msvc: Fix libx264 linking
[ffmpeg.git] / configure
1 #!/bin/sh
2 #
3 # Libav configure script
4 #
5 # Copyright (c) 2000-2002 Fabrice Bellard
6 # Copyright (c) 2005-2008 Diego Biurrun
7 # Copyright (c) 2005-2008 Mans Rullgard
8 #
9
10 # Prevent locale nonsense from breaking basic text processing.
11 LC_ALL=C
12 export LC_ALL
13
14 # make sure we are running under a compatible shell
15 # try to make this part work with most shells
16
17 try_exec(){
18     echo "Trying shell $1"
19     type "$1" > /dev/null 2>&1 && exec "$@"
20 }
21
22 unset foo
23 (: ${foo%%bar}) 2> /dev/null
24 E1="$?"
25
26 (: ${foo?}) 2> /dev/null
27 E2="$?"
28
29 if test "$E1" != 0 || test "$E2" = 0; then
30     echo "Broken shell detected.  Trying alternatives."
31     export FF_CONF_EXEC
32     if test "0$FF_CONF_EXEC" -lt 1; then
33         FF_CONF_EXEC=1
34         try_exec bash "$0" "$@"
35     fi
36     if test "0$FF_CONF_EXEC" -lt 2; then
37         FF_CONF_EXEC=2
38         try_exec ksh "$0" "$@"
39     fi
40     if test "0$FF_CONF_EXEC" -lt 3; then
41         FF_CONF_EXEC=3
42         try_exec /usr/xpg4/bin/sh "$0" "$@"
43     fi
44     echo "No compatible shell script interpreter found."
45     echo "This configure script requires a POSIX-compatible shell"
46     echo "such as bash or ksh."
47     echo "THIS IS NOT A BUG IN LIBAV, DO NOT REPORT IT AS SUCH."
48     echo "Instead, install a working POSIX-compatible shell."
49     echo "Disabling this configure test will create a broken Libav."
50     if test "$BASH_VERSION" = '2.04.0(1)-release'; then
51         echo "This bash version ($BASH_VERSION) is broken on your platform."
52         echo "Upgrade to a later version if available."
53     fi
54     exit 1
55 fi
56
57 test -d /usr/xpg4/bin && PATH=/usr/xpg4/bin:$PATH
58
59 show_help(){
60     cat <<EOF
61 Usage: configure [options]
62 Options: [defaults in brackets after descriptions]
63
64 Help options:
65   --help                   print this message
66   --list-decoders          show all available decoders
67   --list-encoders          show all available encoders
68   --list-hwaccels          show all available hardware accelerators
69   --list-demuxers          show all available demuxers
70   --list-muxers            show all available muxers
71   --list-parsers           show all available parsers
72   --list-protocols         show all available protocols
73   --list-bsfs              show all available bitstream filters
74   --list-indevs            show all available input devices
75   --list-outdevs           show all available output devices
76   --list-filters           show all available filters
77
78 Standard options:
79   --logfile=FILE           log tests and output to FILE [config.log]
80   --disable-logging        do not log configure debug information
81   --prefix=PREFIX          install in PREFIX [$prefix]
82   --bindir=DIR             install binaries in DIR [PREFIX/bin]
83   --datadir=DIR            install data files in DIR [PREFIX/share/avconv]
84   --docdir=DIR             install documentation in DIR [PREFIX/share/doc/libav]
85   --libdir=DIR             install libs in DIR [PREFIX/lib]
86   --shlibdir=DIR           install shared libs in DIR [PREFIX/lib]
87   --incdir=DIR             install includes in DIR [PREFIX/include]
88   --mandir=DIR             install man page in DIR [PREFIX/share/man]
89   --enable-rpath           use rpath when linking programs [USE WITH CARE]
90
91 Licensing options:
92   --enable-gpl             allow use of GPL code, the resulting libs
93                            and binaries will be under GPL [no]
94   --enable-version3        upgrade (L)GPL to version 3 [no]
95   --enable-nonfree         allow use of nonfree code, the resulting libs
96                            and binaries will be unredistributable [no]
97
98 Configuration options:
99   --disable-static         do not build static libraries [no]
100   --enable-shared          build shared libraries [no]
101   --enable-small           optimize for size instead of speed
102   --enable-runtime-cpudetect detect cpu capabilities at runtime (bigger binary)
103   --enable-gray            enable full grayscale support (slower color)
104   --disable-swscale-alpha  disable alpha channel support in swscale
105   --disable-all            disable building components, libraries and programs
106
107 Program options:
108   --disable-programs       do not build command line programs
109   --disable-avconv         disable avconv build
110   --disable-avplay         disable avplay build
111   --disable-avprobe        disable avprobe build
112   --disable-avserver       deprecated, does nothing
113
114 Component options:
115   --disable-doc            do not build documentation
116   --disable-avdevice       disable libavdevice build
117   --disable-avcodec        disable libavcodec build
118   --disable-avformat       disable libavformat build
119   --disable-avutil         disable libavutil build
120   --disable-swscale        disable libswscale build
121   --disable-avfilter       disable video filter support [no]
122   --disable-avresample     disable libavresample build [no]
123   --disable-pthreads       disable pthreads [auto]
124   --disable-w32threads     disable Win32 threads [auto]
125   --disable-network        disable network support [no]
126   --disable-dct            disable DCT code
127   --disable-error-resilience disable error resilience code
128   --disable-lsp            disable LSP code
129   --disable-lzo            disable LZO decoder code
130   --disable-mdct           disable MDCT code
131   --disable-rdft           disable RDFT code
132   --disable-fft            disable FFT code
133   --disable-faan           disable floating point AAN (I)DCT code
134
135 Hardware accelerators:
136   --enable-d3d11va         enable D3D11VA code
137   --enable-dxva2           enable DXVA2 code
138   --enable-vaapi           enable VAAPI code
139   --enable-vda             enable VDA code
140   --enable-vdpau           enable VDPAU code
141
142 Individual component options:
143   --disable-everything     disable all components listed below
144   --disable-encoder=NAME   disable encoder NAME
145   --enable-encoder=NAME    enable encoder NAME
146   --disable-encoders       disable all encoders
147   --disable-decoder=NAME   disable decoder NAME
148   --enable-decoder=NAME    enable decoder NAME
149   --disable-decoders       disable all decoders
150   --disable-hwaccel=NAME   disable hwaccel NAME
151   --enable-hwaccel=NAME    enable hwaccel NAME
152   --disable-hwaccels       disable all hwaccels
153   --disable-muxer=NAME     disable muxer NAME
154   --enable-muxer=NAME      enable muxer NAME
155   --disable-muxers         disable all muxers
156   --disable-demuxer=NAME   disable demuxer NAME
157   --enable-demuxer=NAME    enable demuxer NAME
158   --disable-demuxers       disable all demuxers
159   --enable-parser=NAME     enable parser NAME
160   --disable-parser=NAME    disable parser NAME
161   --disable-parsers        disable all parsers
162   --enable-bsf=NAME        enable bitstream filter NAME
163   --disable-bsf=NAME       disable bitstream filter NAME
164   --disable-bsfs           disable all bitstream filters
165   --enable-protocol=NAME   enable protocol NAME
166   --disable-protocol=NAME  disable protocol NAME
167   --disable-protocols      disable all protocols
168   --enable-indev=NAME      enable input device NAME
169   --disable-indev=NAME     disable input device NAME
170   --disable-indevs         disable input devices
171   --enable-outdev=NAME     enable output device NAME
172   --disable-outdev=NAME    disable output device NAME
173   --disable-outdevs        disable output devices
174   --disable-devices        disable all devices
175   --enable-filter=NAME     enable filter NAME
176   --disable-filter=NAME    disable filter NAME
177   --disable-filters        disable all filters
178
179 External library support:
180   --enable-avisynth        enable reading of AviSynth script files [no]
181   --enable-bzlib           enable bzlib [autodetect]
182   --enable-frei0r          enable frei0r video filtering
183   --enable-gnutls          enable gnutls [no]
184   --enable-libbs2b         enable bs2b DSP library [no]
185   --enable-libcdio         enable audio CD grabbing with libcdio
186   --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394
187                            and libraw1394 [no]
188   --enable-libdcadec       enable DCA decoding via libdcadec [no]
189   --enable-libfaac         enable AAC encoding via libfaac [no]
190   --enable-libfdk-aac      enable AAC de/encoding via libfdk-aac [no]
191   --enable-libfreetype     enable libfreetype [no]
192   --enable-libgsm          enable GSM de/encoding via libgsm [no]
193   --enable-libilbc         enable iLBC de/encoding via libilbc [no]
194   --enable-libkvazaar      enable HEVC encoding via libkvazaar [no]
195   --enable-libmfx          enable HW acceleration through libmfx
196   --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
197   --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
198   --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
199   --enable-libopencv       enable video filtering via libopencv [no]
200   --enable-libopenh264     enable H.264 encoding via OpenH264 [no]
201   --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]
202   --enable-libopus         enable Opus de/encoding via libopus [no]
203   --enable-libpulse        enable Pulseaudio input via libpulse [no]
204   --enable-librtmp         enable RTMP[E] support via librtmp [no]
205   --enable-libschroedinger enable Dirac de/encoding via libschroedinger [no]
206   --enable-libsnappy       enable Snappy compression [no]
207   --enable-libspeex        enable Speex de/encoding via libspeex [no]
208   --enable-libtheora       enable Theora encoding via libtheora [no]
209   --enable-libtwolame      enable MP2 encoding via libtwolame [no]
210   --enable-libvo-aacenc    enable AAC encoding via libvo-aacenc [no]
211   --enable-libvo-amrwbenc  enable AMR-WB encoding via libvo-amrwbenc [no]
212   --enable-libvorbis       enable Vorbis encoding via libvorbis [no]
213   --enable-libvpx          enable VP8 and VP9 de/encoding via libvpx [no]
214   --enable-libwavpack      enable wavpack encoding via libwavpack [no]
215   --enable-libwebp         enable WebP encoding via libwebp [no]
216   --enable-libx264         enable H.264 encoding via x264 [no]
217   --enable-libx265         enable HEVC encoding via x265 [no]
218   --enable-libxavs         enable AVS encoding via xavs [no]
219   --enable-libxcb          enable X11 grabbing using XCB [no]
220   --enable-libxcb-shm      enable X11 grabbing shm communication [auto]
221   --enable-libxcb-xfixes   enable X11 grabbing mouse rendering [auto]
222   --enable-libxvid         enable Xvid encoding via xvidcore,
223                            native MPEG-4/Xvid encoder exists [no]
224   --enable-mmal            enable decoding via MMAL [no]
225   --enable-nvenc           enable encoding via NVENC [no]
226   --enable-openssl         enable openssl [no]
227   --enable-x11grab         enable X11 grabbing (legacy) [no]
228   --enable-zlib            enable zlib [autodetect]
229
230 Toolchain options:
231   --arch=ARCH              select architecture [$arch]
232   --cpu=CPU                select the minimum required CPU (affects
233                            instruction selection, may crash on older CPUs)
234   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
235   --enable-cross-compile   assume a cross-compiler is used
236   --sysroot=PATH           root of cross-build tree
237   --sysinclude=PATH        location of cross-build system headers
238   --target-os=OS           compiler targets OS [$target_os]
239   --target-exec=CMD        command to run executables on target
240   --target-path=DIR        path to view of build directory on target
241   --target-samples=DIR     path to samples directory on target
242   --toolchain=NAME         set tool defaults according to NAME
243   --nm=NM                  use nm tool
244   --ar=AR                  use archive tool AR [$ar_default]
245   --as=AS                  use assembler AS [$as_default]
246   --cc=CC                  use C compiler CC [$cc_default]
247   --objcc=OCC              use ObjC compiler OCC [$cc_default]
248   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
249   --ld=LD                  use linker LD
250   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
251   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
252   --host-cc=HOSTCC         use host C compiler HOSTCC
253   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
254   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
255   --host-ld=HOSTLD         use host linker HOSTLD
256   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
257   --host-libs=HLIBS        use libs HLIBS when linking for host
258   --host-os=OS             compiler host OS [$target_os]
259   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
260   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
261   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
262   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
263   --extra-libs=ELIBS       add ELIBS [$ELIBS]
264   --extra-version=STRING   version string suffix []
265   --optflags=OPTFLAGS      override optimization-related compiler flags
266   --build-suffix=SUFFIX    library name suffix []
267   --enable-pic             build position-independent code
268   --enable-thumb           compile for Thumb instruction set
269   --enable-lto             use link-time optimization
270   --env="ENV=override"     override the environment variables
271
272 Advanced options (experts only):
273   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
274   --custom-allocator=NAME  use a supported custom allocator
275   --disable-symver         disable symbol versioning
276   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
277   --disable-safe-bitstream-reader
278                            disable buffer boundary checking in bitreaders
279                            (faster, but may crash)
280   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
281   --enable-sram            allow use of on-chip SRAM
282
283 Optimization options (experts only):
284   --disable-asm            disable all assembly optimizations
285   --disable-altivec        disable AltiVec optimizations
286   --disable-vsx            disable VSX optimizations
287   --disable-power8         disable POWER8 optimizations
288   --disable-amd3dnow       disable 3DNow! optimizations
289   --disable-amd3dnowext    disable 3DNow! extended optimizations
290   --disable-mmx            disable MMX optimizations
291   --disable-mmxext         disable MMXEXT optimizations
292   --disable-sse            disable SSE optimizations
293   --disable-sse2           disable SSE2 optimizations
294   --disable-sse3           disable SSE3 optimizations
295   --disable-ssse3          disable SSSE3 optimizations
296   --disable-sse4           disable SSE4 optimizations
297   --disable-sse42          disable SSE4.2 optimizations
298   --disable-avx            disable AVX optimizations
299   --disable-xop            disable XOP optimizations
300   --disable-fma3           disable FMA3 optimizations
301   --disable-fma4           disable FMA4 optimizations
302   --disable-avx2           disable AVX2 optimizations
303   --disable-armv5te        disable armv5te optimizations
304   --disable-armv6          disable armv6 optimizations
305   --disable-armv6t2        disable armv6t2 optimizations
306   --disable-vfp            disable VFP optimizations
307   --disable-neon           disable NEON optimizations
308   --disable-inline-asm     disable use of inline assembly
309   --disable-yasm           disable use of nasm/yasm assembly
310
311 Developer options (useful when working on Libav itself):
312   --disable-debug          disable debugging symbols
313   --enable-debug=LEVEL     set the debug level [$debuglevel]
314   --disable-optimizations  disable compiler optimizations
315   --enable-extra-warnings  enable more compiler warnings
316   --samples=PATH           location of test samples for FATE, if not set use
317                            \$LIBAV_SAMPLES at make invocation time.
318   --enable-neon-clobber-test check NEON registers for clobbering (should be
319                            used only for debugging purposes)
320   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
321                            should be used only for debugging purposes)
322   --enable-random          randomly enable/disable components
323   --disable-random
324   --enable-random=LIST     randomly enable/disable specific components or
325   --disable-random=LIST    component groups. LIST is a comma-separated list
326                            of NAME[:PROB] entries where NAME is a component
327                            (group) and PROB the probability associated with
328                            NAME (default 0.5).
329   --random-seed=VALUE      seed value for --enable/disable-random
330   --disable-valgrind-backtrace do not print a backtrace under Valgrind
331                            (only applies to --disable-optimizations builds)
332
333 NOTE: Object files are built at the place where configure is launched.
334 EOF
335   exit 0
336 }
337
338 quotes='""'
339
340 log(){
341     echo "$@" >> $logfile
342 }
343
344 log_file(){
345     log BEGIN $1
346     i=1
347     while read line; do
348         printf '%5s   %s\n' "${i}" "${line}"
349         i=$(($i+1))
350     done < $1 >> $logfile
351     log END $1
352 }
353
354 echolog(){
355     log "$@"
356     echo "$@"
357 }
358
359 warn(){
360     log "WARNING: $*"
361     WARNINGS="${WARNINGS}WARNING: $*\n"
362 }
363
364 die(){
365     echolog "$@"
366     cat <<EOF
367
368 If you think configure made a mistake, make sure you are using the latest
369 version from Git.  If the latest version fails, report the problem to the
370 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
371 EOF
372     if disabled logging; then
373         cat <<EOF
374 Rerun configure with logging enabled (do not use --disable-logging), and
375 include the log this produces with your report.
376 EOF
377     else
378         cat <<EOF
379 Include the log file "$logfile" produced by configure as this will help
380 solving the problem.
381 EOF
382     fi
383     exit 1
384 }
385
386 # Avoid locale weirdness, besides we really just want to translate ASCII.
387 toupper(){
388     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
389 }
390
391 tolower(){
392     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
393 }
394
395 c_escape(){
396     echo "$*" | sed 's/["\\]/\\\0/g'
397 }
398
399 sh_quote(){
400     v=$(echo "$1" | sed "s/'/'\\\\''/g")
401     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
402     echo "$v"
403 }
404
405 cleanws(){
406     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
407 }
408
409 filter(){
410     pat=$1
411     shift
412     for v; do
413         eval "case $v in $pat) echo $v ;; esac"
414     done
415 }
416
417 filter_out(){
418     pat=$1
419     shift
420     for v; do
421         eval "case $v in $pat) ;; *) echo $v ;; esac"
422     done
423 }
424
425 map(){
426     m=$1
427     shift
428     for v; do eval $m; done
429 }
430
431 add_suffix(){
432     suffix=$1
433     shift
434     for v; do echo ${v}${suffix}; done
435 }
436
437 set_all(){
438     value=$1
439     shift
440     for var in $*; do
441         eval $var=$value
442     done
443 }
444
445 set_weak(){
446     value=$1
447     shift
448     for var; do
449         eval : \${$var:=$value}
450     done
451 }
452
453 sanitize_var_name(){
454     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
455 }
456
457 set_safe(){
458     var=$1
459     shift
460     eval $(sanitize_var_name "$var")='$*'
461 }
462
463 get_safe(){
464     eval echo \$$(sanitize_var_name "$1")
465 }
466
467 pushvar(){
468     for pvar in $*; do
469         eval level=\${${pvar}_level:=0}
470         eval ${pvar}_${level}="\$$pvar"
471         eval ${pvar}_level=$(($level+1))
472     done
473 }
474
475 popvar(){
476     for pvar in $*; do
477         eval level=\${${pvar}_level:-0}
478         test $level = 0 && continue
479         eval level=$(($level-1))
480         eval $pvar="\${${pvar}_${level}}"
481         eval ${pvar}_level=$level
482         eval unset ${pvar}_${level}
483     done
484 }
485
486 enable(){
487     set_all yes $*
488 }
489
490 check_requested() {
491     for var; do
492         eval test "x\$${var#!}_requested" = "xyes" &&  die "${var#*_} ${var/_*} cannot be enabled"
493     done
494 }
495
496 disable(){
497     set_all no $*
498     check_requested $*
499 }
500
501 enable_weak(){
502     set_weak yes $*
503 }
504
505 disable_weak(){
506     set_weak no $*
507 }
508
509 enable_safe(){
510     for var; do
511         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
512     done
513 }
514
515 disable_safe(){
516     for var; do
517         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
518     done
519 }
520
521 do_enable_deep(){
522     for var; do
523         enabled $var && continue
524         eval sel="\$${var}_select"
525         eval sgs="\$${var}_suggest"
526         pushvar var sgs
527         enable_deep $sel
528         popvar sgs
529         enable_deep_weak $sgs
530         popvar var
531     done
532 }
533
534 enable_deep(){
535     do_enable_deep $*
536     enable $*
537 }
538
539 enable_deep_weak(){
540     for var; do
541         disabled $var && continue
542         pushvar var
543         do_enable_deep $var
544         popvar var
545         enable_weak $var
546     done
547 }
548
549 do_enable_deep_force(){
550     for var; do
551         enabled $var && continue
552         eval sel="\$${var}_select\ \$${var}_suggest\ \$${var}_select_any"
553         pushvar var
554         enable_deep_force $sel
555         popvar var
556     done
557 }
558
559 enable_deep_force(){
560     do_enable_deep_force $*
561     enable $*
562 }
563
564 request(){
565     for var; do
566         enable ${var}_requested
567     done
568     enable_deep_force $*
569 }
570
571 enabled(){
572     test "${1#!}" = "$1" && op== || op=!=
573     eval test "x\$${1#!}" $op "xyes"
574 }
575
576 disabled(){
577     test "${1#!}" = "$1" && op== || op=!=
578     eval test "x\$${1#!}" $op "xno"
579 }
580
581 enabled_all(){
582     for opt; do
583         enabled $opt || return 1
584     done
585 }
586
587 disabled_all(){
588     for opt; do
589         disabled $opt || return 1
590     done
591 }
592
593 enabled_any(){
594     for opt; do
595         enabled $opt && return 0
596     done
597 }
598
599 disabled_any(){
600     for opt; do
601         disabled $opt && return 0
602     done
603     return 1
604 }
605
606 set_default(){
607     for opt; do
608         eval : \${$opt:=\$${opt}_default}
609     done
610 }
611
612 is_in(){
613     value=$1
614     shift
615     for var in $*; do
616         [ $var = $value ] && return 0
617     done
618     return 1
619 }
620
621 do_check_deps(){
622     for cfg; do
623         cfg="${cfg#!}"
624         enabled ${cfg}_checking && die "Circular dependency for $cfg."
