270a6ec46ed3192d509d52b0ec6e3b10e4e84d27
[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-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
199   --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
200   --enable-libopencv       enable video filtering via libopencv [no]
201   --enable-libopenh264     enable H.264 encoding via OpenH264 [no]
202   --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]
203   --enable-libopus         enable Opus de/encoding via libopus [no]
204   --enable-libpulse        enable Pulseaudio input via libpulse [no]
205   --enable-librtmp         enable RTMP[E] support via librtmp [no]
206   --enable-libschroedinger enable Dirac de/encoding via libschroedinger [no]
207   --enable-libsnappy       enable Snappy compression [no]
208   --enable-libspeex        enable Speex de/encoding via libspeex [no]
209   --enable-libtheora       enable Theora encoding via libtheora [no]
210   --enable-libtwolame      enable MP2 encoding via libtwolame [no]
211   --enable-libvo-aacenc    enable AAC encoding via libvo-aacenc [no]
212   --enable-libvo-amrwbenc  enable AMR-WB encoding via libvo-amrwbenc [no]
213   --enable-libvorbis       enable Vorbis encoding via libvorbis [no]
214   --enable-libvpx          enable VP8 and VP9 de/encoding via libvpx [no]
215   --enable-libwavpack      enable wavpack encoding via libwavpack [no]
216   --enable-libwebp         enable WebP encoding via libwebp [no]
217   --enable-libx264         enable H.264 encoding via x264 [no]
218   --enable-libx265         enable HEVC encoding via x265 [no]
219   --enable-libxavs         enable AVS encoding via xavs [no]
220   --enable-libxcb          enable X11 grabbing using XCB [no]
221   --enable-libxcb-shm      enable X11 grabbing shm communication [auto]
222   --enable-libxcb-xfixes   enable X11 grabbing mouse rendering [auto]
223   --enable-libxvid         enable Xvid encoding via xvidcore,
224                            native MPEG-4/Xvid encoder exists [no]
225   --enable-mmal            enable decoding via MMAL [no]
226   --enable-nvenc           enable encoding via NVENC [no]
227   --enable-openssl         enable openssl [no]
228   --enable-x11grab         enable X11 grabbing (legacy) [no]
229   --enable-zlib            enable zlib [autodetect]
230
231 Toolchain options:
232   --arch=ARCH              select architecture [$arch]
233   --cpu=CPU                select the minimum required CPU (affects
234                            instruction selection, may crash on older CPUs)
235   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
236   --enable-cross-compile   assume a cross-compiler is used
237   --sysroot=PATH           root of cross-build tree
238   --sysinclude=PATH        location of cross-build system headers
239   --target-os=OS           compiler targets OS [$target_os]
240   --target-exec=CMD        command to run executables on target
241   --target-path=DIR        path to view of build directory on target
242   --target-samples=DIR     path to samples directory on target
243   --toolchain=NAME         set tool defaults according to NAME
244   --nm=NM                  use nm tool
245   --ar=AR                  use archive tool AR [$ar_default]
246   --as=AS                  use assembler AS [$as_default]
247   --cc=CC                  use C compiler CC [$cc_default]
248   --objcc=OCC              use ObjC compiler OCC [$cc_default]
249   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
250   --ld=LD                  use linker LD
251   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
252   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
253   --host-cc=HOSTCC         use host C compiler HOSTCC
254   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
255   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
256   --host-ld=HOSTLD         use host linker HOSTLD
257   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
258   --host-libs=HLIBS        use libs HLIBS when linking for host
259   --host-os=OS             compiler host OS [$target_os]
260   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
261   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
262   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
263   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
264   --extra-libs=ELIBS       add ELIBS [$ELIBS]
265   --extra-version=STRING   version string suffix []
266   --optflags=OPTFLAGS      override optimization-related compiler flags
267   --build-suffix=SUFFIX    library name suffix []
268   --enable-pic             build position-independent code
269   --enable-thumb           compile for Thumb instruction set
270   --enable-lto             use link-time optimization
271   --env="ENV=override"     override the environment variables
272
273 Advanced options (experts only):
274   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
275   --custom-allocator=NAME  use a supported custom allocator
276   --disable-symver         disable symbol versioning
277   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
278   --disable-safe-bitstream-reader
279                            disable buffer boundary checking in bitreaders
280                            (faster, but may crash)
281   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
282   --enable-sram            allow use of on-chip SRAM
283
284 Optimization options (experts only):
285   --disable-asm            disable all assembly optimizations
286   --disable-altivec        disable AltiVec optimizations
287   --disable-vsx            disable VSX optimizations
288   --disable-power8         disable POWER8 optimizations
289   --disable-amd3dnow       disable 3DNow! optimizations
290   --disable-amd3dnowext    disable 3DNow! extended optimizations
291   --disable-mmx            disable MMX optimizations
292   --disable-mmxext         disable MMXEXT optimizations
293   --disable-sse            disable SSE optimizations
294   --disable-sse2           disable SSE2 optimizations
295   --disable-sse3           disable SSE3 optimizations
296   --disable-ssse3          disable SSSE3 optimizations
297   --disable-sse4           disable SSE4 optimizations
298   --disable-sse42          disable SSE4.2 optimizations
299   --disable-avx            disable AVX optimizations
300   --disable-xop            disable XOP optimizations
301   --disable-fma3           disable FMA3 optimizations
302   --disable-fma4           disable FMA4 optimizations
303   --disable-avx2           disable AVX2 optimizations
304   --disable-armv5te        disable armv5te optimizations
305   --disable-armv6          disable armv6 optimizations
306   --disable-armv6t2        disable armv6t2 optimizations
307   --disable-vfp            disable VFP optimizations
308   --disable-neon           disable NEON optimizations
309   --disable-inline-asm     disable use of inline assembly
310   --disable-yasm           disable use of nasm/yasm assembly
311
312 Developer options (useful when working on Libav itself):
313   --disable-debug          disable debugging symbols
314   --enable-debug=LEVEL     set the debug level [$debuglevel]
315   --disable-optimizations  disable compiler optimizations
316   --enable-extra-warnings  enable more compiler warnings
317   --samples=PATH           location of test samples for FATE, if not set use
318                            \$LIBAV_SAMPLES at make invocation time.
319   --enable-neon-clobber-test check NEON registers for clobbering (should be
320                            used only for debugging purposes)
321   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
322                            should be used only for debugging purposes)
323   --enable-random          randomly enable/disable components
324   --disable-random
325   --enable-random=LIST     randomly enable/disable specific components or
326   --disable-random=LIST    component groups. LIST is a comma-separated list
327                            of NAME[:PROB] entries where NAME is a component
328                            (group) and PROB the probability associated with
329                            NAME (default 0.5).
330   --random-seed=VALUE      seed value for --enable/disable-random
331   --disable-valgrind-backtrace do not print a backtrace under Valgrind
332                            (only applies to --disable-optimizations builds)
333
334 NOTE: Object files are built at the place where configure is launched.
335 EOF
336   exit 0
337 }
338
339 quotes='""'
340
341 log(){
342     echo "$@" >> $logfile
343 }
344
345 log_file(){
346     log BEGIN $1
347     i=1
348     while read line; do
349         printf '%5s   %s\n' "${i}" "${line}"
350         i=$(($i+1))
351     done < $1 >> $logfile
352     log END $1
353 }
354
355 echolog(){
356     log "$@"
357     echo "$@"
358 }
359
360 warn(){
361     log "WARNING: $*"
362     WARNINGS="${WARNINGS}WARNING: $*\n"
363 }
364
365 die(){
366     echolog "$@"
367     cat <<EOF
368
369 If you think configure made a mistake, make sure you are using the latest
370 version from Git.  If the latest version fails, report the problem to the
371 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
372 EOF
373     if disabled logging; then
374         cat <<EOF
375 Rerun configure with logging enabled (do not use --disable-logging), and
376 include the log this produces with your report.
377 EOF
378     else
379         cat <<EOF
380 Include the log file "$logfile" produced by configure as this will help
381 solving the problem.
382 EOF
383     fi
384     exit 1
385 }
386
387 # Avoid locale weirdness, besides we really just want to translate ASCII.
388 toupper(){
389     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
390 }
391
392 tolower(){
393     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
394 }
395
396 c_escape(){
397     echo "$*" | sed 's/["\\]/\\\0/g'
398 }
399
400 sh_quote(){
401     v=$(echo "$1" | sed "s/'/'\\\\''/g")
402     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
403     echo "$v"
404 }
405
406 cleanws(){
407     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
408 }
409
410 filter(){
411     pat=$1
412     shift
413     for v; do
414         eval "case $v in $pat) echo $v ;; esac"
415     done
416 }
417
418 filter_out(){
419     pat=$1
420     shift
421     for v; do
422         eval "case $v in $pat) ;; *) echo $v ;; esac"
423     done
424 }
425
426 map(){
427     m=$1
428     shift
429     for v; do eval $m; done
430 }
431
432 add_suffix(){
433     suffix=$1
434     shift
435     for v; do echo ${v}${suffix}; done
436 }
437
438 set_all(){
439     value=$1
440     shift
441     for var in $*; do
442         eval $var=$value
443     done
444 }
445
446 set_weak(){
447     value=$1
448     shift
449     for var; do
450         eval : \${$var:=$value}
451     done
452 }
453
454 sanitize_var_name(){
455     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
456 }
457
458 set_safe(){
459     var=$1
460     shift
461     eval $(sanitize_var_name "$var")='$*'
462 }
463
464 get_safe(){
465     eval echo \$$(sanitize_var_name "$1")
466 }
467
468 pushvar(){
469     for pvar in $*; do
470         eval level=\${${pvar}_level:=0}
471         eval ${pvar}_${level}="\$$pvar"
472         eval ${pvar}_level=$(($level+1))
473     done
474 }
475
476 popvar(){
477     for pvar in $*; do
478         eval level=\${${pvar}_level:-0}
479         test $level = 0 && continue
480         eval level=$(($level-1))
481         eval $pvar="\${${pvar}_${level}}"
482         eval ${pvar}_level=$level
483         eval unset ${pvar}_${level}
484     done
485 }
486
487 enable(){
488     set_all yes $*
489 }
490
491 check_requested() {
492     for var; do
493         eval test "x\$${var#!}_requested" = "xyes" &&  die "${var%%_*} cannot be enabled"
494     done
495 }
496
497 disable(){
498     set_all no $*
499     check_requested $*
500 }
501
502 enable_weak(){
503     set_weak yes $*
504 }
505
506 disable_weak(){
507     set_weak no $*
508 }
509
510 enable_safe(){
511     for var; do
512         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
513     done
514 }
515
516 disable_safe(){
517     for var; do
518         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
519     done
520 }
521
522 do_enable_deep(){
523     for var; do
524         enabled $var && continue
525         eval sel="\$${var}_select"
526         eval sgs="\$${var}_suggest"
527         pushvar var sgs
528         enable_deep $sel
529         popvar sgs
530         enable_deep_weak $sgs
531         popvar var
532     done
533 }
534
535 enable_deep(){
536     do_enable_deep $*
537     enable $*
538 }
539
540 enable_deep_weak(){
541     for var; do
542         disabled $var && continue
543         pushvar var
544         do_enable_deep $var
545         popvar var
546         enable_weak $var
547     done
548 }
549
550 do_enable_deep_force(){
551     for var; do
552         enabled $var && continue
553         eval sel="\$${var}_deps\ \$${var}_deps_any\ \$${var}_select\ \$${var}_suggest\ \$${var}_select_any"
554         pushvar var
555         enable_deep_force $sel
556         popvar var
557     done
558 }
559
560 enable_deep_force(){
561     do_enable_deep_force $*
562     for var; do
563         is_in $var $ALL_COMPONENTS $COMPONENT_LIST $LIBRARY_LIST && enable $var
564     done
565 }
566
567 request(){
568     disable $* # force the refresh of the dependencies
569     for var; do
570         enable ${var}_requested
571     done
572     enable_deep_force $*
573     enable $*
574 }
575
576 enabled(){
577     test "${1#!}" = "$1" && op== || op=!=
578     eval test "x\$${1#!}" $op "xyes"
579 }
580
581 disabled(){
582     test "${1#!}" = "$1" && op== || op=!=
583     eval test "x\$${1#!}" $op "xno"
584 }
585
586 enabled_all(){
587     for opt; do
588         enabled $opt || return 1
589     done
590 }
591
592 disabled_all(){
593     for opt; do
594         disabled $opt || return 1
595     done
596 }
597
598 enabled_any(){
599     for opt; do
600         enabled $opt && return 0
601     done
602 }
603
604 disabled_any(){
605     for opt; do
606         disabled $opt && return 0
607     done
608     return 1
609 }
610
611 set_default(){
612     for opt; do
613         eval : \${$opt:=\$${opt}_default}
614     done
615 }
616
617 is_in(){
618     value=$1
619     shift
620     for var in $*; do
621         [ $var = $value ] && return 0
622     done
623     return 1
624 }
625
626 do_check_deps(){
627     for cfg; do
628         cfg="${cfg#!}"
629         enabled ${cfg}_checking && die "Circular dependency for $cfg."
