configure: Miscellaneous minor changes
[libav.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:$PATH
58
59 show_help(){
60     cat <<EOF
61 Usage: configure [options]
62 Options: [defaults in brackets after descriptions]
63
64 Help options:
65   --help                   print this message
66   --quiet                  Suppress showing informative output
67   --list-decoders          show all available decoders
68   --list-encoders          show all available encoders
69   --list-hwaccels          show all available hardware accelerators
70   --list-demuxers          show all available demuxers
71   --list-muxers            show all available muxers
72   --list-parsers           show all available parsers
73   --list-protocols         show all available protocols
74   --list-bsfs              show all available bitstream filters
75   --list-indevs            show all available input devices
76   --list-filters           show all available filters
77
78 Standard options:
79   --logfile=FILE           log tests and output to FILE [avbuild/config.log]
80   --disable-logging        do not log configure debug information
81   --prefix=PREFIX          install in PREFIX [$prefix_default]
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
113 Component options:
114   --disable-doc            do not build documentation
115   --disable-pod2man        do not build manual pages
116   --disable-texi2html      do not build HTML documentation
117   --disable-avdevice       disable libavdevice build
118   --disable-avcodec        disable libavcodec build
119   --disable-avformat       disable libavformat build
120   --disable-avutil         disable libavutil build
121   --disable-swscale        disable libswscale build
122   --disable-avfilter       disable video filter support [no]
123   --disable-avresample     disable libavresample build [no]
124   --disable-pthreads       disable pthreads [auto]
125   --disable-w32threads     disable Win32 threads [auto]
126   --disable-network        disable network support [no]
127   --disable-dct            disable DCT code
128   --disable-error-resilience disable error resilience code
129   --disable-lsp            disable LSP code
130   --disable-lzo            disable LZO decoder code
131   --disable-mdct           disable MDCT code
132   --disable-rdft           disable RDFT code
133   --disable-fft            disable FFT code
134   --disable-faan           disable floating point AAN (I)DCT code
135
136 Individual component options:
137   --disable-everything     disable all components listed below
138   --disable-encoder=NAME   disable encoder NAME
139   --enable-encoder=NAME    enable encoder NAME
140   --disable-encoders       disable all encoders
141   --disable-decoder=NAME   disable decoder NAME
142   --enable-decoder=NAME    enable decoder NAME
143   --disable-decoders       disable all decoders
144   --disable-hwaccel=NAME   disable hwaccel NAME
145   --enable-hwaccel=NAME    enable hwaccel NAME
146   --disable-hwaccels       disable all hwaccels
147   --disable-muxer=NAME     disable muxer NAME
148   --enable-muxer=NAME      enable muxer NAME
149   --disable-muxers         disable all muxers
150   --disable-demuxer=NAME   disable demuxer NAME
151   --enable-demuxer=NAME    enable demuxer NAME
152   --disable-demuxers       disable all demuxers
153   --enable-parser=NAME     enable parser NAME
154   --disable-parser=NAME    disable parser NAME
155   --disable-parsers        disable all parsers
156   --enable-bsf=NAME        enable bitstream filter NAME
157   --disable-bsf=NAME       disable bitstream filter NAME
158   --disable-bsfs           disable all bitstream filters
159   --enable-protocol=NAME   enable protocol NAME
160   --disable-protocol=NAME  disable protocol NAME
161   --disable-protocols      disable all protocols
162   --enable-indev=NAME      enable input device NAME
163   --disable-indev=NAME     disable input device NAME
164   --disable-indevs         disable input devices
165   --disable-devices        disable all devices
166   --enable-filter=NAME     enable filter NAME
167   --disable-filter=NAME    disable filter NAME
168   --disable-filters        disable all filters
169
170 External library support:
171
172   Using any of the following switches will allow Libav to link to the
173   corresponding external library. All the components depending on that library
174   will become enabled, if all their other dependencies are met and they are not
175   explicitly disabled. E.g. --enable-libwavpack will enable linking to
176   libwavpack and allow the libwavpack encoder to be built, unless it is
177   specifically disabled with --disable-encoder=libwavpack.
178
179   Note that only the system libraries are auto-detected. All the other external
180   libraries must be explicitly enabled.
181
182   Also note that the following help text describes the purpose of the libraries
183   themselves, not all their features will necessarily be usable by Libav.
184
185   --enable-avisynth          video frameserver
186   --enable-avxsynth          Linux version of AviSynth
187   --enable-bzlib             bzip2 compression [autodetect]
188   --enable-frei0r            video filtering plugins
189   --enable-gnutls            crypto
190   --enable-libbs2b           Bauer stereophonic-to-binaural DSP
191   --enable-libcdio           audio CD input
192   --enable-libdc1394         IEEE 1394/Firewire camera input
193   --enable-libdcadec         DCA audio decoding
194   --enable-libfaac           AAC audio encoding
195   --enable-libfdk-aac        AAC audio encoding/decoding
196   --enable-libfontconfig     font configuration and management
197   --enable-libfreetype       font rendering
198   --enable-libgsm            GSM audio encoding/decoding
199   --enable-libhdcd           HDCD decoding filter
200   --enable-libilbc           ILBC audio encoding/decoding
201   --enable-libjack           JACK audio sound server
202   --enable-libkvazaar        HEVC video encoding
203   --enable-libmp3lame        MP3 audio encoding
204   --enable-libopencore-amrnb AMR-NB audio encoding/decoding
205   --enable-libopencore-amrwb AMR-WB audio decoding
206   --enable-libopencv         computer vision
207   --enable-libopenh264       H.264 video encoding/decoding
208   --enable-libopenjpeg       JPEG 2000 image encoding/decoding
209   --enable-libopus           Opus audio encoding/decoding
210   --enable-libpulse          Pulseaudio sound server
211   --enable-librtmp           RTMP streaming
212   --enable-libschroedinger   Dirac video encoding/decoding
213   --enable-libsnappy         snappy compression
214   --enable-libspeex          Speex audio encoding/decoding
215   --enable-libtheora         Theora video encoding/decoding
216   --enable-libtwolame        MP2 audio encoding
217   --enable-libvo-aacenc      AAC audio encoding
218   --enable-libvo-amrwbenc    AMR-WB audio encoding
219   --enable-libvorbis         Vorbis audio encoding/decoding
220   --enable-libvpx            VP* video encoding/decoding
221   --enable-libwavpack        Wavpack audio encoding/decoding
222   --enable-libwebp           WebP image encoding/decoding
223   --enable-libx264           H.264 video encoding
224   --enable-libx265           HEVC video encoding
225   --enable-libxavs           Chinese AVS video encoding
226   --enable-libxcb            X window system protocol communication
227   --enable-libxcb-shm        X11 shm communication [auto]
228   --enable-libxcb-xfixes     X11 mouse rendering [auto]
229   --enable-libxvid           MPEG-4 ASP video encoding
230   --enable-openssl           crypto
231   --enable-zlib              compression [autodetect]
232
233   The following libraries provide various hardware acceleration features:
234   --enable-cuda    Nvidia CUDA (dynamically linked)
235   --enable-cuvid   Nvidia CUVID video decode acceleration
236   --enable-d3d11va Microsoft Direct3D 11 video acceleration [auto]
237   --enable-dxva2   Microsoft DirectX 9 video acceleration [auto]
238   --enable-libmfx  Intel MediaSDK (AKA Quick Sync Video)
239   --enable-libnpp  Nvidia CUDA processing
240   --enable-mmal    Broadcom Multi-Media Abstraction Layer (Raspberry Pi)
241   --enable-nvenc   Nvidia video encoding
242   --enable-omx     OpenMAX IL
243   --enable-omx-rpi OpenMAX IL for Raspberry Pi
244   --enable-vaapi   Video Acceleration API (mainly Unix/Intel)
245   --enable-vda     Apple Video Decode Acceleration [auto]
246   --enable-vdpau   Nvidia Video Decode and Presentation API for Unix [auto]
247
248 Toolchain options:
249   --arch=ARCH              select architecture [$arch]
250   --cpu=CPU                select the minimum required CPU (affects
251                            instruction selection, may crash on older CPUs)
252   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
253   --enable-cross-compile   assume a cross-compiler is used
254   --sysroot=PATH           root of cross-build tree
255   --sysinclude=PATH        location of cross-build system headers
256   --target-os=OS           compiler targets OS [$target_os]
257   --target-exec=CMD        command to run executables on target
258   --target-path=DIR        path to view of build directory on target
259   --target-samples=DIR     path to samples directory on target
260   --toolchain=NAME         set tool defaults according to NAME
261   --nm=NM                  use nm tool
262   --ar=AR                  use archive tool AR [$ar_default]
263   --as=AS                  use assembler AS [$as_default]
264   --cc=CC                  use C compiler CC [$cc_default]
265   --objcc=OCC              use ObjC compiler OCC [$cc_default]
266   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
267   --ld=LD                  use linker LD
268   --x86asmexe=X86ASM       use x86 assembler X86ASM
269   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
270   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
271   --host-cc=HOSTCC         use host C compiler HOSTCC
272   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
273   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
274   --host-ld=HOSTLD         use host linker HOSTLD
275   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
276   --host-libs=HLIBS        use libs HLIBS when linking for host
277   --host-os=OS             compiler host OS [$target_os]
278   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
279   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
280   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
281   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
282   --extra-ldsoflags=ELDFLAGS add ELDFLAGS to LDSOFLAGS [$LDSOFLAGS]
283   --extra-libs=ELIBS       add ELIBS [$ELIBS]
284   --extra-version=STRING   version string suffix []
285   --optflags=OPTFLAGS      override optimization-related compiler flags
286   --enable-pic             build position-independent code
287   --enable-thumb           compile for Thumb instruction set
288   --enable-lto             use link-time optimization
289   --env="ENV=override"     override the environment variables
290
291 Advanced options (experts only):
292   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
293   --custom-allocator=NAME  use a supported custom allocator
294   --disable-symver         disable symbol versioning
295   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
296   --disable-safe-bitstream-reader
297                            disable buffer boundary checking in bitreaders
298                            (faster, but may crash)
299   --enable-sram            allow use of on-chip SRAM
300
301 Optimization options (experts only):
302   --disable-asm            disable all assembly optimizations
303   --disable-altivec        disable AltiVec optimizations
304   --disable-vsx            disable VSX optimizations
305   --disable-power8         disable POWER8 optimizations
306   --disable-amd3dnow       disable 3DNow! optimizations
307   --disable-amd3dnowext    disable 3DNow! extended optimizations
308   --disable-mmx            disable MMX optimizations
309   --disable-mmxext         disable MMXEXT optimizations
310   --disable-sse            disable SSE optimizations
311   --disable-sse2           disable SSE2 optimizations
312   --disable-sse3           disable SSE3 optimizations
313   --disable-ssse3          disable SSSE3 optimizations
314   --disable-sse4           disable SSE4 optimizations
315   --disable-sse42          disable SSE4.2 optimizations
316   --disable-avx            disable AVX optimizations
317   --disable-xop            disable XOP optimizations
318   --disable-fma3           disable FMA3 optimizations
319   --disable-fma4           disable FMA4 optimizations
320   --disable-avx2           disable AVX2 optimizations
321   --disable-armv5te        disable armv5te optimizations
322   --disable-armv6          disable armv6 optimizations
323   --disable-armv6t2        disable armv6t2 optimizations
324   --disable-vfp            disable VFP optimizations
325   --disable-neon           disable NEON optimizations
326   --disable-inline-asm     disable use of inline assembly
327   --disable-x86asm         disable use of standalone x86 assembly
328
329 Developer options (useful when working on Libav itself):
330   --disable-debug          disable debugging symbols
331   --enable-debug=LEVEL     set the debug level [$debuglevel]
332   --disable-optimizations  disable compiler optimizations
333   --enable-extra-warnings  enable more compiler warnings
334   --samples=PATH           location of test samples for FATE, if not set use
335                            \$LIBAV_SAMPLES at make invocation time.
336   --enable-neon-clobber-test check NEON registers for clobbering (should be
337                            used only for debugging purposes)
338   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
339                            should be used only for debugging purposes)
340   --disable-valgrind-backtrace do not print a backtrace under Valgrind
341                            (only applies to --disable-optimizations builds)
342   --ignore-tests=TESTS     comma-separated list (without "fate-" prefix
343                            in the name) of tests whose result is ignored
344
345 NOTE: Object files are built at the place where configure is launched.
346 EOF
347   exit 0
348 }
349
350 log(){
351     echo "$@" >> $logfile
352 }
353
354 log_file(){
355     log BEGIN $1
356     i=1
357     while read line; do
358         printf '%5s   %s\n' "${i}" "${line}"
359         i=$(($i+1))
360     done < $1 >> $logfile
361     log END $1
362 }
363
364 echolog(){
365     log "$@"
366     echo "$@"
367 }
368
369 warn(){
370     log "WARNING: $*"
371     WARNINGS="${WARNINGS}WARNING: $*\n"
372 }
373
374 die(){
375     echolog "$@"
376     cat <<EOF
377
378 If you think configure made a mistake, make sure you are using the latest
379 version from Git.  If the latest version fails, report the problem to the
380 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
381 EOF
382     if disabled logging; then
383         cat <<EOF
384 Rerun configure with logging enabled (do not use --disable-logging), and
385 include the log this produces with your report.
386 EOF
387     else
388         cat <<EOF
389 Include the log file "$logfile" produced by configure as this will help
390 solving the problem.
391 EOF
392     fi
393     exit 1
394 }
395
396 # Avoid locale weirdness, besides we really just want to translate ASCII.