625         disabled ${cfg}_checking && continue
626         enable ${cfg}_checking
627         append allopts $cfg
628
629         eval dep_all="\$${cfg}_deps"
630         eval dep_any="\$${cfg}_deps_any\ \$${cfg}_select_any"
631         eval dep_sel="\$${cfg}_select"
632         eval dep_sgs="\$${cfg}_suggest"
633         eval dep_ifa="\$${cfg}_if"
634         eval dep_ifn="\$${cfg}_if_any"
635
636         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
637         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
638         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
639
640         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
641         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
642         enabled_all  $dep_all || disable $cfg
643         enabled_any  $dep_any || disable $cfg
644         disabled_any $dep_sel && disable $cfg
645
646         if enabled $cfg; then
647             enable_deep $dep_sel
648             enable_deep_weak $dep_sgs
649         fi
650
651         disable ${cfg}_checking
652     done
653 }
654
655 check_deps(){
656     unset allopts
657
658     do_check_deps "$@"
659
660     for cfg in $allopts; do
661         enabled $cfg || continue
662         eval dep_extralibs="\$${cfg}_extralibs"
663         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
664     done
665 }
666
667 print_config(){
668     pfx=$1
669     files=$2
670     shift 2
671     map 'eval echo "$v \${$v:-no}"' "$@" |
672     awk "BEGIN { split(\"$files\", files) }
673         {
674             c = \"$pfx\" toupper(\$1);
675             v = \$2;
676             sub(/yes/, 1, v);
677             sub(/no/,  0, v);
678             for (f in files) {
679                 file = files[f];
680                 if (file ~ /\\.h\$/) {
681                     printf(\"#define %s %d\\n\", c, v) >>file;
682                 } else if (file ~ /\\.asm\$/) {
683                     printf(\"%%define %s %d\\n\", c, v) >>file;
684                 } else if (file ~ /\\.mak\$/) {
685                     n = -v ? \"\" : \"!\";
686                     printf(\"%s%s=yes\\n\", n, c) >>file;
687                 }
688             }
689         }"
690 }
691
692 print_enabled(){
693     suf=$1
694     shift
695     for v; do
696         enabled $v && printf "%s\n" ${v%$suf};
697     done
698 }
699
700 append(){
701     var=$1
702     shift
703     eval "$var=\"\$$var $*\""
704 }
705
706 prepend(){
707     var=$1
708     shift
709     eval "$var=\"$* \$$var\""
710 }
711
712 unique(){
713     var=$1
714     uniq_list=""
715     for tok in $(eval echo \$$var); do
716         uniq_list="$(filter_out $tok $uniq_list) $tok"
717     done
718     eval "$var=\"${uniq_list}\""
719 }
720
721 add_cppflags(){
722     append CPPFLAGS "$@"
723 }
724
725 add_cflags(){
726     append CFLAGS $($cflags_filter "$@")
727 }
728
729 add_asflags(){
730     append ASFLAGS $($asflags_filter "$@")
731 }
732
733 add_objcflags(){
734     append OBJCFLAGS $($objcflags_filter "$@")
735 }
736
737 add_ldflags(){
738     append LDFLAGS $($ldflags_filter "$@")
739 }
740
741 add_ldexeflags(){
742     append LDEXEFLAGS $($ldflags_filter "$@")
743 }
744
745 add_stripflags(){
746     append STRIPFLAGS "$@"
747 }
748
749 add_extralibs(){
750     prepend extralibs $($ldflags_filter "$@")
751 }
752
753 add_host_cppflags(){
754     append host_cppflags "$@"
755 }
756
757 add_host_cflags(){
758     append host_cflags $($host_cflags_filter "$@")
759 }
760
761 add_host_ldflags(){
762     append host_ldflags $($host_ldflags_filter "$@")
763 }
764
765 add_compat(){
766     append compat_objs $1
767     shift
768     map 'add_cppflags -D$v' "$@"
769 }
770
771 check_cmd(){
772     log "$@"
773     "$@" >> $logfile 2>&1
774 }
775
776 cc_o(){
777     eval printf '%s\\n' $CC_O
778 }
779
780 cc_e(){
781     eval printf '%s\\n' $CC_E
782 }
783
784 check_cc(){
785     log check_cc "$@"
786     cat > $TMPC
787     log_file $TMPC
788     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
789 }
790
791 check_objcc(){
792     log check_objcc "$@"
793     cat > $TMPC
794     log_file $TMPC
795     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
796 }
797
798 check_cpp(){
799     log check_cpp "$@"
800     cat > $TMPC
801     log_file $TMPC
802     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
803 }
804
805 as_o(){
806     eval printf '%s\\n' $AS_O
807 }
808
809 check_as(){
810     log check_as "$@"
811     cat > $TMPS
812     log_file $TMPS
813     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
814 }
815
816 check_inline_asm(){
817     log check_inline_asm "$@"
818     name="$1"
819     code="$2"
820     shift 2
821     disable $name
822     check_cc "$@" <<EOF && enable $name
823 void foo(void){ __asm__ volatile($code); }
824 EOF
825 }
826
827 check_insn(){
828     log check_insn "$@"
829     check_inline_asm ${1}_inline "\"$2\""
830     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
831 }
832
833 check_yasm(){
834     log check_yasm "$@"
835     echo "$1" > $TMPS
836     log_file $TMPS
837     shift 1
838     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
839 }
840
841 ld_o(){
842     eval printf '%s\\n' $LD_O
843 }
844
845 check_ld(){
846     log check_ld "$@"
847     flags=$(filter_out '-l*' "$@")
848     libs=$(filter '-l*' "$@")
849     check_cc $($cflags_filter $flags) || return
850     flags=$($ldflags_filter $flags)
851     libs=$($ldflags_filter $libs)
852     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
853 }
854
855 print_include(){
856     hdr=$1
857     test "${hdr%.h}" = "${hdr}" &&
858         echo "#include $hdr"    ||
859         echo "#include <$hdr>"
860 }
861
862 check_code(){
863     log check_code "$@"
864     check=$1
865     headers=$2
866     code=$3
867     shift 3
868     {
869         for hdr in $headers; do
870             print_include $hdr
871         done
872         echo "int main(void) { $code; return 0; }"
873     } | check_$check "$@"
874 }
875
876 check_cppflags(){
877     log check_cppflags "$@"
878     check_cc "$@" <<EOF && append CPPFLAGS "$@"
879 int x;
880 EOF
881 }
882
883 test_cflags(){
884     log test_cflags "$@"
885     set -- $($cflags_filter "$@")
886     check_cc "$@" <<EOF
887 int x;
888 EOF
889 }
890
891 check_cflags(){
892     log check_cflags "$@"
893     test_cflags "$@" && add_cflags "$@"
894 }
895
896 test_objcflags(){
897     log test_cflags "$@"
898     set -- $($cflags_filter "$@")
899     check_objcc "$@" <<EOF
900 int x;
901 EOF
902 }
903
904 check_objcflags(){
905     log check_cflags "$@"
906     test_objcflags "$@" && add_objcflags "$@"
907 }
908
909 test_ldflags(){
910     log test_ldflags "$@"
911     check_ld "$@" <<EOF
912 int main(void){ return 0; }
913 EOF
914 }
915
916 check_ldflags(){
917     log check_ldflags "$@"
918     test_ldflags "$@" && add_ldflags "$@"
919 }
920
921 test_stripflags(){
922     log test_stripflags "$@"
923     # call check_cc to get a fresh TMPO
924     check_cc <<EOF
925 int main(void) { return 0; }
926 EOF
927     check_cmd $strip $STRIPFLAGS "$@" $TMPO
928 }
929
930 check_stripflags(){
931     log check_stripflags "$@"
932     test_stripflags "$@" && add_stripflags "$@"
933 }
934
935 check_header(){
936     log check_header "$@"
937     header=$1
938     shift
939     disable_safe $header
940     check_cpp "$@" <<EOF && enable_safe $header
941 #include <$header>
942 int x;
943 EOF
944 }
945
946 check_func(){
947     log check_func "$@"
948     func=$1
949     shift
950     disable $func
951     check_ld "$@" <<EOF && enable $func
952 extern int $func();
953 int main(void){ $func(); }
954 EOF
955 }
956
957 check_mathfunc(){
958     log check_mathfunc "$@"
959     func=$1
960     narg=$2
961     shift 2
962     test $narg = 2 && args="f, g" || args="f"
963     disable $func
964     check_ld "$@" <<EOF && enable $func
965 #include <math.h>
966 float foo(float f, float g) { return $func($args); }
967 int main(void){ return 0; }
968 EOF
969 }
970
971 check_func_headers(){
972     log check_func_headers "$@"
973     headers=$1
974     funcs=$2
975     shift 2
976     {
977         for hdr in $headers; do
978             print_include $hdr
979         done
980         for func in $funcs; do
981             echo "long check_$func(void) { return (long) $func; }"
982         done
983         echo "int main(void) { return 0; }"
984     } | check_ld "$@" && enable $funcs && enable_safe $headers
985 }
986
987 check_cpp_condition(){
988     log check_cpp_condition "$@"
989     header=$1
990     condition=$2
991     shift 2
992     check_cpp "$@" <<EOF
993 #include <$header>
994 #if !($condition)
995 #error "unsatisfied condition: $condition"
996 #endif
997 EOF
998 }
999
1000 check_lib(){
1001     log check_lib "$@"
1002     header="$1"
1003     func="$2"
1004     shift 2
1005     check_header $header && check_func $func "$@" && add_extralibs "$@"
1006 }
1007
1008 check_lib2(){
1009     log check_lib2 "$@"
1010     headers="$1"
1011     funcs="$2"
1012     shift 2
1013     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
1014 }
1015
1016 check_pkg_config(){
1017     log check_pkg_config "$@"
1018     pkg="$1"
1019     headers="$2"
1020     funcs="$3"
1021     shift 3
1022     check_cmd $pkg_config --exists --print-errors $pkg || return
1023     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1024     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1025     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1026         set_safe "${pkg}_cflags" $pkg_cflags   &&
1027         set_safe "${pkg}_libs"   $pkg_libs
1028 }
1029
1030 check_exec(){
1031     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1032 }
1033
1034 check_exec_crash(){
1035     code=$(cat)
1036
1037     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1038     # are safe but may not be available everywhere.  Thus we use
1039     # raise(SIGTERM) instead.  The check is run in a subshell so we
1040     # can redirect the "Terminated" message from the shell.  SIGBUS
1041     # is not defined by standard C so it is used conditionally.
1042
1043     (check_exec "$@") >> $logfile 2>&1 <<EOF
1044 #include <signal.h>
1045 static void sighandler(int sig){
1046     raise(SIGTERM);
1047 }
1048 int foo(void){
1049     $code
1050 }
1051 int (*func_ptr)(void) = foo;
1052 int main(void){
1053     signal(SIGILL, sighandler);
1054     signal(SIGFPE, sighandler);
1055     signal(SIGSEGV, sighandler);
1056 #ifdef SIGBUS
1057     signal(SIGBUS, sighandler);
1058 #endif
1059     return func_ptr();
1060 }
1061 EOF
1062 }
1063
1064 check_type(){
1065     log check_type "$@"
1066     headers=$1
1067     type=$2
1068     shift 2
1069     disable_safe "$type"
1070     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1071 }
1072
1073 check_struct(){
1074     log check_struct "$@"
1075     headers=$1
1076     struct=$2
1077     member=$3
1078     shift 3
1079     disable_safe "${struct}_${member}"
1080     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1081         enable_safe "${struct}_${member}"
1082 }
1083
1084 check_builtin(){
1085     log check_builtin "$@"
1086     name=$1
1087     headers=$2
1088     builtin=$3
1089     shift 3
1090     disable "$name"
1091     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1092 }
1093
1094 check_compile_assert(){
1095     log check_compile_assert "$@"
1096     name=$1
1097     headers=$2
1098     condition=$3
1099     shift 3
1100     disable "$name"
1101     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1102 }
1103
1104 require(){
1105     name="$1"
1106     header="$2"
1107     func="$3"
1108     shift 3
1109     check_lib $header $func "$@" || die "ERROR: $name not found"
1110 }
1111
1112 require2(){
1113     name="$1"
1114     headers="$2"
1115     func="$3"
1116     shift 3
1117     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1118 }
1119
1120 require_pkg_config(){
1121     pkg="$1"
1122     check_pkg_config "$@" || die "ERROR: $pkg not found"
1123     add_cflags    $(get_safe "${pkg}_cflags")
1124     add_extralibs $(get_safe "${pkg}_libs")
1125 }
1126
1127 hostcc_e(){
1128     eval printf '%s\\n' $HOSTCC_E
1129 }
1130
1131 hostcc_o(){
1132     eval printf '%s\\n' $HOSTCC_O
1133 }
1134
1135 check_host_cc(){
1136     log check_host_cc "$@"
1137     cat > $TMPC
1138     log_file $TMPC
1139     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1140 }
1141
1142 check_host_cpp(){
1143     log check_host_cpp "$@"
1144     cat > $TMPC
1145     log_file $TMPC
1146     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1147 }
1148
1149 check_host_cppflags(){
1150     log check_host_cppflags "$@"
1151     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1152 int x;
1153 EOF
1154 }
1155
1156 check_host_cflags(){
1157     log check_host_cflags "$@"
1158     set -- $($host_cflags_filter "$@")
1159     check_host_cc "$@" <<EOF && append host_cflags "$@"
1160 int x;
1161 EOF
1162 }
1163
1164 check_host_cpp_condition(){
1165     log check_host_cpp_condition "$@"
1166     header=$1
1167     condition=$2
1168     shift 2
1169     check_host_cpp "$@" <<EOF
1170 #include <$header>
1171 #if !($condition)
1172 #error "unsatisfied condition: $condition"
1173 #endif
1174 EOF
1175 }
1176
1177 apply(){
1178     file=$1
1179     shift
1180     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1181 }
1182
1183 cp_if_changed(){
1184     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1185     mkdir -p "$(dirname $2)"
1186     $cp_f "$1" "$2"
1187 }
1188
1189 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1190 # system-dependent things.