630         disabled ${cfg}_checking && continue
631         enable ${cfg}_checking
632         append allopts $cfg
633
634         eval dep_all="\$${cfg}_deps"
635         eval dep_any="\$${cfg}_deps_any\ \$${cfg}_select_any"
636         eval dep_sel="\$${cfg}_select"
637         eval dep_sgs="\$${cfg}_suggest"
638         eval dep_ifa="\$${cfg}_if"
639         eval dep_ifn="\$${cfg}_if_any"
640
641         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
642         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
643         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
644
645         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
646         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
647         enabled_all  $dep_all || disable $cfg
648         enabled_any  $dep_any || disable $cfg
649         disabled_any $dep_sel && disable $cfg
650
651         if enabled $cfg; then
652             enable_deep $dep_sel
653             enable_deep_weak $dep_sgs
654         fi
655
656         disable ${cfg}_checking
657     done
658 }
659
660 check_deps(){
661     unset allopts
662
663     do_check_deps "$@"
664
665     for cfg in $allopts; do
666         enabled $cfg || continue
667         eval dep_extralibs="\$${cfg}_extralibs"
668         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
669     done
670 }
671
672 print_config(){
673     pfx=$1
674     files=$2
675     shift 2
676     map 'eval echo "$v \${$v:-no}"' "$@" |
677     awk "BEGIN { split(\"$files\", files) }
678         {
679             c = \"$pfx\" toupper(\$1);
680             v = \$2;
681             sub(/yes/, 1, v);
682             sub(/no/,  0, v);
683             for (f in files) {
684                 file = files[f];
685                 if (file ~ /\\.h\$/) {
686                     printf(\"#define %s %d\\n\", c, v) >>file;
687                 } else if (file ~ /\\.asm\$/) {
688                     printf(\"%%define %s %d\\n\", c, v) >>file;
689                 } else if (file ~ /\\.mak\$/) {
690                     n = -v ? \"\" : \"!\";
691                     printf(\"%s%s=yes\\n\", n, c) >>file;
692                 }
693             }
694         }"
695 }
696
697 print_enabled(){
698     suf=$1
699     shift
700     for v; do
701         enabled $v && printf "%s\n" ${v%$suf};
702     done
703 }
704
705 append(){
706     var=$1
707     shift
708     eval "$var=\"\$$var $*\""
709 }
710
711 prepend(){
712     var=$1
713     shift
714     eval "$var=\"$* \$$var\""
715 }
716
717 unique(){
718     var=$1
719     uniq_list=""
720     for tok in $(eval echo \$$var); do
721         uniq_list="$(filter_out $tok $uniq_list) $tok"
722     done
723     eval "$var=\"${uniq_list}\""
724 }
725
726 add_cppflags(){
727     append CPPFLAGS "$@"
728 }
729
730 add_cflags(){
731     append CFLAGS $($cflags_filter "$@")
732 }
733
734 add_asflags(){
735     append ASFLAGS $($asflags_filter "$@")
736 }
737
738 add_objcflags(){
739     append OBJCFLAGS $($objcflags_filter "$@")
740 }
741
742 add_ldflags(){
743     append LDFLAGS $($ldflags_filter "$@")
744 }
745
746 add_ldexeflags(){
747     append LDEXEFLAGS $($ldflags_filter "$@")
748 }
749
750 add_stripflags(){
751     append STRIPFLAGS "$@"
752 }
753
754 add_extralibs(){
755     prepend extralibs $($ldflags_filter "$@")
756 }
757
758 add_host_cppflags(){
759     append host_cppflags "$@"
760 }
761
762 add_host_cflags(){
763     append host_cflags $($host_cflags_filter "$@")
764 }
765
766 add_host_ldflags(){
767     append host_ldflags $($host_ldflags_filter "$@")
768 }
769
770 add_compat(){
771     append compat_objs $1
772     shift
773     map 'add_cppflags -D$v' "$@"
774 }
775
776 check_cmd(){
777     log "$@"
778     "$@" >> $logfile 2>&1
779 }
780
781 cc_o(){
782     eval printf '%s\\n' $CC_O
783 }
784
785 cc_e(){
786     eval printf '%s\\n' $CC_E
787 }
788
789 check_cc(){
790     log check_cc "$@"
791     cat > $TMPC
792     log_file $TMPC
793     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
794 }
795
796 check_objcc(){
797     log check_objcc "$@"
798     cat > $TMPC
799     log_file $TMPC
800     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
801 }
802
803 check_cpp(){
804     log check_cpp "$@"
805     cat > $TMPC
806     log_file $TMPC
807     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
808 }
809
810 as_o(){
811     eval printf '%s\\n' $AS_O
812 }
813
814 check_as(){
815     log check_as "$@"
816     cat > $TMPS
817     log_file $TMPS
818     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
819 }
820
821 check_inline_asm(){
822     log check_inline_asm "$@"
823     name="$1"
824     code="$2"
825     shift 2
826     disable $name
827     check_cc "$@" <<EOF && enable $name
828 void foo(void){ __asm__ volatile($code); }
829 EOF
830 }
831
832 check_insn(){
833     log check_insn "$@"
834     check_inline_asm ${1}_inline "\"$2\""
835     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
836 }
837
838 check_yasm(){
839     log check_yasm "$@"
840     echo "$1" > $TMPS
841     log_file $TMPS
842     shift 1
843     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
844 }
845
846 ld_o(){
847     eval printf '%s\\n' $LD_O
848 }
849
850 check_ld(){
851     log check_ld "$@"
852     flags=$(filter_out '-l*' "$@")
853     libs=$(filter '-l*' "$@")
854     check_cc $($cflags_filter $flags) || return
855     flags=$($ldflags_filter $flags)
856     libs=$($ldflags_filter $libs)
857     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
858 }
859
860 print_include(){
861     hdr=$1
862     test "${hdr%.h}" = "${hdr}" &&
863         echo "#include $hdr"    ||
864         echo "#include <$hdr>"
865 }
866
867 check_code(){
868     log check_code "$@"
869     check=$1
870     headers=$2
871     code=$3
872     shift 3
873     {
874         for hdr in $headers; do
875             print_include $hdr
876         done
877         echo "int main(void) { $code; return 0; }"
878     } | check_$check "$@"
879 }
880
881 check_cppflags(){
882     log check_cppflags "$@"
883     check_cc "$@" <<EOF && append CPPFLAGS "$@"
884 int x;
885 EOF
886 }
887
888 test_cflags(){
889     log test_cflags "$@"
890     set -- $($cflags_filter "$@")
891     check_cc "$@" <<EOF
892 int x;
893 EOF
894 }
895
896 check_cflags(){
897     log check_cflags "$@"
898     test_cflags "$@" && add_cflags "$@"
899 }
900
901 test_objcflags(){
902     log test_cflags "$@"
903     set -- $($cflags_filter "$@")
904     check_objcc "$@" <<EOF
905 int x;
906 EOF
907 }
908
909 check_objcflags(){
910     log check_cflags "$@"
911     test_objcflags "$@" && add_objcflags "$@"
912 }
913
914 test_ldflags(){
915     log test_ldflags "$@"
916     check_ld "$@" <<EOF
917 int main(void){ return 0; }
918 EOF
919 }
920
921 check_ldflags(){
922     log check_ldflags "$@"
923     test_ldflags "$@" && add_ldflags "$@"
924 }
925
926 test_stripflags(){
927     log test_stripflags "$@"
928     # call check_cc to get a fresh TMPO
929     check_cc <<EOF
930 int main(void) { return 0; }
931 EOF
932     check_cmd $strip $STRIPFLAGS "$@" $TMPO
933 }
934
935 check_stripflags(){
936     log check_stripflags "$@"
937     test_stripflags "$@" && add_stripflags "$@"
938 }
939
940 check_header(){
941     log check_header "$@"
942     header=$1
943     shift
944     disable_safe $header
945     check_cpp "$@" <<EOF && enable_safe $header
946 #include <$header>
947 int x;
948 EOF
949 }
950
951 check_func(){
952     log check_func "$@"
953     func=$1
954     shift
955     disable $func
956     check_ld "$@" <<EOF && enable $func
957 extern int $func();
958 int main(void){ $func(); }
959 EOF
960 }
961
962 check_mathfunc(){
963     log check_mathfunc "$@"
964     func=$1
965     narg=$2
966     shift 2
967     test $narg = 2 && args="f, g" || args="f"
968     disable $func
969     check_ld "$@" <<EOF && enable $func
970 #include <math.h>
971 float foo(float f, float g) { return $func($args); }
972 int main(void){ return 0; }
973 EOF
974 }
975
976 check_func_headers(){
977     log check_func_headers "$@"
978     headers=$1
979     funcs=$2
980     shift 2
981     {
982         for hdr in $headers; do
983             print_include $hdr
984         done
985         for func in $funcs; do
986             echo "long check_$func(void) { return (long) $func; }"
987         done
988         echo "int main(void) { return 0; }"
989     } | check_ld "$@" && enable $funcs && enable_safe $headers
990 }
991
992 check_cpp_condition(){
993     log check_cpp_condition "$@"
994     header=$1
995     condition=$2
996     shift 2
997     check_cpp "$@" <<EOF
998 #include <$header>
999 #if !($condition)
1000 #error "unsatisfied condition: $condition"
1001 #endif
1002 EOF
1003 }
1004
1005 check_lib(){
1006     log check_lib "$@"
1007     header="$1"
1008     func="$2"
1009     shift 2
1010     check_header $header && check_func $func "$@" && add_extralibs "$@"
1011 }
1012
1013 check_lib2(){
1014     log check_lib2 "$@"
1015     headers="$1"
1016     funcs="$2"
1017     shift 2
1018     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
1019 }
1020
1021 check_pkg_config(){
1022     log check_pkg_config "$@"
1023     pkg="$1"
1024     headers="$2"
1025     funcs="$3"
1026     shift 3
1027     check_cmd $pkg_config --exists --print-errors $pkg || return
1028     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1029     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1030     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1031         set_safe "${pkg}_cflags" $pkg_cflags   &&
1032         set_safe "${pkg}_libs"   $pkg_libs
1033 }
1034
1035 check_exec(){
1036     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1037 }
1038
1039 check_exec_crash(){
1040     code=$(cat)
1041
1042     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1043     # are safe but may not be available everywhere.  Thus we use
1044     # raise(SIGTERM) instead.  The check is run in a subshell so we
1045     # can redirect the "Terminated" message from the shell.  SIGBUS
1046     # is not defined by standard C so it is used conditionally.
1047
1048     (check_exec "$@") >> $logfile 2>&1 <<EOF
1049 #include <signal.h>
1050 static void sighandler(int sig){
1051     raise(SIGTERM);
1052 }
1053 int foo(void){
1054     $code
1055 }
1056 int (*func_ptr)(void) = foo;
1057 int main(void){
1058     signal(SIGILL, sighandler);
1059     signal(SIGFPE, sighandler);
1060     signal(SIGSEGV, sighandler);
1061 #ifdef SIGBUS
1062     signal(SIGBUS, sighandler);
1063 #endif
1064     return func_ptr();
1065 }
1066 EOF
1067 }
1068
1069 check_type(){
1070     log check_type "$@"
1071     headers=$1
1072     type=$2
1073     shift 2
1074     disable_safe "$type"
1075     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1076 }
1077
1078 check_struct(){
1079     log check_struct "$@"
1080     headers=$1
1081     struct=$2
1082     member=$3
1083     shift 3
1084     disable_safe "${struct}_${member}"
1085     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1086         enable_safe "${struct}_${member}"
1087 }
1088
1089 check_builtin(){
1090     log check_builtin "$@"
1091     name=$1
1092     headers=$2
1093     builtin=$3
1094     shift 3
1095     disable "$name"
1096     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1097 }
1098
1099 check_compile_assert(){
1100     log check_compile_assert "$@"
1101     name=$1
1102     headers=$2
1103     condition=$3
1104     shift 3
1105     disable "$name"
1106     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1107 }
1108
1109 require(){
1110     name="$1"
1111     header="$2"
1112     func="$3"
1113     shift 3
1114     check_lib $header $func "$@" || die "ERROR: $name not found"
1115 }
1116
1117 require2(){
1118     name="$1"
1119     headers="$2"
1120     func="$3"
1121     shift 3
1122     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1123 }
1124
1125 require_pkg_config(){
1126     pkg="$1"
1127     check_pkg_config "$@" || die "ERROR: $pkg not found"
1128     add_cflags    $(get_safe "${pkg}_cflags")
1129     add_extralibs $(get_safe "${pkg}_libs")
1130 }
1131
1132 hostcc_e(){
1133     eval printf '%s\\n' $HOSTCC_E
1134 }
1135
1136 hostcc_o(){
1137     eval printf '%s\\n' $HOSTCC_O
1138 }
1139
1140 check_host_cc(){
1141     log check_host_cc "$@"
1142     cat > $TMPC
1143     log_file $TMPC
1144     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1145 }
1146
1147 check_host_cpp(){
1148     log check_host_cpp "$@"
1149     cat > $TMPC
1150     log_file $TMPC
1151     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1152 }
1153
1154 check_host_cppflags(){
1155     log check_host_cppflags "$@"
1156     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1157 int x;
1158 EOF
1159 }
1160
1161 check_host_cflags(){
1162     log check_host_cflags "$@"
1163     set -- $($host_cflags_filter "$@")
1164     check_host_cc "$@" <<EOF && append host_cflags "$@"
1165 int x;
1166 EOF
1167 }
1168
1169 check_host_cpp_condition(){
1170     log check_host_cpp_condition "$@"
1171     header=$1
1172     condition=$2
1173     shift 2
1174     check_host_cpp "$@" <<EOF
1175 #include <$header>
1176 #if !($condition)
1177 #error "unsatisfied condition: $condition"
1178 #endif
1179 EOF
1180 }
1181
1182 apply(){
1183     file=$1
1184     shift
1185     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1186 }
1187
1188 cp_if_changed(){
1189     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1190     mkdir -p "$(dirname $2)"
1191     $cp_f "$1" "$2"
1192 }
1193
1194 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1195 # system-dependent things.
1196
1197 AVCODEC_COMPONENTS="
1198     bsfs
1199     decoders
1200     encoders
1201     hwaccels
1202     parsers
1203 "
1204
1205 AVDEVICE_COMPONENTS="
1206     indevs
1207     outdevs
1208 "
1209 AVFILTER_COMPONENTS="
1210     filters
1211 "
1212 AVFORMAT_COMPONENTS="
1213     demuxers
1214     muxers
1215     protocols
1216 "
1217
1218 AVRESAMPLE_COMPONENTS=""
1219 AVUTIL_COMPONENTS=""
1220
1221 COMPONENT_LIST="
1222     $AVCODEC_COMPONENTS
1223     $AVDEVICE_COMPONENTS
1224     $AVFILTER_COMPONENTS
1225     $AVFORMAT_COMPONENTS
1226     $AVRESAMPLE_COMPONENTS
1227     $AVUTIL_COMPONENTS
1228 "
1229
1230 EXAMPLE_LIST="
1231     avcodec_example
1232     filter_audio_example
1233     metadata_example
1234     output_example
1235     qsvdec_example
1236     transcode_aac_example
1237 "
1238
1239 EXTERNAL_LIBRARY_LIST="
1240     avisynth
1241     bzlib
1242     cuda
1243     frei0r
1244     gnutls
1245     libbs2b
1246     libcdio
1247     libdc1394
1248     libdcadec
1249     libfaac
1250     libfdk_aac
1251     libfontconfig
1252     libfreetype
1253     libgsm
1254     libilbc
1255     libkvazaar
1256     libmfx
1257     libmp3lame
1258     libopencore_amrnb
1259     libopencore_amrwb
1260     libopencv
1261     libopenh264
1262     libopenjpeg
1263     libopus
1264     libpulse
1265     librtmp
1266     libschroedinger
1267     libsnappy
1268     libspeex
1269     libtheora
1270     libtwolame
1271     libvo_aacenc
1272     libvo_amrwbenc
1273     libvorbis
1274     libvpx
1275     libwavpack
1276     libwebp
1277     libx264
1278     libx265
1279     libxavs
1280     libxcb
1281     libxcb_shm
1282     libxcb_xfixes
1283     libxvid
1284     mmal
1285     nvenc
1286     openssl
1287     x11grab
1288     zlib
1289 "
1290
1291 FEATURE_LIST="
1292     gray
1293     hardcoded_tables
1294     runtime_cpudetect
1295     safe_bitstream_reader
1296     shared
1297     small
1298     sram
1299     static
1300     swscale_alpha
1301 "
1302
1303 HWACCEL_LIST="
1304     d3d11va
1305     dxva2
1306     vaapi
1307     vda
1308     vdpau
1309 "
1310
1311 LIBRARY_LIST="
1312     avcodec
1313     avdevice
1314     avfilter
1315     avformat
1316     avresample
1317     avutil
1318     swscale
1319 "
1320
1321 LICENSE_LIST="
1322     gpl
1323     nonfree
1324     version3
1325 "
1326
1327 PROGRAM_LIST="
1328     avconv
1329     avplay
1330     avprobe
1331 "
1332
1333 SUBSYSTEM_LIST="
1334     dct
1335     doc
1336     error_resilience
1337     faan
1338     fft
1339     lsp
1340     lzo
1341     mdct
1342     network
1343     rdft
1344 "
1345
1346 CONFIG_LIST="
1347     $COMPONENT_LIST
1348     $EXAMPLE_LIST
1349     $EXTERNAL_LIBRARY_LIST
1350     $FEATURE_LIST
1351     $HWACCEL_LIST
1352     $LICENSE_LIST
1353     $LIBRARY_LIST
1354     $PROGRAM_LIST
1355     $SUBSYSTEM_LIST
1356     memalign_hack
1357     neon_clobber_test
1358     pic
1359     pod2man
1360     texi2html
1361     thumb
1362     valgrind_backtrace
1363     xmm_clobber_test
1364 "
1365
1366 THREADS_LIST="
1367     pthreads
1368     w32threads
1369 "
1370
1371 ATOMICS_LIST="
1372     atomics_gcc
1373     atomics_suncc
1374     atomics_win32
1375 "
1376
1377 ARCH_LIST="
1378     aarch64
1379     alpha
1380     arm
1381     avr32
1382     avr32_ap
1383     avr32_uc
1384     bfin
1385     ia64
1386     m68k
1387     mips
1388     mips64
1389     parisc
1390     ppc
1391     ppc64
1392     s390
1393     sh4
1394     sparc
1395     sparc64
1396     tilegx
1397     tilepro
1398     tomi
1399     x86
1400     x86_32
1401     x86_64
1402 "
1403
1404 ARCH_EXT_LIST_ARM="
1405     armv5te
1406     armv6
1407     armv6t2
1408     armv8
1409     neon
1410     vfp
1411     vfpv3
1412 "
1413
1414 ARCH_EXT_LIST_X86_SIMD="
1415     amd3dnow
1416     amd3dnowext
1417     avx
1418     avx2
1419     fma3
1420     fma4
