m_decoder_deps="zlib"
1942 g2m_decoder_select="blockdsp idctdsp jpegtables"
1943 h261_decoder_select="mpeg_er mpegvideo"
1944 h261_encoder_select="aandcttables mpegvideoenc"
1945 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
1946 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1947 h263i_decoder_select="h263_decoder"
1948 h263p_encoder_select="h263_encoder"
1949 h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel videodsp"
1950 h264_decoder_suggest="error_resilience"
1951 h264_nvenc_encoder_deps="nvenc"
1952 h264_qsv_decoder_deps="libmfx"
1953 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
1954 h264_qsv_encoder_deps="libmfx"
1955 h264_qsv_encoder_select="qsvenc"
1956 hap_decoder_select="snappy texturedsp"
1957 hap_encoder_deps="libsnappy"
1958 hap_encoder_select="texturedspenc"
1959 hevc_decoder_select="bswapdsp cabac golomb videodsp"
1960 hevc_nvenc_encoder_deps="nvenc"
1961 hevc_qsv_encoder_deps="libmfx"
1962 hevc_qsv_decoder_deps="libmfx"
1963 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser qsvdec hevc_qsv_hwaccel"
1964 hevc_qsv_encoder_select="qsvenc"
1965 huffyuv_decoder_select="bswapdsp huffyuvdsp"
1966 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
1967 iac_decoder_select="imc_decoder"
1968 imc_decoder_select="bswapdsp fft mdct sinewin"
1969 indeo3_decoder_select="hpeldsp"
1970 indeo4_decoder_select="ividsp"
1971 indeo5_decoder_select="ividsp"
1972 interplay_video_decoder_select="hpeldsp"
1973 jpegls_decoder_select="golomb mjpeg_decoder"
1974 jpegls_encoder_select="golomb"
1975 jv_decoder_select="blockdsp"
1976 lagarith_decoder_select="huffyuvdsp"
1977 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
1978 loco_decoder_select="golomb"
1979 mdec_decoder_select="blockdsp idctdsp mpegvideo"
1980 metasound_decoder_select="lsp mdct sinewin"
1981 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
1982 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
1983 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
1984 mjpegb_decoder_select="mjpeg_decoder"
1985 mlp_decoder_select="mlp_parser"
1986 motionpixels_decoder_select="bswapdsp"
1987 mp1_decoder_select="mpegaudio"
1988 mp1float_decoder_select="mpegaudio"
1989 mp2_decoder_select="mpegaudio"
1990 mp2float_decoder_select="mpegaudio"
1991 mp3_decoder_select="mpegaudio"
1992 mp3adu_decoder_select="mpegaudio"
1993 mp3adufloat_decoder_select="mpegaudio"
1994 mp3float_decoder_select="mpegaudio"
1995 mp3on4_decoder_select="mpegaudio"
1996 mp3on4float_decoder_select="mpegaudio"
1997 mpc7_decoder_select="bswapdsp mpegaudiodsp"
1998 mpc8_decoder_select="mpegaudiodsp"
1999 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2000 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2001 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2002 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2003 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2004 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2005 mpeg2_qsv_decoder_deps="libmfx"
2006 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2007 mpeg2_qsv_encoder_deps="libmfx"
2008 mpeg2_qsv_encoder_select="qsvenc"
2009 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2010 mpeg4_encoder_select="h263_encoder"
2011 msa1_decoder_select="mss34dsp"
2012 msmpeg4v1_decoder_select="h263_decoder"
2013 msmpeg4v2_decoder_select="h263_decoder"
2014 msmpeg4v2_encoder_select="h263_encoder"
2015 msmpeg4v3_decoder_select="h263_decoder"
2016 msmpeg4v3_encoder_select="h263_encoder"
2017 mss2_decoder_select="error_resilience mpeg_er mpegvideo vc1_decoder"
2018 mts2_decoder_select="mss34dsp"
2019 mxpeg_decoder_select="mjpeg_decoder"
2020 nellymoser_decoder_select="mdct sinewin"
2021 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2022 nuv_decoder_select="idctdsp lzo"
2023 nvenc_h264_encoder_deps="nvenc"
2024 nvenc_hevc_encoder_deps="nvenc"
2025 on2avc_decoder_select="mdct"
2026 opus_decoder_deps="avresample"
2027 opus_decoder_select="imdct15"
2028 png_decoder_deps="zlib"
2029 png_encoder_deps="zlib"
2030 png_encoder_select="huffyuvencdsp"
2031 prores_decoder_select="idctdsp"
2032 prores_encoder_select="fdctdsp"
2033 qcelp_decoder_select="lsp"
2034 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2035 ra_144_encoder_select="audio_frame_queue lpc"
2036 ralf_decoder_select="golomb"
2037 rscc_decoder_deps="zlib"
2038 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2039 rv10_encoder_select="h263_encoder"
2040 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2041 rv20_encoder_select="h263_encoder"
2042 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2043 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2044 screenpresso_decoder_deps="zlib"
2045 shorten_decoder_select="golomb"
2046 sipr_decoder_select="lsp"
2047 sp5x_decoder_select="mjpeg_decoder"
2048 svq1_decoder_select="hpeldsp"
2049 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2050 svq3_decoder_select="golomb h264dsp h264pred hpeldsp tpeldsp videodsp"
2051 svq3_decoder_suggest="zlib"
2052 tak_decoder_select="audiodsp"
2053 tdsc_decoder_deps="zlib"
2054 tdsc_decoder_select="mjpeg_decoder"
2055 theora_decoder_select="vp3_decoder"
2056 thp_decoder_select="mjpeg_decoder"
2057 tiff_decoder_suggest="zlib"
2058 tiff_encoder_suggest="zlib"
2059 truehd_decoder_select="mlp_decoder"
2060 truemotion2_decoder_select="bswapdsp"
2061 truespeech_decoder_select="bswapdsp"
2062 tscc_decoder_deps="zlib"
2063 txd_decoder_select="texturedsp"
2064 twinvq_decoder_select="mdct lsp sinewin"
2065 utvideo_decoder_select="bswapdsp"
2066 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2067 vble_decoder_select="huffyuvdsp"
2068 vc1_decoder_select="blockdsp error_resilience h263_decoder h264qpel intrax8 mpeg_er mpegvideo vc1dsp"
2069 vc1image_decoder_select="vc1_decoder"
2070 vorbis_decoder_select="mdct"
2071 vorbis_encoder_select="mdct"
2072 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2073 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2074 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2075 vp6a_decoder_select="vp6_decoder"
2076 vp6f_decoder_select="vp6_decoder"
2077 vp7_decoder_select="h264pred videodsp vp8dsp"
2078 vp8_decoder_select="h264pred videodsp vp8dsp"
2079 vp9_decoder_select="videodsp"
2080 webp_decoder_select="vp8_decoder"
2081 wmapro_decoder_select="mdct sinewin wma_freqs"
2082 wmav1_decoder_select="mdct sinewin wma_freqs"
2083 wmav1_encoder_select="mdct sinewin wma_freqs"
2084 wmav2_decoder_select="mdct sinewin wma_freqs"
2085 wmav2_encoder_select="mdct sinewin wma_freqs"
2086 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2087 wmv1_decoder_select="h263_decoder"
2088 wmv1_encoder_select="h263_encoder"
2089 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2090 wmv2_encoder_select="h263_encoder wmv2dsp"
2091 wmv3_decoder_select="vc1_decoder"
2092 wmv3image_decoder_select="wmv3_decoder"
2093 zerocodec_decoder_deps="zlib"
2094 zlib_decoder_deps="zlib"
2095 zlib_encoder_deps="zlib"
2096 zmbv_decoder_deps="zlib"
2097 zmbv_encoder_deps="zlib"
2098
2099 # hardware accelerators
2100 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2101 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2102 vaapi_deps="va_va_h"
2103 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2104 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2105 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2106
2107 h263_vaapi_hwaccel_deps="vaapi"
2108 h263_vaapi_hwaccel_select="h263_decoder"
2109 h264_d3d11va_hwaccel_deps="d3d11va"
2110 h264_d3d11va_hwaccel_select="h264_decoder"
2111 h264_dxva2_hwaccel_deps="dxva2"
2112 h264_dxva2_hwaccel_select="h264_decoder"
2113 h264_mmal_decoder_deps="mmal"
2114 h264_mmal_hwaccel_deps="mmal"
2115 h264_mmal_decoder_select="h264_decoder"
2116 h264_mmal_encoder_deps="mmal"
2117 h264_qsv_hwaccel_deps="libmfx"
2118 h264_vaapi_hwaccel_deps="vaapi"
2119 h264_vaapi_hwaccel_select="h264_decoder"
2120 h264_vda_hwaccel_deps="vda"
2121 h264_vda_hwaccel_select="h264_decoder"
2122 h264_vda_old_hwaccel_deps="vda"
2123 h264_vda_old_hwaccel_select="h264_decoder"
2124 h264_vdpau_hwaccel_deps="vdpau"
2125 h264_vdpau_hwaccel_select="h264_decoder"
2126 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2127 hevc_d3d11va_hwaccel_select="hevc_decoder"
2128 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2129 hevc_dxva2_hwaccel_select="hevc_decoder"
2130 hevc_qsv_hwaccel_deps="libmfx"
2131 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2132 hevc_vdpau_hwaccel_select="hevc_decoder"
2133 mpeg1_vdpau_hwaccel_deps="vdpau"
2134 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2135 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2136 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2137 mpeg2_dxva2_hwaccel_deps="dxva2"
2138 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2139 mpeg2_qsv_hwaccel_deps="libmfx"
2140 mpeg2_vaapi_hwaccel_deps="vaapi"
2141 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2142 mpeg2_vdpau_hwaccel_deps="vdpau"
2143 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2144 mpeg4_vaapi_hwaccel_deps="vaapi"
2145 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2146 mpeg4_vdpau_hwaccel_deps="vdpau"
2147 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2148 vc1_d3d11va_hwaccel_deps="d3d11va"
2149 vc1_d3d11va_hwaccel_select="vc1_decoder"
2150 vc1_dxva2_hwaccel_deps="dxva2"
2151 vc1_dxva2_hwaccel_select="vc1_decoder"
2152 vc1_vaapi_hwaccel_deps="vaapi"
2153 vc1_vaapi_hwaccel_select="vc1_decoder"
2154 vc1_vdpau_hwaccel_deps="vdpau"
2155 vc1_vdpau_hwaccel_select="vc1_decoder"
2156 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2157 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2158 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2159 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2160
2161 # parsers
2162 h264_parser_select="h264_decoder"
2163 hevc_parser_select="golomb"
2164 mpegvideo_parser_select="mpegvideo"
2165 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2166 vc1_parser_select="vc1dsp"
2167
2168 # bitstream_filters
2169 mjpeg2jpeg_bsf_select="jpegtables"
2170
2171 # external libraries
2172 libdcadec_decoder_deps="libdcadec"
2173 libfaac_encoder_deps="libfaac"
2174 libfaac_encoder_select="audio_frame_queue"
2175 libfdk_aac_decoder_deps="libfdk_aac"
2176 libfdk_aac_encoder_deps="libfdk_aac"
2177 libfdk_aac_encoder_select="audio_frame_queue"
2178 libgsm_decoder_deps="libgsm"
2179 libgsm_encoder_deps="libgsm"
2180 libgsm_ms_decoder_deps="libgsm"
2181 libgsm_ms_encoder_deps="libgsm"
2182 libilbc_decoder_deps="libilbc"
2183 libilbc_encoder_deps="libilbc"
2184 libkvazaar_encoder_deps="libkvazaar"
2185 libmp3lame_encoder_deps="libmp3lame"
2186 libmp3lame_encoder_select="audio_frame_queue"
2187 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2188 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2189 libopencore_amrnb_encoder_select="audio_frame_queue"
2190 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2191 libopenh264_encoder_deps="libopenh264"