1191
1192 AVCODEC_COMPONENTS="
1193     bsfs
1194     decoders
1195     encoders
1196     hwaccels
1197     parsers
1198 "
1199
1200 AVDEVICE_COMPONENTS="
1201     indevs
1202     outdevs
1203 "
1204 AVFILTER_COMPONENTS="
1205     filters
1206 "
1207 AVFORMAT_COMPONENTS="
1208     demuxers
1209     muxers
1210     protocols
1211 "
1212
1213 AVRESAMPLE_COMPONENTS=""
1214 AVUTIL_COMPONENTS=""
1215
1216 COMPONENT_LIST="
1217     $AVCODEC_COMPONENTS
1218     $AVDEVICE_COMPONENTS
1219     $AVFILTER_COMPONENTS
1220     $AVFORMAT_COMPONENTS
1221     $AVRESAMPLE_COMPONENTS
1222     $AVUTIL_COMPONENTS
1223 "
1224
1225 EXAMPLE_LIST="
1226     avcodec_example
1227     filter_audio_example
1228     metadata_example
1229     output_example
1230     qsvdec_example
1231     transcode_aac_example
1232 "
1233
1234 EXTERNAL_LIBRARY_LIST="
1235     avisynth
1236     bzlib
1237     frei0r
1238     gnutls
1239     libbs2b
1240     libcdio
1241     libdc1394
1242     libdcadec
1243     libfaac
1244     libfdk_aac
1245     libfontconfig
1246     libfreetype
1247     libgsm
1248     libilbc
1249     libkvazaar
1250     libmfx
1251     libmp3lame
1252     libopencore_amrnb
1253     libopencore_amrwb
1254     libopencv
1255     libopenh264
1256     libopenjpeg
1257     libopus
1258     libpulse
1259     librtmp
1260     libschroedinger
1261     libsnappy
1262     libspeex
1263     libtheora
1264     libtwolame
1265     libvo_aacenc
1266     libvo_amrwbenc
1267     libvorbis
1268     libvpx
1269     libwavpack
1270     libwebp
1271     libx264
1272     libx265
1273     libxavs
1274     libxcb
1275     libxcb_shm
1276     libxcb_xfixes
1277     libxvid
1278     mmal
1279     nvenc
1280     openssl
1281     x11grab
1282     zlib
1283 "
1284
1285 FEATURE_LIST="
1286     gray
1287     hardcoded_tables
1288     runtime_cpudetect
1289     safe_bitstream_reader
1290     shared
1291     small
1292     sram
1293     static
1294     swscale_alpha
1295 "
1296
1297 HWACCEL_LIST="
1298     d3d11va
1299     dxva2
1300     vaapi
1301     vda
1302     vdpau
1303 "
1304
1305 LIBRARY_LIST="
1306     avcodec
1307     avdevice
1308     avfilter
1309     avformat
1310     avresample
1311     avutil
1312     swscale
1313 "
1314
1315 LICENSE_LIST="
1316     gpl
1317     nonfree
1318     version3
1319 "
1320
1321 PROGRAM_LIST="
1322     avconv
1323     avplay
1324     avprobe
1325 "
1326
1327 SUBSYSTEM_LIST="
1328     dct
1329     doc
1330     error_resilience
1331     faan
1332     fft
1333     lsp
1334     lzo
1335     mdct
1336     network
1337     rdft
1338 "
1339
1340 CONFIG_LIST="
1341     $COMPONENT_LIST
1342     $EXAMPLE_LIST
1343     $EXTERNAL_LIBRARY_LIST
1344     $FEATURE_LIST
1345     $HWACCEL_LIST
1346     $LICENSE_LIST
1347     $LIBRARY_LIST
1348     $PROGRAM_LIST
1349     $SUBSYSTEM_LIST
1350     memalign_hack
1351     neon_clobber_test
1352     pic
1353     pod2man
1354     texi2html
1355     thumb
1356     valgrind_backtrace
1357     xmm_clobber_test
1358 "
1359
1360 THREADS_LIST="
1361     pthreads
1362     w32threads
1363 "
1364
1365 ATOMICS_LIST="
1366     atomics_gcc
1367     atomics_suncc
1368     atomics_win32
1369 "
1370
1371 ARCH_LIST="
1372     aarch64
1373     alpha
1374     arm
1375     avr32
1376     avr32_ap
1377     avr32_uc
1378     bfin
1379     ia64
1380     m68k
1381     mips
1382     mips64
1383     parisc
1384     ppc
1385     ppc64
1386     s390
1387     sh4
1388     sparc
1389     sparc64
1390     tilegx
1391     tilepro
1392     tomi
1393     x86
1394     x86_32
1395     x86_64
1396 "
1397
1398 ARCH_EXT_LIST_ARM="
1399     armv5te
1400     armv6
1401     armv6t2
1402     armv8
1403     neon
1404     vfp
1405     vfpv3
1406 "
1407
1408 ARCH_EXT_LIST_X86_SIMD="
1409     amd3dnow
1410     amd3dnowext
1411     avx
1412     avx2
1413     fma3
1414     fma4
1415     mmx
1416     mmxext
1417     sse
1418     sse2
1419     sse3
1420     sse4
1421     sse42
1422     ssse3
1423     xop
1424 "
1425
1426 ARCH_EXT_LIST_PPC="
1427     altivec
1428     dcbzl
1429     ldbrx
1430     power8
1431     ppc4xx
1432     vsx
1433 "
1434
1435 ARCH_EXT_LIST_X86="
1436     $ARCH_EXT_LIST_X86_SIMD
1437     cpunop
1438     i686
1439 "
1440
1441 ARCH_EXT_LIST_MIPS="
1442     loongson
1443     mips32r1
1444     mips64r1
1445     mips32r2
1446     mips64r2
1447     mips32r6
1448     mips64r6
1449 "
1450
1451 ARCH_EXT_LIST="
1452     $ARCH_EXT_LIST_ARM
1453     $ARCH_EXT_LIST_MIPS
1454     $ARCH_EXT_LIST_PPC
1455     $ARCH_EXT_LIST_X86
1456     vis
1457 "
1458
1459 ARCH_FEATURES="
1460     aligned_stack
1461     fast_64bit
1462     fast_clz
1463     fast_cmov
1464     local_aligned_8
1465     local_aligned_16
1466     simd_align_16
1467 "
1468
1469 BUILTIN_LIST="
1470     atomic_cas_ptr
1471     machine_rw_barrier
1472     MemoryBarrier
1473     mm_empty
1474     rdtsc
1475     sync_val_compare_and_swap
1476 "
1477 HAVE_LIST_CMDLINE="
1478     inline_asm
1479     symver
1480     yasm
1481 "
1482
1483 HAVE_LIST_PUB="
1484     bigendian
1485     fast_unaligned
1486 "
1487
1488 HEADERS_LIST="
1489     AVFoundation_AVFoundation_h
1490     alsa_asoundlib_h
1491     altivec_h
1492     arpa_inet_h
1493     cdio_paranoia_h
1494     cdio_paranoia_paranoia_h
1495     dev_bktr_ioctl_bt848_h
1496     dev_bktr_ioctl_meteor_h
1497     dev_ic_bt8xx_h
1498     dev_video_bktr_ioctl_bt848_h
1499     dev_video_meteor_ioctl_meteor_h
1500     direct_h
1501     dlfcn_h
1502     d3d11_h
1503     dxva_h
1504     gsm_h
1505     io_h
1506     mach_mach_time_h
1507     machine_ioctl_bt848_h
1508     machine_ioctl_meteor_h
1509     malloc_h
1510     poll_h
1511     sndio_h
1512     soundcard_h
1513     sys_mman_h
1514     sys_param_h
1515     sys_resource_h
1516     sys_select_h
1517     sys_soundcard_h
1518     sys_time_h
1519     sys_un_h
1520     sys_videoio_h
1521     unistd_h
1522     valgrind_valgrind_h
1523     windows_h
1524     winsock2_h
1525 "
1526
1527 INTRINSICS_LIST="
1528     intrinsics_neon
1529 "
1530
1531 MATH_FUNCS="
1532     atanf
1533     atan2f
1534     cbrtf
1535     cosf
1536     exp2
1537     exp2f
1538     expf
1539     isinf
1540     isnan
1541     ldexpf
1542     llrint
1543     llrintf
1544     log2
1545     log2f
1546     log10f
1547     lrint
1548     lrintf
1549     powf
1550     rint
1551     round
1552     roundf
1553     sinf
1554     trunc
1555     truncf
1556 "
1557
1558 SYSTEM_FUNCS="
1559     aligned_malloc
1560     clock_gettime
1561     closesocket
1562     CommandLineToArgvW
1563     CoTaskMemFree
1564     CryptGenRandom
1565     dlopen
1566     fcntl
1567     flt_lim
1568     fork
1569     getaddrinfo
1570     gethrtime
1571     getopt
1572     GetProcessAffinityMask
1573     GetProcessMemoryInfo
1574     GetProcessTimes
1575     getrusage
1576     GetSystemTimeAsFileTime
1577     gettimeofday
1578     gmtime_r
1579     inet_aton
1580     isatty
1581     jack_port_get_latency_range
1582     LoadLibrary
1583     localtime_r
1584     mach_absolute_time
1585     MapViewOfFile
1586     memalign
1587     mkstemp
1588     mmap
1589     mprotect
1590     nanosleep
1591     posix_memalign
1592     sched_getaffinity
1593     SetConsoleTextAttribute
1594     setmode
1595     setrlimit
1596     Sleep
1597     strerror_r
1598     sysconf
1599     sysctl
1600     usleep
1601     VirtualAlloc
1602 "
1603
1604 TOOLCHAIN_FEATURES="
1605     as_dn_directive
1606     as_func
1607     as_object_arch
1608     asm_mod_q
1609     attribute_may_alias
1610     attribute_packed
1611     ebp_available
1612     ebx_available
1613     gnu_as
1614     ibm_asm
1615     inline_asm_labels
1616     pragma_deprecated
1617     symver_asm_label
1618     symver_gnu_asm
1619     vfp_args
1620     xform_asm
1621     xmm_clobbers
1622 "
1623
1624 TYPES_LIST="
1625     CONDITION_VARIABLE_Ptr
1626     socklen_t
1627     struct_addrinfo
1628     struct_group_source_req
1629     struct_ip_mreq_source
1630     struct_ipv6_mreq
1631     struct_pollfd
1632     struct_rusage_ru_maxrss
1633     struct_sockaddr_in6
1634     struct_sockaddr_sa_len
1635     struct_sockaddr_storage
1636     struct_v4l2_frmivalenum_discrete
1637 "
1638
1639 HAVE_LIST="
1640     $ARCH_EXT_LIST
1641     $(add_suffix _external $ARCH_EXT_LIST)
1642     $(add_suffix _inline   $ARCH_EXT_LIST)
1643     $ARCH_FEATURES
1644     $ATOMICS_LIST
1645     $BUILTIN_LIST
1646     $HAVE_LIST_CMDLINE
1647     $HAVE_LIST_PUB
1648     $HEADERS_LIST
1649     $INTRINSICS_LIST
1650     $MATH_FUNCS
1651     $SYSTEM_FUNCS
1652     $THREADS_LIST
1653     $TOOLCHAIN_FEATURES
1654     $TYPES_LIST
1655     atomics_native
1656     dos_paths
1657     dxva2_lib
1658     libc_msvcrt
1659     libdc1394_1
1660     libdc1394_2
1661     sdl
1662     section_data_rel_ro
1663     threads
1664     vaapi_x11
1665     vdpau_x11
1666     xlib
1667 "
1668
1669 # options emitted with CONFIG_ prefix but not available on the command line
1670 CONFIG_EXTRA="
1671     aandcttables
1672     ac3dsp
1673     audio_frame_queue
1674     audiodsp
1675     blockdsp
1676     bswapdsp
1677     cabac
1678     dirac_parse
1679     dvprofile
1680     faandct
1681     faanidct
1682     fdctdsp
1683     flacdsp
1684     fmtconvert
1685     g722dsp
1686     gcrypt
1687     gmp
1688     golomb
1689     gplv3
1690     h263dsp
1691     h264chroma
1692     h264dsp
1693     h264pred
1694     h264qpel
1695     hpeldsp
1696     huffman
1697     huffyuvdsp
1698     huffyuvencdsp
1699     idctdsp
1700     iirfilter
1701     imdct15
1702     intrax8
1703     ividsp
1704     jpegtables
1705     libx262
1706     lgplv3
1707     lpc
1708     lzf
1709     me_cmp
1710     mpeg_er
1711     mpegaudio
1712     mpegaudiodsp
1713     mpegvideo
1714     mpegvideoenc
1715     mss34dsp
1716     pixblockdsp
1717     qpeldsp
1718     qsv
1719     qsvdec
1720     qsvenc
1721     rangecoder
1722     riffdec
1723     riffenc
1724     rtpdec
1725     rtpenc_chain
1726     rv34dsp
1727     sinewin
1728     snappy
1729     startcode
1730     texturedsp
1731     texturedspenc
1732     tpeldsp
1733     videodsp
1734     vp3dsp
1735     vp56dsp
1736     vp8dsp
1737     wma_freqs
1738     wmv2dsp
1739 "
1740
1741 CMDLINE_SELECT="
1742     $ARCH_EXT_LIST
1743     $CONFIG_LIST
1744     $HAVE_LIST_CMDLINE
1745     $THREADS_LIST
1746     asm
1747     cross_compile
1748     debug
1749     extra_warnings
1750     logging
1751     lto
1752     optimizations
1753     rpath
1754 "
1755
1756 PATHS_LIST="
1757     bindir
1758     datadir
1759     docdir
1760     incdir
1761     libdir
1762     mandir
1763     prefix
1764     shlibdir
1765 "
1766
1767 CMDLINE_SET="
1768     $PATHS_LIST
1769     ar
1770     arch
1771     as
1772     build_suffix
1773     cc
1774     objcc
1775     cpu
1776     cross_prefix
1777     custom_allocator
1778     dep_cc
1779     env
1780     extra_version
1781     host_cc
1782     host_cflags
1783     host_ld
1784     host_ldflags
1785     host_libs
1786     host_os
1787     ld
1788     logfile
1789     malloc_prefix
1790     nm
1791     optflags
1792     pkg_config
1793     pkg_config_flags
1794     random_seed
1795     samples
1796     sysinclude
1797     sysroot
1798     target_exec
1799     target_os
1800     target_path
1801     target_samples
1802     toolchain
1803 "
1804
1805 CMDLINE_APPEND="
1806     extra_cflags
1807     extra_objcflags
1808     host_cppflags
1809 "
1810
1811 # code dependency declarations
1812
1813 # architecture extensions
1814
1815 armv5te_deps="arm"
1816 armv6_deps="arm"
1817 armv6t2_deps="arm"
1818 armv8_deps="aarch64"
1819 neon_deps_any="aarch64 arm"
1820 intrinsics_neon_deps="neon"
1821 vfp_deps_any="aarch64 arm"
1822 vfpv3_deps="vfp"
1823
1824 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1825
1826 altivec_deps="ppc"
1827 ppc4xx_deps="ppc"
1828 vsx_deps="altivec"
1829 power8_deps="vsx"
1830
1831 cpunop_deps="i686"
1832 x86_64_select="i686"
1833 x86_64_suggest="fast_cmov"
1834
1835 amd3dnow_deps="mmx"
1836 amd3dnowext_deps="amd3dnow"
1837 i686_deps="x86"
1838 mmx_deps="x86"
1839 mmxext_deps="mmx"
1840 sse_deps="mmxext"
1841 sse2_deps="sse"
1842 sse3_deps="sse2"
1843 ssse3_deps="sse3"
1844 sse4_deps="ssse3"
1845 sse42_deps="sse4"
1846 avx_deps="sse42"
1847 xop_deps="avx"
1848 fma3_deps="avx"
1849 fma4_deps="avx"
1850 avx2_deps="avx"
1851
1852 mmx_external_deps="yasm"
1853 mmx_inline_deps="inline_asm"
1854 mmx_suggest="mmx_external mmx_inline"
1855
1856 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1857     eval dep=\$${ext}_deps
1858     eval ${ext}_external_deps='"${dep}_external"'
1859     eval ${ext}_inline_deps='"${dep}_inline"'
1860     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1861 done
1862
1863 aligned_stack_if_any="aarch64 ppc x86"
1864 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1865 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1866 fast_unaligned_if_any="aarch64 ppc x86"
1867 simd_align_16_if_any="altivec neon sse"
1868
1869 # system capabilities
1870 symver_if_any="symver_asm_label symver_gnu_asm"
1871 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
1872
1873 # threading support
1874 atomics_gcc_if="sync_val_compare_and_swap"
1875 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1876 atomics_win32_if="MemoryBarrier"
1877 atomics_native_if_any="$ATOMICS_LIST"
1878 w32threads_deps="atomics_native"
1879 threads_if_any="$THREADS_LIST"
1880
1881 # subsystems
1882 dct_select="rdft"
1883 dirac_parse_select="golomb"
1884 error_resilience_select="me_cmp"
1885 faandct_deps="faan fdctdsp"
1886 faanidct_deps="faan idctdsp"
1887 intrax8_select="error_resilience"
1888 mdct_select="fft"
1889 rdft_select="fft"
1890 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1891 mpeg_er_select="error_resilience"
1892 mpegaudio_select="mpegaudiodsp"
1893 mpegaudiodsp_select="dct"
1894 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp videodsp"
1895 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1896 nvenc_deps_any="dlopen LoadLibrary"
1897 nvenc_extralibs='$ldl'
1898 qsvdec_select="qsv"
1899 qsvenc_select="qsv"
1900
1901 # decoders / encoders
1902 aac_decoder_select="imdct15 mdct sinewin"
1903 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1904 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1905 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1906 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1907 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1908 adpcm_g722_decoder_select="g722dsp"
1909 adpcm_g722_encoder_select="g722dsp"
1910 aic_decoder_select="golomb idctdsp"
1911 alac_encoder_select="lpc"
1912 als_decoder_select="bswapdsp"
1913 amrnb_decoder_select="lsp"
1914 amrwb_decoder_select="lsp"
1915 amv_decoder_select="sp5x_decoder"
1916 ape_decoder_select="bswapdsp"
1917 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1918 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1919 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1920 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1921 atrac1_decoder_select="mdct sinewin"
1922 atrac3_decoder_select="mdct"
1923 atrac3p_decoder_select="mdct sinewin"
1924 bink_decoder_select="blockdsp hpeldsp"
1925 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1926 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1927 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1928 cllc_decoder_select="bswapdsp"
1929 comfortnoise_encoder_select="lpc"
1930 cook_decoder_select="audiodsp mdct sinewin"
1931 cscd_decoder_select="lzo"
1932 cscd_decoder_suggest="zlib"
1933 dca_decoder_select="fmtconvert mdct"
1934 dds_decoder_select="texturedsp"
1935 dnxhd_decoder_select="blockdsp idctdsp"
1936 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1937 dvvideo_decoder_select="dvprofile idctdsp"
1938 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1939 dxa_decoder_deps="zlib"
1940 dxv_decoder_select="lzf texturedsp"
1941 eac3_decoder_select="ac3_decoder"
1942 eac3_encoder_select="ac3_encoder"
1943 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1944 eatgq_decoder_select="aandcttables idctdsp"
1945 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpeg1video_decoder"
1946 exr_decoder_deps="zlib"
1947 ffv1_decoder_select="golomb rangecoder"
1948 ffv1_encoder_select="rangecoder"
1949 ffvhuff_decoder_select="huffyuv_decoder"
1950 ffvhuff_encoder_select="huffyuv_encoder"
1951 fic_decoder_select="golomb"
1952 flac_decoder_select="flacdsp golomb"
1953 flac_encoder_select="bswapdsp flacdsp golomb lpc"
1954 flashsv_decoder_deps="zlib"
1955 flashsv_encoder_deps="zlib"
1956 flashsv2_decoder_deps="zlib"
1957 flv_decoder_select="h263_decoder"
1958 flv_encoder_select="h263_encoder"
1959 fourxm_decoder_select="blockdsp bswapdsp"
1960 fraps_decoder_select="bswapdsp huffman"
1961 g2m_decoder_deps="zlib"
1962 g2m_decoder_select="blockdsp idctdsp jpegtables"
1963 h261_decoder_select="mpeg_er mpegvideo"
1964 h261_encoder_select="aandcttables mpegvideoenc"
1965 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
1966 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1967 h263i_decoder_select="h263_decoder"
1968 h263p_encoder_select="h263_encoder"
1969 h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel startcode videodsp"
1970 h264_decoder_suggest="error_resilience"
1971 h264_nvenc_encoder_deps="nvenc"
1972 h264_qsv_decoder_deps="libmfx"
1973 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
1974 h264_qsv_encoder_deps="libmfx"
1975 h264_qsv_encoder_select="qsvenc"
1976 hap_decoder_select="snappy texturedsp"
1977 hap_encoder_deps="libsnappy"
1978 hap_encoder_select="texturedspenc"
1979 hevc_decoder_select="bswapdsp cabac golomb videodsp"
1980 hevc_nvenc_encoder_deps="nvenc"
1981 hevc_qsv_encoder_deps="libmfx"
1982 hevc_qsv_decoder_deps="libmfx"
1983 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser qsvdec hevc_qsv_hwaccel"
1984 hevc_qsv_encoder_select="qsvenc"
1985 huffyuv_decoder_select="bswapdsp huffyuvdsp"
1986 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
1987 iac_decoder_select="imc_decoder"
1988 imc_decoder_select="bswapdsp fft mdct sinewin"
1989 indeo3_decoder_select="hpeldsp"
1990 indeo4_decoder_select="ividsp"
1991 indeo5_decoder_select="ividsp"
1992 interplay_video_decoder_select="hpeldsp"
1993 jpegls_decoder_select="golomb mjpeg_decoder"
1994 jpegls_encoder_select="golomb"
1995 jv_decoder_select="blockdsp"
1996 lagarith_decoder_select="huffyuvdsp"
1997 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
1998 loco_decoder_select="golomb"