1421     mmx
1422     mmxext
1423     sse
1424     sse2
1425     sse3
1426     sse4
1427     sse42
1428     ssse3
1429     xop
1430 "
1431
1432 ARCH_EXT_LIST_PPC="
1433     altivec
1434     dcbzl
1435     ldbrx
1436     power8
1437     ppc4xx
1438     vsx
1439 "
1440
1441 ARCH_EXT_LIST_X86="
1442     $ARCH_EXT_LIST_X86_SIMD
1443     cpunop
1444     i686
1445 "
1446
1447 ARCH_EXT_LIST_MIPS="
1448     loongson
1449     mips32r1
1450     mips64r1
1451     mips32r2
1452     mips64r2
1453     mips32r6
1454     mips64r6
1455 "
1456
1457 ARCH_EXT_LIST="
1458     $ARCH_EXT_LIST_ARM
1459     $ARCH_EXT_LIST_MIPS
1460     $ARCH_EXT_LIST_PPC
1461     $ARCH_EXT_LIST_X86
1462     vis
1463 "
1464
1465 ARCH_FEATURES="
1466     aligned_stack
1467     fast_64bit
1468     fast_clz
1469     fast_cmov
1470     local_aligned_8
1471     local_aligned_16
1472     simd_align_16
1473 "
1474
1475 BUILTIN_LIST="
1476     atomic_cas_ptr
1477     machine_rw_barrier
1478     MemoryBarrier
1479     mm_empty
1480     rdtsc
1481     sync_val_compare_and_swap
1482 "
1483 HAVE_LIST_CMDLINE="
1484     inline_asm
1485     symver
1486     yasm
1487 "
1488
1489 HAVE_LIST_PUB="
1490     bigendian
1491     fast_unaligned
1492 "
1493
1494 HEADERS_LIST="
1495     AVFoundation_AVFoundation_h
1496     alsa_asoundlib_h
1497     altivec_h
1498     arpa_inet_h
1499     cdio_paranoia_h
1500     cdio_paranoia_paranoia_h
1501     dev_bktr_ioctl_bt848_h
1502     dev_bktr_ioctl_meteor_h
1503     dev_ic_bt8xx_h
1504     dev_video_bktr_ioctl_bt848_h
1505     dev_video_meteor_ioctl_meteor_h
1506     direct_h
1507     dlfcn_h
1508     d3d11_h
1509     dxva_h
1510     gsm_h
1511     io_h
1512     mach_mach_time_h
1513     machine_ioctl_bt848_h
1514     machine_ioctl_meteor_h
1515     malloc_h
1516     poll_h
1517     sndio_h
1518     soundcard_h
1519     sys_mman_h
1520     sys_param_h
1521     sys_resource_h
1522     sys_select_h
1523     sys_soundcard_h
1524     sys_time_h
1525     sys_un_h
1526     sys_videoio_h
1527     unistd_h
1528     valgrind_valgrind_h
1529     windows_h
1530     winsock2_h
1531 "
1532
1533 INTRINSICS_LIST="
1534     intrinsics_neon
1535 "
1536
1537 MATH_FUNCS="
1538     atanf
1539     atan2f
1540     cbrtf
1541     cosf
1542     exp2
1543     exp2f
1544     expf
1545     isinf
1546     isnan
1547     ldexpf
1548     llrint
1549     llrintf
1550     log2
1551     log2f
1552     log10f
1553     lrint
1554     lrintf
1555     powf
1556     rint
1557     round
1558     roundf
1559     sinf
1560     trunc
1561     truncf
1562 "
1563
1564 SYSTEM_FUNCS="
1565     aligned_malloc
1566     clock_gettime
1567     closesocket
1568     CommandLineToArgvW
1569     CoTaskMemFree
1570     CryptGenRandom
1571     dlopen
1572     fcntl
1573     flt_lim
1574     fork
1575     getaddrinfo
1576     gethrtime
1577     getopt
1578     GetProcessAffinityMask
1579     GetProcessMemoryInfo
1580     GetProcessTimes
1581     getrusage
1582     GetSystemTimeAsFileTime
1583     gettimeofday
1584     gmtime_r
1585     inet_aton
1586     isatty
1587     jack_port_get_latency_range
1588     LoadLibrary
1589     localtime_r
1590     mach_absolute_time
1591     MapViewOfFile
1592     memalign
1593     mkstemp
1594     mmap
1595     mprotect
1596     nanosleep
1597     posix_memalign
1598     sched_getaffinity
1599     SetConsoleTextAttribute
1600     setmode
1601     setrlimit
1602     Sleep
1603     strerror_r
1604     sysconf
1605     sysctl
1606     usleep
1607     VirtualAlloc
1608 "
1609
1610 TOOLCHAIN_FEATURES="
1611     as_dn_directive
1612     as_func
1613     as_object_arch
1614     asm_mod_q
1615     attribute_may_alias
1616     attribute_packed
1617     ebp_available
1618     ebx_available
1619     gnu_as
1620     ibm_asm
1621     inline_asm_labels
1622     pragma_deprecated
1623     symver_asm_label
1624     symver_gnu_asm
1625     vfp_args
1626     xform_asm
1627     xmm_clobbers
1628 "
1629
1630 TYPES_LIST="
1631     CONDITION_VARIABLE_Ptr
1632     socklen_t
1633     struct_addrinfo
1634     struct_group_source_req
1635     struct_ip_mreq_source
1636     struct_ipv6_mreq
1637     struct_pollfd
1638     struct_rusage_ru_maxrss
1639     struct_sockaddr_in6
1640     struct_sockaddr_sa_len
1641     struct_sockaddr_storage
1642     struct_v4l2_frmivalenum_discrete
1643 "
1644
1645 HAVE_LIST="
1646     $ARCH_EXT_LIST
1647     $(add_suffix _external $ARCH_EXT_LIST)
1648     $(add_suffix _inline   $ARCH_EXT_LIST)
1649     $ARCH_FEATURES
1650     $ATOMICS_LIST
1651     $BUILTIN_LIST
1652     $HAVE_LIST_CMDLINE
1653     $HAVE_LIST_PUB
1654     $HEADERS_LIST
1655     $INTRINSICS_LIST
1656     $MATH_FUNCS
1657     $SYSTEM_FUNCS
1658     $THREADS_LIST
1659     $TOOLCHAIN_FEATURES
1660     $TYPES_LIST
1661     atomics_native
1662     dos_paths
1663     dxva2_lib
1664     libc_msvcrt
1665     libdc1394_1
1666     libdc1394_2
1667     sdl
1668     section_data_rel_ro
1669     threads
1670     vaapi_x11
1671     vdpau_x11
1672     xlib
1673 "
1674
1675 # options emitted with CONFIG_ prefix but not available on the command line
1676 CONFIG_EXTRA="
1677     aandcttables
1678     ac3dsp
1679     audio_frame_queue
1680     audiodsp
1681     blockdsp
1682     bswapdsp
1683     cabac
1684     dirac_parse
1685     dvprofile
1686     faandct
1687     faanidct
1688     fdctdsp
1689     flacdsp
1690     fmtconvert
1691     g722dsp
1692     gcrypt
1693     gmp
1694     golomb
1695     gplv3
1696     h263dsp
1697     h264chroma
1698     h264dsp
1699     h264pred
1700     h264qpel
1701     hpeldsp
1702     huffman
1703     huffyuvdsp
1704     huffyuvencdsp
1705     idctdsp
1706     iirfilter
1707     imdct15
1708     intrax8
1709     ividsp
1710     jpegtables
1711     libx262
1712     lgplv3
1713     lpc
1714     lzf
1715     me_cmp
1716     mpeg_er
1717     mpegaudio
1718     mpegaudiodsp
1719     mpegvideo
1720     mpegvideoenc
1721     mss34dsp
1722     pixblockdsp
1723     qpeldsp
1724     qsv
1725     qsvdec
1726     qsvenc
1727     rangecoder
1728     riffdec
1729     riffenc
1730     rtpdec
1731     rtpenc_chain
1732     rv34dsp
1733     sinewin
1734     snappy
1735     startcode
1736     texturedsp
1737     texturedspenc
1738     tpeldsp
1739     videodsp
1740     vp3dsp
1741     vp56dsp
1742     vp8dsp
1743     wma_freqs
1744     wmv2dsp
1745 "
1746
1747 CMDLINE_SELECT="
1748     $ARCH_EXT_LIST
1749     $CONFIG_LIST
1750     $HAVE_LIST_CMDLINE
1751     $THREADS_LIST
1752     asm
1753     cross_compile
1754     debug
1755     extra_warnings
1756     logging
1757     lto
1758     optimizations
1759     rpath
1760 "
1761
1762 PATHS_LIST="
1763     bindir
1764     datadir
1765     docdir
1766     incdir
1767     libdir
1768     mandir
1769     prefix
1770     shlibdir
1771 "
1772
1773 CMDLINE_SET="
1774     $PATHS_LIST
1775     ar
1776     arch
1777     as
1778     build_suffix
1779     cc
1780     objcc
1781     cpu
1782     cross_prefix
1783     custom_allocator
1784     dep_cc
1785     env
1786     extra_version
1787     host_cc
1788     host_cflags
1789     host_ld
1790     host_ldflags
1791     host_libs
1792     host_os
1793     ld
1794     logfile
1795     malloc_prefix
1796     nm
1797     optflags
1798     pkg_config
1799     pkg_config_flags
1800     random_seed
1801     samples
1802     sysinclude
1803     sysroot
1804     target_exec
1805     target_os
1806     target_path
1807     target_samples
1808     toolchain
1809 "
1810
1811 CMDLINE_APPEND="
1812     extra_cflags
1813     extra_objcflags
1814     host_cppflags
1815 "
1816
1817 # code dependency declarations
1818
1819 # architecture extensions
1820
1821 armv5te_deps="arm"
1822 armv6_deps="arm"
1823 armv6t2_deps="arm"
1824 armv8_deps="aarch64"
1825 neon_deps_any="aarch64 arm"
1826 intrinsics_neon_deps="neon"
1827 vfp_deps_any="aarch64 arm"
1828 vfpv3_deps="vfp"
1829
1830 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1831
1832 altivec_deps="ppc"
1833 ppc4xx_deps="ppc"
1834 vsx_deps="altivec"
1835 power8_deps="vsx"
1836
1837 cpunop_deps="i686"
1838 x86_64_select="i686"
1839 x86_64_suggest="fast_cmov"
1840
1841 amd3dnow_deps="mmx"
1842 amd3dnowext_deps="amd3dnow"
1843 i686_deps="x86"
1844 mmx_deps="x86"
1845 mmxext_deps="mmx"
1846 sse_deps="mmxext"
1847 sse2_deps="sse"
1848 sse3_deps="sse2"
1849 ssse3_deps="sse3"
1850 sse4_deps="ssse3"
1851 sse42_deps="sse4"
1852 avx_deps="sse42"
1853 xop_deps="avx"
1854 fma3_deps="avx"
1855 fma4_deps="avx"
1856 avx2_deps="avx"
1857
1858 mmx_external_deps="yasm"
1859 mmx_inline_deps="inline_asm"
1860 mmx_suggest="mmx_external mmx_inline"
1861
1862 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1863     eval dep=\$${ext}_deps
1864     eval ${ext}_external_deps='"${dep}_external"'
1865     eval ${ext}_inline_deps='"${dep}_inline"'
1866     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1867 done
1868
1869 aligned_stack_if_any="aarch64 ppc x86"
1870 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1871 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1872 fast_unaligned_if_any="aarch64 ppc x86"
1873 simd_align_16_if_any="altivec neon sse"
1874
1875 # system capabilities
1876 symver_if_any="symver_asm_label symver_gnu_asm"
1877 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
1878
1879 # threading support
1880 atomics_gcc_if="sync_val_compare_and_swap"
1881 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1882 atomics_win32_if="MemoryBarrier"
1883 atomics_native_if_any="$ATOMICS_LIST"
1884 w32threads_deps="atomics_native"
1885 threads_if_any="$THREADS_LIST"
1886
1887 # subsystems
1888 dct_select="rdft"
1889 dirac_parse_select="golomb"
1890 error_resilience_select="me_cmp"
1891 faandct_deps="faan fdctdsp"
1892 faanidct_deps="faan idctdsp"
1893 intrax8_select="error_resilience"
1894 mdct_select="fft"
1895 rdft_select="fft"
1896 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1897 mpeg_er_select="error_resilience"
1898 mpegaudio_select="mpegaudiodsp"
1899 mpegaudiodsp_select="dct"
1900 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp videodsp"
1901 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1902 nvenc_deps_any="dlopen LoadLibrary"
1903 nvenc_extralibs='$ldl'
1904 qsvdec_select="qsv"
1905 qsvenc_select="qsv"
1906
1907 # decoders / encoders
1908 aac_decoder_select="imdct15 mdct sinewin"
1909 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1910 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1911 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1912 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1913 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1914 adpcm_g722_decoder_select="g722dsp"
1915 adpcm_g722_encoder_select="g722dsp"
1916 aic_decoder_select="golomb idctdsp"
1917 alac_encoder_select="lpc"
1918 als_decoder_select="bswapdsp"
1919 amrnb_decoder_select="lsp"
1920 amrwb_decoder_select="lsp"
1921 amv_decoder_select="sp5x_decoder"
1922 ape_decoder_select="bswapdsp"
1923 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1924 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1925 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1926 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1927 atrac1_decoder_select="mdct sinewin"
1928 atrac3_decoder_select="mdct"
1929 atrac3p_decoder_select="mdct sinewin"
1930 bink_decoder_select="blockdsp hpeldsp"
1931 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1932 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1933 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1934 cllc_decoder_select="bswapdsp"
1935 comfortnoise_encoder_select="lpc"
1936 cook_decoder_select="audiodsp mdct sinewin"
1937 cscd_decoder_select="lzo"
1938 cscd_decoder_suggest="zlib"
1939 dca_decoder_select="fmtconvert mdct"
1940 dds_decoder_select="texturedsp"
1941 dnxhd_decoder_select="blockdsp idctdsp"
1942 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1943 dvvideo_decoder_select="dvprofile idctdsp"
1944 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1945 dxa_decoder_deps="zlib"
1946 dxv_decoder_select="lzf texturedsp"
1947 eac3_decoder_select="ac3_decoder"
1948 eac3_encoder_select="ac3_encoder"
1949 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1950 eatgq_decoder_select="aandcttables idctdsp"
1951 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
1952 exr_decoder_deps="zlib"
1953 ffv1_decoder_select="golomb rangecoder"
1954 ffv1_encoder_select="rangecoder"
1955 ffvhuff_decoder_select="huffyuv_decoder"
1956 ffvhuff_encoder_select="huffyuv_encoder"
1957 fic_decoder_select="golomb"
1958 flac_decoder_select="flacdsp golomb"
1959 flac_encoder_select="bswapdsp flacdsp golomb lpc"
1960 flashsv_decoder_deps="zlib"
1961 flashsv_encoder_deps="zlib"
1962 flashsv2_decoder_deps="zlib"
1963 flv_decoder_select="h263_decoder"
1964 flv_encoder_select="h263_encoder"
1965 fourxm_decoder_select="blockdsp bswapdsp"
1966 fraps_decoder_select="bswapdsp huffman"
1967 g2m_decoder_deps="zlib"
1968 g2m_decoder_select="blockdsp idctdsp jpegtables"
1969 h261_decoder_select="mpeg_er mpegvideo"
1970 h261_encoder_select="aandcttables mpegvideoenc"
1971 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
1972 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1973 h263i_decoder_select="h263_decoder"
1974 h263p_encoder_select="h263_encoder"
1975 h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel startcode videodsp"
1976 h264_decoder_suggest="error_resilience"
1977 h264_nvenc_encoder_deps="nvenc"
1978 h264_qsv_decoder_deps="libmfx"
1979 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
1980 h264_qsv_encoder_deps="libmfx"
1981 h264_qsv_encoder_select="qsvenc"
1982 hap_decoder_select="snappy texturedsp"
1983 hap_encoder_deps="libsnappy"
1984 hap_encoder_select="texturedspenc"
1985 hevc_decoder_select="bswapdsp cabac golomb videodsp"
1986 hevc_nvenc_encoder_deps="nvenc"
1987 hevc_qsv_encoder_deps="libmfx"
1988 hevc_qsv_decoder_deps="libmfx"
1989 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser qsvdec hevc_qsv_hwaccel"
1990 hevc_qsv_encoder_select="qsvenc"
1991 huffyuv_decoder_select="bswapdsp huffyuvdsp"
1992 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
1993 iac_decoder_select="imc_decoder"
1994 imc_decoder_select="bswapdsp fft mdct sinewin"
1995 indeo3_decoder_select="hpeldsp"
1996 indeo4_decoder_select="ividsp"
1997 indeo5_decoder_select="ividsp"
1998 interplay_video_decoder_select="hpeldsp"
1999 jpegls_decoder_select="golomb mjpeg_decoder"
2000 jpegls_encoder_select="golomb"
2001 jv_decoder_select="blockdsp"
2002 lagarith_decoder_select="huffyuvdsp"
2003 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
2004 loco_decoder_select="golomb"
2005 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2006 metasound_decoder_select="lsp mdct sinewin"
2007 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2008 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
2009 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
2010 mjpegb_decoder_select="mjpeg_decoder"
2011 mlp_decoder_select="mlp_parser"
2012 motionpixels_decoder_select="bswapdsp"
2013 mp1_decoder_select="mpegaudio"
2014 mp1float_decoder_select="mpegaudio"
2015 mp2_decoder_select="mpegaudio"
2016 mp2float_decoder_select="mpegaudio"
2017 mp3_decoder_select="mpegaudio"
2018 mp3adu_decoder_select="mpegaudio"
2019 mp3adufloat_decoder_select="mpegaudio"
2020 mp3float_decoder_select="mpegaudio"
2021 mp3on4_decoder_select="mpegaudio"
2022 mp3on4float_decoder_select="mpegaudio"
2023 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2024 mpc8_decoder_select="mpegaudiodsp"
2025 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2026 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2027 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2028 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2029 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2030 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2031 mpeg2_qsv_decoder_deps="libmfx"
2032 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2033 mpeg2_qsv_encoder_deps="libmfx"
2034 mpeg2_qsv_encoder_select="qsvenc"
2035 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2036 mpeg4_encoder_select="h263_encoder"
2037 msa1_decoder_select="mss34dsp"
2038 msmpeg4v1_decoder_select="h263_decoder"
2039 msmpeg4v2_decoder_select="h263_decoder"
2040 msmpeg4v2_encoder_select="h263_encoder"
2041 msmpeg4v3_decoder_select="h263_decoder"
2042 msmpeg4v3_encoder_select="h263_encoder"
2043 mss2_decoder_select="error_resilience mpeg_er qpeldsp vc1_decoder"
2044 mts2_decoder_select="mss34dsp"
2045 mxpeg_decoder_select="mjpeg_decoder"
2046 nellymoser_decoder_select="mdct sinewin"
2047 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2048 nuv_decoder_select="idctdsp lzo"
2049 nvenc_h264_encoder_deps="nvenc"
2050 nvenc_hevc_encoder_deps="nvenc"
2051 on2avc_decoder_select="mdct"
2052 opus_decoder_deps="avresample"
2053 opus_decoder_select="imdct15"
2054 png_decoder_deps="zlib"
2055 png_encoder_deps="zlib"
2056 png_encoder_select="huffyuvencdsp"
2057 prores_decoder_select="idctdsp"
2058 prores_encoder_select="fdctdsp"
2059 qcelp_decoder_select="lsp"
2060 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2061 ra_144_encoder_select="audio_frame_queue lpc"
2062 ralf_decoder_select="golomb"
2063 rscc_decoder_deps="zlib"
2064 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2065 rv10_encoder_select="h263_encoder"
2066 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2067 rv20_encoder_select="h263_encoder"
