23e4037bff1207ab291add5313f3cc4e21caf995
[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 disable(){
491     set_all no $*
492 }
493
494 enable_weak(){
495     set_weak yes $*
496 }
497
498 disable_weak(){
499     set_weak no $*
500 }
501
502 enable_safe(){
503     for var; do
504         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
505     done
506 }
507
508 disable_safe(){
509     for var; do
510         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
511     done
512 }
513
514 do_enable_deep(){
515     for var; do
516         enabled $var && continue
517         eval sel="\$${var}_select"
518         eval sgs="\$${var}_suggest"
519         pushvar var sgs
520         enable_deep $sel
521         popvar sgs
522         enable_deep_weak $sgs
523         popvar var
524     done
525 }
526
527 enable_deep(){
528     do_enable_deep $*
529     enable $*
530 }
531
532 enable_deep_weak(){
533     for var; do
534         disabled $var && continue
535         pushvar var
536         do_enable_deep $var
537         popvar var
538         enable_weak $var
539     done
540 }
541
542 enabled(){
543     test "${1#!}" = "$1" && op== || op=!=
544     eval test "x\$${1#!}" $op "xyes"
545 }
546
547 disabled(){
548     test "${1#!}" = "$1" && op== || op=!=
549     eval test "x\$${1#!}" $op "xno"
550 }
551
552 enabled_all(){
553     for opt; do
554         enabled $opt || return 1
555     done
556 }
557
558 disabled_all(){
559     for opt; do
560         disabled $opt || return 1
561     done
562 }
563
564 enabled_any(){
565     for opt; do
566         enabled $opt && return 0
567     done
568 }
569
570 disabled_any(){
571     for opt; do
572         disabled $opt && return 0
573     done
574     return 1
575 }
576
577 set_default(){
578     for opt; do
579         eval : \${$opt:=\$${opt}_default}
580     done
581 }
582
583 is_in(){
584     value=$1
585     shift
586     for var in $*; do
587         [ $var = $value ] && return 0
588     done
589     return 1
590 }
591
592 do_check_deps(){
593     for cfg; do
594         cfg="${cfg#!}"
595         enabled ${cfg}_checking && die "Circular dependency for $cfg."
596         disabled ${cfg}_checking && continue
597         enable ${cfg}_checking
598         append allopts $cfg
599
600         eval dep_all="\$${cfg}_deps"
601         eval dep_any="\$${cfg}_deps_any"
602         eval dep_sel="\$${cfg}_select"
603         eval dep_sgs="\$${cfg}_suggest"
604         eval dep_ifa="\$${cfg}_if"
605         eval dep_ifn="\$${cfg}_if_any"
606
607         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
608         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
609         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
610
611         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
612         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
613         enabled_all  $dep_all || disable $cfg
614         enabled_any  $dep_any || disable $cfg
615         disabled_any $dep_sel && disable $cfg
616
617         if enabled $cfg; then
618             enable_deep $dep_sel
619             enable_deep_weak $dep_sgs
620         fi
621
622         disable ${cfg}_checking
623     done
624 }
625
626 check_deps(){
627     unset allopts
628
629     do_check_deps "$@"
630
631     for cfg in $allopts; do
632         enabled $cfg || continue
633         eval dep_extralibs="\$${cfg}_extralibs"
634         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
635     done
636 }
637
638 print_config(){
639     pfx=$1
640     files=$2
641     shift 2
642     map 'eval echo "$v \${$v:-no}"' "$@" |
643     awk "BEGIN { split(\"$files\", files) }
644         {
645             c = \"$pfx\" toupper(\$1);
646             v = \$2;
647             sub(/yes/, 1, v);
648             sub(/no/,  0, v);
649             for (f in files) {
650                 file = files[f];
651                 if (file ~ /\\.h\$/) {
652                     printf(\"#define %s %d\\n\", c, v) >>file;
653                 } else if (file ~ /\\.asm\$/) {
654                     printf(\"%%define %s %d\\n\", c, v) >>file;
655                 } else if (file ~ /\\.mak\$/) {
656                     n = -v ? \"\" : \"!\";
657                     printf(\"%s%s=yes\\n\", n, c) >>file;
658                 }
659             }
660         }"
661 }
662
663 print_enabled(){
664     suf=$1
665     shift
666     for v; do
667         enabled $v && printf "%s\n" ${v%$suf};
668     done
669 }
670
671 append(){
672     var=$1
673     shift
674     eval "$var=\"\$$var $*\""
675 }
676
677 prepend(){
678     var=$1
679     shift
680     eval "$var=\"$* \$$var\""
681 }
682
683 unique(){
684     var=$1
685     uniq_list=""
686     for tok in $(eval echo \$$var); do
687         uniq_list="$(filter_out $tok $uniq_list) $tok"
688     done
689     eval "$var=\"${uniq_list}\""
690 }
691
692 add_cppflags(){
693     append CPPFLAGS "$@"
694 }
695
696 add_cflags(){
697     append CFLAGS $($cflags_filter "$@")
698 }
699
700 add_asflags(){
701     append ASFLAGS $($asflags_filter "$@")
702 }
703
704 add_objcflags(){
705     append OBJCFLAGS $($objcflags_filter "$@")
706 }
707
708 add_ldflags(){
709     append LDFLAGS $($ldflags_filter "$@")
710 }
711
712 add_ldexeflags(){
713     append LDEXEFLAGS $($ldflags_filter "$@")
714 }
715
716 add_stripflags(){
717     append STRIPFLAGS "$@"
718 }
719
720 add_extralibs(){
721     prepend extralibs $($ldflags_filter "$@")
722 }
723
724 add_host_cppflags(){
725     append host_cppflags "$@"
726 }
727
728 add_host_cflags(){
729     append host_cflags $($host_cflags_filter "$@")
730 }
731
732 add_host_ldflags(){
733     append host_ldflags $($host_ldflags_filter "$@")
734 }
735
736 add_compat(){
737     append compat_objs $1
738     shift
739     map 'add_cppflags -D$v' "$@"
740 }
741
742 check_cmd(){
743     log "$@"
744     "$@" >> $logfile 2>&1
745 }
746
747 cc_o(){
748     eval printf '%s\\n' $CC_O
749 }
750
751 cc_e(){
752     eval printf '%s\\n' $CC_E
753 }
754
755 check_cc(){
756     log check_cc "$@"
757     cat > $TMPC
758     log_file $TMPC
759     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
760 }
761
762 check_objcc(){
763     log check_objcc "$@"
764     cat > $TMPC
765     log_file $TMPC
766     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
767 }
768
769 check_cpp(){
770     log check_cpp "$@"
771     cat > $TMPC
772     log_file $TMPC
773     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
774 }
775
776 as_o(){
777     eval printf '%s\\n' $AS_O
778 }
779
780 check_as(){
781     log check_as "$@"
782     cat > $TMPS
783     log_file $TMPS
784     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
785 }
786
787 check_inline_asm(){
788     log check_inline_asm "$@"
789     name="$1"
790     code="$2"
791     shift 2
792     disable $name
793     check_cc "$@" <<EOF && enable $name
794 void foo(void){ __asm__ volatile($code); }
795 EOF
796 }
797
798 check_insn(){
799     log check_insn "$@"
800     check_inline_asm ${1}_inline "\"$2\""
801     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
802 }
803
804 check_yasm(){
805     log check_yasm "$@"
806     echo "$1" > $TMPS
807     log_file $TMPS
808     shift 1
809     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
810 }
811
812 ld_o(){
813     eval printf '%s\\n' $LD_O
814 }
815
816 check_ld(){
817     log check_ld "$@"
818     flags=$(filter_out '-l*' "$@")
819     libs=$(filter '-l*' "$@")
820     check_cc $($cflags_filter $flags) || return
821     flags=$($ldflags_filter $flags)
822     libs=$($ldflags_filter $libs)
823     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
824 }
825
826 print_include(){
827     hdr=$1
828     test "${hdr%.h}" = "${hdr}" &&
829         echo "#include $hdr"    ||
830         echo "#include <$hdr>"
831 }
832
833 check_code(){
834     log check_code "$@"
835     check=$1
836     headers=$2
837     code=$3
838     shift 3
839     {
840         for hdr in $headers; do
841             print_include $hdr
842         done
843         echo "int main(void) { $code; return 0; }"
844     } | check_$check "$@"
845 }
846
847 check_cppflags(){
848     log check_cppflags "$@"
849     check_cc "$@" <<EOF && append CPPFLAGS "$@"
850 int x;
851 EOF
852 }
853
854 test_cflags(){
855     log test_cflags "$@"
856     set -- $($cflags_filter "$@")
857     check_cc "$@" <<EOF
858 int x;
859 EOF
860 }
861
862 check_cflags(){
863     log check_cflags "$@"
864     test_cflags "$@" && add_cflags "$@"
865 }
866
867 test_objcflags(){
868     log test_cflags "$@"
869     set -- $($cflags_filter "$@")
870     check_objcc "$@" <<EOF
871 int x;
872 EOF
873 }
874
875 check_objcflags(){
876     log check_cflags "$@"
877     test_objcflags "$@" && add_objcflags "$@"
878 }
879
880 test_ldflags(){
881     log test_ldflags "$@"
882     check_ld "$@" <<EOF
883 int main(void){ return 0; }
884 EOF
885 }
886
887 check_ldflags(){
888     log check_ldflags "$@"
889     test_ldflags "$@" && add_ldflags "$@"
890 }
891
892 test_stripflags(){
893     log test_stripflags "$@"
894     # call check_cc to get a fresh TMPO
895     check_cc <<EOF
896 int main(void) { return 0; }
897 EOF
898     check_cmd $strip $STRIPFLAGS "$@" $TMPO
899 }
900
901 check_stripflags(){
902     log check_stripflags "$@"
903     test_stripflags "$@" && add_stripflags "$@"
904 }
905
906 check_header(){
907     log check_header "$@"
908     header=$1
909     shift
910     disable_safe $header
911     check_cpp "$@" <<EOF && enable_safe $header
912 #include <$header>
913 int x;
914 EOF
915 }
916
917 check_func(){
918     log check_func "$@"
919     func=$1
920     shift
921     disable $func
922     check_ld "$@" <<EOF && enable $func
923 extern int $func();
924 int main(void){ $func(); }
925 EOF
926 }
927
928 check_mathfunc(){
929     log check_mathfunc "$@"
930     func=$1
931     narg=$2
932     shift 2
933     test $narg = 2 && args="f, g" || args="f"
934     disable $func
935     check_ld "$@" <<EOF && enable $func
936 #include <math.h>
937 float foo(float f, float g) { return $func($args); }
938 int main(void){ return 0; }
939 EOF
940 }
941
942 check_func_headers(){
943     log check_func_headers "$@"
944     headers=$1
945     funcs=$2
946     shift 2
947     {
948         for hdr in $headers; do
949             print_include $hdr
950         done
951         for func in $funcs; do
952             echo "long check_$func(void) { return (long) $func; }"
953         done
954         echo "int main(void) { return 0; }"
955     } | check_ld "$@" && enable $funcs && enable_safe $headers
956 }
957
958 check_cpp_condition(){
959     log check_cpp_condition "$@"
960     header=$1
961     condition=$2
962     shift 2
963     check_cpp "$@" <<EOF
964 #include <$header>
965 #if !($condition)
966 #error "unsatisfied condition: $condition"
967 #endif
968 EOF
969 }
970
971 check_lib(){
972     log check_lib "$@"
973     header="$1"
974     func="$2"
975     shift 2
976     check_header $header && check_func $func "$@" && add_extralibs "$@"
977 }
978
979 check_lib2(){
980     log check_lib2 "$@"
981     headers="$1"
982     funcs="$2"
983     shift 2
984     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
985 }
986
987 check_pkg_config(){
988     log check_pkg_config "$@"
989     pkg="$1"
990     headers="$2"
991     funcs="$3"
992     shift 3
993     check_cmd $pkg_config --exists --print-errors $pkg || return
994     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
995     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
996     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
997         set_safe "${pkg}_cflags" $pkg_cflags   &&
998         set_safe "${pkg}_libs"   $pkg_libs
999 }
1000
1001 check_exec(){
1002     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1003 }
1004
1005 check_exec_crash(){
1006     code=$(cat)
1007
1008     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1009     # are safe but may not be available everywhere.  Thus we use
1010     # raise(SIGTERM) instead.  The check is run in a subshell so we
1011     # can redirect the "Terminated" message from the shell.  SIGBUS
1012     # is not defined by standard C so it is used conditionally.
1013
1014     (check_exec "$@") >> $logfile 2>&1 <<EOF
1015 #include <signal.h>
1016 static void sighandler(int sig){
1017     raise(SIGTERM);
1018 }
1019 int foo(void){
1020     $code
1021 }
1022 int (*func_ptr)(void) = foo;
1023 int main(void){
1024     signal(SIGILL, sighandler);
1025     signal(SIGFPE, sighandler);
1026     signal(SIGSEGV, sighandler);
1027 #ifdef SIGBUS
1028     signal(SIGBUS, sighandler);
1029 #endif
1030     return func_ptr();
1031 }
1032 EOF
1033 }
1034
1035 check_type(){
1036     log check_type "$@"
1037     headers=$1
1038     type=$2
1039     shift 2
1040     disable_safe "$type"
1041     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1042 }
1043
1044 check_struct(){
1045     log check_struct "$@"
1046     headers=$1
1047     struct=$2
1048     member=$3
1049     shift 3
1050     disable_safe "${struct}_${member}"
1051     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1052         enable_safe "${struct}_${member}"
1053 }
1054
1055 check_builtin(){
1056     log check_builtin "$@"
1057     name=$1
1058     headers=$2
1059     builtin=$3
1060     shift 3
1061     disable "$name"
1062     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1063 }
1064
1065 check_compile_assert(){
1066     log check_compile_assert "$@"
1067     name=$1
1068     headers=$2
1069     condition=$3
1070     shift 3
1071     disable "$name"
1072     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1073 }
1074
1075 require(){
1076     name="$1"
1077     header="$2"
1078     func="$3"
1079     shift 3
1080     check_lib $header $func "$@" || die "ERROR: $name not found"
1081 }
1082
1083 require2(){
1084     name="$1"
1085     headers="$2"
1086     func="$3"
1087     shift 3
1088     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1089 }
1090
1091 require_pkg_config(){
1092     pkg="$1"
1093     check_pkg_config "$@" || die "ERROR: $pkg not found"
1094     add_cflags    $(get_safe "${pkg}_cflags")
1095     add_extralibs $(get_safe "${pkg}_libs")
1096 }
1097
1098 hostcc_e(){
1099     eval printf '%s\\n' $HOSTCC_E
1100 }
1101
1102 hostcc_o(){
1103     eval printf '%s\\n' $HOSTCC_O
1104 }
1105
1106 check_host_cc(){
1107     log check_host_cc "$@"
1108     cat > $TMPC
1109     log_file $TMPC
1110     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1111 }
1112
1113 check_host_cpp(){
1114     log check_host_cpp "$@"
1115     cat > $TMPC
1116     log_file $TMPC
1117     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1118 }
1119
1120 check_host_cppflags(){
1121     log check_host_cppflags "$@"
1122     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1123 int x;
1124 EOF
1125 }
1126
1127 check_host_cflags(){
1128     log check_host_cflags "$@"
1129     set -- $($host_cflags_filter "$@")
1130     check_host_cc "$@" <<EOF && append host_cflags "$@"
1131 int x;
1132 EOF
1133 }
1134
1135 check_host_cpp_condition(){
1136     log check_host_cpp_condition "$@"
1137     header=$1
1138     condition=$2
1139     shift 2
1140     check_host_cpp "$@" <<EOF
1141 #include <$header>
1142 #if !($condition)
1143 #error "unsatisfied condition: $condition"
1144 #endif
1145 EOF
1146 }
1147
1148 apply(){
1149     file=$1
1150     shift
1151     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1152 }
1153
1154 cp_if_changed(){
1155     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1156     mkdir -p "$(dirname $2)"
1157     $cp_f "$1" "$2"
1158 }
1159
1160 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1161 # system-dependent things.