1999 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2000 metasound_decoder_select="lsp mdct sinewin"
2001 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2002 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
2003 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
2004 mjpegb_decoder_select="mjpeg_decoder"
2005 mlp_decoder_select="mlp_parser"
2006 motionpixels_decoder_select="bswapdsp"
2007 mp1_decoder_select="mpegaudio"
2008 mp1float_decoder_select="mpegaudio"
2009 mp2_decoder_select="mpegaudio"
2010 mp2float_decoder_select="mpegaudio"
2011 mp3_decoder_select="mpegaudio"
2012 mp3adu_decoder_select="mpegaudio"
2013 mp3adufloat_decoder_select="mpegaudio"
2014 mp3float_decoder_select="mpegaudio"
2015 mp3on4_decoder_select="mpegaudio"
2016 mp3on4float_decoder_select="mpegaudio"
2017 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2018 mpc8_decoder_select="mpegaudiodsp"
2019 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2020 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2021 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2022 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2023 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2024 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2025 mpeg2_qsv_decoder_deps="libmfx"
2026 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2027 mpeg2_qsv_encoder_deps="libmfx"
2028 mpeg2_qsv_encoder_select="qsvenc"
2029 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2030 mpeg4_encoder_select="h263_encoder"
2031 msa1_decoder_select="mss34dsp"
2032 msmpeg4v1_decoder_select="h263_decoder"
2033 msmpeg4v2_decoder_select="h263_decoder"
2034 msmpeg4v2_encoder_select="h263_encoder"
2035 msmpeg4v3_decoder_select="h263_decoder"
2036 msmpeg4v3_encoder_select="h263_encoder"
2037 mss2_decoder_select="error_resilience mpeg_er qpeldsp vc1_decoder"
2038 mts2_decoder_select="mss34dsp"
2039 mxpeg_decoder_select="mjpeg_decoder"
2040 nellymoser_decoder_select="mdct sinewin"
2041 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2042 nuv_decoder_select="idctdsp lzo"
2043 nvenc_h264_encoder_deps="nvenc"
2044 nvenc_hevc_encoder_deps="nvenc"
2045 on2avc_decoder_select="mdct"
2046 opus_decoder_deps="avresample"
2047 opus_decoder_select="imdct15"
2048 png_decoder_deps="zlib"
2049 png_encoder_deps="zlib"
2050 png_encoder_select="huffyuvencdsp"
2051 prores_decoder_select="idctdsp"
2052 prores_encoder_select="fdctdsp"
2053 qcelp_decoder_select="lsp"
2054 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2055 ra_144_encoder_select="audio_frame_queue lpc"
2056 ralf_decoder_select="golomb"
2057 rscc_decoder_deps="zlib"
2058 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2059 rv10_encoder_select="h263_encoder"
2060 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2061 rv20_encoder_select="h263_encoder"
2062 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2063 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2064 screenpresso_decoder_deps="zlib"
2065 shorten_decoder_select="golomb"
2066 sipr_decoder_select="lsp"
2067 sp5x_decoder_select="mjpeg_decoder"
2068 svq1_decoder_select="hpeldsp"
2069 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2070 svq3_decoder_select="h264_decoder hpeldsp tpeldsp"
2071 svq3_decoder_suggest="zlib"
2072 tak_decoder_select="audiodsp"
2073 tdsc_decoder_deps="zlib"
2074 tdsc_decoder_select="mjpeg_decoder"
2075 theora_decoder_select="vp3_decoder"
2076 thp_decoder_select="mjpeg_decoder"
2077 tiff_decoder_suggest="zlib"
2078 tiff_encoder_suggest="zlib"
2079 truehd_decoder_select="mlp_decoder"
2080 truemotion2_decoder_select="bswapdsp"
2081 truespeech_decoder_select="bswapdsp"
2082 tscc_decoder_deps="zlib"
2083 txd_decoder_select="texturedsp"
2084 twinvq_decoder_select="mdct lsp sinewin"
2085 utvideo_decoder_select="bswapdsp"
2086 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2087 vble_decoder_select="huffyuvdsp"
2088 vc1_decoder_select="blockdsp error_resilience h263_decoder h264chroma h264qpel intrax8 mpeg_er qpeldsp startcode"
2089 vc1image_decoder_select="vc1_decoder"
2090 vorbis_decoder_select="mdct"
2091 vorbis_encoder_select="mdct"
2092 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2093 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2094 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2095 vp6a_decoder_select="vp6_decoder"
2096 vp6f_decoder_select="vp6_decoder"
2097 vp7_decoder_select="h264pred videodsp vp8dsp"
2098 vp8_decoder_select="h264pred videodsp vp8dsp"
2099 vp9_decoder_select="videodsp"
2100 webp_decoder_select="vp8_decoder"
2101 wmapro_decoder_select="mdct sinewin wma_freqs"
2102 wmav1_decoder_select="mdct sinewin wma_freqs"
2103 wmav1_encoder_select="mdct sinewin wma_freqs"
2104 wmav2_decoder_select="mdct sinewin wma_freqs"
2105 wmav2_encoder_select="mdct sinewin wma_freqs"
2106 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2107 wmv1_decoder_select="h263_decoder"
2108 wmv1_encoder_select="h263_encoder"
2109 wmv2_decoder_select="blockdsp h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2110 wmv2_encoder_select="h263_encoder wmv2dsp"
2111 wmv3_decoder_select="vc1_decoder"
2112 wmv3image_decoder_select="wmv3_decoder"
2113 zerocodec_decoder_deps="zlib"
2114 zlib_decoder_deps="zlib"
2115 zlib_encoder_deps="zlib"
2116 zmbv_decoder_deps="zlib"
2117 zmbv_encoder_deps="zlib"
2118
2119 # hardware accelerators
2120 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2121 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2122 vaapi_deps="va_va_h"
2123 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2124 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2125 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2126
2127 h263_vaapi_hwaccel_deps="vaapi"
2128 h263_vaapi_hwaccel_select="h263_decoder"
2129 h264_d3d11va_hwaccel_deps="d3d11va"
2130 h264_d3d11va_hwaccel_select="h264_decoder"
2131 h264_dxva2_hwaccel_deps="dxva2"
2132 h264_dxva2_hwaccel_select="h264_decoder"
2133 h264_mmal_decoder_deps="mmal"
2134 h264_mmal_hwaccel_deps="mmal"
2135 h264_mmal_decoder_select="h264_decoder"
2136 h264_mmal_encoder_deps="mmal"
2137 h264_qsv_hwaccel_deps="libmfx"
2138 h264_vaapi_hwaccel_deps="vaapi"
2139 h264_vaapi_hwaccel_select="h264_decoder"
2140 h264_vda_hwaccel_deps="vda"
2141 h264_vda_hwaccel_select="h264_decoder"
2142 h264_vda_old_hwaccel_deps="vda"
2143 h264_vda_old_hwaccel_select="h264_decoder"
2144 h264_vdpau_hwaccel_deps="vdpau"
2145 h264_vdpau_hwaccel_select="h264_decoder"
2146 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2147 hevc_d3d11va_hwaccel_select="hevc_decoder"
2148 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2149 hevc_dxva2_hwaccel_select="hevc_decoder"
2150 hevc_qsv_hwaccel_deps="libmfx"
2151 mpeg1_vdpau_hwaccel_deps="vdpau"
2152 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2153 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2154 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2155 mpeg2_dxva2_hwaccel_deps="dxva2"
2156 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2157 mpeg2_qsv_hwaccel_deps="libmfx"
2158 mpeg2_vaapi_hwaccel_deps="vaapi"
2159 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2160 mpeg2_vdpau_hwaccel_deps="vdpau"
2161 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2162 mpeg4_vaapi_hwaccel_deps="vaapi"
2163 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2164 mpeg4_vdpau_hwaccel_deps="vdpau"
2165 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2166 vc1_d3d11va_hwaccel_deps="d3d11va"
2167 vc1_d3d11va_hwaccel_select="vc1_decoder"
2168 vc1_dxva2_hwaccel_deps="dxva2"
2169 vc1_dxva2_hwaccel_select="vc1_decoder"
2170 vc1_vaapi_hwaccel_deps="vaapi"
2171 vc1_vaapi_hwaccel_select="vc1_decoder"
2172 vc1_vdpau_hwaccel_deps="vdpau"
2173 vc1_vdpau_hwaccel_select="vc1_decoder"
2174 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2175 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2176 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2177 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2178
2179 # parsers
2180 h264_parser_select="h264_decoder"
2181 hevc_parser_select="golomb"
2182 mpegvideo_parser_select="mpegvideo"
2183 mpeg4video_parser_select="error_resilience h263dsp mpeg_er mpegvideo qpeldsp"
2184 vc1_parser_select="mpegvideo startcode vc1_decoder"
2185
2186 # bitstream_filters
2187 mjpeg2jpeg_bsf_select="jpegtables"
2188
2189 # external libraries
2190 libdcadec_decoder_deps="libdcadec"
2191 libfaac_encoder_deps="libfaac"
2192 libfaac_encoder_select="audio_frame_queue"
2193 libfdk_aac_decoder_deps="libfdk_aac"
2194 libfdk_aac_encoder_deps="libfdk_aac"
2195 libfdk_aac_encoder_select="audio_frame_queue"
2196 libgsm_decoder_deps="libgsm"
2197 libgsm_encoder_deps="libgsm"
2198 libgsm_ms_decoder_deps="libgsm"
2199 libgsm_ms_encoder_deps="libgsm"
2200 libilbc_decoder_deps="libilbc"
2201 libilbc_encoder_deps="libilbc"
2202 libkvazaar_encoder_deps="libkvazaar"
2203 libmp3lame_encoder_deps="libmp3lame"
2204 libmp3lame_encoder_select="audio_frame_queue"
2205 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2206 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2207 libopencore_amrnb_encoder_select="audio_frame_queue"
2208 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2209 libopenh264_encoder_deps="libopenh264"
2210 libopenjpeg_decoder_deps="libopenjpeg"
2211 libopenjpeg_encoder_deps="libopenjpeg"
2212 libopus_decoder_deps="libopus"
2213 libopus_encoder_deps="libopus"
2214 libopus_encoder_select="audio_frame_queue"
2215 libschroedinger_decoder_deps="libschroedinger"
2216 libschroedinger_encoder_deps="libschroedinger"
2217 libspeex_decoder_deps="libspeex"
2218 libspeex_encoder_deps="libspeex"
2219 libspeex_encoder_select="audio_frame_queue"
2220 libtheora_encoder_deps="libtheora"
2221 libtwolame_encoder_deps="libtwolame"
2222 libvo_aacenc_encoder_deps="libvo_aacenc"
2223 libvo_aacenc_encoder_select="audio_frame_queue"
2224 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2225 libvorbis_encoder_deps="libvorbis"
2226 libvorbis_encoder_select="audio_frame_queue"
2227 libvpx_vp8_decoder_deps="libvpx"
2228 libvpx_vp8_encoder_deps="libvpx"
2229 libvpx_vp9_decoder_deps="libvpx"
2230 libvpx_vp9_encoder_deps="libvpx"
2231 libwavpack_encoder_deps="libwavpack"
2232 libwebp_encoder_deps="libwebp"
2233 libx262_encoder_deps="libx262"
2234 libx264_encoder_deps="libx264"
2235 libx265_encoder_deps="libx265"
2236 libxavs_encoder_deps="libxavs"
2237 libxvid_encoder_deps="libxvid"
2238
2239 # demuxers / muxers
2240 ac3_demuxer_select="ac3_parser"
2241 asf_demuxer_select="riffdec"
2242 asf_muxer_select="riffenc"
2243 asf_stream_muxer_select="asf_muxer"
2244 avi_demuxer_select="riffdec"
2245 avi_muxer_select="riffenc"
2246 avisynth_demuxer_deps="avisynth"
2247 avisynth_demuxer_select="riffdec"
2248 caf_demuxer_select="riffdec"
2249 dash_muxer_select="mp4_muxer"
2250 dirac_demuxer_select="dirac_parser"
2251 dv_demuxer_select="dvprofile"
2252 dv_muxer_select="dvprofile"
2253 dxa_demuxer_select="riffdec"
2254 eac3_demuxer_select="ac3_parser"
2255 f4v_muxer_select="mov_muxer"
2256 flac_demuxer_select="flac_parser"
2257 hds_muxer_select="flv_muxer"
2258 hls_muxer_select="mpegts_muxer"
2259 ipod_muxer_select="mov_muxer"
2260 ismv_muxer_select="mov_muxer"
2261 matroska_audio_muxer_select="matroska_muxer"
2262 matroska_demuxer_select="riffdec"
2263 matroska_demuxer_suggest="bzlib lzo zlib"
2264 matroska_muxer_select="riffenc"
2265 mmf_muxer_select="riffenc"
2266 mov_demuxer_select="riffdec"
2267 mov_demuxer_suggest="zlib"
2268 mov_muxer_select="riffenc rtpenc_chain"
2269 mp3_demuxer_select="mpegaudio_parser"
2270 mp4_muxer_select="mov_muxer"
2271 mpegts_muxer_select="adts_muxer latm_muxer"
2272 mpegtsraw_demuxer_select="mpegts_demuxer"
2273 mxf_d10_muxer_select="mxf_muxer"
2274 nut_muxer_select="riffenc"
2275 nuv_demuxer_select="riffdec"
2276 oga_muxer_select="ogg_muxer"
2277 ogg_demuxer_select="dirac_parse"
2278 opus_muxer_select="ogg_muxer"
2279 psp_muxer_select="mov_muxer"
2280 rtp_demuxer_select="sdp_demuxer"
2281 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol"
2282 rtsp_demuxer_select="http_protocol rtpdec"
2283 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2284 sap_demuxer_select="sdp_demuxer"
2285 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2286 sdp_demuxer_select="rtpdec"
2287 smoothstreaming_muxer_select="ismv_muxer"
2288 spdif_muxer_select="aac_parser"
2289 spx_muxer_select="ogg_muxer"
2290 swf_demuxer_suggest="zlib"
2291 tak_demuxer_select="tak_parser"
2292 tg2_muxer_select="mov_muxer"
2293 tgp_muxer_select="mov_muxer"
2294 w64_demuxer_select="wav_demuxer"
2295 wav_demuxer_select="riffdec"
2296 wav_muxer_select="riffenc"
2297 webm_muxer_select="riffenc"
2298 webm_muxer_suggest="libopus_encoder libvorbis_encoder libvpx_vp8_encoder libvpx_vp9_encoder"
2299 wtv_demuxer_select="riffdec"
2300 xmv_demuxer_select="riffdec"
2301 xwma_demuxer_select="riffdec"
2302
2303 # indevs / outdevs
2304 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2305 alsa_outdev_deps="alsa_asoundlib_h"
2306 avfoundation_indev_deps="AVFoundation_AVFoundation_h"
2307 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2308 dv1394_indev_deps="dv1394"
2309 dv1394_indev_select="dv_demuxer"
2310 fbdev_indev_deps="linux_fb_h"
2311 jack_indev_deps="jack_jack_h pthreads"
2312 libcdio_indev_deps="libcdio"
2313 libdc1394_indev_deps="libdc1394"
2314 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2315 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2316 pulse_indev_deps="libpulse"
2317 sndio_indev_deps="sndio_h"
2318 sndio_outdev_deps="sndio_h"
2319 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2320 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2321 vfwcap_indev_extralibs="-lavicap32"
2322 x11grab_indev_deps="x11grab"
2323 x11grab_xcb_indev_deps="libxcb"
2324
2325 # protocols
2326 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2327 ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
2328 ffrtmpcrypt_protocol_select="tcp_protocol"
2329 ffrtmphttp_protocol_deps="!librtmp_protocol"
2330 ffrtmphttp_protocol_select="http_protocol"
2331 gopher_protocol_select="network"
2332 http_protocol_select="tcp_protocol"
2333 httpproxy_protocol_select="tcp_protocol"
2334 https_protocol_select="tls_protocol"
2335 icecast_protocol_select="http_protocol"
2336 librtmp_protocol_deps="librtmp"
2337 librtmpe_protocol_deps="librtmp"
2338 librtmps_protocol_deps="librtmp"
2339 librtmpt_protocol_deps="librtmp"
2340 librtmpte_protocol_deps="librtmp"
2341 mmsh_protocol_select="http_protocol"
2342 mmst_protocol_select="network"
2343 rtmp_protocol_deps="!librtmp_protocol"
2344 rtmp_protocol_select="tcp_protocol"
2345 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2346 rtmps_protocol_deps="!librtmp_protocol"
2347 rtmps_protocol_select="tls_protocol"
2348 rtmpt_protocol_select="ffrtmphttp_protocol"
2349 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2350 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2351 rtp_protocol_select="udp_protocol"
2352 sctp_protocol_deps="struct_sctp_event_subscribe"
2353 sctp_protocol_select="network"
2354 srtp_protocol_select="rtp_protocol"
2355 tcp_protocol_select="network"
2356 tls_gnutls_protocol_deps="gnutls"
2357 tls_gnutls_protocol_select="tcp_protocol"
2358 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
2359 tls_openssl_protocol_select="tcp_protocol"
2360 tls_protocol_select_any="tls_gnutls_protocol tls_openssl_protocol"
2361 udp_protocol_select="network"
2362 unix_protocol_deps="sys_un_h"
2363 unix_protocol_select="network"
2364
2365 # filters
2366 blackframe_filter_deps="gpl"
2367 boxblur_filter_deps="gpl"
2368 bs2b_filter_deps="libbs2b"
2369 cropdetect_filter_deps="gpl"
2370 delogo_filter_deps="gpl"
2371 drawtext_filter_deps="libfreetype"
2372 frei0r_filter_deps="frei0r dlopen"
2373 frei0r_filter_extralibs='$ldl'
2374 frei0r_src_filter_deps="frei0r dlopen"
2375 frei0r_src_filter_extralibs='$ldl'
2376 hqdn3d_filter_deps="gpl"
2377 interlace_filter_deps="gpl"
2378 ocv_filter_deps="libopencv"
2379 resample_filter_deps="avresample"
2380 scale_filter_deps="swscale"
2381
2382 # examples
2383 avcodec_example_deps="avcodec avutil"
2384 filter_audio_example_deps="avfilter avutil"
2385 metadata_example_deps="avformat avutil"
2386 output_example_deps="avcodec avformat avutil swscale"
2387 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder vaapi_x11"
2388 transcode_aac_example_deps="avcodec avformat avresample"
2389
2390 # libraries, in linking order
2391 avcodec_deps="avutil"
2392 avdevice_deps="avformat avcodec avutil"
2393 avfilter_deps="avutil"
2394 avformat_deps="avcodec avutil"
2395 avresample_deps="avutil"
2396 swscale_deps="avutil"
2397
2398 # programs
2399 avconv_deps="avcodec avfilter avformat avresample swscale"
2400 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2401                fps_filter null_filter resample_filter scale_filter
2402                setpts_filter trim_filter"
2403 avplay_deps="avcodec avformat avresample swscale sdl"
2404 avplay_libs='$sdl_libs'
2405 avplay_select="rdft transpose_filter hflip_filter vflip_filter"
2406 avprobe_deps="avcodec avformat"
2407
2408 # documentation
2409 pod2man_deps="doc"
2410 texi2html_deps="doc"
2411
2412 # default parameters
2413
2414 logfile="config.log"
2415
2416 # installation paths
2417 prefix_default="/usr/local"
2418 bindir_default='${prefix}/bin'
2419 datadir_default='${prefix}/share/avconv'
2420 docdir_default='${prefix}/share/doc/libav'
2421 incdir_default='${prefix}/include'
2422 libdir_default='${prefix}/lib'
2423 mandir_default='${prefix}/share/man'
2424 shlibdir_default="$libdir_default"
2425
2426 # toolchain
2427 ar_default="ar"
2428 cc_default="gcc"
2429 host_cc_default="gcc"
2430 cp_f="cp -f"
2431 ln_s="ln -s -f"
2432 nm_default="nm -g"
2433 objformat="elf"
2434 pkg_config_default=pkg-config
2435 ranlib="ranlib"
2436 strip="strip"
2437 yasmexe="yasm"
2438
2439 # machine
2440 arch_default=$(uname -m)
2441 cpu="generic"
2442 intrinsics="none"
2443
2444 # OS
2445 target_os_default=$(tolower $(uname -s))
2446 host_os=$target_os_default
2447
2448 # configurable options
2449 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2450
2451 enable asm
2452 enable debug
2453 enable doc
2454 enable faan faandct faanidct
2455 enable optimizations
2456 enable safe_bitstream_reader
2457 enable static
2458 enable swscale_alpha
2459 enable valgrind_backtrace
2460
2461 # By default, enable only those hwaccels that have no external dependencies.
