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[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-dxva2           enable DXVA2 code
137   --enable-vaapi           enable VAAPI code
138   --enable-vda             enable VDA code
139   --enable-vdpau           enable VDPAU code
140
141 Individual component options:
142   --disable-everything     disable all components listed below
143   --disable-encoder=NAME   disable encoder NAME
144   --enable-encoder=NAME    enable encoder NAME
145   --disable-encoders       disable all encoders
146   --disable-decoder=NAME   disable decoder NAME
147   --enable-decoder=NAME    enable decoder NAME
148   --disable-decoders       disable all decoders
149   --disable-hwaccel=NAME   disable hwaccel NAME
150   --enable-hwaccel=NAME    enable hwaccel NAME
151   --disable-hwaccels       disable all hwaccels
152   --disable-muxer=NAME     disable muxer NAME
153   --enable-muxer=NAME      enable muxer NAME
154   --disable-muxers         disable all muxers
155   --disable-demuxer=NAME   disable demuxer NAME
156   --enable-demuxer=NAME    enable demuxer NAME
157   --disable-demuxers       disable all demuxers
158   --enable-parser=NAME     enable parser NAME
159   --disable-parser=NAME    disable parser NAME
160   --disable-parsers        disable all parsers
161   --enable-bsf=NAME        enable bitstream filter NAME
162   --disable-bsf=NAME       disable bitstream filter NAME
163   --disable-bsfs           disable all bitstream filters
164   --enable-protocol=NAME   enable protocol NAME
165   --disable-protocol=NAME  disable protocol NAME
166   --disable-protocols      disable all protocols
167   --enable-indev=NAME      enable input device NAME
168   --disable-indev=NAME     disable input device NAME
169   --disable-indevs         disable input devices
170   --enable-outdev=NAME     enable output device NAME
171   --disable-outdev=NAME    disable output device NAME
172   --disable-outdevs        disable output devices
173   --disable-devices        disable all devices
174   --enable-filter=NAME     enable filter NAME
175   --disable-filter=NAME    disable filter NAME
176   --disable-filters        disable all filters
177
178 External library support:
179   --enable-avisynth        enable reading of AviSynth script files [no]
180   --enable-bzlib           enable bzlib [autodetect]
181   --enable-frei0r          enable frei0r video filtering
182   --enable-gnutls          enable gnutls [no]
183   --enable-libbs2b         enable bs2b DSP library [no]
184   --enable-libcdio         enable audio CD grabbing with libcdio
185   --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394
186                            and libraw1394 [no]
187   --enable-libfaac         enable AAC encoding via libfaac [no]
188   --enable-libfdk-aac      enable AAC de/encoding via libfdk-aac [no]
189   --enable-libfreetype     enable libfreetype [no]
190   --enable-libgsm          enable GSM de/encoding via libgsm [no]
191   --enable-libilbc         enable iLBC de/encoding via libilbc [no]
192   --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
193   --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
194   --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
195   --enable-libopencv       enable video filtering via libopencv [no]
196   --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]
197   --enable-libopus         enable Opus de/encoding via libopus [no]
198   --enable-libpulse        enable Pulseaudio input via libpulse [no]
199   --enable-librtmp         enable RTMP[E] support via librtmp [no]
200   --enable-libschroedinger enable Dirac de/encoding via libschroedinger [no]
201   --enable-libspeex        enable Speex de/encoding via libspeex [no]
202   --enable-libtheora       enable Theora encoding via libtheora [no]
203   --enable-libtwolame      enable MP2 encoding via libtwolame [no]
204   --enable-libvo-aacenc    enable AAC encoding via libvo-aacenc [no]
205   --enable-libvo-amrwbenc  enable AMR-WB encoding via libvo-amrwbenc [no]
206   --enable-libvorbis       enable Vorbis encoding via libvorbis [no]
207   --enable-libvpx          enable VP8 and VP9 de/encoding via libvpx [no]
208   --enable-libwavpack      enable wavpack encoding via libwavpack [no]
209   --enable-libwebp         enable WebP encoding via libwebp [no]
210   --enable-libx264         enable H.264 encoding via x264 [no]
211   --enable-libx265         enable HEVC encoding via x265 [no]
212   --enable-libxavs         enable AVS encoding via xavs [no]
213   --enable-libxcb          enable X11 grabbing using XCB [no]
214   --enable-libxcb-shm      enable X11 grabbing shm communication [auto]
215   --enable-libxcb-xfixes   enable X11 grabbing mouse rendering [auto]
216   --enable-libxvid         enable Xvid encoding via xvidcore,
217                            native MPEG-4/Xvid encoder exists [no]
218   --enable-openssl         enable openssl [no]
219   --enable-x11grab         enable X11 grabbing (legacy) [no]
220   --enable-zlib            enable zlib [autodetect]
221
222 Toolchain options:
223   --arch=ARCH              select architecture [$arch]
224   --cpu=CPU                select the minimum required CPU (affects
225                            instruction selection, may crash on older CPUs)
226   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
227   --enable-cross-compile   assume a cross-compiler is used
228   --sysroot=PATH           root of cross-build tree
229   --sysinclude=PATH        location of cross-build system headers
230   --target-os=OS           compiler targets OS [$target_os]
231   --target-exec=CMD        command to run executables on target
232   --target-path=DIR        path to view of build directory on target
233   --target-samples=DIR     path to samples directory on target
234   --toolchain=NAME         set tool defaults according to NAME
235   --nm=NM                  use nm tool
236   --ar=AR                  use archive tool AR [$ar_default]
237   --as=AS                  use assembler AS [$as_default]
238   --cc=CC                  use C compiler CC [$cc_default]
239   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
240   --ld=LD                  use linker LD
241   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
242   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
243   --host-cc=HOSTCC         use host C compiler HOSTCC
244   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
245   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
246   --host-ld=HOSTLD         use host linker HOSTLD
247   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
248   --host-libs=HLIBS        use libs HLIBS when linking for host
249   --host-os=OS             compiler host OS [$target_os]
250   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
251   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
252   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
253   --extra-libs=ELIBS       add ELIBS [$ELIBS]
254   --extra-version=STRING   version string suffix []
255   --optflags=OPTFLAGS      override optimization-related compiler flags
256   --build-suffix=SUFFIX    library name suffix []
257   --enable-pic             build position-independent code
258   --enable-thumb           compile for Thumb instruction set
259   --enable-lto             use link-time optimization
260
261 Advanced options (experts only):
262   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
263   --disable-symver         disable symbol versioning
264   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
265   --disable-safe-bitstream-reader
266                            disable buffer boundary checking in bitreaders
267                            (faster, but may crash)
268   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
269   --enable-sram            allow use of on-chip SRAM
270
271 Optimization options (experts only):
272   --disable-asm            disable all assembly optimizations
273   --disable-altivec        disable AltiVec optimizations
274   --disable-amd3dnow       disable 3DNow! optimizations
275   --disable-amd3dnowext    disable 3DNow! extended optimizations
276   --disable-mmx            disable MMX optimizations
277   --disable-mmxext         disable MMXEXT optimizations
278   --disable-sse            disable SSE optimizations
279   --disable-sse2           disable SSE2 optimizations
280   --disable-sse3           disable SSE3 optimizations
281   --disable-ssse3          disable SSSE3 optimizations
282   --disable-sse4           disable SSE4 optimizations
283   --disable-sse42          disable SSE4.2 optimizations
284   --disable-avx            disable AVX optimizations
285   --disable-xop            disable XOP optimizations
286   --disable-fma3           disable FMA3 optimizations
287   --disable-fma4           disable FMA4 optimizations
288   --disable-avx2           disable AVX2 optimizations
289   --disable-armv5te        disable armv5te optimizations
290   --disable-armv6          disable armv6 optimizations
291   --disable-armv6t2        disable armv6t2 optimizations
292   --disable-vfp            disable VFP optimizations
293   --disable-neon           disable NEON optimizations
294   --disable-inline-asm     disable use of inline assembly
295   --disable-yasm           disable use of nasm/yasm assembly
296
297 Developer options (useful when working on Libav itself):
298   --disable-debug          disable debugging symbols
299   --enable-debug=LEVEL     set the debug level [$debuglevel]
300   --disable-optimizations  disable compiler optimizations
301   --enable-extra-warnings  enable more compiler warnings
302   --samples=PATH           location of test samples for FATE, if not set use
303                            \$LIBAV_SAMPLES at make invocation time.
304   --enable-neon-clobber-test check NEON registers for clobbering (should be
305                            used only for debugging purposes)
306   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
307                            should be used only for debugging purposes)
308   --enable-random          randomly enable/disable components
309   --disable-random
310   --enable-random=LIST     randomly enable/disable specific components or
311   --disable-random=LIST    component groups. LIST is a comma-separated list
312                            of NAME[:PROB] entries where NAME is a component
313                            (group) and PROB the probability associated with
314                            NAME (default 0.5).
315   --random-seed=VALUE      seed value for --enable/disable-random
316
317 NOTE: Object files are built at the place where configure is launched.
318 EOF
319   exit 0
320 }
321
322 quotes='""'
323
324 log(){
325     echo "$@" >> $logfile
326 }
327
328 log_file(){
329     log BEGIN $1
330     pr -n -t $1 >> $logfile
331     log END $1
332 }
333
334 echolog(){
335     log "$@"
336     echo "$@"
337 }
338
339 warn(){
340     log "WARNING: $*"
341     WARNINGS="${WARNINGS}WARNING: $*\n"
342 }
343
344 die(){
345     echolog "$@"
346     cat <<EOF
347
348 If you think configure made a mistake, make sure you are using the latest
349 version from Git.  If the latest version fails, report the problem to the
350 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
351 EOF
352     if disabled logging; then
353         cat <<EOF
354 Rerun configure with logging enabled (do not use --disable-logging), and
355 include the log this produces with your report.
356 EOF
357     else
358         cat <<EOF
359 Include the log file "$logfile" produced by configure as this will help
360 solving the problem.
361 EOF
362     fi
363     exit 1
364 }
365
366 # Avoid locale weirdness, besides we really just want to translate ASCII.
367 toupper(){
368     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
369 }
370
371 tolower(){
372     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
373 }
374
375 c_escape(){
376     echo "$*" | sed 's/["\\]/\\\0/g'
377 }
378
379 sh_quote(){
380     v=$(echo "$1" | sed "s/'/'\\\\''/g")
381     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
382     echo "$v"
383 }
384
385 cleanws(){
386     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
387 }
388
389 filter(){
390     pat=$1
391     shift
392     for v; do
393         eval "case $v in $pat) echo $v ;; esac"
394     done
395 }
396
397 filter_out(){
398     pat=$1
399     shift
400     for v; do
401         eval "case $v in $pat) ;; *) echo $v ;; esac"
402     done
403 }
404
405 map(){
406     m=$1
407     shift
408     for v; do eval $m; done
409 }
410
411 add_suffix(){
412     suffix=$1
413     shift
414     for v; do echo ${v}${suffix}; done
415 }
416
417 set_all(){
418     value=$1
419     shift
420     for var in $*; do
421         eval $var=$value
422     done
423 }
424
425 set_weak(){
426     value=$1
427     shift
428     for var; do
429         eval : \${$var:=$value}
430     done
431 }
432
433 sanitize_var_name(){
434     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
435 }
436
437 set_safe(){
438     var=$1
439     shift
440     eval $(sanitize_var_name "$var")='$*'
441 }
442
443 get_safe(){
444     eval echo \$$(sanitize_var_name "$1")
445 }
446
447 pushvar(){
448     for pvar in $*; do
449         eval level=\${${pvar}_level:=0}
450         eval ${pvar}_${level}="\$$pvar"
451         eval ${pvar}_level=$(($level+1))
452     done
453 }
454
455 popvar(){
456     for pvar in $*; do
457         eval level=\${${pvar}_level:-0}
458         test $level = 0 && continue
459         eval level=$(($level-1))
460         eval $pvar="\${${pvar}_${level}}"
461         eval ${pvar}_level=$level
462         eval unset ${pvar}_${level}
463     done
464 }
465
466 enable(){
467     set_all yes $*
468 }
469
470 disable(){
471     set_all no $*
472 }
473
474 enable_weak(){
475     set_weak yes $*
476 }
477
478 disable_weak(){
479     set_weak no $*
480 }
481
482 enable_safe(){
483     for var; do
484         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
485     done
486 }
487
488 disable_safe(){
489     for var; do
490         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
491     done
492 }
493
494 do_enable_deep(){
495     for var; do
496         enabled $var && continue
497         eval sel="\$${var}_select"
498         eval sgs="\$${var}_suggest"
499         pushvar var sgs
500         enable_deep $sel
501         popvar sgs
502         enable_deep_weak $sgs
503         popvar var
504     done
505 }
506
507 enable_deep(){
508     do_enable_deep $*
509     enable $*
510 }
511
512 enable_deep_weak(){
513     for var; do
514         disabled $var && continue
515         pushvar var
516         do_enable_deep $var
517         popvar var
518         enable_weak $var
519     done
520 }
521
522 enabled(){
523     test "${1#!}" = "$1" && op== || op=!=
524     eval test "x\$${1#!}" $op "xyes"
525 }
526
527 disabled(){
528     test "${1#!}" = "$1" && op== || op=!=
529     eval test "x\$${1#!}" $op "xno"
530 }
531
532 enabled_all(){
533     for opt; do
534         enabled $opt || return 1
535     done
536 }
537
538 disabled_all(){
539     for opt; do
540         disabled $opt || return 1
541     done
542 }
543
544 enabled_any(){
545     for opt; do
546         enabled $opt && return 0
547     done
548 }
549
550 disabled_any(){
551     for opt; do
552         disabled $opt && return 0
553     done
554     return 1
555 }
556
557 set_default(){
558     for opt; do
559         eval : \${$opt:=\$${opt}_default}
560     done
561 }
562
563 is_in(){
564     value=$1
565     shift
566     for var in $*; do
567         [ $var = $value ] && return 0
568     done
569     return 1
570 }
571
572 do_check_deps(){
573     for cfg; do
574         cfg="${cfg#!}"
575         enabled ${cfg}_checking && die "Circular dependency for $cfg."