2192 libopenjpeg_decoder_deps="libopenjpeg"
2193 libopenjpeg_encoder_deps="libopenjpeg"
2194 libopus_decoder_deps="libopus"
2195 libopus_encoder_deps="libopus"
2196 libopus_encoder_select="audio_frame_queue"
2197 libschroedinger_decoder_deps="libschroedinger"
2198 libschroedinger_encoder_deps="libschroedinger"
2199 libspeex_decoder_deps="libspeex"
2200 libspeex_encoder_deps="libspeex"
2201 libspeex_encoder_select="audio_frame_queue"
2202 libtheora_encoder_deps="libtheora"
2203 libtwolame_encoder_deps="libtwolame"
2204 libvo_aacenc_encoder_deps="libvo_aacenc"
2205 libvo_aacenc_encoder_select="audio_frame_queue"
2206 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2207 libvorbis_encoder_deps="libvorbis"
2208 libvorbis_encoder_select="audio_frame_queue"
2209 libvpx_vp8_decoder_deps="libvpx"
2210 libvpx_vp8_encoder_deps="libvpx"
2211 libvpx_vp9_decoder_deps="libvpx"
2212 libvpx_vp9_encoder_deps="libvpx"
2213 libwavpack_encoder_deps="libwavpack"
2214 libwebp_encoder_deps="libwebp"
2215 libx262_encoder_deps="libx262"
2216 libx264_encoder_deps="libx264"
2217 libx265_encoder_deps="libx265"
2218 libxavs_encoder_deps="libxavs"
2219 libxvid_encoder_deps="libxvid"
2220
2221 # demuxers / muxers
2222 ac3_demuxer_select="ac3_parser"
2223 asf_demuxer_select="riffdec"
2224 asf_muxer_select="riffenc"
2225 asf_stream_muxer_select="asf_muxer"
2226 avi_demuxer_select="iso_media riffdec"
2227 avi_muxer_select="riffenc"
2228 avisynth_demuxer_deps="avisynth"
2229 avisynth_demuxer_select="riffdec"
2230 caf_demuxer_select="iso_media riffdec"
2231 dash_muxer_select="mp4_muxer"
2232 dirac_demuxer_select="dirac_parser"
2233 dv_demuxer_select="dvprofile"
2234 dv_muxer_select="dvprofile"
2235 dxa_demuxer_select="riffdec"
2236 eac3_demuxer_select="ac3_parser"
2237 f4v_muxer_select="mov_muxer"
2238 flac_demuxer_select="flac_parser"
2239 hds_muxer_select="flv_muxer"
2240 hls_muxer_select="mpegts_muxer"
2241 ipod_muxer_select="mov_muxer"
2242 ismv_muxer_select="mov_muxer"
2243 matroska_audio_muxer_select="matroska_muxer"
2244 matroska_demuxer_select="iso_media riffdec"
2245 matroska_demuxer_suggest="bzlib lzo zlib"
2246 matroska_muxer_select="iso_media riffenc"
2247 mmf_muxer_select="riffenc"
2248 mov_demuxer_select="iso_media riffdec"
2249 mov_demuxer_suggest="zlib"
2250 mov_muxer_select="iso_media riffenc rtpenc_chain"
2251 mp3_demuxer_select="mpegaudio_parser"
2252 mp4_muxer_select="mov_muxer"
2253 mpegts_demuxer_select="iso_media"
2254 mpegts_muxer_select="adts_muxer latm_muxer"
2255 mpegtsraw_demuxer_select="mpegts_demuxer"
2256 mxf_d10_muxer_select="mxf_muxer"
2257 nut_muxer_select="riffenc"
2258 nuv_demuxer_select="riffdec"
2259 oga_muxer_select="ogg_muxer"
2260 ogg_demuxer_select="dirac_parse"
2261 opus_muxer_select="ogg_muxer"
2262 psp_muxer_select="mov_muxer"
2263 rtp_demuxer_select="sdp_demuxer"
2264 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2265 rtsp_demuxer_select="http_protocol rtpdec"
2266 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2267 sap_demuxer_select="sdp_demuxer"
2268 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2269 sdp_demuxer_select="rtpdec"
2270 smoothstreaming_muxer_select="ismv_muxer"
2271 spdif_muxer_select="aac_parser"
2272 spx_muxer_select="ogg_muxer"
2273 swf_demuxer_suggest="zlib"
2274 tak_demuxer_select="tak_parser"
2275 tg2_muxer_select="mov_muxer"
2276 tgp_muxer_select="mov_muxer"
2277 w64_demuxer_select="wav_demuxer"
2278 wav_demuxer_select="riffdec"
2279 wav_muxer_select="riffenc"
2280 webm_muxer_select="iso_media riffenc"
2281 webm_muxer_suggest="libopus_encoder libvorbis_encoder libvpx_vp8_encoder libvpx_vp9_encoder"
2282 wtv_demuxer_select="mpegts_demuxer riffdec"
2283 xmv_demuxer_select="riffdec"
2284 xwma_demuxer_select="riffdec"
2285
2286 # indevs / outdevs
2287 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2288 alsa_outdev_deps="alsa_asoundlib_h"
2289 avfoundation_indev_deps="AVFoundation_AVFoundation_h"
2290 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2291 dv1394_indev_deps="dv1394"
2292 dv1394_indev_select="dv_demuxer"
2293 fbdev_indev_deps="linux_fb_h"
2294 jack_indev_deps="jack_jack_h pthreads"
2295 libcdio_indev_deps="libcdio"
2296 libdc1394_indev_deps="libdc1394"
2297 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2298 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2299 pulse_indev_deps="libpulse"
2300 sndio_indev_deps="sndio_h"
2301 sndio_outdev_deps="sndio_h"
2302 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2303 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2304 vfwcap_indev_extralibs="-lavicap32"
2305 x11grab_indev_deps="x11grab"
2306 x11grab_xcb_indev_deps="libxcb"
2307
2308 # protocols
2309 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2310 ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
2311 ffrtmpcrypt_protocol_select="tcp_protocol"
2312 ffrtmphttp_protocol_deps="!librtmp_protocol"
2313 ffrtmphttp_protocol_select="http_protocol"
2314 gopher_protocol_select="network"
2315 http_protocol_select="tcp_protocol"
2316 httpproxy_protocol_select="tcp_protocol"
2317 https_protocol_select="tls_protocol"
2318 icecast_protocol_select="http_protocol"
2319 librtmp_protocol_deps="librtmp"
2320 librtmpe_protocol_deps="librtmp"
2321 librtmps_protocol_deps="librtmp"
2322 librtmpt_protocol_deps="librtmp"
2323 librtmpte_protocol_deps="librtmp"
2324 mmsh_protocol_select="http_protocol"
2325 mmst_protocol_select="network"
2326 rtmp_protocol_deps="!librtmp_protocol"
2327 rtmp_protocol_select="tcp_protocol"
2328 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2329 rtmps_protocol_deps="!librtmp_protocol"
2330 rtmps_protocol_select="tls_protocol"
2331 rtmpt_protocol_select="ffrtmphttp_protocol"
2332 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2333 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2334 rtp_protocol_select="udp_protocol"
2335 sctp_protocol_deps="struct_sctp_event_subscribe"
2336 sctp_protocol_select="network"
2337 srtp_protocol_select="rtp_protocol srtp"
2338 tcp_protocol_select="network"
2339 tls_gnutls_protocol_deps="gnutls"
2340 tls_gnutls_protocol_select="tcp_protocol"
2341 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
2342 tls_openssl_protocol_select="tcp_protocol"
2343 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2344 udp_protocol_select="network"
2345 unix_protocol_deps="sys_un_h"
2346 unix_protocol_select="network"
2347
2348 # filters
2349 blackframe_filter_deps="gpl"
2350 boxblur_filter_deps="gpl"
2351 bs2b_filter_deps="libbs2b"
2352 cropdetect_filter_deps="gpl"
2353 delogo_filter_deps="gpl"
2354 drawtext_filter_deps="libfreetype"
2355 frei0r_filter_deps="frei0r dlopen"
2356 frei0r_filter_extralibs='$ldl'
2357 frei0r_src_filter_deps="frei0r dlopen"
2358 frei0r_src_filter_extralibs='$ldl'
2359 hqdn3d_filter_deps="gpl"
2360 hwupload_cuda_filter_deps="cuda"
2361 interlace_filter_deps="gpl"
2362 ocv_filter_deps="libopencv"
2363 resample_filter_deps="avresample"
2364 scale_filter_deps="swscale"
2365 scale_npp_filter_deps="cuda libnpp"
2366 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2367
2368 # examples
2369 avcodec_example_deps="avcodec avutil"
2370 filter_audio_example_deps="avfilter avutil"
2371 metadata_example_deps="avformat avutil"
2372 output_example_deps="avcodec avformat avutil swscale"
2373 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder vaapi_x11"
2374 transcode_aac_example_deps="avcodec avformat avresample"
2375
2376 # libraries, in linking order
2377 avcodec_deps="avutil"
2378 avdevice_deps="avformat avcodec avutil"
2379 avfilter_deps="avutil"
2380 avformat_deps="avcodec avutil"
2381 avresample_deps="avutil"
2382 swscale_deps="avutil"
2383
2384 # programs
2385 avconv_deps="avcodec avfilter avformat avresample swscale"
2386 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2387                fps_filter null_filter resample_filter scale_filter
2388                setpts_filter trim_filter"
2389 avplay_deps="avcodec avfilter avformat avresample sdl"
2390 avplay_libs='$sdl_libs'
2391 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2392 avprobe_deps="avcodec avformat"
2393
2394 # documentation
2395 pod2man_deps="doc"
2396 texi2html_deps="doc"
2397
2398 # default parameters
2399
2400 logfile="config.log"
2401
2402 # installation paths
2403 prefix_default="/usr/local"
2404 bindir_default='${prefix}/bin'
2405 datadir_default='${prefix}/share/avconv'
2406 docdir_default='${prefix}/share/doc/libav'
2407 incdir_default='${prefix}/include'
2408 libdir_default='${prefix}/lib'
2409 mandir_default='${prefix}/share/man'
2410 shlibdir_default="$libdir_default"
2411
2412 # toolchain
2413 ar_default="ar"
2414 cc_default="gcc"
2415 host_cc_default="gcc"
2416 cp_f="cp -f"
2417 ln_s="ln -s -f"
2418 nm_default="nm -g"
2419 objformat="elf"
2420 pkg_config_default=pkg-config
2421 ranlib="ranlib"
2422 strip="strip"
2423 yasmexe="yasm"
2424
2425 # machine
2426 arch_default=$(uname -m)
2427 cpu="generic"
2428 intrinsics="none"
2429
2430 # OS
2431 target_os_default=$(tolower $(uname -s))
2432 host_os=$target_os_default
2433
2434 # configurable options
2435 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2436
2437 enable asm
2438 enable debug
2439 enable doc
2440 enable faan faandct faanidct
2441 enable optimizations
2442 enable safe_bitstream_reader
2443 enable static
2444 enable swscale_alpha
2445 enable valgrind_backtrace
2446
2447 # By default, enable only those hwaccels that have no external dependencies.
2448 enable d3d11va dxva2 vda vdpau
2449
2450 # build settings
2451 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2452 LIBPREF="lib"
2453 LIBSUF=".a"
2454 FULLNAME='$(NAME)$(BUILDSUF)'
2455 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2456 SLIBPREF="lib"
2457 SLIBSUF=".so"
2458 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2459 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2460 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2461 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2462 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2463 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2464
2465 asflags_filter=echo
2466 cflags_filter=echo
2467 ldflags_filter=echo
2468
2469 AS_C='-c'
2470 AS_O='-o $@'
2471 CC_C='-c'
2472 CC_E='-E -o $@'
2473 CC_O='-o $@'
2474 OBJCC_C='-c'
2475 OBJCC_E='-E -o $@'
2476 OBJCC_O='-o $@'
2477 LD_O='-o $@'
2478 LD_LIB='-l%'
2479 LD_PATH='-L'
2480 HOSTCC_C='-c'
2481 HOSTCC_E='-E -o $@'
2482 HOSTCC_O='-o $@'
2483 HOSTLD_O='-o $@'
2484
2485 host_libs='-lm'
2486 host_cflags_filter=echo
2487 host_ldflags_filter=echo
2488
2489 target_path='$(CURDIR)'
2490
2491 # since the object filename is not given with the -MM flag, the compiler
2492 # is only able to print the basename, and we must add the path ourselves
2493 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2494 DEPFLAGS='-MM'
2495
2496 # find source path
2497 if test -f configure; then
2498     source_path=.
