lavc: VAAPI encode common infrastructure
[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_drm
1640     vaapi_x11
1641     vdpau_x11
1642     xlib
1643 "
1644
1645 # options emitted with CONFIG_ prefix but not available on the command line
1646 CONFIG_EXTRA="
1647     aandcttables
1648     ac3dsp
1649     audio_frame_queue
1650     audiodsp
1651     blockdsp
1652     bswapdsp
1653     cabac
1654     dirac_parse
1655     dvprofile
1656     faandct
1657     faanidct
1658     fdctdsp
1659     flacdsp
1660     fmtconvert
1661     g722dsp
1662     gcrypt
1663     gmp
1664     golomb
1665     gplv3
1666     h263dsp
1667     h264chroma
1668     h264dsp
1669     h264pred
1670     h264qpel
1671     hpeldsp
1672     huffman
1673     huffyuvdsp
1674     huffyuvencdsp
1675     idctdsp
1676     iirfilter
1677     imdct15
1678     intrax8
1679     iso_media
1680     ividsp
1681     jpegtables
1682     libx262
1683     lgplv3
1684     lpc
1685     lzf
1686     me_cmp
1687     mpeg_er
1688     mpegaudio
1689     mpegaudiodsp
1690     mpegvideo
1691     mpegvideoenc
1692     mss34dsp
1693     pixblockdsp
1694     qpeldsp
1695     qsv
1696     qsvdec
1697     qsvenc
1698     rangecoder
1699     riffdec
1700     riffenc
1701     rtpdec
1702     rtpenc_chain
1703     rv34dsp
1704     sinewin
1705     snappy
1706     srtp
1707     startcode
1708     texturedsp
1709     texturedspenc
1710     tpeldsp
1711     vaapi_encode
1712     vc1dsp
1713     videodsp
1714     vp3dsp
1715     vp56dsp
1716     vp8dsp
1717     wma_freqs
1718     wmv2dsp
1719 "
1720
1721 CMDLINE_SELECT="
1722     $ARCH_EXT_LIST
1723     $CONFIG_LIST
1724     $HAVE_LIST_CMDLINE
1725     $THREADS_LIST
1726     asm
1727     cross_compile
1728     debug
1729     extra_warnings
1730     logging
1731     lto
1732     optimizations
1733     rpath
1734 "
1735
1736 PATHS_LIST="
1737     bindir
1738     datadir
1739     docdir
1740     incdir
1741     libdir
1742     mandir
1743     prefix
1744     shlibdir
1745 "
1746
1747 CMDLINE_SET="
1748     $PATHS_LIST
1749     ar
1750     arch
1751     as
1752     build_suffix
1753     cc
1754     objcc
1755     cpu
1756     cross_prefix
1757     custom_allocator
1758     dep_cc
1759     env
1760     extra_version
1761     host_cc
1762     host_cflags
1763     host_ld
1764     host_ldflags
1765     host_libs
1766     host_os
1767     ld
1768     logfile
1769     malloc_prefix
1770     nm
1771     optflags
1772     pkg_config
1773     pkg_config_flags
1774     random_seed
1775     samples
1776     sysinclude
1777     sysroot
1778     target_exec
1779     target_os
1780     target_path
1781     target_samples
1782     toolchain
1783 "
1784
1785 CMDLINE_APPEND="
1786     extra_cflags
1787     extra_objcflags
1788     host_cppflags
1789 "
1790
1791 # code dependency declarations
1792
1793 # architecture extensions
1794
1795 armv5te_deps="arm"
1796 armv6_deps="arm"
1797 armv6t2_deps="arm"
1798 armv8_deps="aarch64"
1799 neon_deps_any="aarch64 arm"
1800 intrinsics_neon_deps="neon"
1801 vfp_deps_any="aarch64 arm"
1802 vfpv3_deps="vfp"
1803
1804 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1805
1806 altivec_deps="ppc"
1807 ppc4xx_deps="ppc"
1808 vsx_deps="altivec"
1809 power8_deps="vsx"
1810
1811 cpunop_deps="i686"
1812 x86_64_select="i686"
1813 x86_64_suggest="fast_cmov"
1814
1815 amd3dnow_deps="mmx"
1816 amd3dnowext_deps="amd3dnow"
1817 i686_deps="x86"
1818 mmx_deps="x86"
1819 mmxext_deps="mmx"
1820 sse_deps="mmxext"
1821 sse2_deps="sse"
1822 sse3_deps="sse2"
1823 ssse3_deps="sse3"
1824 sse4_deps="ssse3"
1825 sse42_deps="sse4"
1826 avx_deps="sse42"
1827 xop_deps="avx"
1828 fma3_deps="avx"
1829 fma4_deps="avx"
1830 avx2_deps="avx"
1831
1832 mmx_external_deps="yasm"
1833 mmx_inline_deps="inline_asm"
1834 mmx_suggest="mmx_external mmx_inline"
1835
1836 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1837     eval dep=\$${ext}_deps
1838     eval ${ext}_external_deps='"${dep}_external"'
1839     eval ${ext}_inline_deps='"${dep}_inline"'
1840     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1841 done
1842
1843 aligned_stack_if_any="aarch64 ppc x86"
1844 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1845 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1846 fast_unaligned_if_any="aarch64 ppc x86"
1847 simd_align_16_if_any="altivec neon sse"
1848
1849 # system capabilities
1850 symver_if_any="symver_asm_label symver_gnu_asm"
1851 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
1852
1853 # threading support
1854 atomics_gcc_if="sync_val_compare_and_swap"
1855 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1856 atomics_win32_if="MemoryBarrier"
1857 atomics_native_if_any="$ATOMICS_LIST"
1858 w32threads_deps="atomics_native"
1859 threads_if_any="$THREADS_LIST"
1860
1861 # subsystems
1862 dct_select="rdft"
1863 dirac_parse_select="golomb"
1864 error_resilience_select="me_cmp"
1865 faandct_deps="faan fdctdsp"
1866 faanidct_deps="faan idctdsp"
1867 h264dsp_select="startcode"
1868 intrax8_select="blockdsp idctdsp"
1869 mdct_select="fft"
1870 rdft_select="fft"
1871 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1872 mpeg_er_select="error_resilience"
1873 mpegaudio_select="mpegaudiodsp"
1874 mpegaudiodsp_select="dct"
1875 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp mpeg_er videodsp"
1876 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1877 nvenc_deps_any="dlopen LoadLibrary"
1878 nvenc_extralibs='$ldl'
1879 qsvdec_select="qsv"
1880 qsvenc_select="qsv"
1881 vaapi_encode_deps="vaapi"
1882 vc1dsp_select="h264chroma qpeldsp startcode"
1883
1884 # decoders / encoders
1885 aac_decoder_select="imdct15 mdct sinewin"
1886 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1887 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1888 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1889 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1890 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1891 adpcm_g722_decoder_select="g722dsp"
1892 adpcm_g722_encoder_select="g722dsp"
1893 aic_decoder_select="golomb idctdsp"
1894 alac_encoder_select="lpc"
1895 als_decoder_select="bswapdsp"
1896 amrnb_decoder_select="lsp"
1897 amrwb_decoder_select="lsp"
1898 amv_decoder_select="sp5x_decoder"
1899 ape_decoder_select="bswapdsp"
1900 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1901 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1902 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1903 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1904 atrac1_decoder_select="mdct sinewin"
1905 atrac3_decoder_select="mdct"
1906 atrac3p_decoder_select="mdct sinewin"
1907 bink_decoder_select="blockdsp hpeldsp"
1908 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1909 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1910 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1911 cllc_decoder_select="bswapdsp"
1912 comfortnoise_encoder_select="lpc"
1913 cook_decoder_select="audiodsp mdct sinewin"
1914 cscd_decoder_select="lzo"
1915 cscd_decoder_suggest="zlib"
1916 dca_decoder_select="fmtconvert mdct"
1917 dds_decoder_select="texturedsp"
1918 dnxhd_decoder_select="blockdsp idctdsp"
1919 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1920 dvvideo_decoder_select="dvprofile idctdsp"
1921 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1922 dxa_decoder_deps="zlib"
1923 dxv_decoder_select="lzf texturedsp"
1924 eac3_decoder_select="ac3_decoder"
1925 eac3_encoder_select="ac3_encoder"
1926 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1927 eatgq_decoder_select="aandcttables idctdsp"
1928 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
1929 exr_decoder_deps="zlib"
1930 ffv1_decoder_select="golomb rangecoder"
1931 ffv1_encoder_select="rangecoder"
1932 ffvhuff_decoder_select="huffyuv_decoder"
1933 ffvhuff_encoder_select="huffyuv_encoder"
1934 fic_decoder_select="golomb"
1935 flac_decoder_select="flacdsp golomb"
1936 flac_encoder_select="bswapdsp flacdsp golomb lpc"
1937 flashsv_decoder_deps="zlib"
1938 flashsv_encoder_deps="zlib"
1939 flashsv2_decoder_deps="zlib"
1940 flv_decoder_select="h263_decoder"
1941 flv_encoder_select="h263_encoder"
1942 fourxm_decoder_select="blockdsp bswapdsp"
1943 fraps_decoder_select="bswapdsp huffman"
1944 g2m_decoder_deps="zlib"
1945 g2m_decoder_select="blockdsp idctdsp jpegtables"
1946 h261_decoder_select="mpeg_er mpegvideo"
1947 h261_encoder_select="aandcttables mpegvideoenc"
1948 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
1949 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1950 h263i_decoder_select="h263_decoder"
1951 h263p_encoder_select="h263_encoder"
1952 h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel videodsp"
1953 h264_decoder_suggest="error_resilience"
1954 h264_nvenc_encoder_deps="nvenc"
1955 h264_qsv_decoder_deps="libmfx"
1956 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
1957 h264_qsv_encoder_deps="libmfx"
1958 h264_qsv_encoder_select="qsvenc"
1959 hap_decoder_select="snappy texturedsp"
1960 hap_encoder_deps="libsnappy"
1961 hap_encoder_select="texturedspenc"
1962 hevc_decoder_select="bswapdsp cabac golomb videodsp"
1963 hevc_nvenc_encoder_deps="nvenc"
1964 hevc_qsv_encoder_deps="libmfx"
1965 hevc_qsv_decoder_deps="libmfx"
1966 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser qsvdec hevc_qsv_hwaccel"
1967 hevc_qsv_encoder_select="qsvenc"
1968 huffyuv_decoder_select="bswapdsp huffyuvdsp"
1969 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
1970 iac_decoder_select="imc_decoder"
1971 imc_decoder_select="bswapdsp fft mdct sinewin"
1972 indeo3_decoder_select="hpeldsp"
1973 indeo4_decoder_select="ividsp"
1974 indeo5_decoder_select="ividsp"
1975 interplay_video_decoder_select="hpeldsp"
1976 jpegls_decoder_select="golomb mjpeg_decoder"
1977 jpegls_encoder_select="golomb"
1978 jv_decoder_select="blockdsp"
1979 lagarith_decoder_select="huffyuvdsp"
1980 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
1981 loco_decoder_select="golomb"
1982 mdec_decoder_select="blockdsp idctdsp mpegvideo"
1983 metasound_decoder_select="lsp mdct sinewin"
1984 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
1985 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
1986 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
1987 mjpegb_decoder_select="mjpeg_decoder"
1988 mlp_decoder_select="mlp_parser"
1989 motionpixels_decoder_select="bswapdsp"
1990 mp1_decoder_select="mpegaudio"
1991 mp1float_decoder_select="mpegaudio"
1992 mp2_decoder_select="mpegaudio"
1993 mp2float_decoder_select="mpegaudio"
1994 mp3_decoder_select="mpegaudio"
1995 mp3adu_decoder_select="mpegaudio"
1996 mp3adufloat_decoder_select="mpegaudio"
1997 mp3float_decoder_select="mpegaudio"
1998 mp3on4_decoder_select="mpegaudio"
1999 mp3on4float_decoder_select="mpegaudio"
2000 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2001 mpc8_decoder_select="mpegaudiodsp"
2002 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2003 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2004 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2005 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2006 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2007 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2008 mpeg2_qsv_decoder_deps="libmfx"
2009 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2010 mpeg2_qsv_encoder_deps="libmfx"
2011 mpeg2_qsv_encoder_select="qsvenc"
2012 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2013 mpeg4_encoder_select="h263_encoder"
2014 msa1_decoder_select="mss34dsp"
2015 msmpeg4v1_decoder_select="h263_decoder"
2016 msmpeg4v2_decoder_select="h263_decoder"
2017 msmpeg4v2_encoder_select="h263_encoder"
2018 msmpeg4v3_decoder_select="h263_decoder"
2019 msmpeg4v3_encoder_select="h263_encoder"
2020 mss2_decoder_select="error_resilience mpeg_er mpegvideo vc1_decoder"
2021 mts2_decoder_select="mss34dsp"
2022 mxpeg_decoder_select="mjpeg_decoder"
2023 nellymoser_decoder_select="mdct sinewin"
2024 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2025 nuv_decoder_select="idctdsp lzo"
2026 nvenc_h264_encoder_deps="nvenc"
2027 nvenc_hevc_encoder_deps="nvenc"
2028 on2avc_decoder_select="mdct"
2029 opus_decoder_deps="avresample"
2030 opus_decoder_select="imdct15"
2031 png_decoder_deps="zlib"
2032 png_encoder_deps="zlib"
2033 png_encoder_select="huffyuvencdsp"
2034 prores_decoder_select="idctdsp"
2035 prores_encoder_select="fdctdsp"
2036 qcelp_decoder_select="lsp"
2037 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2038 ra_144_encoder_select="audio_frame_queue lpc"
2039 ralf_decoder_select="golomb"
2040 rscc_decoder_deps="zlib"
2041 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2042 rv10_encoder_select="h263_encoder"
2043 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2044 rv20_encoder_select="h263_encoder"