576         disabled ${cfg}_checking && continue
577         enable ${cfg}_checking
578         append allopts $cfg
579
580         eval dep_all="\$${cfg}_deps"
581         eval dep_any="\$${cfg}_deps_any"
582         eval dep_sel="\$${cfg}_select"
583         eval dep_sgs="\$${cfg}_suggest"
584         eval dep_ifa="\$${cfg}_if"
585         eval dep_ifn="\$${cfg}_if_any"
586
587         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
588         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
589         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
590
591         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
592         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
593         enabled_all  $dep_all || disable $cfg
594         enabled_any  $dep_any || disable $cfg
595         disabled_any $dep_sel && disable $cfg
596
597         if enabled $cfg; then
598             enable_deep $dep_sel
599             enable_deep_weak $dep_sgs
600         fi
601
602         disable ${cfg}_checking
603     done
604 }
605
606 check_deps(){
607     unset allopts
608
609     do_check_deps "$@"
610
611     for cfg in $allopts; do
612         enabled $cfg || continue
613         eval dep_extralibs="\$${cfg}_extralibs"
614         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
615     done
616 }
617
618 print_config(){
619     pfx=$1
620     files=$2
621     shift 2
622     map 'eval echo "$v \${$v:-no}"' "$@" |
623     awk "BEGIN { split(\"$files\", files) }
624         {
625             c = \"$pfx\" toupper(\$1);
626             v = \$2;
627             sub(/yes/, 1, v);
628             sub(/no/,  0, v);
629             for (f in files) {
630                 file = files[f];
631                 if (file ~ /\\.h\$/) {
632                     printf(\"#define %s %d\\n\", c, v) >>file;
633                 } else if (file ~ /\\.asm\$/) {
634                     printf(\"%%define %s %d\\n\", c, v) >>file;
635                 } else if (file ~ /\\.mak\$/) {
636                     n = -v ? \"\" : \"!\";
637                     printf(\"%s%s=yes\\n\", n, c) >>file;
638                 }
639             }
640         }"
641 }
642
643 print_enabled(){
644     suf=$1
645     shift
646     for v; do
647         enabled $v && printf "%s\n" ${v%$suf};
648     done
649 }
650
651 append(){
652     var=$1
653     shift
654     eval "$var=\"\$$var $*\""
655 }
656
657 prepend(){
658     var=$1
659     shift
660     eval "$var=\"$* \$$var\""
661 }
662
663 unique(){
664     var=$1
665     uniq_list=""
666     for tok in $(eval echo \$$var); do
667         uniq_list="$(filter_out $tok $uniq_list) $tok"
668     done
669     eval "$var=\"${uniq_list}\""
670 }
671
672 add_cppflags(){
673     append CPPFLAGS "$@"
674 }
675
676 add_cflags(){
677     append CFLAGS $($cflags_filter "$@")
678 }
679
680 add_asflags(){
681     append ASFLAGS $($asflags_filter "$@")
682 }
683
684 add_ldflags(){
685     append LDFLAGS $($ldflags_filter "$@")
686 }
687
688 add_ldexeflags(){
689     append LDEXEFLAGS $($ldflags_filter "$@")
690 }
691
692 add_stripflags(){
693     append STRIPFLAGS "$@"
694 }
695
696 add_extralibs(){
697     prepend extralibs $($ldflags_filter "$@")
698 }
699
700 add_host_cppflags(){
701     append host_cppflags "$@"
702 }
703
704 add_host_cflags(){
705     append host_cflags $($host_cflags_filter "$@")
706 }
707
708 add_host_ldflags(){
709     append host_ldflags $($host_ldflags_filter "$@")
710 }
711
712 add_compat(){
713     append compat_objs $1
714     shift
715     map 'add_cppflags -D$v' "$@"
716 }
717
718 check_cmd(){
719     log "$@"
720     "$@" >> $logfile 2>&1
721 }
722
723 cc_o(){
724     eval printf '%s\\n' $CC_O
725 }
726
727 cc_e(){
728     eval printf '%s\\n' $CC_E
729 }
730
731 check_cc(){
732     log check_cc "$@"
733     cat > $TMPC
734     log_file $TMPC
735     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
736 }
737
738 check_cpp(){
739     log check_cpp "$@"
740     cat > $TMPC
741     log_file $TMPC
742     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
743 }
744
745 as_o(){
746     eval printf '%s\\n' $AS_O
747 }
748
749 check_as(){
750     log check_as "$@"
751     cat > $TMPS
752     log_file $TMPS
753     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
754 }
755
756 check_inline_asm(){
757     log check_inline_asm "$@"
758     name="$1"
759     code="$2"
760     shift 2
761     disable $name
762     check_cc "$@" <<EOF && enable $name
763 void foo(void){ __asm__ volatile($code); }
764 EOF
765 }
766
767 check_insn(){
768     log check_insn "$@"
769     check_inline_asm ${1}_inline "\"$2\""
770     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
771 }
772
773 check_yasm(){
774     log check_yasm "$@"
775     echo "$1" > $TMPS
776     log_file $TMPS
777     shift 1
778     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
779 }
780
781 ld_o(){
782     eval printf '%s\\n' $LD_O
783 }
784
785 check_ld(){
786     log check_ld "$@"
787     flags=$(filter_out '-l*' "$@")
788     libs=$(filter '-l*' "$@")
789     check_cc $($cflags_filter $flags) || return
790     flags=$($ldflags_filter $flags)
791     libs=$($ldflags_filter $libs)
792     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
793 }
794
795 print_include(){
796     hdr=$1
797     test "${hdr%.h}" = "${hdr}" &&
798         echo "#include $hdr"    ||
799         echo "#include <$hdr>"
800 }
801
802 check_code(){
803     log check_code "$@"
804     check=$1
805     headers=$2
806     code=$3
807     shift 3
808     {
809         for hdr in $headers; do
810             print_include $hdr
811         done
812         echo "int main(void) { $code; return 0; }"
813     } | check_$check "$@"
814 }
815
816 check_cppflags(){
817     log check_cppflags "$@"
818     check_cc "$@" <<EOF && append CPPFLAGS "$@"
819 int x;
820 EOF
821 }
822
823 test_cflags(){
824     log test_cflags "$@"
825     set -- $($cflags_filter "$@")
826     check_cc "$@" <<EOF
827 int x;
828 EOF
829 }
830
831 check_cflags(){
832     log check_cflags "$@"
833     test_cflags "$@" && add_cflags "$@"
834 }
835
836 test_ldflags(){
837     log test_ldflags "$@"
838     check_ld "$@" <<EOF
839 int main(void){ return 0; }
840 EOF
841 }
842
843 check_ldflags(){
844     log check_ldflags "$@"
845     test_ldflags "$@" && add_ldflags "$@"
846 }
847
848 test_stripflags(){
849     log test_stripflags "$@"
850     # call check_cc to get a fresh TMPO
851     check_cc <<EOF
852 int main(void) { return 0; }
853 EOF
854     check_cmd $strip $STRIPFLAGS "$@" $TMPO
855 }
856
857 check_stripflags(){
858     log check_stripflags "$@"
859     test_stripflags "$@" && add_stripflags "$@"
860 }
861
862 check_header(){
863     log check_header "$@"
864     header=$1
865     shift
866     disable_safe $header
867     check_cpp "$@" <<EOF && enable_safe $header
868 #include <$header>
869 int x;
870 EOF
871 }
872
873 check_func(){
874     log check_func "$@"
875     func=$1
876     shift
877     disable $func
878     check_ld "$@" <<EOF && enable $func
879 extern int $func();
880 int main(void){ $func(); }
881 EOF
882 }
883
884 check_mathfunc(){
885     log check_mathfunc "$@"
886     func=$1
887     narg=$2
888     shift 2
889     test $narg = 2 && args="f, g" || args="f"
890     disable $func
891     check_ld "$@" <<EOF && enable $func
892 #include <math.h>
893 float foo(float f, float g) { return $func($args); }
894 int main(void){ return 0; }
895 EOF
896 }
897
898 check_func_headers(){
899     log check_func_headers "$@"
900     headers=$1
901     funcs=$2
902     shift 2
903     {
904         for hdr in $headers; do
905             print_include $hdr
906         done
907         for func in $funcs; do
908             echo "long check_$func(void) { return (long) $func; }"
909         done
910         echo "int main(void) { return 0; }"
911     } | check_ld "$@" && enable $funcs && enable_safe $headers
912 }
913
914 check_cpp_condition(){
915     log check_cpp_condition "$@"
916     header=$1
917     condition=$2
918     shift 2
919     check_cpp "$@" <<EOF
920 #include <$header>
921 #if !($condition)
922 #error "unsatisfied condition: $condition"
923 #endif
924 EOF
925 }
926
927 check_lib(){
928     log check_lib "$@"
929     header="$1"
930     func="$2"
931     shift 2
932     check_header $header && check_func $func "$@" && add_extralibs "$@"
933 }
934
935 check_lib2(){
936     log check_lib2 "$@"
937     headers="$1"
938     funcs="$2"
939     shift 2
940     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
941 }
942
943 check_pkg_config(){
944     log check_pkg_config "$@"
945     pkg="$1"
946     headers="$2"
947     funcs="$3"
948     shift 3
949     check_cmd $pkg_config --exists --print-errors $pkg || return
950     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
951     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
952     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
953         set_safe ${pkg}_cflags $pkg_cflags   &&
954         set_safe ${pkg}_libs   $pkg_libs
955 }
956
957 check_exec(){
958     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
959 }
960
961 check_exec_crash(){
962     code=$(cat)
963
964     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
965     # are safe but may not be available everywhere.  Thus we use
966     # raise(SIGTERM) instead.  The check is run in a subshell so we
967     # can redirect the "Terminated" message from the shell.  SIGBUS
968     # is not defined by standard C so it is used conditionally.
969
970     (check_exec "$@") >> $logfile 2>&1 <<EOF
971 #include <signal.h>
972 static void sighandler(int sig){
973     raise(SIGTERM);
974 }
975 int foo(void){
976     $code
977 }
978 int (*func_ptr)(void) = foo;
979 int main(void){
980     signal(SIGILL, sighandler);
981     signal(SIGFPE, sighandler);
982     signal(SIGSEGV, sighandler);
983 #ifdef SIGBUS
984     signal(SIGBUS, sighandler);
985 #endif
986     return func_ptr();
987 }
988 EOF
989 }
990
991 check_type(){
992     log check_type "$@"
993     headers=$1
994     type=$2
995     shift 2
996     disable_safe "$type"
997     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
998 }
999
1000 check_struct(){
1001     log check_struct "$@"
1002     headers=$1
1003     struct=$2
1004     member=$3
1005     shift 3
1006     disable_safe "${struct}_${member}"
1007     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1008         enable_safe "${struct}_${member}"
1009 }
1010
1011 check_builtin(){
1012     log check_builtin "$@"
1013     name=$1
1014     headers=$2
1015     builtin=$3
1016     shift 3
1017     disable "$name"
1018     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1019 }
1020
1021 check_compile_assert(){
1022     log check_compile_assert "$@"
1023     name=$1
1024     headers=$2
1025     condition=$3
1026     shift 3
1027     disable "$name"
1028     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1029 }
1030
1031 require(){
1032     name="$1"
1033     header="$2"
1034     func="$3"
1035     shift 3
1036     check_lib $header $func "$@" || die "ERROR: $name not found"
1037 }
1038
1039 require2(){
1040     name="$1"
1041     headers="$2"
1042     func="$3"
1043     shift 3
1044     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1045 }
1046
1047 require_pkg_config(){
1048     pkg="$1"
1049     check_pkg_config "$@" || die "ERROR: $pkg not found"
1050     add_cflags    $(get_safe ${pkg}_cflags)
1051     add_extralibs $(get_safe ${pkg}_libs)
1052 }
1053
1054 hostcc_e(){
1055     eval printf '%s\\n' $HOSTCC_E
1056 }
1057
1058 hostcc_o(){
1059     eval printf '%s\\n' $HOSTCC_O
1060 }
1061
1062 check_host_cc(){
1063     log check_host_cc "$@"
1064     cat > $TMPC
1065     log_file $TMPC
1066     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1067 }
1068
1069 check_host_cpp(){
1070     log check_host_cpp "$@"
1071     cat > $TMPC
1072     log_file $TMPC
1073     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1074 }
1075
1076 check_host_cppflags(){
1077     log check_host_cppflags "$@"
1078     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1079 int x;
1080 EOF
1081 }
1082
1083 check_host_cflags(){
1084     log check_host_cflags "$@"
1085     set -- $($host_cflags_filter "$@")
1086     check_host_cc "$@" <<EOF && append host_cflags "$@"
1087 int x;
1088 EOF
1089 }
1090
1091 check_host_cpp_condition(){
1092     log check_host_cpp_condition "$@"
1093     header=$1
1094     condition=$2
1095     shift 2
1096     check_host_cpp "$@" <<EOF
1097 #include <$header>
1098 #if !($condition)
1099 #error "unsatisfied condition: $condition"
1100 #endif
1101 EOF
1102 }
1103
1104 apply(){
1105     file=$1
1106     shift
1107     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1108 }
1109
1110 cp_if_changed(){
1111     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1112     mkdir -p "$(dirname $2)"
1113     $cp_f "$1" "$2"
1114 }
1115
1116 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1117 # system-dependent things.