2499 else
2500     source_path=$(cd $(dirname "$0"); pwd)
2501     echo "$source_path" | grep -q '[[:blank:]]' &&
2502         die "Out of tree builds are impossible with whitespace in source path."
2503     test -e "$source_path/config.h" &&
2504         die "Out of tree builds are impossible with config.h in source dir."
2505 fi
2506
2507 for v in "$@"; do
2508     r=${v#*=}
2509     l=${v%"$r"}
2510     r=$(sh_quote "$r")
2511     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2512 done
2513
2514 find_things(){
2515     thing=$1
2516     pattern=$2
2517     file=$source_path/$3
2518     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2519 }
2520
2521 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2522 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2523 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2524 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2525 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2526 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2527 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2528 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2529 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2530
2531 find_things_extern(){
2532     thing=$1
2533     pattern=$2
2534     file=$source_path/$3
2535     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2536 }
2537
2538 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2539 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2540
2541 ALL_COMPONENTS="
2542     $BSF_LIST
2543     $DECODER_LIST
2544     $DEMUXER_LIST
2545     $ENCODER_LIST
2546     $FILTER_LIST
2547     $HWACCEL_LIST
2548     $INDEV_LIST
2549     $MUXER_LIST
2550     $OUTDEV_LIST
2551     $PARSER_LIST
2552     $PROTOCOL_LIST
2553 "
2554
2555 for n in $COMPONENT_LIST; do
2556     v=$(toupper ${n%s})_LIST
2557     eval enable \$$v
2558     eval ${n}_if_any="\$$v"
2559 done
2560
2561 enable $ARCH_EXT_LIST
2562
2563 die_unknown(){
2564     echo "Unknown option \"$1\"."
2565     echo "See $0 --help for available options."
2566     exit 1
2567 }
2568
2569 print_3_columns() {
2570     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2571 }
2572
2573 show_list() {
2574     suffix=_$1
2575     shift
2576     echo $* | sed s/$suffix//g | print_3_columns
2577     exit 0
2578 }
2579
2580 rand_list(){
2581     IFS=', '
2582     set -- $*
2583     unset IFS
2584     for thing; do
2585         comp=${thing%:*}
2586         prob=${thing#$comp}
2587         prob=${prob#:}
2588         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2589         echo "prob ${prob:-0.5}"
2590         printf '%s\n' $comp
2591     done
2592 }
2593
2594 do_random(){
2595     action=$1
2596     shift
2597     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2598     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2599 }
2600
2601 for opt do
2602     optval="${opt#*=}"
2603     case "$opt" in
2604         --extra-ldflags=*)
2605             add_ldflags $optval
2606         ;;
2607         --extra-ldexeflags=*)
2608             add_ldexeflags $optval
2609         ;;
2610         --extra-libs=*)
2611             add_extralibs $optval
2612         ;;
2613         --disable-devices)
2614             disable $INDEV_LIST $OUTDEV_LIST
2615         ;;
2616         --enable-debug=*)
2617             debuglevel="$optval"
2618         ;;
2619         --disable-programs)
2620             disable $PROGRAM_LIST
2621         ;;
2622         --disable-everything)
2623             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2624         ;;
2625         --disable-all)
2626             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2627             disable $LIBRARY_LIST $PROGRAM_LIST doc
2628         ;;
2629         --enable-random|--disable-random)
2630             action=${opt%%-random}
2631             do_random ${action#--} $COMPONENT_LIST
2632         ;;
2633         --enable-random=*|--disable-random=*)
2634             action=${opt%%-random=*}
2635             do_random ${action#--} $optval
2636         ;;
2637         --enable-*=*|--disable-*=*)
2638             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2639             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2640             eval list=\$$(toupper $thing)_LIST
2641             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2642             $action $(filter "$name" $list)
2643         ;;
2644         --enable-avserver|--disable-avserver*)
2645             warn "avserver has been removed, the ${opt} option is only"\
2646                  "provided for compatibility and will be removed in the future"
2647         ;;
2648         --enable-?*|--disable-?*)
2649             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2650             if is_in $option $COMPONENT_LIST; then
2651                 test $action = disable && action=unset
2652                 eval $action \$$(toupper ${option%s})_LIST
2653             elif is_in $option $CMDLINE_SELECT; then
2654                 $action $option
2655             else
2656                 die_unknown $opt
2657             fi
2658         ;;
2659         --list-*)
2660             NAME="${opt#--list-}"
2661             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2662             NAME=${NAME%s}
2663             eval show_list $NAME \$$(toupper $NAME)_LIST
2664         ;;
2665         --help|-h) show_help
2666         ;;
2667         *)
2668             optname="${opt%%=*}"
2669             optname="${optname#--}"
2670             optname=$(echo "$optname" | sed 's/-/_/g')
2671             if is_in $optname $CMDLINE_SET; then
2672                 eval $optname='$optval'
2673             elif is_in $optname $CMDLINE_APPEND; then
2674                 append $optname "$optval"
2675             else
2676                 die_unknown $opt
2677             fi
2678         ;;
2679     esac
2680 done
2681
2682 for e in $env; do
2683     eval "export $e"
2684 done
2685
2686 disabled logging && logfile=/dev/null
2687
2688 # Disable all the library-specific components if the library itself
2689 # is disabled, see AVCODEC_LIST and following _LIST variables.
2690
2691 disable_components(){
2692     disabled ${1} && disable $(
2693         eval components="\$$(toupper ${1})_COMPONENTS"
2694         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2695     )
2696 }
2697
2698 map 'disable_components $v' $LIBRARY_LIST
2699
2700 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2701 set >> $logfile
2702
2703 case "$toolchain" in
2704     *-asan)
2705         cc_default="${toolchain%-asan}"
2706         add_cflags  -fsanitize=address
2707         add_ldflags -fsanitize=address
2708     ;;
2709     *-msan)
2710         cc_default="${toolchain%-msan}"
2711         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2712         add_ldflags -fsanitize=memory
2713     ;;
2714     *-tsan)
2715         cc_default="${toolchain%-tsan}"
2716         add_cflags  -fsanitize=thread -pie
2717         add_ldflags -fsanitize=thread -pie
2718         case "$toolchain" in
2719             gcc-tsan)
2720                 add_cflags  -fPIC
2721                 add_ldflags -fPIC
2722                 ;;
2723         esac
2724     ;;
2725     *-usan)
2726         cc_default="${toolchain%-usan}"
2727         add_cflags  -fsanitize=undefined
2728         add_ldflags -fsanitize=undefined
2729         case "$toolchain" in
2730             clang-usan)
2731                 add_cflags -O1
2732                 ;;
2733         esac
2734     ;;
2735     valgrind-*)
2736         target_exec_default="valgrind"
2737         case "$toolchain" in
2738             valgrind-massif)
2739                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2740                 ;;
2741             valgrind-memcheck)
2742                 target_exec_args="--track-origins=yes --leak-check=full"
2743                 ;;
2744         esac
2745     ;;
2746     msvc)
2747         # Check whether the current MSVC version needs the C99 converter.
2748         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2749         # support enough of C99 to build libav. Default to the new
2750         # behaviour if the regexp was unable to match anything, since this
2751         # successfully parses the version number of existing supported
2752         # versions that require the converter (MSVC 2010 and 2012).
2753         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2754         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2755             cc_default="cl"
2756         else
2757             cc_default="c99wrap cl"
2758         fi
2759         ld_default="$source_path/compat/windows/mslink"
2760         nm_default="dumpbin -symbols"
2761         ar_default="lib"
2762         case "$arch" in
2763         arm*)
2764             as_default="armasm"
2765             ;;
2766         esac
2767         target_os_default="win32"
2768         # Use a relative path for TMPDIR. This makes sure all the
2769         # ffconf temp files are written with a relative path, avoiding
2770         # issues with msys/win32 path conversion for MSVC parameters
2771         # such as -Fo<file> or -out:<file>.
2772         TMPDIR=.
2773     ;;
2774     icl)
2775         cc_default="icl"
2776         ld_default="xilink"
2777         nm_default="dumpbin -symbols"
2778         ar_default="xilib"
2779         target_os_default="win32"
2780         TMPDIR=.
2781     ;;
2782     gcov)
2783         add_cflags  -fprofile-arcs -ftest-coverage
2784         add_ldflags -fprofile-arcs -ftest-coverage
2785     ;;
2786     llvm-cov)
2787         add_cflags -fprofile-arcs -ftest-coverage
2788         add_ldflags --coverage
2789     ;;
2790     hardened)
2791         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2792         add_cflags   -fno-strict-overflow -fstack-protector-all
2793         add_ldflags  -Wl,-z,relro -Wl,-z,now
2794     ;;
2795     ?*)
2796         die "Unknown toolchain $toolchain"
2797     ;;
2798 esac
2799
2800 test -n "$cross_prefix" && enable cross_compile
2801
2802 if enabled cross_compile; then
2803     test -n "$arch" && test -n "$target_os" ||
2804         die "Must specify target arch and OS when cross-compiling"
2805 fi
2806
2807 ar_default="${cross_prefix}${ar_default}"
2808 cc_default="${cross_prefix}${cc_default}"
2809 occ_default="${cross_prefix}${occ_default}"
2810 nm_default="${cross_prefix}${nm_default}"
2811 pkg_config_default="${cross_prefix}${pkg_config_default}"
2812 ranlib="${cross_prefix}${ranlib}"
2813 strip="${cross_prefix}${strip}"
2814
2815 sysinclude_default="${sysroot}/usr/include"
2816
2817 set_default arch cc pkg_config sysinclude target_exec target_os
2818 enabled cross_compile || host_cc_default=$cc
2819 set_default host_cc
2820
2821 if ! $pkg_config --version >/dev/null 2>&1; then
2822     warn "$pkg_config not found, library detection may fail."
2823     pkg_config=false
2824 fi
2825
2826 exesuf() {
2827     case $1 in
2828         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2829     esac
2830 }
2831
2832 EXESUF=$(exesuf $target_os)
2833 HOSTEXESUF=$(exesuf $host_os)
2834
2835 # set temporary file name
2836 : ${TMPDIR:=$TEMPDIR}
2837 : ${TMPDIR:=$TMP}
2838 : ${TMPDIR:=/tmp}
2839
2840 if ! check_cmd mktemp -u XXXXXX; then
2841     # simple replacement for missing mktemp
2842     # NOT SAFE FOR GENERAL USE
2843     mktemp(){
2844         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2845     }
2846 fi
2847
2848 tmpfile(){
2849     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2850         (set -C; exec > $tmp) 2>/dev/null ||
2851         die "Unable to create temporary file in $TMPDIR."
2852     append TMPFILES $tmp
2853     eval $1=$tmp
2854 }
2855
2856 trap 'rm -f -- $TMPFILES' EXIT
2857
2858 tmpfile TMPASM .asm
2859 tmpfile TMPC   .c
2860 tmpfile TMPE   $EXESUF
2861 tmpfile TMPH   .h
2862 tmpfile TMPO   .o
2863 tmpfile TMPS   .S
2864 tmpfile TMPSH  .sh
2865 tmpfile TMPV   .ver
2866
2867 unset -f mktemp
2868
2869 chmod +x $TMPE
2870
2871 # make sure we can execute files in $TMPDIR
2872 cat > $TMPSH 2>> $logfile <<EOF
2873 #! /bin/sh
2874 EOF
2875 chmod +x $TMPSH >> $logfile 2>&1
2876 if ! $TMPSH >> $logfile 2>&1; then
2877     cat <<EOF
2878 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2879 variable to another directory and make sure that it is not mounted noexec.
2880 EOF
2881     die "Sanity test failed."