2045 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2046 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2047 screenpresso_decoder_deps="zlib"
2048 shorten_decoder_select="golomb"
2049 sipr_decoder_select="lsp"
2050 sp5x_decoder_select="mjpeg_decoder"
2051 svq1_decoder_select="hpeldsp"
2052 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2053 svq3_decoder_select="golomb h264dsp h264pred hpeldsp tpeldsp videodsp"
2054 svq3_decoder_suggest="zlib"
2055 tak_decoder_select="audiodsp"
2056 tdsc_decoder_deps="zlib"
2057 tdsc_decoder_select="mjpeg_decoder"
2058 theora_decoder_select="vp3_decoder"
2059 thp_decoder_select="mjpeg_decoder"
2060 tiff_decoder_suggest="zlib"
2061 tiff_encoder_suggest="zlib"
2062 truehd_decoder_select="mlp_decoder"
2063 truemotion2_decoder_select="bswapdsp"
2064 truespeech_decoder_select="bswapdsp"
2065 tscc_decoder_deps="zlib"
2066 txd_decoder_select="texturedsp"
2067 twinvq_decoder_select="mdct lsp sinewin"
2068 utvideo_decoder_select="bswapdsp"
2069 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2070 vble_decoder_select="huffyuvdsp"
2071 vc1_decoder_select="blockdsp error_resilience h263_decoder h264qpel intrax8 mpeg_er mpegvideo vc1dsp"
2072 vc1image_decoder_select="vc1_decoder"
2073 vorbis_decoder_select="mdct"
2074 vorbis_encoder_select="mdct"
2075 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2076 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2077 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2078 vp6a_decoder_select="vp6_decoder"
2079 vp6f_decoder_select="vp6_decoder"
2080 vp7_decoder_select="h264pred videodsp vp8dsp"
2081 vp8_decoder_select="h264pred videodsp vp8dsp"
2082 vp9_decoder_select="videodsp"
2083 webp_decoder_select="vp8_decoder"
2084 wmapro_decoder_select="mdct sinewin wma_freqs"
2085 wmav1_decoder_select="mdct sinewin wma_freqs"
2086 wmav1_encoder_select="mdct sinewin wma_freqs"
2087 wmav2_decoder_select="mdct sinewin wma_freqs"
2088 wmav2_encoder_select="mdct sinewin wma_freqs"
2089 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2090 wmv1_decoder_select="h263_decoder"
2091 wmv1_encoder_select="h263_encoder"
2092 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2093 wmv2_encoder_select="h263_encoder wmv2dsp"
2094 wmv3_decoder_select="vc1_decoder"
2095 wmv3image_decoder_select="wmv3_decoder"
2096 zerocodec_decoder_deps="zlib"
2097 zlib_decoder_deps="zlib"
2098 zlib_encoder_deps="zlib"
2099 zmbv_decoder_deps="zlib"
2100 zmbv_encoder_deps="zlib"
2101
2102 # hardware accelerators
2103 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2104 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2105 vaapi_deps="va_va_h"
2106 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2107 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2108 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2109
2110 h263_vaapi_hwaccel_deps="vaapi"
2111 h263_vaapi_hwaccel_select="h263_decoder"
2112 h264_d3d11va_hwaccel_deps="d3d11va"
2113 h264_d3d11va_hwaccel_select="h264_decoder"
2114 h264_dxva2_hwaccel_deps="dxva2"
2115 h264_dxva2_hwaccel_select="h264_decoder"
2116 h264_mmal_decoder_deps="mmal"
2117 h264_mmal_hwaccel_deps="mmal"
2118 h264_mmal_decoder_select="h264_decoder"
2119 h264_mmal_encoder_deps="mmal"
2120 h264_qsv_hwaccel_deps="libmfx"
2121 h264_vaapi_hwaccel_deps="vaapi"
2122 h264_vaapi_hwaccel_select="h264_decoder"
2123 h264_vda_hwaccel_deps="vda"
2124 h264_vda_hwaccel_select="h264_decoder"
2125 h264_vda_old_hwaccel_deps="vda"
2126 h264_vda_old_hwaccel_select="h264_decoder"
2127 h264_vdpau_hwaccel_deps="vdpau"
2128 h264_vdpau_hwaccel_select="h264_decoder"
2129 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2130 hevc_d3d11va_hwaccel_select="hevc_decoder"
2131 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2132 hevc_dxva2_hwaccel_select="hevc_decoder"
2133 hevc_qsv_hwaccel_deps="libmfx"
2134 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2135 hevc_vdpau_hwaccel_select="hevc_decoder"
2136 mpeg1_vdpau_hwaccel_deps="vdpau"
2137 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2138 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2139 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2140 mpeg2_dxva2_hwaccel_deps="dxva2"
2141 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2142 mpeg2_qsv_hwaccel_deps="libmfx"
2143 mpeg2_vaapi_hwaccel_deps="vaapi"
2144 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2145 mpeg2_vdpau_hwaccel_deps="vdpau"
2146 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2147 mpeg4_vaapi_hwaccel_deps="vaapi"
2148 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2149 mpeg4_vdpau_hwaccel_deps="vdpau"
2150 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2151 vc1_d3d11va_hwaccel_deps="d3d11va"
2152 vc1_d3d11va_hwaccel_select="vc1_decoder"
2153 vc1_dxva2_hwaccel_deps="dxva2"
2154 vc1_dxva2_hwaccel_select="vc1_decoder"
2155 vc1_vaapi_hwaccel_deps="vaapi"
2156 vc1_vaapi_hwaccel_select="vc1_decoder"
2157 vc1_vdpau_hwaccel_deps="vdpau"
2158 vc1_vdpau_hwaccel_select="vc1_decoder"
2159 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2160 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2161 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2162 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2163
2164 # parsers
2165 h264_parser_select="h264_decoder"
2166 hevc_parser_select="golomb"
2167 mpegvideo_parser_select="mpegvideo"
2168 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2169 vc1_parser_select="vc1dsp"
2170
2171 # bitstream_filters
2172 mjpeg2jpeg_bsf_select="jpegtables"
2173
2174 # external libraries
2175 libdcadec_decoder_deps="libdcadec"
2176 libfaac_encoder_deps="libfaac"
2177 libfaac_encoder_select="audio_frame_queue"
2178 libfdk_aac_decoder_deps="libfdk_aac"
2179 libfdk_aac_encoder_deps="libfdk_aac"
2180 libfdk_aac_encoder_select="audio_frame_queue"
2181 libgsm_decoder_deps="libgsm"
2182 libgsm_encoder_deps="libgsm"
2183 libgsm_ms_decoder_deps="libgsm"
2184 libgsm_ms_encoder_deps="libgsm"
2185 libilbc_decoder_deps="libilbc"
2186 libilbc_encoder_deps="libilbc"
2187 libkvazaar_encoder_deps="libkvazaar"
2188 libmp3lame_encoder_deps="libmp3lame"
2189 libmp3lame_encoder_select="audio_frame_queue"
2190 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2191 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2192 libopencore_amrnb_encoder_select="audio_frame_queue"
2193 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2194 libopenh264_encoder_deps="libopenh264"
2195 libopenjpeg_decoder_deps="libopenjpeg"
2196 libopenjpeg_encoder_deps="libopenjpeg"
2197 libopus_decoder_deps="libopus"
2198 libopus_encoder_deps="libopus"
2199 libopus_encoder_select="audio_frame_queue"
2200 libschroedinger_decoder_deps="libschroedinger"
2201 libschroedinger_encoder_deps="libschroedinger"
2202 libspeex_decoder_deps="libspeex"
2203 libspeex_encoder_deps="libspeex"
2204 libspeex_encoder_select="audio_frame_queue"
2205 libtheora_encoder_deps="libtheora"
2206 libtwolame_encoder_deps="libtwolame"
2207 libvo_aacenc_encoder_deps="libvo_aacenc"
2208 libvo_aacenc_encoder_select="audio_frame_queue"
2209 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2210 libvorbis_encoder_deps="libvorbis"
2211 libvorbis_encoder_select="audio_frame_queue"
2212 libvpx_vp8_decoder_deps="libvpx"
2213 libvpx_vp8_encoder_deps="libvpx"
2214 libvpx_vp9_decoder_deps="libvpx"
2215 libvpx_vp9_encoder_deps="libvpx"
2216 libwavpack_encoder_deps="libwavpack"
2217 libwebp_encoder_deps="libwebp"
2218 libx262_encoder_deps="libx262"
2219 libx264_encoder_deps="libx264"
2220 libx265_encoder_deps="libx265"
2221 libxavs_encoder_deps="libxavs"
2222 libxvid_encoder_deps="libxvid"
2223
2224 # demuxers / muxers
2225 ac3_demuxer_select="ac3_parser"
2226 asf_demuxer_select="riffdec"
2227 asf_muxer_select="riffenc"
2228 asf_stream_muxer_select="asf_muxer"
2229 avi_demuxer_select="iso_media riffdec"
2230 avi_muxer_select="riffenc"
2231 avisynth_demuxer_deps="avisynth"
2232 avisynth_demuxer_select="riffdec"
2233 caf_demuxer_select="iso_media riffdec"
2234 dash_muxer_select="mp4_muxer"
2235 dirac_demuxer_select="dirac_parser"
2236 dv_demuxer_select="dvprofile"
2237 dv_muxer_select="dvprofile"
2238 dxa_demuxer_select="riffdec"
2239 eac3_demuxer_select="ac3_parser"
2240 f4v_muxer_select="mov_muxer"
2241 flac_demuxer_select="flac_parser"
2242 hds_muxer_select="flv_muxer"
2243 hls_muxer_select="mpegts_muxer"
2244 ipod_muxer_select="mov_muxer"
2245 ismv_muxer_select="mov_muxer"
2246 matroska_audio_muxer_select="matroska_muxer"
2247 matroska_demuxer_select="iso_media riffdec"
2248 matroska_demuxer_suggest="bzlib lzo zlib"
2249 matroska_muxer_select="iso_media riffenc"
2250 mmf_muxer_select="riffenc"
2251 mov_demuxer_select="iso_media riffdec"
2252 mov_demuxer_suggest="zlib"
2253 mov_muxer_select="iso_media riffenc rtpenc_chain"
2254 mp3_demuxer_select="mpegaudio_parser"
2255 mp4_muxer_select="mov_muxer"
2256 mpegts_demuxer_select="iso_media"
2257 mpegts_muxer_select="adts_muxer latm_muxer"
2258 mpegtsraw_demuxer_select="mpegts_demuxer"
2259 mxf_d10_muxer_select="mxf_muxer"
2260 nut_muxer_select="riffenc"
2261 nuv_demuxer_select="riffdec"
2262 oga_muxer_select="ogg_muxer"
2263 ogg_demuxer_select="dirac_parse"
2264 opus_muxer_select="ogg_muxer"
2265 psp_muxer_select="mov_muxer"
2266 rtp_demuxer_select="sdp_demuxer"
2267 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2268 rtsp_demuxer_select="http_protocol rtpdec"
2269 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2270 sap_demuxer_select="sdp_demuxer"
2271 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2272 sdp_demuxer_select="rtpdec"
2273 smoothstreaming_muxer_select="ismv_muxer"
2274 spdif_muxer_select="aac_parser"
2275 spx_muxer_select="ogg_muxer"
2276 swf_demuxer_suggest="zlib"
2277 tak_demuxer_select="tak_parser"
2278 tg2_muxer_select="mov_muxer"
2279 tgp_muxer_select="mov_muxer"
2280 w64_demuxer_select="wav_demuxer"
2281 wav_demuxer_select="riffdec"
2282 wav_muxer_select="riffenc"
2283 webm_muxer_select="iso_media riffenc"
2284 webm_muxer_suggest="libopus_encoder libvorbis_encoder libvpx_vp8_encoder libvpx_vp9_encoder"
2285 wtv_demuxer_select="mpegts_demuxer riffdec"
2286 xmv_demuxer_select="riffdec"
2287 xwma_demuxer_select="riffdec"
2288
2289 # indevs / outdevs
2290 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2291 alsa_outdev_deps="alsa_asoundlib_h"
2292 avfoundation_indev_deps="AVFoundation_AVFoundation_h"
2293 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2294 dv1394_indev_deps="dv1394"
2295 dv1394_indev_select="dv_demuxer"
2296 fbdev_indev_deps="linux_fb_h"
2297 jack_indev_deps="jack_jack_h pthreads"
2298 libcdio_indev_deps="libcdio"
2299 libdc1394_indev_deps="libdc1394"
2300 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2301 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2302 pulse_indev_deps="libpulse"
2303 sndio_indev_deps="sndio_h"
2304 sndio_outdev_deps="sndio_h"
2305 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2306 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2307 vfwcap_indev_extralibs="-lavicap32"
2308 x11grab_indev_deps="x11grab"
2309 x11grab_xcb_indev_deps="libxcb"
2310
2311 # protocols
2312 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2313 ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
2314 ffrtmpcrypt_protocol_select="tcp_protocol"
2315 ffrtmphttp_protocol_deps="!librtmp_protocol"
2316 ffrtmphttp_protocol_select="http_protocol"
2317 gopher_protocol_select="network"
2318 http_protocol_select="tcp_protocol"
2319 httpproxy_protocol_select="tcp_protocol"
2320 https_protocol_select="tls_protocol"
2321 icecast_protocol_select="http_protocol"
2322 librtmp_protocol_deps="librtmp"
2323 librtmpe_protocol_deps="librtmp"
2324 librtmps_protocol_deps="librtmp"
2325 librtmpt_protocol_deps="librtmp"
2326 librtmpte_protocol_deps="librtmp"
2327 mmsh_protocol_select="http_protocol"
2328 mmst_protocol_select="network"
2329 rtmp_protocol_deps="!librtmp_protocol"
2330 rtmp_protocol_select="tcp_protocol"
2331 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2332 rtmps_protocol_deps="!librtmp_protocol"
2333 rtmps_protocol_select="tls_protocol"
2334 rtmpt_protocol_select="ffrtmphttp_protocol"
2335 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2336 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2337 rtp_protocol_select="udp_protocol"
2338 sctp_protocol_deps="struct_sctp_event_subscribe"
2339 sctp_protocol_select="network"
2340 srtp_protocol_select="rtp_protocol srtp"
2341 tcp_protocol_select="network"
2342 tls_gnutls_protocol_deps="gnutls"
2343 tls_gnutls_protocol_select="tcp_protocol"
2344 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
2345 tls_openssl_protocol_select="tcp_protocol"