1118
1119 COMPONENT_LIST="
1120     bsfs
1121     decoders
1122     demuxers
1123     encoders
1124     filters
1125     hwaccels
1126     indevs
1127     muxers
1128     outdevs
1129     parsers
1130     protocols
1131 "
1132
1133 EXAMPLE_LIST="
1134     avcodec_example
1135     filter_audio_example
1136     metadata_example
1137     output_example
1138     transcode_aac_example
1139 "
1140
1141 EXTERNAL_LIBRARY_LIST="
1142     avisynth
1143     bzlib
1144     frei0r
1145     gnutls
1146     libbs2b
1147     libcdio
1148     libdc1394
1149     libfaac
1150     libfdk_aac
1151     libfontconfig
1152     libfreetype
1153     libgsm
1154     libilbc
1155     libmp3lame
1156     libopencore_amrnb
1157     libopencore_amrwb
1158     libopencv
1159     libopenjpeg
1160     libopus
1161     libpulse
1162     librtmp
1163     libschroedinger
1164     libspeex
1165     libtheora
1166     libtwolame
1167     libvo_aacenc
1168     libvo_amrwbenc
1169     libvorbis
1170     libvpx
1171     libwavpack
1172     libwebp
1173     libx264
1174     libx265
1175     libxavs
1176     libxcb
1177     libxcb_shm
1178     libxcb_xfixes
1179     libxvid
1180     openssl
1181     x11grab
1182     zlib
1183 "
1184
1185 FEATURE_LIST="
1186     gray
1187     hardcoded_tables
1188     runtime_cpudetect
1189     safe_bitstream_reader
1190     shared
1191     small
1192     sram
1193     static
1194     swscale_alpha
1195 "
1196
1197 HWACCEL_LIST="
1198     dxva2
1199     vaapi
1200     vda
1201     vdpau
1202 "
1203
1204 LIBRARY_LIST="
1205     avcodec
1206     avdevice
1207     avfilter
1208     avformat
1209     avresample
1210     avutil
1211     swscale
1212 "
1213
1214 LICENSE_LIST="
1215     gpl
1216     nonfree
1217     version3
1218 "
1219
1220 PROGRAM_LIST="
1221     avconv
1222     avplay
1223     avprobe
1224 "
1225
1226 SUBSYSTEM_LIST="
1227     dct
1228     doc
1229     error_resilience
1230     faan
1231     fft
1232     lsp
1233     lzo
1234     mdct
1235     network
1236     rdft
1237 "
1238
1239 CONFIG_LIST="
1240     $COMPONENT_LIST
1241     $EXAMPLE_LIST
1242     $EXTERNAL_LIBRARY_LIST
1243     $FEATURE_LIST
1244     $HWACCEL_LIST
1245     $LICENSE_LIST
1246     $LIBRARY_LIST
1247     $PROGRAM_LIST
1248     $SUBSYSTEM_LIST
1249     memalign_hack
1250     neon_clobber_test
1251     pic
1252     pod2man
1253     texi2html
1254     thumb
1255     xmm_clobber_test
1256 "
1257
1258 THREADS_LIST="
1259     pthreads
1260     w32threads
1261 "
1262
1263 ATOMICS_LIST="
1264     atomics_gcc
1265     atomics_suncc
1266     atomics_win32
1267 "
1268
1269 ARCH_LIST="
1270     aarch64
1271     alpha
1272     arm
1273     avr32
1274     avr32_ap
1275     avr32_uc
1276     bfin
1277     ia64
1278     m68k
1279     mips
1280     mips64
1281     parisc
1282     ppc
1283     ppc64
1284     s390
1285     sh4
1286     sparc
1287     sparc64
1288     tilegx
1289     tilepro
1290     tomi
1291     x86
1292     x86_32
1293     x86_64
1294 "
1295
1296 ARCH_EXT_LIST_ARM="
1297     armv5te
1298     armv6
1299     armv6t2
1300     armv8
1301     neon
1302     vfp
1303     vfpv3
1304 "
1305
1306 ARCH_EXT_LIST_X86_SIMD="
1307     amd3dnow
1308     amd3dnowext
1309     avx
1310     avx2
1311     fma3
1312     fma4
1313     mmx
1314     mmxext
1315     sse
1316     sse2
1317     sse3
1318     sse4
1319     sse42
1320     ssse3
1321     xop
1322 "
1323
1324 ARCH_EXT_LIST_PPC="
1325     altivec
1326     dcbzl
1327     ldbrx
1328     ppc4xx
1329 "
1330
1331 ARCH_EXT_LIST_X86="
1332     $ARCH_EXT_LIST_X86_SIMD
1333     cpunop
1334     i686
1335 "
1336
1337 ARCH_EXT_LIST="
1338     $ARCH_EXT_LIST_ARM
1339     $ARCH_EXT_LIST_PPC
1340     $ARCH_EXT_LIST_X86
1341     loongson
1342     vis
1343 "
1344
1345 ARCH_FEATURES="
1346     aligned_stack
1347     fast_64bit
1348     fast_clz
1349     fast_cmov
1350     local_aligned_8
1351     local_aligned_16
1352     simd_align_16
1353 "
1354
1355 BUILTIN_LIST="
1356     atomic_cas_ptr
1357     machine_rw_barrier
1358     MemoryBarrier
1359     mm_empty
1360     rdtsc
1361     sync_val_compare_and_swap
1362 "
1363 HAVE_LIST_CMDLINE="
1364     inline_asm
1365     symver
1366     yasm
1367 "
1368
1369 HAVE_LIST_PUB="
1370     bigendian
1371     fast_unaligned
1372 "
1373
1374 HEADERS_LIST="
1375     alsa_asoundlib_h
1376     altivec_h
1377     arpa_inet_h
1378     cdio_paranoia_h
1379     cdio_paranoia_paranoia_h
1380     dev_bktr_ioctl_bt848_h
1381     dev_bktr_ioctl_meteor_h
1382     dev_ic_bt8xx_h
1383     dev_video_bktr_ioctl_bt848_h
1384     dev_video_meteor_ioctl_meteor_h
1385     direct_h
1386     dlfcn_h
1387     dxva_h
1388     gsm_h
1389     io_h
1390     mach_mach_time_h
1391     machine_ioctl_bt848_h
1392     machine_ioctl_meteor_h
1393     malloc_h
1394     poll_h
1395     sndio_h
1396     soundcard_h
1397     sys_mman_h
1398     sys_param_h
1399     sys_resource_h
1400     sys_select_h
1401     sys_soundcard_h
1402     sys_time_h
1403     sys_un_h
1404     sys_videoio_h
1405     unistd_h
1406     windows_h
1407     winsock2_h
1408 "
1409
1410 INTRINSICS_LIST="
1411     intrinsics_neon
1412 "
1413
1414 MATH_FUNCS="
1415     atanf
1416     atan2f
1417     cbrtf
1418     cosf
1419     exp2
1420     exp2f
1421     expf
1422     isinf
1423     isnan
1424     ldexpf
1425     llrint
1426     llrintf
1427     log2
1428     log2f
1429     log10f
1430     lrint
1431     lrintf
1432     powf
1433     rint
1434     round
1435     roundf
1436     sinf
1437     trunc
1438     truncf
1439 "
1440
1441 SYSTEM_FUNCS="
1442     aligned_malloc
1443     clock_gettime
1444     closesocket
1445     CommandLineToArgvW
1446     CoTaskMemFree
1447     CryptGenRandom
1448     dlopen
1449     fcntl
1450     flt_lim
1451     fork
1452     getaddrinfo
1453     gethrtime
1454     getopt
1455     GetProcessAffinityMask
1456     GetProcessMemoryInfo
1457     GetProcessTimes
1458     getrusage
1459     getservbyport
1460     GetSystemTimeAsFileTime
1461     gettimeofday
1462     gmtime_r
1463     inet_aton
1464     isatty
1465     jack_port_get_latency_range
1466     localtime_r
1467     mach_absolute_time
1468     MapViewOfFile
1469     MoveFileExA
1470     memalign
1471     mkstemp
1472     mmap
1473     mprotect
1474     nanosleep
1475     posix_memalign
1476     sched_getaffinity
1477     SetConsoleTextAttribute
1478     setmode
1479     setrlimit
1480     Sleep
1481     strerror_r
1482     strptime
1483     sysconf
1484     sysctl
1485     usleep
1486     VirtualAlloc
1487 "
1488
1489 TOOLCHAIN_FEATURES="
1490     as_dn_directive
1491     as_func
1492     asm_mod_q
1493     attribute_may_alias
1494     attribute_packed
1495     ebp_available
1496     ebx_available
1497     gnu_as
1498     ibm_asm
1499     inline_asm_labels
1500     pragma_deprecated
1501     symver_asm_label
1502     symver_gnu_asm
1503     vfp_args
1504     xform_asm
1505     xmm_clobbers
1506 "
1507
1508 TYPES_LIST="
1509     CONDITION_VARIABLE_Ptr
1510     socklen_t
1511     struct_addrinfo
1512     struct_group_source_req
1513     struct_ip_mreq_source
1514     struct_ipv6_mreq
1515     struct_pollfd
1516     struct_rusage_ru_maxrss
1517     struct_sockaddr_in6
1518     struct_sockaddr_sa_len
1519     struct_sockaddr_storage
1520     struct_v4l2_frmivalenum_discrete
1521 "
1522
1523 HAVE_LIST="
1524     $ARCH_EXT_LIST
1525     $(add_suffix _external $ARCH_EXT_LIST)
1526     $(add_suffix _inline   $ARCH_EXT_LIST)
1527     $ARCH_FEATURES
1528     $ATOMICS_LIST
1529     $BUILTIN_LIST
1530     $HAVE_LIST_CMDLINE
1531     $HAVE_LIST_PUB
1532     $HEADERS_LIST
1533     $INTRINSICS_LIST
1534     $MATH_FUNCS
1535     $SYSTEM_FUNCS
1536     $THREADS_LIST
1537     $TOOLCHAIN_FEATURES
1538     $TYPES_LIST
1539     atomics_native
1540     dos_paths
1541     dxva2_lib
1542     libc_msvcrt
1543     libdc1394_1
1544     libdc1394_2
1545     sdl
1546     threads
1547     vdpau_x11
1548     xlib
1549 "
1550
1551 # options emitted with CONFIG_ prefix but not available on the command line
1552 CONFIG_EXTRA="
1553     aandcttables
1554     ac3dsp
1555     audio_frame_queue
1556     audiodsp
1557     blockdsp
1558     bswapdsp
1559     cabac
1560     dvprofile
1561     faandct
1562     faanidct
1563     fdctdsp
1564     gcrypt
1565     golomb
1566     gplv3
1567     h263dsp
1568     h264chroma
1569     h264dsp
1570     h264pred
1571     h264qpel
1572     hpeldsp
1573     huffman
1574     huffyuvdsp
1575     huffyuvencdsp
1576     idctdsp
1577     iirfilter
1578     intrax8
1579     lgplv3
1580     lpc
1581     me_cmp
1582     mpeg_er
1583     mpegaudio
1584     mpegaudiodsp
1585     mpegvideo
1586     mpegvideoenc
1587     nettle
1588     pixblockdsp
1589     qpeldsp
1590     rangecoder
1591     riffdec
1592     riffenc
1593     rtpdec
1594     rtpenc_chain
1595     sinewin
1596     startcode
1597     tpeldsp
1598     videodsp
1599     vp3dsp
1600     wma_freqs
1601 "
1602
1603 CMDLINE_SELECT="
1604     $ARCH_EXT_LIST
1605     $CONFIG_LIST
1606     $HAVE_LIST_CMDLINE
1607     $THREADS_LIST
1608     asm
1609     cross_compile
1610     debug
1611     extra_warnings
1612     logging
1613     lto
1614     optimizations
1615     rpath
1616 "
1617
1618 PATHS_LIST="
1619     bindir
1620     datadir
1621     docdir
1622     incdir
1623     libdir
1624     mandir
1625     prefix
1626     shlibdir
1627 "
1628
1629 CMDLINE_SET="
1630     $PATHS_LIST
1631     ar
1632     arch
1633     as
1634     build_suffix
1635     cc
1636     cpu
1637     cross_prefix
1638     dep_cc
1639     extra_version
1640     host_cc
1641     host_cflags
1642     host_ld
1643     host_ldflags
1644     host_libs
1645     host_os
1646     ld
1647     logfile
1648     malloc_prefix
1649     nm
1650     optflags
1651     pkg_config
1652     pkg_config_flags
1653     random_seed
1654     samples
1655     sysinclude
1656     sysroot
1657     target_exec
1658     target_os
1659     target_path
1660     target_samples
1661     toolchain
1662 "
1663
1664 CMDLINE_APPEND="
1665     extra_cflags
1666     host_cppflags
1667 "
1668
1669 # code dependency declarations
1670
1671 # architecture extensions
1672
1673 armv5te_deps="arm"
1674 armv6_deps="arm"
1675 armv6t2_deps="arm"
1676 armv8_deps="aarch64"
1677 neon_deps_any="aarch64 arm"
1678 intrinsics_neon_deps="neon"
1679 vfp_deps_any="aarch64 arm"
1680 vfpv3_deps="vfp"
1681
1682 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1683
1684 altivec_deps="ppc"
1685 ppc4xx_deps="ppc"
1686
1687 cpunop_deps="i686"
1688 x86_64_select="i686"
1689 x86_64_suggest="fast_cmov"
1690
1691 amd3dnow_deps="mmx"
1692 amd3dnowext_deps="amd3dnow"
1693 i686_deps="x86"
1694 mmx_deps="x86"
1695 mmxext_deps="mmx"
1696 sse_deps="mmxext"
1697 sse2_deps="sse"
1698 sse3_deps="sse2"
1699 ssse3_deps="sse3"
1700 sse4_deps="ssse3"
1701 sse42_deps="sse4"
1702 avx_deps="sse42"
1703 xop_deps="avx"
1704 fma3_deps="avx"
1705 fma4_deps="avx"
1706 avx2_deps="avx"
1707
1708 mmx_external_deps="yasm"
1709 mmx_inline_deps="inline_asm"
1710 mmx_suggest="mmx_external mmx_inline"
1711
1712 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1713     eval dep=\$${ext}_deps
1714     eval ${ext}_external_deps='"${dep}_external"'
1715     eval ${ext}_inline_deps='"${dep}_inline"'
1716     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1717 done
1718
1719 aligned_stack_if_any="aarch64 ppc x86"
1720 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1721 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1722 fast_unaligned_if_any="aarch64 ppc x86"
1723 simd_align_16_if_any="altivec neon sse"
1724
1725 # system capabilities
1726 log2_deps="!libc_msvcrt"
1727
1728 symver_if_any="symver_asm_label symver_gnu_asm"
1729
1730 # threading support
1731 atomics_gcc_if="sync_val_compare_and_swap"
1732 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1733 atomics_win32_if="MemoryBarrier"
1734 atomics_native_if_any="$ATOMICS_LIST"
1735 w32threads_deps="atomics_native"
1736 threads_if_any="$THREADS_LIST"
1737
1738 # subsystems
1739 dct_select="rdft"
1740 error_resilience_select="me_cmp"
1741 faandct_deps="faan fdctdsp"
1742 faanidct_deps="faan idctdsp"
1743 intrax8_select="error_resilience"
1744 mdct_select="fft"
1745 rdft_select="fft"
1746 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1747 mpeg_er_select="error_resilience"
1748 mpegaudio_select="mpegaudiodsp"
1749 mpegaudiodsp_select="dct"
1750 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp videodsp"
1751 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1752
1753 # decoders / encoders
1754 aac_decoder_select="mdct sinewin"
1755 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1756 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1757 ac3_decoder_select="ac3_parser ac3dsp bswapdsp mdct"
1758 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1759 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1760 aic_decoder_select="golomb idctdsp"
1761 alac_encoder_select="lpc"
1762 als_decoder_select="bswapdsp"
1763 amrnb_decoder_select="lsp"
1764 amrwb_decoder_select="lsp"
1765 amv_decoder_select="sp5x_decoder"
1766 ape_decoder_select="bswapdsp"
1767 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1768 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1769 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1770 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1771 atrac1_decoder_select="mdct sinewin"
1772 atrac3_decoder_select="mdct"
1773 atrac3p_decoder_select="mdct sinewin"
1774 bink_decoder_select="blockdsp hpeldsp"
1775 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1776 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1777 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1778 cllc_decoder_select="bswapdsp"
1779 comfortnoise_encoder_select="lpc"
1780 cook_decoder_select="audiodsp mdct sinewin"
1781 cscd_decoder_select="lzo"
1782 cscd_decoder_suggest="zlib"
1783 dca_decoder_select="mdct"
1784 dnxhd_decoder_select="blockdsp idctdsp"
1785 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1786 dvvideo_decoder_select="dvprofile idctdsp"
1787 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1788 dxa_decoder_deps="zlib"
1789 eac3_decoder_select="ac3_decoder"
1790 eac3_encoder_select="ac3_encoder"
1791 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1792 eatgq_decoder_select="aandcttables idctdsp"
1793 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpeg1video_decoder"
1794 exr_decoder_deps="zlib"
1795 ffv1_decoder_select="golomb rangecoder"
1796 ffv1_encoder_select="rangecoder"
1797 ffvhuff_decoder_select="huffyuv_decoder"