2068 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2069 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2070 screenpresso_decoder_deps="zlib"
2071 shorten_decoder_select="golomb"
2072 sipr_decoder_select="lsp"
2073 sp5x_decoder_select="mjpeg_decoder"
2074 svq1_decoder_select="hpeldsp"
2075 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2076 svq3_decoder_select="h264_decoder hpeldsp tpeldsp"
2077 svq3_decoder_suggest="zlib"
2078 tak_decoder_select="audiodsp"
2079 tdsc_decoder_deps="zlib"
2080 tdsc_decoder_select="mjpeg_decoder"
2081 theora_decoder_select="vp3_decoder"
2082 thp_decoder_select="mjpeg_decoder"
2083 tiff_decoder_suggest="zlib"
2084 tiff_encoder_suggest="zlib"
2085 truehd_decoder_select="mlp_decoder"
2086 truemotion2_decoder_select="bswapdsp"
2087 truespeech_decoder_select="bswapdsp"
2088 tscc_decoder_deps="zlib"
2089 txd_decoder_select="texturedsp"
2090 twinvq_decoder_select="mdct lsp sinewin"
2091 utvideo_decoder_select="bswapdsp"
2092 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2093 vble_decoder_select="huffyuvdsp"
2094 vc1_decoder_select="blockdsp error_resilience h263_decoder h264chroma h264qpel intrax8 mpeg_er qpeldsp startcode"
2095 vc1image_decoder_select="vc1_decoder"
2096 vorbis_decoder_select="mdct"
2097 vorbis_encoder_select="mdct"
2098 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2099 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2100 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2101 vp6a_decoder_select="vp6_decoder"
2102 vp6f_decoder_select="vp6_decoder"
2103 vp7_decoder_select="h264pred videodsp vp8dsp"
2104 vp8_decoder_select="h264pred videodsp vp8dsp"
2105 vp9_decoder_select="videodsp"
2106 webp_decoder_select="vp8_decoder"
2107 wmapro_decoder_select="mdct sinewin wma_freqs"
2108 wmav1_decoder_select="mdct sinewin wma_freqs"
2109 wmav1_encoder_select="mdct sinewin wma_freqs"
2110 wmav2_decoder_select="mdct sinewin wma_freqs"
2111 wmav2_encoder_select="mdct sinewin wma_freqs"
2112 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2113 wmv1_decoder_select="h263_decoder"
2114 wmv1_encoder_select="h263_encoder"
2115 wmv2_decoder_select="blockdsp h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2116 wmv2_encoder_select="h263_encoder wmv2dsp"
2117 wmv3_decoder_select="vc1_decoder"
2118 wmv3image_decoder_select="wmv3_decoder"
2119 zerocodec_decoder_deps="zlib"
2120 zlib_decoder_deps="zlib"
2121 zlib_encoder_deps="zlib"
2122 zmbv_decoder_deps="zlib"
2123 zmbv_encoder_deps="zlib"
2124
2125 # hardware accelerators
2126 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2127 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2128 vaapi_deps="va_va_h"
2129 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2130 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2131 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2132
2133 h263_vaapi_hwaccel_deps="vaapi"
2134 h263_vaapi_hwaccel_select="h263_decoder"
2135 h264_d3d11va_hwaccel_deps="d3d11va"
2136 h264_d3d11va_hwaccel_select="h264_decoder"
2137 h264_dxva2_hwaccel_deps="dxva2"
2138 h264_dxva2_hwaccel_select="h264_decoder"
2139 h264_mmal_decoder_deps="mmal"
2140 h264_mmal_hwaccel_deps="mmal"
2141 h264_mmal_decoder_select="h264_decoder"
2142 h264_mmal_encoder_deps="mmal"
2143 h264_qsv_hwaccel_deps="libmfx"
2144 h264_vaapi_hwaccel_deps="vaapi"
2145 h264_vaapi_hwaccel_select="h264_decoder"
2146 h264_vda_hwaccel_deps="vda"
2147 h264_vda_hwaccel_select="h264_decoder"
2148 h264_vda_old_hwaccel_deps="vda"
2149 h264_vda_old_hwaccel_select="h264_decoder"
2150 h264_vdpau_hwaccel_deps="vdpau"
2151 h264_vdpau_hwaccel_select="h264_decoder"
2152 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2153 hevc_d3d11va_hwaccel_select="hevc_decoder"
2154 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2155 hevc_dxva2_hwaccel_select="hevc_decoder"
2156 hevc_qsv_hwaccel_deps="libmfx"
2157 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2158 hevc_vdpau_hwaccep_select="hevc_decoder"
2159 mpeg1_vdpau_hwaccel_deps="vdpau"
2160 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2161 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2162 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2163 mpeg2_dxva2_hwaccel_deps="dxva2"
2164 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2165 mpeg2_qsv_hwaccel_deps="libmfx"
2166 mpeg2_vaapi_hwaccel_deps="vaapi"
2167 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2168 mpeg2_vdpau_hwaccel_deps="vdpau"
2169 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2170 mpeg4_vaapi_hwaccel_deps="vaapi"
2171 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2172 mpeg4_vdpau_hwaccel_deps="vdpau"
2173 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2174 vc1_d3d11va_hwaccel_deps="d3d11va"
2175 vc1_d3d11va_hwaccel_select="vc1_decoder"
2176 vc1_dxva2_hwaccel_deps="dxva2"
2177 vc1_dxva2_hwaccel_select="vc1_decoder"
2178 vc1_vaapi_hwaccel_deps="vaapi"
2179 vc1_vaapi_hwaccel_select="vc1_decoder"
2180 vc1_vdpau_hwaccel_deps="vdpau"
2181 vc1_vdpau_hwaccel_select="vc1_decoder"
2182 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2183 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2184 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2185 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2186
2187 # parsers
2188 h264_parser_select="h264_decoder"
2189 hevc_parser_select="golomb"
2190 mpegvideo_parser_select="mpegvideo"
2191 mpeg4video_parser_select="error_resilience h263dsp mpeg_er mpegvideo qpeldsp"
2192 vc1_parser_select="mpegvideo startcode vc1_decoder"
2193
2194 # bitstream_filters
2195 mjpeg2jpeg_bsf_select="jpegtables"
2196
2197 # external libraries
2198 libdcadec_decoder_deps="libdcadec"
2199 libfaac_encoder_deps="libfaac"
2200 libfaac_encoder_select="audio_frame_queue"
2201 libfdk_aac_decoder_deps="libfdk_aac"
2202 libfdk_aac_encoder_deps="libfdk_aac"
2203 libfdk_aac_encoder_select="audio_frame_queue"
2204 libgsm_decoder_deps="libgsm"
2205 libgsm_encoder_deps="libgsm"
2206 libgsm_ms_decoder_deps="libgsm"
2207 libgsm_ms_encoder_deps="libgsm"
2208 libilbc_decoder_deps="libilbc"
2209 libilbc_encoder_deps="libilbc"
2210 libkvazaar_encoder_deps="libkvazaar"
2211 libmp3lame_encoder_deps="libmp3lame"
2212 libmp3lame_encoder_select="audio_frame_queue"
2213 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2214 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2215 libopencore_amrnb_encoder_select="audio_frame_queue"
2216 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2217 libopenh264_encoder_deps="libopenh264"
2218 libopenjpeg_decoder_deps="libopenjpeg"
2219 libopenjpeg_encoder_deps="libopenjpeg"
2220 libopus_decoder_deps="libopus"
2221 libopus_encoder_deps="libopus"
2222 libopus_encoder_select="audio_frame_queue"
2223 libschroedinger_decoder_deps="libschroedinger"
2224 libschroedinger_encoder_deps="libschroedinger"
2225 libspeex_decoder_deps="libspeex"
2226 libspeex_encoder_deps="libspeex"
2227 libspeex_encoder_select="audio_frame_queue"
2228 libtheora_encoder_deps="libtheora"
2229 libtwolame_encoder_deps="libtwolame"
2230 libvo_aacenc_encoder_deps="libvo_aacenc"
2231 libvo_aacenc_encoder_select="audio_frame_queue"
2232 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2233 libvorbis_encoder_deps="libvorbis"
2234 libvorbis_encoder_select="audio_frame_queue"
2235 libvpx_vp8_decoder_deps="libvpx"
2236 libvpx_vp8_encoder_deps="libvpx"
2237 libvpx_vp9_decoder_deps="libvpx"
2238 libvpx_vp9_encoder_deps="libvpx"
2239 libwavpack_encoder_deps="libwavpack"
2240 libwebp_encoder_deps="libwebp"
2241 libx262_encoder_deps="libx262"
2242 libx264_encoder_deps="libx264"
2243 libx265_encoder_deps="libx265"
2244 libxavs_encoder_deps="libxavs"
2245 libxvid_encoder_deps="libxvid"
2246
2247 # demuxers / muxers
2248 ac3_demuxer_select="ac3_parser"
2249 asf_demuxer_select="riffdec"
2250 asf_muxer_select="riffenc"
2251 asf_stream_muxer_select="asf_muxer"
2252 avi_demuxer_select="riffdec"
2253 avi_muxer_select="riffenc"
2254 avisynth_demuxer_deps="avisynth"
2255 avisynth_demuxer_select="riffdec"
2256 caf_demuxer_select="riffdec"
2257 dash_muxer_select="mp4_muxer"
2258 dirac_demuxer_select="dirac_parser"
2259 dv_demuxer_select="dvprofile"
2260 dv_muxer_select="dvprofile"
2261 dxa_demuxer_select="riffdec"
2262 eac3_demuxer_select="ac3_parser"
2263 f4v_muxer_select="mov_muxer"
2264 flac_demuxer_select="flac_parser"
2265 hds_muxer_select="flv_muxer"
2266 hls_muxer_select="mpegts_muxer"
2267 ipod_muxer_select="mov_muxer"
2268 ismv_muxer_select="mov_muxer"
2269 matroska_audio_muxer_select="matroska_muxer"
2270 matroska_demuxer_select="riffdec"
2271 matroska_demuxer_suggest="bzlib lzo zlib"
2272 matroska_muxer_select="riffenc"
2273 mmf_muxer_select="riffenc"
2274 mov_demuxer_select="riffdec"
2275 mov_demuxer_suggest="zlib"
2276 mov_muxer_select="riffenc rtpenc_chain"
2277 mp3_demuxer_select="mpegaudio_parser"
2278 mp4_muxer_select="mov_muxer"
2279 mpegts_muxer_select="adts_muxer latm_muxer"
2280 mpegtsraw_demuxer_select="mpegts_demuxer"
2281 mxf_d10_muxer_select="mxf_muxer"
2282 nut_muxer_select="riffenc"
2283 nuv_demuxer_select="riffdec"
2284 oga_muxer_select="ogg_muxer"
2285 ogg_demuxer_select="dirac_parse"
2286 opus_muxer_select="ogg_muxer"
2287 psp_muxer_select="mov_muxer"
2288 rtp_demuxer_select="sdp_demuxer"
2289 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol"
2290 rtsp_demuxer_select="http_protocol rtpdec"
2291 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2292 sap_demuxer_select="sdp_demuxer"
2293 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2294 sdp_demuxer_select="rtpdec"
2295 smoothstreaming_muxer_select="ismv_muxer"
2296 spdif_muxer_select="aac_parser"
2297 spx_muxer_select="ogg_muxer"
2298 swf_demuxer_suggest="zlib"
2299 tak_demuxer_select="tak_parser"
2300 tg2_muxer_select="mov_muxer"
2301 tgp_muxer_select="mov_muxer"
2302 w64_demuxer_select="wav_demuxer"
2303 wav_demuxer_select="riffdec"
2304 wav_muxer_select="riffenc"
2305 webm_muxer_select="riffenc"
2306 webm_muxer_suggest="libopus_encoder libvorbis_encoder libvpx_vp8_encoder libvpx_vp9_encoder"
2307 wtv_demuxer_select="riffdec"
2308 xmv_demuxer_select="riffdec"
2309 xwma_demuxer_select="riffdec"
2310
2311 # indevs / outdevs
2312 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2313 alsa_outdev_deps="alsa_asoundlib_h"
2314 avfoundation_indev_deps="AVFoundation_AVFoundation_h"
2315 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2316 dv1394_indev_deps="dv1394"
2317 dv1394_indev_select="dv_demuxer"
2318 fbdev_indev_deps="linux_fb_h"
2319 jack_indev_deps="jack_jack_h pthreads"
2320 libcdio_indev_deps="libcdio"
2321 libdc1394_indev_deps="libdc1394"
2322 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2323 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2324 pulse_indev_deps="libpulse"
2325 sndio_indev_deps="sndio_h"
2326 sndio_outdev_deps="sndio_h"
2327 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2328 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2329 vfwcap_indev_extralibs="-lavicap32"
2330 x11grab_indev_deps="x11grab"
2331 x11grab_xcb_indev_deps="libxcb"
2332
2333 # protocols
2334 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2335 ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
2336 ffrtmpcrypt_protocol_select="tcp_protocol"
2337 ffrtmphttp_protocol_deps="!librtmp_protocol"
2338 ffrtmphttp_protocol_select="http_protocol"
2339 gopher_protocol_select="network"
2340 http_protocol_select="tcp_protocol"
2341 httpproxy_protocol_select="tcp_protocol"
2342 https_protocol_select="tls_protocol"
2343 icecast_protocol_select="http_protocol"
2344 librtmp_protocol_deps="librtmp"
2345 librtmpe_protocol_deps="librtmp"
2346 librtmps_protocol_deps="librtmp"
2347 librtmpt_protocol_deps="librtmp"
2348 librtmpte_protocol_deps="librtmp"
2349 mmsh_protocol_select="http_protocol"
2350 mmst_protocol_select="network"
2351 rtmp_protocol_deps="!librtmp_protocol"
2352 rtmp_protocol_select="tcp_protocol"
2353 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2354 rtmps_protocol_deps="!librtmp_protocol"
2355 rtmps_protocol_select="tls_protocol"
2356 rtmpt_protocol_select="ffrtmphttp_protocol"
2357 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2358 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2359 rtp_protocol_select="udp_protocol"
2360 sctp_protocol_deps="struct_sctp_event_subscribe"
2361 sctp_protocol_select="network"
2362 srtp_protocol_select="rtp_protocol"
2363 tcp_protocol_select="network"
2364 tls_gnutls_protocol_deps="gnutls"
2365 tls_gnutls_protocol_select="tcp_protocol"
2366 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
2367 tls_openssl_protocol_select="tcp_protocol"
2368 tls_protocol_select_any="tls_gnutls_protocol tls_openssl_protocol"
2369 udp_protocol_select="network"
2370 unix_protocol_deps="sys_un_h"
2371 unix_protocol_select="network"
2372
2373 # filters
2374 blackframe_filter_deps="gpl"
2375 boxblur_filter_deps="gpl"
2376 bs2b_filter_deps="libbs2b"
2377 cropdetect_filter_deps="gpl"
2378 delogo_filter_deps="gpl"
2379 drawtext_filter_deps="libfreetype"
2380 frei0r_filter_deps="frei0r dlopen"
2381 frei0r_filter_extralibs='$ldl'
2382 frei0r_src_filter_deps="frei0r dlopen"
2383 frei0r_src_filter_extralibs='$ldl'
2384 hqdn3d_filter_deps="gpl"
2385 hwupload_cuda_filter_deps="cuda"
2386 interlace_filter_deps="gpl"
2387 ocv_filter_deps="libopencv"
2388 resample_filter_deps="avresample"
2389 scale_filter_deps="swscale"
2390
2391 # examples
2392 avcodec_example_deps="avcodec avutil"
2393 filter_audio_example_deps="avfilter avutil"
2394 metadata_example_deps="avformat avutil"
2395 output_example_deps="avcodec avformat avutil swscale"
2396 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder vaapi_x11"
2397 transcode_aac_example_deps="avcodec avformat avresample"
2398
2399 # libraries, in linking order
2400 avcodec_deps="avutil"
2401 avdevice_deps="avformat avcodec avutil"
2402 avfilter_deps="avutil"
2403 avformat_deps="avcodec avutil"
2404 avresample_deps="avutil"
2405 swscale_deps="avutil"
2406
2407 # programs
2408 avconv_deps="avcodec avfilter avformat avresample swscale"
2409 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2410                fps_filter null_filter resample_filter scale_filter
2411                setpts_filter trim_filter"
2412 avplay_deps="avcodec avfilter avformat avresample sdl"
2413 avplay_libs='$sdl_libs'
2414 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2415 avprobe_deps="avcodec avformat"
2416
2417 # documentation
2418 pod2man_deps="doc"
2419 texi2html_deps="doc"
2420
2421 # default parameters
2422
2423 logfile="config.log"
2424
2425 # installation paths
2426 prefix_default="/usr/local"
2427 bindir_default='${prefix}/bin'
2428 datadir_default='${prefix}/share/avconv'
2429 docdir_default='${prefix}/share/doc/libav'
2430 incdir_default='${prefix}/include'
2431 libdir_default='${prefix}/lib'
2432 mandir_default='${prefix}/share/man'
2433 shlibdir_default="$libdir_default"
2434
2435 # toolchain
2436 ar_default="ar"
2437 cc_default="gcc"
2438 host_cc_default="gcc"
2439 cp_f="cp -f"
2440 ln_s="ln -s -f"
2441 nm_default="nm -g"
2442 objformat="elf"
2443 pkg_config_default=pkg-config
2444 ranlib="ranlib"
2445 strip="strip"
2446 yasmexe="yasm"
2447
2448 # machine
2449 arch_default=$(uname -m)
2450 cpu="generic"
2451 intrinsics="none"
2452
2453 # OS
2454 target_os_default=$(tolower $(uname -s))
2455 host_os=$target_os_default
2456
2457 # configurable options
2458 enable asm
2459 enable debug
2460 enable doc
2461 enable faan faandct faanidct
2462 enable optimizations
2463 enable safe_bitstream_reader
2464 enable static
2465 enable swscale_alpha
2466 enable valgrind_backtrace
2467
2468 # By default, enable only those hwaccels that have no external dependencies.
2469 enable d3d11va dxva2 vda vdpau
2470
2471 # build settings
2472 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2473 LIBPREF="lib"
2474 LIBSUF=".a"
2475 FULLNAME='$(NAME)$(BUILDSUF)'
2476 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2477 SLIBPREF="lib"
2478 SLIBSUF=".so"
2479 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2480 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2481 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2482 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2483 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2484 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2485
2486 asflags_filter=echo
2487 cflags_filter=echo
2488 ldflags_filter=echo
2489
2490 AS_C='-c'
2491 AS_O='-o $@'
2492 CC_C='-c'
2493 CC_E='-E -o $@'
2494 CC_O='-o $@'
2495 OBJCC_C='-c'
2496 OBJCC_E='-E -o $@'
2497 OBJCC_O='-o $@'
2498 LD_O='-o $@'
2499 LD_LIB='-l%'
2500 LD_PATH='-L'
2501 HOSTCC_C='-c'
2502 HOSTCC_E='-E -o $@'
2503 HOSTCC_O='-o $@'
2504 HOSTLD_O='-o $@'
2505
2506 host_libs='-lm'
2507 host_cflags_filter=echo
2508 host_ldflags_filter=echo
2509
2510 target_path='$(CURDIR)'
2511
2512 # since the object filename is not given with the -MM flag, the compiler
2513 # is only able to print the basename, and we must add the path ourselves
2514 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2515 DEPFLAGS='-MM'
2516
2517 # find source path
2518 if test -f configure; then
2519     source_path=.
2520 else
2521     source_path=$(cd $(dirname "$0"); pwd)
2522     echo "$source_path" | grep -q '[[:blank:]]' &&
2523         die "Out of tree builds are impossible with whitespace in source path."
2524     test -e "$source_path/config.h" &&
2525         die "Out of tree builds are impossible with config.h in source dir."