2346 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2347 udp_protocol_select="network"
2348 unix_protocol_deps="sys_un_h"
2349 unix_protocol_select="network"
2350
2351 # filters
2352 blackframe_filter_deps="gpl"
2353 boxblur_filter_deps="gpl"
2354 bs2b_filter_deps="libbs2b"
2355 cropdetect_filter_deps="gpl"
2356 delogo_filter_deps="gpl"
2357 drawtext_filter_deps="libfreetype"
2358 frei0r_filter_deps="frei0r dlopen"
2359 frei0r_filter_extralibs='$ldl'
2360 frei0r_src_filter_deps="frei0r dlopen"
2361 frei0r_src_filter_extralibs='$ldl'
2362 hqdn3d_filter_deps="gpl"
2363 hwupload_cuda_filter_deps="cuda"
2364 interlace_filter_deps="gpl"
2365 ocv_filter_deps="libopencv"
2366 resample_filter_deps="avresample"
2367 scale_filter_deps="swscale"
2368 scale_npp_filter_deps="cuda libnpp"
2369 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2370
2371 # examples
2372 avcodec_example_deps="avcodec avutil"
2373 filter_audio_example_deps="avfilter avutil"
2374 metadata_example_deps="avformat avutil"
2375 output_example_deps="avcodec avformat avutil swscale"
2376 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder vaapi_x11"
2377 transcode_aac_example_deps="avcodec avformat avresample"
2378
2379 # libraries, in linking order
2380 avcodec_deps="avutil"
2381 avdevice_deps="avformat avcodec avutil"
2382 avfilter_deps="avutil"
2383 avformat_deps="avcodec avutil"
2384 avresample_deps="avutil"
2385 swscale_deps="avutil"
2386
2387 # programs
2388 avconv_deps="avcodec avfilter avformat avresample swscale"
2389 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2390                fps_filter null_filter resample_filter scale_filter
2391                setpts_filter trim_filter"
2392 avplay_deps="avcodec avfilter avformat avresample sdl"
2393 avplay_libs='$sdl_libs'
2394 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2395 avprobe_deps="avcodec avformat"
2396
2397 # documentation
2398 pod2man_deps="doc"
2399 texi2html_deps="doc"
2400
2401 # default parameters
2402
2403 logfile="config.log"
2404
2405 # installation paths
2406 prefix_default="/usr/local"
2407 bindir_default='${prefix}/bin'
2408 datadir_default='${prefix}/share/avconv'
2409 docdir_default='${prefix}/share/doc/libav'
2410 incdir_default='${prefix}/include'
2411 libdir_default='${prefix}/lib'
2412 mandir_default='${prefix}/share/man'
2413 shlibdir_default="$libdir_default"
2414
2415 # toolchain
2416 ar_default="ar"
2417 cc_default="gcc"
2418 host_cc_default="gcc"
2419 cp_f="cp -f"
2420 ln_s="ln -s -f"
2421 nm_default="nm -g"
2422 objformat="elf"
2423 pkg_config_default=pkg-config
2424 ranlib="ranlib"
2425 strip="strip"
2426 yasmexe="yasm"
2427
2428 # machine
2429 arch_default=$(uname -m)
2430 cpu="generic"
2431 intrinsics="none"
2432
2433 # OS
2434 target_os_default=$(tolower $(uname -s))
2435 host_os=$target_os_default
2436
2437 # configurable options
2438 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2439
2440 enable asm
2441 enable debug
2442 enable doc
2443 enable faan faandct faanidct
2444 enable optimizations
2445 enable safe_bitstream_reader
2446 enable static
2447 enable swscale_alpha
2448 enable valgrind_backtrace
2449
2450 # By default, enable only those hwaccels that have no external dependencies.
2451 enable d3d11va dxva2 vda vdpau
2452
2453 # build settings
2454 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2455 LIBPREF="lib"
2456 LIBSUF=".a"
2457 FULLNAME='$(NAME)$(BUILDSUF)'
2458 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2459 SLIBPREF="lib"
2460 SLIBSUF=".so"
2461 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2462 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2463 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2464 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2465 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2466 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2467
2468 asflags_filter=echo
2469 cflags_filter=echo
2470 ldflags_filter=echo
2471
2472 AS_C='-c'
2473 AS_O='-o $@'
2474 CC_C='-c'
2475 CC_E='-E -o $@'
2476 CC_O='-o $@'
2477 OBJCC_C='-c'
2478 OBJCC_E='-E -o $@'
2479 OBJCC_O='-o $@'
2480 LD_O='-o $@'
2481 LD_LIB='-l%'
2482 LD_PATH='-L'
2483 HOSTCC_C='-c'
2484 HOSTCC_E='-E -o $@'
2485 HOSTCC_O='-o $@'
2486 HOSTLD_O='-o $@'
2487
2488 host_libs='-lm'
2489 host_cflags_filter=echo
2490 host_ldflags_filter=echo
2491
2492 target_path='$(CURDIR)'
2493
2494 # since the object filename is not given with the -MM flag, the compiler
2495 # is only able to print the basename, and we must add the path ourselves
2496 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2497 DEPFLAGS='-MM'
2498
2499 # find source path
2500 if test -f configure; then
2501     source_path=.
2502 else
2503     source_path=$(cd $(dirname "$0"); pwd)
2504     echo "$source_path" | grep -q '[[:blank:]]' &&
2505         die "Out of tree builds are impossible with whitespace in source path."
2506     test -e "$source_path/config.h" &&
2507         die "Out of tree builds are impossible with config.h in source dir."
2508 fi
2509
2510 for v in "$@"; do
2511     r=${v#*=}
2512     l=${v%"$r"}
2513     r=$(sh_quote "$r")
2514     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2515 done
2516
2517 find_things(){
2518     thing=$1
2519     pattern=$2
2520     file=$source_path/$3
2521     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2522 }
2523
2524 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2525 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2526 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2527 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2528 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2529 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2530 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2531 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2532 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2533
2534 find_things_extern(){
2535     thing=$1
2536     pattern=$2
2537     file=$source_path/$3
2538     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2539 }
2540
2541 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2542 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2543
2544 ALL_COMPONENTS="
2545     $BSF_LIST
2546     $DECODER_LIST
2547     $DEMUXER_LIST
2548     $ENCODER_LIST
2549     $FILTER_LIST
2550     $HWACCEL_LIST
2551     $INDEV_LIST
2552     $MUXER_LIST
2553     $OUTDEV_LIST
2554     $PARSER_LIST
2555     $PROTOCOL_LIST
2556 "
2557
2558 for n in $COMPONENT_LIST; do
2559     v=$(toupper ${n%s})_LIST
2560     eval enable \$$v
2561     eval ${n}_if_any="\$$v"
2562 done
2563
2564 enable $ARCH_EXT_LIST
2565
2566 die_unknown(){
2567     echo "Unknown option \"$1\"."
2568     echo "See $0 --help for available options."
2569     exit 1
2570 }
2571
2572 print_3_columns() {
2573     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2574 }
2575
2576 show_list() {
2577     suffix=_$1
2578     shift
2579     echo $* | sed s/$suffix//g | print_3_columns
2580     exit 0
2581 }
2582
2583 rand_list(){
2584     IFS=', '
2585     set -- $*
2586     unset IFS
2587     for thing; do
2588         comp=${thing%:*}
2589         prob=${thing#$comp}
2590         prob=${prob#:}
2591         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2592         echo "prob ${prob:-0.5}"
2593         printf '%s\n' $comp
2594     done
2595 }
2596
2597 do_random(){
2598     action=$1
2599     shift
2600     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2601     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2602 }
2603
2604 for opt do
2605     optval="${opt#*=}"
2606     case "$opt" in
2607         --extra-ldflags=*)
2608             add_ldflags $optval
2609         ;;
2610         --extra-ldexeflags=*)
2611             add_ldexeflags $optval
2612         ;;
2613         --extra-libs=*)
2614             add_extralibs $optval
2615         ;;
2616         --disable-devices)
2617             disable $INDEV_LIST $OUTDEV_LIST
2618         ;;
2619         --enable-debug=*)
2620             debuglevel="$optval"
2621         ;;
2622         --disable-programs)
2623             disable $PROGRAM_LIST
2624         ;;
2625         --disable-everything)
2626             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2627         ;;
2628         --disable-all)
2629             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2630             disable $LIBRARY_LIST $PROGRAM_LIST doc
2631         ;;
2632         --enable-random|--disable-random)
2633             action=${opt%%-random}
2634             do_random ${action#--} $COMPONENT_LIST
2635         ;;
2636         --enable-random=*|--disable-random=*)
2637             action=${opt%%-random=*}
2638             do_random ${action#--} $optval
2639         ;;
2640         --enable-*=*|--disable-*=*)
2641             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2642             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2643             eval list=\$$(toupper $thing)_LIST
2644             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2645             $action $(filter "$name" $list)
2646         ;;
2647         --enable-avserver|--disable-avserver*)
2648             warn "avserver has been removed, the ${opt} option is only"\
2649                  "provided for compatibility and will be removed in the future"
2650         ;;
2651         --enable-?*|--disable-?*)
2652             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2653             if is_in $option $COMPONENT_LIST; then
2654                 test $action = disable && action=unset
2655                 eval $action \$$(toupper ${option%s})_LIST
2656             elif is_in $option $CMDLINE_SELECT; then
2657                 $action $option
2658             else
2659                 die_unknown $opt
2660             fi
2661         ;;
2662         --list-*)
2663             NAME="${opt#--list-}"
2664             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2665             NAME=${NAME%s}
2666             eval show_list $NAME \$$(toupper $NAME)_LIST
2667         ;;
2668         --help|-h) show_help
2669         ;;
2670         *)
2671             optname="${opt%%=*}"
2672             optname="${optname#--}"
2673             optname=$(echo "$optname" | sed 's/-/_/g')
2674             if is_in $optname $CMDLINE_SET; then
2675                 eval $optname='$optval'
2676             elif is_in $optname $CMDLINE_APPEND; then
2677                 append $optname "$optval"
2678             else
2679                 die_unknown $opt
2680             fi
2681         ;;
2682     esac
2683 done
2684
2685 for e in $env; do
2686     eval "export $e"
2687 done
2688
2689 disabled logging && logfile=/dev/null
2690
2691 # Disable all the library-specific components if the library itself
2692 # is disabled, see AVCODEC_LIST and following _LIST variables.
2693
2694 disable_components(){
2695     disabled ${1} && disable $(
2696         eval components="\$$(toupper ${1})_COMPONENTS"
2697         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2698     )
2699 }
2700
2701 map 'disable_components $v' $LIBRARY_LIST
2702
2703 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2704 set >> $logfile
2705
2706 case "$toolchain" in
2707     *-asan)
2708         cc_default="${toolchain%-asan}"
2709         add_cflags  -fsanitize=address
2710         add_ldflags -fsanitize=address
2711     ;;
2712     *-msan)
2713         cc_default="${toolchain%-msan}"
2714         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2715         add_ldflags -fsanitize=memory
2716     ;;
2717     *-tsan)
2718         cc_default="${toolchain%-tsan}"
2719         add_cflags  -fsanitize=thread -pie
2720         add_ldflags -fsanitize=thread -pie
2721         case "$toolchain" in
2722             gcc-tsan)
2723                 add_cflags  -fPIC
2724                 add_ldflags -fPIC
2725                 ;;
2726         esac
2727     ;;
2728     *-usan)
2729         cc_default="${toolchain%-usan}"
2730         add_cflags  -fsanitize=undefined
2731         add_ldflags -fsanitize=undefined
2732         case "$toolchain" in
2733             clang-usan)
2734                 add_cflags -O1
2735                 ;;
2736         esac
2737     ;;
2738     valgrind-*)
2739         target_exec_default="valgrind"
2740         case "$toolchain" in
2741             valgrind-massif)
2742                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2743                 ;;
2744             valgrind-memcheck)
2745                 target_exec_args="--track-origins=yes --leak-check=full"
2746                 ;;
2747         esac
2748     ;;
2749     msvc)
2750         # Check whether the current MSVC version needs the C99 converter.