397 toupper(){
398     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
399 }
400
401 tolower(){
402     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
403 }
404
405 c_escape(){
406     echo "$*" | sed 's/["\\]/\\\0/g'
407 }
408
409 sh_quote(){
410     v=$(echo "$1" | sed "s/'/'\\\\''/g")
411     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
412     echo "$v"
413 }
414
415 cleanws(){
416     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
417 }
418
419 filter(){
420     pat=$1
421     shift
422     for v; do
423         eval "case '$v' in $pat) printf '%s ' '$v' ;; esac"
424     done
425 }
426
427 filter_out(){
428     pat=$1
429     shift
430     for v; do
431         eval "case '$v' in $pat) ;; *) printf '%s ' '$v' ;; esac"
432     done
433 }
434
435 map(){
436     m=$1
437     shift
438     for v; do eval $m; done
439 }
440
441 add_suffix(){
442     suffix=$1
443     shift
444     for v; do echo ${v}${suffix}; done
445 }
446
447 set_all(){
448     value=$1
449     shift
450     for var in $*; do
451         eval $var=$value
452     done
453 }
454
455 set_weak(){
456     value=$1
457     shift
458     for var; do
459         eval : \${$var:=$value}
460     done
461 }
462
463 sanitize_var_name(){
464     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
465 }
466
467 set_sanitized(){
468     var=$1
469     shift
470     eval $(sanitize_var_name "$var")='$*'
471 }
472
473 get_sanitized(){
474     eval echo \$$(sanitize_var_name "$1")
475 }
476
477 pushvar(){
478     for pvar in $*; do
479         eval level=\${${pvar}_level:=0}
480         eval ${pvar}_${level}="\$$pvar"
481         eval ${pvar}_level=$(($level+1))
482     done
483 }
484
485 popvar(){
486     for pvar in $*; do
487         eval level=\${${pvar}_level:-0}
488         test $level = 0 && continue
489         eval level=$(($level-1))
490         eval $pvar="\${${pvar}_${level}}"
491         eval ${pvar}_level=$level
492         eval unset ${pvar}_${level}
493     done
494 }
495
496 enable(){
497     set_all yes $*
498 }
499
500 disable(){
501     set_all no $*
502 }
503
504 enable_weak(){
505     set_weak yes $*
506 }
507
508 disable_weak(){
509     set_weak no $*
510 }
511
512 enable_sanitized(){
513     for var; do
514         enable $(sanitize_var_name $var)
515     done
516 }
517
518 disable_sanitized(){
519     for var; do
520         disable $(sanitize_var_name $var)
521     done
522 }
523
524 do_enable_deep(){
525     for var; do
526         enabled $var && continue
527         eval sel="\$${var}_select"
528         eval sgs="\$${var}_suggest"
529         pushvar var sgs
530         enable_deep $sel
531         popvar sgs
532         enable_deep_weak $sgs
533         popvar var
534     done
535 }
536
537 enable_deep(){
538     do_enable_deep $*
539     enable $*
540 }
541
542 enable_deep_weak(){
543     for var; do
544         disabled $var && continue
545         pushvar var
546         do_enable_deep $var
547         popvar var
548         enable_weak $var
549     done
550 }
551
552 enabled(){
553     test "${1#!}" = "$1" && op="=" || op="!="
554     eval test "x\$${1#!}" $op "xyes"
555 }
556
557 disabled(){
558     test "${1#!}" = "$1" && op="=" || op="!="
559     eval test "x\$${1#!}" $op "xno"
560 }
561
562 enabled_all(){
563     for opt; do
564         enabled $opt || return 1
565     done
566 }
567
568 disabled_all(){
569     for opt; do
570         disabled $opt || return 1
571     done
572 }
573
574 enabled_any(){
575     for opt; do
576         enabled $opt && return 0
577     done
578 }
579
580 disabled_any(){
581     for opt; do
582         disabled $opt && return 0
583     done
584     return 1
585 }
586
587 set_default(){
588     for opt; do
589         eval : \${$opt:=\$${opt}_default}
590     done
591 }
592
593 is_in(){
594     value=$1
595     shift
596     for var in $*; do
597         [ $var = $value ] && return 0
598     done
599     return 1
600 }
601
602 check_deps(){
603     for cfg; do
604         enabled ${cfg}_checking && die "Circular dependency for $cfg."
605         disabled ${cfg}_checking && continue
606         enable ${cfg}_checking
607
608         eval dep_all="\$${cfg}_deps"
609         eval dep_any="\$${cfg}_deps_any"
610         eval dep_con="\$${cfg}_conflict"
611         eval dep_sel="\$${cfg}_select"
612         eval dep_sgs="\$${cfg}_suggest"
613         eval dep_ifa="\$${cfg}_if"
614         eval dep_ifn="\$${cfg}_if_any"
615
616         pushvar cfg dep_all dep_any dep_con dep_sel dep_sgs dep_ifa dep_ifn
617         check_deps $dep_all $dep_any $dep_con $dep_sel $dep_sgs $dep_ifa $dep_ifn
618         popvar cfg dep_all dep_any dep_con dep_sel dep_sgs dep_ifa dep_ifn
619
620         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
621         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
622         enabled_all  $dep_all || disable $cfg
623         enabled_any  $dep_any || disable $cfg
624         disabled_all $dep_con || disable $cfg
625         disabled_any $dep_sel && disable $cfg
626
627         enabled $cfg && enable_deep_weak $dep_sel $dep_sgs
628
629         for dep in $dep_all $dep_any $dep_sel $dep_sgs; do
630             # filter out library deps, these do not belong in extralibs
631             is_in $dep $LIBRARY_LIST && continue
632             enabled $dep && eval append ${cfg}_extralibs ${dep}_extralibs
633         done
634
635         disable ${cfg}_checking
636     done
637 }
638
639 print_config(){
640     pfx=$1
641     files=$2
642     shift 2
643     map 'eval echo "$v \${$v:-no}"' "$@" |
644     awk "BEGIN { split(\"$files\", files) }
645         {
646             c = \"$pfx\" toupper(\$1);
647             v = \$2;
648             sub(/yes/, 1, v);
649             sub(/no/,  0, v);
650             for (f in files) {
651                 file = files[f];
652                 if (file ~ /\\.h\$/) {
653                     printf(\"#define %s %d\\n\", c, v) >>file;
654                 } else if (file ~ /\\.asm\$/) {
655                     printf(\"%%define %s %d\\n\", c, v) >>file;
656                 } else if (file ~ /\\.mak\$/) {
657                     n = -v ? \"\" : \"!\";
658                     printf(\"%s%s=yes\\n\", n, c) >>file;
659                 }
660             }
661         }"
662 }
663
664 print_enabled(){
665     suf=$1
666     shift
667     for v; do
668         enabled $v && printf "%s\n" ${v%$suf}
669     done
670 }
671
672 append(){
673     var=$1
674     shift
675     eval "$var=\"\$$var $*\""
676 }
677
678 prepend(){
679     var=$1
680     shift
681     eval "$var=\"$* \$$var\""
682 }
683
684 unique(){
685     var=$1
686     uniq_list=""
687     for tok in $(eval echo \$$var); do
688         uniq_list="$(filter_out $tok $uniq_list) $tok"
689     done
690     eval "$var=\"${uniq_list}\""
691 }
692
693 resolve(){
694     var=$1
695     tmpvar=
696     for entry in $(eval echo \$$var); do
697         tmpvar="$tmpvar $(eval echo \$${entry})"
698     done
699     eval "$var=\"${tmpvar}\""
700 }
701
702 add_cppflags(){
703     append CPPFLAGS "$@"
704 }
705
706 add_cflags(){
707     append CFLAGS $($cflags_filter "$@")
708 }
709
710 add_cflags_headers(){
711     append CFLAGS_HEADERS $($cflags_filter "$@")
712 }
713
714 add_asflags(){
715     append ASFLAGS $($asflags_filter "$@")
716 }
717
718 add_objcflags(){
719     append OBJCFLAGS $($objcflags_filter "$@")
720 }
721
722 add_ldflags(){
723     append LDFLAGS $($ldflags_filter "$@")
724 }
725
726 add_ldexeflags(){
727     append LDEXEFLAGS $($ldflags_filter "$@")
728 }
729
730 add_ldsoflags(){
731     append LDSOFLAGS $($ldflags_filter "$@")