2526 fi
2527
2528 for v in "$@"; do
2529     r=${v#*=}
2530     l=${v%"$r"}
2531     r=$(sh_quote "$r")
2532     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2533 done
2534
2535 find_things(){
2536     thing=$1
2537     pattern=$2
2538     file=$source_path/$3
2539     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2540 }
2541
2542 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2543 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2544 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2545 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2546 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2547 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2548 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2549 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2550 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2551 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2552 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2553
2554 ALL_COMPONENTS="
2555     $BSF_LIST
2556     $DECODER_LIST
2557     $DEMUXER_LIST
2558     $ENCODER_LIST
2559     $FILTER_LIST
2560     $HWACCEL_LIST
2561     $INDEV_LIST
2562     $MUXER_LIST
2563     $OUTDEV_LIST
2564     $PARSER_LIST
2565     $PROTOCOL_LIST
2566 "
2567
2568 enable $ARCH_EXT_LIST
2569
2570 die_unknown(){
2571     echo "Unknown option \"$1\"."
2572     echo "See $0 --help for available options."
2573     exit 1
2574 }
2575
2576 print_3_columns() {
2577     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2578 }
2579
2580 show_list() {
2581     suffix=_$1
2582     shift
2583     echo $* | sed s/$suffix//g | print_3_columns
2584     exit 0
2585 }
2586
2587 rand_list(){
2588     IFS=', '
2589     set -- $*
2590     unset IFS
2591     for thing; do
2592         comp=${thing%:*}
2593         prob=${thing#$comp}
2594         prob=${prob#:}
2595         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2596         echo "prob ${prob:-0.5}"
2597         printf '%s\n' $comp
2598     done
2599 }
2600
2601 do_random(){
2602     action=$1
2603     shift
2604     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2605     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2606 }
2607
2608 for opt do
2609     optval="${opt#*=}"
2610     case "$opt" in
2611         --extra-ldflags=*)
2612             add_ldflags $optval
2613         ;;
2614         --extra-ldexeflags=*)
2615             add_ldexeflags $optval
2616         ;;
2617         --extra-libs=*)
2618             add_extralibs $optval
2619         ;;
2620         --disable-devices)
2621             disable $INDEV_LIST $OUTDEV_LIST
2622         ;;
2623         --enable-debug=*)
2624             debuglevel="$optval"
2625         ;;
2626         --disable-programs)
2627             disable $PROGRAM_LIST
2628         ;;
2629         --disable-everything)
2630             map 'eval disable \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2631             enable_deep_force $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2632         ;;
2633         --disable-all)
2634             map 'eval disable \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2635             disable $LIBRARY_LIST $PROGRAM_LIST doc
2636         ;;
2637         --enable-random|--disable-random)
2638             action=${opt%%-random}
2639             do_random ${action#--} $COMPONENT_LIST
2640         ;;
2641         --enable-random=*|--disable-random=*)
2642             action=${opt%%-random=*}
2643             do_random ${action#--} $optval
2644         ;;
2645         --enable-*=*|--disable-*=*)
2646             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2647             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2648             eval list=\$$(toupper $thing)_LIST
2649             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2650             test $action = enable && action="request"
2651             $action $(filter "$name" $list)
2652         ;;
2653         --enable-avserver|--disable-avserver*)
2654             warn "avserver has been removed, the ${opt} option is only"\
2655                  "provided for compatibility and will be removed in the future"
2656         ;;
2657         --enable-?*|--disable-?*)
2658             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2659             if is_in $option $COMPONENT_LIST; then
2660                 test $action = enable && action="enable_deep_force"
2661                 eval $action \$$(toupper ${option%s})_LIST
2662             elif is_in $option $CMDLINE_SELECT; then
2663                 test $action = enable && action="request"
2664                 $action $option
2665             else
2666                 die_unknown $opt
2667             fi
2668         ;;
2669         --list-*)
2670             NAME="${opt#--list-}"
2671             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2672             NAME=${NAME%s}
2673             eval show_list $NAME \$$(toupper $NAME)_LIST
2674         ;;
2675         --help|-h) show_help
2676         ;;
2677         *)
2678             optname="${opt%%=*}"
2679             optname="${optname#--}"
2680             optname=$(echo "$optname" | sed 's/-/_/g')
2681             if is_in $optname $CMDLINE_SET; then
2682                 eval $optname='$optval'
2683             elif is_in $optname $CMDLINE_APPEND; then
2684                 append $optname "$optval"
2685             else
2686                 die_unknown $opt
2687             fi
2688         ;;
2689     esac
2690 done
2691
2692 for e in $env; do
2693     eval "export $e"
2694 done
2695
2696 disabled logging && logfile=/dev/null
2697
2698 # Enable the default components if not disabled explicitly
2699
2700 enable_weak $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2701
2702 # Disable all the library-specific components if the library itself
2703 # is disabled, see AVCODEC_LIST and following _LIST variables.
2704
2705 disable_components(){
2706     disabled ${1} && disable_weak $(
2707         eval components="\$$(toupper ${1})_COMPONENTS"
2708         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2709     )
2710 }
2711
2712 map 'disable_components $v' $LIBRARY_LIST
2713
2714 # Mark components that had not been enabled/disabled explicitly
2715 # as enabled
2716
2717 for n in $COMPONENT_LIST; do
2718     v=$(toupper ${n%s})_LIST
2719     eval enable_weak \$$v
2720     eval ${n}_if_any="\$$v"
2721 done
2722
2723 # Make so that disabled libraries are enabled if a component
2724 # of them is requested
2725
2726 for n in $LIBRARY_LIST; do
2727     v=$(toupper ${n})_COMPONENTS
2728     eval ${n}_if_any="\$$v"
2729 done
2730
2731 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2732 set >> $logfile
2733
2734 case "$toolchain" in
2735     *-asan)
2736         cc_default="${toolchain%-asan}"
2737         add_cflags  -fsanitize=address
2738         add_ldflags -fsanitize=address
2739     ;;
2740     *-tsan)
2741         cc_default="${toolchain%-tsan}"
2742         add_cflags  -fsanitize=thread -pie
2743         add_ldflags -fsanitize=thread -pie
2744         case "$toolchain" in
2745             gcc-tsan)
2746                 add_cflags  -fPIC
2747                 add_ldflags -fPIC
2748                 ;;
2749         esac
2750     ;;
2751     *-usan)
2752         cc_default="${toolchain%-usan}"
2753         add_cflags  -fsanitize=undefined
2754         add_ldflags -fsanitize=undefined
2755         case "$toolchain" in
2756             clang-usan)
2757                 add_cflags -O1
2758                 ;;
2759         esac
2760     ;;
2761     valgrind-*)
2762         target_exec_default="valgrind"
2763         case "$toolchain" in
2764             valgrind-massif)
2765                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2766                 ;;
2767             valgrind-memcheck)
2768                 target_exec_args="--track-origins=yes --leak-check=full"
2769                 ;;
2770         esac
2771     ;;
2772     msvc)
2773         # Check whether the current MSVC version needs the C99 converter.
2774         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2775         # support enough of C99 to build libav. Default to the new
2776         # behaviour if the regexp was unable to match anything, since this
2777         # successfully parses the version number of existing supported
2778         # versions that require the converter (MSVC 2010 and 2012).
2779         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2780         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2781             cc_default="cl"
2782         else
2783             cc_default="c99wrap cl"
2784         fi
2785         ld_default="$source_path/compat/windows/mslink"
2786         nm_default="dumpbin -symbols"
2787         ar_default="lib"
2788         case "$arch" in
2789         arm*)
2790             as_default="armasm"
2791             ;;
2792         esac
2793         target_os_default="win32"
2794         # Use a relative path for TMPDIR. This makes sure all the
2795         # ffconf temp files are written with a relative path, avoiding
2796         # issues with msys/win32 path conversion for MSVC parameters
2797         # such as -Fo<file> or -out:<file>.
2798         TMPDIR=.
2799     ;;
2800     icl)
2801         cc_default="icl"
2802         ld_default="xilink"
2803         nm_default="dumpbin -symbols"
2804         ar_default="xilib"
2805         target_os_default="win32"
2806         TMPDIR=.
2807     ;;
2808     gcov)
2809         add_cflags  -fprofile-arcs -ftest-coverage
2810         add_ldflags -fprofile-arcs -ftest-coverage
2811     ;;
2812     hardened)
2813         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2814         add_cflags   -fno-strict-overflow -fstack-protector-all
2815         add_ldflags  -Wl,-z,relro -Wl,-z,now
2816     ;;
2817     ?*)
2818         die "Unknown toolchain $toolchain"
2819     ;;
2820 esac
2821
2822 test -n "$cross_prefix" && enable cross_compile
2823
2824 if enabled cross_compile; then
2825     test -n "$arch" && test -n "$target_os" ||
2826         die "Must specify target arch and OS when cross-compiling"
2827 fi
2828
2829 ar_default="${cross_prefix}${ar_default}"
2830 cc_default="${cross_prefix}${cc_default}"
2831 occ_default="${cross_prefix}${occ_default}"
2832 nm_default="${cross_prefix}${nm_default}"
2833 pkg_config_default="${cross_prefix}${pkg_config_default}"
2834 ranlib="${cross_prefix}${ranlib}"
2835 strip="${cross_prefix}${strip}"
2836
2837 sysinclude_default="${sysroot}/usr/include"
2838
2839 set_default arch cc pkg_config sysinclude target_exec target_os
2840 enabled cross_compile || host_cc_default=$cc
2841 set_default host_cc
2842
2843 if ! $pkg_config --version >/dev/null 2>&1; then
2844     warn "$pkg_config not found, library detection may fail."
2845     pkg_config=false
2846 fi
2847
2848 exesuf() {
2849     case $1 in
2850         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2851     esac
2852 }
2853
2854 EXESUF=$(exesuf $target_os)
2855 HOSTEXESUF=$(exesuf $host_os)
2856
2857 # set temporary file name
2858 : ${TMPDIR:=$TEMPDIR}
2859 : ${TMPDIR:=$TMP}
2860 : ${TMPDIR:=/tmp}
2861
2862 if ! check_cmd mktemp -u XXXXXX; then
2863     # simple replacement for missing mktemp
2864     # NOT SAFE FOR GENERAL USE
2865     mktemp(){
2866         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2867     }
2868 fi
2869
2870 tmpfile(){
2871     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2872         (set -C; exec > $tmp) 2>/dev/null ||
2873         die "Unable to create temporary file in $TMPDIR."
2874     append TMPFILES $tmp
2875     eval $1=$tmp
2876 }
2877
2878 trap 'rm -f -- $TMPFILES' EXIT
2879
2880 tmpfile TMPASM .asm
2881 tmpfile TMPC   .c
2882 tmpfile TMPE   $EXESUF
2883 tmpfile TMPH   .h
2884 tmpfile TMPO   .o
2885 tmpfile TMPS   .S
2886 tmpfile TMPSH  .sh
2887 tmpfile TMPV   .ver
2888
2889 unset -f mktemp
2890
2891 chmod +x $TMPE
2892
2893 # make sure we can execute files in $TMPDIR
2894 cat > $TMPSH 2>> $logfile <<EOF
2895 #! /bin/sh
2896 EOF
2897 chmod +x $TMPSH >> $logfile 2>&1
2898 if ! $TMPSH >> $logfile 2>&1; then
2899     cat <<EOF
2900 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2901 variable to another directory and make sure that it is not mounted noexec.
2902 EOF
2903     die "Sanity test failed."
2904 fi
2905
2906 armasm_flags(){
2907     for flag; do
2908         case $flag in
2909             # Filter out MSVC cl.exe options from cflags that shouldn't
2910             # be passed to gas-preprocessor
2911             -M[TD]*)                                            ;;
2912             *)                  echo $flag                      ;;
2913         esac
2914    done
2915 }
2916
2917 ccc_flags(){
2918     for flag; do
2919         case $flag in
2920             -std=c99)           echo -c99                       ;;
2921             -mcpu=*)            echo -arch ${flag#*=}           ;;
2922             -mieee)             echo -ieee                      ;;
2923             -O*|-fast)          echo $flag                      ;;
2924             -fno-math-errno)    echo -assume nomath_errno       ;;
2925             -g)                 echo -g3                        ;;
2926             -Wall)              echo -msg_enable level2         ;;
2927             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2928             -Wl,*)              echo $flag                      ;;
2929             -f*|-W*)                                            ;;
2930             *)                  echo $flag                      ;;
2931         esac
2932    done
2933 }
2934
2935 cparser_flags(){
2936     for flag; do
2937         case $flag in
2938             -Wno-switch)             echo -Wno-switch-enum ;;
2939             -Wno-format-zero-length) ;;
2940             -Wdisabled-optimization) ;;
2941             -Wno-pointer-sign)       echo -Wno-other ;;
2942             *)                       echo $flag ;;
2943         esac
2944     done
2945 }
2946
2947 msvc_common_flags(){
2948     for flag; do
2949         case $flag in
2950             # In addition to specifying certain flags under the compiler
2951             # specific filters, they must be specified here as well or else the
2952             # generic catch all at the bottom will print the original flag.
2953             -Wall)                ;;
2954             -std=c99)             ;;
2955             # Common flags
2956             -fomit-frame-pointer) ;;
2957             -g)                   echo -Z7 ;;
2958             -fno-math-errno)      ;;
2959             -fno-common)          ;;
2960             -fno-signed-zeros)    ;;
2961             -fPIC)                ;;
2962             -mthumb)              ;;
2963             -march=*)             ;;
2964             -lz)                  echo zlib.lib ;;
2965             -lavifil32)           echo vfw32.lib ;;
2966             -lavicap32)           echo vfw32.lib user32.lib ;;
2967             -lx264)               echo libx264.lib ;;
2968             -l*)                  echo ${flag#-l}.lib ;;
2969             -L*)                  echo -libpath:${flag#-L} ;;
2970             *)                    echo $flag ;;
2971         esac
2972     done
2973 }
2974
2975 msvc_flags(){
2976     msvc_common_flags "$@"
2977     for flag; do
2978         case $flag in
2979             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
2980                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
2981                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
2982                                        -wd4273 -wd4554 -wd4701 ;;
2983         esac
2984     done
2985 }
2986
2987 icl_flags(){
2988     msvc_common_flags "$@"
2989     for flag; do
2990         case $flag in
2991             # Despite what Intel's documentation says -Wall, which is supported
2992             # on Windows, does enable remarks so disable them here.
2993             -Wall)                echo $flag -Qdiag-disable:remark ;;
2994             -std=c99)             echo -Qstd=c99 ;;
2995         esac
2996     done
2997 }
2998
2999 pgi_flags(){
3000     for flag; do
3001         case $flag in
3002             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3003             -fomit-frame-pointer) echo -Mnoframe ;;
3004             -g)                   echo -gopt ;;
3005             *)                    echo $flag ;;
3006         esac
3007     done
3008 }
3009
3010 suncc_flags(){
3011     for flag; do
3012         case $flag in
3013             -march=*|-mcpu=*)
3014                 case "${flag#*=}" in
3015                     native)                   echo -xtarget=native       ;;
3016                     v9|niagara)               echo -xarch=sparc          ;;
3017                     ultrasparc)               echo -xarch=sparcvis       ;;
3018                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3019                     i586|pentium)             echo -xchip=pentium        ;;
3020                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3021                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3022                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3023                     pentium4*)          echo -xtarget=pentium4           ;;
3024                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3025                     *-sse3)             echo -xarch=sse3                 ;;
3026                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3027                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3028                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3029                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3030                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3031                     k8|opteron|athlon64|athlon-fx)
3032                                                echo -xarch=sse2a         ;;
3033                     athlon*)                   echo -xarch=pentium_proa  ;;
3034                 esac
3035                 ;;
3036             -std=c99)             echo -xc99              ;;
3037             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3038             -fPIC)                echo -KPIC -xcode=pic32 ;;
3039             -W*,*)                echo $flag              ;;
3040             -f*-*|-W*|-mimpure-text)                      ;;
3041             -shared)              echo -G                 ;;
3042             *)                    echo $flag              ;;
3043         esac
3044     done
3045 }
3046
3047 tms470_flags(){
3048     for flag; do
3049         case $flag in
3050             -march=*|-mcpu=*)
3051                 case "${flag#*=}" in
3052                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3053                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3054                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3055                     armv6*|arm11*)          echo -mv=6   ;;
3056                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3057                                             echo -mv=5e  ;;
3058                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3059                 esac
3060                 ;;
3061             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3062             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3063             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3064             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3065             -msoft-float)   echo --float_support=vfplib       ;;
3066             -O[0-3]|-mf=*)  echo $flag                        ;;
3067             -g)             echo -g -mn                       ;;
3068             -pds=*)         echo $flag                        ;;
3069             -D*|-I*)        echo $flag                        ;;
3070             --gcc|--abi=*)  echo $flag                        ;;
3071             -me)            echo $flag                        ;;
3072         esac
3073     done
3074 }
3075
3076 probe_cc(){
3077     pfx=$1
3078     _cc=$2
3079
3080     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3081     unset _ld_o _ldflags _ld_lib _ld_path
3082     unset _depflags _DEPCMD _DEPFLAGS
3083     _flags_filter=echo
3084
3085     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3086         _type=llvm_gcc
3087         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3088         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3089         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3090         _cflags_speed='-O3'
3091         _cflags_size='-Os'
3092     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3093         _type=gcc
3094         gcc_version=$($_cc --version | head -n1)
3095         gcc_basever=$($_cc -dumpversion)
3096         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3097         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3098         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3099         if ! $_cc -dumpversion | grep -q '^2\.'; then
3100             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3101         fi
3102         _cflags_speed='-O3'
3103         _cflags_size='-Os'
3104     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3105         _type=icc
3106         _ident=$($_cc --version | head -n1)
3107         _depflags='-MMD'
3108         _cflags_speed='-O3'
3109         _cflags_size='-Os'
3110         _cflags_noopt='-O1'
3111     elif $_cc -v 2>&1 | grep -q xlc; then
3112         _type=xlc
3113         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3114         _cflags_speed='-O5'
3115         _cflags_size='-O5 -qcompact'
3116     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3117         _type=ccc
3118         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3119         _DEPFLAGS='-M'
3120         _cflags_speed='-fast'
3121         _cflags_size='-O1'
3122         _flags_filter=ccc_flags
3123     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3124         test -d "$sysroot" || die "No valid sysroot specified."