2751         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2752         # support enough of C99 to build libav. Default to the new
2753         # behaviour if the regexp was unable to match anything, since this
2754         # successfully parses the version number of existing supported
2755         # versions that require the converter (MSVC 2010 and 2012).
2756         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2757         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2758             cc_default="cl"
2759         else
2760             cc_default="c99wrap cl"
2761         fi
2762         ld_default="$source_path/compat/windows/mslink"
2763         nm_default="dumpbin -symbols"
2764         ar_default="lib"
2765         case "$arch" in
2766         arm*)
2767             as_default="armasm"
2768             ;;
2769         esac
2770         target_os_default="win32"
2771         # Use a relative path for TMPDIR. This makes sure all the
2772         # ffconf temp files are written with a relative path, avoiding
2773         # issues with msys/win32 path conversion for MSVC parameters
2774         # such as -Fo<file> or -out:<file>.
2775         TMPDIR=.
2776     ;;
2777     icl)
2778         cc_default="icl"
2779         ld_default="xilink"
2780         nm_default="dumpbin -symbols"
2781         ar_default="xilib"
2782         target_os_default="win32"
2783         TMPDIR=.
2784     ;;
2785     gcov)
2786         add_cflags  -fprofile-arcs -ftest-coverage
2787         add_ldflags -fprofile-arcs -ftest-coverage
2788     ;;
2789     llvm-cov)
2790         add_cflags -fprofile-arcs -ftest-coverage
2791         add_ldflags --coverage
2792     ;;
2793     hardened)
2794         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2795         add_cflags   -fno-strict-overflow -fstack-protector-all
2796         add_ldflags  -Wl,-z,relro -Wl,-z,now
2797     ;;
2798     ?*)
2799         die "Unknown toolchain $toolchain"
2800     ;;
2801 esac
2802
2803 test -n "$cross_prefix" && enable cross_compile
2804
2805 if enabled cross_compile; then
2806     test -n "$arch" && test -n "$target_os" ||
2807         die "Must specify target arch and OS when cross-compiling"
2808 fi
2809
2810 ar_default="${cross_prefix}${ar_default}"
2811 cc_default="${cross_prefix}${cc_default}"
2812 occ_default="${cross_prefix}${occ_default}"
2813 nm_default="${cross_prefix}${nm_default}"
2814 pkg_config_default="${cross_prefix}${pkg_config_default}"
2815 ranlib="${cross_prefix}${ranlib}"
2816 strip="${cross_prefix}${strip}"
2817
2818 sysinclude_default="${sysroot}/usr/include"
2819
2820 set_default arch cc pkg_config sysinclude target_exec target_os
2821 enabled cross_compile || host_cc_default=$cc
2822 set_default host_cc
2823
2824 if ! $pkg_config --version >/dev/null 2>&1; then
2825     warn "$pkg_config not found, library detection may fail."
2826     pkg_config=false
2827 fi
2828
2829 exesuf() {
2830     case $1 in
2831         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2832     esac
2833 }
2834
2835 EXESUF=$(exesuf $target_os)
2836 HOSTEXESUF=$(exesuf $host_os)
2837
2838 # set temporary file name
2839 : ${TMPDIR:=$TEMPDIR}
2840 : ${TMPDIR:=$TMP}
2841 : ${TMPDIR:=/tmp}
2842
2843 if ! check_cmd mktemp -u XXXXXX; then
2844     # simple replacement for missing mktemp
2845     # NOT SAFE FOR GENERAL USE
2846     mktemp(){
2847         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2848     }
2849 fi
2850
2851 tmpfile(){
2852     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2853         (set -C; exec > $tmp) 2>/dev/null ||
2854         die "Unable to create temporary file in $TMPDIR."
2855     append TMPFILES $tmp
2856     eval $1=$tmp
2857 }
2858
2859 trap 'rm -f -- $TMPFILES' EXIT
2860
2861 tmpfile TMPASM .asm
2862 tmpfile TMPC   .c
2863 tmpfile TMPE   $EXESUF
2864 tmpfile TMPH   .h
2865 tmpfile TMPO   .o
2866 tmpfile TMPS   .S
2867 tmpfile TMPSH  .sh
2868 tmpfile TMPV   .ver
2869
2870 unset -f mktemp
2871
2872 chmod +x $TMPE
2873
2874 # make sure we can execute files in $TMPDIR
2875 cat > $TMPSH 2>> $logfile <<EOF
2876 #! /bin/sh
2877 EOF
2878 chmod +x $TMPSH >> $logfile 2>&1
2879 if ! $TMPSH >> $logfile 2>&1; then
2880     cat <<EOF
2881 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2882 variable to another directory and make sure that it is not mounted noexec.
2883 EOF
2884     die "Sanity test failed."
2885 fi
2886
2887 armasm_flags(){
2888     for flag; do
2889         case $flag in
2890             # Filter out MSVC cl.exe options from cflags that shouldn't
2891             # be passed to gas-preprocessor
2892             -M[TD]*)                                            ;;
2893             *)                  echo $flag                      ;;
2894         esac
2895    done
2896 }
2897
2898 ccc_flags(){
2899     for flag; do
2900         case $flag in
2901             -std=c99)           echo -c99                       ;;
2902             -mcpu=*)            echo -arch ${flag#*=}           ;;
2903             -mieee)             echo -ieee                      ;;
2904             -O*|-fast)          echo $flag                      ;;
2905             -fno-math-errno)    echo -assume nomath_errno       ;;
2906             -g)                 echo -g3                        ;;
2907             -Wall)              echo -msg_enable level2         ;;
2908             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2909             -Wl,*)              echo $flag                      ;;
2910             -f*|-W*)                                            ;;
2911             *)                  echo $flag                      ;;
2912         esac
2913    done
2914 }
2915
2916 cparser_flags(){
2917     for flag; do
2918         case $flag in
2919             -Wno-switch)             echo -Wno-switch-enum ;;
2920             -Wno-format-zero-length) ;;
2921             -Wdisabled-optimization) ;;
2922             -Wno-pointer-sign)       echo -Wno-other ;;
2923             *)                       echo $flag ;;
2924         esac
2925     done
2926 }
2927
2928 msvc_common_flags(){
2929     for flag; do
2930         case $flag in
2931             # In addition to specifying certain flags under the compiler
2932             # specific filters, they must be specified here as well or else the
2933             # generic catch all at the bottom will print the original flag.
2934             -Wall)                ;;
2935             -std=c99)             ;;
2936             # Common flags
2937             -fomit-frame-pointer) ;;
2938             -g)                   echo -Z7 ;;
2939             -fno-math-errno)      ;;
2940             -fno-common)          ;;
2941             -fno-signed-zeros)    ;;
2942             -fPIC)                ;;
2943             -mthumb)              ;;
2944             -march=*)             ;;
2945             -lz)                  echo zlib.lib ;;
2946             -lavifil32)           echo vfw32.lib ;;
2947             -lavicap32)           echo vfw32.lib user32.lib ;;
2948             -lx264)               echo libx264.lib ;;
2949             -l*)                  echo ${flag#-l}.lib ;;
2950             -L*)                  echo -libpath:${flag#-L} ;;
2951             *)                    echo $flag ;;
2952         esac
2953     done
2954 }
2955
2956 msvc_flags(){
2957     msvc_common_flags "$@"
2958     for flag; do
2959         case $flag in
2960             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
2961                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
2962                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
2963                                        -wd4273 -wd4554 -wd4701 ;;
2964         esac
2965     done
2966 }
2967
2968 icl_flags(){
2969     msvc_common_flags "$@"
2970     for flag; do
2971         case $flag in
2972             # Despite what Intel's documentation says -Wall, which is supported
2973             # on Windows, does enable remarks so disable them here.
2974             -Wall)                echo $flag -Qdiag-disable:remark ;;
2975             -std=c99)             echo -Qstd=c99 ;;
2976         esac
2977     done
2978 }
2979
2980 pgi_flags(){
2981     for flag; do
2982         case $flag in
2983             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
2984             -fomit-frame-pointer) echo -Mnoframe ;;
2985             -g)                   echo -gopt ;;
2986             *)                    echo $flag ;;
2987         esac
2988     done
2989 }
2990
2991 suncc_flags(){
2992     for flag; do
2993         case $flag in
2994             -march=*|-mcpu=*)
2995                 case "${flag#*=}" in
2996                     native)                   echo -xtarget=native       ;;
2997                     v9|niagara)               echo -xarch=sparc          ;;
2998                     ultrasparc)               echo -xarch=sparcvis       ;;
2999                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3000                     i586|pentium)             echo -xchip=pentium        ;;
3001                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3002                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3003                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3004                     pentium4*)          echo -xtarget=pentium4           ;;
3005                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3006                     *-sse3)             echo -xarch=sse3                 ;;
3007                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3008                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3009                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3010                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3011                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3012                     k8|opteron|athlon64|athlon-fx)
3013                                                echo -xarch=sse2a         ;;
3014                     athlon*)                   echo -xarch=pentium_proa  ;;
3015                 esac
3016                 ;;
3017             -std=c99)             echo -xc99              ;;
3018             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3019             -fPIC)                echo -KPIC -xcode=pic32 ;;
3020             -W*,*)                echo $flag              ;;
3021             -f*-*|-W*|-mimpure-text)                      ;;
3022             -shared)              echo -G                 ;;
3023             *)                    echo $flag              ;;
3024         esac
3025     done
3026 }
3027
3028 tms470_flags(){
3029     for flag; do
3030         case $flag in
3031             -march=*|-mcpu=*)
3032                 case "${flag#*=}" in
3033                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3034                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3035                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3036                     armv6*|arm11*)          echo -mv=6   ;;
3037                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3038                                             echo -mv=5e  ;;
3039                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3040                 esac
3041                 ;;
3042             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3043             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3044             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3045             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3046             -msoft-float)   echo --float_support=vfplib       ;;
3047             -O[0-3]|-mf=*)  echo $flag                        ;;
3048             -g)             echo -g -mn                       ;;
3049             -pds=*)         echo $flag                        ;;
3050             -D*|-I*)        echo $flag                        ;;
3051             --gcc|--abi=*)  echo $flag                        ;;
3052             -me)            echo $flag                        ;;
3053         esac
3054     done
3055 }
3056
3057 probe_cc(){
3058     pfx=$1
3059     _cc=$2
3060
3061     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3062     unset _ld_o _ldflags _ld_lib _ld_path
3063     unset _depflags _DEPCMD _DEPFLAGS
3064     _flags_filter=echo
3065
3066     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3067         _type=llvm_gcc
3068         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3069         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3070         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3071         _cflags_speed='-O3'
3072         _cflags_size='-Os'
3073     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3074         _type=gcc
3075         gcc_version=$($_cc --version | head -n1)
3076         gcc_basever=$($_cc -dumpversion)
3077         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3078         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3079         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3080         if ! $_cc -dumpversion | grep -q '^2\.'; then
3081             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3082         fi
3083         _cflags_speed='-O3'
3084         _cflags_size='-Os'
3085     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3086         _type=icc
3087         _ident=$($_cc --version | head -n1)
3088         _depflags='-MMD'
3089         _cflags_speed='-O3'
3090         _cflags_size='-Os'
3091         _cflags_noopt='-O1'
3092     elif $_cc -v 2>&1 | grep -q xlc; then
3093         _type=xlc
3094         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3095         _cflags_speed='-O5'
3096         _cflags_size='-O5 -qcompact'
3097     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3098         _type=ccc
3099         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3100         _DEPFLAGS='-M'
3101         _cflags_speed='-fast'
3102         _cflags_size='-O1'
3103         _flags_filter=ccc_flags
3104     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3105         test -d "$sysroot" || die "No valid sysroot specified."
3106         _type=armcc
3107         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3108         armcc_conf="$PWD/armcc.conf"
3109         $_cc --arm_linux_configure                 \
3110              --arm_linux_config_file="$armcc_conf" \
3111              --configure_sysroot="$sysroot"        \
3112              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3113              die "Error creating armcc configuration file."