732 }
733
734 add_stripflags(){
735     append STRIPFLAGS "$@"
736 }
737
738 add_extralibs(){
739     prepend extralibs $($ldflags_filter "$@")
740 }
741
742 add_host_cppflags(){
743     append host_cppflags "$@"
744 }
745
746 add_host_cflags(){
747     append host_cflags $($host_cflags_filter "$@")
748 }
749
750 add_host_ldflags(){
751     append host_ldflags $($host_ldflags_filter "$@")
752 }
753
754 add_compat(){
755     append compat_objs $1
756     shift
757     map 'add_cppflags -D$v' "$@"
758 }
759
760 check_cmd(){
761     log "$@"
762     "$@" >> $logfile 2>&1
763 }
764
765 cc_o(){
766     eval printf '%s\\n' $CC_O
767 }
768
769 cc_e(){
770     eval printf '%s\\n' $CC_E
771 }
772
773 check_cc(){
774     log check_cc "$@"
775     cat > $TMPC
776     log_file $TMPC
777     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
778 }
779
780 check_objcc(){
781     log check_objcc "$@"
782     cat > $TMPC
783     log_file $TMPC
784     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
785 }
786
787 check_cpp(){
788     log check_cpp "$@"
789     cat > $TMPC
790     log_file $TMPC
791     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
792 }
793
794 as_o(){
795     eval printf '%s\\n' $AS_O
796 }
797
798 check_as(){
799     log check_as "$@"
800     cat > $TMPS
801     log_file $TMPS
802     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
803 }
804
805 check_inline_asm(){
806     log check_inline_asm "$@"
807     name="$1"
808     code="$2"
809     shift 2
810     disable $name
811     check_cc "$@" <<EOF && enable $name
812 void foo(void){ __asm__ volatile($code); }
813 EOF
814 }
815
816 check_insn(){
817     log check_insn "$@"
818     check_inline_asm ${1}_inline "\"$2\""
819     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
820 }
821
822 check_x86asm(){
823     log check_x86asm "$@"
824     echo "$1" > $TMPS
825     log_file $TMPS
826     shift 1
827     check_cmd $x86asmexe $X86ASMFLAGS "$@" -o $TMPO $TMPS
828 }
829
830 ld_o(){
831     eval printf '%s\\n' $LD_O
832 }
833
834 check_ld(){
835     log check_ld "$@"
836     flags=$(filter_out '-l*' "$@")
837     libs=$(filter '-l*' "$@")
838     check_cc $($cflags_filter $flags) || return
839     flags=$($ldflags_filter $flags)
840     libs=$($ldflags_filter $libs)
841     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
842 }
843
844 print_include(){
845     hdr=$1
846     test "${hdr%.h}" = "${hdr}" &&
847         echo "#include $hdr"    ||
848         echo "#include <$hdr>"
849 }
850
851 check_code(){
852     log check_code "$@"
853     check=$1
854     headers=$2
855     code=$3
856     shift 3
857     {
858         for hdr in $headers; do
859             print_include $hdr
860         done
861         echo "int main(void) { $code; return 0; }"
862     } | check_$check "$@"
863 }
864
865 check_cppflags(){
866     log check_cppflags "$@"
867     check_cpp "$@" <<EOF && append CPPFLAGS "$@"
868 #include <stdlib.h>;
869 EOF
870 }
871
872 test_cflags(){
873     log test_cflags "$@"
874     set -- $($cflags_filter "$@")
875     check_cc "$@" <<EOF
876 int x;
877 EOF
878 }
879
880 check_cflags(){
881     log check_cflags "$@"
882     test_cflags "$@" && add_cflags "$@"
883 }
884
885 test_objcflags(){
886     log test_objcflags "$@"
887     set -- $($objcflags_filter "$@")
888     check_objcc "$@" <<EOF
889 int x;
890 EOF
891 }
892
893 check_objcflags(){
894     log check_objcflags "$@"
895     test_objcflags "$@" && add_objcflags "$@"
896 }
897
898 test_ldflags(){
899     log test_ldflags "$@"
900     set -- $($ldflags_filter "$@")
901     check_ld "$@" <<EOF
902 int main(void){ return 0; }
903 EOF
904 }
905
906 check_ldflags(){
907     log check_ldflags "$@"
908     test_ldflags "$@" && add_ldflags "$@"
909 }
910
911 test_stripflags(){
912     log test_stripflags "$@"
913     # call check_cc to get a fresh TMPO
914     check_cc <<EOF
915 int main(void) { return 0; }
916 EOF
917     check_cmd $strip $STRIPFLAGS "$@" $TMPO
918 }
919
920 check_stripflags(){
921     log check_stripflags "$@"
922     test_stripflags "$@" && add_stripflags "$@"
923 }
924
925 check_header(){
926     log check_header "$@"
927     headers=$1
928     shift
929     disable_sanitized $headers
930     {
931         for hdr in $headers; do
932             print_include $hdr
933         done
934         echo "int x;"
935     } | check_cpp "$@" && enable_sanitized $headers
936 }
937
938 check_func(){
939     log check_func "$@"
940     func=$1
941     shift
942     disable $func
943     check_ld "$@" <<EOF && enable $func
944 extern int $func();
945 int main(void){ $func(); }
946 EOF
947 }
948
949 check_mathfunc(){
950     log check_mathfunc "$@"
951     func=$1
952     narg=$2
953     shift 2
954     test $narg = 2 && args="f, g" || args="f"
955     disable $func
956     check_ld "$@" <<EOF && enable $func
957 #include <math.h>
958 float foo(float f, float g) { return $func($args); }
959 int main(void){ return 0; }
960 EOF
961 }
962
963 check_func_headers(){
964     log check_func_headers "$@"
965     headers=$1
966     funcs=$2
967     shift 2
968     {
969         for hdr in $headers; do
970             print_include $hdr
971         done
972         for func in $funcs; do
973             echo "long check_$func(void) { return (long) $func; }"
974         done
975         echo "int main(void) { return 0; }"
976     } | check_ld "$@" && enable $funcs && enable_sanitized $headers
977 }
978
979 check_cpp_condition(){
980     log check_cpp_condition "$@"
981     header=$1
982     condition=$2
983     shift 2
984     check_cpp "$@" <<EOF
985 #include <$header>
986 #if !($condition)
987 #error "unsatisfied condition: $condition"
988 #endif
989 EOF
990 }
991
992 test_cflags_cpp(){
993     log test_cflags_cpp "$@"
994     flags=$1
995     condition=$2
996     shift 2
997     set -- $($cflags_filter "$flags")
998     check_cpp "$@" <<EOF
999 #if !($condition)
1000 #error "unsatisfied condition: $condition"
1001 #endif
1002 EOF
1003 }
1004
1005 check_lib(){
1006     log check_lib "$@"
1007     name="$1"
1008     headers="$2"
1009     funcs="$3"
1010     shift 3
1011     disable $name
1012     check_func_headers "$headers" "$funcs" "$@" &&
1013         enable $name && eval ${name}_extralibs="\$@"
1014 }
1015
1016 test_pkg_config(){
1017     log test_pkg_config "$@"
1018     name="$1"
1019     pkg_version="$2"
1020     pkg="${2%% *}"
1021     headers="$3"
1022     funcs="$4"
1023     shift 4
1024     disable $name
1025     check_cmd $pkg_config --exists --print-errors $pkg_version || return
1026     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1027     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1028     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1029         enable $name &&
1030         set_sanitized "${name}_cflags"    $pkg_cflags &&
1031         set_sanitized "${name}_extralibs" $pkg_libs
1032 }
1033
1034 check_pkg_config(){
1035     log check_pkg_config "$@"
1036     name="$1"
1037     test_pkg_config "$@" &&
1038         eval add_cflags \$${name}_cflags
1039 }
1040
1041 check_exec(){
1042     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1043 }
1044
1045 check_exec_crash(){
1046     log check_exec_crash "$@"
1047     code=$(cat)
1048
1049     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1050     # are safe but may not be available everywhere.  Thus we use
1051     # raise(SIGTERM) instead.  The check is run in a subshell so we
1052     # can redirect the "Terminated" message from the shell.  SIGBUS
1053     # is not defined by standard C so it is used conditionally.