2882 fi
2883
2884 armasm_flags(){
2885     for flag; do
2886         case $flag in
2887             # Filter out MSVC cl.exe options from cflags that shouldn't
2888             # be passed to gas-preprocessor
2889             -M[TD]*)                                            ;;
2890             *)                  echo $flag                      ;;
2891         esac
2892    done
2893 }
2894
2895 ccc_flags(){
2896     for flag; do
2897         case $flag in
2898             -std=c99)           echo -c99                       ;;
2899             -mcpu=*)            echo -arch ${flag#*=}           ;;
2900             -mieee)             echo -ieee                      ;;
2901             -O*|-fast)          echo $flag                      ;;
2902             -fno-math-errno)    echo -assume nomath_errno       ;;
2903             -g)                 echo -g3                        ;;
2904             -Wall)              echo -msg_enable level2         ;;
2905             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2906             -Wl,*)              echo $flag                      ;;
2907             -f*|-W*)                                            ;;
2908             *)                  echo $flag                      ;;
2909         esac
2910    done
2911 }
2912
2913 cparser_flags(){
2914     for flag; do
2915         case $flag in
2916             -Wno-switch)             echo -Wno-switch-enum ;;
2917             -Wno-format-zero-length) ;;
2918             -Wdisabled-optimization) ;;
2919             -Wno-pointer-sign)       echo -Wno-other ;;
2920             *)                       echo $flag ;;
2921         esac
2922     done
2923 }
2924
2925 msvc_common_flags(){
2926     for flag; do
2927         case $flag in
2928             # In addition to specifying certain flags under the compiler
2929             # specific filters, they must be specified here as well or else the
2930             # generic catch all at the bottom will print the original flag.
2931             -Wall)                ;;
2932             -std=c99)             ;;
2933             # Common flags
2934             -fomit-frame-pointer) ;;
2935             -g)                   echo -Z7 ;;
2936             -fno-math-errno)      ;;
2937             -fno-common)          ;;
2938             -fno-signed-zeros)    ;;
2939             -fPIC)                ;;
2940             -mthumb)              ;;
2941             -march=*)             ;;
2942             -lz)                  echo zlib.lib ;;
2943             -lavifil32)           echo vfw32.lib ;;
2944             -lavicap32)           echo vfw32.lib user32.lib ;;
2945             -lx264)               echo libx264.lib ;;
2946             -l*)                  echo ${flag#-l}.lib ;;
2947             -L*)                  echo -libpath:${flag#-L} ;;
2948             *)                    echo $flag ;;
2949         esac
2950     done
2951 }
2952
2953 msvc_flags(){
2954     msvc_common_flags "$@"
2955     for flag; do
2956         case $flag in
2957             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
2958                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
2959                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
2960                                        -wd4273 -wd4554 -wd4701 ;;
2961         esac
2962     done
2963 }
2964
2965 icl_flags(){
2966     msvc_common_flags "$@"
2967     for flag; do
2968         case $flag in
2969             # Despite what Intel's documentation says -Wall, which is supported
2970             # on Windows, does enable remarks so disable them here.
2971             -Wall)                echo $flag -Qdiag-disable:remark ;;
2972             -std=c99)             echo -Qstd=c99 ;;
2973         esac
2974     done
2975 }
2976
2977 pgi_flags(){
2978     for flag; do
2979         case $flag in
2980             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
2981             -fomit-frame-pointer) echo -Mnoframe ;;
2982             -g)                   echo -gopt ;;
2983             *)                    echo $flag ;;
2984         esac
2985     done
2986 }
2987
2988 suncc_flags(){
2989     for flag; do
2990         case $flag in
2991             -march=*|-mcpu=*)
2992                 case "${flag#*=}" in
2993                     native)                   echo -xtarget=native       ;;
2994                     v9|niagara)               echo -xarch=sparc          ;;
2995                     ultrasparc)               echo -xarch=sparcvis       ;;
2996                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
2997                     i586|pentium)             echo -xchip=pentium        ;;
2998                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
2999                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3000                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3001                     pentium4*)          echo -xtarget=pentium4           ;;
3002                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3003                     *-sse3)             echo -xarch=sse3                 ;;
3004                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3005                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3006                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3007                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3008                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3009                     k8|opteron|athlon64|athlon-fx)
3010                                                echo -xarch=sse2a         ;;
3011                     athlon*)                   echo -xarch=pentium_proa  ;;
3012                 esac
3013                 ;;
3014             -std=c99)             echo -xc99              ;;
3015             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3016             -fPIC)                echo -KPIC -xcode=pic32 ;;
3017             -W*,*)                echo $flag              ;;
3018             -f*-*|-W*|-mimpure-text)                      ;;
3019             -shared)              echo -G                 ;;
3020             *)                    echo $flag              ;;
3021         esac
3022     done
3023 }
3024
3025 tms470_flags(){
3026     for flag; do
3027         case $flag in
3028             -march=*|-mcpu=*)
3029                 case "${flag#*=}" in
3030                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3031                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3032                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3033                     armv6*|arm11*)          echo -mv=6   ;;
3034                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3035                                             echo -mv=5e  ;;
3036                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3037                 esac
3038                 ;;
3039             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3040             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3041             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3042             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3043             -msoft-float)   echo --float_support=vfplib       ;;
3044             -O[0-3]|-mf=*)  echo $flag                        ;;
3045             -g)             echo -g -mn                       ;;
3046             -pds=*)         echo $flag                        ;;
3047             -D*|-I*)        echo $flag                        ;;
3048             --gcc|--abi=*)  echo $flag                        ;;
3049             -me)            echo $flag                        ;;
3050         esac
3051     done
3052 }
3053
3054 probe_cc(){
3055     pfx=$1
3056     _cc=$2
3057
3058     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3059     unset _ld_o _ldflags _ld_lib _ld_path
3060     unset _depflags _DEPCMD _DEPFLAGS
3061     _flags_filter=echo
3062
3063     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3064         _type=llvm_gcc
3065         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3066         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3067         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3068         _cflags_speed='-O3'
3069         _cflags_size='-Os'
3070     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3071         _type=gcc
3072         gcc_version=$($_cc --version | head -n1)
3073         gcc_basever=$($_cc -dumpversion)
3074         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3075         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3076         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3077         if ! $_cc -dumpversion | grep -q '^2\.'; then
3078             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3079         fi
3080         _cflags_speed='-O3'
3081         _cflags_size='-Os'
3082     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3083         _type=icc
3084         _ident=$($_cc --version | head -n1)
3085         _depflags='-MMD'
3086         _cflags_speed='-O3'
3087         _cflags_size='-Os'
3088         _cflags_noopt='-O1'
3089     elif $_cc -v 2>&1 | grep -q xlc; then
3090         _type=xlc
3091         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3092         _cflags_speed='-O5'
3093         _cflags_size='-O5 -qcompact'
3094     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3095         _type=ccc
3096         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3097         _DEPFLAGS='-M'
3098         _cflags_speed='-fast'
3099         _cflags_size='-O1'
3100         _flags_filter=ccc_flags
3101     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3102         test -d "$sysroot" || die "No valid sysroot specified."
3103         _type=armcc
3104         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3105         armcc_conf="$PWD/armcc.conf"
3106         $_cc --arm_linux_configure                 \
3107              --arm_linux_config_file="$armcc_conf" \
3108              --configure_sysroot="$sysroot"        \
3109              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3110              die "Error creating armcc configuration file."
3111         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3112         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3113         as_default="${cross_prefix}gcc"
3114         _depflags='-MMD'
3115         _cflags_speed='-O3'
3116         _cflags_size='-Os'
3117     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3118         _type=tms470
3119         _ident=$($_cc -version | head -n1 | tr -s ' ')
3120         _flags='--gcc --abi=eabi -me'
3121         _cc_e='-ppl -fe=$@'
3122         _cc_o='-fe=$@'
3123         _depflags='-ppa -ppd=$(@:.o=.d)'
3124         _cflags_speed='-O3 -mf=5'
3125         _cflags_size='-O3 -mf=2'
3126         _flags_filter=tms470_flags
3127     elif $_cc -v 2>&1 | grep -q clang; then
3128         _type=clang
3129         _ident=$($_cc --version 2>/dev/null | head -n1)
3130         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3131         _cflags_speed='-O3'
3132         _cflags_size='-Os'
3133     elif $_cc -V 2>&1 | grep -q Sun; then
3134         _type=suncc
3135         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3136         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3137         _DEPFLAGS='-xM1 -xc99'
3138         _ldflags='-std=c99'
3139         _cflags_speed='-O5'
3140         _cflags_size='-O5 -xspace'
3141         _flags_filter=suncc_flags
3142     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3143         _type=pathscale
3144         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3145         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3146         _cflags_speed='-O2'
3147         _cflags_size='-Os'
3148         _flags_filter='filter_out -Wdisabled-optimization'
3149     elif $_cc -v 2>&1 | grep -q Open64; then
3150         _type=open64
3151         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3152         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3153         _cflags_speed='-O2'
3154         _cflags_size='-Os'
3155         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3156     elif $_cc -V 2>&1 | grep -q Portland; then
3157         _type=pgi
3158         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3159         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3160         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3161         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3162         _cflags_noopt="-O1"
3163         _flags_filter=pgi_flags
3164     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3165         _type=armasm
3166         _ident=$($_cc | head -n1)
3167         # 4509: "This form of conditional instruction is deprecated"
3168         _flags="-nologo -ignore 4509"
3169         _flags_filter=armasm_flags
3170     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3171         _type=msvc
3172         _ident=$($_cc 2>&1 | head -n1)
3173         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3174         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3175         _cflags_speed="-O2"
3176         _cflags_size="-O1"
3177         if $_cc -nologo- 2>&1 | grep -q Linker; then
3178             _ld_o='-out:$@'
3179         else
3180             _ld_o='-Fe$@'
3181         fi
3182         _cc_o='-Fo$@'
3183         _cc_e='-P -Fi$@'
3184         _flags_filter=msvc_flags
3185         _ld_lib='lib%.a'
3186         _ld_path='-libpath:'
3187         _flags='-nologo'
3188         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS'
3189     elif $_cc 2>&1 | grep -q Intel; then
3190         _type=icl
3191         _ident=$($_cc 2>&1 | head -n1)
3192         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3193         # Not only is O3 broken on 13.x+ but it is slower on all previous
3194         # versions (tested) as well.
3195         _cflags_speed="-O2"
3196         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3197         if $_cc 2>&1 | grep -q Linker; then
3198             _ld_o='-out:$@'
3199         else
3200             _ld_o='-Fe$@'
3201         fi
3202         _cc_o='-Fo$@'
3203         _cc_e='-P'
3204         _flags_filter=icl_flags
3205         _ld_lib='lib%.a'
3206         _ld_path='-libpath:'
3207         # -Qdiag-error to make icl error when seeing certain unknown arguments
3208         _flags='-nologo -Qdiag-error:4044,10157'
3209         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3210         # with MSVC which enables it by default.