1798 ffvhuff_encoder_select="huffyuv_encoder"
1799 fic_decoder_select="golomb"
1800 flac_decoder_select="golomb"
1801 flac_encoder_select="bswapdsp golomb lpc"
1802 flashsv_decoder_deps="zlib"
1803 flashsv_encoder_deps="zlib"
1804 flashsv2_decoder_deps="zlib"
1805 flv_decoder_select="h263_decoder"
1806 flv_encoder_select="h263_encoder"
1807 fourxm_decoder_select="blockdsp bswapdsp"
1808 fraps_decoder_select="bswapdsp huffman"
1809 g2m_decoder_deps="zlib"
1810 g2m_decoder_select="blockdsp idctdsp"
1811 h261_decoder_select="mpeg_er mpegvideo"
1812 h261_encoder_select="aandcttables mpegvideoenc"
1813 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
1814 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1815 h263i_decoder_select="h263_decoder"
1816 h263p_encoder_select="h263_encoder"
1817 h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel startcode videodsp"
1818 h264_decoder_suggest="error_resilience"
1819 hevc_decoder_select="bswapdsp cabac golomb videodsp"
1820 huffyuv_decoder_select="bswapdsp huffyuvdsp"
1821 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
1822 iac_decoder_select="imc_decoder"
1823 imc_decoder_select="bswapdsp fft mdct sinewin"
1824 indeo3_decoder_select="hpeldsp"
1825 interplay_video_decoder_select="hpeldsp"
1826 jpegls_decoder_select="golomb mjpeg_decoder"
1827 jpegls_encoder_select="golomb"
1828 jv_decoder_select="blockdsp"
1829 lagarith_decoder_select="huffyuvdsp"
1830 ljpeg_encoder_select="aandcttables idctdsp"
1831 loco_decoder_select="golomb"
1832 mdec_decoder_select="blockdsp idctdsp mpegvideo"
1833 metasound_decoder_select="lsp mdct sinewin"
1834 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
1835 mjpeg_decoder_select="blockdsp hpeldsp idctdsp"
1836 mjpeg_encoder_select="aandcttables mpegvideoenc"
1837 mjpegb_decoder_select="mjpeg_decoder"
1838 mlp_decoder_select="mlp_parser"
1839 motionpixels_decoder_select="bswapdsp"
1840 mp1_decoder_select="mpegaudio"
1841 mp1float_decoder_select="mpegaudio"
1842 mp2_decoder_select="mpegaudio"
1843 mp2float_decoder_select="mpegaudio"
1844 mp3_decoder_select="mpegaudio"
1845 mp3adu_decoder_select="mpegaudio"
1846 mp3adufloat_decoder_select="mpegaudio"
1847 mp3float_decoder_select="mpegaudio"
1848 mp3on4_decoder_select="mpegaudio"
1849 mp3on4float_decoder_select="mpegaudio"
1850 mpc7_decoder_select="bswapdsp mpegaudiodsp"
1851 mpc8_decoder_select="mpegaudiodsp"
1852 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
1853 mpeg_xvmc_decoder_select="mpeg2video_decoder"
1854 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
1855 mpeg1video_encoder_select="aandcttables mpegvideoenc"
1856 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
1857 mpeg2video_encoder_select="aandcttables mpegvideoenc"
1858 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
1859 mpeg4_encoder_select="h263_encoder"
1860 msmpeg4v1_decoder_select="h263_decoder"
1861 msmpeg4v2_decoder_select="h263_decoder"
1862 msmpeg4v2_encoder_select="h263_encoder"
1863 msmpeg4v3_decoder_select="h263_decoder"
1864 msmpeg4v3_encoder_select="h263_encoder"
1865 mss2_decoder_select="error_resilience mpeg_er qpeldsp vc1_decoder"
1866 mxpeg_decoder_select="mjpeg_decoder"
1867 nellymoser_decoder_select="mdct sinewin"
1868 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
1869 nuv_decoder_select="idctdsp lzo"
1870 on2avc_decoder_select="mdct"
1871 opus_decoder_deps="avresample"
1872 png_decoder_deps="zlib"
1873 png_encoder_deps="zlib"
1874 png_encoder_select="huffyuvencdsp"
1875 prores_decoder_select="idctdsp"
1876 prores_encoder_select="fdctdsp"
1877 qcelp_decoder_select="lsp"
1878 qdm2_decoder_select="mdct rdft mpegaudiodsp"
1879 ra_144_encoder_select="audio_frame_queue lpc"
1880 ralf_decoder_select="golomb"
1881 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
1882 rv10_encoder_select="h263_encoder"
1883 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
1884 rv20_encoder_select="h263_encoder"
1885 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo videodsp"
1886 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo videodsp"
1887 shorten_decoder_select="golomb"
1888 sipr_decoder_select="lsp"
1889 sp5x_decoder_select="mjpeg_decoder"
1890 svq1_decoder_select="hpeldsp"
1891 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
1892 svq3_decoder_select="h264_decoder hpeldsp tpeldsp"
1893 svq3_decoder_suggest="zlib"
1894 tak_decoder_select="audiodsp"
1895 theora_decoder_select="vp3_decoder"
1896 thp_decoder_select="mjpeg_decoder"
1897 tiff_decoder_suggest="zlib"
1898 tiff_encoder_suggest="zlib"
1899 truehd_decoder_select="mlp_decoder"
1900 truemotion2_decoder_select="bswapdsp"
1901 truespeech_decoder_select="bswapdsp"
1902 tscc_decoder_deps="zlib"
1903 twinvq_decoder_select="mdct lsp sinewin"
1904 utvideo_decoder_select="bswapdsp"
1905 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
1906 vble_decoder_select="huffyuvdsp"
1907 vc1_decoder_select="blockdsp error_resilience h263_decoder h264chroma h264qpel intrax8 mpeg_er qpeldsp startcode"
1908 vc1image_decoder_select="vc1_decoder"
1909 vorbis_decoder_select="mdct"
1910 vorbis_encoder_select="mdct"
1911 vp3_decoder_select="hpeldsp vp3dsp videodsp"
1912 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp"
1913 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp"
1914 vp6a_decoder_select="vp6_decoder"
1915 vp6f_decoder_select="vp6_decoder"
1916 vp7_decoder_select="h264pred videodsp"
1917 vp8_decoder_select="h264pred videodsp"
1918 vp9_decoder_select="videodsp"
1919 webp_decoder_select="vp8_decoder"
1920 wmapro_decoder_select="mdct sinewin wma_freqs"
1921 wmav1_decoder_select="mdct sinewin wma_freqs"
1922 wmav1_encoder_select="mdct sinewin wma_freqs"
1923 wmav2_decoder_select="mdct sinewin wma_freqs"
1924 wmav2_encoder_select="mdct sinewin wma_freqs"
1925 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
1926 wmv1_decoder_select="h263_decoder"
1927 wmv1_encoder_select="h263_encoder"
1928 wmv2_decoder_select="blockdsp h263_decoder idctdsp intrax8 videodsp"
1929 wmv2_encoder_select="h263_encoder"
1930 wmv3_decoder_select="vc1_decoder"
1931 wmv3image_decoder_select="wmv3_decoder"
1932 zerocodec_decoder_deps="zlib"
1933 zlib_decoder_deps="zlib"
1934 zlib_encoder_deps="zlib"
1935 zmbv_decoder_deps="zlib"
1936 zmbv_encoder_deps="zlib"
1937
1938 # hardware accelerators
1939 dxva2_deps="dxva2api_h"
1940 vaapi_deps="va_va_h"
1941 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
1942 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
1943 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
1944
1945 h263_vaapi_hwaccel_deps="vaapi"
1946 h263_vaapi_hwaccel_select="h263_decoder"
1947 h263_vdpau_hwaccel_deps="vdpau"
1948 h263_vdpau_hwaccel_select="h263_decoder"
1949 h264_dxva2_hwaccel_deps="dxva2"
1950 h264_dxva2_hwaccel_select="h264_decoder"
1951 h264_vaapi_hwaccel_deps="vaapi"
1952 h264_vaapi_hwaccel_select="h264_decoder"
1953 h264_vda_hwaccel_deps="vda"
1954 h264_vda_hwaccel_select="h264_decoder"
1955 h264_vda_old_hwaccel_deps="vda"
1956 h264_vda_old_hwaccel_select="h264_decoder"
1957 h264_vdpau_hwaccel_deps="vdpau"
1958 h264_vdpau_hwaccel_select="h264_decoder"
1959 mpeg1_vdpau_hwaccel_deps="vdpau"
1960 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
1961 mpeg2_dxva2_hwaccel_deps="dxva2"
1962 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
1963 mpeg2_vaapi_hwaccel_deps="vaapi"
1964 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
1965 mpeg2_vdpau_hwaccel_deps="vdpau"
1966 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
1967 mpeg4_vaapi_hwaccel_deps="vaapi"
1968 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
1969 mpeg4_vdpau_hwaccel_deps="vdpau"
1970 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
1971 vc1_dxva2_hwaccel_deps="dxva2"
1972 vc1_dxva2_hwaccel_select="vc1_decoder"
1973 vc1_vaapi_hwaccel_deps="vaapi"
1974 vc1_vaapi_hwaccel_select="vc1_decoder"
1975 vc1_vdpau_hwaccel_deps="vdpau"
1976 vc1_vdpau_hwaccel_select="vc1_decoder"
1977 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
1978 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
1979 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
1980
1981 # parsers
1982 h264_parser_select="h264_decoder"
1983 mpegvideo_parser_select="mpegvideo"
1984 mpeg4video_parser_select="error_resilience h263dsp mpeg_er mpegvideo qpeldsp"
1985 vc1_parser_select="mpegvideo startcode"
1986
1987 # external libraries
1988 libfaac_encoder_deps="libfaac"
1989 libfaac_encoder_select="audio_frame_queue"
1990 libfdk_aac_decoder_deps="libfdk_aac"
1991 libfdk_aac_encoder_deps="libfdk_aac"
1992 libfdk_aac_encoder_select="audio_frame_queue"
1993 libgsm_decoder_deps="libgsm"
1994 libgsm_encoder_deps="libgsm"
1995 libgsm_ms_decoder_deps="libgsm"
1996 libgsm_ms_encoder_deps="libgsm"
1997 libilbc_decoder_deps="libilbc"
1998 libilbc_encoder_deps="libilbc"
1999 libmp3lame_encoder_deps="libmp3lame"
2000 libmp3lame_encoder_select="audio_frame_queue"
2001 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2002 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2003 libopencore_amrnb_encoder_select="audio_frame_queue"
2004 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2005 libopenjpeg_decoder_deps="libopenjpeg"
2006 libopenjpeg_encoder_deps="libopenjpeg"
2007 libopus_decoder_deps="libopus"
2008 libopus_encoder_deps="libopus"
2009 libopus_encoder_select="audio_frame_queue"
2010 libschroedinger_decoder_deps="libschroedinger"
2011 libschroedinger_encoder_deps="libschroedinger"
2012 libspeex_decoder_deps="libspeex"
2013 libspeex_encoder_deps="libspeex"
2014 libspeex_encoder_select="audio_frame_queue"
2015 libtheora_encoder_deps="libtheora"
2016 libtwolame_encoder_deps="libtwolame"
2017 libvo_aacenc_encoder_deps="libvo_aacenc"
2018 libvo_aacenc_encoder_select="audio_frame_queue"
2019 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2020 libvorbis_encoder_deps="libvorbis"
2021 libvorbis_encoder_select="audio_frame_queue"
2022 libvpx_vp8_decoder_deps="libvpx"
2023 libvpx_vp8_encoder_deps="libvpx"
2024 libvpx_vp9_decoder_deps="libvpx"
2025 libvpx_vp9_encoder_deps="libvpx"
2026 libwavpack_encoder_deps="libwavpack"
2027 libwebp_encoder_deps="libwebp"
2028 libx264_encoder_deps="libx264"
2029 libx265_encoder_deps="libx265"
2030 libxavs_encoder_deps="libxavs"
2031 libxvid_encoder_deps="libxvid"
2032
2033 # demuxers / muxers
2034 ac3_demuxer_select="ac3_parser"
2035 asf_demuxer_select="riffdec"
2036 asf_muxer_select="riffenc"
2037 asf_stream_muxer_select="asf_muxer"
2038 avi_demuxer_select="riffdec"
2039 avi_muxer_select="riffenc"
2040 avisynth_demuxer_deps="avisynth"
2041 avisynth_demuxer_select="riffdec"
2042 caf_demuxer_select="riffdec"
2043 dash_muxer_select="mp4_muxer"
2044 dirac_demuxer_select="dirac_parser"
2045 dv_demuxer_select="dvprofile"
2046 dv_muxer_select="dvprofile"
2047 dxa_demuxer_select="riffdec"
2048 eac3_demuxer_select="ac3_parser"
2049 f4v_muxer_select="mov_muxer"
2050 flac_demuxer_select="flac_parser"
2051 hds_muxer_select="flv_muxer"
2052 hls_muxer_select="mpegts_muxer"
2053 ipod_muxer_select="mov_muxer"
2054 ismv_muxer_select="mov_muxer"
2055 matroska_audio_muxer_select="matroska_muxer"
2056 matroska_demuxer_select="riffdec"
2057 matroska_demuxer_suggest="bzlib lzo zlib"
2058 matroska_muxer_select="riffenc"
2059 mmf_muxer_select="riffenc"
2060 mov_demuxer_select="riffdec"
2061 mov_demuxer_suggest="zlib"
2062 mov_muxer_select="riffenc rtpenc_chain"
2063 mp3_demuxer_select="mpegaudio_parser"
2064 mp4_muxer_select="mov_muxer"
2065 mpegts_muxer_select="adts_muxer latm_muxer"
2066 mpegtsraw_demuxer_select="mpegts_demuxer"
2067 mxf_d10_muxer_select="mxf_muxer"
2068 nut_muxer_select="riffenc"
2069 nuv_demuxer_select="riffdec"
2070 oga_muxer_select="ogg_muxer"
2071 ogg_demuxer_select="golomb"
2072 opus_muxer_select="ogg_muxer"
2073 psp_muxer_select="mov_muxer"
2074 rtp_demuxer_select="sdp_demuxer"
2075 rtpdec_select="asf_demuxer rm_demuxer rtp_protocol mpegts_demuxer mov_demuxer"
2076 rtsp_demuxer_select="http_protocol rtpdec"
2077 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2078 sap_demuxer_select="sdp_demuxer"
2079 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2080 sdp_demuxer_select="rtpdec"
2081 smoothstreaming_muxer_select="ismv_muxer"
2082 spdif_muxer_select="aac_parser"
2083 spx_muxer_select="ogg_muxer"
2084 tak_demuxer_select="tak_parser"
2085 tg2_muxer_select="mov_muxer"
2086 tgp_muxer_select="mov_muxer"
2087 w64_demuxer_select="wav_demuxer"
2088 wav_demuxer_select="riffdec"
2089 wav_muxer_select="riffenc"
2090 webm_muxer_select="riffenc"
2091 wtv_demuxer_select="riffdec"
2092 xmv_demuxer_select="riffdec"
2093 xwma_demuxer_select="riffdec"
2094
2095 # indevs / outdevs
2096 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2097 alsa_outdev_deps="alsa_asoundlib_h"
2098 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2099 dv1394_indev_deps="dv1394"
2100 dv1394_indev_select="dv_demuxer"
2101 fbdev_indev_deps="linux_fb_h"
2102 jack_indev_deps="jack_jack_h pthreads"
2103 libcdio_indev_deps="libcdio"
2104 libdc1394_indev_deps="libdc1394"
2105 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2106 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2107 pulse_indev_deps="libpulse"
2108 sndio_indev_deps="sndio_h"
2109 sndio_outdev_deps="sndio_h"
2110 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2111 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2112 vfwcap_indev_extralibs="-lavicap32"
2113 x11grab_indev_deps="x11grab"
2114 x11grab_xcb_indev_deps="libxcb"
2115
2116 # protocols
2117 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2118 ffrtmpcrypt_protocol_deps_any="gcrypt nettle openssl"
2119 ffrtmpcrypt_protocol_select="tcp_protocol"
2120 ffrtmphttp_protocol_deps="!librtmp_protocol"
2121 ffrtmphttp_protocol_select="http_protocol"
2122 gopher_protocol_select="network"
2123 http_protocol_select="tcp_protocol"
2124 httpproxy_protocol_select="tcp_protocol"
2125 https_protocol_select="tls_protocol"
2126 icecast_protocol_select="http_protocol"
2127 librtmp_protocol_deps="librtmp"
2128 librtmpe_protocol_deps="librtmp"
2129 librtmps_protocol_deps="librtmp"
2130 librtmpt_protocol_deps="librtmp"
2131 librtmpte_protocol_deps="librtmp"
2132 mmsh_protocol_select="http_protocol"
2133 mmst_protocol_select="network"
2134 rtmp_protocol_deps="!librtmp_protocol"
2135 rtmp_protocol_select="tcp_protocol"
2136 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2137 rtmps_protocol_deps="!librtmp_protocol"
2138 rtmps_protocol_select="tls_protocol"
2139 rtmpt_protocol_select="ffrtmphttp_protocol"