3114         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3115         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3116         as_default="${cross_prefix}gcc"
3117         _depflags='-MMD'
3118         _cflags_speed='-O3'
3119         _cflags_size='-Os'
3120     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3121         _type=tms470
3122         _ident=$($_cc -version | head -n1 | tr -s ' ')
3123         _flags='--gcc --abi=eabi -me'
3124         _cc_e='-ppl -fe=$@'
3125         _cc_o='-fe=$@'
3126         _depflags='-ppa -ppd=$(@:.o=.d)'
3127         _cflags_speed='-O3 -mf=5'
3128         _cflags_size='-O3 -mf=2'
3129         _flags_filter=tms470_flags
3130     elif $_cc -v 2>&1 | grep -q clang; then
3131         _type=clang
3132         _ident=$($_cc --version 2>/dev/null | head -n1)
3133         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3134         _cflags_speed='-O3'
3135         _cflags_size='-Os'
3136     elif $_cc -V 2>&1 | grep -q Sun; then
3137         _type=suncc
3138         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3139         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3140         _DEPFLAGS='-xM1 -xc99'
3141         _ldflags='-std=c99'
3142         _cflags_speed='-O5'
3143         _cflags_size='-O5 -xspace'
3144         _flags_filter=suncc_flags
3145     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3146         _type=pathscale
3147         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3148         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3149         _cflags_speed='-O2'
3150         _cflags_size='-Os'
3151         _flags_filter='filter_out -Wdisabled-optimization'
3152     elif $_cc -v 2>&1 | grep -q Open64; then
3153         _type=open64
3154         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3155         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3156         _cflags_speed='-O2'
3157         _cflags_size='-Os'
3158         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3159     elif $_cc -V 2>&1 | grep -q Portland; then
3160         _type=pgi
3161         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3162         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3163         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3164         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3165         _cflags_noopt="-O1"
3166         _flags_filter=pgi_flags
3167     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3168         _type=armasm
3169         _ident=$($_cc | head -n1)
3170         # 4509: "This form of conditional instruction is deprecated"
3171         _flags="-nologo -ignore 4509"
3172         _flags_filter=armasm_flags
3173     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3174         _type=msvc
3175         _ident=$($_cc 2>&1 | head -n1)
3176         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3177         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3178         _cflags_speed="-O2"
3179         _cflags_size="-O1"
3180         if $_cc -nologo- 2>&1 | grep -q Linker; then
3181             _ld_o='-out:$@'
3182         else
3183             _ld_o='-Fe$@'
3184         fi
3185         _cc_o='-Fo$@'
3186         _cc_e='-P -Fi$@'
3187         _flags_filter=msvc_flags
3188         _ld_lib='lib%.a'
3189         _ld_path='-libpath:'
3190         _flags='-nologo'
3191         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS'
3192     elif $_cc 2>&1 | grep -q Intel; then
3193         _type=icl
3194         _ident=$($_cc 2>&1 | head -n1)
3195         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3196         # Not only is O3 broken on 13.x+ but it is slower on all previous
3197         # versions (tested) as well.
3198         _cflags_speed="-O2"
3199         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3200         if $_cc 2>&1 | grep -q Linker; then
3201             _ld_o='-out:$@'
3202         else
3203             _ld_o='-Fe$@'
3204         fi
3205         _cc_o='-Fo$@'
3206         _cc_e='-P'
3207         _flags_filter=icl_flags
3208         _ld_lib='lib%.a'
3209         _ld_path='-libpath:'
3210         # -Qdiag-error to make icl error when seeing certain unknown arguments
3211         _flags='-nologo -Qdiag-error:4044,10157'
3212         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3213         # with MSVC which enables it by default.
3214         _cflags='-D_USE_MATH_DEFINES -Qms0 -Qvec- -Qsimd- -GS'
3215     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3216         _type=cparser
3217         _ident=$($_cc --version | head -n1)
3218         _depflags='-MMD'
3219         _cflags_speed='-O4'
3220         _cflags_size='-O2'
3221         _flags_filter=cparser_flags
3222     fi
3223
3224     eval ${pfx}_type=\$_type
3225     eval ${pfx}_ident=\$_ident
3226 }
3227
3228 set_ccvars(){
3229     eval ${1}_C=\${_cc_c-\${${1}_C}}
3230     eval ${1}_E=\${_cc_e-\${${1}_E}}
3231     eval ${1}_O=\${_cc_o-\${${1}_O}}
3232
3233     if [ -n "$_depflags" ]; then
3234         eval ${1}_DEPFLAGS=\$_depflags
3235     else
3236         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3237         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3238         eval DEP${1}FLAGS=\$_flags
3239     fi
3240 }
3241
3242 probe_cc cc "$cc"
3243 cflags_filter=$_flags_filter
3244 cflags_speed=$_cflags_speed
3245 cflags_size=$_cflags_size
3246 cflags_noopt=$_cflags_noopt
3247 add_cflags $_flags $_cflags
3248 cc_ldflags=$_ldflags
3249 set_ccvars CC
3250
3251 probe_cc hostcc "$host_cc"
3252 host_cflags_filter=$_flags_filter
3253 add_host_cflags  $_flags $_cflags
3254 set_ccvars HOSTCC
3255
3256 test -n "$cc_type" && enable $cc_type ||
3257     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3258
3259 : ${as_default:=$cc}
3260 : ${objcc_default:=$cc}
3261 : ${dep_cc_default:=$cc}
3262 : ${ld_default:=$cc}
3263 : ${host_ld_default:=$host_cc}
3264 set_default ar as objcc dep_cc ld host_ld
3265
3266 probe_cc as "$as"
3267 asflags_filter=$_flags_filter
3268 add_asflags $_flags $_cflags
3269 set_ccvars AS
3270
3271 probe_cc objcc "$objcc"
3272 objcflags_filter=$_flags_filter
3273 add_objcflags $_flags $_cflags
3274 set_ccvars OBJC
3275
3276 probe_cc ld "$ld"
3277 ldflags_filter=$_flags_filter
3278 add_ldflags $_flags $_ldflags
3279 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3280 LD_O=${_ld_o-$LD_O}
3281 LD_LIB=${_ld_lib-$LD_LIB}
3282 LD_PATH=${_ld_path-$LD_PATH}
3283
3284 probe_cc hostld "$host_ld"
3285 host_ldflags_filter=$_flags_filter
3286 add_host_ldflags $_flags $_ldflags
3287 HOSTLD_O=${_ld_o-$HOSTLD_O}
3288
3289 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3290     probe_cc depcc "$dep_cc"
3291     CCDEP=${_DEPCMD:-$DEPCMD}
3292     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3293     DEPCCFLAGS=$_flags
3294 fi
3295
3296 if $ar 2>&1 | grep -q Microsoft; then
3297     arflags="-nologo"
3298     ar_o='-out:$@'
3299 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3300     arflags="rq"
3301     ar_o='$@'
3302 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3303     arflags='-Xany -r -c'
3304     ar_o='$@'
3305 else
3306     arflags="rc"
3307     ar_o='$@'
3308 fi
3309
3310 add_cflags $extra_cflags
3311 add_objcflags $extra_objcflags
3312 add_asflags $extra_cflags
3313
3314 if test -n "$sysroot"; then
3315     case "$cc_type" in
3316         gcc|llvm_gcc|clang)
3317             add_cppflags --sysroot="$sysroot"
3318             add_ldflags --sysroot="$sysroot"
3319         ;;
3320         tms470)
3321             add_cppflags -I"$sysinclude"
3322             add_ldflags  --sysroot="$sysroot"
3323         ;;
3324     esac
3325 fi
3326
3327 if test "$cpu" = host; then
3328     enabled cross_compile &&
3329         die "--cpu=host makes no sense when cross-compiling."
3330
3331     case "$cc_type" in
3332         gcc|llvm_gcc)
3333             check_native(){
3334                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3335                 sed -n "/cc1.*$1=/{
3336                             s/.*$1=\\([^ ]*\\).*/\\1/
3337                             p
3338                             q
3339                         }" $TMPE
3340             }
3341             cpu=$(check_native -march || check_native -mcpu)
3342         ;;
3343     esac
3344
3345     test "${cpu:-host}" = host &&
3346         die "--cpu=host not supported with compiler $cc"
3347 fi
3348
3349 # Deal with common $arch aliases
3350 case "$arch" in
3351     aarch64|arm64)
3352         arch="aarch64"
3353     ;;
3354     arm*)
3355         arch="arm"
3356     ;;
3357     mips*|IP*)
3358         case "$arch" in
3359         *el)
3360             add_cppflags -EL
3361             add_ldflags -EL
3362         ;;
3363         *eb)
3364             add_cppflags -EB
3365             add_ldflags -EB
3366         ;;
3367         esac
3368         arch="mips"
3369     ;;
3370     parisc*|hppa*)
3371         arch="parisc"
3372     ;;
3373     "Power Macintosh"|ppc*|powerpc*)
3374         arch="ppc"
3375     ;;
3376     s390|s390x)
3377         arch="s390"
3378     ;;
3379     sh4|sh)
3380         arch="sh4"
3381     ;;
3382     sun4u|sparc*)
3383         arch="sparc"
3384     ;;
3385     tilegx|tile-gx)
3386         arch="tilegx"
3387     ;;
3388     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3389         arch="x86"
3390     ;;
3391 esac
3392
3393 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3394 enable $arch
3395
3396 # Add processor-specific flags
3397 if enabled aarch64; then
3398
3399     case $cpu in
3400         armv*)
3401             cpuflags="-march=$cpu"
3402         ;;
3403         *)
3404             cpuflags="-mcpu=$cpu"
3405         ;;
3406     esac
3407
3408 elif enabled alpha; then
3409
3410     cpuflags="-mcpu=$cpu"
3411
3412 elif enabled arm; then
3413
3414     check_arm_arch() {
3415         check_cpp_condition stddef.h \
3416             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3417             $cpuflags
3418     }
3419
3420     probe_arm_arch() {
3421         if   check_arm_arch 4;        then echo armv4;
3422         elif check_arm_arch 4T;       then echo armv4t;
3423         elif check_arm_arch 5;        then echo armv5;
3424         elif check_arm_arch 5E;       then echo armv5e;
3425         elif check_arm_arch 5T;       then echo armv5t;
3426         elif check_arm_arch 5TE;      then echo armv5te;
3427         elif check_arm_arch 5TEJ;     then echo armv5te;
3428         elif check_arm_arch 6;        then echo armv6;
3429         elif check_arm_arch 6J;       then echo armv6j;
3430         elif check_arm_arch 6K;       then echo armv6k;
3431         elif check_arm_arch 6Z;       then echo armv6z;
3432         elif check_arm_arch 6ZK;      then echo armv6zk;
3433         elif check_arm_arch 6T2;      then echo armv6t2;
3434         elif check_arm_arch 7;        then echo armv7;
3435         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3436         elif check_arm_arch 7S;       then echo armv7-a;
3437         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3438         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3439         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3440         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3441         fi
3442     }
3443
3444     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3445
3446     case $cpu in
3447         armv*)
3448             cpuflags="-march=$cpu"
3449             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3450         ;;
3451         *)
3452             cpuflags="-mcpu=$cpu"
3453             case $cpu in
3454                 cortex-a*)                               subarch=armv7a  ;;
3455                 cortex-r*)                               subarch=armv7r  ;;
3456                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3457                 arm11*)                                  subarch=armv6   ;;
3458                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3459                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3460                 *)                             subarch=$(probe_arm_arch) ;;
3461             esac
3462         ;;
3463     esac
3464
3465     case "$subarch" in
3466         armv5t*)    enable fast_clz                ;;
3467         armv[6-8]*) enable fast_clz fast_unaligned ;;
3468     esac
3469
3470 elif enabled avr32; then
3471
3472     case $cpu in
3473         ap7[02]0[0-2])
3474             subarch="avr32_ap"
3475             cpuflags="-mpart=$cpu"
3476         ;;
3477         ap)
3478             subarch="avr32_ap"
3479             cpuflags="-march=$cpu"
3480         ;;
3481         uc3[ab]*)
3482             subarch="avr32_uc"
3483             cpuflags="-mcpu=$cpu"
3484         ;;
3485         uc)
3486             subarch="avr32_uc"
3487             cpuflags="-march=$cpu"
3488         ;;
3489     esac
3490
3491 elif enabled bfin; then
3492
3493     cpuflags="-mcpu=$cpu"
3494
3495 elif enabled mips; then
3496
3497     cpuflags="-march=$cpu"
3498
3499 elif enabled ppc; then
3500
3501     disable ldbrx
3502
3503     case $(tolower $cpu) in
3504         601|ppc601|powerpc601)
3505             cpuflags="-mcpu=601"
3506             disable altivec
3507         ;;
3508         603*|ppc603*|powerpc603*)
3509             cpuflags="-mcpu=603"
3510             disable altivec
3511         ;;
3512         604*|ppc604*|powerpc604*)
3513             cpuflags="-mcpu=604"
3514             disable altivec
3515         ;;
3516         g3|75*|ppc75*|powerpc75*)
3517             cpuflags="-mcpu=750"
3518             disable altivec
3519         ;;
3520         g4|745*|ppc745*|powerpc745*)
3521             cpuflags="-mcpu=7450"
3522             disable vsx
3523         ;;
3524         74*|ppc74*|powerpc74*)
3525             cpuflags="-mcpu=7400"
3526             disable vsx
3527         ;;
3528         g5|970|ppc970|powerpc970)
3529             cpuflags="-mcpu=970"
3530             disable vsx
3531         ;;
3532         power[3-6]*)
3533             cpuflags="-mcpu=$cpu"
3534             disable vsx
3535         ;;
3536         power[7-8]*)
3537             cpuflags="-mcpu=$cpu"
3538             enable ldbrx
3539         ;;
3540         cell)
3541             cpuflags="-mcpu=cell"
3542             enable ldbrx
3543             disable vsx
3544         ;;
3545         e500mc)
3546             cpuflags="-mcpu=e500mc"
3547             disable altivec
3548         ;;
3549         e500v2)
3550             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3551             disable altivec
3552             disable dcbzl
3553         ;;
3554         e500)
3555             cpuflags="-mcpu=8540 -mhard-float"
3556             disable altivec
3557             disable dcbzl
3558         ;;
3559     esac
3560
3561 elif enabled sparc; then
3562
3563     case $cpu in
3564         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3565             cpuflags="-mcpu=$cpu"
3566         ;;
3567         ultrasparc*|niagara[234])
3568             cpuflags="-mcpu=$cpu"
3569         ;;
3570     esac
3571
3572 elif enabled x86; then
3573
3574     case $cpu in
3575         i[345]86|pentium)
3576             cpuflags="-march=$cpu"
3577             disable i686
3578             disable mmx
3579         ;;
3580         # targets that do NOT support nopl and conditional mov (cmov)
3581         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3582             cpuflags="-march=$cpu"
3583             disable i686
3584         ;;
3585         # targets that do support nopl and conditional mov (cmov)
3586         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3587             cpuflags="-march=$cpu"
3588             enable i686
3589             enable fast_cmov
3590         ;;
3591         # targets that do support conditional mov but on which it's slow
3592         pentium4|pentium4m|prescott|nocona)
3593             cpuflags="-march=$cpu"
3594             enable i686
3595             disable fast_cmov
3596         ;;
3597     esac
3598
3599 fi
3600
3601 if [ "$cpu" != generic ]; then
3602     add_cflags  $cpuflags
3603     add_asflags $cpuflags
3604     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3605 fi
3606
3607 # compiler sanity check
3608 check_exec <<EOF
3609 int main(void){ return 0; }
3610 EOF
3611 if test "$?" != 0; then
3612     echo "$cc is unable to create an executable file."