3211         _cflags='-D_USE_MATH_DEFINES -Qms0 -Qvec- -Qsimd- -GS'
3212     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3213         _type=cparser
3214         _ident=$($_cc --version | head -n1)
3215         _depflags='-MMD'
3216         _cflags_speed='-O4'
3217         _cflags_size='-O2'
3218         _flags_filter=cparser_flags
3219     fi
3220
3221     eval ${pfx}_type=\$_type
3222     eval ${pfx}_ident=\$_ident
3223 }
3224
3225 set_ccvars(){
3226     eval ${1}_C=\${_cc_c-\${${1}_C}}
3227     eval ${1}_E=\${_cc_e-\${${1}_E}}
3228     eval ${1}_O=\${_cc_o-\${${1}_O}}
3229
3230     if [ -n "$_depflags" ]; then
3231         eval ${1}_DEPFLAGS=\$_depflags
3232     else
3233         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3234         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3235         eval DEP${1}FLAGS=\$_flags
3236     fi
3237 }
3238
3239 probe_cc cc "$cc"
3240 cflags_filter=$_flags_filter
3241 cflags_speed=$_cflags_speed
3242 cflags_size=$_cflags_size
3243 cflags_noopt=$_cflags_noopt
3244 add_cflags $_flags $_cflags
3245 cc_ldflags=$_ldflags
3246 set_ccvars CC
3247
3248 probe_cc hostcc "$host_cc"
3249 host_cflags_filter=$_flags_filter
3250 add_host_cflags  $_flags $_cflags
3251 set_ccvars HOSTCC
3252
3253 test -n "$cc_type" && enable $cc_type ||
3254     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3255
3256 : ${as_default:=$cc}
3257 : ${objcc_default:=$cc}
3258 : ${dep_cc_default:=$cc}
3259 : ${ld_default:=$cc}
3260 : ${host_ld_default:=$host_cc}
3261 set_default ar as objcc dep_cc ld host_ld
3262
3263 probe_cc as "$as"
3264 asflags_filter=$_flags_filter
3265 add_asflags $_flags $_cflags
3266 set_ccvars AS
3267
3268 probe_cc objcc "$objcc"
3269 objcflags_filter=$_flags_filter
3270 add_objcflags $_flags $_cflags
3271 set_ccvars OBJC
3272
3273 probe_cc ld "$ld"
3274 ldflags_filter=$_flags_filter
3275 add_ldflags $_flags $_ldflags
3276 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3277 LD_O=${_ld_o-$LD_O}
3278 LD_LIB=${_ld_lib-$LD_LIB}
3279 LD_PATH=${_ld_path-$LD_PATH}
3280
3281 probe_cc hostld "$host_ld"
3282 host_ldflags_filter=$_flags_filter
3283 add_host_ldflags $_flags $_ldflags
3284 HOSTLD_O=${_ld_o-$HOSTLD_O}
3285
3286 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3287     probe_cc depcc "$dep_cc"
3288     CCDEP=${_DEPCMD:-$DEPCMD}
3289     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3290     DEPCCFLAGS=$_flags
3291 fi
3292
3293 if $ar 2>&1 | grep -q Microsoft; then
3294     arflags="-nologo"
3295     ar_o='-out:$@'
3296 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3297     arflags="rq"
3298     ar_o='$@'
3299 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3300     arflags='-Xany -r -c'
3301     ar_o='$@'
3302 else
3303     arflags="rc"
3304     ar_o='$@'
3305 fi
3306
3307 add_cflags $extra_cflags
3308 add_objcflags $extra_objcflags
3309 add_asflags $extra_cflags
3310
3311 if test -n "$sysroot"; then
3312     case "$cc_type" in
3313         gcc|llvm_gcc|clang)
3314             add_cppflags --sysroot="$sysroot"
3315             add_ldflags --sysroot="$sysroot"
3316         ;;
3317         tms470)
3318             add_cppflags -I"$sysinclude"
3319             add_ldflags  --sysroot="$sysroot"
3320         ;;
3321     esac
3322 fi
3323
3324 if test "$cpu" = host; then
3325     enabled cross_compile &&
3326         die "--cpu=host makes no sense when cross-compiling."
3327
3328     case "$cc_type" in
3329         gcc|llvm_gcc)
3330             check_native(){
3331                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3332                 sed -n "/cc1.*$1=/{
3333                             s/.*$1=\\([^ ]*\\).*/\\1/
3334                             p
3335                             q
3336                         }" $TMPE
3337             }
3338             cpu=$(check_native -march || check_native -mcpu)
3339         ;;
3340     esac
3341
3342     test "${cpu:-host}" = host &&
3343         die "--cpu=host not supported with compiler $cc"
3344 fi
3345
3346 # Deal with common $arch aliases
3347 case "$arch" in
3348     aarch64|arm64)
3349         arch="aarch64"
3350     ;;
3351     arm*)
3352         arch="arm"
3353     ;;
3354     mips*|IP*)
3355         case "$arch" in
3356         *el)
3357             add_cppflags -EL
3358             add_ldflags -EL
3359         ;;
3360         *eb)
3361             add_cppflags -EB
3362             add_ldflags -EB
3363         ;;
3364         esac
3365         arch="mips"
3366     ;;
3367     parisc*|hppa*)
3368         arch="parisc"
3369     ;;
3370     "Power Macintosh"|ppc*|powerpc*)
3371         arch="ppc"
3372     ;;
3373     s390|s390x)
3374         arch="s390"
3375     ;;
3376     sh4|sh)
3377         arch="sh4"
3378     ;;
3379     sun4u|sparc*)
3380         arch="sparc"
3381     ;;
3382     tilegx|tile-gx)
3383         arch="tilegx"
3384     ;;
3385     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3386         arch="x86"
3387     ;;
3388 esac
3389
3390 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3391 enable $arch
3392
3393 # Add processor-specific flags
3394 if enabled aarch64; then
3395
3396     case $cpu in
3397         armv*)
3398             cpuflags="-march=$cpu"
3399         ;;
3400         *)
3401             cpuflags="-mcpu=$cpu"
3402         ;;
3403     esac
3404
3405 elif enabled alpha; then
3406
3407     cpuflags="-mcpu=$cpu"
3408
3409 elif enabled arm; then
3410
3411     check_arm_arch() {
3412         check_cpp_condition stddef.h \
3413             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3414             $cpuflags
3415     }
3416
3417     probe_arm_arch() {
3418         if   check_arm_arch 4;        then echo armv4;
3419         elif check_arm_arch 4T;       then echo armv4t;
3420         elif check_arm_arch 5;        then echo armv5;
3421         elif check_arm_arch 5E;       then echo armv5e;
3422         elif check_arm_arch 5T;       then echo armv5t;
3423         elif check_arm_arch 5TE;      then echo armv5te;
3424         elif check_arm_arch 5TEJ;     then echo armv5te;
3425         elif check_arm_arch 6;        then echo armv6;
3426         elif check_arm_arch 6J;       then echo armv6j;
3427         elif check_arm_arch 6K;       then echo armv6k;
3428         elif check_arm_arch 6Z;       then echo armv6z;
3429         elif check_arm_arch 6ZK;      then echo armv6zk;
3430         elif check_arm_arch 6T2;      then echo armv6t2;
3431         elif check_arm_arch 7;        then echo armv7;
3432         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3433         elif check_arm_arch 7S;       then echo armv7-a;
3434         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3435         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3436         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3437         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3438         fi
3439     }
3440
3441     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3442
3443     case $cpu in
3444         armv*)
3445             cpuflags="-march=$cpu"
3446             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3447         ;;
3448         *)
3449             cpuflags="-mcpu=$cpu"
3450             case $cpu in
3451                 cortex-a*)                               subarch=armv7a  ;;
3452                 cortex-r*)                               subarch=armv7r  ;;
3453                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3454                 arm11*)                                  subarch=armv6   ;;
3455                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3456                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3457                 *)                             subarch=$(probe_arm_arch) ;;
3458             esac
3459         ;;
3460     esac
3461
3462     case "$subarch" in
3463         armv5t*)    enable fast_clz                ;;
3464         armv[6-8]*) enable fast_clz fast_unaligned ;;
3465     esac
3466
3467 elif enabled avr32; then
3468
3469     case $cpu in
3470         ap7[02]0[0-2])
3471             subarch="avr32_ap"
3472             cpuflags="-mpart=$cpu"
3473         ;;
3474         ap)
3475             subarch="avr32_ap"
3476             cpuflags="-march=$cpu"
3477         ;;
3478         uc3[ab]*)
3479             subarch="avr32_uc"
3480             cpuflags="-mcpu=$cpu"
3481         ;;
3482         uc)
3483             subarch="avr32_uc"
3484             cpuflags="-march=$cpu"
3485         ;;
3486     esac
3487
3488 elif enabled bfin; then
3489
3490     cpuflags="-mcpu=$cpu"
3491
3492 elif enabled mips; then
3493
3494     cpuflags="-march=$cpu"
3495
3496 elif enabled ppc; then
3497
3498     disable ldbrx
3499
3500     case $(tolower $cpu) in
3501         601|ppc601|powerpc601)
3502             cpuflags="-mcpu=601"
3503             disable altivec
3504         ;;
3505         603*|ppc603*|powerpc603*)
3506             cpuflags="-mcpu=603"
3507             disable altivec
3508         ;;
3509         604*|ppc604*|powerpc604*)
3510             cpuflags="-mcpu=604"
3511             disable altivec
3512         ;;
3513         g3|75*|ppc75*|powerpc75*)
3514             cpuflags="-mcpu=750"
3515             disable altivec
3516         ;;
3517         g4|745*|ppc745*|powerpc745*)
3518             cpuflags="-mcpu=7450"
3519             disable vsx
3520         ;;
3521         74*|ppc74*|powerpc74*)
3522             cpuflags="-mcpu=7400"
3523             disable vsx
3524         ;;
3525         g5|970|ppc970|powerpc970)
3526             cpuflags="-mcpu=970"
3527             disable vsx
3528         ;;
3529         power[3-6]*)
3530             cpuflags="-mcpu=$cpu"
3531             disable vsx
3532         ;;
3533         power[7-8]*)
3534             cpuflags="-mcpu=$cpu"
3535             enable ldbrx
3536         ;;
3537         cell)
3538             cpuflags="-mcpu=cell"
3539             enable ldbrx
3540             disable vsx
3541         ;;
3542         e500mc)
3543             cpuflags="-mcpu=e500mc"
3544             disable altivec
3545         ;;
3546         e500v2)
3547             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3548             disable altivec
3549             disable dcbzl
3550         ;;
3551         e500)
3552             cpuflags="-mcpu=8540 -mhard-float"
3553             disable altivec
3554             disable dcbzl
3555         ;;
3556     esac
3557
3558 elif enabled sparc; then
3559
3560     case $cpu in
3561         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3562             cpuflags="-mcpu=$cpu"
3563         ;;
3564         ultrasparc*|niagara[234])
3565             cpuflags="-mcpu=$cpu"
3566         ;;
3567     esac
3568
3569 elif enabled x86; then
3570
3571     case $cpu in
3572         i[345]86|pentium)
3573             cpuflags="-march=$cpu"
3574             disable i686
3575             disable mmx
3576         ;;
3577         # targets that do NOT support nopl and conditional mov (cmov)
3578         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3579             cpuflags="-march=$cpu"
3580             disable i686
3581         ;;
3582         # targets that do support nopl and conditional mov (cmov)
3583         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3584             cpuflags="-march=$cpu"
3585             enable i686
3586             enable fast_cmov
3587         ;;
3588         # targets that do support conditional mov but on which it's slow
3589         pentium4|pentium4m|prescott|nocona)
3590             cpuflags="-march=$cpu"
3591             enable i686
3592             disable fast_cmov
3593         ;;
3594     esac
3595
3596 fi
3597
3598 if [ "$cpu" != generic ]; then
3599     add_cflags  $cpuflags
3600     add_asflags $cpuflags
3601     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3602 fi
3603
3604 # compiler sanity check
3605 check_exec <<EOF
3606 int main(void){ return 0; }
3607 EOF
3608 if test "$?" != 0; then
3609     echo "$cc is unable to create an executable file."
3610     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3611         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3612         echo "Only do this if you know what cross compiling means."
3613     fi
3614     die "C compiler test failed."
3615 fi
3616
3617 add_cppflags -D_ISOC99_SOURCE
3618 check_cflags -std=c99
3619 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3620 #include <stdlib.h>
3621 EOF
3622 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3623 #include <stdlib.h>
3624 EOF
3625
3626 add_host_cppflags -D_ISOC99_SOURCE
3627 check_host_cflags -std=c99
3628 check_host_cflags -Wall
3629 check_host_cflags -O3
3630
3631 check_64bit(){
3632     arch32=$1
3633     arch64=$2
3634     expr=$3
3635     check_code cc "" "int test[2*($expr) - 1]" &&
3636         subarch=$arch64 || subarch=$arch32
3637 }
3638
3639 case "$arch" in
3640     aarch64|alpha|ia64)
3641         spic=$shared
3642     ;;
3643     mips)
3644         check_64bit mips mips64 '_MIPS_SIM > 1'
3645         spic=$shared
3646     ;;
3647     parisc)
3648         check_64bit parisc parisc64 'sizeof(void *) > 4'
3649         spic=$shared
3650     ;;
3651     ppc)
3652         check_64bit ppc ppc64 'sizeof(void *) > 4'
3653         spic=$shared
3654     ;;
3655     s390)
3656         check_64bit s390 s390x 'sizeof(void *) > 4'
3657         spic=$shared
3658     ;;
3659     sparc)
3660         check_64bit sparc sparc64 'sizeof(void *) > 4'
3661         spic=$shared
3662     ;;
3663     x86)
3664         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3665         if test "$subarch" = "x86_64"; then
3666             spic=$shared
3667         fi
3668     ;;
3669 esac
3670
3671 enable $subarch
3672 enabled spic && enable_weak pic
3673
3674 # OS specific
3675 case $target_os in
3676     aix)
3677         SHFLAGS=-shared
3678         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3679         enabled shared && add_ldflags -Wl,-brtl
3680         ;;
3681     android)
3682         disable symver
3683         enable section_data_rel_ro
3684         SLIB_INSTALL_NAME='$(SLIBNAME)'
3685         SLIB_INSTALL_LINKS=
3686         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3687         ;;
3688     haiku)
3689         prefix_default="/boot/common"
3690         network_extralibs="-lnetwork"
3691         host_libs=
3692         ;;
3693     sunos)
3694         SHFLAGS='-shared -Wl,-h,$$(@F)'
3695         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3696         network_extralibs="-lsocket -lnsl"
3697         # When using suncc to build, the Solaris linker will mark
3698         # an executable with each instruction set encountered by
3699         # the Solaris assembler.  As our libraries contain their own
3700         # guards for processor-specific code, instead suppress
3701         # generation of the HWCAPS ELF section on Solaris x86 only.