2140 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2141 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2142 rtp_protocol_select="udp_protocol"
2143 sctp_protocol_deps="struct_sctp_event_subscribe"
2144 sctp_protocol_select="network"
2145 srtp_protocol_select="rtp_protocol"
2146 tcp_protocol_select="network"
2147 tls_protocol_deps_any="openssl gnutls"
2148 tls_protocol_select="tcp_protocol"
2149 udp_protocol_select="network"
2150 unix_protocol_deps="sys_un_h"
2151 unix_protocol_select="network"
2152
2153 # filters
2154 blackframe_filter_deps="gpl"
2155 boxblur_filter_deps="gpl"
2156 bs2b_filter_deps="libbs2b"
2157 cropdetect_filter_deps="gpl"
2158 delogo_filter_deps="gpl"
2159 drawtext_filter_deps="libfreetype"
2160 frei0r_filter_deps="frei0r dlopen"
2161 frei0r_filter_extralibs='$ldl'
2162 frei0r_src_filter_deps="frei0r dlopen"
2163 frei0r_src_filter_extralibs='$ldl'
2164 hqdn3d_filter_deps="gpl"
2165 interlace_filter_deps="gpl"
2166 ocv_filter_deps="libopencv"
2167 resample_filter_deps="avresample"
2168 scale_filter_deps="swscale"
2169
2170 # examples
2171 avcodec_example_deps="avcodec avutil"
2172 filter_audio_example_deps="avfilter avutil"
2173 metadata_example_deps="avformat avutil"
2174 output_example_deps="avcodec avformat avutil swscale"
2175 transcode_aac_example_deps="avcodec avformat avresample"
2176
2177 # libraries, in linking order
2178 avcodec_deps="avutil"
2179 avdevice_deps="avformat avcodec avutil"
2180 avfilter_deps="avutil"
2181 avformat_deps="avcodec avutil"
2182 avresample_deps="avutil"
2183 swscale_deps="avutil"
2184
2185 # programs
2186 avconv_deps="avcodec avfilter avformat avresample swscale"
2187 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2188                fps_filter null_filter resample_filter scale_filter
2189                setpts_filter trim_filter"
2190 avplay_deps="avcodec avformat avresample swscale sdl"
2191 avplay_libs='$sdl_libs'
2192 avplay_select="rdft"
2193 avprobe_deps="avcodec avformat"
2194
2195 # documentation
2196 pod2man_deps="doc"
2197 texi2html_deps="doc"
2198
2199 # default parameters
2200
2201 logfile="config.log"
2202
2203 # installation paths
2204 prefix_default="/usr/local"
2205 bindir_default='${prefix}/bin'
2206 datadir_default='${prefix}/share/avconv'
2207 docdir_default='${prefix}/share/doc/libav'
2208 incdir_default='${prefix}/include'
2209 libdir_default='${prefix}/lib'
2210 mandir_default='${prefix}/share/man'
2211 shlibdir_default="$libdir_default"
2212
2213 # toolchain
2214 ar_default="ar"
2215 cc_default="gcc"
2216 host_cc_default="gcc"
2217 cp_f="cp -f"
2218 ln_s="ln -s -f"
2219 nm_default="nm -g"
2220 objformat="elf"
2221 pkg_config_default=pkg-config
2222 ranlib="ranlib"
2223 strip="strip"
2224 yasmexe="yasm"
2225
2226 # machine
2227 arch_default=$(uname -m)
2228 cpu="generic"
2229 intrinsics="none"
2230
2231 # OS
2232 target_os_default=$(tolower $(uname -s))
2233 host_os=$target_os_default
2234
2235 # configurable options
2236 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2237
2238 enable asm
2239 enable debug
2240 enable doc
2241 enable faan faandct faanidct
2242 enable optimizations
2243 enable safe_bitstream_reader
2244 enable static
2245 enable swscale_alpha
2246
2247 # By default, enable only those hwaccels that have no external dependencies.
2248 enable dxva2 vdpau
2249
2250 # build settings
2251 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2252 LIBPREF="lib"
2253 LIBSUF=".a"
2254 FULLNAME='$(NAME)$(BUILDSUF)'
2255 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2256 SLIBPREF="lib"
2257 SLIBSUF=".so"
2258 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2259 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2260 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2261 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2262 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2263 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2264
2265 asflags_filter=echo
2266 cflags_filter=echo
2267 ldflags_filter=echo
2268
2269 AS_C='-c'
2270 AS_O='-o $@'
2271 CC_C='-c'
2272 CC_E='-E -o $@'
2273 CC_O='-o $@'
2274 LD_O='-o $@'
2275 LD_LIB='-l%'
2276 LD_PATH='-L'
2277 HOSTCC_C='-c'
2278 HOSTCC_E='-E -o $@'
2279 HOSTCC_O='-o $@'
2280 HOSTLD_O='-o $@'
2281
2282 host_libs='-lm'
2283 host_cflags_filter=echo
2284 host_ldflags_filter=echo
2285
2286 target_path='$(CURDIR)'
2287
2288 # since the object filename is not given with the -MM flag, the compiler
2289 # is only able to print the basename, and we must add the path ourselves
2290 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2291 DEPFLAGS='-MM'
2292
2293 # find source path
2294 if test -f configure; then
2295     source_path=.
2296 else
2297     source_path=$(cd $(dirname "$0"); pwd)
2298     echo "$source_path" | grep -q '[[:blank:]]' &&
2299         die "Out of tree builds are impossible with whitespace in source path."
2300     test -e "$source_path/config.h" &&
2301         die "Out of tree builds are impossible with config.h in source dir."
2302 fi
2303
2304 for v in "$@"; do
2305     r=${v#*=}
2306     l=${v%"$r"}
2307     r=$(sh_quote "$r")
2308     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2309 done
2310
2311 find_things(){
2312     thing=$1
2313     pattern=$2
2314     file=$source_path/$3
2315     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2316 }
2317
2318 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2319 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2320 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2321 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2322 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2323 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2324 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2325 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2326 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2327 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2328 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2329
2330 ALL_COMPONENTS="
2331     $BSF_LIST
2332     $DECODER_LIST
2333     $DEMUXER_LIST
2334     $ENCODER_LIST
2335     $FILTER_LIST
2336     $HWACCEL_LIST
2337     $INDEV_LIST
2338     $MUXER_LIST
2339     $OUTDEV_LIST
2340     $PARSER_LIST
2341     $PROTOCOL_LIST
2342 "
2343
2344 for n in $COMPONENT_LIST; do
2345     v=$(toupper ${n%s})_LIST
2346     eval enable \$$v
2347     eval ${n}_if_any="\$$v"
2348 done
2349
2350 enable $ARCH_EXT_LIST
2351
2352 die_unknown(){
2353     echo "Unknown option \"$1\"."
2354     echo "See $0 --help for available options."
2355     exit 1
2356 }
2357
2358 print_3_columns() {
2359     cat | tr ' ' '\n' | sort | pr -r -3 -t
2360 }
2361
2362 show_list() {
2363     suffix=_$1
2364     shift
2365     echo $* | sed s/$suffix//g | print_3_columns
2366     exit 0
2367 }
2368
2369 rand_list(){
2370     IFS=', '
2371     set -- $*
2372     unset IFS
2373     for thing; do
2374         comp=${thing%:*}
2375         prob=${thing#$comp}
2376         prob=${prob#:}
2377         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2378         echo "prob ${prob:-0.5}"
2379         printf '%s\n' $comp
2380     done
2381 }
2382
2383 do_random(){
2384     action=$1
2385     shift
2386     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2387     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2388 }
2389
2390 for opt do
2391     optval="${opt#*=}"
2392     case "$opt" in
2393         --extra-ldflags=*)
2394             add_ldflags $optval
2395         ;;
2396         --extra-ldexeflags=*)
2397             add_ldexeflags $optval
2398         ;;
2399         --extra-libs=*)
2400             add_extralibs $optval
2401         ;;
2402         --disable-devices)
2403             disable $INDEV_LIST $OUTDEV_LIST
2404         ;;
2405         --enable-debug=*)
2406             debuglevel="$optval"
2407         ;;
2408         --disable-programs)
2409             disable $PROGRAM_LIST
2410         ;;
2411         --disable-everything)
2412             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2413         ;;
2414         --disable-all)
2415             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2416             disable $LIBRARY_LIST $PROGRAM_LIST doc
2417         ;;
2418         --enable-random|--disable-random)
2419             action=${opt%%-random}
2420             do_random ${action#--} $COMPONENT_LIST
2421         ;;
2422         --enable-random=*|--disable-random=*)
2423             action=${opt%%-random=*}
2424             do_random ${action#--} $optval
2425         ;;
2426         --enable-*=*|--disable-*=*)
2427             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2428             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2429             eval list=\$$(toupper $thing)_LIST
2430             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2431             $action $(filter "$name" $list)
2432         ;;
2433         --enable-avserver|--disable-avserver*)
2434             warn "avserver has been removed, the ${opt} option is only"\
2435                  "provided for compatibility and will be removed in the future"
2436         ;;
2437         --enable-?*|--disable-?*)
2438             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2439             if is_in $option $COMPONENT_LIST; then
2440                 test $action = disable && action=unset
2441                 eval $action \$$(toupper ${option%s})_LIST
2442             elif is_in $option $CMDLINE_SELECT; then
2443                 $action $option
2444             else
2445                 die_unknown $opt
2446             fi
2447         ;;
2448         --list-*)
2449             NAME="${opt#--list-}"
2450             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2451             NAME=${NAME%s}
2452             eval show_list $NAME \$$(toupper $NAME)_LIST
2453         ;;
2454         --help|-h) show_help
2455         ;;
2456         *)
2457             optname="${opt%%=*}"
2458             optname="${optname#--}"
2459             optname=$(echo "$optname" | sed 's/-/_/g')
2460             if is_in $optname $CMDLINE_SET; then
2461                 eval $optname='$optval'
2462             elif is_in $optname $CMDLINE_APPEND; then
2463                 append $optname "$optval"
2464             else
2465                 die_unknown $opt
2466             fi
2467         ;;
2468     esac
2469 done
2470
2471 disabled logging && logfile=/dev/null
2472
2473 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2474 set >> $logfile
2475
2476 test -n "$cross_prefix" && enable cross_compile
2477
2478 if enabled cross_compile; then
2479     test -n "$arch" && test -n "$target_os" ||
2480         die "Must specify target arch and OS when cross-compiling"
2481 fi
2482
2483 ar_default="${cross_prefix}${ar_default}"
2484 cc_default="${cross_prefix}${cc_default}"
2485 nm_default="${cross_prefix}${nm_default}"
2486 pkg_config_default="${cross_prefix}${pkg_config_default}"
2487 ranlib="${cross_prefix}${ranlib}"
2488 strip="${cross_prefix}${strip}"
2489
2490 sysinclude_default="${sysroot}/usr/include"
2491
2492 case "$toolchain" in
2493     clang-asan)
2494         cc_default="clang"
2495         add_cflags  -fsanitize=address
2496         add_ldflags -fsanitize=address
2497     ;;
2498     clang-tsan)
2499         cc_default="clang"
2500         add_cflags  -fsanitize=thread -pie
2501         add_ldflags -fsanitize=thread -pie
2502     ;;
2503     clang-usan)
2504         cc_default="clang"
2505         add_cflags  -fsanitize=undefined -O1
2506         add_ldflags -fsanitize=undefined
2507     ;;
2508     gcc-asan)
2509         cc_default="gcc"
2510         add_cflags  -fsanitize=address
2511         add_ldflags -fsanitize=address
2512     ;;
2513     gcc-tsan)
2514         cc_default="gcc"
2515         add_cflags  -fsanitize=thread -pie -fPIC
2516         add_ldflags -fsanitize=thread -pie -fPIC
2517     ;;
2518     gcc-usan)
2519         cc_default="gcc"
2520         add_cflags  -fsanitize=undefined
2521         add_ldflags -fsanitize=undefined
2522     ;;
2523     valgrind-massif)
2524         target_exec_default="valgrind"
2525         target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2526     ;;
2527     valgrind-memcheck)
2528         target_exec_default="valgrind"
2529         target_exec_args="--track-origins=yes --leak-check=full"
2530     ;;
2531     msvc)
2532         # Check whether the current MSVC version needs the C99 converter.
2533         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2534         # support enough of C99 to build libav. Default to the new
2535         # behaviour if the regexp was unable to match anything, since this
2536         # successfully parses the version number of existing supported
2537         # versions that require the converter (MSVC 2010 and 2012).
2538         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2539         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2540             cc_default="cl"
2541         else
2542             cc_default="c99wrap cl"
2543         fi
2544         ld_default="link"
2545         nm_default="dumpbin -symbols"
2546         ar_default="lib"
2547         target_os_default="win32"
2548         # Use a relative path for TMPDIR. This makes sure all the
2549         # ffconf temp files are written with a relative path, avoiding
2550         # issues with msys/win32 path conversion for MSVC parameters
2551         # such as -Fo<file> or -out:<file>.
2552         TMPDIR=.
2553     ;;
2554     icl)
2555         cc_default="icl"
2556         ld_default="xilink"
2557         nm_default="dumpbin -symbols"
2558         ar_default="xilib"
2559         target_os_default="win32"
2560         TMPDIR=.
2561     ;;
2562     gcov)
2563         add_cflags  -fprofile-arcs -ftest-coverage
2564         add_ldflags -fprofile-arcs -ftest-coverage
2565     ;;
2566     hardened)
2567         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2568         add_cflags   -fno-strict-overflow -fstack-protector-all
2569         add_ldflags  -Wl,-z,relro -Wl,-z,now
2570     ;;
2571     ?*)
2572         die "Unknown toolchain $toolchain"
2573     ;;
2574 esac
2575
2576 set_default arch cc pkg_config sysinclude target_exec target_os
2577 enabled cross_compile || host_cc_default=$cc
2578 set_default host_cc
2579
2580 if ! $pkg_config --version >/dev/null 2>&1; then
2581     warn "$pkg_config not found, library detection may fail."