2462 enable d3d11va dxva2 vda vdpau
2463
2464 # build settings
2465 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2466 LIBPREF="lib"
2467 LIBSUF=".a"
2468 FULLNAME='$(NAME)$(BUILDSUF)'
2469 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2470 SLIBPREF="lib"
2471 SLIBSUF=".so"
2472 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2473 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2474 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2475 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2476 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2477 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2478
2479 asflags_filter=echo
2480 cflags_filter=echo
2481 ldflags_filter=echo
2482
2483 AS_C='-c'
2484 AS_O='-o $@'
2485 CC_C='-c'
2486 CC_E='-E -o $@'
2487 CC_O='-o $@'
2488 OBJCC_C='-c'
2489 OBJCC_E='-E -o $@'
2490 OBJCC_O='-o $@'
2491 LD_O='-o $@'
2492 LD_LIB='-l%'
2493 LD_PATH='-L'
2494 HOSTCC_C='-c'
2495 HOSTCC_E='-E -o $@'
2496 HOSTCC_O='-o $@'
2497 HOSTLD_O='-o $@'
2498
2499 host_libs='-lm'
2500 host_cflags_filter=echo
2501 host_ldflags_filter=echo
2502
2503 target_path='$(CURDIR)'
2504
2505 # since the object filename is not given with the -MM flag, the compiler
2506 # is only able to print the basename, and we must add the path ourselves
2507 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2508 DEPFLAGS='-MM'
2509
2510 # find source path
2511 if test -f configure; then
2512     source_path=.
2513 else
2514     source_path=$(cd $(dirname "$0"); pwd)
2515     echo "$source_path" | grep -q '[[:blank:]]' &&
2516         die "Out of tree builds are impossible with whitespace in source path."
2517     test -e "$source_path/config.h" &&
2518         die "Out of tree builds are impossible with config.h in source dir."
2519 fi
2520
2521 for v in "$@"; do
2522     r=${v#*=}
2523     l=${v%"$r"}
2524     r=$(sh_quote "$r")
2525     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2526 done
2527
2528 find_things(){
2529     thing=$1
2530     pattern=$2
2531     file=$source_path/$3
2532     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2533 }
2534
2535 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2536 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2537 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2538 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2539 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2540 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2541 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2542 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2543 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2544 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2545 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2546
2547 ALL_COMPONENTS="
2548     $BSF_LIST
2549     $DECODER_LIST
2550     $DEMUXER_LIST
2551     $ENCODER_LIST
2552     $FILTER_LIST
2553     $HWACCEL_LIST
2554     $INDEV_LIST
2555     $MUXER_LIST
2556     $OUTDEV_LIST
2557     $PARSER_LIST
2558     $PROTOCOL_LIST
2559 "
2560
2561 enable $ARCH_EXT_LIST
2562
2563 die_unknown(){
2564     echo "Unknown option \"$1\"."
2565     echo "See $0 --help for available options."
2566     exit 1
2567 }
2568
2569 print_3_columns() {
2570     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2571 }
2572
2573 show_list() {
2574     suffix=_$1
2575     shift
2576     echo $* | sed s/$suffix//g | print_3_columns
2577     exit 0
2578 }
2579
2580 rand_list(){
2581     IFS=', '
2582     set -- $*
2583     unset IFS
2584     for thing; do
2585         comp=${thing%:*}
2586         prob=${thing#$comp}
2587         prob=${prob#:}
2588         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2589         echo "prob ${prob:-0.5}"
2590         printf '%s\n' $comp
2591     done
2592 }
2593
2594 do_random(){
2595     action=$1
2596     shift
2597     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2598     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2599 }
2600
2601 for opt do
2602     optval="${opt#*=}"
2603     case "$opt" in
2604         --extra-ldflags=*)
2605             add_ldflags $optval
2606         ;;
2607         --extra-ldexeflags=*)
2608             add_ldexeflags $optval
2609         ;;
2610         --extra-libs=*)
2611             add_extralibs $optval
2612         ;;
2613         --disable-devices)
2614             disable $INDEV_LIST $OUTDEV_LIST
2615         ;;
2616         --enable-debug=*)
2617             debuglevel="$optval"
2618         ;;
2619         --disable-programs)
2620             disable $PROGRAM_LIST
2621         ;;
2622         --disable-everything)
2623             map 'eval disable \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2624         ;;
2625         --disable-all)
2626             map 'eval disable \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2627             disable $LIBRARY_LIST $PROGRAM_LIST doc
2628         ;;
2629         --enable-random|--disable-random)
2630             action=${opt%%-random}
2631             do_random ${action#--} $COMPONENT_LIST
2632         ;;
2633         --enable-random=*|--disable-random=*)
2634             action=${opt%%-random=*}
2635             do_random ${action#--} $optval
2636         ;;
2637         --enable-*=*|--disable-*=*)
2638             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2639             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2640             eval list=\$$(toupper $thing)_LIST
2641             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2642             test $action = enable && action="request"
2643             $action $(filter "$name" $list)
2644         ;;
2645         --enable-avserver|--disable-avserver*)
2646             warn "avserver has been removed, the ${opt} option is only"\
2647                  "provided for compatibility and will be removed in the future"
2648         ;;
2649         --enable-?*|--disable-?*)
2650             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2651             if is_in $option $COMPONENT_LIST; then
2652                 eval $action \$$(toupper ${option%s})_LIST
2653             elif is_in $option $CMDLINE_SELECT; then
2654                 $action $option
2655             else
2656                 die_unknown $opt
2657             fi
2658         ;;
2659         --list-*)
2660             NAME="${opt#--list-}"
2661             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2662             NAME=${NAME%s}
2663             eval show_list $NAME \$$(toupper $NAME)_LIST
2664         ;;
2665         --help|-h) show_help
2666         ;;
2667         *)
2668             optname="${opt%%=*}"
2669             optname="${optname#--}"
2670             optname=$(echo "$optname" | sed 's/-/_/g')
2671             if is_in $optname $CMDLINE_SET; then
2672                 eval $optname='$optval'
2673             elif is_in $optname $CMDLINE_APPEND; then
2674                 append $optname "$optval"
2675             else
2676                 die_unknown $opt
2677             fi
2678         ;;
2679     esac
2680 done
2681
2682 for e in $env; do
2683     eval "export $e"
2684 done
2685
2686 disabled logging && logfile=/dev/null
2687
2688 # Disable all the library-specific components if the library itself
2689 # is disabled, see AVCODEC_LIST and following _LIST variables.
2690
2691 disable_components(){
2692     disabled ${1} && disable_weak $(
2693         eval components="\$$(toupper ${1})_COMPONENTS"
2694         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2695     )
2696 }
2697
2698 map 'disable_components $v' $LIBRARY_LIST
2699
2700 # Mark components that had not been enabled/disabled explicitly
2701 # as enabled
2702
2703 for n in $COMPONENT_LIST; do
2704     v=$(toupper ${n%s})_LIST
2705     eval enable_weak \$$v
2706     eval ${n}_if_any="\$$v"
2707 done
2708
2709 # Make so that disabled libraries are enabled if a component
2710 # of them is requested
2711
2712 for n in $LIBRARY_LIST; do
2713     v=$(toupper ${n})_COMPONENTS
2714     eval ${n}_if_any="\$$v"
2715 done
2716
2717 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2718 set >> $logfile
2719
2720 case "$toolchain" in
2721     clang-asan)
2722         cc_default="clang"
2723         add_cflags  -fsanitize=address
2724         add_ldflags -fsanitize=address
2725     ;;
2726     clang-tsan)
2727         cc_default="clang"
2728         add_cflags  -fsanitize=thread -pie
2729         add_ldflags -fsanitize=thread -pie
2730     ;;
2731     clang-usan)
2732         cc_default="clang"
2733         add_cflags  -fsanitize=undefined -O1
2734         add_ldflags -fsanitize=undefined
2735     ;;
2736     gcc-asan)
2737         cc_default="gcc"
2738         add_cflags  -fsanitize=address
2739         add_ldflags -fsanitize=address
2740     ;;
2741     gcc-tsan)
2742         cc_default="gcc"
2743         add_cflags  -fsanitize=thread -pie -fPIC
2744         add_ldflags -fsanitize=thread -pie -fPIC
2745     ;;
2746     gcc-usan)
2747         cc_default="gcc"
2748         add_cflags  -fsanitize=undefined
2749         add_ldflags -fsanitize=undefined
2750     ;;
2751     valgrind-massif)
2752         target_exec_default="valgrind"
2753         target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2754     ;;
2755     valgrind-memcheck)
2756         target_exec_default="valgrind"
2757         target_exec_args="--track-origins=yes --leak-check=full"
2758     ;;
2759     msvc)
2760         # Check whether the current MSVC version needs the C99 converter.
2761         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2762         # support enough of C99 to build libav. Default to the new
2763         # behaviour if the regexp was unable to match anything, since this
2764         # successfully parses the version number of existing supported
2765         # versions that require the converter (MSVC 2010 and 2012).
2766         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2767         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2768             cc_default="cl"
2769         else
2770             cc_default="c99wrap cl"
2771         fi
2772         ld_default="$source_path/compat/windows/mslink"
2773         nm_default="dumpbin -symbols"
2774         ar_default="lib"
2775         case "$arch" in
2776         arm*)
2777             as_default="armasm"
2778             ;;
2779         esac
2780         target_os_default="win32"
2781         # Use a relative path for TMPDIR. This makes sure all the
2782         # ffconf temp files are written with a relative path, avoiding
2783         # issues with msys/win32 path conversion for MSVC parameters
2784         # such as -Fo<file> or -out:<file>.
2785         TMPDIR=.
2786     ;;
2787     icl)
2788         cc_default="icl"
2789         ld_default="xilink"
2790         nm_default="dumpbin -symbols"
2791         ar_default="xilib"
2792         target_os_default="win32"
2793         TMPDIR=.
2794     ;;
2795     gcov)
2796         add_cflags  -fprofile-arcs -ftest-coverage
2797         add_ldflags -fprofile-arcs -ftest-coverage
2798     ;;
2799     hardened)
2800         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2801         add_cflags   -fno-strict-overflow -fstack-protector-all
2802         add_ldflags  -Wl,-z,relro -Wl,-z,now
2803     ;;
2804     ?*)
2805         die "Unknown toolchain $toolchain"
2806     ;;
2807 esac
2808
2809 test -n "$cross_prefix" && enable cross_compile
2810
2811 if enabled cross_compile; then
2812     test -n "$arch" && test -n "$target_os" ||
2813         die "Must specify target arch and OS when cross-compiling"
2814 fi
2815
2816 ar_default="${cross_prefix}${ar_default}"
2817 cc_default="${cross_prefix}${cc_default}"
2818 occ_default="${cross_prefix}${occ_default}"
2819 nm_default="${cross_prefix}${nm_default}"
2820 pkg_config_default="${cross_prefix}${pkg_config_default}"
2821 ranlib="${cross_prefix}${ranlib}"
2822 strip="${cross_prefix}${strip}"
2823
2824 sysinclude_default="${sysroot}/usr/include"
2825
2826 set_default arch cc pkg_config sysinclude target_exec target_os
2827 enabled cross_compile || host_cc_default=$cc
2828 set_default host_cc
2829
2830 if ! $pkg_config --version >/dev/null 2>&1; then
2831     warn "$pkg_config not found, library detection may fail."
2832     pkg_config=false
2833 fi
2834
2835 exesuf() {
2836     case $1 in
2837         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2838     esac
2839 }
2840
2841 EXESUF=$(exesuf $target_os)
2842 HOSTEXESUF=$(exesuf $host_os)
2843
2844 # set temporary file name
2845 : ${TMPDIR:=$TEMPDIR}
2846 : ${TMPDIR:=$TMP}
2847 : ${TMPDIR:=/tmp}
2848
2849 if ! check_cmd mktemp -u XXXXXX; then
2850     # simple replacement for missing mktemp
2851     # NOT SAFE FOR GENERAL USE
2852     mktemp(){
2853         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2854     }
2855 fi
2856
2857 tmpfile(){
2858     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2859         (set -C; exec > $tmp) 2>/dev/null ||
2860         die "Unable to create temporary file in $TMPDIR."
2861     append TMPFILES $tmp
2862     eval $1=$tmp
2863 }
2864
2865 trap 'rm -f -- $TMPFILES' EXIT
2866
2867 tmpfile TMPASM .asm
2868 tmpfile TMPC   .c
2869 tmpfile TMPE   $EXESUF
2870 tmpfile TMPH   .h
2871 tmpfile TMPO   .o
2872 tmpfile TMPS   .S
2873 tmpfile TMPSH  .sh
2874 tmpfile TMPV   .ver
2875
2876 unset -f mktemp
2877
2878 chmod +x $TMPE
2879
2880 # make sure we can execute files in $TMPDIR
2881 cat > $TMPSH 2>> $logfile <<EOF
2882 #! /bin/sh
2883 EOF
2884 chmod +x $TMPSH >> $logfile 2>&1
2885 if ! $TMPSH >> $logfile 2>&1; then
2886     cat <<EOF
2887 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2888 variable to another directory and make sure that it is not mounted noexec.
2889 EOF
2890     die "Sanity test failed."
2891 fi
2892
2893 armasm_flags(){
2894     for flag; do
2895         case $flag in
2896             # Filter out MSVC cl.exe options from cflags that shouldn't
2897             # be passed to gas-preprocessor
2898             -M[TD]*)                                            ;;
2899             *)                  echo $flag                      ;;
2900         esac
2901    done
2902 }
2903
2904 ccc_flags(){
2905     for flag; do
2906         case $flag in
2907             -std=c99)           echo -c99                       ;;
2908             -mcpu=*)            echo -arch ${flag#*=}           ;;
2909             -mieee)             echo -ieee                      ;;
2910             -O*|-fast)          echo $flag                      ;;
2911             -fno-math-errno)    echo -assume nomath_errno       ;;
2912             -g)                 echo -g3                        ;;
2913             -Wall)              echo -msg_enable level2         ;;
2914             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2915             -Wl,*)              echo $flag                      ;;
2916             -f*|-W*)                                            ;;
2917             *)                  echo $flag                      ;;
2918         esac
2919    done
2920 }
2921
2922 cparser_flags(){
2923     for flag; do
2924         case $flag in
2925             -Wno-switch)             echo -Wno-switch-enum ;;
2926             -Wno-format-zero-length) ;;
2927             -Wdisabled-optimization) ;;
2928             -Wno-pointer-sign)       echo -Wno-other ;;
2929             *)                       echo $flag ;;
2930         esac
2931     done
2932 }
2933
2934 msvc_common_flags(){
2935     for flag; do
2936         case $flag in
2937             # In addition to specifying certain flags under the compiler
2938             # specific filters, they must be specified here as well or else the
2939             # generic catch all at the bottom will print the original flag.
2940             -Wall)                ;;
2941             -std=c99)             ;;
2942             # Common flags
2943             -fomit-frame-pointer) ;;
2944             -g)                   echo -Z7 ;;
2945             -fno-math-errno)      ;;
2946             -fno-common)          ;;
2947             -fno-signed-zeros)    ;;
2948             -fPIC)                ;;
2949             -mthumb)              ;;
2950             -march=*)             ;;
2951             -lz)                  echo zlib.lib ;;
2952             -lavifil32)           echo vfw32.lib ;;
2953             -lavicap32)           echo vfw32.lib user32.lib ;;
2954             -lx264)               echo libx264.lib ;;
2955             -l*)                  echo ${flag#-l}.lib ;;
2956             -L*)                  echo -libpath:${flag#-L} ;;
2957             *)                    echo $flag ;;
2958         esac
2959     done
2960 }
2961
2962 msvc_flags(){
2963     msvc_common_flags "$@"
2964     for flag; do
2965         case $flag in
2966             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
2967                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
2968                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
2969                                        -wd4273 -wd4554 -wd4701 ;;
2970         esac
2971     done
2972 }
2973
2974 icl_flags(){
2975     msvc_common_flags "$@"
2976     for flag; do
2977         case $flag in
2978             # Despite what Intel's documentation says -Wall, which is supported
2979             # on Windows, does enable remarks so disable them here.