3702         enabled_all suncc x86 &&
3703             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3704             add_ldflags -Wl,-M,mapfile
3705         nm_default='nm -P -g'
3706         SLIB_CREATE_DEF_CMD='$(Q)perl $(SRC_PATH)/compat/solaris/make_sunver.pl $$(filter %.ver,$$^) $(OBJS) | grep -v @ > $(SUBDIR)lib$(NAME).ver-sol2'
3707         ;;
3708     netbsd)
3709         disable symver
3710         oss_indev_extralibs="-lossaudio"
3711         oss_outdev_extralibs="-lossaudio"
3712         ;;
3713     openbsd|bitrig)
3714         disable symver
3715         SHFLAGS='-shared'
3716         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3717         SLIB_INSTALL_LINKS=
3718         oss_indev_extralibs="-lossaudio"
3719         oss_outdev_extralibs="-lossaudio"
3720         ;;
3721     dragonfly)
3722         disable symver
3723         ;;
3724     freebsd)
3725         ;;
3726     bsd/os)
3727         add_extralibs -lpoll -lgnugetopt
3728         ;;
3729     darwin)
3730         enabled ppc && add_asflags -force_cpusubtype_ALL
3731         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3732         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3733         add_ldflags -Wl,-dynamic,-search_paths_first
3734         SLIBSUF=".dylib"
3735         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3736         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3737         objformat="macho"
3738         enabled x86_64 && objformat="macho64"
3739         enabled_any pic shared ||
3740             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3741         ;;
3742     msys*)
3743         die "Native MSYS builds are discouraged, please use the MINGW environment.";
3744         ;;
3745     mingw32*|mingw64*)
3746         if test $target_os = "mingw32ce"; then
3747             disable network
3748         else
3749             target_os=mingw32
3750         fi
3751         LIBTARGET=i386
3752         if enabled x86_64; then
3753             LIBTARGET="i386:x86-64"
3754         elif enabled arm; then
3755             LIBTARGET=arm-wince
3756         fi
3757         check_ldflags -Wl,--nxcompat
3758         check_ldflags -Wl,--dynamicbase
3759         shlibdir_default="$bindir_default"
3760         SLIBPREF=""
3761         SLIBSUF=".dll"
3762         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3763         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3764         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3765         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3766         SLIB_INSTALL_LINKS=
3767         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3768         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3769         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3770         objformat="win32"
3771         dlltool="${cross_prefix}dlltool"
3772         ranlib=:
3773         enable dos_paths
3774         ;;
3775     win32|win64)
3776         disable symver
3777         if enabled shared; then
3778             # Link to the import library instead of the normal static library
3779             # for shared libs.
3780             LD_LIB='%.lib'
3781             # Cannot build both shared and static libs with MSVC or icl.
3782             disable static
3783         fi
3784         shlibdir_default="$bindir_default"
3785         SLIBPREF=""
3786         SLIBSUF=".dll"
3787         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3788         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3789         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3790         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3791         SLIB_INSTALL_LINKS=
3792         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3793         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3794         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3795         objformat="win32"
3796         ranlib=:
3797         enable dos_paths
3798         ;;
3799     cygwin*)
3800         target_os=cygwin
3801         shlibdir_default="$bindir_default"
3802         SLIBPREF="cyg"
3803         SLIBSUF=".dll"
3804         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3805         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3806         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3807         SLIB_INSTALL_LINKS=
3808         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3809         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3810         objformat="win32"
3811         enable dos_paths
3812         ;;
3813     *-dos|freedos|opendos)
3814         network_extralibs="-lsocket"
3815         objformat="coff"
3816         enable dos_paths
3817         add_cppflags -U__STRICT_ANSI__
3818         ;;
3819     linux)
3820         enable dv1394
3821         enable section_data_rel_ro
3822         ;;
3823     irix*)
3824         target_os=irix
3825         ranlib="echo ignoring ranlib"
3826         ;;
3827     os/2*)
3828         ln_s="cp -f"
3829         objformat="aout"
3830         add_cppflags -D_GNU_SOURCE
3831         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3832         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3833         LIBSUF="_s.a"
3834         SLIBPREF=""
3835         SLIBSUF=".dll"
3836         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3837         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3838         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3839             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3840             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3841             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3842             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3843         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3844             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3845         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3846         enable dos_paths
3847         ;;
3848     gnu/kfreebsd)
3849         add_cppflags -D_BSD_SOURCE
3850         ;;
3851     gnu)
3852         ;;
3853     qnx)
3854         add_cppflags -D_QNX_SOURCE
3855         network_extralibs="-lsocket"
3856         ;;
3857     symbian)
3858         SLIBSUF=".dll"
3859         enable dos_paths
3860         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3861         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3862         add_ldflags -Wl,--target1-abs,--no-undefined \
3863                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3864                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3865         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3866                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3867                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3868         ;;
3869     osf1)
3870         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3871         ;;
3872     minix)
3873         ;;
3874     plan9)
3875         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3876                      -D_REENTRANT_SOURCE        \
3877                      -D_RESEARCH_SOURCE         \
3878                      -DFD_SETSIZE=96            \
3879                      -DHAVE_SOCK_OPTS
3880         add_compat strtod.o strtod=avpriv_strtod
3881         network_extralibs='-lbsd'
3882         exeobjs=compat/plan9/main.o
3883         cp_f='cp'
3884         ;;
3885     none)
3886         ;;
3887     *)
3888         die "Unknown OS '$target_os'."
3889         ;;
3890 esac
3891
3892 # determine libc flavour
3893
3894 probe_libc(){
3895     pfx=$1
3896     pfx_no_=${pfx%_}
3897     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3898     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3899         eval ${pfx}libc_type=uclibc
3900         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3901     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3902         eval ${pfx}libc_type=glibc
3903         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3904     # MinGW headers can be installed on Cygwin, so check for newlib first.
3905     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3906         eval ${pfx}libc_type=newlib
3907         add_${pfx}cppflags -U__STRICT_ANSI__
3908     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3909     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3910         eval ${pfx}libc_type=mingw64
3911         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3912         eval test \$${pfx_no_}cc_type = "gcc" &&
3913             add_${pfx}cppflags -D__printf__=__gnu_printf__
3914     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3915          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3916         eval ${pfx}libc_type=mingw32
3917         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3918             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3919             die "ERROR: MinGW32 runtime version must be >= 3.15."
3920         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3921         eval test \$${pfx_no_}cc_type = "gcc" &&
3922             add_${pfx}cppflags -D__printf__=__gnu_printf__
3923     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3924         eval ${pfx}libc_type=msvcrt
3925         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
3926             if [ "$pfx" = host_ ]; then
3927                 add_host_cppflags -Dsnprintf=_snprintf
3928             else
3929                 add_compat strtod.o strtod=avpriv_strtod
3930                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3931                                              _snprintf=avpriv_snprintf  \
3932                                              vsnprintf=avpriv_vsnprintf
3933             fi
3934         fi
3935         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3936         # 0x601 by default unless something else is set by the user.
3937         # This can easily lead to us detecting functions only present
3938         # in such new versions and producing binaries requiring windows 7.0.
3939         # Therefore explicitly set the default to XP unless the user has
3940         # set something else on the command line.
3941         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
3942         # family. For these cases, configure is free to use any functions
3943         # found in the SDK headers by default. (Alternatively, we could force
3944         # _WIN32_WINNT to 0x0602 in that case.)
3945         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
3946             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
3947 #ifdef WINAPI_FAMILY
3948 #include <winapifamily.h>
3949 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
3950 #error not desktop
3951 #endif
3952 #endif
3953 EOF
3954     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
3955         eval ${pfx}libc_type=klibc
3956     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
3957         eval ${pfx}libc_type=bionic
3958     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
3959         eval ${pfx}libc_type=solaris
3960         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
3961     else
3962         eval ${pfx}libc_type=default
3963         add_${pfx}cppflags -D_DEFAULT_SOURCE
3964     fi
3965 }
3966
3967 probe_libc
3968 test -n "$libc_type" && enable libc_$libc_type
3969 probe_libc host_
3970 test -n "$host_libc_type" && enable host_libc_$host_libc_type
3971
3972 case $libc_type in
3973     bionic)
3974         add_compat strtod.o strtod=avpriv_strtod
3975         ;;
3976 esac
3977
3978 # hacks for compiler/libc/os combinations
3979
3980 if enabled_all tms470 libc_glibc; then
3981     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
3982     add_cppflags -D__USER_LABEL_PREFIX__=
3983     add_cppflags -D__builtin_memset=memset
3984     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
3985     add_cflags   -pds=48    # incompatible redefinition of macro
3986 fi
3987
3988 if enabled_all ccc libc_glibc; then
3989     add_ldflags -Wl,-z,now  # calls to libots crash without this
3990 fi
3991
3992 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
3993     add_cppflags '-I\$(SRC_PATH)/compat/float'
3994
3995 esc(){
3996     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
3997 }
3998
3999 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
4000
4001 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4002
4003 set_default $PATHS_LIST
4004 set_default nm
4005
4006 # we need to build at least one lib type
4007 if ! enabled_any static shared; then
4008     cat <<EOF
4009 At least one library type must be built.
4010 Specify --enable-static to build the static libraries or --enable-shared to
4011 build the shared libraries as well. To only build the shared libraries specify
4012 --disable-static in addition to --enable-shared.
4013 EOF
4014     exit 1;
4015 fi
4016
4017 die_license_disabled() {
4018     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
4019 }
4020
4021 die_license_disabled gpl libcdio
4022 die_license_disabled gpl libx264
4023 die_license_disabled gpl libx265
4024 die_license_disabled gpl libxavs
4025 die_license_disabled gpl libxvid
4026 die_license_disabled gpl x11grab
4027
4028 die_license_disabled nonfree cuda
4029 die_license_disabled nonfree libfaac
4030 die_license_disabled nonfree libfdk_aac
4031 die_license_disabled nonfree libnpp
4032 die_license_disabled nonfree nvenc
4033 die_license_disabled nonfree openssl
4034
4035 die_license_disabled version3 libopencore_amrnb
4036 die_license_disabled version3 libopencore_amrwb
4037 die_license_disabled version3 libvo_aacenc
4038 die_license_disabled version3 libvo_amrwbenc
4039
4040 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
4041
4042 disabled optimizations || check_cflags -fomit-frame-pointer
4043
4044 enable_weak_pic() {
4045     disabled pic && return
4046     enable pic
4047     add_cppflags -DPIC
4048     case "$target_os" in
4049     mingw*|cygwin*)
4050         ;;
4051     *)
4052         add_cflags -fPIC
4053         ;;
4054     esac
4055     add_asflags  -fPIC
4056 }
4057
4058 enabled pic && enable_weak_pic
4059
4060 check_cc <<EOF || die "Symbol mangling check failed."