2582     pkg_config=false
2583 fi
2584
2585 exesuf() {
2586     case $1 in
2587         mingw32*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2588     esac
2589 }
2590
2591 EXESUF=$(exesuf $target_os)
2592 HOSTEXESUF=$(exesuf $host_os)
2593
2594 # set temporary file name
2595 : ${TMPDIR:=$TEMPDIR}
2596 : ${TMPDIR:=$TMP}
2597 : ${TMPDIR:=/tmp}
2598
2599 if ! check_cmd mktemp -u XXXXXX; then
2600     # simple replacement for missing mktemp
2601     # NOT SAFE FOR GENERAL USE
2602     mktemp(){
2603         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2604     }
2605 fi
2606
2607 tmpfile(){
2608     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2609         (set -C; exec > $tmp) 2>/dev/null ||
2610         die "Unable to create temporary file in $TMPDIR."
2611     append TMPFILES $tmp
2612     eval $1=$tmp
2613 }
2614
2615 trap 'rm -f -- $TMPFILES' EXIT
2616
2617 tmpfile TMPASM .asm
2618 tmpfile TMPC   .c
2619 tmpfile TMPE   $EXESUF
2620 tmpfile TMPH   .h
2621 tmpfile TMPO   .o
2622 tmpfile TMPS   .S
2623 tmpfile TMPSH  .sh
2624 tmpfile TMPV   .ver
2625
2626 unset -f mktemp
2627
2628 chmod +x $TMPE
2629
2630 # make sure we can execute files in $TMPDIR
2631 cat > $TMPSH 2>> $logfile <<EOF
2632 #! /bin/sh
2633 EOF
2634 chmod +x $TMPSH >> $logfile 2>&1
2635 if ! $TMPSH >> $logfile 2>&1; then
2636     cat <<EOF
2637 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2638 variable to another directory and make sure that it is not mounted noexec.
2639 EOF
2640     die "Sanity test failed."
2641 fi
2642
2643 armasm_flags(){
2644     for flag; do
2645         case $flag in
2646             # Filter out MSVC cl.exe options from cflags that shouldn't
2647             # be passed to gas-preprocessor
2648             -M[TD]*)                                            ;;
2649             *)                  echo $flag                      ;;
2650         esac
2651    done
2652 }
2653
2654 ccc_flags(){
2655     for flag; do
2656         case $flag in
2657             -std=c99)           echo -c99                       ;;
2658             -mcpu=*)            echo -arch ${flag#*=}           ;;
2659             -mieee)             echo -ieee                      ;;
2660             -O*|-fast)          echo $flag                      ;;
2661             -fno-math-errno)    echo -assume nomath_errno       ;;
2662             -g)                 echo -g3                        ;;
2663             -Wall)              echo -msg_enable level2         ;;
2664             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2665             -Wl,*)              echo $flag                      ;;
2666             -f*|-W*)                                            ;;
2667             *)                  echo $flag                      ;;
2668         esac
2669    done
2670 }
2671
2672 cparser_flags(){
2673     for flag; do
2674         case $flag in
2675             -Wno-switch)             echo -Wno-switch-enum ;;
2676             -Wno-format-zero-length) ;;
2677             -Wdisabled-optimization) ;;
2678             -Wno-pointer-sign)       echo -Wno-other ;;
2679             *)                       echo $flag ;;
2680         esac
2681     done
2682 }
2683
2684 msvc_common_flags(){
2685     for flag; do
2686         case $flag in
2687             # In addition to specifying certain flags under the compiler
2688             # specific filters, they must be specified here as well or else the
2689             # generic catch all at the bottom will print the original flag.
2690             -Wall)                ;;
2691             -std=c99)             ;;
2692             # Common flags
2693             -fomit-frame-pointer) ;;
2694             -g)                   echo -Z7 ;;
2695             -fno-math-errno)      ;;
2696             -fno-common)          ;;
2697             -fno-signed-zeros)    ;;
2698             -fPIC)                ;;
2699             -mthumb)              ;;
2700             -march=*)             ;;
2701             -lz)                  echo zlib.lib ;;
2702             -lavifil32)           echo vfw32.lib ;;
2703             -lavicap32)           echo vfw32.lib user32.lib ;;
2704             -l*)                  echo ${flag#-l}.lib ;;
2705             *)                    echo $flag ;;
2706         esac
2707     done
2708 }
2709
2710 msvc_flags(){
2711     msvc_common_flags "$@"
2712     for flag; do
2713         case $flag in
2714             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
2715                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
2716                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
2717                                        -wd4273 -wd4701 ;;
2718         esac
2719     done
2720 }
2721
2722 icl_flags(){
2723     msvc_common_flags "$@"
2724     for flag; do
2725         case $flag in
2726             # Despite what Intel's documentation says -Wall, which is supported
2727             # on Windows, does enable remarks so disable them here.
2728             -Wall)                echo $flag -Qdiag-disable:remark ;;
2729             -std=c99)             echo -Qstd=c99 ;;
2730         esac
2731     done
2732 }
2733
2734 pgi_flags(){
2735     for flag; do
2736         case $flag in
2737             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
2738             -fomit-frame-pointer) echo -Mnoframe ;;
2739             -g)                   echo -gopt ;;
2740             *)                    echo $flag ;;
2741         esac
2742     done
2743 }
2744
2745 suncc_flags(){
2746     for flag; do
2747         case $flag in
2748             -march=*|-mcpu=*)
2749                 case "${flag#*=}" in
2750                     native)                   echo -xtarget=native       ;;
2751                     v9|niagara)               echo -xarch=sparc          ;;
2752                     ultrasparc)               echo -xarch=sparcvis       ;;
2753                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
2754                     i586|pentium)             echo -xchip=pentium        ;;
2755                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
2756                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
2757                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
2758                     pentium4*)          echo -xtarget=pentium4           ;;
2759                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
2760                     *-sse3)             echo -xarch=sse3                 ;;
2761                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
2762                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
2763                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
2764                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
2765                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
2766                     k8|opteron|athlon64|athlon-fx)
2767                                                echo -xarch=sse2a         ;;
2768                     athlon*)                   echo -xarch=pentium_proa  ;;
2769                 esac
2770                 ;;
2771             -std=c99)             echo -xc99              ;;
2772             -fomit-frame-pointer) echo -xregs=frameptr    ;;
2773             -fPIC)                echo -KPIC -xcode=pic32 ;;
2774             -W*,*)                echo $flag              ;;
2775             -f*-*|-W*|-mimpure-text)                      ;;
2776             -shared)              echo -G                 ;;
2777             *)                    echo $flag              ;;
2778         esac
2779     done
2780 }
2781
2782 tms470_flags(){
2783     for flag; do
2784         case $flag in
2785             -march=*|-mcpu=*)
2786                 case "${flag#*=}" in
2787                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
2788                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
2789                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
2790                     armv6*|arm11*)          echo -mv=6   ;;
2791                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
2792                                             echo -mv=5e  ;;
2793                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
2794                 esac
2795                 ;;
2796             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
2797             -mfpu=vfp)      echo --float_support=vfpv2        ;;
2798             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
2799             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
2800             -msoft-float)   echo --float_support=vfplib       ;;
2801             -O[0-3]|-mf=*)  echo $flag                        ;;
2802             -g)             echo -g -mn                       ;;
2803             -pds=*)         echo $flag                        ;;
2804             -D*|-I*)        echo $flag                        ;;
2805             --gcc|--abi=*)  echo $flag                        ;;
2806             -me)            echo $flag                        ;;
2807         esac
2808     done
2809 }
2810
2811 probe_cc(){
2812     pfx=$1
2813     _cc=$2
2814
2815     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
2816     unset _ld_o _ldflags _ld_lib _ld_path
2817     unset _depflags _DEPCMD _DEPFLAGS
2818     _flags_filter=echo
2819
2820     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
2821         _type=llvm_gcc
2822         gcc_extra_ver=$(expr "$($_cc --version | head -n1)" : '.*\((.*)\)')
2823         _ident="llvm-gcc $($_cc -dumpversion) $gcc_extra_ver"
2824         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2825         _cflags_speed='-O3'
2826         _cflags_size='-Os'
2827     elif $_cc -v 2>&1 | grep -qi ^gcc; then
2828         _type=gcc
2829         gcc_version=$($_cc --version | head -n1)
2830         gcc_basever=$($_cc -dumpversion)
2831         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
2832         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
2833         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
2834         if ! $_cc -dumpversion | grep -q '^2\.'; then
2835             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2836         fi
2837         _cflags_speed='-O3'
2838         _cflags_size='-Os'
2839     elif $_cc --version 2>/dev/null | grep -q ^icc; then
2840         _type=icc
2841         _ident=$($_cc --version | head -n1)
2842         _depflags='-MMD'
2843         _cflags_speed='-O3'
2844         _cflags_size='-Os'
2845         _cflags_noopt='-O1'
2846     elif $_cc -v 2>&1 | grep -q xlc; then
2847         _type=xlc
2848         _ident=$($_cc -qversion 2>/dev/null | head -n1)
2849         _cflags_speed='-O5'
2850         _cflags_size='-O5 -qcompact'
2851     elif $_cc -V 2>/dev/null | grep -q Compaq; then
2852         _type=ccc
2853         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
2854         _DEPFLAGS='-M'
2855         _cflags_speed='-fast'
2856         _cflags_size='-O1'
2857         _flags_filter=ccc_flags
2858     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
2859         test -d "$sysroot" || die "No valid sysroot specified."
2860         _type=armcc
2861         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
2862         armcc_conf="$PWD/armcc.conf"
2863         $_cc --arm_linux_configure                 \
2864              --arm_linux_config_file="$armcc_conf" \
2865              --configure_sysroot="$sysroot"        \
2866              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
2867              die "Error creating armcc configuration file."
2868         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
2869         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
2870         as_default="${cross_prefix}gcc"
2871         _depflags='-MMD'
2872         _cflags_speed='-O3'
2873         _cflags_size='-Os'
2874     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
2875         _type=tms470
2876         _ident=$($_cc -version | head -n1 | tr -s ' ')
2877         _flags='--gcc --abi=eabi -me'
2878         _cc_e='-ppl -fe=$@'
2879         _cc_o='-fe=$@'
2880         _depflags='-ppa -ppd=$(@:.o=.d)'
2881         _cflags_speed='-O3 -mf=5'
2882         _cflags_size='-O3 -mf=2'
2883         _flags_filter=tms470_flags
2884     elif $_cc -v 2>&1 | grep -q clang; then
2885         _type=clang
2886         _ident=$($_cc --version | head -n1)
2887         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2888         _cflags_speed='-O3'
2889         _cflags_size='-Os'
2890     elif $_cc -V 2>&1 | grep -q Sun; then
2891         _type=suncc
2892         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
2893         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
2894         _DEPFLAGS='-xM1 -xc99'
2895         _ldflags='-std=c99'
2896         _cflags_speed='-O5'
2897         _cflags_size='-O5 -xspace'
2898         _flags_filter=suncc_flags
2899     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
2900         _type=pathscale
2901         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
2902         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2903         _cflags_speed='-O2'
2904         _cflags_size='-Os'
2905         _flags_filter='filter_out -Wdisabled-optimization'
2906     elif $_cc -v 2>&1 | grep -q Open64; then
2907         _type=open64
2908         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
2909         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2910         _cflags_speed='-O2'
2911         _cflags_size='-Os'
2912         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
2913     elif $_cc -V 2>&1 | grep -q Portland; then
2914         _type=pgi
2915         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
2916         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
2917         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
2918         _cflags_size="-O2 -Munroll=c:1 $opt_common"
2919         _cflags_noopt="-O1"
2920         _flags_filter=pgi_flags
2921     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
2922         _type=armasm
2923         _ident=$($_cc | head -n1)
2924         # 4509: "This form of conditional instruction is deprecated"
2925         _flags="-nologo -ignore 4509"
2926         _flags_filter=armasm_flags
2927     elif $_cc 2>&1 | grep -q Microsoft; then
2928         _type=msvc
2929         _ident=$($cc 2>&1 | head -n1)
2930         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
2931         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
2932         _cflags_speed="-O2"
2933         _cflags_size="-O1"
2934         if $_cc 2>&1 | grep -q Linker; then
2935             _ld_o='-out:$@'
2936         else
2937             _ld_o='-Fe$@'
2938         fi
2939         _cc_o='-Fo$@'
2940         _cc_e='-P -Fi$@'
2941         _flags_filter=msvc_flags
2942         _ld_lib='lib%.a'
2943         _ld_path='-libpath:'
2944         _flags='-nologo'
2945         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -Dinline=__inline -FIstdlib.h -Dstrtoll=_strtoi64'
2946         if [ $pfx = hostcc ]; then
2947             append _cflags -Dsnprintf=_snprintf
2948         fi
2949     elif $_cc 2>&1 | grep -q Intel; then
2950         _type=icl
2951         _ident=$($cc 2>&1 | head -n1)
2952         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
2953         # Not only is O3 broken on 13.x+ but it is slower on all previous
2954         # versions (tested) as well.
2955         _cflags_speed="-O2"
2956         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
2957         if $_cc 2>&1 | grep -q Linker; then
2958             _ld_o='-out:$@'
2959         else
2960             _ld_o='-Fe$@'
2961         fi
2962         _cc_o='-Fo$@'
2963         _cc_e='-P'
2964         _flags_filter=icl_flags
2965         _ld_lib='lib%.a'
2966         _ld_path='-libpath:'
2967         # -Qdiag-error to make icl error when seeing certain unknown arguments
2968         _flags='-nologo -Qdiag-error:4044,10157'
2969         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
2970         # with MSVC which enables it by default.