1162
1163 AVCODEC_COMPONENTS="
1164     bsfs
1165     decoders
1166     encoders
1167     hwaccels
1168     parsers
1169 "
1170
1171 AVDEVICE_COMPONENTS="
1172     indevs
1173     outdevs
1174 "
1175 AVFILTER_COMPONENTS="
1176     filters
1177 "
1178 AVFORMAT_COMPONENTS="
1179     demuxers
1180     muxers
1181     protocols
1182 "
1183
1184 AVRESAMPLE_COMPONENTS=""
1185 AVUTIL_COMPONENTS=""
1186
1187 COMPONENT_LIST="
1188     $AVCODEC_COMPONENTS
1189     $AVDEVICE_COMPONENTS
1190     $AVFILTER_COMPONENTS
1191     $AVFORMAT_COMPONENTS
1192     $AVRESAMPLE_COMPONENTS
1193     $AVUTIL_COMPONENTS
1194 "
1195
1196 EXAMPLE_LIST="
1197     avcodec_example
1198     filter_audio_example
1199     metadata_example
1200     output_example
1201     qsvdec_example
1202     transcode_aac_example
1203 "
1204
1205 EXTERNAL_LIBRARY_LIST="
1206     avisynth
1207     bzlib
1208     frei0r
1209     gnutls
1210     libbs2b
1211     libcdio
1212     libdc1394
1213     libdcadec
1214     libfaac
1215     libfdk_aac
1216     libfontconfig
1217     libfreetype
1218     libgsm
1219     libilbc
1220     libkvazaar
1221     libmfx
1222     libmp3lame
1223     libopencore_amrnb
1224     libopencore_amrwb
1225     libopencv
1226     libopenh264
1227     libopenjpeg
1228     libopus
1229     libpulse
1230     librtmp
1231     libschroedinger
1232     libsnappy
1233     libspeex
1234     libtheora
1235     libtwolame
1236     libvo_aacenc
1237     libvo_amrwbenc
1238     libvorbis
1239     libvpx
1240     libwavpack
1241     libwebp
1242     libx264
1243     libx265
1244     libxavs
1245     libxcb
1246     libxcb_shm
1247     libxcb_xfixes
1248     libxvid
1249     mmal
1250     nvenc
1251     openssl
1252     x11grab
1253     zlib
1254 "
1255
1256 FEATURE_LIST="
1257     gray
1258     hardcoded_tables
1259     runtime_cpudetect
1260     safe_bitstream_reader
1261     shared
1262     small
1263     sram
1264     static
1265     swscale_alpha
1266 "
1267
1268 HWACCEL_LIST="
1269     d3d11va
1270     dxva2
1271     vaapi
1272     vda
1273     vdpau
1274 "
1275
1276 LIBRARY_LIST="
1277     avcodec
1278     avdevice
1279     avfilter
1280     avformat
1281     avresample
1282     avutil
1283     swscale
1284 "
1285
1286 LICENSE_LIST="
1287     gpl
1288     nonfree
1289     version3
1290 "
1291
1292 PROGRAM_LIST="
1293     avconv
1294     avplay
1295     avprobe
1296 "
1297
1298 SUBSYSTEM_LIST="
1299     dct
1300     doc
1301     error_resilience
1302     faan
1303     fft
1304     lsp
1305     lzo
1306     mdct
1307     network
1308     rdft
1309 "
1310
1311 CONFIG_LIST="
1312     $COMPONENT_LIST
1313     $EXAMPLE_LIST
1314     $EXTERNAL_LIBRARY_LIST
1315     $FEATURE_LIST
1316     $HWACCEL_LIST
1317     $LICENSE_LIST
1318     $LIBRARY_LIST
1319     $PROGRAM_LIST
1320     $SUBSYSTEM_LIST
1321     memalign_hack
1322     neon_clobber_test
1323     pic
1324     pod2man
1325     texi2html
1326     thumb
1327     valgrind_backtrace
1328     xmm_clobber_test
1329 "
1330
1331 THREADS_LIST="
1332     pthreads
1333     w32threads
1334 "
1335
1336 ATOMICS_LIST="
1337     atomics_gcc
1338     atomics_suncc
1339     atomics_win32
1340 "
1341
1342 ARCH_LIST="
1343     aarch64
1344     alpha
1345     arm
1346     avr32
1347     avr32_ap
1348     avr32_uc
1349     bfin
1350     ia64
1351     m68k
1352     mips
1353     mips64
1354     parisc
1355     ppc
1356     ppc64
1357     s390
1358     sh4
1359     sparc
1360     sparc64
1361     tilegx
1362     tilepro
1363     tomi
1364     x86
1365     x86_32
1366     x86_64
1367 "
1368
1369 ARCH_EXT_LIST_ARM="
1370     armv5te
1371     armv6
1372     armv6t2
1373     armv8
1374     neon
1375     vfp
1376     vfpv3
1377 "
1378
1379 ARCH_EXT_LIST_X86_SIMD="
1380     amd3dnow
1381     amd3dnowext
1382     avx
1383     avx2
1384     fma3
1385     fma4
1386     mmx
1387     mmxext
1388     sse
1389     sse2
1390     sse3
1391     sse4
1392     sse42
1393     ssse3
1394     xop
1395 "
1396
1397 ARCH_EXT_LIST_PPC="
1398     altivec
1399     dcbzl
1400     ldbrx
1401     power8
1402     ppc4xx
1403     vsx
1404 "
1405
1406 ARCH_EXT_LIST_X86="
1407     $ARCH_EXT_LIST_X86_SIMD
1408     cpunop
1409     i686
1410 "
1411
1412 ARCH_EXT_LIST_MIPS="
1413     loongson
1414     mips32r1
1415     mips64r1
1416     mips32r2
1417     mips64r2
1418     mips32r6
1419     mips64r6
1420 "
1421
1422 ARCH_EXT_LIST="
1423     $ARCH_EXT_LIST_ARM
1424     $ARCH_EXT_LIST_MIPS
1425     $ARCH_EXT_LIST_PPC
1426     $ARCH_EXT_LIST_X86
1427     vis
1428 "
1429
1430 ARCH_FEATURES="
1431     aligned_stack
1432     fast_64bit
1433     fast_clz
1434     fast_cmov
1435     local_aligned_8
1436     local_aligned_16
1437     simd_align_16
1438 "
1439
1440 BUILTIN_LIST="
1441     atomic_cas_ptr
1442     machine_rw_barrier
1443     MemoryBarrier
1444     mm_empty
1445     rdtsc
1446     sync_val_compare_and_swap
1447 "
1448 HAVE_LIST_CMDLINE="
1449     inline_asm
1450     symver
1451     yasm
1452 "
1453
1454 HAVE_LIST_PUB="
1455     bigendian
1456     fast_unaligned
1457 "
1458
1459 HEADERS_LIST="
1460     AVFoundation_AVFoundation_h
1461     alsa_asoundlib_h
1462     altivec_h
1463     arpa_inet_h
1464     cdio_paranoia_h
1465     cdio_paranoia_paranoia_h
1466     dev_bktr_ioctl_bt848_h
1467     dev_bktr_ioctl_meteor_h
1468     dev_ic_bt8xx_h
1469     dev_video_bktr_ioctl_bt848_h
1470     dev_video_meteor_ioctl_meteor_h
1471     direct_h
1472     dlfcn_h
1473     d3d11_h
1474     dxva_h
1475     gsm_h
1476     io_h
1477     mach_mach_time_h
1478     machine_ioctl_bt848_h
1479     machine_ioctl_meteor_h
1480     malloc_h
1481     poll_h
1482     sndio_h
1483     soundcard_h
1484     sys_mman_h
1485     sys_param_h
1486     sys_resource_h
1487     sys_select_h
1488     sys_soundcard_h
1489     sys_time_h
1490     sys_un_h
1491     sys_videoio_h
1492     unistd_h
1493     valgrind_valgrind_h
1494     windows_h
1495     winsock2_h
1496 "
1497
1498 INTRINSICS_LIST="
1499     intrinsics_neon
1500 "
1501
1502 MATH_FUNCS="
1503     atanf
1504     atan2f
1505     cbrtf
1506     cosf
1507     exp2
1508     exp2f
1509     expf
1510     isinf
1511     isnan
1512     ldexpf
1513     llrint
1514     llrintf
1515     log2
1516     log2f
1517     log10f
1518     lrint
1519     lrintf
1520     powf
1521     rint
1522     round
1523     roundf
1524     sinf
1525     trunc
1526     truncf
1527 "
1528
1529 SYSTEM_FUNCS="
1530     aligned_malloc
1531     clock_gettime
1532     closesocket
1533     CommandLineToArgvW
1534     CoTaskMemFree
1535     CryptGenRandom
1536     dlopen
1537     fcntl
1538     flt_lim
1539     fork
1540     getaddrinfo
1541     gethrtime
1542     getopt
1543     GetProcessAffinityMask
1544     GetProcessMemoryInfo
1545     GetProcessTimes
1546     getrusage
1547     GetSystemTimeAsFileTime
1548     gettimeofday
1549     gmtime_r
1550     inet_aton
1551     isatty
1552     jack_port_get_latency_range
1553     LoadLibrary
1554     localtime_r
1555     mach_absolute_time
1556     MapViewOfFile
1557     memalign
1558     mkstemp
1559     mmap
1560     mprotect
1561     nanosleep
1562     posix_memalign
1563     sched_getaffinity
1564     SetConsoleTextAttribute
1565     setmode
1566     setrlimit
1567     Sleep
1568     strerror_r
1569     sysconf
1570     sysctl
1571     usleep
1572     VirtualAlloc
1573 "
1574
1575 TOOLCHAIN_FEATURES="
1576     as_dn_directive
1577     as_func
1578     as_object_arch
1579     asm_mod_q
1580     attribute_may_alias
1581     attribute_packed
1582     ebp_available
1583     ebx_available
1584     gnu_as
1585     ibm_asm
1586     inline_asm_labels
1587     pragma_deprecated
1588     symver_asm_label
1589     symver_gnu_asm
1590     vfp_args
1591     xform_asm
1592     xmm_clobbers
1593 "
1594
1595 TYPES_LIST="
1596     CONDITION_VARIABLE_Ptr
1597     socklen_t
1598     struct_addrinfo
1599     struct_group_source_req
1600     struct_ip_mreq_source
1601     struct_ipv6_mreq
1602     struct_pollfd
1603     struct_rusage_ru_maxrss
1604     struct_sockaddr_in6
1605     struct_sockaddr_sa_len
1606     struct_sockaddr_storage
1607     struct_v4l2_frmivalenum_discrete
1608 "
1609
1610 HAVE_LIST="
1611     $ARCH_EXT_LIST
1612     $(add_suffix _external $ARCH_EXT_LIST)
1613     $(add_suffix _inline   $ARCH_EXT_LIST)
1614     $ARCH_FEATURES
1615     $ATOMICS_LIST
1616     $BUILTIN_LIST
1617     $HAVE_LIST_CMDLINE
1618     $HAVE_LIST_PUB
1619     $HEADERS_LIST
1620     $INTRINSICS_LIST
1621     $MATH_FUNCS
1622     $SYSTEM_FUNCS
1623     $THREADS_LIST
1624     $TOOLCHAIN_FEATURES
1625     $TYPES_LIST
1626     atomics_native
1627     dos_paths
1628     dxva2_lib
1629     libc_msvcrt
1630     libdc1394_1
1631     libdc1394_2
1632     sdl
1633     section_data_rel_ro
1634     threads
1635     vaapi_x11
1636     vdpau_x11
1637     xlib
1638 "
1639
1640 # options emitted with CONFIG_ prefix but not available on the command line
1641 CONFIG_EXTRA="
1642     aandcttables
1643     ac3dsp
1644     audio_frame_queue
1645     audiodsp
1646     blockdsp
1647     bswapdsp
1648     cabac
1649     dirac_parse
1650     dvprofile
1651     faandct
1652     faanidct
1653     fdctdsp
1654     flacdsp
1655     fmtconvert
1656     g722dsp
1657     gcrypt
1658     gmp
1659     golomb
1660     gplv3
1661     h263dsp
1662     h264chroma
1663     h264dsp
1664     h264pred
1665     h264qpel
1666     hpeldsp
1667     huffman
1668     huffyuvdsp
1669     huffyuvencdsp
1670     idctdsp
1671     iirfilter
1672     imdct15
1673     intrax8
1674     ividsp
1675     jpegtables
1676     libx262
1677     lgplv3
1678     lpc
1679     lzf
1680     me_cmp
1681     mpeg_er
1682     mpegaudio
1683     mpegaudiodsp
1684     mpegvideo
1685     mpegvideoenc
1686     mss34dsp
1687     pixblockdsp
1688     qpeldsp
1689     qsv
1690     qsvdec
1691     qsvenc
1692     rangecoder
1693     riffdec
1694     riffenc
1695     rtpdec
1696     rtpenc_chain
1697     rv34dsp
1698     sinewin
1699     snappy
1700     startcode
1701     texturedsp
1702     texturedspenc
1703     tpeldsp
1704     videodsp
1705     vp3dsp
1706     vp56dsp
1707     vp8dsp
1708     wma_freqs
1709     wmv2dsp
1710 "
1711
1712 CMDLINE_SELECT="
1713     $ARCH_EXT_LIST
1714     $CONFIG_LIST
1715     $HAVE_LIST_CMDLINE
1716     $THREADS_LIST
1717     asm
1718     cross_compile
1719     debug
1720     extra_warnings
1721     logging
1722     lto
1723     optimizations
1724     rpath
1725 "
1726
1727 PATHS_LIST="
1728     bindir
1729     datadir
1730     docdir
1731     incdir
1732     libdir
1733     mandir
1734     prefix
1735     shlibdir
1736 "
1737
1738 CMDLINE_SET="
1739     $PATHS_LIST
1740     ar
1741     arch
1742     as
1743     build_suffix
1744     cc
1745     objcc
1746     cpu
1747     cross_prefix
1748     custom_allocator
1749     dep_cc
1750     env
1751     extra_version
1752     host_cc
1753     host_cflags
1754     host_ld
1755     host_ldflags
1756     host_libs
1757     host_os
1758     ld
1759     logfile
1760     malloc_prefix
1761     nm
1762     optflags
1763     pkg_config
1764     pkg_config_flags
1765     random_seed
1766     samples
1767     sysinclude
1768     sysroot
1769     target_exec
1770     target_os
1771     target_path
1772     target_samples
1773     toolchain
1774 "
1775
1776 CMDLINE_APPEND="
1777     extra_cflags
1778     extra_objcflags
1779     host_cppflags
1780 "
1781
1782 # code dependency declarations
1783
1784 # architecture extensions
1785
1786 armv5te_deps="arm"
1787 armv6_deps="arm"
1788 armv6t2_deps="arm"
1789 armv8_deps="aarch64"
1790 neon_deps_any="aarch64 arm"
1791 intrinsics_neon_deps="neon"
1792 vfp_deps_any="aarch64 arm"
1793 vfpv3_deps="vfp"
1794
1795 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1796
1797 altivec_deps="ppc"
1798 ppc4xx_deps="ppc"
1799 vsx_deps="altivec"
1800 power8_deps="vsx"
1801
1802 cpunop_deps="i686"
1803 x86_64_select="i686"
1804 x86_64_suggest="fast_cmov"
1805
1806 amd3dnow_deps="mmx"
1807 amd3dnowext_deps="amd3dnow"
1808 i686_deps="x86"
1809 mmx_deps="x86"
1810 mmxext_deps="mmx"
1811 sse_deps="mmxext"
1812 sse2_deps="sse"
1813 sse3_deps="sse2"
1814 ssse3_deps="sse3"
1815 sse4_deps="ssse3"
1816 sse42_deps="sse4"
1817 avx_deps="sse42"
1818 xop_deps="avx"
1819 fma3_deps="avx"
1820 fma4_deps="avx"
1821 avx2_deps="avx"
1822
1823 mmx_external_deps="yasm"
1824 mmx_inline_deps="inline_asm"
1825 mmx_suggest="mmx_external mmx_inline"
1826
1827 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1828     eval dep=\$${ext}_deps
1829     eval ${ext}_external_deps='"${dep}_external"'
1830     eval ${ext}_inline_deps='"${dep}_inline"'
1831     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1832 done
1833
1834 aligned_stack_if_any="aarch64 ppc x86"
1835 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1836 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1837 fast_unaligned_if_any="aarch64 ppc x86"
1838 simd_align_16_if_any="altivec neon sse"
1839
1840 # system capabilities
1841 symver_if_any="symver_asm_label symver_gnu_asm"
1842 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
1843
1844 # threading support
1845 atomics_gcc_if="sync_val_compare_and_swap"
1846 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1847 atomics_win32_if="MemoryBarrier"
1848 atomics_native_if_any="$ATOMICS_LIST"
1849 w32threads_deps="atomics_native"
1850 threads_if_any="$THREADS_LIST"
1851
1852 # subsystems
1853 dct_select="rdft"
1854 dirac_parse_select="golomb"
1855 error_resilience_select="me_cmp"
1856 faandct_deps="faan fdctdsp"
1857 faanidct_deps="faan idctdsp"
1858 intrax8_select="error_resilience"
1859 mdct_select="fft"
1860 rdft_select="fft"
1861 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1862 mpeg_er_select="error_resilience"
1863 mpegaudio_select="mpegaudiodsp"
1864 mpegaudiodsp_select="dct"
1865 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp videodsp"
1866 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1867 nvenc_deps_any="dlopen LoadLibrary"
1868 nvenc_extralibs='$ldl'
1869 qsvdec_select="qsv"
1870 qsvenc_select="qsv"
1871
1872 # decoders / encoders
1873 aac_decoder_select="imdct15 mdct sinewin"
1874 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1875 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1876 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1877 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1878 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1879 adpcm_g722_decoder_select="g722dsp"
1880 adpcm_g722_encoder_select="g722dsp"
1881 aic_decoder_select="golomb idctdsp"
1882 alac_encoder_select="lpc"
1883 als_decoder_select="bswapdsp"
1884 amrnb_decoder_select="lsp"
1885 amrwb_decoder_select="lsp"
1886 amv_decoder_select="sp5x_decoder"
1887 ape_decoder_select="bswapdsp"
1888 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1889 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1890 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1891 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1892 atrac1_decoder_select="mdct sinewin"
1893 atrac3_decoder_select="mdct"
1894 atrac3p_decoder_select="mdct sinewin"
1895 bink_decoder_select="blockdsp hpeldsp"
1896 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1897 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1898 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1899 cllc_decoder_select="bswapdsp"
1900 comfortnoise_encoder_select="lpc"
1901 cook_decoder_select="audiodsp mdct sinewin"
1902 cscd_decoder_select="lzo"
1903 cscd_decoder_suggest="zlib"
1904 dca_decoder_select="fmtconvert mdct"
1905 dds_decoder_select="texturedsp"
1906 dnxhd_decoder_select="blockdsp idctdsp"
1907 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1908 dvvideo_decoder_select="dvprofile idctdsp"