3613     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3614         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3615         echo "Only do this if you know what cross compiling means."
3616     fi
3617     die "C compiler test failed."
3618 fi
3619
3620 add_cppflags -D_ISOC99_SOURCE
3621 check_cflags -std=c99
3622 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3623 #include <stdlib.h>
3624 EOF
3625 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3626 #include <stdlib.h>
3627 EOF
3628
3629 add_host_cppflags -D_ISOC99_SOURCE
3630 check_host_cflags -std=c99
3631 check_host_cflags -Wall
3632 check_host_cflags -O3
3633
3634 check_64bit(){
3635     arch32=$1
3636     arch64=$2
3637     expr=$3
3638     check_code cc "" "int test[2*($expr) - 1]" &&
3639         subarch=$arch64 || subarch=$arch32
3640 }
3641
3642 case "$arch" in
3643     aarch64|alpha|ia64)
3644         spic=$shared
3645     ;;
3646     mips)
3647         check_64bit mips mips64 '_MIPS_SIM > 1'
3648         spic=$shared
3649     ;;
3650     parisc)
3651         check_64bit parisc parisc64 'sizeof(void *) > 4'
3652         spic=$shared
3653     ;;
3654     ppc)
3655         check_64bit ppc ppc64 'sizeof(void *) > 4'
3656         spic=$shared
3657     ;;
3658     s390)
3659         check_64bit s390 s390x 'sizeof(void *) > 4'
3660         spic=$shared
3661     ;;
3662     sparc)
3663         check_64bit sparc sparc64 'sizeof(void *) > 4'
3664         spic=$shared
3665     ;;
3666     x86)
3667         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3668         if test "$subarch" = "x86_64"; then
3669             spic=$shared
3670         fi
3671     ;;
3672 esac
3673
3674 enable $subarch
3675 enabled spic && enable_weak pic
3676
3677 # OS specific
3678 case $target_os in
3679     aix)
3680         SHFLAGS=-shared
3681         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3682         enabled shared && add_ldflags -Wl,-brtl
3683         ;;
3684     android)
3685         disable symver
3686         enable section_data_rel_ro
3687         SLIB_INSTALL_NAME='$(SLIBNAME)'
3688         SLIB_INSTALL_LINKS=
3689         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3690         ;;
3691     haiku)
3692         prefix_default="/boot/common"
3693         network_extralibs="-lnetwork"
3694         host_libs=
3695         ;;
3696     sunos)
3697         SHFLAGS='-shared -Wl,-h,$$(@F)'
3698         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3699         network_extralibs="-lsocket -lnsl"
3700         # When using suncc to build, the Solaris linker will mark
3701         # an executable with each instruction set encountered by
3702         # the Solaris assembler.  As our libraries contain their own
3703         # guards for processor-specific code, instead suppress
3704         # generation of the HWCAPS ELF section on Solaris x86 only.
3705         enabled_all suncc x86 &&
3706             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3707             add_ldflags -Wl,-M,mapfile
3708         nm_default='nm -P -g'
3709         SLIB_CREATE_DEF_CMD='$(Q)perl $(SRC_PATH)/compat/solaris/make_sunver.pl $$(filter %.ver,$$^) $(OBJS) | grep -v @ > $(SUBDIR)lib$(NAME).ver-sol2'
3710         ;;
3711     netbsd)
3712         disable symver
3713         oss_indev_extralibs="-lossaudio"
3714         oss_outdev_extralibs="-lossaudio"
3715         ;;
3716     openbsd|bitrig)
3717         disable symver
3718         SHFLAGS='-shared'
3719         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3720         SLIB_INSTALL_LINKS=
3721         oss_indev_extralibs="-lossaudio"
3722         oss_outdev_extralibs="-lossaudio"
3723         ;;
3724     dragonfly)
3725         disable symver
3726         ;;
3727     freebsd)
3728         ;;
3729     bsd/os)
3730         add_extralibs -lpoll -lgnugetopt
3731         ;;
3732     darwin)
3733         enabled ppc && add_asflags -force_cpusubtype_ALL
3734         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3735         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3736         add_ldflags -Wl,-dynamic,-search_paths_first
3737         SLIBSUF=".dylib"
3738         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3739         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3740         objformat="macho"
3741         enabled x86_64 && objformat="macho64"
3742         enabled_any pic shared ||
3743             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3744         ;;
3745     msys*)
3746         die "Native MSYS builds are discouraged, please use the MINGW environment.";
3747         ;;
3748     mingw32*|mingw64*)
3749         if test $target_os = "mingw32ce"; then
3750             disable network
3751         else
3752             target_os=mingw32
3753         fi
3754         LIBTARGET=i386
3755         if enabled x86_64; then
3756             LIBTARGET="i386:x86-64"
3757         elif enabled arm; then
3758             LIBTARGET=arm-wince
3759         fi
3760         check_ldflags -Wl,--nxcompat
3761         check_ldflags -Wl,--dynamicbase
3762         shlibdir_default="$bindir_default"
3763         SLIBPREF=""
3764         SLIBSUF=".dll"
3765         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3766         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3767         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3768         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3769         SLIB_INSTALL_LINKS=
3770         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3771         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3772         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3773         objformat="win32"
3774         dlltool="${cross_prefix}dlltool"
3775         ranlib=:
3776         enable dos_paths
3777         ;;
3778     win32|win64)
3779         disable symver
3780         if enabled shared; then
3781             # Link to the import library instead of the normal static library
3782             # for shared libs.
3783             LD_LIB='%.lib'
3784             # Cannot build both shared and static libs with MSVC or icl.
3785             disable static
3786         fi
3787         shlibdir_default="$bindir_default"
3788         SLIBPREF=""
3789         SLIBSUF=".dll"
3790         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3791         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3792         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3793         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3794         SLIB_INSTALL_LINKS=
3795         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3796         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3797         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3798         objformat="win32"
3799         ranlib=:
3800         enable dos_paths
3801         ;;
3802     cygwin*)
3803         target_os=cygwin
3804         shlibdir_default="$bindir_default"
3805         SLIBPREF="cyg"
3806         SLIBSUF=".dll"
3807         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3808         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3809         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3810         SLIB_INSTALL_LINKS=
3811         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3812         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3813         objformat="win32"
3814         enable dos_paths
3815         ;;
3816     *-dos|freedos|opendos)
3817         network_extralibs="-lsocket"
3818         objformat="coff"
3819         enable dos_paths
3820         add_cppflags -U__STRICT_ANSI__
3821         ;;
3822     linux)
3823         enable dv1394
3824         enable section_data_rel_ro
3825         ;;
3826     irix*)
3827         target_os=irix
3828         ranlib="echo ignoring ranlib"
3829         ;;
3830     os/2*)
3831         ln_s="cp -f"
3832         objformat="aout"
3833         add_cppflags -D_GNU_SOURCE
3834         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3835         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3836         LIBSUF="_s.a"
3837         SLIBPREF=""
3838         SLIBSUF=".dll"
3839         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3840         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3841         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3842             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3843             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3844             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3845             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3846         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3847             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3848         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3849         enable dos_paths
3850         ;;
3851     gnu/kfreebsd)
3852         add_cppflags -D_BSD_SOURCE
3853         ;;
3854     gnu)
3855         ;;
3856     qnx)
3857         add_cppflags -D_QNX_SOURCE
3858         network_extralibs="-lsocket"
3859         ;;
3860     symbian)
3861         SLIBSUF=".dll"
3862         enable dos_paths
3863         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3864         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3865         add_ldflags -Wl,--target1-abs,--no-undefined \
3866                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3867                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3868         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3869                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3870                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3871         ;;
3872     osf1)
3873         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3874         ;;
3875     minix)
3876         ;;
3877     plan9)
3878         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3879                      -D_REENTRANT_SOURCE        \
3880                      -D_RESEARCH_SOURCE         \
3881                      -DFD_SETSIZE=96            \
3882                      -DHAVE_SOCK_OPTS
3883         add_compat strtod.o strtod=avpriv_strtod
3884         network_extralibs='-lbsd'
3885         exeobjs=compat/plan9/main.o
3886         cp_f='cp'
3887         ;;
3888     none)
3889         ;;
3890     *)
3891         die "Unknown OS '$target_os'."
3892         ;;
3893 esac
3894
3895 # determine libc flavour
3896
3897 probe_libc(){
3898     pfx=$1
3899     pfx_no_=${pfx%_}
3900     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3901     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3902         eval ${pfx}libc_type=uclibc
3903         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3904     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3905         eval ${pfx}libc_type=glibc
3906         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3907     # MinGW headers can be installed on Cygwin, so check for newlib first.
3908     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3909         eval ${pfx}libc_type=newlib
3910         add_${pfx}cppflags -U__STRICT_ANSI__
3911     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3912     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3913         eval ${pfx}libc_type=mingw64
3914         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3915         eval test \$${pfx_no_}cc_type = "gcc" &&
3916             add_${pfx}cppflags -D__printf__=__gnu_printf__
3917     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3918          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3919         eval ${pfx}libc_type=mingw32
3920         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3921             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3922             die "ERROR: MinGW32 runtime version must be >= 3.15."
3923         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3924         eval test \$${pfx_no_}cc_type = "gcc" &&
3925             add_${pfx}cppflags -D__printf__=__gnu_printf__
3926     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3927         eval ${pfx}libc_type=msvcrt
3928         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
3929             if [ "$pfx" = host_ ]; then
3930                 add_host_cppflags -Dsnprintf=_snprintf
3931             else
3932                 add_compat strtod.o strtod=avpriv_strtod
3933                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3934                                              _snprintf=avpriv_snprintf  \
3935                                              vsnprintf=avpriv_vsnprintf
3936             fi
3937         fi
3938         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3939         # 0x601 by default unless something else is set by the user.
3940         # This can easily lead to us detecting functions only present
3941         # in such new versions and producing binaries requiring windows 7.0.
3942         # Therefore explicitly set the default to XP unless the user has
3943         # set something else on the command line.
3944         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
3945         # family. For these cases, configure is free to use any functions
3946         # found in the SDK headers by default. (Alternatively, we could force
3947         # _WIN32_WINNT to 0x0602 in that case.)
3948         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
3949             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
3950 #ifdef WINAPI_FAMILY
3951 #include <winapifamily.h>
3952 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
3953 #error not desktop
3954 #endif
3955 #endif
3956 EOF
3957     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
3958         eval ${pfx}libc_type=klibc
3959     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
3960         eval ${pfx}libc_type=bionic
3961     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
3962         eval ${pfx}libc_type=solaris
3963         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
3964     else
3965         eval ${pfx}libc_type=default
3966         add_${pfx}cppflags -D_DEFAULT_SOURCE
3967     fi
3968 }
3969
3970 probe_libc
3971 test -n "$libc_type" && enable libc_$libc_type
3972 probe_libc host_
3973 test -n "$host_libc_type" && enable host_libc_$host_libc_type
3974
3975 case $libc_type in
3976     bionic)
3977         add_compat strtod.o strtod=avpriv_strtod
3978         ;;
3979 esac
3980
3981 # hacks for compiler/libc/os combinations
3982
3983 if enabled_all tms470 libc_glibc; then
3984     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
3985     add_cppflags -D__USER_LABEL_PREFIX__=
3986     add_cppflags -D__builtin_memset=memset
3987     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
3988     add_cflags   -pds=48    # incompatible redefinition of macro
3989 fi
3990
3991 if enabled_all ccc libc_glibc; then
3992     add_ldflags -Wl,-z,now  # calls to libots crash without this
3993 fi
3994
3995 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
3996     add_cppflags '-I\$(SRC_PATH)/compat/float'
3997
3998 esc(){
3999     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4000 }
4001
4002 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
4003
4004 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4005
4006 set_default $PATHS_LIST
4007 set_default nm
4008
4009 # we need to build at least one lib type
4010 if ! enabled_any static shared; then
4011     cat <<EOF
4012 At least one library type must be built.
4013 Specify --enable-static to build the static libraries or --enable-shared to
4014 build the shared libraries as well. To only build the shared libraries specify
4015 --disable-static in addition to --enable-shared.