4061 int ff_extern;
4062 EOF
4063 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4064 extern_prefix=${sym%%ff_extern*}
4065
4066 check_cc <<EOF && enable_weak inline_asm
4067 void foo(void) { __asm__ volatile ("" ::); }
4068 EOF
4069
4070 _restrict=
4071 for restrict_keyword in restrict __restrict__ __restrict; do
4072     check_cc <<EOF && _restrict=$restrict_keyword && break
4073 void foo(char * $restrict_keyword p);
4074 EOF
4075 done
4076
4077 check_cc <<EOF && enable pragma_deprecated
4078 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4079 EOF
4080
4081 check_cc <<EOF && enable attribute_packed
4082 struct { int x; } __attribute__((packed)) x;
4083 EOF
4084
4085 check_cc <<EOF && enable attribute_may_alias
4086 union { int x; } __attribute__((may_alias)) x;
4087 EOF
4088
4089 check_cc <<EOF || die "endian test failed"
4090 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4091 EOF
4092 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4093
4094 check_gas() {
4095     log "check_gas using '$as' as AS"
4096     # :vararg is used on aarch64, arm and ppc altivec
4097     check_as <<EOF || return 1
4098 .macro m n, y:vararg=0
4099 \n: .int \y
4100 .endm
4101 m x
4102 EOF
4103     # .altmacro is only used in arm asm
4104     ! enabled arm || check_as <<EOF || return 1
4105 .altmacro
4106 EOF
4107     enable gnu_as
4108     return 0
4109 }
4110
4111 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4112     nogas=:
4113     enabled_any arm aarch64 && nogas=die
4114     enabled_all ppc altivec && nogas=warn
4115     as_noop=-v
4116
4117     case $as_type in
4118         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4119         gcc)  gaspp_as_type=gas ;;
4120         *)    gaspp_as_type=$as_type ;;
4121     esac
4122
4123     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4124
4125     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4126         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4127
4128     if ! check_gas ; then
4129         as=${gas:=$as}
4130         check_gas || \
4131             $nogas "GNU assembler not found, install/update gas-preprocessor"
4132     fi
4133
4134     check_as <<EOF && enable as_func
4135 .func test
4136 .endfunc
4137 EOF
4138 fi
4139
4140 check_inline_asm inline_asm_labels '"1:\n"'
4141
4142 if enabled aarch64; then
4143     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4144     # internal assembler in clang 3.3 does not support this instruction
4145     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4146     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4147
4148     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4149
4150 elif enabled alpha; then
4151
4152     check_cflags -mieee
4153
4154 elif enabled arm; then
4155
4156     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4157     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4158     enabled thumb && check_cflags -mthumb || check_cflags -marm
4159
4160     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4161         enable vfp_args
4162     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4163         enable vfp_args
4164     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4165         case "${cross_prefix:-$cc}" in
4166             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4167             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4168 __asm__ (".eabi_attribute 28, 1");
4169 int main(void) { return 0; }
4170 EOF
4171         esac
4172         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4173     fi
4174
4175     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4176     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4177     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4178     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4179     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4180     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4181
4182     [ $target_os = linux ] || [ $target_os = android ] ||
4183         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4184             $ARCH_EXT_LIST_ARM
4185
4186     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4187
4188     check_as <<EOF && enable as_dn_directive
4189 ra .dn d0.i16
4190 .unreq ra
4191 EOF
4192
4193     # llvm's integrated assembler supports .object_arch from llvm 3.5
4194     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4195 .object_arch armv4
4196 EOF
4197
4198     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4199
4200 elif enabled mips; then
4201
4202     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4203
4204     # make sure that only an instruction set is enabled
4205     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4206
4207     if enabled mips64; then
4208         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4209             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4210                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4211     else
4212         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4213             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4214                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4215     fi
4216
4217 elif enabled parisc; then
4218
4219     if enabled gcc; then
4220         case $($cc -dumpversion) in
4221             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4222         esac
4223     fi
4224
4225 elif enabled ppc; then
4226
4227     enable local_aligned_8 local_aligned_16
4228
4229     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4230     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4231     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4232     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4233
4234     # AltiVec flags: The FSF version of GCC differs from the Apple version
4235     if enabled altivec; then
4236         check_cflags -maltivec -mabi=altivec &&
4237         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4238         check_cflags -faltivec
4239
4240         # check if our compiler supports Motorola AltiVec C API
4241         check_cc <<EOF || disable altivec
4242 $inc_altivec_h
4243 int main(void) {
4244     vector signed int v1 = (vector signed int) { 0 };
4245     vector signed int v2 = (vector signed int) { 1 };
4246     v1 = vec_add(v1, v2);
4247     return 0;
4248 }
4249 EOF
4250
4251         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4252     fi
4253
4254     if enabled vsx; then
4255         check_cflags -mvsx &&
4256         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4257     fi
4258
4259     if enabled power8; then
4260         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4261     fi
4262
4263 elif enabled x86; then
4264
4265     check_builtin rdtsc    intrin.h   "__rdtsc()"
4266     check_builtin mm_empty mmintrin.h "_mm_empty()"
4267
4268     enable local_aligned_8 local_aligned_16
4269
4270     # check whether EBP is available on x86
4271     # As 'i' is stored on the stack, this program will crash
4272     # if the base pointer is used to access it because the
4273     # base pointer is cleared in the inline assembly code.
4274     check_exec_crash <<EOF && enable ebp_available
4275 volatile int i=0;
4276 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4277 return i;
4278 EOF
4279
4280     # check whether EBX is available on x86
4281     check_inline_asm ebx_available '""::"b"(0)' &&
4282         check_inline_asm ebx_available '"":::"%ebx"'
4283
4284     # check whether xmm clobbers are supported
4285     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4286
4287     # check whether binutils is new enough to compile SSSE3/MMXEXT
4288     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4289     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4290
4291     if ! disabled_any asm mmx yasm; then
4292         if check_cmd $yasmexe --version; then
4293             enabled x86_64 && yasm_extra="-m amd64"
4294             yasm_debug="-g dwarf2"
4295         elif check_cmd nasm -v; then
4296             yasmexe=nasm
4297             yasm_debug="-g -F dwarf"
4298             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4299         fi
4300
4301         YASMFLAGS="-f $objformat $yasm_extra"
4302         enabled pic               && append YASMFLAGS "-DPIC"
4303         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4304         case "$objformat" in
4305             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4306         esac
4307
4308         check_yasm "movbe ecx, [5]" && enable yasm ||
4309             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4310         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4311         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4312         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4313         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4314         check_yasm "CPU amdnop" || disable cpunop
4315     fi
4316
4317     case "$cpu" in
4318         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4319             disable fast_clz
4320         ;;
4321     esac
4322
4323 fi
4324
4325 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4326
4327 check_ldflags -Wl,--as-needed
4328
4329 if check_func dlopen; then
4330     ldl=
4331 elif check_func dlopen -ldl; then
4332     ldl=-ldl
4333 fi
4334
4335 if ! disabled network; then
4336     check_func getaddrinfo $network_extralibs
4337     check_func inet_aton $network_extralibs
4338
4339     check_type netdb.h "struct addrinfo"
4340     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4341     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4342     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4343     check_type poll.h "struct pollfd"
4344     check_type netinet/sctp.h "struct sctp_event_subscribe"
4345     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4346     check_type netinet/in.h "struct sockaddr_in6"
4347     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4348     check_type "sys/types.h sys/socket.h" socklen_t
4349
4350     # Prefer arpa/inet.h over winsock2
4351     if check_header arpa/inet.h ; then
4352         check_func closesocket
4353     elif check_header winsock2.h ; then
4354         check_func_headers winsock2.h closesocket -lws2 &&
4355             network_extralibs="-lws2" ||
4356         { check_func_headers winsock2.h closesocket -lws2_32 &&
4357             network_extralibs="-lws2_32"; } || disable winsock2_h network
4358         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4359
4360         check_type ws2tcpip.h socklen_t
4361         check_type ws2tcpip.h "struct addrinfo"
4362         check_type ws2tcpip.h "struct group_source_req"
4363         check_type ws2tcpip.h "struct ip_mreq_source"
4364         check_type ws2tcpip.h "struct ipv6_mreq"
4365         check_type winsock2.h "struct pollfd"
4366         check_struct winsock2.h "struct sockaddr" sa_len
4367         check_type ws2tcpip.h "struct sockaddr_in6"
4368         check_type ws2tcpip.h "struct sockaddr_storage"
4369     else
4370         disable network
4371     fi
4372 fi
4373
4374 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4375 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4376 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4377 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4378
4379 case "$custom_allocator" in
4380     jemalloc)
4381         # jemalloc by default does not use a prefix
4382         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4383     ;;
4384     tcmalloc)
4385         require_pkg_config libtcmalloc gperftools/tcmalloc.h tc_malloc
4386         malloc_prefix=tc_
4387     ;;
4388 esac
4389
4390 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4391 check_func  ${malloc_prefix}memalign            && enable memalign
4392 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4393
4394 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4395     check_func_headers time.h clock_gettime || { check_func_headers time.h clock_gettime -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
4396
4397 check_func  fcntl
4398 check_func  fork
4399 check_func  gethrtime
4400 check_func  getopt
4401 check_func  getrusage
4402 check_func  gettimeofday
4403 check_func  gmtime_r
4404 check_func  isatty
4405 check_func  localtime_r
4406 check_func  mach_absolute_time
4407 check_func  mkstemp
4408 check_func  mmap
4409 check_func  mprotect
4410 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4411 check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt; }
4412 check_func  sched_getaffinity
4413 check_func  setrlimit
4414 check_func  strerror_r
4415 check_func  sysconf
4416 check_func  sysctl
4417 check_func  usleep
4418
4419 check_func_headers io.h setmode
4420 check_func_headers stdlib.h getenv
4421
4422 check_func_headers windows.h CoTaskMemFree -lole32
4423 check_func_headers windows.h GetProcessAffinityMask
4424 check_func_headers windows.h GetProcessTimes
4425 check_func_headers windows.h GetSystemTimeAsFileTime
4426 check_func_headers windows.h LoadLibrary
4427 check_func_headers windows.h MapViewOfFile
4428 check_func_headers windows.h SetConsoleTextAttribute
4429 check_func_headers windows.h Sleep
4430 check_func_headers windows.h VirtualAlloc
4431 check_struct windows.h "CONDITION_VARIABLE" Ptr
4432
4433 check_header direct.h
4434 check_header dlfcn.h
4435 check_header d3d11.h
4436 check_header dxva.h
4437 check_header dxva2api.h
4438 check_header io.h
4439 check_header mach/mach_time.h
4440 check_header malloc.h
4441 check_header poll.h
4442 check_header sys/mman.h
4443 check_header sys/param.h
4444 check_header sys/resource.h
4445 check_header sys/select.h
4446 check_header sys/time.h
4447 check_header sys/un.h
4448 check_header unistd.h
4449 check_header valgrind/valgrind.h
4450 check_header vdpau/vdpau.h
4451 check_header vdpau/vdpau_x11.h
4452 check_header VideoDecodeAcceleration/VDADecoder.h
4453 check_header windows.h
4454 check_header X11/extensions/XvMClib.h
4455
4456 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
4457 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
4458 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
4459
4460 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4461
4462 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4463 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4464 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4465
4466 check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
4467
4468 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4469
4470 if ! disabled w32threads && ! enabled pthreads; then
4471     check_func_headers "windows.h process.h" _beginthreadex &&
4472         enable w32threads || disable w32threads
4473 fi
4474
4475 # check for some common methods of building with pthread support
4476 # do this before the optional library checks as some of them require pthreads
4477 if ! disabled pthreads && ! enabled w32threads; then