1909 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1910 dxa_decoder_deps="zlib"
1911 dxv_decoder_select="lzf texturedsp"
1912 eac3_decoder_select="ac3_decoder"
1913 eac3_encoder_select="ac3_encoder"
1914 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1915 eatgq_decoder_select="aandcttables idctdsp"
1916 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpeg1video_decoder"
1917 exr_decoder_deps="zlib"
1918 ffv1_decoder_select="golomb rangecoder"
1919 ffv1_encoder_select="rangecoder"
1920 ffvhuff_decoder_select="huffyuv_decoder"
1921 ffvhuff_encoder_select="huffyuv_encoder"
1922 fic_decoder_select="golomb"
1923 flac_decoder_select="flacdsp golomb"
1924 flac_encoder_select="bswapdsp flacdsp golomb lpc"
1925 flashsv_decoder_deps="zlib"
1926 flashsv_encoder_deps="zlib"
1927 flashsv2_decoder_deps="zlib"
1928 flv_decoder_select="h263_decoder"
1929 flv_encoder_select="h263_encoder"
1930 fourxm_decoder_select="blockdsp bswapdsp"
1931 fraps_decoder_select="bswapdsp huffman"
1932 g2m_decoder_deps="zlib"
1933 g2m_decoder_select="blockdsp idctdsp jpegtables"
1934 h261_decoder_select="mpeg_er mpegvideo"
1935 h261_encoder_select="aandcttables mpegvideoenc"
1936 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
1937 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1938 h263i_decoder_select="h263_decoder"
1939 h263p_encoder_select="h263_encoder"
1940 h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel startcode videodsp"
1941 h264_decoder_suggest="error_resilience"
1942 h264_nvenc_encoder_deps="nvenc"
1943 h264_qsv_decoder_deps="libmfx"
1944 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
1945 h264_qsv_encoder_deps="libmfx"
1946 h264_qsv_encoder_select="qsvenc"
1947 hap_decoder_select="snappy texturedsp"
1948 hap_encoder_deps="libsnappy"
1949 hap_encoder_select="texturedspenc"
1950 hevc_decoder_select="bswapdsp cabac golomb videodsp"
1951 hevc_nvenc_encoder_deps="nvenc"
1952 hevc_qsv_encoder_deps="libmfx"
1953 hevc_qsv_decoder_deps="libmfx"
1954 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser qsvdec hevc_qsv_hwaccel"
1955 hevc_qsv_encoder_select="qsvenc"
1956 huffyuv_decoder_select="bswapdsp huffyuvdsp"
1957 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
1958 iac_decoder_select="imc_decoder"
1959 imc_decoder_select="bswapdsp fft mdct sinewin"
1960 indeo3_decoder_select="hpeldsp"
1961 indeo4_decoder_select="ividsp"
1962 indeo5_decoder_select="ividsp"
1963 interplay_video_decoder_select="hpeldsp"
1964 jpegls_decoder_select="golomb mjpeg_decoder"
1965 jpegls_encoder_select="golomb"
1966 jv_decoder_select="blockdsp"
1967 lagarith_decoder_select="huffyuvdsp"
1968 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
1969 loco_decoder_select="golomb"
1970 mdec_decoder_select="blockdsp idctdsp mpegvideo"
1971 metasound_decoder_select="lsp mdct sinewin"
1972 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
1973 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
1974 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
1975 mjpegb_decoder_select="mjpeg_decoder"
1976 mlp_decoder_select="mlp_parser"
1977 motionpixels_decoder_select="bswapdsp"
1978 mp1_decoder_select="mpegaudio"
1979 mp1float_decoder_select="mpegaudio"
1980 mp2_decoder_select="mpegaudio"
1981 mp2float_decoder_select="mpegaudio"
1982 mp3_decoder_select="mpegaudio"
1983 mp3adu_decoder_select="mpegaudio"
1984 mp3adufloat_decoder_select="mpegaudio"
1985 mp3float_decoder_select="mpegaudio"
1986 mp3on4_decoder_select="mpegaudio"
1987 mp3on4float_decoder_select="mpegaudio"
1988 mpc7_decoder_select="bswapdsp mpegaudiodsp"
1989 mpc8_decoder_select="mpegaudiodsp"
1990 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
1991 mpeg_xvmc_decoder_select="mpeg2video_decoder"
1992 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
1993 mpeg1video_encoder_select="aandcttables mpegvideoenc"
1994 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
1995 mpeg2video_encoder_select="aandcttables mpegvideoenc"
1996 mpeg2_qsv_decoder_deps="libmfx"
1997 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
1998 mpeg2_qsv_encoder_deps="libmfx"
1999 mpeg2_qsv_encoder_select="qsvenc"
2000 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2001 mpeg4_encoder_select="h263_encoder"
2002 msa1_decoder_select="mss34dsp"
2003 msmpeg4v1_decoder_select="h263_decoder"
2004 msmpeg4v2_decoder_select="h263_decoder"
2005 msmpeg4v2_encoder_select="h263_encoder"
2006 msmpeg4v3_decoder_select="h263_decoder"
2007 msmpeg4v3_encoder_select="h263_encoder"
2008 mss2_decoder_select="error_resilience mpeg_er qpeldsp vc1_decoder"
2009 mts2_decoder_select="mss34dsp"
2010 mxpeg_decoder_select="mjpeg_decoder"
2011 nellymoser_decoder_select="mdct sinewin"
2012 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2013 nuv_decoder_select="idctdsp lzo"
2014 on2avc_decoder_select="mdct"
2015 opus_decoder_deps="avresample"
2016 opus_decoder_select="imdct15"
2017 png_decoder_deps="zlib"
2018 png_encoder_deps="zlib"
2019 png_encoder_select="huffyuvencdsp"
2020 prores_decoder_select="idctdsp"
2021 prores_encoder_select="fdctdsp"
2022 qcelp_decoder_select="lsp"
2023 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2024 ra_144_encoder_select="audio_frame_queue lpc"
2025 ralf_decoder_select="golomb"
2026 rscc_decoder_deps="zlib"
2027 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2028 rv10_encoder_select="h263_encoder"
2029 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2030 rv20_encoder_select="h263_encoder"
2031 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2032 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2033 screenpresso_decoder_deps="zlib"
2034 shorten_decoder_select="golomb"
2035 sipr_decoder_select="lsp"
2036 sp5x_decoder_select="mjpeg_decoder"
2037 svq1_decoder_select="hpeldsp"
2038 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2039 svq3_decoder_select="h264_decoder hpeldsp tpeldsp"
2040 svq3_decoder_suggest="zlib"
2041 tak_decoder_select="audiodsp"
2042 tdsc_decoder_deps="zlib"
2043 tdsc_decoder_select="mjpeg_decoder"
2044 theora_decoder_select="vp3_decoder"
2045 thp_decoder_select="mjpeg_decoder"
2046 tiff_decoder_suggest="zlib"
2047 tiff_encoder_suggest="zlib"
2048 truehd_decoder_select="mlp_decoder"
2049 truemotion2_decoder_select="bswapdsp"
2050 truespeech_decoder_select="bswapdsp"
2051 tscc_decoder_deps="zlib"
2052 txd_decoder_select="texturedsp"
2053 twinvq_decoder_select="mdct lsp sinewin"
2054 utvideo_decoder_select="bswapdsp"
2055 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2056 vble_decoder_select="huffyuvdsp"
2057 vc1_decoder_select="blockdsp error_resilience h263_decoder h264chroma h264qpel intrax8 mpeg_er qpeldsp startcode"
2058 vc1image_decoder_select="vc1_decoder"
2059 vorbis_decoder_select="mdct"
2060 vorbis_encoder_select="mdct"
2061 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2062 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2063 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2064 vp6a_decoder_select="vp6_decoder"
2065 vp6f_decoder_select="vp6_decoder"
2066 vp7_decoder_select="h264pred videodsp vp8dsp"
2067 vp8_decoder_select="h264pred videodsp vp8dsp"
2068 vp9_decoder_select="videodsp"
2069 webp_decoder_select="vp8_decoder"
2070 wmapro_decoder_select="mdct sinewin wma_freqs"
2071 wmav1_decoder_select="mdct sinewin wma_freqs"
2072 wmav1_encoder_select="mdct sinewin wma_freqs"
2073 wmav2_decoder_select="mdct sinewin wma_freqs"
2074 wmav2_encoder_select="mdct sinewin wma_freqs"
2075 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2076 wmv1_decoder_select="h263_decoder"
2077 wmv1_encoder_select="h263_encoder"
2078 wmv2_decoder_select="blockdsp h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2079 wmv2_encoder_select="h263_encoder wmv2dsp"
2080 wmv3_decoder_select="vc1_decoder"
2081 wmv3image_decoder_select="wmv3_decoder"
2082 zerocodec_decoder_deps="zlib"
2083 zlib_decoder_deps="zlib"
2084 zlib_encoder_deps="zlib"
2085 zmbv_decoder_deps="zlib"
2086 zmbv_encoder_deps="zlib"
2087
2088 # hardware accelerators
2089 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2090 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2091 vaapi_deps="va_va_h"
2092 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2093 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2094 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2095
2096 h263_vaapi_hwaccel_deps="vaapi"
2097 h263_vaapi_hwaccel_select="h263_decoder"
2098 h264_d3d11va_hwaccel_deps="d3d11va"
2099 h264_d3d11va_hwaccel_select="h264_decoder"
2100 h264_dxva2_hwaccel_deps="dxva2"
2101 h264_dxva2_hwaccel_select="h264_decoder"
2102 h264_mmal_decoder_deps="mmal"
2103 h264_mmal_hwaccel_deps="mmal"
2104 h264_mmal_decoder_select="h264_decoder"
2105 h264_mmal_encoder_deps="mmal"
2106 h264_qsv_hwaccel_deps="libmfx"
2107 h264_vaapi_hwaccel_deps="vaapi"
2108 h264_vaapi_hwaccel_select="h264_decoder"
2109 h264_vda_hwaccel_deps="vda"
2110 h264_vda_hwaccel_select="h264_decoder"
2111 h264_vda_old_hwaccel_deps="vda"
2112 h264_vda_old_hwaccel_select="h264_decoder"
2113 h264_vdpau_hwaccel_deps="vdpau"
2114 h264_vdpau_hwaccel_select="h264_decoder"
2115 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2116 hevc_d3d11va_hwaccel_select="hevc_decoder"
2117 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2118 hevc_dxva2_hwaccel_select="hevc_decoder"
2119 hevc_qsv_hwaccel_deps="libmfx"
2120 mpeg1_vdpau_hwaccel_deps="vdpau"
2121 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2122 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2123 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2124 mpeg2_dxva2_hwaccel_deps="dxva2"
2125 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2126 mpeg2_qsv_hwaccel_deps="libmfx"
2127 mpeg2_vaapi_hwaccel_deps="vaapi"
2128 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2129 mpeg2_vdpau_hwaccel_deps="vdpau"
2130 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2131 mpeg4_vaapi_hwaccel_deps="vaapi"
2132 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2133 mpeg4_vdpau_hwaccel_deps="vdpau"
2134 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2135 vc1_d3d11va_hwaccel_deps="d3d11va"
2136 vc1_d3d11va_hwaccel_select="vc1_decoder"
2137 vc1_dxva2_hwaccel_deps="dxva2"
2138 vc1_dxva2_hwaccel_select="vc1_decoder"
2139 vc1_vaapi_hwaccel_deps="vaapi"
2140 vc1_vaapi_hwaccel_select="vc1_decoder"
2141 vc1_vdpau_hwaccel_deps="vdpau"
2142 vc1_vdpau_hwaccel_select="vc1_decoder"
2143 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2144 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2145 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2146 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2147
2148 # parsers
2149 h264_parser_select="h264_decoder"
2150 hevc_parser_select="golomb"
2151 mpegvideo_parser_select="mpegvideo"
2152 mpeg4video_parser_select="error_resilience h263dsp mpeg_er mpegvideo qpeldsp"
2153 vc1_parser_select="mpegvideo startcode vc1_decoder"
2154
2155 # bitstream_filters
2156 mjpeg2jpeg_bsf_select="jpegtables"
2157
2158 # external libraries
2159 libdcadec_decoder_deps="libdcadec"
2160 libfaac_encoder_deps="libfaac"
2161 libfaac_encoder_select="audio_frame_queue"
2162 libfdk_aac_decoder_deps="libfdk_aac"
2163 libfdk_aac_encoder_deps="libfdk_aac"
2164 libfdk_aac_encoder_select="audio_frame_queue"
2165 libgsm_decoder_deps="libgsm"
2166 libgsm_encoder_deps="libgsm"
2167 libgsm_ms_decoder_deps="libgsm"
2168 libgsm_ms_encoder_deps="libgsm"
2169 libilbc_decoder_deps="libilbc"
2170 libilbc_encoder_deps="libilbc"
2171 libkvazaar_encoder_deps="libkvazaar"
2172 libmp3lame_encoder_deps="libmp3lame"
2173 libmp3lame_encoder_select="audio_frame_queue"
2174 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2175 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2176 libopencore_amrnb_encoder_select="audio_frame_queue"
2177 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2178 libopenh264_encoder_deps="libopenh264"
2179 libopenjpeg_decoder_deps="libopenjpeg"
2180 libopenjpeg_encoder_deps="libopenjpeg"
2181 libopus_decoder_deps="libopus"
2182 libopus_encoder_deps="libopus"
2183 libopus_encoder_select="audio_frame_queue"
2184 libschroedinger_decoder_deps="libschroedinger"
2185 libschroedinger_encoder_deps="libschroedinger"
2186 libspeex_decoder_deps="libspeex"
2187 libspeex_encoder_deps="libspeex"
2188 libspeex_encoder_select="audio_frame_queue"
2189 libtheora_encoder_deps="libtheora"
2190 libtwolame_encoder_deps="libtwolame"
2191 libvo_aacenc_encoder_deps="libvo_aacenc"
2192 libvo_aacenc_encoder_select="audio_frame_queue"
2193 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2194 libvorbis_encoder_deps="libvorbis"
2195 libvorbis_encoder_select="audio_frame_queue"
2196 libvpx_vp8_decoder_deps="libvpx"
2197 libvpx_vp8_encoder_deps="libvpx"
2198 libvpx_vp9_decoder_deps="libvpx"
2199 libvpx_vp9_encoder_deps="libvpx"
2200 libwavpack_encoder_deps="libwavpack"
2201 libwebp_encoder_deps="libwebp"
2202 libx262_encoder_deps="libx262"
2203 libx264_encoder_deps="libx264"
2204 libx265_encoder_deps="libx265"
2205 libxavs_encoder_deps="libxavs"
2206 libxvid_encoder_deps="libxvid"
2207
2208 # demuxers / muxers
2209 ac3_demuxer_select="ac3_parser"
2210 asf_demuxer_select="riffdec"
2211 asf_muxer_select="riffenc"
2212 asf_stream_muxer_select="asf_muxer"
2213 avi_demuxer_select="riffdec"
2214 avi_muxer_select="riffenc"
2215 avisynth_demuxer_deps="avisynth"
2216 avisynth_demuxer_select="riffdec"
2217 caf_demuxer_select="riffdec"
2218 dash_muxer_select="mp4_muxer"
2219 dirac_demuxer_select="dirac_parser"
2220 dv_demuxer_select="dvprofile"
2221 dv_muxer_select="dvprofile"
2222 dxa_demuxer_select="riffdec"
2223 eac3_demuxer_select="ac3_parser"
2224 f4v_muxer_select="mov_muxer"
2225 flac_demuxer_select="flac_parser"
2226 hds_muxer_select="flv_muxer"
2227 hls_muxer_select="mpegts_muxer"
2228 ipod_muxer_select="mov_muxer"
2229 ismv_muxer_select="mov_muxer"
2230 matroska_audio_muxer_select="matroska_muxer"
2231 matroska_demuxer_select="riffdec"
2232 matroska_demuxer_suggest="bzlib lzo zlib"
2233 matroska_muxer_select="riffenc"
2234 mmf_muxer_select="riffenc"
2235 mov_demuxer_select="riffdec"
2236 mov_demuxer_suggest="zlib"
2237 mov_muxer_select="riffenc rtpenc_chain"
2238 mp3_demuxer_select="mpegaudio_parser"
2239 mp4_muxer_select="mov_muxer"
2240 mpegts_muxer_select="adts_muxer latm_muxer"
2241 mpegtsraw_demuxer_select="mpegts_demuxer"
2242 mxf_d10_muxer_select="mxf_muxer"
2243 nut_muxer_select="riffenc"
2244 nuv_demuxer_select="riffdec"
2245 oga_muxer_select="ogg_muxer"
2246 ogg_demuxer_select="dirac_parse"
2247 opus_muxer_select="ogg_muxer"
2248 psp_muxer_select="mov_muxer"
2249 rtp_demuxer_select="sdp_demuxer"
2250 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol"
2251 rtsp_demuxer_select="http_protocol rtpdec"
2252 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2253 sap_demuxer_select="sdp_demuxer"
2254 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2255 sdp_demuxer_select="rtpdec"
2256 smoothstreaming_muxer_select="ismv_muxer"
2257 spdif_muxer_select="aac_parser"
2258 spx_muxer_select="ogg_muxer"
2259 tak_demuxer_select="tak_parser"
2260 tg2_muxer_select="mov_muxer"
2261 tgp_muxer_select="mov_muxer"
2262 w64_demuxer_select="wav_demuxer"
2263 wav_demuxer_select="riffdec"
2264 wav_muxer_select="riffenc"
2265 webm_muxer_select="riffenc"
2266 webm_muxer_suggest="libopus_encoder libvorbis_encoder libvpx_vp8_encoder libvpx_vp9_encoder"
2267 wtv_demuxer_select="riffdec"
2268 xmv_demuxer_select="riffdec"
2269 xwma_demuxer_select="riffdec"
2270
2271 # indevs / outdevs
2272 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2273 alsa_outdev_deps="alsa_asoundlib_h"
2274 avfoundation_indev_deps="AVFoundation_AVFoundation_h"
2275 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2276 dv1394_indev_deps="dv1394"