3125         _type=armcc
3126         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3127         armcc_conf="$PWD/armcc.conf"
3128         $_cc --arm_linux_configure                 \
3129              --arm_linux_config_file="$armcc_conf" \
3130              --configure_sysroot="$sysroot"        \
3131              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3132              die "Error creating armcc configuration file."
3133         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3134         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3135         as_default="${cross_prefix}gcc"
3136         _depflags='-MMD'
3137         _cflags_speed='-O3'
3138         _cflags_size='-Os'
3139     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3140         _type=tms470
3141         _ident=$($_cc -version | head -n1 | tr -s ' ')
3142         _flags='--gcc --abi=eabi -me'
3143         _cc_e='-ppl -fe=$@'
3144         _cc_o='-fe=$@'
3145         _depflags='-ppa -ppd=$(@:.o=.d)'
3146         _cflags_speed='-O3 -mf=5'
3147         _cflags_size='-O3 -mf=2'
3148         _flags_filter=tms470_flags
3149     elif $_cc -v 2>&1 | grep -q clang; then
3150         _type=clang
3151         _ident=$($_cc --version 2>/dev/null | head -n1)
3152         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3153         _cflags_speed='-O3'
3154         _cflags_size='-Os'
3155     elif $_cc -V 2>&1 | grep -q Sun; then
3156         _type=suncc
3157         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3158         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3159         _DEPFLAGS='-xM1 -xc99'
3160         _ldflags='-std=c99'
3161         _cflags_speed='-O5'
3162         _cflags_size='-O5 -xspace'
3163         _flags_filter=suncc_flags
3164     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3165         _type=pathscale
3166         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3167         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3168         _cflags_speed='-O2'
3169         _cflags_size='-Os'
3170         _flags_filter='filter_out -Wdisabled-optimization'
3171     elif $_cc -v 2>&1 | grep -q Open64; then
3172         _type=open64
3173         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3174         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3175         _cflags_speed='-O2'
3176         _cflags_size='-Os'
3177         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3178     elif $_cc -V 2>&1 | grep -q Portland; then
3179         _type=pgi
3180         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3181         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3182         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3183         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3184         _cflags_noopt="-O1"
3185         _flags_filter=pgi_flags
3186     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3187         _type=armasm
3188         _ident=$($_cc | head -n1)
3189         # 4509: "This form of conditional instruction is deprecated"
3190         _flags="-nologo -ignore 4509"
3191         _flags_filter=armasm_flags
3192     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3193         _type=msvc
3194         _ident=$($_cc 2>&1 | head -n1)
3195         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3196         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3197         _cflags_speed="-O2"
3198         _cflags_size="-O1"
3199         if $_cc -nologo- 2>&1 | grep -q Linker; then
3200             _ld_o='-out:$@'
3201         else
3202             _ld_o='-Fe$@'
3203         fi
3204         _cc_o='-Fo$@'
3205         _cc_e='-P -Fi$@'
3206         _flags_filter=msvc_flags
3207         _ld_lib='lib%.a'
3208         _ld_path='-libpath:'
3209         _flags='-nologo'
3210         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS'
3211     elif $_cc 2>&1 | grep -q Intel; then
3212         _type=icl
3213         _ident=$($_cc 2>&1 | head -n1)
3214         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3215         # Not only is O3 broken on 13.x+ but it is slower on all previous
3216         # versions (tested) as well.
3217         _cflags_speed="-O2"
3218         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3219         if $_cc 2>&1 | grep -q Linker; then
3220             _ld_o='-out:$@'
3221         else
3222             _ld_o='-Fe$@'
3223         fi
3224         _cc_o='-Fo$@'
3225         _cc_e='-P'
3226         _flags_filter=icl_flags
3227         _ld_lib='lib%.a'
3228         _ld_path='-libpath:'
3229         # -Qdiag-error to make icl error when seeing certain unknown arguments
3230         _flags='-nologo -Qdiag-error:4044,10157'
3231         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3232         # with MSVC which enables it by default.
3233         _cflags='-D_USE_MATH_DEFINES -Qms0 -Qvec- -Qsimd- -GS'
3234     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3235         _type=cparser
3236         _ident=$($_cc --version | head -n1)
3237         _depflags='-MMD'
3238         _cflags_speed='-O4'
3239         _cflags_size='-O2'
3240         _flags_filter=cparser_flags
3241     fi
3242
3243     eval ${pfx}_type=\$_type
3244     eval ${pfx}_ident=\$_ident
3245 }
3246
3247 set_ccvars(){
3248     eval ${1}_C=\${_cc_c-\${${1}_C}}
3249     eval ${1}_E=\${_cc_e-\${${1}_E}}
3250     eval ${1}_O=\${_cc_o-\${${1}_O}}
3251
3252     if [ -n "$_depflags" ]; then
3253         eval ${1}_DEPFLAGS=\$_depflags
3254     else
3255         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3256         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3257         eval DEP${1}FLAGS=\$_flags
3258     fi
3259 }
3260
3261 probe_cc cc "$cc"
3262 cflags_filter=$_flags_filter
3263 cflags_speed=$_cflags_speed
3264 cflags_size=$_cflags_size
3265 cflags_noopt=$_cflags_noopt
3266 add_cflags $_flags $_cflags
3267 cc_ldflags=$_ldflags
3268 set_ccvars CC
3269
3270 probe_cc hostcc "$host_cc"
3271 host_cflags_filter=$_flags_filter
3272 add_host_cflags  $_flags $_cflags
3273 set_ccvars HOSTCC
3274
3275 test -n "$cc_type" && enable $cc_type ||
3276     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3277
3278 : ${as_default:=$cc}
3279 : ${objcc_default:=$cc}
3280 : ${dep_cc_default:=$cc}
3281 : ${ld_default:=$cc}
3282 : ${host_ld_default:=$host_cc}
3283 set_default ar as objcc dep_cc ld host_ld
3284
3285 probe_cc as "$as"
3286 asflags_filter=$_flags_filter
3287 add_asflags $_flags $_cflags
3288 set_ccvars AS
3289
3290 probe_cc objcc "$objcc"
3291 objcflags_filter=$_flags_filter
3292 add_objcflags $_flags $_cflags
3293 set_ccvars OBJC
3294
3295 probe_cc ld "$ld"
3296 ldflags_filter=$_flags_filter
3297 add_ldflags $_flags $_ldflags
3298 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3299 LD_O=${_ld_o-$LD_O}
3300 LD_LIB=${_ld_lib-$LD_LIB}
3301 LD_PATH=${_ld_path-$LD_PATH}
3302
3303 probe_cc hostld "$host_ld"
3304 host_ldflags_filter=$_flags_filter
3305 add_host_ldflags $_flags $_ldflags
3306 HOSTLD_O=${_ld_o-$HOSTLD_O}
3307
3308 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3309     probe_cc depcc "$dep_cc"
3310     CCDEP=${_DEPCMD:-$DEPCMD}
3311     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3312     DEPCCFLAGS=$_flags
3313 fi
3314
3315 if $ar 2>&1 | grep -q Microsoft; then
3316     arflags="-nologo"
3317     ar_o='-out:$@'
3318 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3319     arflags="rq"
3320     ar_o='$@'
3321 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3322     arflags='-Xany -r -c'
3323     ar_o='$@'
3324 else
3325     arflags="rc"
3326     ar_o='$@'
3327 fi
3328
3329 add_cflags $extra_cflags
3330 add_objcflags $extra_objcflags
3331 add_asflags $extra_cflags
3332
3333 if test -n "$sysroot"; then
3334     case "$cc_type" in
3335         gcc|llvm_gcc|clang)
3336             add_cppflags --sysroot="$sysroot"
3337             add_ldflags --sysroot="$sysroot"
3338         ;;
3339         tms470)
3340             add_cppflags -I"$sysinclude"
3341             add_ldflags  --sysroot="$sysroot"
3342         ;;
3343     esac
3344 fi
3345
3346 if test "$cpu" = host; then
3347     enabled cross_compile &&
3348         die "--cpu=host makes no sense when cross-compiling."
3349
3350     case "$cc_type" in
3351         gcc|llvm_gcc)
3352             check_native(){
3353                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3354                 sed -n "/cc1.*$1=/{
3355                             s/.*$1=\\([^ ]*\\).*/\\1/
3356                             p
3357                             q
3358                         }" $TMPE
3359             }
3360             cpu=$(check_native -march || check_native -mcpu)
3361         ;;
3362     esac
3363
3364     test "${cpu:-host}" = host &&
3365         die "--cpu=host not supported with compiler $cc"
3366 fi
3367
3368 # Deal with common $arch aliases
3369 case "$arch" in
3370     aarch64|arm64)
3371         arch="aarch64"
3372     ;;
3373     arm*)
3374         arch="arm"
3375     ;;
3376     mips*|IP*)
3377         case "$arch" in
3378         *el)
3379             add_cppflags -EL
3380             add_ldflags -EL
3381         ;;
3382         *eb)
3383             add_cppflags -EB
3384             add_ldflags -EB
3385         ;;
3386         esac
3387         arch="mips"
3388     ;;
3389     parisc*|hppa*)
3390         arch="parisc"
3391     ;;
3392     "Power Macintosh"|ppc*|powerpc*)
3393         arch="ppc"
3394     ;;
3395     s390|s390x)
3396         arch="s390"
3397     ;;
3398     sh4|sh)
3399         arch="sh4"
3400     ;;
3401     sun4u|sparc*)
3402         arch="sparc"
3403     ;;
3404     tilegx|tile-gx)
3405         arch="tilegx"
3406     ;;
3407     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3408         arch="x86"
3409     ;;
3410 esac
3411
3412 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3413 enable $arch
3414
3415 # Add processor-specific flags
3416 if enabled aarch64; then
3417
3418     case $cpu in
3419         armv*)
3420             cpuflags="-march=$cpu"
3421         ;;
3422         *)
3423             cpuflags="-mcpu=$cpu"
3424         ;;
3425     esac
3426
3427 elif enabled alpha; then
3428
3429     cpuflags="-mcpu=$cpu"
3430
3431 elif enabled arm; then
3432
3433     check_arm_arch() {
3434         check_cpp_condition stddef.h \
3435             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3436             $cpuflags
3437     }
3438
3439     probe_arm_arch() {
3440         if   check_arm_arch 4;        then echo armv4;
3441         elif check_arm_arch 4T;       then echo armv4t;
3442         elif check_arm_arch 5;        then echo armv5;
3443         elif check_arm_arch 5E;       then echo armv5e;
3444         elif check_arm_arch 5T;       then echo armv5t;
3445         elif check_arm_arch 5TE;      then echo armv5te;
3446         elif check_arm_arch 5TEJ;     then echo armv5te;
3447         elif check_arm_arch 6;        then echo armv6;
3448         elif check_arm_arch 6J;       then echo armv6j;
3449         elif check_arm_arch 6K;       then echo armv6k;
3450         elif check_arm_arch 6Z;       then echo armv6z;
3451         elif check_arm_arch 6ZK;      then echo armv6zk;
3452         elif check_arm_arch 6T2;      then echo armv6t2;
3453         elif check_arm_arch 7;        then echo armv7;
3454         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3455         elif check_arm_arch 7S;       then echo armv7-a;
3456         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3457         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3458         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3459         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3460         fi
3461     }
3462
3463     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3464
3465     case $cpu in
3466         armv*)
3467             cpuflags="-march=$cpu"
3468             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3469         ;;
3470         *)
3471             cpuflags="-mcpu=$cpu"
3472             case $cpu in
3473                 cortex-a*)                               subarch=armv7a  ;;
3474                 cortex-r*)                               subarch=armv7r  ;;
3475                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3476                 arm11*)                                  subarch=armv6   ;;
3477                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3478                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3479                 *)                             subarch=$(probe_arm_arch) ;;
3480             esac
3481         ;;
3482     esac
3483
3484     case "$subarch" in
3485         armv5t*)    enable fast_clz                ;;
3486         armv[6-8]*) enable fast_clz fast_unaligned ;;
3487     esac
3488
3489 elif enabled avr32; then
3490
3491     case $cpu in
3492         ap7[02]0[0-2])
3493             subarch="avr32_ap"
3494             cpuflags="-mpart=$cpu"
3495         ;;
3496         ap)
3497             subarch="avr32_ap"
3498             cpuflags="-march=$cpu"
3499         ;;
3500         uc3[ab]*)
3501             subarch="avr32_uc"
3502             cpuflags="-mcpu=$cpu"
3503         ;;
3504         uc)
3505             subarch="avr32_uc"
3506             cpuflags="-march=$cpu"
3507         ;;
3508     esac
3509
3510 elif enabled bfin; then
3511
3512     cpuflags="-mcpu=$cpu"
3513
3514 elif enabled mips; then
3515
3516     cpuflags="-march=$cpu"
3517
3518 elif enabled ppc; then
3519
3520     disable ldbrx
3521
3522     case $(tolower $cpu) in
3523         601|ppc601|powerpc601)
3524             cpuflags="-mcpu=601"
3525             disable altivec
3526         ;;
3527         603*|ppc603*|powerpc603*)
3528             cpuflags="-mcpu=603"
3529             disable altivec
3530         ;;
3531         604*|ppc604*|powerpc604*)
3532             cpuflags="-mcpu=604"
3533             disable altivec
3534         ;;
3535         g3|75*|ppc75*|powerpc75*)
3536             cpuflags="-mcpu=750"
3537             disable altivec
3538         ;;
3539         g4|745*|ppc745*|powerpc745*)
3540             cpuflags="-mcpu=7450"
3541             disable vsx
3542         ;;
3543         74*|ppc74*|powerpc74*)
3544             cpuflags="-mcpu=7400"
3545             disable vsx
3546         ;;
3547         g5|970|ppc970|powerpc970)
3548             cpuflags="-mcpu=970"
3549             disable vsx
3550         ;;
3551         power[3-6]*)
3552             cpuflags="-mcpu=$cpu"
3553             disable vsx
3554         ;;
3555         power[7-8]*)
3556             cpuflags="-mcpu=$cpu"
3557             enable ldbrx
3558         ;;
3559         cell)
3560             cpuflags="-mcpu=cell"
3561             enable ldbrx
3562             disable vsx
3563         ;;
3564         e500mc)
3565             cpuflags="-mcpu=e500mc"
3566             disable altivec
3567         ;;
3568         e500v2)
3569             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3570             disable altivec
3571             disable dcbzl
3572         ;;
3573         e500)
3574             cpuflags="-mcpu=8540 -mhard-float"
3575             disable altivec
3576             disable dcbzl
3577         ;;
3578     esac
3579
3580 elif enabled sparc; then
3581
3582     case $cpu in
3583         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3584             cpuflags="-mcpu=$cpu"
3585         ;;
3586         ultrasparc*|niagara[234])
3587             cpuflags="-mcpu=$cpu"
3588         ;;
3589     esac
3590
3591 elif enabled x86; then
3592
3593     case $cpu in
3594         i[345]86|pentium)
3595             cpuflags="-march=$cpu"
3596             disable i686
3597             disable mmx
3598         ;;
3599         # targets that do NOT support nopl and conditional mov (cmov)
3600         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3601             cpuflags="-march=$cpu"
3602             disable i686
3603         ;;
3604         # targets that do support nopl and conditional mov (cmov)
3605         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3606             cpuflags="-march=$cpu"
3607             enable i686
3608             enable fast_cmov
3609         ;;
3610         # targets that do support conditional mov but on which it's slow
3611         pentium4|pentium4m|prescott|nocona)
3612             cpuflags="-march=$cpu"
3613             enable i686
3614             disable fast_cmov
3615         ;;
3616     esac
3617
3618 fi
3619
3620 if [ "$cpu" != generic ]; then
3621     add_cflags  $cpuflags
3622     add_asflags $cpuflags
3623     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3624 fi
3625
3626 # compiler sanity check
3627 check_exec <<EOF
3628 int main(void){ return 0; }
3629 EOF
3630 if test "$?" != 0; then
3631     echo "$cc is unable to create an executable file."
3632     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3633         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3634         echo "Only do this if you know what cross compiling means."
3635     fi
3636     die "C compiler test failed."
3637 fi
3638
3639 add_cppflags -D_ISOC99_SOURCE
3640 check_cflags -std=c99
3641 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3642 #include <stdlib.h>
3643 EOF
3644 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3645 #include <stdlib.h>
3646 EOF
3647
3648 add_host_cppflags -D_ISOC99_SOURCE
3649 check_host_cflags -std=c99
3650 check_host_cflags -Wall
3651 check_host_cflags -O3
3652
3653 check_64bit(){
3654     arch32=$1
3655     arch64=$2
3656     expr=$3
3657     check_code cc "" "int test[2*($expr) - 1]" &&
3658         subarch=$arch64 || subarch=$arch32
3659 }
3660
3661 case "$arch" in
3662     aarch64|alpha|ia64)
3663         spic=$shared
3664     ;;
3665     mips)
3666         check_64bit mips mips64 '_MIPS_SIM > 1'
3667         spic=$shared
3668     ;;
3669     parisc)
3670         check_64bit parisc parisc64 'sizeof(void *) > 4'
3671         spic=$shared
3672     ;;
3673     ppc)
3674         check_64bit ppc ppc64 'sizeof(void *) > 4'
3675         spic=$shared
3676     ;;
3677     s390)
3678         check_64bit s390 s390x 'sizeof(void *) > 4'
3679         spic=$shared
3680     ;;
3681     sparc)
3682         check_64bit sparc sparc64 'sizeof(void *) > 4'
3683         spic=$shared
3684     ;;
3685     x86)
3686         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3687         if test "$subarch" = "x86_64"; then
3688             spic=$shared
3689         fi
3690     ;;
3691 esac
3692
3693 enable $subarch
3694 enabled spic && enable_weak pic
3695
3696 # OS specific
3697 case $target_os in
3698     aix)
3699         SHFLAGS=-shared
3700         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3701         enabled shared && add_ldflags -Wl,-brtl
3702         ;;
3703     android)
3704         disable symver
3705         enable section_data_rel_ro
3706         SLIB_INSTALL_NAME='$(SLIBNAME)'
3707         SLIB_INSTALL_LINKS=
3708         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3709         ;;
3710     haiku)
3711         prefix_default="/boot/common"
3712         network_extralibs="-lnetwork"
3713         host_libs=
3714         ;;
3715     sunos)
3716         SHFLAGS='-shared -Wl,-h,$$(@F)'
3717         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3718         network_extralibs="-lsocket -lnsl"
3719         # When using suncc to build, the Solaris linker will mark
3720         # an executable with each instruction set encountered by
3721         # the Solaris assembler.  As our libraries contain their own
3722         # guards for processor-specific code, instead suppress
3723         # generation of the HWCAPS ELF section on Solaris x86 only.