1054
1055     (check_exec "$@") >> $logfile 2>&1 <<EOF
1056 #include <signal.h>
1057 static void sighandler(int sig){
1058     raise(SIGTERM);
1059 }
1060 int foo(void){
1061     $code
1062 }
1063 int (*func_ptr)(void) = foo;
1064 int main(void){
1065     signal(SIGILL, sighandler);
1066     signal(SIGFPE, sighandler);
1067     signal(SIGSEGV, sighandler);
1068 #ifdef SIGBUS
1069     signal(SIGBUS, sighandler);
1070 #endif
1071     return func_ptr();
1072 }
1073 EOF
1074 }
1075
1076 check_type(){
1077     log check_type "$@"
1078     headers=$1
1079     type=$2
1080     shift 2
1081     disable_sanitized "$type"
1082     check_code cc "$headers" "$type v" "$@" && enable_sanitized "$type"
1083 }
1084
1085 check_struct(){
1086     log check_struct "$@"
1087     headers=$1
1088     struct=$2
1089     member=$3
1090     shift 3
1091     disable_sanitized "${struct}_${member}"
1092     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1093         enable_sanitized "${struct}_${member}"
1094 }
1095
1096 check_builtin(){
1097     log check_builtin "$@"
1098     name=$1
1099     headers=$2
1100     builtin=$3
1101     shift 3
1102     disable "$name"
1103     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1104 }
1105
1106 check_compile_assert(){
1107     log check_compile_assert "$@"
1108     name=$1
1109     headers=$2
1110     condition=$3
1111     shift 3
1112     disable "$name"
1113     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1114 }
1115
1116 require(){
1117     log require "$@"
1118     name_version="$1"
1119     name="${1%% *}"
1120     headers="$2"
1121     func="$3"
1122     shift 3
1123     check_lib $name "$headers" $func "$@" || die "ERROR: $name_version not found"
1124 }
1125
1126 require_header(){
1127     log require_header "$@"
1128     headers="$1"
1129     shift
1130     check_header "$headers" "$@" || die "ERROR: $headers not found"
1131 }
1132
1133 require_cpp_condition(){
1134     log require_cpp_condition "$@"
1135     header="$1"
1136     condition="$2"
1137     shift 2
1138     check_cpp_condition "$header" "$condition" "$@" || die "ERROR: $condition not satisfied"
1139 }
1140
1141 require_pkg_config(){
1142     log require_pkg_config "$@"
1143     pkg_version="$2"
1144     check_pkg_config "$@" || die "ERROR: $pkg_version not found"
1145 }
1146
1147 hostcc_e(){
1148     eval printf '%s\\n' $HOSTCC_E
1149 }
1150
1151 hostcc_o(){
1152     eval printf '%s\\n' $HOSTCC_O
1153 }
1154
1155 check_host_cc(){
1156     log check_host_cc "$@"
1157     cat > $TMPC
1158     log_file $TMPC
1159     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1160 }
1161
1162 check_host_cpp(){
1163     log check_host_cpp "$@"
1164     cat > $TMPC
1165     log_file $TMPC
1166     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1167 }
1168
1169 check_host_cppflags(){
1170     log check_host_cppflags "$@"
1171     check_host_cpp "$@" <<EOF && append host_cppflags "$@"
1172 #include <stdlib.h>;
1173 EOF
1174 }
1175
1176 check_host_cflags(){
1177     log check_host_cflags "$@"
1178     set -- $($host_cflags_filter "$@")
1179     check_host_cc "$@" <<EOF && append host_cflags "$@"
1180 int x;
1181 EOF
1182 }
1183
1184 check_host_cpp_condition(){
1185     log check_host_cpp_condition "$@"
1186     header=$1
1187     condition=$2
1188     shift 2
1189     check_host_cpp "$@" <<EOF
1190 #include <$header>
1191 #if !($condition)
1192 #error "unsatisfied condition: $condition"
1193 #endif
1194 EOF
1195 }
1196
1197 cp_if_changed(){
1198     cmp -s "$1" "$2" && { test "$quiet" != "yes" && echo "$2 is unchanged"; } && return
1199     mkdir -p "$(dirname $2)"
1200     cp -f "$1" "$2"
1201 }
1202
1203 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1204 # system-dependent things.
1205
1206 AVCODEC_COMPONENTS="
1207     bsfs
1208     decoders
1209     encoders
1210     hwaccels
1211     parsers
1212 "
1213
1214 AVDEVICE_COMPONENTS="
1215     indevs
1216 "
1217 AVFILTER_COMPONENTS="
1218     filters
1219 "
1220 AVFORMAT_COMPONENTS="
1221     demuxers
1222     muxers
1223     protocols
1224 "
1225
1226 COMPONENT_LIST="
1227     $AVCODEC_COMPONENTS
1228     $AVDEVICE_COMPONENTS
1229     $AVFILTER_COMPONENTS
1230     $AVFORMAT_COMPONENTS
1231 "
1232
1233 EXAMPLE_LIST="
1234     decode_audio_example
1235     decode_video_example
1236     encode_audio_example
1237     encode_video_example
1238     filter_audio_example
1239     metadata_example
1240     output_example
1241     qsvdec_example
1242     transcode_aac_example
1243 "
1244
1245 # catchall list of things that require external libs to link
1246 EXTRALIBS_LIST="
1247     cpu_init
1248     cws2fws
1249 "
1250
1251 HWACCEL_LIBRARY_NONFREE_LIST="
1252     cuda
1253     cuvid
1254     libnpp
1255 "
1256 HWACCEL_LIBRARY_LIST="
1257     $HWACCEL_LIBRARY_NONFREE_LIST
1258     d3d11va
1259     dxva2
1260     libmfx
1261     mmal
1262     nvenc
1263     omx
1264     vaapi
1265     vda
1266     vdpau
1267 "
1268
1269 EXTERNAL_LIBRARY_GPL_LIST="
1270     libcdio
1271     libx264
1272     libx265
1273     libxavs
1274     libxvid
1275 "
1276
1277 EXTERNAL_LIBRARY_NONFREE_LIST="
1278     libfaac
1279     libfdk_aac
1280     openssl
1281 "
1282
1283 EXTERNAL_LIBRARY_VERSION3_LIST="
1284     libopencore_amrnb
1285     libopencore_amrwb
1286     libvo_aacenc
1287     libvo_amrwbenc
1288 "
1289
1290 EXTERNAL_LIBRARY_LIST="
1291     $EXTERNAL_LIBRARY_GPL_LIST
1292     $EXTERNAL_LIBRARY_NONFREE_LIST
1293     $EXTERNAL_LIBRARY_VERSION3_LIST
1294     avisynth
1295     avxsynth
1296     frei0r
1297     gnutls
1298     libbs2b
1299     libdc1394
1300     libdcadec
1301     libfontconfig
1302     libfreetype
1303     libgsm
1304     libhdcd
1305     libilbc
1306     libjack
1307     libkvazaar
1308     libmp3lame
1309     libopencv
1310     libopenh264
1311     libopenjpeg
1312     libopus
1313     libpulse
1314     librtmp
1315     libschroedinger
1316     libsnappy
1317     libspeex
1318     libtheora
1319     libtwolame
1320     libvorbis
1321     libvpx
1322     libwavpack
1323     libwebp
1324     libxcb
1325     libxcb_shm
1326     libxcb_xfixes
1327 "
1328
1329 SYSTEM_LIBRARY_LIST="
1330     bzlib
1331     zlib
1332 "
1333
1334 FEATURE_LIST="
1335     gray
1336     hardcoded_tables
1337     omx_rpi
1338     runtime_cpudetect
1339     safe_bitstream_reader
1340     shared
1341     small
1342     sram
1343     static