2277 dv1394_indev_select="dv_demuxer"
2278 fbdev_indev_deps="linux_fb_h"
2279 jack_indev_deps="jack_jack_h pthreads"
2280 libcdio_indev_deps="libcdio"
2281 libdc1394_indev_deps="libdc1394"
2282 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2283 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2284 pulse_indev_deps="libpulse"
2285 sndio_indev_deps="sndio_h"
2286 sndio_outdev_deps="sndio_h"
2287 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2288 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2289 vfwcap_indev_extralibs="-lavicap32"
2290 x11grab_indev_deps="x11grab"
2291 x11grab_xcb_indev_deps="libxcb"
2292
2293 # protocols
2294 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2295 ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
2296 ffrtmpcrypt_protocol_select="tcp_protocol"
2297 ffrtmphttp_protocol_deps="!librtmp_protocol"
2298 ffrtmphttp_protocol_select="http_protocol"
2299 gopher_protocol_select="network"
2300 http_protocol_select="tcp_protocol"
2301 httpproxy_protocol_select="tcp_protocol"
2302 https_protocol_select="tls_protocol"
2303 icecast_protocol_select="http_protocol"
2304 librtmp_protocol_deps="librtmp"
2305 librtmpe_protocol_deps="librtmp"
2306 librtmps_protocol_deps="librtmp"
2307 librtmpt_protocol_deps="librtmp"
2308 librtmpte_protocol_deps="librtmp"
2309 mmsh_protocol_select="http_protocol"
2310 mmst_protocol_select="network"
2311 rtmp_protocol_deps="!librtmp_protocol"
2312 rtmp_protocol_select="tcp_protocol"
2313 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2314 rtmps_protocol_deps="!librtmp_protocol"
2315 rtmps_protocol_select="tls_protocol"
2316 rtmpt_protocol_select="ffrtmphttp_protocol"
2317 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2318 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2319 rtp_protocol_select="udp_protocol"
2320 sctp_protocol_deps="struct_sctp_event_subscribe"
2321 sctp_protocol_select="network"
2322 srtp_protocol_select="rtp_protocol"
2323 tcp_protocol_select="network"
2324 tls_gnutls_protocol_deps="gnutls"
2325 tls_gnutls_protocol_select="tcp_protocol"
2326 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
2327 tls_openssl_protocol_select="tcp_protocol"
2328 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2329 udp_protocol_select="network"
2330 unix_protocol_deps="sys_un_h"
2331 unix_protocol_select="network"
2332
2333 # filters
2334 blackframe_filter_deps="gpl"
2335 boxblur_filter_deps="gpl"
2336 bs2b_filter_deps="libbs2b"
2337 cropdetect_filter_deps="gpl"
2338 delogo_filter_deps="gpl"
2339 drawtext_filter_deps="libfreetype"
2340 frei0r_filter_deps="frei0r dlopen"
2341 frei0r_filter_extralibs='$ldl'
2342 frei0r_src_filter_deps="frei0r dlopen"
2343 frei0r_src_filter_extralibs='$ldl'
2344 hqdn3d_filter_deps="gpl"
2345 interlace_filter_deps="gpl"
2346 ocv_filter_deps="libopencv"
2347 resample_filter_deps="avresample"
2348 scale_filter_deps="swscale"
2349
2350 # examples
2351 avcodec_example_deps="avcodec avutil"
2352 filter_audio_example_deps="avfilter avutil"
2353 metadata_example_deps="avformat avutil"
2354 output_example_deps="avcodec avformat avutil swscale"
2355 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder vaapi_x11"
2356 transcode_aac_example_deps="avcodec avformat avresample"
2357
2358 # libraries, in linking order
2359 avcodec_deps="avutil"
2360 avdevice_deps="avformat avcodec avutil"
2361 avfilter_deps="avutil"
2362 avformat_deps="avcodec avutil"
2363 avresample_deps="avutil"
2364 swscale_deps="avutil"
2365
2366 # programs
2367 avconv_deps="avcodec avfilter avformat avresample swscale"
2368 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2369                fps_filter null_filter resample_filter scale_filter
2370                setpts_filter trim_filter"
2371 avplay_deps="avcodec avformat avresample swscale sdl"
2372 avplay_libs='$sdl_libs'
2373 avplay_select="rdft transpose_filter hflip_filter vflip_filter"
2374 avprobe_deps="avcodec avformat"
2375
2376 # documentation
2377 pod2man_deps="doc"
2378 texi2html_deps="doc"
2379
2380 # default parameters
2381
2382 logfile="config.log"
2383
2384 # installation paths
2385 prefix_default="/usr/local"
2386 bindir_default='${prefix}/bin'
2387 datadir_default='${prefix}/share/avconv'
2388 docdir_default='${prefix}/share/doc/libav'
2389 incdir_default='${prefix}/include'
2390 libdir_default='${prefix}/lib'
2391 mandir_default='${prefix}/share/man'
2392 shlibdir_default="$libdir_default"
2393
2394 # toolchain
2395 ar_default="ar"
2396 cc_default="gcc"
2397 host_cc_default="gcc"
2398 cp_f="cp -f"
2399 ln_s="ln -s -f"
2400 nm_default="nm -g"
2401 objformat="elf"
2402 pkg_config_default=pkg-config
2403 ranlib="ranlib"
2404 strip="strip"
2405 yasmexe="yasm"
2406
2407 # machine
2408 arch_default=$(uname -m)
2409 cpu="generic"
2410 intrinsics="none"
2411
2412 # OS
2413 target_os_default=$(tolower $(uname -s))
2414 host_os=$target_os_default
2415
2416 # configurable options
2417 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2418
2419 enable asm
2420 enable debug
2421 enable doc
2422 enable faan faandct faanidct
2423 enable optimizations
2424 enable safe_bitstream_reader
2425 enable static
2426 enable swscale_alpha
2427 enable valgrind_backtrace
2428
2429 # By default, enable only those hwaccels that have no external dependencies.
2430 enable d3d11va dxva2 vda vdpau
2431
2432 # build settings
2433 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2434 LIBPREF="lib"
2435 LIBSUF=".a"
2436 FULLNAME='$(NAME)$(BUILDSUF)'
2437 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2438 SLIBPREF="lib"
2439 SLIBSUF=".so"
2440 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2441 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2442 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2443 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2444 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2445 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2446
2447 asflags_filter=echo
2448 cflags_filter=echo
2449 ldflags_filter=echo
2450
2451 AS_C='-c'
2452 AS_O='-o $@'
2453 CC_C='-c'
2454 CC_E='-E -o $@'
2455 CC_O='-o $@'
2456 OBJCC_C='-c'
2457 OBJCC_E='-E -o $@'
2458 OBJCC_O='-o $@'
2459 LD_O='-o $@'
2460 LD_LIB='-l%'
2461 LD_PATH='-L'
2462 HOSTCC_C='-c'
2463 HOSTCC_E='-E -o $@'
2464 HOSTCC_O='-o $@'
2465 HOSTLD_O='-o $@'
2466
2467 host_libs='-lm'
2468 host_cflags_filter=echo
2469 host_ldflags_filter=echo
2470
2471 target_path='$(CURDIR)'
2472
2473 # since the object filename is not given with the -MM flag, the compiler
2474 # is only able to print the basename, and we must add the path ourselves
2475 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2476 DEPFLAGS='-MM'
2477
2478 # find source path
2479 if test -f configure; then
2480     source_path=.
2481 else
2482     source_path=$(cd $(dirname "$0"); pwd)
2483     echo "$source_path" | grep -q '[[:blank:]]' &&
2484         die "Out of tree builds are impossible with whitespace in source path."
2485     test -e "$source_path/config.h" &&
2486         die "Out of tree builds are impossible with config.h in source dir."
2487 fi
2488
2489 for v in "$@"; do
2490     r=${v#*=}
2491     l=${v%"$r"}
2492     r=$(sh_quote "$r")
2493     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2494 done
2495
2496 find_things(){
2497     thing=$1
2498     pattern=$2
2499     file=$source_path/$3
2500     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2501 }
2502
2503 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2504 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2505 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2506 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2507 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2508 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2509 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2510 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2511 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2512 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2513 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2514
2515 ALL_COMPONENTS="
2516     $BSF_LIST
2517     $DECODER_LIST
2518     $DEMUXER_LIST
2519     $ENCODER_LIST
2520     $FILTER_LIST
2521     $HWACCEL_LIST
2522     $INDEV_LIST
2523     $MUXER_LIST
2524     $OUTDEV_LIST
2525     $PARSER_LIST
2526     $PROTOCOL_LIST
2527 "
2528
2529 for n in $COMPONENT_LIST; do
2530     v=$(toupper ${n%s})_LIST
2531     eval enable \$$v
2532     eval ${n}_if_any="\$$v"
2533 done
2534
2535 enable $ARCH_EXT_LIST
2536
2537 die_unknown(){
2538     echo "Unknown option \"$1\"."
2539     echo "See $0 --help for available options."
2540     exit 1
2541 }
2542
2543 print_3_columns() {
2544     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2545 }
2546
2547 show_list() {
2548     suffix=_$1
2549     shift
2550     echo $* | sed s/$suffix//g | print_3_columns
2551     exit 0
2552 }
2553
2554 rand_list(){
2555     IFS=', '
2556     set -- $*
2557     unset IFS
2558     for thing; do
2559         comp=${thing%:*}
2560         prob=${thing#$comp}
2561         prob=${prob#:}
2562         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2563         echo "prob ${prob:-0.5}"
2564         printf '%s\n' $comp
2565     done
2566 }
2567
2568 do_random(){
2569     action=$1
2570     shift
2571     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2572     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2573 }
2574
2575 for opt do
2576     optval="${opt#*=}"
2577     case "$opt" in
2578         --extra-ldflags=*)
2579             add_ldflags $optval
2580         ;;
2581         --extra-ldexeflags=*)
2582             add_ldexeflags $optval
2583         ;;
2584         --extra-libs=*)
2585             add_extralibs $optval
2586         ;;
2587         --disable-devices)
2588             disable $INDEV_LIST $OUTDEV_LIST
2589         ;;
2590         --enable-debug=*)
2591             debuglevel="$optval"
2592         ;;
2593         --disable-programs)
2594             disable $PROGRAM_LIST
2595         ;;
2596         --disable-everything)
2597             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2598         ;;
2599         --disable-all)
2600             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2601             disable $LIBRARY_LIST $PROGRAM_LIST doc
2602         ;;
2603         --enable-random|--disable-random)
2604             action=${opt%%-random}
2605             do_random ${action#--} $COMPONENT_LIST
2606         ;;
2607         --enable-random=*|--disable-random=*)
2608             action=${opt%%-random=*}
2609             do_random ${action#--} $optval
2610         ;;
2611         --enable-*=*|--disable-*=*)
2612             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2613             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2614             eval list=\$$(toupper $thing)_LIST
2615             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2616             $action $(filter "$name" $list)
2617         ;;
2618         --enable-avserver|--disable-avserver*)
2619             warn "avserver has been removed, the ${opt} option is only"\
2620                  "provided for compatibility and will be removed in the future"
2621         ;;
2622         --enable-?*|--disable-?*)
2623             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2624             if is_in $option $COMPONENT_LIST; then
2625                 test $action = disable && action=unset
2626                 eval $action \$$(toupper ${option%s})_LIST
2627             elif is_in $option $CMDLINE_SELECT; then
2628                 $action $option
2629             else
2630                 die_unknown $opt
2631             fi
2632         ;;
2633         --list-*)
2634             NAME="${opt#--list-}"
2635             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2636             NAME=${NAME%s}
2637             eval show_list $NAME \$$(toupper $NAME)_LIST
2638         ;;
2639         --help|-h) show_help
2640         ;;
2641         *)
2642             optname="${opt%%=*}"
2643             optname="${optname#--}"
2644             optname=$(echo "$optname" | sed 's/-/_/g')
2645             if is_in $optname $CMDLINE_SET; then
2646                 eval $optname='$optval'
2647             elif is_in $optname $CMDLINE_APPEND; then
2648                 append $optname "$optval"
2649             else
2650                 die_unknown $opt
2651             fi
2652         ;;
2653     esac
2654 done
2655
2656 for e in $env; do
2657     eval "export $e"
2658 done
2659
2660 disabled logging && logfile=/dev/null
2661
2662 # Disable all the library-specific components if the library itself
2663 # is disabled, see AVCODEC_LIST and following _LIST variables.
2664
2665 disable_components(){
2666     disabled ${1} && disable $(
2667         eval components="\$$(toupper ${1})_COMPONENTS"
2668         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2669     )
2670 }
2671
2672 map 'disable_components $v' $LIBRARY_LIST
2673
2674 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2675 set >> $logfile
2676
2677 case "$toolchain" in
2678     clang-asan)
2679         cc_default="clang"
2680         add_cflags  -fsanitize=address
2681         add_ldflags -fsanitize=address
2682     ;;
2683     clang-tsan)
2684         cc_default="clang"
2685         add_cflags  -fsanitize=thread -pie
2686         add_ldflags -fsanitize=thread -pie
2687     ;;
2688     clang-usan)
2689         cc_default="clang"
2690         add_cflags  -fsanitize=undefined -O1
2691         add_ldflags -fsanitize=undefined
2692     ;;
2693     gcc-asan)
2694         cc_default="gcc"
2695         add_cflags  -fsanitize=address
2696         add_ldflags -fsanitize=address
2697     ;;
2698     gcc-tsan)
2699         cc_default="gcc"
2700         add_cflags  -fsanitize=thread -pie -fPIC
2701         add_ldflags -fsanitize=thread -pie -fPIC
2702     ;;
2703     gcc-usan)
2704         cc_default="gcc"
2705         add_cflags  -fsanitize=undefined
2706         add_ldflags -fsanitize=undefined
2707     ;;
2708     valgrind-massif)
2709         target_exec_default="valgrind"
2710         target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2711     ;;
2712     valgrind-memcheck)
2713         target_exec_default="valgrind"
2714         target_exec_args="--track-origins=yes --leak-check=full"
2715     ;;
2716     msvc)
2717         # Check whether the current MSVC version needs the C99 converter.
2718         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2719         # support enough of C99 to build libav. Default to the new
2720         # behaviour if the regexp was unable to match anything, since this
2721         # successfully parses the version number of existing supported
2722         # versions that require the converter (MSVC 2010 and 2012).
2723         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2724         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2725             cc_default="cl"
2726         else
2727             cc_default="c99wrap cl"
2728         fi
2729         ld_default="$source_path/compat/windows/mslink"
2730         nm_default="dumpbin -symbols"
2731         ar_default="lib"
2732         case "$arch" in
2733         arm*)
2734             as_default="armasm"
2735             ;;
2736         esac
2737         target_os_default="win32"
2738         # Use a relative path for TMPDIR. This makes sure all the
2739         # ffconf temp files are written with a relative path, avoiding
2740         # issues with msys/win32 path conversion for MSVC parameters
2741         # such as -Fo<file> or -out:<file>.