2971         _cflags='-D_USE_MATH_DEFINES -FIstdlib.h -Dstrtoll=_strtoi64 -Qms0 -Qvec- -Qsimd- -GS'
2972         if [ $pfx = hostcc ]; then
2973             append _cflags -Dsnprintf=_snprintf
2974         fi
2975     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
2976         _type=cparser
2977         _ident=$($_cc --version | head -n1)
2978         _depflags='-MMD'
2979         _cflags_speed='-O4'
2980         _cflags_size='-O2'
2981         _flags_filter=cparser_flags
2982     fi
2983
2984     eval ${pfx}_type=\$_type
2985     eval ${pfx}_ident=\$_ident
2986 }
2987
2988 set_ccvars(){
2989     eval ${1}_C=\${_cc_c-\${${1}_C}}
2990     eval ${1}_E=\${_cc_e-\${${1}_E}}
2991     eval ${1}_O=\${_cc_o-\${${1}_O}}
2992
2993     if [ -n "$_depflags" ]; then
2994         eval ${1}_DEPFLAGS=\$_depflags
2995     else
2996         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
2997         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
2998         eval DEP${1}FLAGS=\$_flags
2999     fi
3000 }
3001
3002 probe_cc cc "$cc"
3003 cflags_filter=$_flags_filter
3004 cflags_speed=$_cflags_speed
3005 cflags_size=$_cflags_size
3006 cflags_noopt=$_cflags_noopt
3007 add_cflags $_flags $_cflags
3008 cc_ldflags=$_ldflags
3009 set_ccvars CC
3010
3011 probe_cc hostcc "$host_cc"
3012 host_cflags_filter=$_flags_filter
3013 add_host_cflags  $_flags $_cflags
3014 set_ccvars HOSTCC
3015
3016 test -n "$cc_type" && enable $cc_type ||
3017     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3018
3019 : ${as_default:=$cc}
3020 : ${dep_cc_default:=$cc}
3021 : ${ld_default:=$cc}
3022 : ${host_ld_default:=$host_cc}
3023 set_default ar as dep_cc ld host_ld
3024
3025 probe_cc as "$as"
3026 asflags_filter=$_flags_filter
3027 add_asflags $_flags $_cflags
3028 set_ccvars AS
3029
3030 probe_cc ld "$ld"
3031 ldflags_filter=$_flags_filter
3032 add_ldflags $_flags $_ldflags
3033 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3034 LD_O=${_ld_o-$LD_O}
3035 LD_LIB=${_ld_lib-$LD_LIB}
3036 LD_PATH=${_ld_path-$LD_PATH}
3037
3038 probe_cc hostld "$host_ld"
3039 host_ldflags_filter=$_flags_filter
3040 add_host_ldflags $_flags $_ldflags
3041 HOSTLD_O=${_ld_o-$HOSTLD_O}
3042
3043 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3044     probe_cc depcc "$dep_cc"
3045     CCDEP=${_DEPCMD:-$DEPCMD}
3046     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3047     DEPCCFLAGS=$_flags
3048 fi
3049
3050 if $ar 2>&1 | grep -q Microsoft; then
3051     arflags="-nologo"
3052     ar_o='-out:$@'
3053 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3054     arflags="rq"
3055     ar_o='$@'
3056 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3057     arflags='-Xany -r -c'
3058     ar_o='$@'
3059 else
3060     arflags="rc"
3061     ar_o='$@'
3062 fi
3063
3064 add_cflags $extra_cflags
3065 add_asflags $extra_cflags
3066
3067 if test -n "$sysroot"; then
3068     case "$cc_type" in
3069         gcc|llvm_gcc|clang)
3070             add_cppflags --sysroot="$sysroot"
3071             add_ldflags --sysroot="$sysroot"
3072         ;;
3073         tms470)
3074             add_cppflags -I"$sysinclude"
3075             add_ldflags  --sysroot="$sysroot"
3076         ;;
3077     esac
3078 fi
3079
3080 if test "$cpu" = host; then
3081     enabled cross_compile &&
3082         die "--cpu=host makes no sense when cross-compiling."
3083
3084     case "$cc_type" in
3085         gcc|llvm_gcc)
3086             check_native(){
3087                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3088                 sed -n "/cc1.*$1=/{
3089                             s/.*$1=\\([^ ]*\\).*/\\1/
3090                             p
3091                             q
3092                         }" $TMPE
3093             }
3094             cpu=$(check_native -march || check_native -mcpu)
3095         ;;
3096     esac
3097
3098     test "${cpu:-host}" = host &&
3099         die "--cpu=host not supported with compiler $cc"
3100 fi
3101
3102 # Deal with common $arch aliases
3103 case "$arch" in
3104     aarch64|arm64)
3105         arch="aarch64"
3106     ;;
3107     arm*)
3108         arch="arm"
3109     ;;
3110     mips*|IP*)
3111         arch="mips"
3112     ;;
3113     parisc*|hppa*)
3114         arch="parisc"
3115     ;;
3116     "Power Macintosh"|ppc*|powerpc*)
3117         arch="ppc"
3118     ;;
3119     s390|s390x)
3120         arch="s390"
3121     ;;
3122     sh4|sh)
3123         arch="sh4"
3124     ;;
3125     sun4u|sparc*)
3126         arch="sparc"
3127     ;;
3128     tilegx|tile-gx)
3129         arch="tilegx"
3130     ;;
3131     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3132         arch="x86"
3133     ;;
3134 esac
3135
3136 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3137 enable $arch
3138
3139 # Add processor-specific flags
3140 if enabled aarch64; then
3141
3142     case $cpu in
3143         armv*)
3144             cpuflags="-march=$cpu"
3145         ;;
3146         *)
3147             cpuflags="-mcpu=$cpu"
3148         ;;
3149     esac
3150
3151 elif enabled alpha; then
3152
3153     cpuflags="-mcpu=$cpu"
3154
3155 elif enabled arm; then
3156
3157     check_arm_arch() {
3158         check_cpp_condition stddef.h \
3159             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3160             $cpuflags
3161     }
3162
3163     probe_arm_arch() {
3164         if   check_arm_arch 4;        then echo armv4;
3165         elif check_arm_arch 4T;       then echo armv4t;
3166         elif check_arm_arch 5;        then echo armv5;
3167         elif check_arm_arch 5E;       then echo armv5e;
3168         elif check_arm_arch 5T;       then echo armv5t;
3169         elif check_arm_arch 5TE;      then echo armv5te;
3170         elif check_arm_arch 5TEJ;     then echo armv5te;
3171         elif check_arm_arch 6;        then echo armv6;
3172         elif check_arm_arch 6J;       then echo armv6j;
3173         elif check_arm_arch 6K;       then echo armv6k;
3174         elif check_arm_arch 6Z;       then echo armv6z;
3175         elif check_arm_arch 6ZK;      then echo armv6zk;
3176         elif check_arm_arch 6T2;      then echo armv6t2;
3177         elif check_arm_arch 7;        then echo armv7;
3178         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3179         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3180         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3181         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3182         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3183         fi
3184     }
3185
3186     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3187
3188     case $cpu in
3189         armv*)
3190             cpuflags="-march=$cpu"
3191             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3192         ;;
3193         *)
3194             cpuflags="-mcpu=$cpu"
3195             case $cpu in
3196                 cortex-a*)                               subarch=armv7a  ;;
3197                 cortex-r*)                               subarch=armv7r  ;;
3198                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3199                 arm11*)                                  subarch=armv6   ;;
3200                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3201                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3202                 *)                             subarch=$(probe_arm_arch) ;;
3203             esac
3204         ;;
3205     esac
3206
3207     case "$subarch" in
3208         armv5t*)    enable fast_clz                ;;
3209         armv[6-8]*) enable fast_clz fast_unaligned ;;
3210     esac
3211
3212 elif enabled avr32; then
3213
3214     case $cpu in
3215         ap7[02]0[0-2])
3216             subarch="avr32_ap"
3217             cpuflags="-mpart=$cpu"
3218         ;;
3219         ap)
3220             subarch="avr32_ap"
3221             cpuflags="-march=$cpu"
3222         ;;
3223         uc3[ab]*)
3224             subarch="avr32_uc"
3225             cpuflags="-mcpu=$cpu"
3226         ;;
3227         uc)
3228             subarch="avr32_uc"
3229             cpuflags="-march=$cpu"
3230         ;;
3231     esac
3232
3233 elif enabled bfin; then
3234
3235     cpuflags="-mcpu=$cpu"
3236
3237 elif enabled mips; then
3238
3239     cpuflags="-march=$cpu"
3240
3241 elif enabled ppc; then
3242
3243     disable ldbrx
3244
3245     case $(tolower $cpu) in
3246         601|ppc601|powerpc601)
3247             cpuflags="-mcpu=601"
3248             disable altivec
3249         ;;
3250         603*|ppc603*|powerpc603*)
3251             cpuflags="-mcpu=603"
3252             disable altivec
3253         ;;
3254         604*|ppc604*|powerpc604*)
3255             cpuflags="-mcpu=604"
3256             disable altivec
3257         ;;
3258         g3|75*|ppc75*|powerpc75*)
3259             cpuflags="-mcpu=750"
3260             disable altivec
3261         ;;
3262         g4|745*|ppc745*|powerpc745*)
3263             cpuflags="-mcpu=7450"
3264         ;;
3265         74*|ppc74*|powerpc74*)
3266             cpuflags="-mcpu=7400"
3267         ;;
3268         g5|970|ppc970|powerpc970)
3269             cpuflags="-mcpu=970"
3270         ;;
3271         power[3-7]*)
3272             cpuflags="-mcpu=$cpu"
3273         ;;
3274         cell)
3275             cpuflags="-mcpu=cell"
3276             enable ldbrx
3277         ;;
3278         e500mc)
3279             cpuflags="-mcpu=e500mc"
3280             disable altivec
3281         ;;
3282         e500v2)
3283             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3284             disable altivec
3285             disable dcbzl
3286         ;;
3287         e500)
3288             cpuflags="-mcpu=8540 -mhard-float"
3289             disable altivec
3290             disable dcbzl
3291         ;;
3292     esac
3293
3294 elif enabled sparc; then
3295
3296     case $cpu in
3297         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3298             cpuflags="-mcpu=$cpu"
3299         ;;
3300         ultrasparc*|niagara[234])
3301             cpuflags="-mcpu=$cpu"
3302         ;;
3303     esac
3304
3305 elif enabled x86; then
3306
3307     case $cpu in
3308         i[345]86|pentium)
3309             cpuflags="-march=$cpu"
3310             disable i686
3311             disable mmx
3312         ;;
3313         # targets that do NOT support nopl and conditional mov (cmov)
3314         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3315             cpuflags="-march=$cpu"
3316             disable i686
3317         ;;
3318         # targets that do support nopl and conditional mov (cmov)
3319         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3320             cpuflags="-march=$cpu"
3321             enable i686
3322             enable fast_cmov
3323         ;;
3324         # targets that do support conditional mov but on which it's slow
3325         pentium4|pentium4m|prescott|nocona)
3326             cpuflags="-march=$cpu"
3327             enable i686
3328             disable fast_cmov
3329         ;;
3330     esac
3331
3332 fi
3333
3334 if [ "$cpu" != generic ]; then
3335     add_cflags  $cpuflags
3336     add_asflags $cpuflags
3337 fi
3338
3339 # compiler sanity check
3340 check_exec <<EOF
3341 int main(void){ return 0; }
3342 EOF
3343 if test "$?" != 0; then
3344     echo "$cc is unable to create an executable file."
3345     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3346         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3347         echo "Only do this if you know what cross compiling means."
3348     fi
3349     die "C compiler test failed."
3350 fi
3351
3352 add_cppflags -D_ISOC99_SOURCE
3353 check_cflags -std=c99
3354 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3355 #include <stdlib.h>
3356 EOF
3357 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3358 #include <stdlib.h>
3359 EOF
3360
3361 add_host_cppflags -D_ISOC99_SOURCE
3362 check_host_cflags -std=c99
3363 check_host_cflags -Wall
3364 check_host_cflags -O3
3365
3366 check_64bit(){
3367     arch32=$1
3368     arch64=$2
3369     expr=$3
3370     check_code cc "" "int test[2*($expr) - 1]" &&
3371         subarch=$arch64 || subarch=$arch32
3372 }
3373
3374 case "$arch" in
3375     aarch64|alpha|ia64)
3376         spic=$shared
3377     ;;
3378     mips)
3379         check_64bit mips mips64 '_MIPS_SIM > 1'
3380         spic=$shared
3381     ;;
3382     parisc)
3383         check_64bit parisc parisc64 'sizeof(void *) > 4'
3384         spic=$shared
3385     ;;
3386     ppc)
3387         check_64bit ppc ppc64 'sizeof(void *) > 4'
3388         spic=$shared
3389     ;;
3390     s390)
3391         check_64bit s390 s390x 'sizeof(void *) > 4'
3392         spic=$shared
3393     ;;
3394     sparc)
3395         check_64bit sparc sparc64 'sizeof(void *) > 4'
3396         spic=$shared
3397     ;;
3398     x86)
3399         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3400         if test "$subarch" = "x86_64"; then
3401             spic=$shared
3402         fi
3403     ;;
3404 esac
3405
3406 enable $subarch
3407 enabled spic && enable_weak pic
3408
3409 # OS specific
3410 case $target_os in
3411     aix)
3412         SHFLAGS=-shared
3413         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3414         enabled shared && add_ldflags -Wl,-brtl
3415         ;;
3416     android)
3417         disable symver
3418         SLIB_INSTALL_NAME='$(SLIBNAME)'
3419         SLIB_INSTALL_LINKS=
3420         # soname not set on purpose
3421         SHFLAGS=-shared
3422         ;;
3423     haiku)
3424         prefix_default="/boot/common"
3425         network_extralibs="-lnetwork"
3426         host_libs=
3427         ;;
3428     sunos)
3429         SHFLAGS='-shared -Wl,-h,$$(@F)'
3430         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3431         network_extralibs="-lsocket -lnsl"
3432         # When using suncc to build, the Solaris linker will mark
3433         # an executable with each instruction set encountered by
3434         # the Solaris assembler.  As our libraries contain their own
3435         # guards for processor-specific code, instead suppress
3436         # generation of the HWCAPS ELF section on Solaris x86 only.
3437         enabled_all suncc x86 &&
3438             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3439             add_ldflags -Wl,-M,mapfile
3440         nm_default='nm -P -g'
3441         ;;
3442     netbsd)
3443         disable symver
3444         oss_indev_extralibs="-lossaudio"
3445         oss_outdev_extralibs="-lossaudio"
3446         ;;
3447     openbsd|bitrig)
3448         disable symver
3449         SHFLAGS='-shared'
3450         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3451         SLIB_INSTALL_LINKS=
3452         oss_indev_extralibs="-lossaudio"
3453         oss_outdev_extralibs="-lossaudio"
3454         ;;
3455     dragonfly)
3456         disable symver
3457         ;;
3458     freebsd)
3459         ;;
3460     bsd/os)
3461         add_extralibs -lpoll -lgnugetopt
3462         ;;
3463     darwin)
3464         enabled ppc && add_asflags -force_cpusubtype_ALL
3465         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3466         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3467         add_ldflags -Wl,-dynamic,-search_paths_first
3468         SLIBSUF=".dylib"
3469         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3470         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3471         objformat="macho"
3472         enabled x86_64 && objformat="macho64"
3473         enabled_any pic shared ||
3474             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3475         ;;
3476     mingw32*)
3477         if test $target_os = "mingw32ce"; then
3478             disable network
3479         else
3480             target_os=mingw32
3481         fi
3482         LIBTARGET=i386
3483         if enabled x86_64; then
3484             LIBTARGET="i386:x86-64"
3485         elif enabled arm; then
3486             LIBTARGET=arm-wince
3487         fi
3488         check_ldflags -Wl,--nxcompat
3489         check_ldflags -Wl,--dynamicbase
3490         shlibdir_default="$bindir_default"
3491         SLIBPREF=""
3492         SLIBSUF=".dll"
3493         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3494         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3495         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3496         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3497         SLIB_INSTALL_LINKS=
3498         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3499         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3500         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3501         objformat="win32"
3502         dlltool="${cross_prefix}dlltool"
3503         ranlib=:
3504         enable dos_paths
3505         ;;
3506     win32|win64)
3507         disable symver
3508         if enabled shared; then
3509             # Link to the import library instead of the normal static library
3510             # for shared libs.
3511             LD_LIB='%.lib'
3512             # Cannot build both shared and static libs with MSVC or icl.