4016 EOF
4017     exit 1;
4018 fi
4019
4020 die_license_disabled() {
4021     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
4022 }
4023
4024 die_license_disabled gpl libcdio
4025 die_license_disabled gpl libx264
4026 die_license_disabled gpl libx265
4027 die_license_disabled gpl libxavs
4028 die_license_disabled gpl libxvid
4029 die_license_disabled gpl x11grab
4030
4031 die_license_disabled nonfree cuda
4032 die_license_disabled nonfree libfaac
4033 die_license_disabled nonfree libfdk_aac
4034 die_license_disabled nonfree libnpp
4035 die_license_disabled nonfree nvenc
4036 die_license_disabled nonfree openssl
4037
4038 die_license_disabled version3 libopencore_amrnb
4039 die_license_disabled version3 libopencore_amrwb
4040 die_license_disabled version3 libvo_aacenc
4041 die_license_disabled version3 libvo_amrwbenc
4042
4043 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
4044
4045 disabled optimizations || check_cflags -fomit-frame-pointer
4046
4047 enable_weak_pic() {
4048     disabled pic && return
4049     enable pic
4050     add_cppflags -DPIC
4051     case "$target_os" in
4052     mingw*|cygwin*)
4053         ;;
4054     *)
4055         add_cflags -fPIC
4056         ;;
4057     esac
4058     add_asflags  -fPIC
4059 }
4060
4061 enabled pic && enable_weak_pic
4062
4063 check_cc <<EOF || die "Symbol mangling check failed."
4064 int ff_extern;
4065 EOF
4066 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4067 extern_prefix=${sym%%ff_extern*}
4068
4069 check_cc <<EOF && enable_weak inline_asm
4070 void foo(void) { __asm__ volatile ("" ::); }
4071 EOF
4072
4073 _restrict=
4074 for restrict_keyword in restrict __restrict__ __restrict; do
4075     check_cc <<EOF && _restrict=$restrict_keyword && break
4076 void foo(char * $restrict_keyword p);
4077 EOF
4078 done
4079
4080 check_cc <<EOF && enable pragma_deprecated
4081 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4082 EOF
4083
4084 check_cc <<EOF && enable attribute_packed
4085 struct { int x; } __attribute__((packed)) x;
4086 EOF
4087
4088 check_cc <<EOF && enable attribute_may_alias
4089 union { int x; } __attribute__((may_alias)) x;
4090 EOF
4091
4092 check_cc <<EOF || die "endian test failed"
4093 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4094 EOF
4095 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4096
4097 check_gas() {
4098     log "check_gas using '$as' as AS"
4099     # :vararg is used on aarch64, arm and ppc altivec
4100     check_as <<EOF || return 1
4101 .macro m n, y:vararg=0
4102 \n: .int \y
4103 .endm
4104 m x
4105 EOF
4106     # .altmacro is only used in arm asm
4107     ! enabled arm || check_as <<EOF || return 1
4108 .altmacro
4109 EOF
4110     enable gnu_as
4111     return 0
4112 }
4113
4114 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4115     nogas=:
4116     enabled_any arm aarch64 && nogas=die
4117     enabled_all ppc altivec && nogas=warn
4118     as_noop=-v
4119
4120     case $as_type in
4121         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4122         gcc)  gaspp_as_type=gas ;;
4123         *)    gaspp_as_type=$as_type ;;
4124     esac
4125
4126     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4127
4128     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4129         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4130
4131     if ! check_gas ; then
4132         as=${gas:=$as}
4133         check_gas || \
4134             $nogas "GNU assembler not found, install/update gas-preprocessor"
4135     fi
4136
4137     check_as <<EOF && enable as_func
4138 .func test
4139 .endfunc
4140 EOF
4141 fi
4142
4143 check_inline_asm inline_asm_labels '"1:\n"'
4144
4145 if enabled aarch64; then
4146     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4147     # internal assembler in clang 3.3 does not support this instruction
4148     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4149     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4150
4151     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4152
4153 elif enabled alpha; then
4154
4155     check_cflags -mieee
4156
4157 elif enabled arm; then
4158
4159     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4160     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4161     enabled thumb && check_cflags -mthumb || check_cflags -marm
4162
4163     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4164         enable vfp_args
4165     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4166         enable vfp_args
4167     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4168         case "${cross_prefix:-$cc}" in
4169             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4170             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4171 __asm__ (".eabi_attribute 28, 1");
4172 int main(void) { return 0; }
4173 EOF
4174         esac
4175         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4176     fi
4177
4178     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4179     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4180     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4181     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4182     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4183     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4184
4185     [ $target_os = linux ] || [ $target_os = android ] ||
4186         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4187             $ARCH_EXT_LIST_ARM
4188
4189     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4190
4191     check_as <<EOF && enable as_dn_directive
4192 ra .dn d0.i16
4193 .unreq ra
4194 EOF
4195
4196     # llvm's integrated assembler supports .object_arch from llvm 3.5
4197     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4198 .object_arch armv4
4199 EOF
4200
4201     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4202
4203 elif enabled mips; then
4204
4205     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4206
4207     # make sure that only an instruction set is enabled
4208     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4209
4210     if enabled mips64; then
4211         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4212             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4213                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4214     else
4215         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4216             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4217                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4218     fi
4219
4220 elif enabled parisc; then
4221
4222     if enabled gcc; then
4223         case $($cc -dumpversion) in
4224             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4225         esac
4226     fi
4227
4228 elif enabled ppc; then
4229
4230     enable local_aligned_8 local_aligned_16
4231
4232     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4233     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4234     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4235     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4236
4237     # AltiVec flags: The FSF version of GCC differs from the Apple version
4238     if enabled altivec; then
4239         check_cflags -maltivec -mabi=altivec &&
4240         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4241         check_cflags -faltivec
4242
4243         # check if our compiler supports Motorola AltiVec C API
4244         check_cc <<EOF || disable altivec
4245 $inc_altivec_h
4246 int main(void) {
4247     vector signed int v1 = (vector signed int) { 0 };
4248     vector signed int v2 = (vector signed int) { 1 };
4249     v1 = vec_add(v1, v2);
4250     return 0;
4251 }
4252 EOF
4253
4254         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4255     fi
4256
4257     if enabled vsx; then
4258         check_cflags -mvsx &&
4259         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4260     fi
4261
4262     if enabled power8; then
4263         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4264     fi
4265
4266 elif enabled x86; then
4267
4268     check_builtin rdtsc    intrin.h   "__rdtsc()"
4269     check_builtin mm_empty mmintrin.h "_mm_empty()"
4270
4271     enable local_aligned_8 local_aligned_16
4272
4273     # check whether EBP is available on x86
4274     # As 'i' is stored on the stack, this program will crash
4275     # if the base pointer is used to access it because the
4276     # base pointer is cleared in the inline assembly code.
4277     check_exec_crash <<EOF && enable ebp_available
4278 volatile int i=0;
4279 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4280 return i;
4281 EOF
4282
4283     # check whether EBX is available on x86
4284     check_inline_asm ebx_available '""::"b"(0)' &&
4285         check_inline_asm ebx_available '"":::"%ebx"'
4286
4287     # check whether xmm clobbers are supported
4288     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4289
4290     # check whether binutils is new enough to compile SSSE3/MMXEXT
4291     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4292     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4293
4294     if ! disabled_any asm mmx yasm; then
4295         if check_cmd $yasmexe --version; then
4296             enabled x86_64 && yasm_extra="-m amd64"
4297             yasm_debug="-g dwarf2"
4298         elif check_cmd nasm -v; then
4299             yasmexe=nasm
4300             yasm_debug="-g -F dwarf"
4301             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4302         fi
4303
4304         YASMFLAGS="-f $objformat $yasm_extra"
4305         enabled pic               && append YASMFLAGS "-DPIC"
4306         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4307         case "$objformat" in
4308             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4309         esac
4310
4311         check_yasm "movbe ecx, [5]" && enable yasm ||
4312             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4313         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4314         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4315         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4316         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4317         check_yasm "CPU amdnop" || disable cpunop
4318     fi
4319
4320     case "$cpu" in
4321         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4322             disable fast_clz
4323         ;;
4324     esac
4325
4326 fi
4327
4328 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4329
4330 check_ldflags -Wl,--as-needed
4331
4332 if check_func dlopen; then
4333     ldl=
4334 elif check_func dlopen -ldl; then
4335     ldl=-ldl
4336 fi
4337
4338 if ! disabled network; then
4339     check_func getaddrinfo $network_extralibs
4340     check_func inet_aton $network_extralibs
4341
4342     check_type netdb.h "struct addrinfo"
4343     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4344     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4345     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4346     check_type poll.h "struct pollfd"
4347     check_type netinet/sctp.h "struct sctp_event_subscribe"
4348     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4349     check_type netinet/in.h "struct sockaddr_in6"
4350     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4351     check_type "sys/types.h sys/socket.h" socklen_t
4352
4353     # Prefer arpa/inet.h over winsock2
4354     if check_header arpa/inet.h ; then
4355         check_func closesocket
4356     elif check_header winsock2.h ; then
4357         check_func_headers winsock2.h closesocket -lws2 &&
4358             network_extralibs="-lws2" ||
4359         { check_func_headers winsock2.h closesocket -lws2_32 &&
4360             network_extralibs="-lws2_32"; } || disable winsock2_h network
4361         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4362
4363         check_type ws2tcpip.h socklen_t
4364         check_type ws2tcpip.h "struct addrinfo"
4365         check_type ws2tcpip.h "struct group_source_req"
4366         check_type ws2tcpip.h "struct ip_mreq_source"
4367         check_type ws2tcpip.h "struct ipv6_mreq"
4368         check_type winsock2.h "struct pollfd"
4369         check_struct winsock2.h "struct sockaddr" sa_len
4370         check_type ws2tcpip.h "struct sockaddr_in6"
4371         check_type ws2tcpip.h "struct sockaddr_storage"
4372     else
4373         disable network
4374     fi
4375 fi
4376
4377 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4378 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4379 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4380 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4381
4382 case "$custom_allocator" in
4383     jemalloc)
4384         # jemalloc by default does not use a prefix
4385         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4386     ;;
4387     tcmalloc)
4388         require_pkg_config libtcmalloc gperftools/tcmalloc.h tc_malloc
4389         malloc_prefix=tc_
4390     ;;
4391 esac
4392
4393 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4394 check_func  ${malloc_prefix}memalign            && enable memalign
4395 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4396
4397 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4398     check_func_headers time.h clock_gettime || { check_func_headers time.h clock_gettime -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
4399
4400 check_func  fcntl
4401 check_func  fork
4402 check_func  gethrtime
4403 check_func  getopt
4404 check_func  getrusage
4405 check_func  gettimeofday
4406 check_func  gmtime_r
4407 check_func  isatty
4408 check_func  localtime_r
4409 check_func  mach_absolute_time
4410 check_func  mkstemp
4411 check_func  mmap
4412 check_func  mprotect
4413 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4414 check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt; }
4415 check_func  sched_getaffinity
4416 check_func  setrlimit
4417 check_func  strerror_r
4418 check_func  sysconf
4419 check_func  sysctl
4420 check_func  usleep
4421
4422 check_func_headers io.h setmode
4423 check_func_headers stdlib.h getenv
4424
4425 check_func_headers windows.h CoTaskMemFree -lole32
4426 check_func_headers windows.h GetProcessAffinityMask
4427 check_func_headers windows.h GetProcessTimes
4428 check_func_headers windows.h GetSystemTimeAsFileTime
4429 check_func_headers windows.h LoadLibrary
4430 check_func_headers windows.h MapViewOfFile
4431 check_func_headers windows.h SetConsoleTextAttribute
4432 check_func_headers windows.h Sleep
4433 check_func_headers windows.h VirtualAlloc
4434 check_struct windows.h "CONDITION_VARIABLE" Ptr
4435
4436 check_header direct.h
4437 check_header dlfcn.h
4438 check_header d3d11.h
4439 check_header dxva.h
4440 check_header dxva2api.h
4441 check_header io.h
4442 check_header mach/mach_time.h
4443 check_header malloc.h
4444 check_header poll.h
4445 check_header sys/mman.h
4446 check_header sys/param.h
4447 check_header sys/resource.h
4448 check_header sys/select.h
4449 check_header sys/time.h
4450 check_header sys/un.h
4451 check_header unistd.h
4452 check_header valgrind/valgrind.h
4453 check_header vdpau/vdpau.h
4454 check_header vdpau/vdpau_x11.h
4455 check_header VideoDecodeAcceleration/VDADecoder.h
4456 check_header windows.h
4457 check_header X11/extensions/XvMClib.h
4458
4459 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
4460 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
4461 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
4462
4463 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4464