1344     swscale_alpha
1345 "
1346
1347 LIBRARY_LIST="
1348     avcodec
1349     avdevice
1350     avfilter
1351     avformat
1352     avresample
1353     avutil
1354     swscale
1355 "
1356
1357 LICENSE_LIST="
1358     gpl
1359     nonfree
1360     version3
1361 "
1362
1363 PROGRAM_LIST="
1364     avconv
1365     avplay
1366     avprobe
1367 "
1368
1369 SUBSYSTEM_LIST="
1370     dct
1371     doc
1372     error_resilience
1373     faan
1374     fft
1375     lsp
1376     lzo
1377     mdct
1378     network
1379     rdft
1380 "
1381
1382 # COMPONENT_LIST needs to come last to ensure correct dependency checking
1383 CONFIG_LIST="
1384     $EXAMPLE_LIST
1385     $EXTERNAL_LIBRARY_LIST
1386     $HWACCEL_LIBRARY_LIST
1387     $FEATURE_LIST
1388     $LICENSE_LIST
1389     $LIBRARY_LIST
1390     $PROGRAM_LIST
1391     $SUBSYSTEM_LIST
1392     $SYSTEM_LIBRARY_LIST
1393     neon_clobber_test
1394     pic
1395     pod2man
1396     texi2html
1397     thumb
1398     valgrind_backtrace
1399     xmm_clobber_test
1400     $COMPONENT_LIST
1401 "
1402
1403 THREADS_LIST="
1404     pthreads
1405     w32threads
1406 "
1407
1408 ATOMICS_LIST="
1409     atomics_gcc
1410     atomics_suncc
1411     atomics_win32
1412 "
1413
1414 ARCH_LIST="
1415     aarch64
1416     alpha
1417     arm
1418     avr32
1419     avr32_ap
1420     avr32_uc
1421     bfin
1422     ia64
1423     m68k
1424     mips
1425     mips64
1426     parisc
1427     ppc
1428     ppc64
1429     s390
1430     sh4
1431     sparc
1432     sparc64
1433     tilegx
1434     tilepro
1435     tomi
1436     x86
1437     x86_32
1438     x86_64
1439 "
1440
1441 ARCH_EXT_LIST_ARM="
1442     armv5te
1443     armv6
1444     armv6t2
1445     armv8
1446     neon
1447     vfp
1448     vfpv3
1449 "
1450
1451 ARCH_EXT_LIST_X86_SIMD="
1452     amd3dnow
1453     amd3dnowext
1454     avx
1455     avx2
1456     fma3
1457     fma4
1458     mmx
1459     mmxext
1460     sse
1461     sse2
1462     sse3
1463     sse4
1464     sse42
1465     ssse3
1466     xop
1467 "
1468
1469 ARCH_EXT_LIST_PPC="
1470     altivec
1471     dcbzl
1472     ldbrx
1473     power8
1474     ppc4xx
1475     vsx
1476 "
1477
1478 ARCH_EXT_LIST_X86="
1479     $ARCH_EXT_LIST_X86_SIMD
1480     cpunop
1481     i686
1482 "
1483
1484 ARCH_EXT_LIST_MIPS="
1485     loongson
1486     mips32r1
1487     mips64r1
1488     mips32r2
1489     mips64r2
1490     mips32r6
1491     mips64r6
1492 "
1493
1494 ARCH_EXT_LIST="
1495     $ARCH_EXT_LIST_ARM
1496     $ARCH_EXT_LIST_MIPS
1497     $ARCH_EXT_LIST_PPC
1498     $ARCH_EXT_LIST_X86
1499     vis
1500 "
1501
1502 ARCH_FEATURES="
1503     aligned_stack
1504     fast_64bit
1505     fast_clz
1506     fast_cmov
1507     local_aligned_8
1508     local_aligned_16
1509     local_aligned_32
1510     simd_align_16
1511     simd_align_32
1512 "
1513
1514 BUILTIN_LIST="
1515     atomic_cas_ptr
1516     machine_rw_barrier
1517     MemoryBarrier
1518     mm_empty
1519     rdtsc
1520     sem_timedwait
1521     sync_val_compare_and_swap
1522 "
1523 HAVE_LIST_CMDLINE="
1524     inline_asm
1525     symver
1526     x86asm
1527 "
1528
1529 HAVE_LIST_PUB="
1530     bigendian
1531     fast_unaligned
1532 "
1533
1534 HEADERS_LIST="
1535     AVFoundation_AVFoundation_h
1536     arpa_inet_h
1537     cdio_paranoia_h
1538     cdio_paranoia_paranoia_h
1539     dispatch_dispatch_h
1540     dev_bktr_ioctl_bt848_h
1541     dev_bktr_ioctl_meteor_h
1542     dev_ic_bt8xx_h
1543     dev_video_bktr_ioctl_bt848_h
1544     dev_video_meteor_ioctl_meteor_h
1545     direct_h
1546     dxgidebug_h
1547     dxva_h
1548     io_h
1549     machine_ioctl_bt848_h
1550     machine_ioctl_meteor_h
1551     malloc_h
1552     poll_h
1553     sys_param_h
1554     sys_resource_h
1555     sys_select_h
1556     sys_soundcard_h
1557     sys_time_h
1558     sys_un_h
1559     sys_videoio_h
1560     unistd_h
1561     valgrind_valgrind_h
1562     windows_h
1563     winsock2_h
1564 "
1565
1566 INTRINSICS_LIST="
1567     intrinsics_neon
1568 "
1569
1570 MATH_FUNCS="
1571     atanf
1572     atan2f
1573     cbrtf
1574     cosf
1575     exp2
1576     exp2f
1577     expf
1578     isinf
1579     isnan
1580     ldexpf
1581     llrint
1582     llrintf
1583     log2
1584     log2f
1585     log10f
1586     lrint
1587     lrintf
1588     powf
1589     rint
1590     round
1591     roundf
1592     sinf
1593     trunc
1594     truncf
1595 "
1596
1597 SYSTEM_FEATURES="
1598     dos_paths
1599     libc_msvcrt
1600     MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
1601     section_data_rel_ro
1602     threads
1603     uwp
1604 "
1605
1606 SYSTEM_FUNCS="
1607     aligned_malloc
1608     clock_gettime
1609     closesocket
1610     CommandLineToArgvW
1611     fcntl
1612     getaddrinfo
1613     gethrtime
1614     getopt
1615     GetProcessAffinityMask
1616     GetProcessMemoryInfo
1617     GetProcessTimes
1618     getrusage
1619     GetSystemTimeAsFileTime
1620     gettimeofday
1621     gmtime_r
1622     inet_aton
1623     isatty
1624     localtime_r
1625     mach_absolute_time
1626     MapViewOfFile
1627     memalign
1628     mmap
1629     mprotect
1630     nanosleep
1631     posix_memalign
1632     sched_getaffinity
1633     SetConsoleTextAttribute
1634     setmode
1635     setrlimit
1636     Sleep
1637     strerror_r
1638     sysconf
1639     sysctl
1640     usleep
1641     VirtualAlloc
1642 "
1643
1644 SYSTEM_LIBRARIES="
1645     sdl
1646     vaapi_1
1647     vaapi_drm
1648     vaapi_x11
1649     vdpau_x11
1650     wincrypt
1651 "
1652
1653 TOOLCHAIN_FEATURES="
1654     as_arch_directive
1655     as_fpu_directive
1656     as_func
1657     as_object_arch
1658     asm_mod_q
1659     blocks_extension
1660     ebp_available
1661     ebx_available
1662     gnu_as
1663     ibm_asm
1664     inline_asm_labels
1665     pragma_deprecated
1666     symver_asm_label
1667     symver_gnu_asm
1668     vfp_args
1669     xform_asm
1670     xmm_clobbers
1671 "
1672
1673 TYPES_LIST="
1674     CONDITION_VARIABLE_Ptr
1675     CUVIDDECODECREATEINFO_bitDepthMinus8
1676     socklen_t
1677     struct_addrinfo
1678     struct_group_source_req
1679     struct_ip_mreq_source
1680     struct_ipv6_mreq
1681     struct_pollfd
1682     struct_rusage_ru_maxrss
1683     struct_sockaddr_in6
1684     struct_sockaddr_sa_len
1685     struct_sockaddr_storage
1686     struct_v4l2_frmivalenum_discrete
1687 "
1688
1689 HAVE_LIST="
1690     $ARCH_EXT_LIST