3724         enabled_all suncc x86 &&
3725             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3726             add_ldflags -Wl,-M,mapfile
3727         nm_default='nm -P -g'
3728         SLIB_CREATE_DEF_CMD='$(Q)perl $(SRC_PATH)/compat/solaris/make_sunver.pl $$(filter %.ver,$$^) $(OBJS) | grep -v @ > $(SUBDIR)lib$(NAME).ver-sol2'
3729         ;;
3730     netbsd)
3731         disable symver
3732         oss_indev_extralibs="-lossaudio"
3733         oss_outdev_extralibs="-lossaudio"
3734         ;;
3735     openbsd|bitrig)
3736         disable symver
3737         SHFLAGS='-shared'
3738         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3739         SLIB_INSTALL_LINKS=
3740         oss_indev_extralibs="-lossaudio"
3741         oss_outdev_extralibs="-lossaudio"
3742         ;;
3743     dragonfly)
3744         disable symver
3745         ;;
3746     freebsd)
3747         ;;
3748     bsd/os)
3749         add_extralibs -lpoll -lgnugetopt
3750         ;;
3751     darwin)
3752         enabled ppc && add_asflags -force_cpusubtype_ALL
3753         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3754         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3755         add_ldflags -Wl,-dynamic,-search_paths_first
3756         SLIBSUF=".dylib"
3757         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3758         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3759         objformat="macho"
3760         enabled x86_64 && objformat="macho64"
3761         enabled_any pic shared ||
3762             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3763         ;;
3764     msys*)
3765         die "Native MSYS builds are discouraged, please use the MINGW environment.";
3766         ;;
3767     mingw32*|mingw64*)
3768         if test $target_os = "mingw32ce"; then
3769             disable network
3770         else
3771             target_os=mingw32
3772         fi
3773         LIBTARGET=i386
3774         if enabled x86_64; then
3775             LIBTARGET="i386:x86-64"
3776         elif enabled arm; then
3777             LIBTARGET=arm-wince
3778         fi
3779         check_ldflags -Wl,--nxcompat
3780         check_ldflags -Wl,--dynamicbase
3781         shlibdir_default="$bindir_default"
3782         SLIBPREF=""
3783         SLIBSUF=".dll"
3784         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3785         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3786         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3787         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3788         SLIB_INSTALL_LINKS=
3789         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3790         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3791         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3792         objformat="win32"
3793         dlltool="${cross_prefix}dlltool"
3794         ranlib=:
3795         enable dos_paths
3796         ;;
3797     win32|win64)
3798         disable symver
3799         if enabled shared; then
3800             # Link to the import library instead of the normal static library
3801             # for shared libs.
3802             LD_LIB='%.lib'
3803             # Cannot build both shared and static libs with MSVC or icl.
3804             disable static
3805         fi
3806         shlibdir_default="$bindir_default"
3807         SLIBPREF=""
3808         SLIBSUF=".dll"
3809         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3810         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3811         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3812         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3813         SLIB_INSTALL_LINKS=
3814         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3815         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3816         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3817         objformat="win32"
3818         ranlib=:
3819         enable dos_paths
3820         ;;
3821     cygwin*)
3822         target_os=cygwin
3823         shlibdir_default="$bindir_default"
3824         SLIBPREF="cyg"
3825         SLIBSUF=".dll"
3826         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3827         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3828         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3829         SLIB_INSTALL_LINKS=
3830         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3831         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3832         objformat="win32"
3833         enable dos_paths
3834         ;;
3835     *-dos|freedos|opendos)
3836         network_extralibs="-lsocket"
3837         objformat="coff"
3838         enable dos_paths
3839         add_cppflags -U__STRICT_ANSI__
3840         ;;
3841     linux)
3842         enable dv1394
3843         enable section_data_rel_ro
3844         ;;
3845     irix*)
3846         target_os=irix
3847         ranlib="echo ignoring ranlib"
3848         ;;
3849     os/2*)
3850         ln_s="cp -f"
3851         objformat="aout"
3852         add_cppflags -D_GNU_SOURCE
3853         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3854         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3855         LIBSUF="_s.a"
3856         SLIBPREF=""
3857         SLIBSUF=".dll"
3858         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3859         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3860         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3861             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3862             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3863             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3864             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3865         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3866             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3867         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3868         enable dos_paths
3869         ;;
3870     gnu/kfreebsd)
3871         add_cppflags -D_BSD_SOURCE
3872         ;;
3873     gnu)
3874         ;;
3875     qnx)
3876         add_cppflags -D_QNX_SOURCE
3877         network_extralibs="-lsocket"
3878         ;;
3879     symbian)
3880         SLIBSUF=".dll"
3881         enable dos_paths
3882         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3883         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3884         add_ldflags -Wl,--target1-abs,--no-undefined \
3885                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3886                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3887         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3888                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3889                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3890         ;;
3891     osf1)
3892         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3893         ;;
3894     minix)
3895         ;;
3896     plan9)
3897         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3898                      -D_REENTRANT_SOURCE        \
3899                      -D_RESEARCH_SOURCE         \
3900                      -DFD_SETSIZE=96            \
3901                      -DHAVE_SOCK_OPTS
3902         add_compat strtod.o strtod=avpriv_strtod
3903         network_extralibs='-lbsd'
3904         exeobjs=compat/plan9/main.o
3905         cp_f='cp'
3906         ;;
3907     none)
3908         ;;
3909     *)
3910         die "Unknown OS '$target_os'."
3911         ;;
3912 esac
3913
3914 # determine libc flavour
3915
3916 probe_libc(){
3917     pfx=$1
3918     pfx_no_=${pfx%_}
3919     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3920     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3921         eval ${pfx}libc_type=uclibc
3922         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3923     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3924         eval ${pfx}libc_type=glibc
3925         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3926     # MinGW headers can be installed on Cygwin, so check for newlib first.
3927     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3928         eval ${pfx}libc_type=newlib
3929         add_${pfx}cppflags -U__STRICT_ANSI__
3930     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3931     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3932         eval ${pfx}libc_type=mingw64
3933         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3934         eval test \$${pfx_no_}cc_type = "gcc" &&
3935             add_${pfx}cppflags -D__printf__=__gnu_printf__
3936     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3937          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3938         eval ${pfx}libc_type=mingw32
3939         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3940             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3941             die "ERROR: MinGW32 runtime version must be >= 3.15."
3942         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3943         eval test \$${pfx_no_}cc_type = "gcc" &&
3944             add_${pfx}cppflags -D__printf__=__gnu_printf__
3945     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3946         eval ${pfx}libc_type=msvcrt
3947         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
3948             if [ "$pfx" = host_ ]; then
3949                 add_host_cppflags -Dsnprintf=_snprintf
3950             else
3951                 add_compat strtod.o strtod=avpriv_strtod
3952                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3953                                              _snprintf=avpriv_snprintf  \
3954                                              vsnprintf=avpriv_vsnprintf
3955             fi
3956         fi
3957         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3958         # 0x601 by default unless something else is set by the user.
3959         # This can easily lead to us detecting functions only present
3960         # in such new versions and producing binaries requiring windows 7.0.
3961         # Therefore explicitly set the default to XP unless the user has
3962         # set something else on the command line.
3963         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
3964         # family. For these cases, configure is free to use any functions
3965         # found in the SDK headers by default. (Alternatively, we could force
3966         # _WIN32_WINNT to 0x0602 in that case.)
3967         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
3968             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
3969 #ifdef WINAPI_FAMILY
3970 #include <winapifamily.h>
3971 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
3972 #error not desktop
3973 #endif
3974 #endif
3975 EOF
3976     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
3977         eval ${pfx}libc_type=klibc
3978     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
3979         eval ${pfx}libc_type=bionic
3980     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
3981         eval ${pfx}libc_type=solaris
3982         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
3983     else
3984         eval ${pfx}libc_type=default
3985         add_${pfx}cppflags -D_DEFAULT_SOURCE
3986     fi
3987 }
3988
3989 probe_libc
3990 test -n "$libc_type" && enable libc_$libc_type
3991 probe_libc host_
3992 test -n "$host_libc_type" && enable host_libc_$host_libc_type
3993
3994 case $libc_type in
3995     bionic)
3996         add_compat strtod.o strtod=avpriv_strtod
3997         ;;
3998 esac
3999
4000 # hacks for compiler/libc/os combinations
4001
4002 if enabled_all tms470 libc_glibc; then
4003     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4004     add_cppflags -D__USER_LABEL_PREFIX__=
4005     add_cppflags -D__builtin_memset=memset
4006     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4007     add_cflags   -pds=48    # incompatible redefinition of macro
4008 fi
4009
4010 if enabled_all ccc libc_glibc; then
4011     add_ldflags -Wl,-z,now  # calls to libots crash without this
4012 fi
4013
4014 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4015     add_cppflags '-I\$(SRC_PATH)/compat/float'
4016
4017 esc(){
4018     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4019 }
4020
4021 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
4022
4023 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4024
4025 set_default $PATHS_LIST
4026 set_default nm
4027
4028 # we need to build at least one lib type
4029 if ! enabled_any static shared; then
4030     cat <<EOF
4031 At least one library type must be built.
4032 Specify --enable-static to build the static libraries or --enable-shared to
4033 build the shared libraries as well. To only build the shared libraries specify
4034 --disable-static in addition to --enable-shared.
4035 EOF
4036     exit 1;
4037 fi
4038
4039 die_license_disabled() {
4040     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
4041 }
4042
4043 die_license_disabled gpl libcdio
4044 die_license_disabled gpl libx264
4045 die_license_disabled gpl libx265
4046 die_license_disabled gpl libxavs
4047 die_license_disabled gpl libxvid
4048 die_license_disabled gpl x11grab
4049
4050 die_license_disabled nonfree cuda
4051 die_license_disabled nonfree libfaac
4052 die_license_disabled nonfree libfdk_aac
4053 die_license_disabled nonfree nvenc
4054 die_license_disabled nonfree openssl
4055
4056 die_license_disabled version3 libopencore_amrnb
4057 die_license_disabled version3 libopencore_amrwb
4058 die_license_disabled version3 libvo_aacenc
4059 die_license_disabled version3 libvo_amrwbenc
4060
4061 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
4062
4063 disabled optimizations || check_cflags -fomit-frame-pointer
4064
4065 enable_weak_pic() {
4066     disabled pic && return
4067     enable pic
4068     add_cppflags -DPIC
4069     case "$target_os" in
4070     mingw*|cygwin*)
4071         ;;
4072     *)
4073         add_cflags -fPIC
4074         ;;
4075     esac
4076     add_asflags  -fPIC
4077 }
4078
4079 enabled pic && enable_weak_pic
4080
4081 check_cc <<EOF || die "Symbol mangling check failed."
4082 int ff_extern;
4083 EOF
4084 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4085 extern_prefix=${sym%%ff_extern*}
4086
4087 check_cc <<EOF && enable_weak inline_asm
4088 void foo(void) { __asm__ volatile ("" ::); }
4089 EOF
4090
4091 _restrict=
4092 for restrict_keyword in restrict __restrict__ __restrict; do
4093     check_cc <<EOF && _restrict=$restrict_keyword && break
4094 void foo(char * $restrict_keyword p);
4095 EOF
4096 done
4097
4098 check_cc <<EOF && enable pragma_deprecated
4099 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4100 EOF
4101
4102 check_cc <<EOF && enable attribute_packed
4103 struct { int x; } __attribute__((packed)) x;
4104 EOF
4105
4106 check_cc <<EOF && enable attribute_may_alias
4107 union { int x; } __attribute__((may_alias)) x;
4108 EOF
4109
4110 check_cc <<EOF || die "endian test failed"
4111 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4112 EOF
4113 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4114
4115 check_gas() {
4116     log "check_gas using '$as' as AS"
4117     # :vararg is used on aarch64, arm and ppc altivec
4118     check_as <<EOF || return 1
4119 .macro m n, y:vararg=0
4120 \n: .int \y
4121 .endm
4122 m x
4123 EOF
4124     # .altmacro is only used in arm asm
4125     ! enabled arm || check_as <<EOF || return 1
4126 .altmacro
4127 EOF
4128     enable gnu_as
4129     return 0
4130 }
4131
4132 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4133     nogas=:
4134     enabled_any arm aarch64 && nogas=die
4135     enabled_all ppc altivec && nogas=warn
4136     as_noop=-v
4137
4138     case $as_type in
4139         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4140         gcc)  gaspp_as_type=gas ;;
4141         *)    gaspp_as_type=$as_type ;;
4142     esac
4143
4144     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4145
4146     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4147         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4148
4149     if ! check_gas ; then
4150         as=${gas:=$as}
4151         check_gas || \
4152             $nogas "GNU assembler not found, install/update gas-preprocessor"
4153     fi
4154
4155     check_as <<EOF && enable as_func
4156 .func test
4157 .endfunc
4158 EOF
4159 fi
4160
4161 check_inline_asm inline_asm_labels '"1:\n"'
4162
4163 if enabled aarch64; then
4164     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4165     # internal assembler in clang 3.3 does not support this instruction
4166     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4167     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4168
4169     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4170
4171 elif enabled alpha; then
4172
4173     check_cflags -mieee
4174
4175 elif enabled arm; then
4176
4177     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4178     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4179     enabled thumb && check_cflags -mthumb || check_cflags -marm
4180
4181     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4182         enable vfp_args
4183     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4184         enable vfp_args
4185     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4186         case "${cross_prefix:-$cc}" in
4187             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4188             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4189 __asm__ (".eabi_attribute 28, 1");
4190 int main(void) { return 0; }
4191 EOF
4192         esac
4193         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4194     fi
4195
4196     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4197     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4198     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4199     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4200     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4201     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4202
4203     [ $target_os = linux ] || [ $target_os = android ] ||
4204         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4205             $ARCH_EXT_LIST_ARM
4206
4207     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4208
4209     check_as <<EOF && enable as_dn_directive
4210 ra .dn d0.i16
4211 .unreq ra
4212 EOF
4213
4214     # llvm's integrated assembler supports .object_arch from llvm 3.5
4215     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4216 .object_arch armv4
4217 EOF
4218
4219     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4220
4221 elif enabled mips; then
4222
4223     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4224
4225     # make sure that only an instruction set is enabled
4226     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4227
4228     if enabled mips64; then
4229         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4230             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4231                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4232     else
4233         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4234             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4235                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4236     fi
4237
4238 elif enabled parisc; then
4239
4240     if enabled gcc; then
4241         case $($cc -dumpversion) in
4242             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4243         esac
4244     fi
4245
4246 elif enabled ppc; then
4247
4248     enable local_aligned_8 local_aligned_16
4249
4250     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4251     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4252     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4253     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4254
4255     # AltiVec flags: The FSF version of GCC differs from the Apple version
4256     if enabled altivec; then
4257         check_cflags -maltivec -mabi=altivec &&
4258         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4259         check_cflags -faltivec
4260
4261         # check if our compiler supports Motorola AltiVec C API
4262         check_cc <<EOF || disable altivec
4263 $inc_altivec_h
4264 int main(void) {
4265     vector signed int v1 = (vector signed int) { 0 };
4266     vector signed int v2 = (vector signed int) { 1 };
4267     v1 = vec_add(v1, v2);
4268     return 0;
4269 }
4270 EOF
4271
4272         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4273     fi
4274
4275     if enabled vsx; then
4276         check_cflags -mvsx &&
4277         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4278     fi
4279
4280     if enabled power8; then
4281         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4282     fi
4283
4284 elif enabled x86; then
4285
4286     check_builtin rdtsc    intrin.h   "__rdtsc()"
4287     check_builtin mm_empty mmintrin.h "_mm_empty()"
4288
4289     enable local_aligned_8 local_aligned_16
4290
4291     # check whether EBP is available on x86
4292     # As 'i' is stored on the stack, this program will crash
4293     # if the base pointer is used to access it because the
4294     # base pointer is cleared in the inline assembly code.