2980             -Wall)                echo $flag -Qdiag-disable:remark ;;
2981             -std=c99)             echo -Qstd=c99 ;;
2982         esac
2983     done
2984 }
2985
2986 pgi_flags(){
2987     for flag; do
2988         case $flag in
2989             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
2990             -fomit-frame-pointer) echo -Mnoframe ;;
2991             -g)                   echo -gopt ;;
2992             *)                    echo $flag ;;
2993         esac
2994     done
2995 }
2996
2997 suncc_flags(){
2998     for flag; do
2999         case $flag in
3000             -march=*|-mcpu=*)
3001                 case "${flag#*=}" in
3002                     native)                   echo -xtarget=native       ;;
3003                     v9|niagara)               echo -xarch=sparc          ;;
3004                     ultrasparc)               echo -xarch=sparcvis       ;;
3005                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3006                     i586|pentium)             echo -xchip=pentium        ;;
3007                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3008                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3009                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3010                     pentium4*)          echo -xtarget=pentium4           ;;
3011                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3012                     *-sse3)             echo -xarch=sse3                 ;;
3013                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3014                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3015                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3016                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3017                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3018                     k8|opteron|athlon64|athlon-fx)
3019                                                echo -xarch=sse2a         ;;
3020                     athlon*)                   echo -xarch=pentium_proa  ;;
3021                 esac
3022                 ;;
3023             -std=c99)             echo -xc99              ;;
3024             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3025             -fPIC)                echo -KPIC -xcode=pic32 ;;
3026             -W*,*)                echo $flag              ;;
3027             -f*-*|-W*|-mimpure-text)                      ;;
3028             -shared)              echo -G                 ;;
3029             *)                    echo $flag              ;;
3030         esac
3031     done
3032 }
3033
3034 tms470_flags(){
3035     for flag; do
3036         case $flag in
3037             -march=*|-mcpu=*)
3038                 case "${flag#*=}" in
3039                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3040                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3041                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3042                     armv6*|arm11*)          echo -mv=6   ;;
3043                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3044                                             echo -mv=5e  ;;
3045                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3046                 esac
3047                 ;;
3048             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3049             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3050             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3051             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3052             -msoft-float)   echo --float_support=vfplib       ;;
3053             -O[0-3]|-mf=*)  echo $flag                        ;;
3054             -g)             echo -g -mn                       ;;
3055             -pds=*)         echo $flag                        ;;
3056             -D*|-I*)        echo $flag                        ;;
3057             --gcc|--abi=*)  echo $flag                        ;;
3058             -me)            echo $flag                        ;;
3059         esac
3060     done
3061 }
3062
3063 probe_cc(){
3064     pfx=$1
3065     _cc=$2
3066
3067     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3068     unset _ld_o _ldflags _ld_lib _ld_path
3069     unset _depflags _DEPCMD _DEPFLAGS
3070     _flags_filter=echo
3071
3072     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3073         _type=llvm_gcc
3074         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3075         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3076         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3077         _cflags_speed='-O3'
3078         _cflags_size='-Os'
3079     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3080         _type=gcc
3081         gcc_version=$($_cc --version | head -n1)
3082         gcc_basever=$($_cc -dumpversion)
3083         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3084         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3085         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3086         if ! $_cc -dumpversion | grep -q '^2\.'; then
3087             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3088         fi
3089         _cflags_speed='-O3'
3090         _cflags_size='-Os'
3091     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3092         _type=icc
3093         _ident=$($_cc --version | head -n1)
3094         _depflags='-MMD'
3095         _cflags_speed='-O3'
3096         _cflags_size='-Os'
3097         _cflags_noopt='-O1'
3098     elif $_cc -v 2>&1 | grep -q xlc; then
3099         _type=xlc
3100         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3101         _cflags_speed='-O5'
3102         _cflags_size='-O5 -qcompact'
3103     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3104         _type=ccc
3105         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3106         _DEPFLAGS='-M'
3107         _cflags_speed='-fast'
3108         _cflags_size='-O1'
3109         _flags_filter=ccc_flags
3110     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3111         test -d "$sysroot" || die "No valid sysroot specified."
3112         _type=armcc
3113         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3114         armcc_conf="$PWD/armcc.conf"
3115         $_cc --arm_linux_configure                 \
3116              --arm_linux_config_file="$armcc_conf" \
3117              --configure_sysroot="$sysroot"        \
3118              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3119              die "Error creating armcc configuration file."
3120         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3121         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3122         as_default="${cross_prefix}gcc"
3123         _depflags='-MMD'
3124         _cflags_speed='-O3'
3125         _cflags_size='-Os'
3126     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3127         _type=tms470
3128         _ident=$($_cc -version | head -n1 | tr -s ' ')
3129         _flags='--gcc --abi=eabi -me'
3130         _cc_e='-ppl -fe=$@'
3131         _cc_o='-fe=$@'
3132         _depflags='-ppa -ppd=$(@:.o=.d)'
3133         _cflags_speed='-O3 -mf=5'
3134         _cflags_size='-O3 -mf=2'
3135         _flags_filter=tms470_flags
3136     elif $_cc -v 2>&1 | grep -q clang; then
3137         _type=clang
3138         _ident=$($_cc --version 2>/dev/null | head -n1)
3139         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3140         _cflags_speed='-O3'
3141         _cflags_size='-Os'
3142     elif $_cc -V 2>&1 | grep -q Sun; then
3143         _type=suncc
3144         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3145         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3146         _DEPFLAGS='-xM1 -xc99'
3147         _ldflags='-std=c99'
3148         _cflags_speed='-O5'
3149         _cflags_size='-O5 -xspace'
3150         _flags_filter=suncc_flags
3151     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3152         _type=pathscale
3153         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3154         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3155         _cflags_speed='-O2'
3156         _cflags_size='-Os'
3157         _flags_filter='filter_out -Wdisabled-optimization'
3158     elif $_cc -v 2>&1 | grep -q Open64; then
3159         _type=open64
3160         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3161         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3162         _cflags_speed='-O2'
3163         _cflags_size='-Os'
3164         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3165     elif $_cc -V 2>&1 | grep -q Portland; then
3166         _type=pgi
3167         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3168         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3169         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3170         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3171         _cflags_noopt="-O1"
3172         _flags_filter=pgi_flags
3173     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3174         _type=armasm
3175         _ident=$($_cc | head -n1)
3176         # 4509: "This form of conditional instruction is deprecated"
3177         _flags="-nologo -ignore 4509"
3178         _flags_filter=armasm_flags
3179     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3180         _type=msvc
3181         _ident=$($_cc 2>&1 | head -n1)
3182         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3183         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3184         _cflags_speed="-O2"
3185         _cflags_size="-O1"
3186         if $_cc -nologo- 2>&1 | grep -q Linker; then
3187             _ld_o='-out:$@'
3188         else
3189             _ld_o='-Fe$@'
3190         fi
3191         _cc_o='-Fo$@'
3192         _cc_e='-P -Fi$@'
3193         _flags_filter=msvc_flags
3194         _ld_lib='lib%.a'
3195         _ld_path='-libpath:'
3196         _flags='-nologo'
3197         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS'
3198     elif $_cc 2>&1 | grep -q Intel; then
3199         _type=icl
3200         _ident=$($_cc 2>&1 | head -n1)
3201         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3202         # Not only is O3 broken on 13.x+ but it is slower on all previous
3203         # versions (tested) as well.
3204         _cflags_speed="-O2"
3205         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3206         if $_cc 2>&1 | grep -q Linker; then
3207             _ld_o='-out:$@'
3208         else
3209             _ld_o='-Fe$@'
3210         fi
3211         _cc_o='-Fo$@'
3212         _cc_e='-P'
3213         _flags_filter=icl_flags
3214         _ld_lib='lib%.a'
3215         _ld_path='-libpath:'
3216         # -Qdiag-error to make icl error when seeing certain unknown arguments
3217         _flags='-nologo -Qdiag-error:4044,10157'
3218         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3219         # with MSVC which enables it by default.
3220         _cflags='-D_USE_MATH_DEFINES -Qms0 -Qvec- -Qsimd- -GS'
3221     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3222         _type=cparser
3223         _ident=$($_cc --version | head -n1)
3224         _depflags='-MMD'
3225         _cflags_speed='-O4'
3226         _cflags_size='-O2'
3227         _flags_filter=cparser_flags
3228     fi
3229
3230     eval ${pfx}_type=\$_type
3231     eval ${pfx}_ident=\$_ident
3232 }
3233
3234 set_ccvars(){
3235     eval ${1}_C=\${_cc_c-\${${1}_C}}
3236     eval ${1}_E=\${_cc_e-\${${1}_E}}
3237     eval ${1}_O=\${_cc_o-\${${1}_O}}
3238
3239     if [ -n "$_depflags" ]; then
3240         eval ${1}_DEPFLAGS=\$_depflags
3241     else
3242         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3243         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3244         eval DEP${1}FLAGS=\$_flags
3245     fi
3246 }
3247
3248 probe_cc cc "$cc"
3249 cflags_filter=$_flags_filter
3250 cflags_speed=$_cflags_speed
3251 cflags_size=$_cflags_size
3252 cflags_noopt=$_cflags_noopt
3253 add_cflags $_flags $_cflags
3254 cc_ldflags=$_ldflags
3255 set_ccvars CC
3256
3257 probe_cc hostcc "$host_cc"
3258 host_cflags_filter=$_flags_filter
3259 add_host_cflags  $_flags $_cflags
3260 set_ccvars HOSTCC
3261
3262 test -n "$cc_type" && enable $cc_type ||
3263     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3264
3265 : ${as_default:=$cc}
3266 : ${objcc_default:=$cc}
3267 : ${dep_cc_default:=$cc}
3268 : ${ld_default:=$cc}
3269 : ${host_ld_default:=$host_cc}
3270 set_default ar as objcc dep_cc ld host_ld
3271
3272 probe_cc as "$as"
3273 asflags_filter=$_flags_filter
3274 add_asflags $_flags $_cflags
3275 set_ccvars AS
3276
3277 probe_cc objcc "$objcc"
3278 objcflags_filter=$_flags_filter
3279 add_objcflags $_flags $_cflags
3280 set_ccvars OBJC
3281
3282 probe_cc ld "$ld"
3283 ldflags_filter=$_flags_filter
3284 add_ldflags $_flags $_ldflags
3285 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3286 LD_O=${_ld_o-$LD_O}
3287 LD_LIB=${_ld_lib-$LD_LIB}
3288 LD_PATH=${_ld_path-$LD_PATH}
3289
3290 probe_cc hostld "$host_ld"
3291 host_ldflags_filter=$_flags_filter
3292 add_host_ldflags $_flags $_ldflags
3293 HOSTLD_O=${_ld_o-$HOSTLD_O}
3294
3295 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3296     probe_cc depcc "$dep_cc"
3297     CCDEP=${_DEPCMD:-$DEPCMD}
3298     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3299     DEPCCFLAGS=$_flags
3300 fi
3301
3302 if $ar 2>&1 | grep -q Microsoft; then
3303     arflags="-nologo"
3304     ar_o='-out:$@'
3305 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3306     arflags="rq"
3307     ar_o='$@'
3308 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3309     arflags='-Xany -r -c'
3310     ar_o='$@'
3311 else
3312     arflags="rc"
3313     ar_o='$@'
3314 fi
3315
3316 add_cflags $extra_cflags
3317 add_objcflags $extra_objcflags
3318 add_asflags $extra_cflags
3319
3320 if test -n "$sysroot"; then
3321     case "$cc_type" in
3322         gcc|llvm_gcc|clang)
3323             add_cppflags --sysroot="$sysroot"
3324             add_ldflags --sysroot="$sysroot"
3325         ;;
3326         tms470)
3327             add_cppflags -I"$sysinclude"
3328             add_ldflags  --sysroot="$sysroot"
3329         ;;
3330     esac
3331 fi
3332
3333 if test "$cpu" = host; then
3334     enabled cross_compile &&
3335         die "--cpu=host makes no sense when cross-compiling."
3336
3337     case "$cc_type" in
3338         gcc|llvm_gcc)
3339             check_native(){
3340                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3341                 sed -n "/cc1.*$1=/{
3342                             s/.*$1=\\([^ ]*\\).*/\\1/
3343                             p
3344                             q
3345                         }" $TMPE
3346             }
3347             cpu=$(check_native -march || check_native -mcpu)
3348         ;;
3349     esac
3350
3351     test "${cpu:-host}" = host &&
3352         die "--cpu=host not supported with compiler $cc"
3353 fi
3354
3355 # Deal with common $arch aliases
3356 case "$arch" in
3357     aarch64|arm64)
3358         arch="aarch64"
3359     ;;
3360     arm*)
3361         arch="arm"
3362     ;;
3363     mips*|IP*)
3364         case "$arch" in
3365         *el)
3366             add_cppflags -EL
3367             add_ldflags -EL
3368         ;;
3369         *eb)
3370             add_cppflags -EB
3371             add_ldflags -EB
3372         ;;
3373         esac
3374         arch="mips"
3375     ;;
3376     parisc*|hppa*)
3377         arch="parisc"
3378     ;;
3379     "Power Macintosh"|ppc*|powerpc*)
3380         arch="ppc"
3381     ;;
3382     s390|s390x)
3383         arch="s390"
3384     ;;
3385     sh4|sh)
3386         arch="sh4"
3387     ;;
3388     sun4u|sparc*)
3389         arch="sparc"
3390     ;;
3391     tilegx|tile-gx)
3392         arch="tilegx"
3393     ;;
3394     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3395         arch="x86"
3396     ;;
3397 esac
3398
3399 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3400 enable $arch
3401
3402 # Add processor-specific flags
3403 if enabled aarch64; then
3404
3405     case $cpu in
3406         armv*)
3407             cpuflags="-march=$cpu"
3408         ;;
3409         *)
3410             cpuflags="-mcpu=$cpu"
3411         ;;
3412     esac
3413
3414 elif enabled alpha; then
3415
3416     cpuflags="-mcpu=$cpu"
3417
3418 elif enabled arm; then
3419
3420     check_arm_arch() {
3421         check_cpp_condition stddef.h \
3422             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3423             $cpuflags
3424     }
3425
3426     probe_arm_arch() {
3427         if   check_arm_arch 4;        then echo armv4;
3428         elif check_arm_arch 4T;       then echo armv4t;
3429         elif check_arm_arch 5;        then echo armv5;
3430         elif check_arm_arch 5E;       then echo armv5e;
3431         elif check_arm_arch 5T;       then echo armv5t;
3432         elif check_arm_arch 5TE;      then echo armv5te;
3433         elif check_arm_arch 5TEJ;     then echo armv5te;
3434         elif check_arm_arch 6;        then echo armv6;
3435         elif check_arm_arch 6J;       then echo armv6j;
3436         elif check_arm_arch 6K;       then echo armv6k;
3437         elif check_arm_arch 6Z;       then echo armv6z;
3438         elif check_arm_arch 6ZK;      then echo armv6zk;
3439         elif check_arm_arch 6T2;      then echo armv6t2;
3440         elif check_arm_arch 7;        then echo armv7;
3441         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3442         elif check_arm_arch 7S;       then echo armv7-a;
3443         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3444         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3445         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3446         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3447         fi
3448     }
3449
3450     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3451
3452     case $cpu in
3453         armv*)
3454             cpuflags="-march=$cpu"
3455             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3456         ;;
3457         *)
3458             cpuflags="-mcpu=$cpu"
3459             case $cpu in
3460                 cortex-a*)                               subarch=armv7a  ;;
3461                 cortex-r*)                               subarch=armv7r  ;;
3462                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3463                 arm11*)                                  subarch=armv6   ;;
3464                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3465                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3466                 *)                             subarch=$(probe_arm_arch) ;;
3467             esac
3468         ;;
3469     esac
3470
3471     case "$subarch" in
3472         armv5t*)    enable fast_clz                ;;
3473         armv[6-8]*) enable fast_clz fast_unaligned ;;
3474     esac
3475
3476 elif enabled avr32; then
3477
3478     case $cpu in
3479         ap7[02]0[0-2])
3480             subarch="avr32_ap"
3481             cpuflags="-mpart=$cpu"
3482         ;;
3483         ap)
3484             subarch="avr32_ap"
3485             cpuflags="-march=$cpu"
3486         ;;
3487         uc3[ab]*)
3488             subarch="avr32_uc"
3489             cpuflags="-mcpu=$cpu"
3490         ;;
3491         uc)
3492             subarch="avr32_uc"
3493             cpuflags="-march=$cpu"
3494         ;;
3495     esac
3496
3497 elif enabled bfin; then
3498
3499     cpuflags="-mcpu=$cpu"
3500
3501 elif enabled mips; then
3502
3503     cpuflags="-march=$cpu"
3504
3505 elif enabled ppc; then
3506
3507     disable ldbrx
3508
3509     case $(tolower $cpu) in
3510         601|ppc601|powerpc601)
3511             cpuflags="-mcpu=601"
3512             disable altivec
3513         ;;
3514         603*|ppc603*|powerpc603*)
3515             cpuflags="-mcpu=603"
3516             disable altivec
3517         ;;
3518         604*|ppc604*|powerpc604*)
3519             cpuflags="-mcpu=604"
3520             disable altivec
3521         ;;
3522         g3|75*|ppc75*|powerpc75*)
3523             cpuflags="-mcpu=750"
3524             disable altivec
3525         ;;
3526         g4|745*|ppc745*|powerpc745*)
3527             cpuflags="-mcpu=7450"
3528             disable vsx
3529         ;;
3530         74*|ppc74*|powerpc74*)
3531             cpuflags="-mcpu=7400"
3532             disable vsx
3533         ;;
3534         g5|970|ppc970|powerpc970)
3535             cpuflags="-mcpu=970"
3536             disable vsx
3537         ;;
3538         power[3-6]*)
3539             cpuflags="-mcpu=$cpu"
3540             disable vsx
3541         ;;
3542         power[7-8]*)
3543             cpuflags="-mcpu=$cpu"
3544             enable ldbrx
3545         ;;
3546         cell)
3547             cpuflags="-mcpu=cell"
3548             enable ldbrx
3549             disable vsx
3550         ;;
3551         e500mc)
3552             cpuflags="-mcpu=e500mc"
3553             disable altivec
3554         ;;
3555         e500v2)
3556             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3557             disable altivec
3558             disable dcbzl
3559         ;;
3560         e500)
3561             cpuflags="-mcpu=8540 -mhard-float"
3562             disable altivec
3563             disable dcbzl
3564         ;;
3565     esac
3566
3567 elif enabled sparc; then
3568
3569     case $cpu in
3570         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3571             cpuflags="-mcpu=$cpu"
3572         ;;
3573         ultrasparc*|niagara[234])
3574             cpuflags="-mcpu=$cpu"
3575         ;;
3576     esac
3577
3578 elif enabled x86; then
3579
3580     case $cpu in
3581         i[345]86|pentium)
3582             cpuflags="-march=$cpu"
3583             disable i686
3584             disable mmx
3585         ;;
3586         # targets that do NOT support nopl and conditional mov (cmov)
3587         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3588             cpuflags="-march=$cpu"
3589             disable i686
3590         ;;
3591         # targets that do support nopl and conditional mov (cmov)
3592         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3593             cpuflags="-march=$cpu"
3594             enable i686
3595             enable fast_cmov
3596         ;;
3597         # targets that do support conditional mov but on which it's slow
3598         pentium4|pentium4m|prescott|nocona)
3599             cpuflags="-march=$cpu"
3600             enable i686
3601             disable fast_cmov
3602         ;;
3603     esac
3604
3605 fi
3606
3607 if [ "$cpu" != generic ]; then
3608     add_cflags  $cpuflags
3609     add_asflags $cpuflags
3610     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3611 fi
3612
3613 # compiler sanity check
3614 check_exec <<EOF
3615 int main(void){ return 0; }
3616 EOF
3617 if test "$?" != 0; then
3618     echo "$cc is unable to create an executable file."