1691     $(add_suffix _external $ARCH_EXT_LIST)
1692     $(add_suffix _inline   $ARCH_EXT_LIST)
1693     $ARCH_FEATURES
1694     $BUILTIN_LIST
1695     $HAVE_LIST_CMDLINE
1696     $HAVE_LIST_PUB
1697     $HEADERS_LIST
1698     $INTRINSICS_LIST
1699     $MATH_FUNCS
1700     $SYSTEM_FEATURES
1701     $SYSTEM_FUNCS
1702     $SYSTEM_LIBRARIES
1703     $THREADS_LIST
1704     $TOOLCHAIN_FEATURES
1705     $TYPES_LIST
1706 "
1707
1708 # options emitted with CONFIG_ prefix but not available on the command line
1709 CONFIG_EXTRA="
1710     aandcttables
1711     ac3dsp
1712     adts_header
1713     audio_frame_queue
1714     audiodsp
1715     blockdsp
1716     bswapdsp
1717     cabac
1718     cbs
1719     cbs_h264
1720     cbs_h265
1721     cbs_mpeg2
1722     dirac_parse
1723     dvprofile
1724     faandct
1725     faanidct
1726     fdctdsp
1727     flacdsp
1728     fmtconvert
1729     g722dsp
1730     gmp
1731     golomb
1732     gplv3
1733     h263dsp
1734     h264chroma
1735     h264dsp
1736     h264parse
1737     h264pred
1738     h264qpel
1739     hevcparse
1740     hpeldsp
1741     huffman
1742     huffyuvdsp
1743     huffyuvencdsp
1744     idctdsp
1745     iirfilter
1746     imdct15
1747     intrax8
1748     iso_media
1749     ividsp
1750     jpegtables
1751     lgplv3
1752     libx262
1753     libxcb_shape
1754     lpc
1755     lzf
1756     me_cmp
1757     mpeg_er
1758     mpegaudio
1759     mpegaudiodsp
1760     mpegaudioheader
1761     mpegvideo
1762     mpegvideoenc
1763     mss34dsp
1764     pixblockdsp
1765     qpeldsp
1766     qsv
1767     qsvdec
1768     qsvenc
1769     qsvvpp
1770     rangecoder
1771     riffdec
1772     riffenc
1773     rtpdec
1774     rtpenc_chain
1775     rv34dsp
1776     sinewin
1777     snappy
1778     srtp
1779     startcode
1780     texturedsp
1781     texturedspenc
1782     tpeldsp
1783     vaapi_encode
1784     vc1dsp
1785     videodsp
1786     vp3dsp
1787     vp56dsp
1788     vp8dsp
1789     wma_freqs
1790     wmv2dsp
1791 "
1792
1793 CMDLINE_SELECT="
1794     $ARCH_EXT_LIST
1795     $CONFIG_LIST
1796     $HAVE_LIST_CMDLINE
1797     $THREADS_LIST
1798     asm
1799     cross_compile
1800     debug
1801     extra_warnings
1802     logging
1803     lto
1804     optimizations
1805     rpath
1806 "
1807
1808 PATHS_LIST="
1809     bindir
1810     datadir
1811     docdir
1812     incdir
1813     libdir
1814     mandir
1815     prefix
1816     shlibdir
1817 "
1818
1819 CMDLINE_SET="
1820     $PATHS_LIST
1821     ar
1822     arch
1823     as
1824     cc
1825     objcc
1826     cpu
1827     cross_prefix
1828     custom_allocator
1829     dep_cc
1830     env
1831     extra_version
1832     host_cc
1833     host_cflags
1834     host_extralibs
1835     host_ld
1836     host_ldflags
1837     host_os
1838     ignore_tests
1839     ld
1840     logfile
1841     malloc_prefix
1842     nm
1843     optflags
1844     pkg_config
1845     pkg_config_flags
1846     samples
1847     sysinclude
1848     sysroot
1849     target_exec
1850     target_os
1851     target_path
1852     target_samples
1853     toolchain
1854     x86asmexe
1855 "
1856
1857 CMDLINE_APPEND="
1858     extra_cflags
1859     extra_objcflags
1860     host_cppflags
1861 "
1862
1863 # code dependency declarations
1864
1865 # architecture extensions
1866
1867 armv5te_deps="arm"
1868 armv6_deps="arm"
1869 armv6t2_deps="arm"
1870 armv8_deps="aarch64"
1871 neon_deps_any="aarch64 arm"
1872 intrinsics_neon_deps="neon"
1873 vfp_deps_any="aarch64 arm"
1874 vfpv3_deps="vfp"
1875
1876 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1877
1878 altivec_deps="ppc"
1879 dcbzl_deps="ppc"
1880 ldbrx_deps="ppc"
1881 ppc4xx_deps="ppc"
1882 vsx_deps="altivec"
1883 power8_deps="vsx"
1884
1885 loongson_deps="mips"
1886 mips32r1_deps="mips32"
1887 mips32r2_deps="mips32"
1888 mips32r6_deps="mips32"
1889 mips64r1_deps="mips64"
1890 mips64r2_deps="mips64"
1891 mips64r6_deps="mips64"
1892
1893 vis_deps="sparc"
1894
1895 cpunop_deps="i686"
1896 x86_64_select="i686"
1897 x86_64_suggest="fast_cmov"
1898
1899 amd3dnow_deps="mmx"
1900 amd3dnowext_deps="amd3dnow"
1901 i686_deps="x86"
1902 mmx_deps="x86"
1903 mmxext_deps="mmx"
1904 sse_deps="mmxext"
1905 sse2_deps="sse"
1906 sse3_deps="sse2"
1907 ssse3_deps="sse3"
1908 sse4_deps="ssse3"
1909 sse42_deps="sse4"
1910 avx_deps="sse42"
1911 xop_deps="avx"
1912 fma3_deps="avx"
1913 fma4_deps="avx"
1914 avx2_deps="avx"
1915
1916 mmx_external_deps="x86asm"
1917 mmx_inline_deps="inline_asm x86"
1918 mmx_suggest="mmx_external mmx_inline"
1919
1920 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1921     eval dep=\$${ext}_deps
1922     eval ${ext}_external_deps='"${dep}_external"'
1923     eval ${ext}_inline_deps='"${dep}_inline"'
1924     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1925 done
1926
1927 aligned_stack_if_any="aarch64 ppc x86"
1928 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1929 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1930 fast_unaligned_if_any="aarch64 ppc x86"
1931 simd_align_16_if_any="altivec neon sse"
1932 simd_align_32_if_any="avx"
1933
1934 # system capabilities
1935 symver_if_any="symver_asm_label symver_gnu_asm"
1936 valgrind_backtrace_conflict="optimizations"
1937 valgrind_backtrace_deps="valgrind_valgrind_h"
1938
1939 # threading support
1940 atomics_gcc_if="sync_val_compare_and_swap"
1941 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1942 atomics_win32_if="MemoryBarrier"
1943 atomics_native_if_any="$ATOMICS_LIST"
1944 w32threads_deps="atomics_native"
1945 threads_if_any="$THREADS_LIST"
1946
1947 # subsystems
1948 cbs_h264_select="cbs golomb"
1949 cbs_h265_select="cbs golomb"
1950 cbs_mpeg2_select="cbs"
1951 dct_select="rdft"
1952 dirac_parse_select="golomb"
1953 error_resilience_select="me_cmp"
1954 faandct_deps="faan"
1955 faandct_select="fdctdsp"
1956 faanidct_deps="faan"
1957 faanidct_select="idctdsp"
1958 h264dsp_select="startcode"
1959 hevcparse_select="golomb"
1960 intrax8_select="blockdsp idctdsp"
1961 mdct_select="fft"
1962 rdft_select="fft"
1963 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1964 mpeg_er_select="error_resilience"
1965 mpegaudio_select="mpegaudiodsp mpegaudioheader"
1966 mpegaudiodsp_select="dct"
1967 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp mpeg_er videodsp"
1968 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1969 vc1dsp_select="h264chroma qpeldsp startcode"
1970