4465 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4466 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4467 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4468
4469 check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
4470
4471 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4472
4473 if ! disabled w32threads && ! enabled pthreads; then
4474     check_func_headers "windows.h process.h" _beginthreadex &&
4475         enable w32threads || disable w32threads
4476 fi
4477
4478 # check for some common methods of building with pthread support
4479 # do this before the optional library checks as some of them require pthreads
4480 if ! disabled pthreads && ! enabled w32threads; then
4481     enable pthreads
4482     if check_func pthread_join -pthread; then
4483         add_cflags -pthread
4484         add_extralibs -pthread
4485     elif check_func pthread_join -pthreads; then
4486         add_cflags -pthreads
4487         add_extralibs -pthreads
4488     elif check_func pthread_join -lpthreadGC2; then
4489         add_extralibs -lpthreadGC2
4490     elif check_lib pthread.h pthread_join -lpthread; then
4491         :
4492     elif ! check_func pthread_join; then
4493         disable pthreads
4494     fi
4495 fi
4496
4497 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
4498 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4499
4500 check_lib math.h sin -lm && LIBM="-lm"
4501 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4502
4503 atan2f_args=2
4504 ldexpf_args=2
4505 powf_args=2
4506
4507 for func in $MATH_FUNCS; do
4508     eval check_mathfunc $func \${${func}_args:-1}
4509 done
4510
4511 # these are off by default, so fail if requested and not available
4512 enabled avisynth          && { check_lib2 "avisynth/avisynth_c.h windows.h" LoadLibrary ||
4513                                check_lib2 "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl   ||
4514                                die "ERROR: LoadLibrary/dlopen not found, or avisynth header not found"; }
4515 enabled cuda              && check_lib cuda.h cuInit -lcuda
4516 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4517 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4518 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4519 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4520 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4521 enabled libfdk_aac        && require_pkg_config fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4522 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4523 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4524 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4525                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4526                                done || die "ERROR: libgsm not found"; }
4527 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4528 enabled libkvazaar        && require_pkg_config "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4529 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
4530 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4531 enabled libnpp            && require libnpp npp.h nppGetLibVersion -lnppi -lnppc
4532 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4533 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4534 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4535 enabled libopenh264       && require_pkg_config openh264 wels/codec_api.h WelsGetCodecVersion
4536 enabled libopenjpeg       && { { check_header openjpeg.h && check_lib2 openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC; } ||
4537                                { require_pkg_config libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; } }
4538 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4539 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4540 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4541 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4542 enabled libsnappy         && require snappy snappy-c.h snappy_compress -lsnappy
4543 enabled libspeex          && require_pkg_config speex speex/speex.h speex_decoder_init -lspeex
4544 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4545 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4546 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4547 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4548 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4549 enabled libvpx            && require_pkg_config "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4550     enabled libvpx_vp8_decoder && {
4551         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4552             disable libvpx_vp8_decoder;
4553     }
4554     enabled libvpx_vp8_encoder && {
4555         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4556             disable libvpx_vp8_encoder;
4557     }
4558     enabled libvpx_vp9_decoder && {
4559         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4560             disable libvpx_vp9_decoder;
4561     }
4562     enabled libvpx_vp9_encoder && {
4563         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4564             disable libvpx_vp9_encoder;
4565     }
4566     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4567         die "libvpx enabled but no supported decoders found"
4568     fi
4569 }
4570 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4571 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4572 enabled libx264           && require_pkg_config x264 "stdint.h x264.h" x264_encoder_encode &&
4573                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4574                                die "ERROR: libx264 version must be >= 0.118."; } &&
4575                              { check_cpp_condition x264.h "X264_MPEG2" &&
4576                                enable libx262; }
4577 enabled libx265           && require_pkg_config x265 x265.h x265_api_get &&
4578                              { check_cpp_condition x265.h "X265_BUILD >= 57" ||
4579                                die "ERROR: libx265 version must be >= 57."; }
4580 enabled libxavs           && require libxavs xavs.h xavs_encoder_encode -lxavs
4581 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4582 enabled mmal              && { check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4583                                 { ! enabled cross_compile && {
4584                                     add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline ;
4585                                     add_extralibs -L/opt/vc/lib/ -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ;
4586                                     check_lib interface/mmal/mmal.h mmal_port_connect ; }
4587                                 check_lib interface/mmal/mmal.h mmal_port_connect ; } ||
4588                                die "ERROR: mmal not found"; }
4589 enabled openssl           && { check_pkg_config openssl openssl/ssl.h SSL_library_init && {
4590                                add_cflags $openssl_cflags && add_extralibs $openssl_libs; }||
4591                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4592                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4593                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4594                                die "ERROR: openssl not found"; }
4595
4596 if enabled gnutls; then
4597     { check_lib2 gmp.h mpz_export -lgmp && enable gmp; } ||
4598     { check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }
4599 fi
4600
4601 # libdc1394 check
4602 if enabled libdc1394; then
4603     { require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new &&
4604         enable libdc1394_2; } ||
4605     { check_lib libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394 &&
4606         enable libdc1394_1; } ||
4607     die "ERROR: No version of libdc1394 found "
4608 fi
4609
4610 if enabled nvenc; then
4611     enabled cuda || check_header cuda.h || die "ERROR: cuda.h not found.";
4612     check_header nvEncodeAPI.h || die "ERROR: nvEncodeAPI.h not found.";
4613     check_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 5" ||
4614         die "ERROR: NVENC API version 4 or older is not supported";
4615 fi
4616
4617 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4618     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4619     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4620     enable sdl
4621 fi
4622
4623 pod2man --help     > /dev/null 2>&1 && enable pod2man   || disable pod2man
4624 texi2html -version > /dev/null 2>&1 && enable texi2html || disable texi2html
4625
4626 check_header linux/fb.h
4627 check_header linux/videodev2.h
4628 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4629
4630 check_header AVFoundation/AVFoundation.h &&
4631     check_objcflags -fobjc-arc &&
4632     add_extralibs -framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia ||
4633     disable AVFoundation_AVFoundation_h
4634
4635 check_header sys/videoio.h
4636
4637 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
4638 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4639 # w32api 3.12 had it defined wrong
4640 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4641
4642 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4643 { check_header dev/bktr/ioctl_meteor.h &&
4644   check_header dev/bktr/ioctl_bt848.h; } ||
4645 { check_header machine/ioctl_meteor.h &&
4646   check_header machine/ioctl_bt848.h; } ||
4647 { check_header dev/video/meteor/ioctl_meteor.h &&
4648   check_header dev/video/bktr/ioctl_bt848.h; } ||
4649 check_header dev/ic/bt8xx.h
4650
4651 check_header sndio.h
4652 check_header sys/soundcard.h
4653 check_header soundcard.h
4654
4655 enabled_any alsa_indev alsa_outdev &&
4656     check_lib2 alsa/asoundlib.h snd_pcm_htimestamp -lasound
4657
4658 enabled jack_indev && check_lib2 jack/jack.h jack_client_open -ljack &&
4659     check_func jack_port_get_latency_range -ljack
4660
4661 enabled_any sndio_indev sndio_outdev && check_lib2 sndio.h sio_open -lsndio
4662
4663 if enabled libcdio; then
4664     check_lib2 "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4665     check_lib2 "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4666     die "ERROR: No usable libcdio/cdparanoia found"
4667 fi
4668
4669 check_lib X11/Xlib.h XOpenDisplay -lX11 && enable xlib
4670
4671 if enabled libxcb || enabled x11grab && ! disabled libxcb; then
4672     check_pkg_config xcb-shape xcb/shape.h xcb_shape_rectangles || {
4673         enabled libxcb && die "ERROR: libxcb not found";
4674     } && disable x11grab && enable libxcb
4675
4676     disabled libxcb_shm ||
4677         check_pkg_config xcb-shm xcb/shm.h xcb_shm_attach || {
4678             enabled libxcb_shm && die "ERROR: libxcb_shm not found";
4679         } && check_header sys/shm.h && enable libxcb_shm
4680
4681     disabled libxcb_xfixes ||
4682         check_pkg_config xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image || {
4683             enabled libxcb_xfixes && die "ERROR: libxcb_xfixes not found";
4684         } && enable libxcb_xfixes
4685
4686     add_cflags "$xcb_event_cflags $xcb_shm_cflags $xcb_xfixes_cflags"
4687     add_extralibs "$xcb_event_libs $xcb_shm_libs $xcb_xfixes_libs"
4688 fi
4689
4690 if enabled x11grab; then
4691     enabled xlib || die "ERROR: Xlib not found"
4692     require Xext X11/extensions/XShm.h XShmCreateImage -lXext
4693     require Xfixes X11/extensions/Xfixes.h XFixesGetCursorImage -lXfixes
4694 fi
4695
4696 enabled vaapi &&
4697     check_code cc "va/va.h" "vaCreateSurfaces(0, 0, 0, 0, 0, 0, 0, 0)" ||
4698     disable vaapi
4699
4700 if enabled vaapi ; then
4701     enabled xlib &&
4702     check_lib2 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 &&
4703     enable vaapi_x11
4704
4705     check_lib2 "va/va.h va/va_drm.h" vaGetDisplayDRM -lva -lva-drm &&
4706     enable vaapi_drm
4707 fi
4708
4709 enabled vdpau &&
4710     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4711     disable vdpau
4712
4713 enabled vdpau && enabled xlib &&
4714     check_func_headers "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau &&
4715     prepend avconv_libs $($ldflags_filter "-lvdpau") &&
4716     enable vdpau_x11
4717
4718 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4719
4720 # add some useful compiler flags if supported
4721 check_cflags -Wdeclaration-after-statement
4722 check_cflags -Wall
4723 check_cflags -Wdisabled-optimization
4724 check_cflags -Wpointer-arith
4725 check_cflags -Wredundant-decls
4726 check_cflags -Wwrite-strings
4727 check_cflags -Wtype-limits
4728 check_cflags -Wundef
4729 check_cflags -Wmissing-prototypes
4730 check_cflags -Wstrict-prototypes
4731 enabled extra_warnings && check_cflags -Winline
4732 enabled extra_warnings && check_cflags -Wcast-qual
4733
4734 check_disable_warning(){
4735     warning_flag=-W${1#-Wno-}
4736     test_cflags $warning_flag && add_cflags $1
4737 }
4738
4739 check_disable_warning -Wno-parentheses
4740 check_disable_warning -Wno-switch
4741 check_disable_warning -Wno-format-zero-length
4742 check_disable_warning -Wno-pointer-sign
4743
4744 # add some linker flags
4745 check_ldflags -Wl,--warn-common
4746 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4747 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir
4748 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
4749
4750 # add some strip flags
4751 # -wN '..@*' is more selective than -x, but not available everywhere.
4752 check_stripflags -wN \'..@*\' || check_stripflags -x || strip='true'
4753
4754 enabled neon_clobber_test &&
4755     check_ldflags -Wl,--wrap,avcodec_open2              \
4756                   -Wl,--wrap,avcodec_decode_audio4      \
4757                   -Wl,--wrap,avcodec_decode_video2      \
4758                   -Wl,--wrap,avcodec_decode_subtitle2   \
4759                   -Wl,--wrap,avcodec_encode_audio2      \
4760                   -Wl,--wrap,avcodec_encode_video2      \
4761                   -Wl,--wrap,avcodec_encode_subtitle    \
4762                   -Wl,--wrap,avresample_convert ||
4763     disable neon_clobber_test
4764
4765 enabled xmm_clobber_test &&
4766     check_ldflags -Wl,--wrap,avcodec_open2              \
4767                   -Wl,--wrap,avcodec_decode_audio4      \
4768                   -Wl,--wrap,avcodec_decode_video2      \
4769                   -Wl,--wrap,avcodec_decode_subtitle2   \
4770                   -Wl,--wrap,avcodec_encode_audio2      \
4771                   -Wl,--wrap,avcodec_encode_video2      \
4772                   -Wl,--wrap,avcodec_encode_subtitle    \
4773                   -Wl,--wrap,avresample_convert         \
4774                   -Wl,--wrap,sws_scale ||
4775     disable xmm_clobber_test
4776
4777 echo "X { local: *; };" > $TMPV
4778 if test_ldflags -Wl,--version-script,$TMPV; then
4779     append SHFLAGS '-Wl,--version-script,\$(SUBDIR)lib\$(NAME).ver'
4780 elif test_ldflags -Wl,-M,$TMPV; then
4781     append SHFLAGS '-Wl,-M,\$(SUBDIR)lib\$(NAME).ver-sol2'
4782 fi
4783
4784 check_cc <<EOF && enable symver_asm_label
4785 void ff_foo(void) __asm__ ("av_foo@VERSION");
4786 void ff_foo(void) { ${inline_asm+__asm__($quotes);} }
4787 EOF
4788     check_cc <<EOF && enable symver_gnu_asm
4789 __asm__(".symver ff_foo,av_foo@VERSION");
4790 void ff_foo(void) {}
4791 EOF
4792
4793 if [ -z "$optflags" ]; then
4794     if enabled small; then
4795         optflags=$cflags_size
4796     elif enabled optimizations; then
4797         optflags=$cflags_speed
4798     else
4799         optflags=$cflags_noopt
4800     fi
4801 fi
4802
4803 check_optflags(){
4804     check_cflags "$@"
4805     enabled lto && check_