4295     check_exec_crash <<EOF && enable ebp_available
4296 volatile int i=0;
4297 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4298 return i;
4299 EOF
4300
4301     # check whether EBX is available on x86
4302     check_inline_asm ebx_available '""::"b"(0)' &&
4303         check_inline_asm ebx_available '"":::"%ebx"'
4304
4305     # check whether xmm clobbers are supported
4306     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4307
4308     # check whether binutils is new enough to compile SSSE3/MMXEXT
4309     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4310     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4311
4312     if ! disabled_any asm mmx yasm; then
4313         if check_cmd $yasmexe --version; then
4314             enabled x86_64 && yasm_extra="-m amd64"
4315             yasm_debug="-g dwarf2"
4316         elif check_cmd nasm -v; then
4317             yasmexe=nasm
4318             yasm_debug="-g -F dwarf"
4319             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4320         fi
4321
4322         YASMFLAGS="-f $objformat $yasm_extra"
4323         enabled pic               && append YASMFLAGS "-DPIC"
4324         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4325         case "$objformat" in
4326             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4327         esac
4328
4329         check_yasm "movbe ecx, [5]" && enable yasm ||
4330             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4331         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4332         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4333         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4334         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4335         check_yasm "CPU amdnop" || disable cpunop
4336     fi
4337
4338     case "$cpu" in
4339         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4340             disable fast_clz
4341         ;;
4342     esac
4343
4344 fi
4345
4346 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4347
4348 check_ldflags -Wl,--as-needed
4349
4350 if check_func dlopen; then
4351     ldl=
4352 elif check_func dlopen -ldl; then
4353     ldl=-ldl
4354 fi
4355
4356 if ! disabled network; then
4357     check_func getaddrinfo $network_extralibs
4358     check_func inet_aton $network_extralibs
4359
4360     check_type netdb.h "struct addrinfo"
4361     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4362     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4363     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4364     check_type poll.h "struct pollfd"
4365     check_type netinet/sctp.h "struct sctp_event_subscribe"
4366     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4367     check_type netinet/in.h "struct sockaddr_in6"
4368     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4369     check_type "sys/types.h sys/socket.h" socklen_t
4370
4371     # Prefer arpa/inet.h over winsock2
4372     if check_header arpa/inet.h ; then
4373         check_func closesocket
4374     elif check_header winsock2.h ; then
4375         check_func_headers winsock2.h closesocket -lws2 &&
4376             network_extralibs="-lws2" ||
4377         { check_func_headers winsock2.h closesocket -lws2_32 &&
4378             network_extralibs="-lws2_32"; } || disable winsock2_h network
4379         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4380
4381         check_type ws2tcpip.h socklen_t
4382         check_type ws2tcpip.h "struct addrinfo"
4383         check_type ws2tcpip.h "struct group_source_req"
4384         check_type ws2tcpip.h "struct ip_mreq_source"
4385         check_type ws2tcpip.h "struct ipv6_mreq"
4386         check_type winsock2.h "struct pollfd"
4387         check_struct winsock2.h "struct sockaddr" sa_len
4388         check_type ws2tcpip.h "struct sockaddr_in6"
4389         check_type ws2tcpip.h "struct sockaddr_storage"
4390     else
4391         disable network
4392     fi
4393 fi
4394
4395 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4396 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4397 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4398 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4399
4400 case "$custom_allocator" in
4401     jemalloc)
4402         # jemalloc by default does not use a prefix
4403         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4404     ;;
4405     tcmalloc)
4406         require_pkg_config libtcmalloc gperftools/tcmalloc.h tc_malloc
4407         malloc_prefix=tc_
4408     ;;
4409 esac
4410
4411 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4412 check_func  ${malloc_prefix}memalign            && enable memalign
4413 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4414
4415 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4416     check_func_headers time.h clock_gettime || { check_func_headers time.h clock_gettime -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
4417
4418 check_func  fcntl
4419 check_func  fork
4420 check_func  gethrtime
4421 check_func  getopt
4422 check_func  getrusage
4423 check_func  gettimeofday
4424 check_func  gmtime_r
4425 check_func  isatty
4426 check_func  localtime_r
4427 check_func  mach_absolute_time
4428 check_func  mkstemp
4429 check_func  mmap
4430 check_func  mprotect
4431 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4432 check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt; }
4433 check_func  sched_getaffinity
4434 check_func  setrlimit
4435 check_func  strerror_r
4436 check_func  sysconf
4437 check_func  sysctl
4438 check_func  usleep
4439
4440 check_func_headers io.h setmode
4441 check_func_headers stdlib.h getenv
4442
4443 check_func_headers windows.h CoTaskMemFree -lole32
4444 check_func_headers windows.h GetProcessAffinityMask
4445 check_func_headers windows.h GetProcessTimes
4446 check_func_headers windows.h GetSystemTimeAsFileTime
4447 check_func_headers windows.h LoadLibrary
4448 check_func_headers windows.h MapViewOfFile
4449 check_func_headers windows.h SetConsoleTextAttribute
4450 check_func_headers windows.h Sleep
4451 check_func_headers windows.h VirtualAlloc
4452 check_struct windows.h "CONDITION_VARIABLE" Ptr
4453
4454 check_header direct.h
4455 check_header dlfcn.h
4456 check_header d3d11.h
4457 check_header dxva.h
4458 check_header dxva2api.h
4459 check_header io.h
4460 check_header mach/mach_time.h
4461 check_header malloc.h
4462 check_header poll.h
4463 check_header sys/mman.h
4464 check_header sys/param.h
4465 check_header sys/resource.h
4466 check_header sys/select.h
4467 check_header sys/time.h
4468 check_header sys/un.h
4469 check_header unistd.h
4470 check_header valgrind/valgrind.h
4471 check_header vdpau/vdpau.h
4472 check_header vdpau/vdpau_x11.h
4473 check_header VideoDecodeAcceleration/VDADecoder.h
4474 check_header windows.h
4475 check_header X11/extensions/XvMClib.h
4476
4477 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
4478 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
4479 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
4480
4481 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4482
4483 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4484 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4485 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4486
4487 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4488
4489 if ! disabled w32threads && ! enabled pthreads; then
4490     check_func_headers "windows.h process.h" _beginthreadex &&
4491         enable w32threads || disable w32threads
4492 fi
4493
4494 # check for some common methods of building with pthread support
4495 # do this before the optional library checks as some of them require pthreads
4496 if ! disabled pthreads && ! enabled w32threads; then
4497     enable pthreads
4498     if check_func pthread_join -pthread; then
4499         add_cflags -pthread
4500         add_extralibs -pthread
4501     elif check_func pthread_join -pthreads; then
4502         add_cflags -pthreads
4503         add_extralibs -pthreads
4504     elif check_func pthread_join -lpthreadGC2; then
4505         add_extralibs -lpthreadGC2
4506     elif check_lib pthread.h pthread_join -lpthread; then
4507         :
4508     elif ! check_func pthread_join; then
4509         disable pthreads
4510     fi
4511 fi
4512
4513 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
4514 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4515
4516 check_lib math.h sin -lm && LIBM="-lm"
4517 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4518
4519 atan2f_args=2
4520 ldexpf_args=2
4521 powf_args=2
4522
4523 for func in $MATH_FUNCS; do
4524     eval check_mathfunc $func \${${func}_args:-1}
4525 done
4526
4527 # these are off by default, so fail if requested and not available
4528 enabled avisynth          && { check_lib2 "avisynth/avisynth_c.h windows.h" LoadLibrary ||
4529                                check_lib2 "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl   ||
4530                                die "ERROR: LoadLibrary/dlopen not found, or avisynth header not found"; }
4531 enabled cuda              && check_lib cuda.h cuInit -lcuda
4532 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4533 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4534 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4535 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4536 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4537 enabled libfdk_aac        && require_pkg_config fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4538 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4539 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4540 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4541                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4542                                done || die "ERROR: libgsm not found"; }
4543 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4544 enabled libkvazaar        && require_pkg_config "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4545 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
4546 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4547 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4548 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4549 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4550 enabled libopenh264       && require_pkg_config openh264 wels/codec_api.h WelsGetCodecVersion
4551 enabled libopenjpeg       && { { check_header openjpeg.h && check_lib2 openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC; } ||
4552                                { require_pkg_config libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; } }
4553 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4554 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4555 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4556 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4557 enabled libsnappy         && require snappy snappy-c.h snappy_compress -lsnappy
4558 enabled libspeex          && require_pkg_config speex speex/speex.h speex_decoder_init -lspeex
4559 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4560 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4561 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4562 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4563 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4564 enabled libvpx            && require_pkg_config "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4565     enabled libvpx_vp8_decoder && {
4566         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4567             disable libvpx_vp8_decoder;
4568     }
4569     enabled libvpx_vp8_encoder && {
4570         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4571             disable libvpx_vp8_encoder;
4572     }
4573     enabled libvpx_vp9_decoder && {
4574         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4575             disable libvpx_vp9_decoder;
4576     }
4577     enabled libvpx_vp9_encoder && {
4578         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4579             disable libvpx_vp9_encoder;
4580     }
4581     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4582         die "libvpx enabled but no supported decoders found"
4583     fi
4584 }
4585 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4586 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4587 enabled libx264           && require_pkg_config x264 "stdint.h x264.h" x264_encoder_encode &&
4588                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4589                                die "ERROR: libx264 version must be >= 0.118."; } &&
4590                              { check_cpp_condition x264.h "X264_MPEG2" &&
4591                                enable libx262; }
4592 enabled libx265           && require_pkg_config x265 x265.h x265_api_get &&
4593                              { check_cpp_condition x265.h "X265_BUILD >= 57" ||
4594                                die "ERROR: libx265 version must be >= 57."; }
4595 enabled libxavs           && require libxavs xavs.h xavs_encoder_encode -lxavs
4596 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4597 enabled mmal              && { check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4598                                 { ! enabled cross_compile && {
4599                                     add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline ;
4600                                     add_extralibs -L/opt/vc/lib/ -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ;
4601                                     check_lib interface/mmal/mmal.h mmal_port_connect ; }
4602                                 check_lib interface/mmal/mmal.h mmal_port_connect ; } ||
4603                                die "ERROR: mmal not found"; }
4604 enabled openssl           && { check_pkg_config openssl openssl/ssl.h SSL_library_init && {
4605                                add_cflags $openssl_cflags && add_extralibs $openssl_libs; }||
4606                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4607                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4608                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4609                                die "ERROR: openssl not found"; }
4610
4611 if enabled gnutls; then
4612     { check_lib2 gmp.h mpz_export -lgmp && enable gmp; } ||
4613     { check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }
4614 fi
4615
4616 # libdc1394 check
4617 if enabled libdc1394; then
4618     { require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new &&
4619         enable libdc1394_2; } ||
4620     { check_lib libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394 &&
4621         enable libdc1394_1; } ||
4622     die "ERROR: No version of libdc1394 found "
4623 fi
4624
4625 if enabled nvenc; then
4626     enabled cuda || check_header cuda.h || die "ERROR: cuda.h not found.";
4627     check_header nvEncodeAPI.h || die "ERROR: nvEncodeAPI.h not found.";
4628     check_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 5" ||
4629         die "ERROR: NVENC API version 4 or older is not supported";
4630 fi
4631
4632 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4633     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4634     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4635     enable sdl
4636 fi
4637
4638 pod2man --help     > /dev/null 2>&1 && enable pod2man   || disable pod2man
4639 texi2html -version > /dev/null 2>&1 && enable texi2html || disable texi2html
4640
4641 check_header linux/fb.h
4642 check_header linux/videodev2.h
4643 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4644
4645 check_header AVFoundation/AVFoundation.h &&
4646     check_objcflags -fobjc-arc &&
4647     add_extralibs -framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia ||
4648     disable AVFoundation_AVFoundation_h
4649
4650 check_header sys/videoio.h
4651
4652 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
4653 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4654 # w32api 3.12 had it defined wrong
4655 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4656
4657 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4658 { check_header dev/bktr/ioctl_meteor.h &&
4659   check_header dev/bktr/ioctl_bt848.h; } ||
4660 { check_header machine/ioctl_meteor.h &&
4661   check_header machine/ioctl_bt848.h; } ||
4662 { check_header dev/video/meteor/ioctl_meteor.h &&
4663   check_header dev/video/bktr/ioctl_bt848.h; } ||
4664 check_header dev/ic/bt8xx.h
4665
4666 check_header sndio.h
4667 check_header sys/soundcard.h
4668 check_header soundcard.h
4669
4670 enabled_any alsa_indev alsa_outdev &&
4671     check_lib2 alsa/asoundlib.h snd_pcm_htimestamp -lasound
4672
4673 enabled jack_indev && check_lib2 jack/jack.h jack_client_open -ljack &&
4674     check_func jack_port_get_latency_range -ljack
4675
4676 enabled_any sndio_indev sndio_outdev && check_lib2 sndio.h sio_open -lsndio
4677
4678 if enabled libcdio; then
4679     check_lib2 "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4680     check_lib2 "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4681     die "ERROR: No usable libcdio/cdparanoia found"
4682 fi
4683
4684 check_lib X11/Xlib.h XOpenDisplay -lX11 && enable xlib
4685
4686 if enabled libxcb || enabled x11grab && ! disabled libxcb; then
4687     check_pkg_config xcb-shape xcb/shape.h xcb_shape_rectangles || {
4688         enabled libxcb && die "ERROR: libxcb not found";
4689     } && disable x11grab && enable libxcb
4690
4691     disabled libxcb_shm ||
4692         check_pkg_config xcb-shm xcb/shm.h xcb_shm_attach || {
4693             enabled libxcb_shm && die "ERROR: libxcb_shm not found";
4694         } && check_header sys/shm.h && enable libxcb_shm
4695
4696     disabled libxcb_xfixes ||
4697         check_pkg_config xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image || {
4698             enabled libxcb_xfixes && die "ERROR: libxcb_xfixes not found";
4699         } && enable libxcb_xfixes
4700
4701     add_cflags "$xcb_event_cflags $xcb_shm_cflags $xcb_xfixes_cflags"
4702     add_extralibs "$xcb_event_libs $xcb_shm_libs $xcb_xfixes_libs"
4703 fi
4704
4705 if enabled x11grab; then
4706     enabled xlib || die "ERROR: Xlib not found"
4707     require Xext X11/extensions/XShm.h XShmCreateImage -lXext
4708     require Xfixes X11/extensions/Xfixes.h XFixesGetCursorImage -lXfixes
4709 fi
4710
4711 enabled vaapi && enabled xlib &&
4712     check_lib2 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 &&
4713     enable vaapi_x11
4714
4715 enabled vdpau &&
4716     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4717     disable vdpau
4718
4719 enabled vdpau && enabled xlib &&
4720     check_func_headers "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau &&
4721     prepend avconv_libs $($ldflags_filter "-lvdpau") &&
4722     enable vdpau_x11
4723
4724 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4725
4726 # add some useful compiler flags if supported
4727 check_cflags -Wdeclaration-after-statement
4728 check_cflags -Wall
4729 check_cflags -Wdisabled-optimization
4730 check_cflags -Wpointer-arith
4731 check_cflags -Wredundant-decls
4732 check_cflags -Wwrite-strings
4733 check_cflags -Wtype-limits
4734 check_cflags -Wundef
4735 check_cflags -Wmissing-prototypes
4736 check_cflags -Wstrict-prototypes
4737 enabled extra_warnings && check_cflags -Winline
4738 enabled extra_warnings && check_cflags -Wcast-qual
4739
4740 check_disable_warning(){
4741     warning_flag=-W${1#-Wno-}
4742     test_cflags $warning_flag && add_cflags $1
4743 }
4744
4745 check_disable_warning -Wno-parentheses
4746 check_disable_warning -Wno-switch
4747 check_disable_warning -Wno-format-zero-length
4748 check_disable_warning -Wno-pointer-sign
4749
4750 # add some linker flags
4751 check_ldflags -Wl,--warn-common
4752 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4753 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir
4754 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
4755
4756 # add some strip flags
4757 # -wN '..@*' is more selective than -x, but not available everywhere.
4758 check_stripflags -wN \'..@*\' || check_stripflags -x || strip='true'
4759
4760 enabled neon_clobber_test &&
4761     check_ldflags -Wl,--wrap,avcodec_open2              \
4762                   -Wl,--wrap,avcodec_decode_audio4      \
4763                   -Wl,--wrap,avcodec_decode_video2      \
4764                   -Wl,--wrap,avcodec_decode_subtitle2   \
4765                   -Wl,--wrap,avcodec_encode_audio2      \
4766                   -Wl,--wrap,avcodec_encode_video2      \
4767                   -Wl,--wrap,avcodec_encode_subtitle    \
4768                   -Wl,--wrap,avresample_convert ||
4769     disable neon_clobber_test
4770
4771 enabled xmm_clobber_test &&
4772     check_ldflags -Wl,--wrap,avcodec_open2              \
4773                   -Wl,--wrap,avcodec_decode_audio4      \
4774                   -Wl,--wrap,avcodec_decode_video2      \
4775                   -Wl,--wrap,avcodec_decode_subtitle2   \
4776                   -Wl,--wrap,avcodec_encode_audio2      \
4777                   -Wl,--wrap,avcodec_encode_video2      \
4778                   -Wl,--wrap,avcodec_encode_subtitle    \
4779                   -Wl,--wrap,avresample_convert         \
4780                   -Wl,--wrap,sws_scale ||
4781     disable xmm_clobber_test
4782
4783 echo "X { local: *; };" > $TMPV
4784 if test_ldflags -Wl,--version-script,$TMPV; then
4785     append SHFLAGS '-Wl,--version-script,\$(SUBDIR)lib\$(NAME).ver'
4786 elif test_ldflags -Wl,-M,$TMPV; then
4787     append SHFLAGS '-Wl,-M,\$(SUBDIR)lib\$(NAME).ver-sol2'
4788 fi
4789
4790 check_cc <<EOF && enable symver_asm_label
4791 void ff_foo(void) __asm__ ("av_foo@VERSION");
4792 void ff_foo(void) { ${inline_asm+__asm__($quotes);} }
4793 EOF
4794     check_cc <<EOF && enable symver_gnu_asm
4795 __asm__(".symver ff_foo,av_foo@VERSION");
4796 void ff_foo(void) {}
4797 EOF
4798
4799 if [ -z "$optflags" ]; then
4800     if enabled small; then
4801         optflags=$cflags_size
4802     elif enabled optimizations; then
4803         optflags=$cflags_speed
4804     else
4805         optflags=$cflags_noopt
4806     fi
4807 fi
4808
4809 check_optflags(){
4810     check_cflags "$@"
4811     enabled lto && check_ldflags "$@"
4812 }
4813
4814
4815 if enabled lto; then
4816     test "$cc_type" != "$ld_type" && die "LTO requires same compiler and linker"
4817     check_cflags  -flto
4818     check_ldflags -flto $cpuflags
4819 fi
4820
4821 check_optflags $optflags
4822 check_optflags -fno-math-errno
4823 check_optflags -fno-signed-zeros
4824
4825 if enabled icc; then
4826     # Just warnings, no remarks
4827     check_cflags -w1
4828     # -wd: Disable following warnings
4829     # 144, 167, 556: -Wno-pointer-sign
4830     # 1292: attribute "foo" ignored
4831     # 1419: external declaration in primary source file
4832     # 10006: ignoring unknown option -fno-signed-zeros
4833     # 10148: ignoring unknown option -Wno-parentheses
4834     # 10156: ignoring option '-W'; no argument required
4835     check_cflags -wd144,167,556,1292,1419,10006,10148,10156
4836     # 11030: Warning unknown option --as-needed