3619     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3620         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3621         echo "Only do this if you know what cross compiling means."
3622     fi
3623     die "C compiler test failed."
3624 fi
3625
3626 add_cppflags -D_ISOC99_SOURCE
3627 check_cflags -std=c99
3628 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3629 #include <stdlib.h>
3630 EOF
3631 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3632 #include <stdlib.h>
3633 EOF
3634
3635 add_host_cppflags -D_ISOC99_SOURCE
3636 check_host_cflags -std=c99
3637 check_host_cflags -Wall
3638 check_host_cflags -O3
3639
3640 check_64bit(){
3641     arch32=$1
3642     arch64=$2
3643     expr=$3
3644     check_code cc "" "int test[2*($expr) - 1]" &&
3645         subarch=$arch64 || subarch=$arch32
3646 }
3647
3648 case "$arch" in
3649     aarch64|alpha|ia64)
3650         spic=$shared
3651     ;;
3652     mips)
3653         check_64bit mips mips64 '_MIPS_SIM > 1'
3654         spic=$shared
3655     ;;
3656     parisc)
3657         check_64bit parisc parisc64 'sizeof(void *) > 4'
3658         spic=$shared
3659     ;;
3660     ppc)
3661         check_64bit ppc ppc64 'sizeof(void *) > 4'
3662         spic=$shared
3663     ;;
3664     s390)
3665         check_64bit s390 s390x 'sizeof(void *) > 4'
3666         spic=$shared
3667     ;;
3668     sparc)
3669         check_64bit sparc sparc64 'sizeof(void *) > 4'
3670         spic=$shared
3671     ;;
3672     x86)
3673         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3674         if test "$subarch" = "x86_64"; then
3675             spic=$shared
3676         fi
3677     ;;
3678 esac
3679
3680 enable $subarch
3681 enabled spic && enable_weak pic
3682
3683 # OS specific
3684 case $target_os in
3685     aix)
3686         SHFLAGS=-shared
3687         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3688         enabled shared && add_ldflags -Wl,-brtl
3689         ;;
3690     android)
3691         disable symver
3692         enable section_data_rel_ro
3693         SLIB_INSTALL_NAME='$(SLIBNAME)'
3694         SLIB_INSTALL_LINKS=
3695         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3696         ;;
3697     haiku)
3698         prefix_default="/boot/common"
3699         network_extralibs="-lnetwork"
3700         host_libs=
3701         ;;
3702     sunos)
3703         SHFLAGS='-shared -Wl,-h,$$(@F)'
3704         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3705         network_extralibs="-lsocket -lnsl"
3706         # When using suncc to build, the Solaris linker will mark
3707         # an executable with each instruction set encountered by
3708         # the Solaris assembler.  As our libraries contain their own
3709         # guards for processor-specific code, instead suppress
3710         # generation of the HWCAPS ELF section on Solaris x86 only.
3711         enabled_all suncc x86 &&
3712             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3713             add_ldflags -Wl,-M,mapfile
3714         nm_default='nm -P -g'
3715         SLIB_CREATE_DEF_CMD='$(Q)perl $(SRC_PATH)/compat/solaris/make_sunver.pl $$(filter %.ver,$$^) $(OBJS) | grep -v @ > $(SUBDIR)lib$(NAME).ver-sol2'
3716         ;;
3717     netbsd)
3718         disable symver
3719         oss_indev_extralibs="-lossaudio"
3720         oss_outdev_extralibs="-lossaudio"
3721         ;;
3722     openbsd|bitrig)
3723         disable symver
3724         SHFLAGS='-shared'
3725         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3726         SLIB_INSTALL_LINKS=
3727         oss_indev_extralibs="-lossaudio"
3728         oss_outdev_extralibs="-lossaudio"
3729         ;;
3730     dragonfly)
3731         disable symver
3732         ;;
3733     freebsd)
3734         ;;
3735     bsd/os)
3736         add_extralibs -lpoll -lgnugetopt
3737         ;;
3738     darwin)
3739         enabled ppc && add_asflags -force_cpusubtype_ALL
3740         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3741         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3742         add_ldflags -Wl,-dynamic,-search_paths_first
3743         SLIBSUF=".dylib"
3744         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3745         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3746         objformat="macho"
3747         enabled x86_64 && objformat="macho64"
3748         enabled_any pic shared ||
3749             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3750         ;;
3751     msys*)
3752         die "Native MSYS builds are discouraged, please use the MINGW environment.";
3753         ;;
3754     mingw32*|mingw64*)
3755         if test $target_os = "mingw32ce"; then
3756             disable network
3757         else
3758             target_os=mingw32
3759         fi
3760         LIBTARGET=i386
3761         if enabled x86_64; then
3762             LIBTARGET="i386:x86-64"
3763         elif enabled arm; then
3764             LIBTARGET=arm-wince
3765         fi
3766         check_ldflags -Wl,--nxcompat
3767         check_ldflags -Wl,--dynamicbase
3768         shlibdir_default="$bindir_default"
3769         SLIBPREF=""
3770         SLIBSUF=".dll"
3771         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3772         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3773         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3774         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3775         SLIB_INSTALL_LINKS=
3776         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3777         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3778         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3779         objformat="win32"
3780         dlltool="${cross_prefix}dlltool"
3781         ranlib=:
3782         enable dos_paths
3783         ;;
3784     win32|win64)
3785         disable symver
3786         if enabled shared; then
3787             # Link to the import library instead of the normal static library
3788             # for shared libs.
3789             LD_LIB='%.lib'
3790             # Cannot build both shared and static libs with MSVC or icl.
3791             disable static
3792         fi
3793         shlibdir_default="$bindir_default"
3794         SLIBPREF=""
3795         SLIBSUF=".dll"
3796         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3797         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3798         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3799         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3800         SLIB_INSTALL_LINKS=
3801         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3802         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3803         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3804         objformat="win32"
3805         ranlib=:
3806         enable dos_paths
3807         ;;
3808     cygwin*)
3809         target_os=cygwin
3810         shlibdir_default="$bindir_default"
3811         SLIBPREF="cyg"
3812         SLIBSUF=".dll"
3813         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3814         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3815         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3816         SLIB_INSTALL_LINKS=
3817         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3818         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3819         objformat="win32"
3820         enable dos_paths
3821         ;;
3822     *-dos|freedos|opendos)
3823         network_extralibs="-lsocket"
3824         objformat="coff"
3825         enable dos_paths
3826         add_cppflags -U__STRICT_ANSI__
3827         ;;
3828     linux)
3829         enable dv1394
3830         enable section_data_rel_ro
3831         ;;
3832     irix*)
3833         target_os=irix
3834         ranlib="echo ignoring ranlib"
3835         ;;
3836     os/2*)
3837         ln_s="cp -f"
3838         objformat="aout"
3839         add_cppflags -D_GNU_SOURCE
3840         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3841         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3842         LIBSUF="_s.a"
3843         SLIBPREF=""
3844         SLIBSUF=".dll"
3845         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3846         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3847         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3848             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3849             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3850             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3851             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3852         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3853             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3854         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3855         enable dos_paths
3856         ;;
3857     gnu/kfreebsd)
3858         add_cppflags -D_BSD_SOURCE
3859         ;;
3860     gnu)
3861         ;;
3862     qnx)
3863         add_cppflags -D_QNX_SOURCE
3864         network_extralibs="-lsocket"
3865         ;;
3866     symbian)
3867         SLIBSUF=".dll"
3868         enable dos_paths
3869         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3870         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3871         add_ldflags -Wl,--target1-abs,--no-undefined \
3872                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3873                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3874         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3875                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3876                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3877         ;;
3878     osf1)
3879         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3880         ;;
3881     minix)
3882         ;;
3883     plan9)
3884         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3885                      -D_REENTRANT_SOURCE        \
3886                      -D_RESEARCH_SOURCE         \
3887                      -DFD_SETSIZE=96            \
3888                      -DHAVE_SOCK_OPTS
3889         add_compat strtod.o strtod=avpriv_strtod
3890         network_extralibs='-lbsd'
3891         exeobjs=compat/plan9/main.o
3892         cp_f='cp'
3893         ;;
3894     none)
3895         ;;
3896     *)
3897         die "Unknown OS '$target_os'."
3898         ;;
3899 esac
3900
3901 # determine libc flavour
3902
3903 probe_libc(){
3904     pfx=$1
3905     pfx_no_=${pfx%_}
3906     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3907     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3908         eval ${pfx}libc_type=uclibc
3909         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3910     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3911         eval ${pfx}libc_type=glibc
3912         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3913     # MinGW headers can be installed on Cygwin, so check for newlib first.
3914     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3915         eval ${pfx}libc_type=newlib
3916         add_${pfx}cppflags -U__STRICT_ANSI__
3917     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3918     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3919         eval ${pfx}libc_type=mingw64
3920         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3921         eval test \$${pfx_no_}cc_type = "gcc" &&
3922             add_${pfx}cppflags -D__printf__=__gnu_printf__
3923     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3924          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3925         eval ${pfx}libc_type=mingw32
3926         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3927             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3928             die "ERROR: MinGW32 runtime version must be >= 3.15."
3929         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3930         eval test \$${pfx_no_}cc_type = "gcc" &&
3931             add_${pfx}cppflags -D__printf__=__gnu_printf__
3932     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3933         eval ${pfx}libc_type=msvcrt
3934         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
3935             if [ "$pfx" = host_ ]; then
3936                 add_host_cppflags -Dsnprintf=_snprintf
3937             else
3938                 add_compat strtod.o strtod=avpriv_strtod
3939                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3940                                              _snprintf=avpriv_snprintf  \
3941                                              vsnprintf=avpriv_vsnprintf
3942             fi
3943         fi
3944         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3945         # 0x601 by default unless something else is set by the user.
3946         # This can easily lead to us detecting functions only present
3947         # in such new versions and producing binaries requiring windows 7.0.
3948         # Therefore explicitly set the default to XP unless the user has
3949         # set something else on the command line.
3950         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
3951         # family. For these cases, configure is free to use any functions
3952         # found in the SDK headers by default. (Alternatively, we could force
3953         # _WIN32_WINNT to 0x0602 in that case.)
3954         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
3955             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
3956 #ifdef WINAPI_FAMILY
3957 #include <winapifamily.h>
3958 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
3959 #error not desktop
3960 #endif
3961 #endif
3962 EOF
3963     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
3964         eval ${pfx}libc_type=klibc
3965     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
3966         eval ${pfx}libc_type=bionic
3967     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
3968         eval ${pfx}libc_type=solaris
3969         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
3970     else
3971         eval ${pfx}libc_type=default
3972         add_${pfx}cppflags -D_DEFAULT_SOURCE
3973     fi
3974 }
3975
3976 probe_libc
3977 test -n "$libc_type" && enable libc_$libc_type
3978 probe_libc host_
3979 test -n "$host_libc_type" && enable host_libc_$host_libc_type
3980
3981 case $libc_type in
3982     bionic)
3983         add_compat strtod.o strtod=avpriv_strtod
3984         ;;
3985 esac
3986
3987 # hacks for compiler/libc/os combinations
3988
3989 if enabled_all tms470 libc_glibc; then
3990     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
3991     add_cppflags -D__USER_LABEL_PREFIX__=
3992     add_cppflags -D__builtin_memset=memset
3993     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
3994     add_cflags   -pds=48    # incompatible redefinition of macro
3995 fi
3996
3997 if enabled_all ccc libc_glibc; then
3998     add_ldflags -Wl,-z,now  # calls to libots crash without this
3999 fi
4000
4001 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4002     add_cppflags '-I\$(SRC_PATH)/compat/float'
4003
4004 esc(){
4005     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4006 }
4007
4008 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
4009
4010 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4011
4012 set_default $PATHS_LIST
4013 set_default nm
4014
4015 # we need to build at least one lib type
4016 if ! enabled_any static shared; then
4017     cat <<EOF
4018 At least one library type must be built.
4019 Specify --enable-static to build the static libraries or --enable-shared to
4020 build the shared libraries as well. To only build the shared libraries specify
4021 --disable-static in addition to --enable-shared.
4022 EOF
4023     exit 1;
4024 fi
4025
4026 die_license_disabled() {
4027     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
4028 }
4029
4030 die_license_disabled gpl libcdio
4031 die_license_disabled gpl libx264
4032 die_license_disabled gpl libx265
4033 die_license_disabled gpl libxavs
4034 die_license_disabled gpl libxvid
4035 die_license_disabled gpl x11grab
4036
4037 die_license_disabled nonfree libfaac
4038 die_license_disabled nonfree libfdk_aac
4039 die_license_disabled nonfree nvenc
4040 die_license_disabled nonfree openssl
4041
4042 die_license_disabled version3 libopencore_amrnb
4043 die_license_disabled version3 libopencore_amrwb
4044 die_license_disabled version3 libvo_aacenc
4045 die_license_disabled version3 libvo_amrwbenc
4046
4047 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
4048
4049 disabled optimizations || check_cflags -fomit-frame-pointer
4050
4051 enable_weak_pic() {
4052     disabled pic && return
4053     enable pic
4054     add_cppflags -DPIC
4055     case "$target_os" in
4056     mingw*|cygwin*)
4057         ;;
4058     *)
4059         add_cflags -fPIC
4060         ;;
4061     esac
4062     add_asflags  -fPIC
4063 }
4064
4065 enabled pic && enable_weak_pic
4066
4067 check_cc <<EOF || die "Symbol mangling check failed."
4068 int ff_extern;
4069 EOF
4070 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4071 extern_prefix=${sym%%ff_extern*}
4072
4073 check_cc <<EOF && enable_weak inline_asm
4074 void foo(void) { __asm__ volatile ("" ::); }
4075 EOF
4076
4077 _restrict=
4078 for restrict_keyword in restrict __restrict__ __restrict; do
4079     check_cc <<EOF && _restrict=$restrict_keyword && break
4080 void foo(char * $restrict_keyword p);
4081 EOF
4082 done
4083
4084 check_cc <<EOF && enable pragma_deprecated
4085 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4086 EOF
4087
4088 check_cc <<EOF && enable attribute_packed
4089 struct { int x; } __attribute__((packed)) x;
4090 EOF
4091
4092 check_cc <<EOF && enable attribute_may_alias
4093 union { int x; } __attribute__((may_alias)) x;
4094 EOF
4095
4096 check_cc <<EOF || die "endian test failed"
4097 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4098 EOF
4099 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4100
4101 check_gas() {
4102     log "check_gas using '$as' as AS"
4103     # :vararg is used on aarch64, arm and ppc altivec
4104     check_as <<EOF || return 1
4105 .macro m n, y:vararg=0
4106 \n: .int \y
4107 .endm
4108 m x
4109 EOF
4110     # .altmacro is only used in arm asm
4111     ! enabled arm || check_as <<EOF || return 1
4112 .altmacro
4113 EOF
4114     enable gnu_as
4115     return 0
4116 }
4117
4118 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4119     nogas=:
4120     enabled_any arm aarch64 && nogas=die
4121     enabled_all ppc altivec && nogas=warn
4122     as_noop=-v
4123
4124     case $as_type in
4125         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4126         gcc)  gaspp_as_type=gas ;;
4127         *)    gaspp_as_type=$as_type ;;
4128     esac
4129
4130     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4131
4132     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4133         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4134
4135     if ! check_gas ; then
4136         as=${gas:=$as}
4137         check_gas || \
4138             $nogas "GNU assembler not found, install/update gas-preprocessor"
4139     fi
4140
4141     check_as <<EOF && enable as_func
4142 .func test
4143 .endfunc
4144 EOF
4145 fi
4146
4147 check_inline_asm inline_asm_labels '"1:\n"'
4148
4149 if enabled aarch64; then
4150     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4151     # internal assembler in clang 3.3 does not support this instruction
4152     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4153     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4154
4155     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4156
4157 elif enabled alpha; then
4158
4159     check_cflags -mieee
4160
4161 elif enabled arm; then
4162
4163     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4164     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4165     enabled thumb && check_cflags -mthumb || check_cflags -marm
4166
4167     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4168         enable vfp_args
4169     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4170         enable vfp_args
4171     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4172         case "${cross_prefix:-$cc}" in
4173             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4174             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4175 __asm__ (".eabi_attribute 28, 1");
4176 int main(void) { return 0; }
4177 EOF
4178         esac
4179         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4180     fi
4181
4182     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4183     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4184     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4185     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4186     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4187     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4188
4189     [ $target_os = linux ] || [ $target_os = android ] ||
4190         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4191             $ARCH_EXT_LIST_ARM
4192
4193     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4194
4195     check_as <<EOF && enable as_dn_directive
4196 ra .dn d0.i16
4197 .unreq ra
4198 EOF
4199
4200     # llvm's integrated assembler supports .object_arch from llvm 3.5
4201     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4202 .object_arch armv4
4203 EOF
4204
4205     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4206
4207 elif enabled mips; then
4208
4209     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4210
4211     # make sure that only an instruction set is enabled
4212     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4213
4214     if enabled mips64; then
4215         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4216             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4217                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4218     else
4219         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4220             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4221                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4222     fi
4223
4224 elif enabled parisc; then
4225
4226     if enabled gcc; then
4227         case $($cc -dumpversion) in
4228             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4229         esac
4230     fi
4231
4232 elif enabled ppc; then
4233
4234     enable local_aligned_8 local_aligned_16
4235
4236     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4237     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4238     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4239     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4240
4241     # AltiVec flags: The FSF version of GCC differs from the Apple version
4242     if enabled altivec; then
4243         check_cflags -maltivec -mabi=altivec &&
4244         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4245         check_cflags -faltivec
4246
4247         # check if our compiler supports Motorola AltiVec C API
4248         check_cc <<EOF || disable altivec
4249 $inc_altivec_h
4250 int main(void) {
4251     vector signed int v1 = (vector signed int) { 0 };
4252     vector signed int v2 = (vector signed int) { 1 };
4253     v1 = vec_add(v1, v2);
4254     return 0;
4255 }
4256 EOF
4257
4258         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4259     fi
4260
4261     if enabled vsx; then
4262         check_cflags -mvsx &&
4263         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4264     fi
4265
4266     if enabled power8; then
4267         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4268     fi
4269
4270 elif enabled x86; then
4271
4272     check_builtin rdtsc    intrin.h   "__rdtsc()"
4273     check_builtin mm_empty mmintrin.h "_mm_empty()"
4274
4275     enable local_aligned_8 local_aligned_16
4276
4277     # check whether EBP is available on x86
4278     # As 'i' is stored on the stack, this program will crash
4279     # if the base pointer is used to access it because the
4280     # base pointer is cleared in the inline assembly code.