3513             disable static
3514         fi
3515         shlibdir_default="$bindir_default"
3516         SLIBPREF=""
3517         SLIBSUF=".dll"
3518         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3519         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3520         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3521         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3522         SLIB_INSTALL_LINKS=
3523         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3524         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3525         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3526         objformat="win32"
3527         ranlib=:
3528         enable dos_paths
3529         ;;
3530     cygwin*)
3531         target_os=cygwin
3532         shlibdir_default="$bindir_default"
3533         SLIBPREF="cyg"
3534         SLIBSUF=".dll"
3535         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3536         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3537         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3538         SLIB_INSTALL_LINKS=
3539         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3540         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3541         objformat="win32"
3542         enable dos_paths
3543         ;;
3544     *-dos|freedos|opendos)
3545         network_extralibs="-lsocket"
3546         objformat="coff"
3547         enable dos_paths
3548         add_cppflags -U__STRICT_ANSI__
3549         ;;
3550     linux)
3551         enable dv1394
3552         ;;
3553     irix*)
3554         target_os=irix
3555         ranlib="echo ignoring ranlib"
3556         ;;
3557     os/2*)
3558         ln_s="cp -f"
3559         objformat="aout"
3560         add_cppflags -D_GNU_SOURCE
3561         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3562         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3563         LIBSUF="_s.a"
3564         SLIBPREF=""
3565         SLIBSUF=".dll"
3566         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3567         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3568         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3569             echo PROTMODE >> $(SUBDIR)$(NAME).def; \
3570             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3571             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3572             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3573             emxexp -o $(OBJS) >> $(SUBDIR)$(NAME).def'
3574         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3575             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3576         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3577         enable dos_paths
3578         ;;
3579     gnu/kfreebsd)
3580         add_cppflags -D_BSD_SOURCE
3581         ;;
3582     gnu)
3583         ;;
3584     qnx)
3585         add_cppflags -D_QNX_SOURCE
3586         network_extralibs="-lsocket"
3587         ;;
3588     symbian)
3589         SLIBSUF=".dll"
3590         enable dos_paths
3591         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3592         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3593         add_ldflags -Wl,--target1-abs,--no-undefined \
3594                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3595                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3596         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3597                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3598                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3599         ;;
3600     osf1)
3601         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3602         ;;
3603     minix)
3604         ;;
3605     plan9)
3606         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3607                      -D_REENTRANT_SOURCE        \
3608                      -D_RESEARCH_SOURCE         \
3609                      -DFD_SETSIZE=96            \
3610                      -DHAVE_SOCK_OPTS
3611         add_compat strtod.o strtod=avpriv_strtod
3612         network_extralibs='-lbsd'
3613         exeobjs=compat/plan9/main.o
3614         cp_f='cp'
3615         ;;
3616     none)
3617         ;;
3618     *)
3619         die "Unknown OS '$target_os'."
3620         ;;
3621 esac
3622
3623 # determine libc flavour
3624
3625 probe_libc(){
3626     pfx=$1
3627     pfx_no_=${pfx%_}
3628     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3629     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3630         eval ${pfx}libc_type=uclibc
3631         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3632     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3633         eval ${pfx}libc_type=glibc
3634         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3635     # MinGW headers can be installed on Cygwin, so check for newlib first.
3636     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3637         eval ${pfx}libc_type=newlib
3638         add_${pfx}cppflags -U__STRICT_ANSI__
3639     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3640     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3641         eval ${pfx}libc_type=mingw64
3642         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3643         eval test \$${pfx_no_}cc_type = "gcc" &&
3644             add_${pfx}cppflags -D__printf__=__gnu_printf__
3645     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3646          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3647         eval ${pfx}libc_type=mingw32
3648         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3649             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3650             die "ERROR: MinGW32 runtime version must be >= 3.15."
3651         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3652         eval test \$${pfx_no_}cc_type = "gcc" &&
3653             add_${pfx}cppflags -D__printf__=__gnu_printf__
3654     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3655         eval ${pfx}libc_type=msvcrt
3656         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3657         # 0x601 by default unless something else is set by the user.
3658         # This can easily lead to us detecting functions only present
3659         # in such new versions and producing binaries requiring windows 7.0.
3660         # Therefore explicitly set the default to XP unless the user has
3661         # set something else on the command line.
3662         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
3663             add_${pfx}cppflags -D_WIN32_WINNT=0x0502
3664     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
3665         eval ${pfx}libc_type=klibc
3666     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
3667         eval ${pfx}libc_type=bionic
3668     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
3669         eval ${pfx}libc_type=solaris
3670         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
3671     else
3672         eval ${pfx}libc_type=default
3673         add_${pfx}cppflags -D_DEFAULT_SOURCE
3674     fi
3675 }
3676
3677 probe_libc
3678 test -n "$libc_type" && enable libc_$libc_type
3679 probe_libc host_
3680 test -n "$host_libc_type" && enable host_libc_$host_libc_type
3681
3682 case $libc_type in
3683     bionic)
3684         add_compat strtod.o strtod=avpriv_strtod
3685         ;;
3686     msvcrt)
3687         add_compat strtod.o strtod=avpriv_strtod
3688         add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3689                                      _snprintf=avpriv_snprintf  \
3690                                      vsnprintf=avpriv_vsnprintf
3691         ;;
3692 esac
3693
3694 # hacks for compiler/libc/os combinations
3695
3696 if enabled_all tms470 libc_glibc; then
3697     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
3698     add_cppflags -D__USER_LABEL_PREFIX__=
3699     add_cppflags -D__builtin_memset=memset
3700     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
3701     add_cflags   -pds=48    # incompatible redefinition of macro
3702 fi
3703
3704 if enabled_all ccc libc_glibc; then
3705     add_ldflags -Wl,-z,now  # calls to libots crash without this
3706 fi
3707
3708 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
3709     add_cppflags '-I\$(SRC_PATH)/compat/float'
3710
3711 esc(){
3712     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
3713 }
3714
3715 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
3716
3717 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
3718
3719 set_default $PATHS_LIST
3720 set_default nm
3721
3722 # we need to build at least one lib type
3723 if ! enabled_any static shared; then
3724     cat <<EOF
3725 At least one library type must be built.
3726 Specify --enable-static to build the static libraries or --enable-shared to
3727 build the shared libraries as well. To only build the shared libraries specify
3728 --disable-static in addition to --enable-shared.
3729 EOF
3730     exit 1;
3731 fi
3732
3733 die_license_disabled() {
3734     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
3735 }
3736
3737 die_license_disabled gpl libcdio
3738 die_license_disabled gpl libx264
3739 die_license_disabled gpl libx265
3740 die_license_disabled gpl libxavs
3741 die_license_disabled gpl libxvid
3742 die_license_disabled gpl x11grab
3743
3744 die_license_disabled nonfree libfaac
3745 die_license_disabled nonfree libfdk_aac
3746 die_license_disabled nonfree openssl
3747
3748 die_license_disabled version3 libopencore_amrnb
3749 die_license_disabled version3 libopencore_amrwb
3750 die_license_disabled version3 libvo_aacenc
3751 die_license_disabled version3 libvo_amrwbenc
3752
3753 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
3754
3755 disabled optimizations || check_cflags -fomit-frame-pointer
3756
3757 enable_weak_pic() {
3758     disabled pic && return
3759     enable pic
3760     add_cppflags -DPIC
3761     case "$target_os" in
3762     mingw*|cygwin*)
3763         ;;
3764     *)
3765         add_cflags -fPIC
3766         ;;
3767     esac
3768     add_asflags  -fPIC
3769 }
3770
3771 enabled pic && enable_weak_pic
3772
3773 check_cc <<EOF || die "Symbol mangling check failed."
3774 int ff_extern;
3775 EOF
3776 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
3777 extern_prefix=${sym%%ff_extern*}
3778
3779 check_cc <<EOF && enable_weak inline_asm
3780 void foo(void) { __asm__ volatile ("" ::); }
3781 EOF
3782
3783 _restrict=
3784 for restrict_keyword in restrict __restrict__ __restrict; do
3785     check_cc <<EOF && _restrict=$restrict_keyword && break
3786 void foo(char * $restrict_keyword p);
3787 EOF
3788 done
3789
3790 check_cc <<EOF && enable pragma_deprecated
3791 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
3792 EOF
3793
3794 check_cc <<EOF && enable attribute_packed
3795 struct { int x; } __attribute__((packed)) x;
3796 EOF
3797
3798 check_cc <<EOF && enable attribute_may_alias
3799 union { int x; } __attribute__((may_alias)) x;
3800 EOF
3801
3802 check_cc <<EOF || die "endian test failed"
3803 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
3804 EOF
3805 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
3806
3807 check_gas() {
3808     log "check_gas using '$as' as AS"
3809     # :vararg is used on aarch64, arm and ppc altivec
3810     check_as <<EOF || return 1
3811 .macro m n, y:vararg=0
3812 \n: .int \y
3813 .endm
3814 m x
3815 EOF
3816     # .altmacro is only used in arm asm
3817     ! enabled arm || check_as <<EOF || return 1
3818 .altmacro
3819 EOF
3820     enable gnu_as
3821     return 0
3822 }
3823
3824 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
3825     nogas=:
3826     enabled_any arm aarch64 && nogas=die
3827     enabled_all ppc altivec && nogas=warn
3828     as_noop=-v
3829
3830     case $as_type in
3831         arm*) gaspp_as_type=armasm; as_noop=-h ;;
3832         gcc)  gaspp_as_type=gas ;;
3833         *)    gaspp_as_type=$as_type ;;
3834     esac
3835
3836     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
3837
3838     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
3839         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
3840
3841     if ! check_gas ; then
3842         as=${gas:=$as}
3843         check_gas || \
3844             $nogas "GNU assembler not found, install/update gas-preprocessor"
3845     fi
3846
3847     check_as <<EOF && enable as_func
3848 .func test
3849 .endfunc
3850 EOF
3851 fi
3852
3853 check_inline_asm inline_asm_labels '"1:\n"'
3854
3855 if enabled aarch64; then
3856     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
3857     # internal assembler in clang 3.3 does not support this instruction
3858     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
3859     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
3860
3861     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
3862
3863 elif enabled alpha; then
3864
3865     check_cflags -mieee
3866
3867 elif enabled arm; then
3868
3869     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
3870     enabled thumb && check_cflags -mthumb || check_cflags -marm
3871
3872     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
3873         enable vfp_args
3874     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__"; then
3875         case "${cross_prefix:-$cc}" in
3876             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
3877             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
3878 __asm__ (".eabi_attribute 28, 1");
3879 int main(void) { return 0; }
3880 EOF
3881         esac
3882         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
3883     fi
3884
3885     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
3886     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
3887     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
3888     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
3889     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
3890     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
3891
3892     [ $target_os = linux ] || [ $target_os = android ] ||
3893         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
3894             $ARCH_EXT_LIST_ARM
3895
3896     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
3897
3898     check_as <<EOF && enable as_dn_directive
3899 ra .dn d0.i16
3900 .unreq ra
3901 EOF
3902
3903     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
3904
3905 elif enabled mips; then
3906
3907     check_inline_asm loongson '"dmult.g $1, $2, $3"'
3908
3909 elif enabled parisc; then
3910
3911     if enabled gcc; then
3912         case $($cc -dumpversion) in
3913             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
3914         esac
3915     fi
3916
3917 elif enabled ppc; then
3918
3919     enable local_aligned_8 local_aligned_16
3920
3921     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
3922     check_inline_asm ibm_asm   '"add 0, 0, 0"'
3923     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
3924     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
3925
3926     # AltiVec flags: The FSF version of GCC differs from the Apple version
3927     if enabled altivec; then
3928         check_cflags -maltivec -mabi=altivec &&
3929         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
3930         check_cflags -faltivec
3931
3932         # check if our compiler supports Motorola AltiVec C API
3933         check_cc <<EOF || disable altivec
3934 $inc_altivec_h
3935 int main(void) {
3936     vector signed int v1 = (vector signed int) { 0 };
3937     vector signed int v2 = (vector signed int) { 1 };
3938     v1 = vec_add(v1, v2);
3939     return 0;
3940 }
3941 EOF
3942
3943         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
3944     fi
3945
3946 elif enabled x86; then
3947
3948     check_builtin rdtsc    intrin.h   "__rdtsc()"
3949     check_builtin mm_empty mmintrin.h "_mm_empty()"
3950
3951     enable local_aligned_8 local_aligned_16
3952
3953     # check whether EBP is available on x86
3954     # As 'i' is stored on the stack, this program will crash
3955     # if the base pointer is used to access it because the
3956     # base pointer is cleared in the inline assembly code.
3957     check_exec_crash <<EOF && enable ebp_available
3958 volatile int i=0;
3959 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
3960 return i;
3961 EOF
3962
3963     # check whether EBX is available on x86
3964     check_inline_asm ebx_available '""::"b"(0)' &&
3965         check_inline_asm ebx_available '"":::"%ebx"'
3966
3967     # check whether xmm clobbers are supported
3968     check_inline_asm xmm_clobbers '"":::"%xmm0"'
3969
3970     # check whether binutils is new enough to compile SSSE3/MMXEXT
3971     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
3972     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
3973
3974     if ! disabled_any asm mmx yasm; then
3975         if check_cmd $yasmexe --version; then
3976             enabled x86_64 && yasm_extra="-m amd64"
3977             yasm_debug="-g dwarf2"
3978         elif check_cmd nasm -v; then
3979             yasmexe=nasm
3980             yasm_debug="-g -F dwarf"
3981             enabled x86_64 && test "$objformat" = elf && objformat=elf64
3982         fi
3983
3984         YASMFLAGS="-f $objformat $yasm_extra"
3985         enabled pic               && append YASMFLAGS "-DPIC"
3986         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
3987         case "$objformat" in
3988             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
3989         esac
3990
3991         check_yasm "movbe ecx, [5]" && enable yasm ||
3992             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
3993         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
3994         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
3995         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
3996         check_yasm "CPU amdnop" || disable cpunop
3997     fi
3998
3999     case "$cpu" in
4000         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4001             disable fast_clz
4002         ;;
4003     esac
4004
4005 fi
4006
4007 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4008
4009 check_ldflags -Wl,--as-needed
4010
4011 if check_func dlopen; then
4012     ldl=
4013 elif check_func dlopen -ldl; then
4014     ldl=-ldl
4015 fi
4016
4017 if ! disabled network; then
4018     check_func getaddrinfo $network_extralibs
4019     check_func getservbyport $network_extralibs
4020     check_func inet_aton $network_extralibs
4021
4022     check_type netdb.h "struct addrinfo"
4023     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4024     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4025     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4026     check_type poll.h "struct pollfd"
4027     check_type netinet/sctp.h "struct sctp_event_subscribe"
4028     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4029     check_type netinet/in.h "struct sockaddr_in6"
4030     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4031     check_type "sys/types.h sys/socket.h" socklen_t
4032
4033     # Prefer arpa/inet.h over winsock2
4034     if check_header arpa/inet.h ; then
4035         check_func closesocket
4036     elif check_header winsock2.h ; then
4037         check_func_headers winsock2.h closesocket -lws2 &&
4038             network_extralibs="-lws2" ||
4039         { check_func_headers winsock2.h closesocket -lws2_32 &&
4040             network_extralibs="-lws2_32"; } || disable winsock2_h network
4041         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4042
4043         check_type ws2tcpip.h socklen_t
4044         check_type ws2tcpip.h "struct addrinfo"
4045         check_type ws2tcpip.h "struct group_source_req"
4046         check_type ws2tcpip.h "struct ip_mreq_source"
4047         check_type ws2tcpip.h "struct ipv6_mreq"
4048         check_type winsock2.h "struct pollfd"
4049         check_struct winsock2.h "struct sockaddr" sa_len
4050         check_type ws2tcpip.h "struct sockaddr_in6"