2742         TMPDIR=.
2743     ;;
2744     icl)
2745         cc_default="icl"
2746         ld_default="xilink"
2747         nm_default="dumpbin -symbols"
2748         ar_default="xilib"
2749         target_os_default="win32"
2750         TMPDIR=.
2751     ;;
2752     gcov)
2753         add_cflags  -fprofile-arcs -ftest-coverage
2754         add_ldflags -fprofile-arcs -ftest-coverage
2755     ;;
2756     hardened)
2757         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2758         add_cflags   -fno-strict-overflow -fstack-protector-all
2759         add_ldflags  -Wl,-z,relro -Wl,-z,now
2760     ;;
2761     ?*)
2762         die "Unknown toolchain $toolchain"
2763     ;;
2764 esac
2765
2766 test -n "$cross_prefix" && enable cross_compile
2767
2768 if enabled cross_compile; then
2769     test -n "$arch" && test -n "$target_os" ||
2770         die "Must specify target arch and OS when cross-compiling"
2771 fi
2772
2773 ar_default="${cross_prefix}${ar_default}"
2774 cc_default="${cross_prefix}${cc_default}"
2775 occ_default="${cross_prefix}${occ_default}"
2776 nm_default="${cross_prefix}${nm_default}"
2777 pkg_config_default="${cross_prefix}${pkg_config_default}"
2778 ranlib="${cross_prefix}${ranlib}"
2779 strip="${cross_prefix}${strip}"
2780
2781 sysinclude_default="${sysroot}/usr/include"
2782
2783 set_default arch cc pkg_config sysinclude target_exec target_os
2784 enabled cross_compile || host_cc_default=$cc
2785 set_default host_cc
2786
2787 if ! $pkg_config --version >/dev/null 2>&1; then
2788     warn "$pkg_config not found, library detection may fail."
2789     pkg_config=false
2790 fi
2791
2792 exesuf() {
2793     case $1 in
2794         mingw32*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2795     esac
2796 }
2797
2798 EXESUF=$(exesuf $target_os)
2799 HOSTEXESUF=$(exesuf $host_os)
2800
2801 # set temporary file name
2802 : ${TMPDIR:=$TEMPDIR}
2803 : ${TMPDIR:=$TMP}
2804 : ${TMPDIR:=/tmp}
2805
2806 if ! check_cmd mktemp -u XXXXXX; then
2807     # simple replacement for missing mktemp
2808     # NOT SAFE FOR GENERAL USE
2809     mktemp(){
2810         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2811     }
2812 fi
2813
2814 tmpfile(){
2815     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2816         (set -C; exec > $tmp) 2>/dev/null ||
2817         die "Unable to create temporary file in $TMPDIR."
2818     append TMPFILES $tmp
2819     eval $1=$tmp
2820 }
2821
2822 trap 'rm -f -- $TMPFILES' EXIT
2823
2824 tmpfile TMPASM .asm
2825 tmpfile TMPC   .c
2826 tmpfile TMPE   $EXESUF
2827 tmpfile TMPH   .h
2828 tmpfile TMPO   .o
2829 tmpfile TMPS   .S
2830 tmpfile TMPSH  .sh
2831 tmpfile TMPV   .ver
2832
2833 unset -f mktemp
2834
2835 chmod +x $TMPE
2836
2837 # make sure we can execute files in $TMPDIR
2838 cat > $TMPSH 2>> $logfile <<EOF
2839 #! /bin/sh
2840 EOF
2841 chmod +x $TMPSH >> $logfile 2>&1
2842 if ! $TMPSH >> $logfile 2>&1; then
2843     cat <<EOF
2844 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2845 variable to another directory and make sure that it is not mounted noexec.
2846 EOF
2847     die "Sanity test failed."
2848 fi
2849
2850 armasm_flags(){
2851     for flag; do
2852         case $flag in
2853             # Filter out MSVC cl.exe options from cflags that shouldn't
2854             # be passed to gas-preprocessor
2855             -M[TD]*)                                            ;;
2856             *)                  echo $flag                      ;;
2857         esac
2858    done
2859 }
2860
2861 ccc_flags(){
2862     for flag; do
2863         case $flag in
2864             -std=c99)           echo -c99                       ;;
2865             -mcpu=*)            echo -arch ${flag#*=}           ;;
2866             -mieee)             echo -ieee                      ;;
2867             -O*|-fast)          echo $flag                      ;;
2868             -fno-math-errno)    echo -assume nomath_errno       ;;
2869             -g)                 echo -g3                        ;;
2870             -Wall)              echo -msg_enable level2         ;;
2871             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2872             -Wl,*)              echo $flag                      ;;
2873             -f*|-W*)                                            ;;
2874             *)                  echo $flag                      ;;
2875         esac
2876    done
2877 }
2878
2879 cparser_flags(){
2880     for flag; do
2881         case $flag in
2882             -Wno-switch)             echo -Wno-switch-enum ;;
2883             -Wno-format-zero-length) ;;
2884             -Wdisabled-optimization) ;;
2885             -Wno-pointer-sign)       echo -Wno-other ;;
2886             *)                       echo $flag ;;
2887         esac
2888     done
2889 }
2890
2891 msvc_common_flags(){
2892     for flag; do
2893         case $flag in
2894             # In addition to specifying certain flags under the compiler
2895             # specific filters, they must be specified here as well or else the
2896             # generic catch all at the bottom will print the original flag.
2897             -Wall)                ;;
2898             -std=c99)             ;;
2899             # Common flags
2900             -fomit-frame-pointer) ;;
2901             -g)                   echo -Z7 ;;
2902             -fno-math-errno)      ;;
2903             -fno-common)          ;;
2904             -fno-signed-zeros)    ;;
2905             -fPIC)                ;;
2906             -mthumb)              ;;
2907             -march=*)             ;;
2908             -lz)                  echo zlib.lib ;;
2909             -lavifil32)           echo vfw32.lib ;;
2910             -lavicap32)           echo vfw32.lib user32.lib ;;
2911             -l*)                  echo ${flag#-l}.lib ;;
2912             -L*)                  echo -libpath:${flag#-L} ;;
2913             *)                    echo $flag ;;
2914         esac
2915     done
2916 }
2917
2918 msvc_flags(){
2919     msvc_common_flags "$@"
2920     for flag; do
2921         case $flag in
2922             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
2923                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
2924                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
2925                                        -wd4273 -wd4554 -wd4701 ;;
2926         esac
2927     done
2928 }
2929
2930 icl_flags(){
2931     msvc_common_flags "$@"
2932     for flag; do
2933         case $flag in
2934             # Despite what Intel's documentation says -Wall, which is supported
2935             # on Windows, does enable remarks so disable them here.
2936             -Wall)                echo $flag -Qdiag-disable:remark ;;
2937             -std=c99)             echo -Qstd=c99 ;;
2938         esac
2939     done
2940 }
2941
2942 pgi_flags(){
2943     for flag; do
2944         case $flag in
2945             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
2946             -fomit-frame-pointer) echo -Mnoframe ;;
2947             -g)                   echo -gopt ;;
2948             *)                    echo $flag ;;
2949         esac
2950     done
2951 }
2952
2953 suncc_flags(){
2954     for flag; do
2955         case $flag in
2956             -march=*|-mcpu=*)
2957                 case "${flag#*=}" in
2958                     native)                   echo -xtarget=native       ;;
2959                     v9|niagara)               echo -xarch=sparc          ;;
2960                     ultrasparc)               echo -xarch=sparcvis       ;;
2961                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
2962                     i586|pentium)             echo -xchip=pentium        ;;
2963                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
2964                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
2965                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
2966                     pentium4*)          echo -xtarget=pentium4           ;;
2967                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
2968                     *-sse3)             echo -xarch=sse3                 ;;
2969                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
2970                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
2971                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
2972                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
2973                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
2974                     k8|opteron|athlon64|athlon-fx)
2975                                                echo -xarch=sse2a         ;;
2976                     athlon*)                   echo -xarch=pentium_proa  ;;
2977                 esac
2978                 ;;
2979             -std=c99)             echo -xc99              ;;
2980             -fomit-frame-pointer) echo -xregs=frameptr    ;;
2981             -fPIC)                echo -KPIC -xcode=pic32 ;;
2982             -W*,*)                echo $flag              ;;
2983             -f*-*|-W*|-mimpure-text)                      ;;
2984             -shared)              echo -G                 ;;
2985             *)                    echo $flag              ;;
2986         esac
2987     done
2988 }
2989
2990 tms470_flags(){
2991     for flag; do
2992         case $flag in
2993             -march=*|-mcpu=*)
2994                 case "${flag#*=}" in
2995                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
2996                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
2997                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
2998                     armv6*|arm11*)          echo -mv=6   ;;
2999                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3000                                             echo -mv=5e  ;;
3001                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3002                 esac
3003                 ;;
3004             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3005             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3006             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3007             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3008             -msoft-float)   echo --float_support=vfplib       ;;
3009             -O[0-3]|-mf=*)  echo $flag                        ;;
3010             -g)             echo -g -mn                       ;;
3011             -pds=*)         echo $flag                        ;;
3012             -D*|-I*)        echo $flag                        ;;
3013             --gcc|--abi=*)  echo $flag                        ;;
3014             -me)            echo $flag                        ;;
3015         esac
3016     done
3017 }
3018
3019 probe_cc(){
3020     pfx=$1
3021     _cc=$2
3022
3023     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3024     unset _ld_o _ldflags _ld_lib _ld_path
3025     unset _depflags _DEPCMD _DEPFLAGS
3026     _flags_filter=echo
3027
3028     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3029         _type=llvm_gcc
3030         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3031         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3032         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3033         _cflags_speed='-O3'
3034         _cflags_size='-Os'
3035     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3036         _type=gcc
3037         gcc_version=$($_cc --version | head -n1)
3038         gcc_basever=$($_cc -dumpversion)
3039         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3040         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3041         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3042         if ! $_cc -dumpversion | grep -q '^2\.'; then
3043             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3044         fi
3045         _cflags_speed='-O3'
3046         _cflags_size='-Os'
3047     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3048         _type=icc
3049         _ident=$($_cc --version | head -n1)
3050         _depflags='-MMD'
3051         _cflags_speed='-O3'
3052         _cflags_size='-Os'
3053         _cflags_noopt='-O1'
3054     elif $_cc -v 2>&1 | grep -q xlc; then
3055         _type=xlc
3056         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3057         _cflags_speed='-O5'
3058         _cflags_size='-O5 -qcompact'
3059     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3060         _type=ccc
3061         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3062         _DEPFLAGS='-M'
3063         _cflags_speed='-fast'
3064         _cflags_size='-O1'
3065         _flags_filter=ccc_flags
3066     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3067         test -d "$sysroot" || die "No valid sysroot specified."
3068         _type=armcc
3069         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3070         armcc_conf="$PWD/armcc.conf"
3071         $_cc --arm_linux_configure                 \
3072              --arm_linux_config_file="$armcc_conf" \
3073              --configure_sysroot="$sysroot"        \
3074              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3075              die "Error creating armcc configuration file."
3076         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3077         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3078         as_default="${cross_prefix}gcc"
3079         _depflags='-MMD'
3080         _cflags_speed='-O3'
3081         _cflags_size='-Os'
3082     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3083         _type=tms470
3084         _ident=$($_cc -version | head -n1 | tr -s ' ')
3085         _flags='--gcc --abi=eabi -me'
3086         _cc_e='-ppl -fe=$@'
3087         _cc_o='-fe=$@'
3088         _depflags='-ppa -ppd=$(@:.o=.d)'
3089         _cflags_speed='-O3 -mf=5'
3090         _cflags_size='-O3 -mf=2'
3091         _flags_filter=tms470_flags
3092     elif $_cc -v 2>&1 | grep -q clang; then
3093         _type=clang
3094         _ident=$($_cc --version 2>/dev/null | head -n1)
3095         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3096         _cflags_speed='-O3'
3097         _cflags_size='-Os'
3098     elif $_cc -V 2>&1 | grep -q Sun; then
3099         _type=suncc
3100         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3101         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3102         _DEPFLAGS='-xM1 -xc99'
3103         _ldflags='-std=c99'
3104         _cflags_speed='-O5'
3105         _cflags_size='-O5 -xspace'
3106         _flags_filter=suncc_flags
3107     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3108         _type=pathscale
3109         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3110         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3111         _cflags_speed='-O2'
3112         _cflags_size='-Os'
3113         _flags_filter='filter_out -Wdisabled-optimization'
3114     elif $_cc -v 2>&1 | grep -q Open64; then
3115         _type=open64
3116         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3117         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3118         _cflags_speed='-O2'
3119         _cflags_size='-Os'
3120         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3121     elif $_cc -V 2>&1 | grep -q Portland; then
3122         _type=pgi
3123         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3124         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3125         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3126         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3127         _cflags_noopt="-O1"
3128         _flags_filter=pgi_flags
3129     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3130         _type=armasm
3131         _ident=$($_cc | head -n1)
3132         # 4509: "This form of conditional instruction is deprecated"
3133         _flags="-nologo -ignore 4509"
3134         _flags_filter=armasm_flags
3135     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3136         _type=msvc
3137         _ident=$($_cc 2>&1 | head -n1)
3138         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3139         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3140         _cflags_speed="-O2"
3141         _cflags_size="-O1"
3142         if $_cc -nologo- 2>&1 | grep -q Linker; then
3143             _ld_o='-out:$@'
3144         else
3145             _ld_o='-Fe$@'
3146         fi
3147         _cc_o='-Fo$@'
3148         _cc_e='-P -Fi$@'
3149         _flags_filter=msvc_flags
3150         _ld_lib='lib%.a'
3151         _ld_path='-libpath:'
3152         _flags='-nologo'
3153         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS'
3154     elif $_cc 2>&1 | grep -q Intel; then
3155         _type=icl
3156         _ident=$($_cc 2>&1 | head -n1)
3157         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3158         # Not only is O3 broken on 13.x+ but it is slower on all previous
3159         # versions (tested) as well.
3160         _cflags_speed="-O2"
3161         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3162         if $_cc 2>&1 | grep -q Linker; then
3163             _ld_o='-out:$@'
3164         else
3165             _ld_o='-Fe$@'
3166         fi
3167         _cc_o='-Fo$@'
3168         _cc_e='-P'
3169         _flags_filter=icl_flags
3170         _ld_lib='lib%.a'
3171         _ld_path='-libpath:'
3172         # -Qdiag-error to make icl error when seeing certain unknown arguments
3173         _flags='-nologo -Qdiag-error:4044,10157'
3174         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3175         # with MSVC which enables it by default.
3176         _cflags='-D_USE_MATH_DEFINES -Qms0 -Qvec- -Qsimd- -GS'
3177     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3178         _type=cparser
3179         _ident=$($_cc --version | head -n1)
3180         _depflags='-MMD'
3181         _cflags_speed='-O4'
3182         _cflags_size='-O2'
3183         _flags_filter=cparser_flags
3184     fi
3185
3186     eval ${pfx}_type=\$_type
3187     eval ${pfx}_ident=\$_ident
3188 }
3189
3190 set_ccvars(){
3191     eval ${1}_C=\${_cc_c-\${${1}_C}}
3192     eval ${1}_E=\${_cc_e-\${${1}_E}}
3193     eval ${1}_O=\${_cc_o-\${${1}_O}}
3194
3195     if [ -n "$_depflags" ]; then
3196         eval ${1}_DEPFLAGS=\$_depflags
3197     else
3198         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3199         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3200         eval DEP${1}FLAGS=\$_flags
3201     fi
3202 }
3203
3204 probe_cc cc "$cc"
3205 cflags_filter=$_flags_filter
3206 cflags_speed=$_cflags_speed
3207 cflags_size=$_cflags_size
3208 cflags_noopt=$_cflags_noopt
3209 add_cflags $_flags $_cflags
3210 cc_ldflags=$_ldflags
3211 set_ccvars CC
3212
3213 probe_cc hostcc "$host_cc"
3214 host_cflags_filter=$_flags_filter
3215 add_host_cflags  $_flags $_cflags
3216 set_ccvars HOSTCC
3217
3218 test -n "$cc_type" && enable $cc_type ||
3219     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3220
3221 : ${as_default:=$cc}
3222 : ${objcc_default:=$cc}
3223 : ${dep_cc_default:=$cc}
3224 : ${ld_default:=$cc}
3225 : ${host_ld_default:=$host_cc}
3226 set_default ar as objcc dep_cc ld host_ld
3227
3228 probe_cc as "$as"
3229 asflags_filter=$_flags_filter
3230 add_asflags $_flags $_cflags
3231 set_ccvars AS
3232
3233 probe_cc objcc "$objcc"
3234 objcflags_filter=$_flags_filter
3235 add_objcflags $_flags $_cflags
3236 set_ccvars OBJC
3237
3238 probe_cc ld "$ld"
3239 ldflags_filter=$_flags_filter
3240 add_ldflags $_flags $_ldflags
3241 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3242 LD_O=${_ld_o-$LD_O}
3243 LD_LIB=${_ld_lib-$LD_LIB}
3244 LD_PATH=${_ld_path-$LD_PATH}
3245
3246 probe_cc hostld "$host_ld"
3247 host_ldflags_filter=$_flags_filter
3248 add_host_ldflags $_flags $_ldflags
3249 HOSTLD_O=${_ld_o-$HOSTLD_O}
3250
3251 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3252     probe_cc depcc "$dep_cc"
3253     CCDEP=${_DEPCMD:-$DEPCMD}
3254     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3255     DEPCCFLAGS=$_flags
3256 fi
3257
3258 if $ar 2>&1 | grep -q Microsoft; then
3259     arflags="-nologo"
3260     ar_o='-out:$@'
3261 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3262     arflags="rq"
3263     ar_o='$@'
3264 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3265     arflags='-Xany -r -c'
3266     ar_o='$@'
3267 else
3268     arflags="rc"
3269     ar_o='$@'
3270 fi
3271
3272 add_cflags $extra_cflags
3273 add_objcflags $extra_objcflags
3274 add_asflags $extra_cflags
3275
3276 if test -n "$sysroot"; then
3277     case "$cc_type" in
3278         gcc|llvm_gcc|clang)
3279             add_cppflags --sysroot="$sysroot"
3280             add_ldflags --sysroot="$sysroot"
3281         ;;
3282         tms470)
3283             add_cppflags -I"$sysinclude"
3284             add_ldflags  --sysroot="$sysroot"
3285         ;;
3286     esac
3287 fi
3288
3289 if test "$cpu" = host; then
3290     enabled cross_compile &&
3291         die "--cpu=host makes no sense when cross-compiling."