4281     check_exec_crash <<EOF && enable ebp_available
4282 volatile int i=0;
4283 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4284 return i;
4285 EOF
4286
4287     # check whether EBX is available on x86
4288     check_inline_asm ebx_available '""::"b"(0)' &&
4289         check_inline_asm ebx_available '"":::"%ebx"'
4290
4291     # check whether xmm clobbers are supported
4292     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4293
4294     # check whether binutils is new enough to compile SSSE3/MMXEXT
4295     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4296     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4297
4298     if ! disabled_any asm mmx yasm; then
4299         if check_cmd $yasmexe --version; then
4300             enabled x86_64 && yasm_extra="-m amd64"
4301             yasm_debug="-g dwarf2"
4302         elif check_cmd nasm -v; then
4303             yasmexe=nasm
4304             yasm_debug="-g -F dwarf"
4305             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4306         fi
4307
4308         YASMFLAGS="-f $objformat $yasm_extra"
4309         enabled pic               && append YASMFLAGS "-DPIC"
4310         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4311         case "$objformat" in
4312             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4313         esac
4314
4315         check_yasm "movbe ecx, [5]" && enable yasm ||
4316             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4317         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4318         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4319         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4320         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4321         check_yasm "CPU amdnop" || disable cpunop
4322     fi
4323
4324     case "$cpu" in
4325         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4326             disable fast_clz
4327         ;;
4328     esac
4329
4330 fi
4331
4332 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4333
4334 check_ldflags -Wl,--as-needed
4335
4336 if check_func dlopen; then
4337     ldl=
4338 elif check_func dlopen -ldl; then
4339     ldl=-ldl
4340 fi
4341
4342 if ! disabled network; then
4343     check_func getaddrinfo $network_extralibs
4344     check_func inet_aton $network_extralibs
4345
4346     check_type netdb.h "struct addrinfo"
4347     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4348     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4349     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4350     check_type poll.h "struct pollfd"
4351     check_type netinet/sctp.h "struct sctp_event_subscribe"
4352     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4353     check_type netinet/in.h "struct sockaddr_in6"
4354     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4355     check_type "sys/types.h sys/socket.h" socklen_t
4356
4357     # Prefer arpa/inet.h over winsock2
4358     if check_header arpa/inet.h ; then
4359         check_func closesocket
4360     elif check_header winsock2.h ; then
4361         check_func_headers winsock2.h closesocket -lws2 &&
4362             network_extralibs="-lws2" ||
4363         { check_func_headers winsock2.h closesocket -lws2_32 &&
4364             network_extralibs="-lws2_32"; } || disable winsock2_h network
4365         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4366
4367         check_type ws2tcpip.h socklen_t
4368         check_type ws2tcpip.h "struct addrinfo"
4369         check_type ws2tcpip.h "struct group_source_req"
4370         check_type ws2tcpip.h "struct ip_mreq_source"
4371         check_type ws2tcpip.h "struct ipv6_mreq"
4372         check_type winsock2.h "struct pollfd"
4373         check_struct winsock2.h "struct sockaddr" sa_len
4374         check_type ws2tcpip.h "struct sockaddr_in6"
4375         check_type ws2tcpip.h "struct sockaddr_storage"
4376     else
4377         disable network
4378     fi
4379 fi
4380
4381 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4382 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4383 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4384 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4385
4386 case "$custom_allocator" in
4387     jemalloc)
4388         # jemalloc by default does not use a prefix
4389         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4390     ;;
4391     tcmalloc)
4392         require_pkg_config libtcmalloc gperftools/tcmalloc.h tc_malloc
4393         malloc_prefix=tc_
4394     ;;
4395 esac
4396
4397 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4398 check_func  ${malloc_prefix}memalign            && enable memalign
4399 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4400
4401 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4402     check_func_headers time.h clock_gettime || { check_func_headers time.h clock_gettime -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
4403
4404 check_func  fcntl
4405 check_func  fork
4406 check_func  gethrtime
4407 check_func  getopt
4408 check_func  getrusage
4409 check_func  gettimeofday
4410 check_func  gmtime_r
4411 check_func  isatty
4412 check_func  localtime_r
4413 check_func  mach_absolute_time
4414 check_func  mkstemp
4415 check_func  mmap
4416 check_func  mprotect
4417 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4418 check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt; }
4419 check_func  sched_getaffinity
4420 check_func  setrlimit
4421 check_func  strerror_r
4422 check_func  sysconf
4423 check_func  sysctl
4424 check_func  usleep
4425
4426 check_func_headers io.h setmode
4427 check_func_headers stdlib.h getenv
4428
4429 check_func_headers windows.h CoTaskMemFree -lole32
4430 check_func_headers windows.h GetProcessAffinityMask
4431 check_func_headers windows.h GetProcessTimes
4432 check_func_headers windows.h GetSystemTimeAsFileTime
4433 check_func_headers windows.h LoadLibrary
4434 check_func_headers windows.h MapViewOfFile
4435 check_func_headers windows.h SetConsoleTextAttribute
4436 check_func_headers windows.h Sleep
4437 check_func_headers windows.h VirtualAlloc
4438 check_struct windows.h "CONDITION_VARIABLE" Ptr
4439
4440 check_header direct.h
4441 check_header dlfcn.h
4442 check_header d3d11.h
4443 check_header dxva.h
4444 check_header dxva2api.h
4445 check_header io.h
4446 check_header mach/mach_time.h
4447 check_header malloc.h
4448 check_header poll.h
4449 check_header sys/mman.h
4450 check_header sys/param.h
4451 check_header sys/resource.h
4452 check_header sys/select.h
4453 check_header sys/time.h
4454 check_header sys/un.h
4455 check_header unistd.h
4456 check_header valgrind/valgrind.h
4457 check_header vdpau/vdpau.h
4458 check_header vdpau/vdpau_x11.h
4459 check_header VideoDecodeAcceleration/VDADecoder.h
4460 check_header windows.h
4461 check_header X11/extensions/XvMClib.h
4462
4463 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
4464 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
4465 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
4466
4467 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4468
4469 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4470 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4471 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4472
4473 if ! disabled w32threads && ! enabled pthreads; then
4474     check_func_headers "windows.h process.h" _beginthreadex &&
4475         enable w32threads || disable w32threads
4476 fi
4477
4478 # check for some common methods of building with pthread support
4479 # do this before the optional library checks as some of them require pthreads
4480 if ! disabled pthreads && ! enabled w32threads; then
4481     enable pthreads
4482     if check_func pthread_join -pthread; then
4483         add_cflags -pthread
4484         add_extralibs -pthread
4485     elif check_func pthread_join -pthreads; then
4486         add_cflags -pthreads
4487         add_extralibs -pthreads
4488     elif check_func pthread_join -lpthreadGC2; then
4489         add_extralibs -lpthreadGC2
4490     elif check_lib pthread.h pthread_join -lpthread; then
4491         :
4492     elif ! check_func pthread_join; then
4493         disable pthreads
4494     fi
4495 fi
4496
4497 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
4498 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4499
4500 check_lib math.h sin -lm && LIBM="-lm"
4501 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4502
4503 atan2f_args=2
4504 ldexpf_args=2
4505 powf_args=2
4506
4507 for func in $MATH_FUNCS; do
4508     eval check_mathfunc $func \${${func}_args:-1}
4509 done
4510
4511 # these are off by default, so fail if requested and not available
4512 enabled avisynth          && { check_lib2 "avisynth/avisynth_c.h windows.h" LoadLibrary ||
4513                                check_lib2 "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl   ||
4514                                die "ERROR: LoadLibrary/dlopen not found, or avisynth header not found"; }
4515 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4516 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4517 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4518 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4519 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4520 enabled libfdk_aac        && require_pkg_config fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4521 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4522 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4523 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4524                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4525                                done || die "ERROR: libgsm not found"; }
4526 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4527 enabled libkvazaar        && require_pkg_config "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4528 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
4529 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4530 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4531 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4532 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4533 enabled libopenh264       && require_pkg_config openh264 wels/codec_api.h WelsGetCodecVersion
4534 enabled libopenjpeg       && { { check_header openjpeg.h && check_lib2 openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC; } ||
4535                                { require_pkg_config libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; } }
4536 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4537 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4538 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4539 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4540 enabled libsnappy         && require snappy snappy-c.h snappy_compress -lsnappy
4541 enabled libspeex          && require_pkg_config speex speex/speex.h speex_decoder_init -lspeex
4542 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4543 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4544 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4545 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4546 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4547 enabled libvpx            && require_pkg_config "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4548     enabled libvpx_vp8_decoder && {
4549         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4550             disable libvpx_vp8_decoder;
4551     }
4552     enabled libvpx_vp8_encoder && {
4553         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4554             disable libvpx_vp8_encoder;
4555     }
4556     enabled libvpx_vp9_decoder && {
4557         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4558             disable libvpx_vp9_decoder;
4559     }
4560     enabled libvpx_vp9_encoder && {
4561         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4562             disable libvpx_vp9_encoder;
4563     }
4564     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4565         die "libvpx enabled but no supported decoders found"
4566     fi
4567 }
4568 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4569 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4570 enabled libx264           && require_pkg_config x264 "stdint.h x264.h" x264_encoder_encode &&
4571                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4572                                die "ERROR: libx264 version must be >= 0.118."; } &&
4573                              { check_cpp_condition x264.h "X264_MPEG2" &&
4574                                enable libx262; }
4575 enabled libx265           && require_pkg_config x265 x265.h x265_api_get &&
4576                              { check_cpp_condition x265.h "X265_BUILD >= 57" ||
4577                                die "ERROR: libx265 version must be >= 57."; }
4578 enabled libxavs           && require libxavs xavs.h xavs_encoder_encode -lxavs
4579 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4580 enabled mmal              && { check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4581                                 { ! enabled cross_compile && {
4582                                     add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline ;
4583                                     add_extralibs -L/opt/vc/lib/ -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ;
4584                                     check_lib interface/mmal/mmal.h mmal_port_connect ; }
4585                                 check_lib interface/mmal/mmal.h mmal_port_connect ; } ||
4586                                die "ERROR: mmal not found"; }
4587 enabled openssl           && { check_pkg_config openssl openssl/ssl.h SSL_library_init && {
4588                                add_cflags $openssl_cflags && add_extralibs $openssl_libs; }||
4589                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4590                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4591                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4592                                die "ERROR: openssl not found"; }
4593
4594 if enabled gnutls; then
4595     { check_lib2 gmp.h mpz_export -lgmp && enable gmp; } ||
4596     { check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }
4597 fi
4598
4599 # libdc1394 check
4600 if enabled libdc1394; then
4601     { require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new &&
4602         enable libdc1394_2; } ||
4603     { check_lib libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394 &&
4604         enable libdc1394_1; } ||
4605     die "ERROR: No version of libdc1394 found "
4606 fi
4607
4608 if enabled nvenc; then
4609     check_header cuda.h || die "ERROR: cuda.h not found.";
4610     check_header nvEncodeAPI.h || die "ERROR: nvEncodeAPI.h not found.";
4611     check_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 5" ||
4612         die "ERROR: NVENC API version 4 or older is not supported";
4613 fi
4614
4615 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4616     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4617     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4618     enable sdl
4619 fi
4620
4621 pod2man --help     > /dev/null 2>&1 && enable pod2man   || disable pod2man
4622 texi2html -version > /dev/null 2>&1 && enable texi2html || disable texi2html
4623
4624 check_header linux/fb.h
4625 check_header linux/videodev2.h
4626 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4627
4628 check_header AVFoundation/AVFoundation.h &&
4629     check_objcflags -fobjc-arc &&
4630     add_extralibs -framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia ||
4631     disable AVFoundation_AVFoundation_h
4632
4633 check_header sys/videoio.h
4634
4635 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
4636 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4637 # w32api 3.12 had it defined wrong
4638 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4639
4640 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4641 { check_header dev/bktr/ioctl_meteor.h &&
4642   check_header dev/bktr/ioctl_bt848.h; } ||
4643 { check_header machine/ioctl_meteor.h &&
4644   check_header machine/ioctl_bt848.h; } ||
4645 { check_header dev/video/meteor/ioctl_meteor.h &&
4646   check_header dev/video/bktr/ioctl_bt848.h; } ||
4647 check_header dev/ic/bt8xx.h
4648
4649 check_header sndio.h
4650 check_header sys/soundcard.h
4651 check_header soundcard.h
4652
4653 enabled_any alsa_indev alsa_outdev &&
4654     check_lib2 alsa/asoundlib.h snd_pcm_htimestamp -lasound
4655
4656 enabled jack_indev && check_lib2 jack/jack.h jack_client_open -ljack &&
4657     check_func jack_port_get_latency_range -ljack
4658
4659 enabled_any sndio_indev sndio_outdev && check_lib2 sndio.h sio_open -lsndio
4660
4661 if enabled libcdio; then
4662     check_lib2 "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4663     check_lib2 "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4664     die "ERROR: No usable libcdio/cdparanoia found"
4665 fi
4666
4667 check_lib X11/Xlib.h XOpenDisplay -lX11 && enable xlib
4668
4669 if enabled libxcb || enabled x11grab && ! disabled libxcb; then
4670     check_pkg_config xcb-shape xcb/shape.h xcb_shape_rectangles || {
4671         enabled libxcb && die "ERROR: libxcb not found";
4672     } && disable x11grab && enable libxcb
4673
4674     disabled libxcb_shm ||
4675         check_pkg_config xcb-shm xcb/shm.h xcb_shm_attach || {
4676             enabled libxcb_shm && die "ERROR: libxcb_shm not found";
4677         } && check_header sys/shm.h && enable libxcb_shm
4678
4679     disabled libxcb_xfixes ||
4680         check_pkg_config xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image || {
4681             enabled libxcb_xfixes && die "ERROR: libxcb_xfixes not found";
4682         } && enable libxcb_xfixes
4683
4684     add_cflags "$xcb_event_cflags $xcb_shm_cflags $xcb_xfixes_cflags"
4685     add_extralibs "$xcb_event_libs $xcb_shm_libs $xcb_xfixes_libs"
4686 fi
4687
4688 if enabled x11grab; then
4689     enabled xlib || die "ERROR: Xlib not found"
4690     require Xext X11/extensions/XShm.h XShmCreateImage -lXext
4691     require Xfixes X11/extensions/Xfixes.h XFixesGetCursorImage -lXfixes
4692 fi
4693
4694 enabled vaapi && enabled xlib &&
4695     check_lib2 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 &&
4696     enable vaapi_x11
4697
4698 enabled vdpau &&
4699     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4700     disable vdpau
4701
4702 enabled vdpau && enabled xlib &&
4703     check_func_headers "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau &&
4704     prepend avconv_libs $($ldflags_filter "-lvdpau") &&
4705     enable vdpau_x11
4706
4707 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4708
4709 # add some useful compiler flags if supported
4710 check_cflags -Wdeclaration-after-statement
4711 check_cflags -Wall
4712 check_cflags -Wdisabled-optimization
4713 check_cflags -Wpointer-arith
4714 check_cflags -Wredundant-decls
4715 check_cflags -Wwrite-strings
4716 check_cflags -Wtype-limits
4717 check_cflags -Wundef
4718 check_cflags -Wmissing-prototypes
4719 check_cflags -Wstrict-prototypes
4720 enabled extra_warnings && check_cflags -Winline
4721 enabled extra_warnings && check_cflags -Wcast-qual
4722
4723 check_disable_warning(){
4724     warning_flag=-W${1#-Wno-}
4725     test_cflags $warning_flag && add_cflags $1
4726 }
4727
4728 check_disable_warning -Wno-parentheses
4729 check_disable_warning -Wno-switch
4730 check_disable_warning -Wno-format-zero-length
4731 check_disable_warning -Wno-pointer-sign
4732
4733 # add some linker flags
4734 check_ldflags -Wl,--warn-common
4735 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4736 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir
4737 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
4738
4739 # add some strip flags
4740 # -wN '..@*' is more selective than -x, but not available everywhere.
4741 check_stripflags -wN \'..@*\' || check_stripflags -x || strip='true'
4742
4743 enabled neon_clobber_test &&
4744     check_ldflags -Wl,--wrap,avcodec_open2              \
4745                   -Wl,--wrap,avcodec_decode_audio4      \
4746                   -Wl,--wrap,avcodec_decode_video2      \
4747                   -Wl,--wrap,avcodec_decode_subtitle2   \
4748                   -Wl,--wrap,avcodec_encode_audio2      \
4749                   -Wl,--wrap,avcodec_encode_video2      \
4750                   -Wl,--wrap,avcodec_encode_subtitle    \
4751                   -Wl,--wrap,avresample_convert ||
4752     disable neon_clobber_test
4753
4754 enabled xmm_clobber_test &&
4755     check_ldflags -Wl,--wrap,avcodec_open2              \
4756                   -Wl,--wrap,avcodec_decode_audio4      \
4757                   -Wl,--wrap,avcodec_decode_video2      \
4758                   -Wl,--wrap,avcodec_decode_subtitle2   \
4759                   -Wl,--wrap,avcodec_encode_audio2      \
4760                   -Wl,--wrap,avcodec_encode_video2      \
4761                   -Wl,--wrap,avcodec_encode_subtitle    \
4762                   -Wl,--wrap,avresample_convert         \
4763                   -Wl,--wrap,sws_scale ||
4764     disable xmm_clobber_test
4765
4766 echo "X { local: *; };" > $TMPV
4767 if test_ldflags -Wl,--version-script,$TMPV; then
4768     append SHFLAGS '-Wl,--version-script,\$(SUBDIR)lib\$(NAME).ver'
4769 elif test_ldflags -Wl,-M,$TMPV; then
4770     append SHFLAGS '-Wl,-M,\$(SUBDIR)lib\$(NAME).ver-sol2'
4771 fi
4772
4773 check_cc <<EOF && enable symver_asm_label
4774 void ff_foo(void) __asm__ ("av_foo@VERSION");
4775 void ff_foo(void) { ${inline_asm+__asm__($quotes);} }
4776 EOF
4777     check_cc <<EOF && enable symver_gnu_asm
4778 __asm__(".symver ff_foo,av_foo@VERSION");
4779 void ff_foo(void) {}
4780 EOF
4781
4782 if [ -z "$optflags" ]; then
4783     if enabled small; then
4784         optflags=$cflags_size
4785     elif enabled optimizations; then
4786         optflags=$cflags_speed
4787     else
4788         optflags=$cflags_noopt
4789     fi
4790 fi
4791
4792 check_optflags(){
4793     check_cflags "$@"
4794     enabled lto && check_ldflags "$@"
4795 }
4796
4797
4798 if enabled lto; then
4799     test "$cc_type" != "$ld_type" && die "LTO requires same compiler and linker"
4800     check_cflags  -flto
4801     check_ldflags -flto $cpuflags
4802 fi
4803
4804 check_optflags $optflags
4805 check_optflags -fno-math-errno
4806 check_optflags -fno-signed-zeros
4807
4808 if enabled icc; then
4809     # Just warnings, no remarks
4810     check_cflags -w1
4811     # -wd: Disable following warnings
4812     # 144, 167, 556: -Wno-pointer-sign
4813     # 1292: attribute "foo" ignored
4814     # 1419: external declaration in primary source file
4815     # 10006: ignoring unknown option -fno-signed-zeros