4478     enable pthreads
4479     if check_func pthread_join -pthread; then
4480         add_cflags -pthread
4481         add_extralibs -pthread
4482     elif check_func pthread_join -pthreads; then
4483         add_cflags -pthreads
4484         add_extralibs -pthreads
4485     elif check_func pthread_join -lpthreadGC2; then
4486         add_extralibs -lpthreadGC2
4487     elif check_lib pthread.h pthread_join -lpthread; then
4488         :
4489     elif ! check_func pthread_join; then
4490         disable pthreads
4491     fi
4492 fi
4493
4494 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
4495 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4496
4497 check_lib math.h sin -lm && LIBM="-lm"
4498 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4499
4500 atan2f_args=2
4501 ldexpf_args=2
4502 powf_args=2
4503
4504 for func in $MATH_FUNCS; do
4505     eval check_mathfunc $func \${${func}_args:-1}
4506 done
4507
4508 # these are off by default, so fail if requested and not available
4509 enabled avisynth          && { check_lib2 "avisynth/avisynth_c.h windows.h" LoadLibrary ||
4510                                check_lib2 "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl   ||
4511                                die "ERROR: LoadLibrary/dlopen not found, or avisynth header not found"; }
4512 enabled cuda              && check_lib cuda.h cuInit -lcuda
4513 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4514 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4515 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4516 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4517 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4518 enabled libfdk_aac        && require_pkg_config fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4519 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4520 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4521 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4522                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4523                                done || die "ERROR: libgsm not found"; }
4524 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4525 enabled libkvazaar        && require_pkg_config "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4526 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
4527 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4528 enabled libnpp            && require libnpp npp.h nppGetLibVersion -lnppi -lnppc
4529 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4530 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4531 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4532 enabled libopenh264       && require_pkg_config openh264 wels/codec_api.h WelsGetCodecVersion
4533 enabled libopenjpeg       && { { check_header openjpeg.h && check_lib2 openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC; } ||
4534                                { require_pkg_config libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; } }
4535 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4536 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4537 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4538 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4539 enabled libsnappy         && require snappy snappy-c.h snappy_compress -lsnappy
4540 enabled libspeex          && require_pkg_config speex speex/speex.h speex_decoder_init -lspeex
4541 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4542 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4543 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4544 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4545 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4546 enabled libvpx            && require_pkg_config "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4547     enabled libvpx_vp8_decoder && {
4548         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4549             disable libvpx_vp8_decoder;
4550     }
4551     enabled libvpx_vp8_encoder && {
4552         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4553             disable libvpx_vp8_encoder;
4554     }
4555     enabled libvpx_vp9_decoder && {
4556         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4557             disable libvpx_vp9_decoder;
4558     }
4559     enabled libvpx_vp9_encoder && {
4560         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4561             disable libvpx_vp9_encoder;
4562     }
4563     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4564         die "libvpx enabled but no supported decoders found"
4565     fi
4566 }
4567 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4568 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4569 enabled libx264           && require_pkg_config x264 "stdint.h x264.h" x264_encoder_encode &&
4570                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4571                                die "ERROR: libx264 version must be >= 0.118."; } &&
4572                              { check_cpp_condition x264.h "X264_MPEG2" &&
4573                                enable libx262; }
4574 enabled libx265           && require_pkg_config x265 x265.h x265_api_get &&
4575                              { check_cpp_condition x265.h "X265_BUILD >= 57" ||
4576                                die "ERROR: libx265 version must be >= 57."; }
4577 enabled libxavs           && require libxavs xavs.h xavs_encoder_encode -lxavs
4578 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4579 enabled mmal              && { check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4580                                 { ! enabled cross_compile && {
4581                                     add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline ;
4582                                     add_extralibs -L/opt/vc/lib/ -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ;
4583                                     check_lib interface/mmal/mmal.h mmal_port_connect ; }
4584                                 check_lib interface/mmal/mmal.h mmal_port_connect ; } ||
4585                                die "ERROR: mmal not found"; }
4586 enabled openssl           && { check_pkg_config openssl openssl/ssl.h SSL_library_init && {
4587                                add_cflags $openssl_cflags && add_extralibs $openssl_libs; }||
4588                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4589                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4590                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4591                                die "ERROR: openssl not found"; }
4592
4593 if enabled gnutls; then
4594     { check_lib2 gmp.h mpz_export -lgmp && enable gmp; } ||
4595     { check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }
4596 fi
4597
4598 # libdc1394 check
4599 if enabled libdc1394; then
4600     { require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new &&
4601         enable libdc1394_2; } ||
4602     { check_lib libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394 &&
4603         enable libdc1394_1; } ||
4604     die "ERROR: No version of libdc1394 found "
4605 fi
4606
4607 if enabled nvenc; then
4608     enabled cuda || check_header cuda.h || die "ERROR: cuda.h not found.";
4609     check_header nvEncodeAPI.h || die "ERROR: nvEncodeAPI.h not found.";
4610     check_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 5" ||
4611         die "ERROR: NVENC API version 4 or older is not supported";
4612 fi
4613
4614 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4615     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4616     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4617     enable sdl
4618 fi
4619
4620 pod2man --help     > /dev/null 2>&1 && enable pod2man   || disable pod2man
4621 texi2html -version > /dev/null 2>&1 && enable texi2html || disable texi2html
4622
4623 check_header linux/fb.h
4624 check_header linux/videodev2.h
4625 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4626
4627 check_header AVFoundation/AVFoundation.h &&
4628     check_objcflags -fobjc-arc &&
4629     add_extralibs -framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia ||
4630     disable AVFoundation_AVFoundation_h
4631
4632 check_header sys/videoio.h
4633
4634 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
4635 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4636 # w32api 3.12 had it defined wrong
4637 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4638
4639 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4640 { check_header dev/bktr/ioctl_meteor.h &&
4641   check_header dev/bktr/ioctl_bt848.h; } ||
4642 { check_header machine/ioctl_meteor.h &&
4643   check_header machine/ioctl_bt848.h; } ||
4644 { check_header dev/video/meteor/ioctl_meteor.h &&
4645   check_header dev/video/bktr/ioctl_bt848.h; } ||
4646 check_header dev/ic/bt8xx.h
4647
4648 check_header sndio.h
4649 check_header sys/soundcard.h
4650 check_header soundcard.h
4651
4652 enabled_any alsa_indev alsa_outdev &&
4653     check_lib2 alsa/asoundlib.h snd_pcm_htimestamp -lasound
4654
4655 enabled jack_indev && check_lib2 jack/jack.h jack_client_open -ljack &&
4656     check_func jack_port_get_latency_range -ljack
4657
4658 enabled_any sndio_indev sndio_outdev && check_lib2 sndio.h sio_open -lsndio
4659
4660 if enabled libcdio; then
4661     check_lib2 "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4662     check_lib2 "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4663     die "ERROR: No usable libcdio/cdparanoia found"
4664 fi
4665
4666 check_lib X11/Xlib.h XOpenDisplay -lX11 && enable xlib
4667
4668 if enabled libxcb || enabled x11grab && ! disabled libxcb; then
4669     check_pkg_config xcb-shape xcb/shape.h xcb_shape_rectangles || {
4670         enabled libxcb && die "ERROR: libxcb not found";
4671     } && disable x11grab && enable libxcb
4672
4673     disabled libxcb_shm ||
4674         check_pkg_config xcb-shm xcb/shm.h xcb_shm_attach || {
4675             enabled libxcb_shm && die "ERROR: libxcb_shm not found";
4676         } && check_header sys/shm.h && enable libxcb_shm
4677
4678     disabled libxcb_xfixes ||
4679         check_pkg_config xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image || {
4680             enabled libxcb_xfixes && die "ERROR: libxcb_xfixes not found";
4681         } && enable libxcb_xfixes
4682
4683     add_cflags "$xcb_event_cflags $xcb_shm_cflags $xcb_xfixes_cflags"
4684     add_extralibs "$xcb_event_libs $xcb_shm_libs $xcb_xfixes_libs"
4685 fi
4686
4687 if enabled x11grab; then
4688     enabled xlib || die "ERROR: Xlib not found"
4689     require Xext X11/extensions/XShm.h XShmCreateImage -lXext
4690     require Xfixes X11/extensions/Xfixes.h XFixesGetCursorImage -lXfixes
4691 fi
4692
4693 enabled vaapi &&
4694     check_code cc "va/va.h" "vaCreateSurfaces(0, 0, 0, 0, 0, 0, 0, 0)" ||
4695     disable vaapi
4696
4697 enabled vaapi && enabled xlib &&
4698     check_lib2 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 &&
4699     enable vaapi_x11
4700
4701 enabled vdpau &&
4702     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4703     disable vdpau
4704
4705 enabled vdpau && enabled xlib &&
4706     check_func_headers "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau &&
4707     prepend avconv_libs $($ldflags_filter "-lvdpau") &&
4708     enable vdpau_x11
4709
4710 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4711
4712 # add some useful compiler flags if supported
4713 check_cflags -Wdeclaration-after-statement
4714 check_cflags -Wall
4715 check_cflags -Wdisabled-optimization
4716 check_cflags -Wpointer-arith
4717 check_cflags -Wredundant-decls
4718 check_cflags -Wwrite-strings
4719 check_cflags -Wtype-limits
4720 check_cflags -Wundef
4721 check_cflags -Wmissing-prototypes
4722 check_cflags -Wstrict-prototypes
4723 enabled extra_warnings && check_cflags -Winline
4724 enabled extra_warnings && check_cflags -Wcast-qual
4725
4726 check_disable_warning(){
4727     warning_flag=-W${1#-Wno-}
4728     test_cflags $warning_flag && add_cflags $1
4729 }
4730
4731 check_disable_warning -Wno-parentheses
4732 check_disable_warning -Wno-switch
4733 check_disable_warning -Wno-format-zero-length
4734 check_disable_warning -Wno-pointer-sign
4735
4736 # add some linker flags
4737 check_ldflags -Wl,--warn-common
4738 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4739 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir
4740 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
4741
4742 # add some strip flags
4743 # -wN '..@*' is more selective than -x, but not available everywhere.
4744 check_stripflags -wN \'..@*\' || check_stripflags -x || strip='true'
4745
4746 enabled neon_clobber_test &&
4747     check_ldflags -Wl,--wrap,avcodec_open2              \
4748                   -Wl,--wrap,avcodec_decode_audio4      \
4749                   -Wl,--wrap,avcodec_decode_video2      \
4750                   -Wl,--wrap,avcodec_decode_subtitle2   \
4751                   -Wl,--wrap,avcodec_encode_audio2      \
4752                   -Wl,--wrap,avcodec_encode_video2      \
4753                   -Wl,--wrap,avcodec_encode_subtitle    \
4754                   -Wl,--wrap,avresample_convert ||
4755     disable neon_clobber_test
4756
4757 enabled xmm_clobber_test &&
4758     check_ldflags -Wl,--wrap,avcodec_open2              \
4759                   -Wl,--wrap,avcodec_decode_audio4      \
4760                   -Wl,--wrap,avcodec_decode_video2      \
4761                   -Wl,--wrap,avcodec_decode_subtitle2   \
4762                   -Wl,--wrap,avcodec_encode_audio2      \
4763                   -Wl,--wrap,avcodec_encode_video2      \
4764                   -Wl,--wrap,avcodec_encode_subtitle    \
4765                   -Wl,--wrap,avresample_convert         \
4766                   -Wl,--wrap,sws_scale ||
4767     disable xmm_clobber_test
4768
4769 echo "X { local: *; };" > $TMPV
4770 if test_ldflags -Wl,--version-script,$TMPV; then
4771     append SHFLAGS '-Wl,--version-script,\$(SUBDIR)lib\$(NAME).ver'
4772 elif test_ldflags -Wl,-M,$TMPV; then
4773     append SHFLAGS '-Wl,-M,\$(SUBDIR)lib\$(NAME).ver-sol2'
4774 fi
4775
4776 check_cc <<EOF && enable symver_asm_label
4777 void ff_foo(void) __asm__ ("av_foo@VERSION");
4778 void ff_foo(void) { ${inline_asm+__asm__($quotes);} }
4779 EOF
4780     check_cc <<EOF && enable symver_gnu_asm
4781 __asm__(".symver ff_foo,av_foo@VERSION");
4782 void ff_foo(void) {}
4783 EOF
4784
4785 if [ -z "$optflags" ]; then
4786     if enabled small; then
4787         optflags=$cflags_size
4788     elif enabled optimizations; then
4789         optflags=$cflags_speed
4790     else
4791         optflags=$cflags_noopt
4792     fi
4793 fi
4794
4795 check_optflags(){
4796     check_cflags "$@"
4797     enabled lto && check_ldflags "$@"
4798 }
4799
4800
4801 if enabled lto; then
4802     test "$cc_type" != "$ld_type" && die "LTO requires same compiler and linker"
4803     check_cflags  -flto
4804     check_ldflags -flto $cpuflags
4805 fi