3292
3293     case "$cc_type" in
3294         gcc|llvm_gcc)
3295             check_native(){
3296                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3297                 sed -n "/cc1.*$1=/{
3298                             s/.*$1=\\([^ ]*\\).*/\\1/
3299                             p
3300                             q
3301                         }" $TMPE
3302             }
3303             cpu=$(check_native -march || check_native -mcpu)
3304         ;;
3305     esac
3306
3307     test "${cpu:-host}" = host &&
3308         die "--cpu=host not supported with compiler $cc"
3309 fi
3310
3311 # Deal with common $arch aliases
3312 case "$arch" in
3313     aarch64|arm64)
3314         arch="aarch64"
3315     ;;
3316     arm*)
3317         arch="arm"
3318     ;;
3319     mips*|IP*)
3320         arch="mips"
3321     ;;
3322     parisc*|hppa*)
3323         arch="parisc"
3324     ;;
3325     "Power Macintosh"|ppc*|powerpc*)
3326         arch="ppc"
3327     ;;
3328     s390|s390x)
3329         arch="s390"
3330     ;;
3331     sh4|sh)
3332         arch="sh4"
3333     ;;
3334     sun4u|sparc*)
3335         arch="sparc"
3336     ;;
3337     tilegx|tile-gx)
3338         arch="tilegx"
3339     ;;
3340     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3341         arch="x86"
3342     ;;
3343 esac
3344
3345 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3346 enable $arch
3347
3348 # Add processor-specific flags
3349 if enabled aarch64; then
3350
3351     case $cpu in
3352         armv*)
3353             cpuflags="-march=$cpu"
3354         ;;
3355         *)
3356             cpuflags="-mcpu=$cpu"
3357         ;;
3358     esac
3359
3360 elif enabled alpha; then
3361
3362     cpuflags="-mcpu=$cpu"
3363
3364 elif enabled arm; then
3365
3366     check_arm_arch() {
3367         check_cpp_condition stddef.h \
3368             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3369             $cpuflags
3370     }
3371
3372     probe_arm_arch() {
3373         if   check_arm_arch 4;        then echo armv4;
3374         elif check_arm_arch 4T;       then echo armv4t;
3375         elif check_arm_arch 5;        then echo armv5;
3376         elif check_arm_arch 5E;       then echo armv5e;
3377         elif check_arm_arch 5T;       then echo armv5t;
3378         elif check_arm_arch 5TE;      then echo armv5te;
3379         elif check_arm_arch 5TEJ;     then echo armv5te;
3380         elif check_arm_arch 6;        then echo armv6;
3381         elif check_arm_arch 6J;       then echo armv6j;
3382         elif check_arm_arch 6K;       then echo armv6k;
3383         elif check_arm_arch 6Z;       then echo armv6z;
3384         elif check_arm_arch 6ZK;      then echo armv6zk;
3385         elif check_arm_arch 6T2;      then echo armv6t2;
3386         elif check_arm_arch 7;        then echo armv7;
3387         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3388         elif check_arm_arch 7S;       then echo armv7-a;
3389         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3390         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3391         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3392         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3393         fi
3394     }
3395
3396     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3397
3398     case $cpu in
3399         armv*)
3400             cpuflags="-march=$cpu"
3401             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3402         ;;
3403         *)
3404             cpuflags="-mcpu=$cpu"
3405             case $cpu in
3406                 cortex-a*)                               subarch=armv7a  ;;
3407                 cortex-r*)                               subarch=armv7r  ;;
3408                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3409                 arm11*)                                  subarch=armv6   ;;
3410                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3411                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3412                 *)                             subarch=$(probe_arm_arch) ;;
3413             esac
3414         ;;
3415     esac
3416
3417     case "$subarch" in
3418         armv5t*)    enable fast_clz                ;;
3419         armv[6-8]*) enable fast_clz fast_unaligned ;;
3420     esac
3421
3422 elif enabled avr32; then
3423
3424     case $cpu in
3425         ap7[02]0[0-2])
3426             subarch="avr32_ap"
3427             cpuflags="-mpart=$cpu"
3428         ;;
3429         ap)
3430             subarch="avr32_ap"
3431             cpuflags="-march=$cpu"
3432         ;;
3433         uc3[ab]*)
3434             subarch="avr32_uc"
3435             cpuflags="-mcpu=$cpu"
3436         ;;
3437         uc)
3438             subarch="avr32_uc"
3439             cpuflags="-march=$cpu"
3440         ;;
3441     esac
3442
3443 elif enabled bfin; then
3444
3445     cpuflags="-mcpu=$cpu"
3446
3447 elif enabled mips; then
3448
3449     cpuflags="-march=$cpu"
3450
3451 elif enabled ppc; then
3452
3453     disable ldbrx
3454
3455     case $(tolower $cpu) in
3456         601|ppc601|powerpc601)
3457             cpuflags="-mcpu=601"
3458             disable altivec
3459         ;;
3460         603*|ppc603*|powerpc603*)
3461             cpuflags="-mcpu=603"
3462             disable altivec
3463         ;;
3464         604*|ppc604*|powerpc604*)
3465             cpuflags="-mcpu=604"
3466             disable altivec
3467         ;;
3468         g3|75*|ppc75*|powerpc75*)
3469             cpuflags="-mcpu=750"
3470             disable altivec
3471         ;;
3472         g4|745*|ppc745*|powerpc745*)
3473             cpuflags="-mcpu=7450"
3474             disable vsx
3475         ;;
3476         74*|ppc74*|powerpc74*)
3477             cpuflags="-mcpu=7400"
3478             disable vsx
3479         ;;
3480         g5|970|ppc970|powerpc970)
3481             cpuflags="-mcpu=970"
3482             disable vsx
3483         ;;
3484         power[3-6]*)
3485             cpuflags="-mcpu=$cpu"
3486             disable vsx
3487         ;;
3488         power[7-8]*)
3489             cpuflags="-mcpu=$cpu"
3490             enable ldbrx
3491         ;;
3492         cell)
3493             cpuflags="-mcpu=cell"
3494             enable ldbrx
3495             disable vsx
3496         ;;
3497         e500mc)
3498             cpuflags="-mcpu=e500mc"
3499             disable altivec
3500         ;;
3501         e500v2)
3502             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3503             disable altivec
3504             disable dcbzl
3505         ;;
3506         e500)
3507             cpuflags="-mcpu=8540 -mhard-float"
3508             disable altivec
3509             disable dcbzl
3510         ;;
3511     esac
3512
3513 elif enabled sparc; then
3514
3515     case $cpu in
3516         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3517             cpuflags="-mcpu=$cpu"
3518         ;;
3519         ultrasparc*|niagara[234])
3520             cpuflags="-mcpu=$cpu"
3521         ;;
3522     esac
3523
3524 elif enabled x86; then
3525
3526     case $cpu in
3527         i[345]86|pentium)
3528             cpuflags="-march=$cpu"
3529             disable i686
3530             disable mmx
3531         ;;
3532         # targets that do NOT support nopl and conditional mov (cmov)
3533         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3534             cpuflags="-march=$cpu"
3535             disable i686
3536         ;;
3537         # targets that do support nopl and conditional mov (cmov)
3538         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3539             cpuflags="-march=$cpu"
3540             enable i686
3541             enable fast_cmov
3542         ;;
3543         # targets that do support conditional mov but on which it's slow
3544         pentium4|pentium4m|prescott|nocona)
3545             cpuflags="-march=$cpu"
3546             enable i686
3547             disable fast_cmov
3548         ;;
3549     esac
3550
3551 fi
3552
3553 if [ "$cpu" != generic ]; then
3554     add_cflags  $cpuflags
3555     add_asflags $cpuflags
3556     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3557 fi
3558
3559 # compiler sanity check
3560 check_exec <<EOF
3561 int main(void){ return 0; }
3562 EOF
3563 if test "$?" != 0; then
3564     echo "$cc is unable to create an executable file."
3565     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3566         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3567         echo "Only do this if you know what cross compiling means."
3568     fi
3569     die "C compiler test failed."
3570 fi
3571
3572 add_cppflags -D_ISOC99_SOURCE
3573 check_cflags -std=c99
3574 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3575 #include <stdlib.h>
3576 EOF
3577 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3578 #include <stdlib.h>
3579 EOF
3580
3581 add_host_cppflags -D_ISOC99_SOURCE
3582 check_host_cflags -std=c99
3583 check_host_cflags -Wall
3584 check_host_cflags -O3
3585
3586 check_64bit(){
3587     arch32=$1
3588     arch64=$2
3589     expr=$3
3590     check_code cc "" "int test[2*($expr) - 1]" &&
3591         subarch=$arch64 || subarch=$arch32
3592 }
3593
3594 case "$arch" in
3595     aarch64|alpha|ia64)
3596         spic=$shared
3597     ;;
3598     mips)
3599         check_64bit mips mips64 '_MIPS_SIM > 1'
3600         spic=$shared
3601     ;;
3602     parisc)
3603         check_64bit parisc parisc64 'sizeof(void *) > 4'
3604         spic=$shared
3605     ;;
3606     ppc)
3607         check_64bit ppc ppc64 'sizeof(void *) > 4'
3608         spic=$shared
3609     ;;
3610     s390)
3611         check_64bit s390 s390x 'sizeof(void *) > 4'
3612         spic=$shared
3613     ;;
3614     sparc)
3615         check_64bit sparc sparc64 'sizeof(void *) > 4'
3616         spic=$shared
3617     ;;
3618     x86)
3619         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3620         if test "$subarch" = "x86_64"; then
3621             spic=$shared
3622         fi
3623     ;;
3624 esac
3625
3626 enable $subarch
3627 enabled spic && enable_weak pic
3628
3629 # OS specific
3630 case $target_os in
3631     aix)
3632         SHFLAGS=-shared
3633         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3634         enabled shared && add_ldflags -Wl,-brtl
3635         ;;
3636     android)
3637         disable symver
3638         enable section_data_rel_ro
3639         SLIB_INSTALL_NAME='$(SLIBNAME)'
3640         SLIB_INSTALL_LINKS=
3641         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3642         ;;
3643     haiku)
3644         prefix_default="/boot/common"
3645         network_extralibs="-lnetwork"
3646         host_libs=
3647         ;;
3648     sunos)
3649         SHFLAGS='-shared -Wl,-h,$$(@F)'
3650         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3651         network_extralibs="-lsocket -lnsl"
3652         # When using suncc to build, the Solaris linker will mark
3653         # an executable with each instruction set encountered by
3654         # the Solaris assembler.  As our libraries contain their own
3655         # guards for processor-specific code, instead suppress
3656         # generation of the HWCAPS ELF section on Solaris x86 only.
3657         enabled_all suncc x86 &&
3658             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3659             add_ldflags -Wl,-M,mapfile
3660         nm_default='nm -P -g'
3661         SLIB_CREATE_DEF_CMD='$(Q)perl $(SRC_PATH)/compat/solaris/make_sunver.pl $$(filter %.ver,$$^) $(OBJS) | grep -v @ > $(SUBDIR)lib$(NAME).ver-sol2'
3662         ;;
3663     netbsd)
3664         disable symver
3665         oss_indev_extralibs="-lossaudio"
3666         oss_outdev_extralibs="-lossaudio"
3667         ;;
3668     openbsd|bitrig)
3669         disable symver
3670         SHFLAGS='-shared'
3671         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3672         SLIB_INSTALL_LINKS=
3673         oss_indev_extralibs="-lossaudio"
3674         oss_outdev_extralibs="-lossaudio"
3675         ;;
3676     dragonfly)
3677         disable symver
3678         ;;
3679     freebsd)
3680         ;;
3681     bsd/os)
3682         add_extralibs -lpoll -lgnugetopt
3683         ;;
3684     darwin)
3685         enabled ppc && add_asflags -force_cpusubtype_ALL
3686         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3687         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3688         add_ldflags -Wl,-dynamic,-search_paths_first
3689         SLIBSUF=".dylib"
3690         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3691         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3692         objformat="macho"
3693         enabled x86_64 && objformat="macho64"
3694         enabled_any pic shared ||
3695             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3696         ;;
3697     msys*)
3698         die "Native MSYS builds are discouraged, please use the MINGW environment.";
3699         ;;
3700     mingw32*)
3701         if test $target_os = "mingw32ce"; then
3702             disable network
3703         else
3704             target_os=mingw32
3705         fi
3706         LIBTARGET=i386
3707         if enabled x86_64; then
3708             LIBTARGET="i386:x86-64"
3709         elif enabled arm; then
3710             LIBTARGET=arm-wince
3711         fi
3712         check_ldflags -Wl,--nxcompat
3713         check_ldflags -Wl,--dynamicbase
3714         shlibdir_default="$bindir_default"
3715         SLIBPREF=""
3716         SLIBSUF=".dll"
3717         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3718         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3719         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3720         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3721         SLIB_INSTALL_LINKS=
3722         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3723         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3724         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3725         objformat="win32"
3726         dlltool="${cross_prefix}dlltool"
3727         ranlib=:
3728         enable dos_paths
3729         ;;
3730     win32|win64)
3731         disable symver
3732         if enabled shared; then
3733             # Link to the import library instead of the normal static library
3734             # for shared libs.
3735             LD_LIB='%.lib'
3736             # Cannot build both shared and static libs with MSVC or icl.
3737             disable static
3738         fi
3739         shlibdir_default="$bindir_default"
3740         SLIBPREF=""
3741         SLIBSUF=".dll"
3742         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3743         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3744         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3745         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3746         SLIB_INSTALL_LINKS=
3747         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3748         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3749         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3750         objformat="win32"
3751         ranlib=:
3752         enable dos_paths
3753         ;;
3754     cygwin*)
3755         target_os=cygwin
3756         shlibdir_default="$bindir_default"
3757         SLIBPREF="cyg"
3758         SLIBSUF=".dll"
3759         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3760         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3761         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3762         SLIB_INSTALL_LINKS=
3763         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3764         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3765         objformat="win32"
3766         enable dos_paths
3767         ;;
3768     *-dos|freedos|opendos)
3769         network_extralibs="-lsocket"
3770         objformat="coff"
3771         enable dos_paths
3772         add_cppflags -U__STRICT_ANSI__
3773         ;;
3774     linux)
3775         enable dv1394
3776         enable section_data_rel_ro
3777         ;;
3778     irix*)
3779         target_os=irix
3780         ranlib="echo ignoring ranlib"
3781         ;;
3782     os/2*)
3783         ln_s="cp -f"
3784         objformat="aout"
3785         add_cppflags -D_GNU_SOURCE
3786         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3787         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3788         LIBSUF="_s.a"
3789         SLIBPREF=""
3790         SLIBSUF=".dll"
3791         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3792         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3793         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3794             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3795             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3796             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3797             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3798         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3799             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3800         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3801         enable dos_paths
3802         ;;
3803     gnu/kfreebsd)
3804         add_cppflags -D_BSD_SOURCE
3805         ;;
3806     gnu)
3807         ;;
3808     qnx)
3809         add_cppflags -D_QNX_SOURCE
3810         network_extralibs="-lsocket"
3811         ;;
3812     symbian)
3813         SLIBSUF=".dll"
3814         enable dos_paths
3815         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3816         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3817         add_ldflags -Wl,--target1-abs,--no-undefined \
3818                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3819                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3820         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3821                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3822                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3823         ;;
3824     osf1)
3825         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3826         ;;
3827     minix)
3828         ;;
3829     plan9)
3830         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3831                      -D_REENTRANT_SOURCE        \
3832                      -D_RESEARCH_SOURCE         \
3833                      -DFD_SETSIZE=96            \
3834                      -DHAVE_SOCK_OPTS
3835         add_compat strtod.o strtod=avpriv_strtod
3836         network_extralibs='-lbsd'
3837         exeobjs=compat/plan9/main.o
3838         cp_f='cp'
3839         ;;
3840     none)
3841         ;;
3842     *)
3843         die "Unknown OS '$target_os'."
3844         ;;
3845 esac
3846
3847 # determine libc flavour
3848
3849 probe_libc(){
3850     pfx=$1
3851     pfx_no_=${pfx%_}
3852     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3853     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3854         eval ${pfx}libc_type=uclibc
3855         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3856     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3857         eval ${pfx}libc_type=glibc
3858         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3859     # MinGW headers can be installed on Cygwin, so check for newlib first.
3860     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3861         eval ${pfx}libc_type=newlib
3862         add_${pfx}cppflags -U__STRICT_ANSI__
3863     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3864     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3865         eval ${pfx}libc_type=mingw64
3866         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3867         eval test \$${pfx_no_}cc_type = "gcc" &&
3868             add_${pfx}cppflags -D__printf__=__gnu_printf__
3869     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3870          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3871         eval ${pfx}libc_type=mingw32
3872         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3873             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3874             die "ERROR: MinGW32 runtime version must be >= 3.15."
3875         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3876         eval test \$${pfx_no_}cc_type = "gcc" &&
3877             add_${pfx}cppflags -D__printf__=__gnu_printf__
3878     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3879         eval ${pfx}libc_type=msvcrt
3880         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
3881             if [ "$pfx" = host_ ]; then
3882                 add_host_cppflags -Dsnprintf=_snprintf
3883             else
3884                 add_compat strtod.o strtod=avpriv_strtod
3885                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3886                                              _snprintf=avpriv_snprintf  \
3887                                              vsnprintf=avpriv_vsnprintf
3888             fi
3889         fi
3890         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3891         # 0x601 by default unless something else is set by the user.
3892         # This can easily lead to us detecting functions only present
3893         # in such new versions and producing binaries requiring windows 7.0.
3894         # Therefore explicitly set the default to XP unless the user has
3895         # set something else on the command line.
3896         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
3897         # family. For these cases, configure is free to use any functions
3898         # found in the SDK headers by default. (Alternatively, we could force
3899         # _WIN32_WINNT to 0x0602 in that case.)
3900         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
3901             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
3902 #ifdef WINAPI_FAMILY
3903 #include <winapifamily.h>
3904 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
3905 #error not desktop
3906 #endif
3907 #endif
3908 EOF
3909     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
3910         eval ${pfx}libc_type=klibc
3911     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
3912         eval ${pfx}libc_type=bionic
3913     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
3914         eval ${pfx}libc_type=solaris
3915         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
3916     else
3917         eval ${pfx}libc_type=default
3918         add_${pfx}cppflags -D_DEFAULT_SOURCE
3919     fi
3920 }
3921
3922 probe_libc
3923 test -n "$libc_type" && enable libc_$libc_type
3924 probe_libc host_
3925 test -n "$host_libc_type" && enable host_libc_$host_libc_type
3926
3927 case $libc_type in
3928     bionic)
3929         add_compat strtod.o strtod=avpriv_strtod
3930         ;;
3931 esac
3932
3933 # hacks for compiler/libc/os combinations
3934
3935 if enabled_all tms470 libc_glibc; then
3936     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
3937     add_cppflags -D__USER_LABEL_PREFIX__=
3938     add_cppflags -D__builtin_memset=memset
3939     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
3940     add_cflags   -pds=48    # incompatible redefinition of macro
3941 fi
3942
3943 if enabled_all ccc libc_glibc; then
3944     add_ldflags -Wl,-z,now  # calls to libots crash without this
3945 fi
3946
3947 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
3948     add_cppflags '-I\$(SRC_PATH)/compat/float'
3949
3950 esc(){
3951     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
3952 }
3953
3954 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
3955
3956 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
3957
3958 set_default $PATHS_LIST
3959 set_default nm
3960
3961 # we need to build at least one lib type
3962 if ! enabled_any static shared; then
3963     cat <<EOF
3964 At least one library type must be built.
3965 Specify --enable-static to build the static libraries or --enable-shared to
3966 build the shared libraries as well. To only build the shared libraries specify
3967 --disable-static in addition to --enable-shared.
3968 EOF
3969     exit 1;
3970 fi
3971
3972 die_license_disabled() {
3973     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
3974 }
3975
3976 die_license_disabled gpl libcdio
3977 die_license_disabled gpl libx264
3978 die_license_disabled gpl libx265
3979 die_license_disabled gpl libxavs
3980 die_license_disabled gpl libxvid
3981 die_license_disabled gpl x11grab
3982
3983 die_license_disabled nonfree libfaac
3984 die_license_disabled nonfree libfdk_aac
3985 die_license_disabled nonfree nvenc
3986 die_license_disabled nonfree openssl
3987
3988 die_license_disabled version3 libopencore_amrnb
3989 die_license_disabled version3 libopencore_amrwb
3990 die_license_disabled version3 libvo_aacenc
3991 die_license_disabled version3 libvo_amrwbenc
3992
3993 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
3994
3995 disabled optimizations || check_cflags -fomit-frame-pointer
3996
3997 enable_weak_pic() {
3998     disabled pic && return
3999     enable pic
4000     add_cppflags -DPIC
4001     case "$target_os" in
4002     mingw*|cygwin*)
4003         ;;
4004     *)
4005         add_cflags -fPIC
4006         ;;
4007     esac
4008     add_asflags  -fPIC
4009 }
4010
4011 enabled pic && enable_weak_pic
4012
4013 check_cc <<EOF || die "Symbol mangling check failed."
4014 int ff_extern;
4015 EOF
4016 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4017 extern_prefix=${sym%%ff_extern*}
4018
4019 check_cc <<EOF && enable_weak inline_asm
4020 void foo(void) { __asm__ volatile ("" ::); }
4021 EOF
4022
4023 _restrict=
4024 for restrict_keyword in restrict __restrict__ __restrict; do
4025     check_cc <<EOF && _restrict=$restrict_keyword && break
4026 void foo(char * $restrict_keyword p);
4027 EOF
4028 done
4029
4030 check_cc <<EOF && enable pragma_deprecated
4031 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4032 EOF
4033
4034 check_cc <<EOF && enable attribute_packed
4035 struct { int x; } __attribute__((packed)) x;
4036 EOF
4037
4038 check_cc <<EOF && enable attribute_may_alias
4039 union { int x; } __attribute__((may_alias)) x;
4040 EOF
4041
4042 check_cc <<EOF || die "endian test failed"
4043 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4044 EOF
4045 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4046
4047 check_gas() {
4048     log "check_gas using '$as' as AS"
4049     # :vararg is used on aarch64, arm and ppc altivec
4050     check_as <<EOF || return 1
4051 .macro m n, y:vararg=0
4052 \n: .int \y
4053 .endm
4054 m x
4055 EOF
4056     # .altmacro is only used in arm asm
4057     ! enabled arm || check_as <<EOF || return 1
4058 .altmacro
4059 EOF
4060     enable gnu_as
4061     return 0
4062 }
4063
4064 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4065     nogas=:
4066     enabled_any arm aarch64 && nogas=die
4067     enabled_all ppc altivec && nogas=warn
4068     as_noop=-v
4069
4070     case $as_type in
4071         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4072         gcc)  gaspp_as_type=gas ;;
4073         *)    gaspp_as_type=$as_type ;;
4074     esac
4075
4076     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4077
4078     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4079         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4080
4081     if ! check_gas ; then
4082         as=${gas:=$as}
4083         check_gas || \
4084             $nogas "GNU assembler not found, install/update gas-preprocessor"
4085     fi
4086
4087     check_as <<EOF && enable as_func
4088 .func test
4089 .endfunc
4090 EOF
4091 fi
4092
4093 check_inline_asm inline_asm_labels '"1:\n"'
4094
4095 if enabled aarch64; then
4096     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4097     # internal assembler in clang 3.3 does not support this instruction
4098     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4099     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4100
4101     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4102
4103 elif enabled alpha; then
4104
4105     check_cflags -mieee
4106
4107 elif enabled arm; then
4108
4109     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4110     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4111     enabled thumb && check_cflags -mthumb || check_cflags -marm
4112
4113     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4114         enable vfp_args
4115     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4116         enable vfp_args
4117     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4118         case "${cross_prefix:-$cc}" in
4119             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4120             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4121 __asm__ (".eabi_attribute 28, 1");
4122 int main(void) { return 0; }
4123 EOF
4124         esac
4125         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4126     fi
4127
4128     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4129     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4130     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4131     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4132     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4133     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4134
4135     [ $target_os = linux ] || [ $target_os = android ] ||
4136         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4137             $ARCH_EXT_LIST_ARM
4138
4139     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4140
4141     check_as <<EOF && enable as_dn_directive
4142 ra .dn d0.i16
4143 .unreq ra
4144 EOF
4145
4146     # llvm's integrated assembler supports .object_arch from llvm 3.5
4147     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4148 .object_arch armv4
4149 EOF
4150
4151     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4152
4153 elif enabled mips; then
4154
4155     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4156
4157     # make sure that only an instruction set is enabled
4158     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4159
4160     if enabled mips64; then
4161         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4162             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4163                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4164     else
4165         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4166             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4167                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4168     fi
4169
4170 elif enabled parisc; then
4171
4172     if enabled gcc; then
4173         case $($cc -dumpversion) in
4174             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4175         esac
4176     fi
4177
4178 elif enabled ppc; then
4179
4180     enable local_aligned_8 local_aligned_16
4181
4182     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4183     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4184     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4185     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4186
4187     # AltiVec flags: The FSF version of GCC differs from the Apple version
4188     if enabled altivec; then
4189         check_cflags -maltivec -mabi=altivec &&
4190         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4191         check_cflags -faltivec
4192
4193         # check if our compiler supports Motorola AltiVec C API
4194         check_cc <<EOF || disable altivec
4195 $inc_altivec_h
4196 int main(void) {
4197     vector signed int v1 = (vector signed int) { 0 };
4198     vector signed int v2 = (vector signed int) { 1 };
4199     v1 = vec_add(v1, v2);
4200     return 0;
4201 }
4202 EOF
4203
4204         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4205     fi
4206
4207     if enabled vsx; then
4208         check_cflags -mvsx &&
4209         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4210     fi
4211
4212     if enabled power8; then
4213         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4214     fi
4215
4216 elif enabled x86; then
4217
4218     check_builtin rdtsc    intrin.h   "__rdtsc()"
4219     check_builtin mm_empty mmintrin.h "_mm_empty()"
4220
4221     enable local_aligned_8 local_aligned_16
4222
4223     # check whether EBP is available on x86
4224     # As 'i' is stored on the stack, this program will crash
4225     # if the base pointer is used to access it because the
4226     # base pointer is cleared in the inline assembly code.
4227     check_exec_crash <<EOF && enable ebp_available
4228 volatile int i=0;
4229 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4230 return i;
4231 EOF
4232
4233     # check whether EBX is available on x86
4234     check_inline_asm ebx_available '""::"b"(0)' &&
4235         check_inline_asm ebx_available '"":::"%ebx"'
4236
4237     # check whether xmm clobbers are supported
4238     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4239
4240     # check whether binutils is new enough to compile SSSE3/MMXEXT
4241     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4242     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4243
4244     if ! disabled_any asm mmx yasm; then
4245         if check_cmd $yasmexe --version; then
4246             enabled x86_64 && yasm_extra="-m amd64"
4247             yasm_debug="-g dwarf2"
4248         elif check_cmd nasm -v; then
4249             yasmexe=nasm
4250             yasm_debug="-g -F dwarf"
4251             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4252         fi
4253
4254         YASMFLAGS="-f $objformat $yasm_extra"
4255         enabled pic               && append YASMFLAGS "-DPIC"
4256         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4257         case "$objformat" in
4258             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4259         esac
4260
4261         check_yasm "movbe ecx, [5]" && enable yasm ||
4262             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4263         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4264         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4265         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4266         check_yasm "CPU amdnop" || disable cpunop
4267     fi
4268
4269     case "$cpu" in
4270         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4271             disable fast_clz
4272         ;;
4273     esac
4274
4275 fi
4276
4277 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4278
4279 check_ldflags -Wl,--as-needed
4280
4281 if check_func dlopen; then
4282     ldl=
4283 elif check_func dlopen -ldl; then
4284     ldl=-ldl
4285 fi
4286
4287 if ! disabled network; then
4288     check_func getaddrinfo $network_extralibs
4289     check_func inet_aton $network_extralibs
4290
4291     check_type netdb.h "struct addrinfo"
4292     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4293     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4294     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4295     check_type poll.h "struct pollfd"
4296     check_type netinet/sctp.h "struct sctp_event_subscribe"
4297     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4298     check_type netinet/in.h "struct sockaddr_in6"
4299     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4300     check_type "sys/types.h sys/socket.h" socklen_t
4301
4302     # Prefer arpa/inet.h over winsock2
4303     if check_header arpa/inet.h ; then
4304         check_func closesocket
4305     elif check_header winsock2.h ; then
4306         check_func_headers winsock2.h closesocket -lws2 &&
4307             network_extralibs="-lws2" ||
4308         { check_func_headers winsock2.h closesocket -lws2_32 &&
4309             network_extralibs="-lws2_32"; } || disable winsock2_h network
4310         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4311
4312         check_type ws2tcpip.h socklen_t
4313         check_type ws2tcpip.h "struct addrinfo"
4314         check_type ws2tcpip.h "struct group_source_req"
4315         check_type ws2tcpip.h "struct ip_mreq_source"
4316         check_type ws2tcpip.h "struct ipv6_mreq"
4317         check_type winsock2.h "struct pollfd"
4318         check_struct winsock2.h "struct sockaddr" sa_len
4319         check_type ws2tcpip.h "struct sockaddr_in6"
4320         check_type ws2tcpip.h "struct sockaddr_storage"
4321     else
4322         disable network
4323     fi
4324 fi
4325
4326 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4327 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4328 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4329 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4330
4331 case "$custom_allocator" in
4332     jemalloc)
4333         # jemalloc by default does not use a prefix
4334         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4335     ;;
4336     tcmalloc)
4337         require_pkg_config libtcmalloc gperftools/tcmalloc.h tc_malloc
4338         malloc_prefix=tc_
4339     ;;
4340 esac
4341
4342 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4343 check_func  ${malloc_prefix}memalign            && enable memalign
4344 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4345
4346 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4347     check_func_headers time.h clock_gettime || { check_func_headers time.h clock_gettime -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
4348
4349 check_func  fcntl
4350 check_func  fork
4351 check_func  gethrtime
4352 check_func  getopt
4353 check_func  getrusage
4354 check_func  gettimeofday
4355 check_func  gmtime_r
4356 check_func  isatty
4357 check_func  localtime_r
4358 check_func  mach_absolute_time
4359 check_func  mkstemp
4360 check_func  mmap
4361 check_func  mprotect
4362 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4363 check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt; }
4364 check_func  sched_getaffinity
4365 check_func  setrlimit
4366 check_func  strerror_r
4367 check_func  sysconf
4368 check_func  sysctl
4369 check_func  usleep
4370
4371 check_func_headers io.h setmode
4372 check_func_headers stdlib.h getenv
4373
4374 check_func_headers windows.h CoTaskMemFree -lole32
4375 check_func_headers windows.h GetProcessAffinityMask
4376 check_func_headers windows.h GetProcessTimes
4377 check_func_headers windows.h GetSystemTimeAsFileTime
4378 check_func_headers windows.h LoadLibrary
4379 check_func_headers windows.h MapViewOfFile
4380 check_func_headers windows.h SetConsoleTextAttribute
4381 check_func_headers windows.h Sleep
4382 check_func_headers windows.h VirtualAlloc
4383 check_struct windows.h "CONDITION_VARIABLE" Ptr
4384
4385 check_header direct.h
4386 check_header dlfcn.h
4387 check_header d3d11.h
4388 check_header dxva.h
4389 check_header dxva2api.h
4390 check_header io.h
4391 check_header mach/mach_time.h
4392 check_header malloc.h
4393 check_header poll.h
4394 check_header sys/mman.h
4395 check_header sys/param.h
4396 check_header sys/resource.h
4397 check_header sys/select.h
4398 check_header sys/time.h
4399 check_header sys/un.h
4400 check_header unistd.h
4401 check_header valgrind/valgrind.h
4402 check_header vdpau/vdpau.h
4403 check_header vdpau/vdpau_x11.h
4404 check_header VideoDecodeAcceleration/VDADecoder.h
4405 check_header windows.h
4406 check_header X11/extensions/XvMClib.h
4407
4408 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
4409 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
4410 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
4411
4412 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4413
4414 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4415 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4416 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4417
4418 if ! disabled w32threads && ! enabled pthreads; then
4419     check_func_headers "windows.h process.h" _beginthreadex &&
4420         enable w32threads || disable w32threads
4421 fi
4422
4423 # check for some common methods of building with pthread support
4424 # do this before the optional library checks as some of them require pthreads
4425 if ! disabled pthreads && ! enabled w32threads; then
4426     enable pthreads
4427     if check_func pthread_join -pthread; then
4428         add_cflags -pthread
4429         add_extralibs -pthread
4430     elif check_func pthread_join -pthreads; then
4431         add_cflags -pthreads
4432         add_extralibs -pthreads
4433     elif check_func pthread_join -lpthreadGC2; then
4434         add_extralibs -lpthreadGC2
4435     elif check_lib pthread.h pthread_join -lpthread; then
4436         :
4437     elif ! check_func pthread_join; then
4438         disable pthreads
4439     fi
4440 fi
4441
4442 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
4443 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4444
4445 check_lib math.h sin -lm && LIBM="-lm"
4446 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4447
4448 atan2f_args=2
4449 ldexpf_args=2
4450 powf_args=2
4451
4452 for func in $MATH_FUNCS; do
4453     eval check_mathfunc $func \${${func}_args:-1}
4454 done
4455
4456 # these are off by default, so fail if requested and not available
4457 enabled avisynth          && { check_lib2 "avisynth/avisynth_c.h windows.h" LoadLibrary ||
4458                                check_lib2 "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl   ||
4459                                die "ERROR: LoadLibrary/dlopen not found, or avisynth header not found"; }
4460 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4461 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4462 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4463 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4464 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4465 enabled libfdk_aac        && require_pkg_config fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4466 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4467 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4468 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4469                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4470                                done || die "ERROR: libgsm not found"; }
4471 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4472 enabled libkvazaar        && require_pkg_config "kvazaar >= 0.7.1" kvazaar.h kvz_api_get
4473 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
4474 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4475 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4476 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4477 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4478 enabled libopenh264       && require_pkg_config openh264 wels/codec_api.h WelsGetCodecVersion
4479 enabled libopenjpeg       && { { check_header openjpeg.h && check_lib2 openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC; } ||
4480                                { require_pkg_config libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; } }
4481 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4482 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4483 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4484 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4485 enabled libsnappy         && require snappy snappy-c.h snappy_compress -lsnappy
4486 enabled libspeex          && require_pkg_config speex speex/speex.h speex_decoder_init -lspeex
4487 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4488 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4489 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4490 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4491 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4492 enabled libvpx            && require_pkg_config "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4493     enabled libvpx_vp8_decoder && {
4494         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4495             disable libvpx_vp8_decoder;
4496     }
4497     enabled libvpx_vp8_encoder && {
4498         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4499             disable libvpx_vp8_encoder;
4500     }
4501     enabled libvpx_vp9_decoder && {
4502         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4503             disable libvpx_vp9_decoder;
4504     }
4505     enabled libvpx_vp9_encoder && {
4506         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4507             disable libvpx_vp9_encoder;
4508     }
4509     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4510         die "libvpx enabled but no supported decoders found"
4511     fi
4512 }
4513 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4514 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4515 enabled libx264           && require_pkg_config x264 "stdint.h x264.h" x264_encoder_encode &&
4516                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4517                                die "ERROR: libx264 version must be >= 0.118."; } &&
4518                              { check_cpp_condition x264.h "X264_MPEG2" &&
4519                                enable libx262; }
4520 enabled libx265           && require_pkg_config x265 x265.h x265_api_get &&
4521                              { check_cpp_condition x265.h "X265_BUILD >= 57" ||
4522                                die "ERROR: libx265 version must be >= 57."; }
4523 enabled libxavs           && require libxavs xavs.h xavs_encoder_encode -lxavs
4524 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4525 enabled mmal              && { check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4526                                 { ! enabled cross_compile && {
4527                                     add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline ;
4528                                     add_extralibs -L/opt/vc/lib/ -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ;
4529                                     check_lib interface/mmal/mmal.h mmal_port_connect ; }
4530                                 check_lib interface/mmal/mmal.h mmal_port_connect ; } ||
4531                                die "ERROR: mmal not found"; }
4532 enabled openssl           && { check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4533                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4534                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4535                                die "ERROR: openssl not found"; }
4536
4537 if enabled gnutls; then
4538     { check_lib2 gmp.h mpz_export -lgmp && enable gmp; } ||
4539     { check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }
4540 fi
4541
4542 # libdc1394 check
4543 if enabled libdc1394; then
4544     { require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new &&
4545         enable libdc1394_2; } ||
4546     { check_lib libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394 &&
4547         enable libdc1394_1; } ||
4548     die "ERROR: No version of libdc1394 found "
4549 fi
4550
4551 if enabled nvenc; then
4552     check_header cuda.h || die "ERROR: cuda.h not found.";
4553     check_header nvEncodeAPI.h || die "ERROR: nvEncodeAPI.h not found.";
4554     check_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 5" ||
4555         die "ERROR: NVENC API version 4 or older is not supported";
4556 fi
4557
4558 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4559     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4560     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4561     enable sdl
4562 fi
4563
4564 pod2man --help     > /dev/null 2>&1 && enable pod2man   || disable pod2man
4565 texi2html -version > /dev/null 2>&1 && enable texi2html || disable texi2html
4566
4567 check_header linux/fb.h
4568 check_header linux/videodev2.h
4569 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4570
4571 check_header AVFoundation/AVFoundation.h &&
4572     check_objcflags -fobjc-arc &&
4573     add_extralibs -framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia ||
4574     disable AVFoundation_AVFoundation_h
4575
4576 check_header sys/videoio.h
4577
4578 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
4579 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4580 # w32api 3.12 had it defined wrong
4581 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4582
4583 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4584 { check_header dev/bktr/ioctl_meteor.h &&
4585   check_header dev/bktr/ioctl_bt848.h; } ||
4586 { check_header machine/ioctl_meteor.h &&
4587   check_header machine/ioctl_bt848.h; } ||
4588 { check_header dev/video/meteor/ioctl_meteor.h &&
4589   check_header dev/video/bktr/ioctl_bt848.h; } ||
4590 check_header dev/ic/bt8xx.h
4591
4592 check_header sndio.h
4593 check_header sys/soundcard.h
4594 check_header soundcard.h
4595
4596 enabled_any alsa_indev alsa_outdev &&
4597     check_lib2 alsa/asoundlib.h snd_pcm_htimestamp -lasound
4598
4599 enabled jack_indev && check_lib2 jack/jack.h jack_client_open -ljack &&
4600     check_func jack_port_get_latency_range -ljack
4601
4602 enabled_any sndio_indev sndio_outdev && check_lib2 sndio.h sio_open -lsndio
4603
4604 if enabled libcdio; then
4605     check_lib2 "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4606     check_lib2 "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4607     die "ERROR: No usable libcdio/cdparanoia found"
4608 fi
4609
4610 check_lib X11/Xlib.h XOpenDisplay -lX11 && enable xlib
4611
4612 if enabled libxcb || enabled x11grab && ! disabled libxcb; then
4613     check_pkg_config xcb-shape xcb/shape.h xcb_shape_rectangles || {
4614         enabled libxcb && die "ERROR: libxcb not found";
4615     } && disable x11grab && enable libxcb
4616
4617     disabled libxcb_shm ||
4618         check_pkg_config xcb-shm xcb/shm.h xcb_shm_attach || {
4619             enabled libxcb_shm && die "ERROR: libxcb_shm not found";
4620         } && check_header sys/shm.h && enable libxcb_shm
4621
4622     disabled libxcb_xfixes ||
4623         check_pkg_config xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image || {
4624             enabled libxcb_xfixes && die "ERROR: libxcb_xfixes not found";
4625         } && enable libxcb_xfixes
4626
4627     add_cflags "$xcb_event_cflags $xcb_shm_cflags $xcb_xfixes_cflags"
4628     add_extralibs "$xcb_event_libs $xcb_shm_libs $xcb_xfixes_libs"
4629 fi
4630
4631 if enabled x11grab; then
4632     enabled xlib || die "ERROR: Xlib not found"
4633     require Xext X11/extensions/XShm.h XShmCreateImage -lXext
4634     require Xfixes X11/extensions/Xfixes.h XFixesGetCursorImage -lXfixes
4635 fi
4636
4637 enabled vaapi && enabled xlib &&
4638     check_lib2 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 &&
4639     enable vaapi_x11
4640
4641 enabled vdpau &&
4642     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4643     disable vdpau
4644
4645 enabled vdpau && enabled xlib &&
4646     check_func_headers "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau &&
4647     prepend avconv_libs $($ldflags_filter "-lvdpau") &&
4648     enable vdpau_x11
4649
4650 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4651
4652 # add some useful compiler flags if supported
4653 check_cflags -Wdeclaration-after-statement
4654 check_cflags -Wall
4655 check_cflags -Wdisabled-optimization
4656 check_cflags -Wpointer-arith
4657 check_cflags -Wredundant-decls
4658 check_cflags -Wwrite-strings
4659 check_cflags -Wtype-limits
4660 check_cflags -Wundef
4661 check_cflags -Wmissing-prototypes
4662 check_cflags -Wstrict-prototypes
4663 enabled extra_warnings && check_cflags -Winline
4664 enabled extra_warnings && check_cflags -Wcast-qual
4665
4666 check_disable_warning(){
4667     warning_flag=-W${1#-Wno-}
4668     test_cflags $warning_flag && add_cflags $1
4669 }
4670
4671 check_disable_warning -Wno-parentheses
4672 check_disable_warning -Wno-switch
4673 check_disable_warning -Wno-format-zero-length
4674 check_disable_warning -Wno-pointer-sign
4675
4676 # add some linker flags
4677 check_ldflags -Wl,--warn-common
4678 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4679 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir
4680 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
4681
4682 # add some strip flags
4683 # -wN '..@*' is more selective than -x, but not available everywhere.
4684 check_stripflags -wN \'..@*\' || check_stripflags -x || strip='true'
4685
4686 enabled neon_clobber_test &&
4687     check_ldflags -Wl,--wrap,avcodec_open2              \
4688                   -Wl,--wrap,avcodec_decode_audio4      \
4689                   -Wl,--wrap,avcodec_decode_video2      \
4690                   -Wl,--wrap,avcodec_decode_subtitle2   \
4691                   -Wl,--wrap,avcodec_encode_audio2      \
4692                   -Wl,--wrap,avcodec_encode_video2      \
4693                   -Wl,--wrap,avcodec_encode_subtitle    \
4694                   -Wl,--wrap,avresample_convert ||
4695     disable neon_clobber_test
4696
4697 enabled xmm_clobber_test &&
4698     check_ldflags -Wl,--wrap,avcodec_open2              \
4699                   -Wl,--wrap,avcodec_decode_audio4      \
4700                   -Wl,--wrap,avcodec_decode_video2      \
4701                   -Wl,--wrap,avcodec_decode_subtitle2   \
4702                   -Wl,--wrap,avcodec_encode_audio2      \
4703                   -Wl,--wrap,avcodec_encode_video2      \
4704                   -Wl,--wrap,avcodec_encode_subtitle    \
4705                   -Wl,--wrap,avresample_convert         \
4706                   -Wl,--wrap,sws_scale ||
4707     disable xmm_clobber_test
4708
4709 echo "X { local: *; };" > $TMPV
4710 if test_ldflags -Wl,--version-script,$TMPV; then
4711     append SHFLAGS '-Wl,--version-script,\$(SUBDIR)lib\$(NAME).ver'
4712 elif test_ldflags -Wl,-M,$TMPV; then
4713     append SHFLAGS '-Wl,-M,\$(SUBDIR)lib\$(NAME).ver-sol2'
4714 fi
4715
4716 check_cc <<EOF && enable symver_asm_label
4717 void ff_foo(void) __asm__ ("av_foo@VERSION");
4718 void ff_foo(void) { ${inline_asm+__asm__($quotes);} }
4719 EOF
4720     check_cc <<EOF && enable symver_gnu_asm
4721 __asm__(".symver ff_foo,av_foo@VERSION");
4722 void ff_foo(void) {}
4723 EOF
4724
4725 if [ -z "$optflags" ]; then
4726     if enabled small; then
4727         optflags=$cflags_size
4728     elif enabled optimizations; then
4729         optflags=$cflags_speed
4730     else
4731         optflags=$cflags_noopt
4732     fi
4733 fi
4734
4735 check_optflags(){
4736     check_cflags "$@"
4737     enabled lto && check_ldflags "$@"
4738 }
4739
4740
4741 if enabled lto; then
4742     test "$cc_type" != "$ld_type" && die "LTO requires same compiler and linker"
4743     check_cflags  -flto
4744     check_ldflags -flto $cpuflags
4745 fi
4746
4747 check_optflags $optflags
4748 check_optflags -fno-math-errno
4749 check_optflags -fno-signed-zeros
4750
4751 if enabled icc; then
4752     # Just warnings, no remarks
4753     check_cflags -w1
4754     # -wd: Disable following warnings
4755     # 144, 167, 556: -Wno-pointer-sign
4756     # 1292: attribute "foo" ignored
4757     # 1419: external declaration in primary source file
4758     # 10006: ignoring unknown option -fno-signed-zeros
4759     # 10148: ignoring unknown option -Wno-parentheses
4760     # 10156: ignoring option '-W'; no argument required
4761     check_cflags -wd144,167,556,1292,1419,10006,10148,10156
4762     # 11030: Warning unknown option --as-needed
4763     # 10156: ignoring option '-export'; no argument required
4764     check_ldflags -wd10156,11030
4765     # icc 11.0 and 11.1 work with ebp_available, but don't pass the test
4766     enable ebp_available
4767     if enabled x86_32; then
4768         icc_version=$($cc -dumpversion)
4769         test ${icc_version%%.*} -ge 11 &&
4770             check_cflags -falign-stack=maintain-16-byte ||
4771             disable aligned_stack
4772     fi
4773 elif enabled ccc; then
4774     # disable some annoying warnings
4775     add_cflags -msg_disable bitnotint
4776     add_cflags -msg_disable mixfuncvoid
4777     add_cflags -msg_disable nonstandcast
4778     add_cflags -msg_disable unsupieee
4779 elif enabled gcc; then
4780     check_optflags -fno-tree-vectorize
4781     check_cflags -Werror=implicit-function-declaration
4782     check_cflags -Werror=missing-prototypes
4783     check_cflags -Werror=return-type
4784     check_cflags -Werror=declaration-after-statement
4785     check_cflags -Werror=vla
4786     check_cflags -Werror=format-security
4787     check_cflags -fdiagnostics-color=auto
4788     enabled extra_warnings || check_disable_warning -Wno-maybe-uninitialized
4789 elif enabled llvm_gcc; then
4790     check_cflags -mllvm -stack-alignment=16
4791 elif enabled clang; then
4792     check_cflags -mllvm -stack-alignment=16
4793     check_cflags -Qunused-arguments
4794     check_cflags -Werror=implicit-function-declaration
4795     check_cflags -Werror=missing-prototypes
4796     check_cflags -Werror=return-type
4797 elif enabled cparser; then
4798     add_cflags -Wno-missing-variable-declarations
4799     add_cflags -Wno-empty-statement
4800 elif enabled armcc; then
4801     add_cflags -W${armcc_opt},--diag_suppress=4343 # hardfp compat
4802     add_cflags -W${armcc_opt},--diag_suppress=3036 # using . as system include dir
4803     # 2523: use of inline assembly is deprecated
4804     add_cflags -W${armcc_opt},--diag_suppress=2523
4805     add_cflags -W${armcc_opt},--diag_suppress=1207
4806     add_cflags -W${armcc_opt},--diag_suppress=1293 # assignment in condition
4807     add_cflags -W${armcc_opt},--diag_suppress=3343 # hardfp compat
4808     add_cflags -W${armcc_opt},--diag_suppress=167  # pointer sign
4809     add_cflags -W${armcc_opt},--diag_suppress=513  # pointer sign
4810 elif enabled tms470; then
4811     add_cflags -pds=824 -pds=837
4812     disable inline_asm
4813 elif enabled pathscale; then
4814     add_cflags -fstrict-overflow -OPT:wrap_around_unsafe_opt=OFF
4815 elif enabled_any msvc icl; then
4816     enabled x86_32 && disable aligned_stack
4817     enabled_all x86_32 debug && add_cflags -Oy-
4818     enabled debug && add_ldflags -debug
4819     enable pragma_deprecated
4820     if enabled icl; then
4821         # -Qansi-alias is basically -fstrict-aliasing, but does not work
4822         # (correctly) on icl 13.x.
4823         check_cpp_condition "windows.h" "__ICL < 1300 || __ICL >= 1400" &&
4824             add_cflags -Qansi-alias
4825         # icl will pass the inline asm tests but inline asm is currently
4826         # not supported (build will fail)
4827         disable inline_asm
4828     fi
4829     # msvcrt10 x64 incorrectly enables log2, only msvcrt12 (MSVC 2013) onwards actually has log2.
4830     check_cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION >= 12" || disable log2
4831     # The CRT headers contain __declspec(restrict) in a few places, but if redefining
4832     # restrict, this might break. MSVC 2010 and 2012 fail with __declspec(__restrict)
4833     # (as it ends up if the restrict redefine is done before including stdlib.h), while