1971 # decoders / encoders
1972 aac_decoder_select="adts_header imdct15 mdct sinewin"
1973 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1974 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1975 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1976 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1977 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1978 adpcm_g722_decoder_select="g722dsp"
1979 adpcm_g722_encoder_select="g722dsp"
1980 aic_decoder_select="golomb idctdsp"
1981 alac_encoder_select="lpc"
1982 als_decoder_select="bswapdsp"
1983 amrnb_decoder_select="lsp"
1984 amrwb_decoder_select="lsp"
1985 amv_decoder_select="sp5x_decoder"
1986 ape_decoder_select="bswapdsp"
1987 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1988 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1989 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1990 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1991 atrac1_decoder_select="mdct sinewin"
1992 atrac3_decoder_select="mdct"
1993 atrac3p_decoder_select="mdct sinewin"
1994 bink_decoder_select="blockdsp hpeldsp"
1995 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1996 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1997 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1998 clearvideo_decoder_select="idctdsp"
1999 cllc_decoder_select="bswapdsp"
2000 comfortnoise_encoder_select="lpc"
2001 cook_decoder_select="audiodsp mdct sinewin"
2002 cscd_decoder_select="lzo"
2003 cscd_decoder_suggest="zlib"
2004 dca_decoder_select="fmtconvert mdct"
2005 dds_decoder_select="texturedsp"
2006 dnxhd_decoder_select="blockdsp idctdsp"
2007 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
2008 dvvideo_decoder_select="dvprofile idctdsp"
2009 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
2010 dxa_decoder_deps="zlib"
2011 dxv_decoder_select="lzf texturedsp"
2012 eac3_decoder_select="ac3_decoder"
2013 eac3_encoder_select="ac3_encoder"
2014 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
2015 eatgq_decoder_select="aandcttables idctdsp"
2016 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
2017 exr_decoder_deps="zlib"
2018 ffv1_decoder_select="rangecoder"
2019 ffv1_encoder_select="rangecoder"
2020 ffvhuff_decoder_select="huffyuv_decoder"
2021 ffvhuff_encoder_select="huffyuv_encoder"
2022 fic_decoder_select="golomb"
2023 flac_decoder_select="flacdsp"
2024 flac_encoder_select="bswapdsp flacdsp lpc"
2025 flashsv_decoder_deps="zlib"
2026 flashsv_encoder_deps="zlib"
2027 flashsv2_decoder_deps="zlib"
2028 flv_decoder_select="h263_decoder"
2029 flv_encoder_select="h263_encoder"
2030 fourxm_decoder_select="blockdsp bswapdsp"
2031 fraps_decoder_select="bswapdsp huffman"
2032 g2m_decoder_deps="zlib"
2033 g2m_decoder_select="blockdsp idctdsp jpegtables"
2034 h261_decoder_select="mpeg_er mpegvideo"
2035 h261_encoder_select="aandcttables mpegvideoenc"
2036 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
2037 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
2038 h263i_decoder_select="h263_decoder"
2039 h263p_encoder_select="h263_encoder"
2040 h264_decoder_select="cabac golomb h264chroma h264dsp h264parse h264pred h264qpel videodsp"
2041 h264_decoder_suggest="error_resilience"
2042 hap_decoder_select="snappy texturedsp"
2043 hap_encoder_deps="libsnappy"
2044 hap_encoder_select="texturedspenc"
2045 hevc_decoder_select="bswapdsp cabac hevcparse videodsp"
2046 huffyuv_decoder_select="bswapdsp huffyuvdsp"
2047 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
2048 iac_decoder_select="imc_decoder"
2049 imc_decoder_select="bswapdsp fft mdct sinewin"
2050 indeo3_decoder_select="hpeldsp"
2051 indeo4_decoder_select="ividsp"
2052 indeo5_decoder_select="ividsp"
2053 interplay_video_decoder_select="hpeldsp"
2054 jpegls_decoder_select="mjpeg_decoder"
2055 jv_decoder_select="blockdsp"
2056 lagarith_decoder_select="huffyuvdsp"
2057 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
2058 magicyuv_decoder_select="huffyuvdsp"
2059 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2060 metasound_decoder_select="lsp mdct sinewin"
2061 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2062 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
2063 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
2064 mjpegb_decoder_select="mjpeg_decoder"
2065 mlp_decoder_select="mlp_parser"
2066 motionpixels_decoder_select="bswapdsp"
2067 mp1_decoder_select="mpegaudio"
2068 mp1float_decoder_select="mpegaudio"
2069 mp2_decoder_select="mpegaudio"
2070 mp2float_decoder_select="mpegaudio"
2071 mp3_decoder_select="mpegaudio"
2072 mp3adu_decoder_select="mpegaudio"
2073 mp3adufloat_decoder_select="mpegaudio"
2074 mp3float_decoder_select="mpegaudio"
2075 mp3on4_decoder_select="mpegaudio"
2076 mp3on4float_decoder_select="mpegaudio"
2077 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2078 mpc8_decoder_select="mpegaudiodsp"
2079 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2080 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2081 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2082 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2083 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2084 mpeg4_encoder_select="h263_encoder"
2085 msa1_decoder_select="mss34dsp"
2086 msmpeg4v1_decoder_select="h263_decoder"
2087 msmpeg4v2_decoder_select="h263_decoder"
2088 msmpeg4v2_encoder_select="h263_encoder"
2089 msmpeg4v3_decoder_select="h263_decoder"
2090 msmpeg4v3_encoder_select="h263_encoder"
2091 mss2_decoder_select="error_resilience mpeg_er mpegvideo qpeldsp vc1_decoder"
2092 mts2_decoder_select="mss34dsp"
2093 mxpeg_decoder_select="mjpeg_decoder"
2094 nellymoser_decoder_select="mdct sinewin"
2095 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2096 nuv_decoder_select="idctdsp lzo"
2097 on2avc_decoder_select="mdct"
2098 opus_decoder_deps="avresample"
2099 opus_decoder_select="imdct15"
2100 png_decoder_deps="zlib"
2101 png_encoder_deps="zlib"
2102 png_encoder_select="huffyuvencdsp"
2103 prores_decoder_select="idctdsp"
2104 prores_encoder_select="fdctdsp"
2105 qcelp_decoder_select="lsp"
2106 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2107 ra_144_encoder_select="audio_frame_queue lpc"
2108 ralf_decoder_select="golomb"
2109 rscc_decoder_deps="zlib"
2110 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2111 rv10_encoder_select="h263_encoder"
2112 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2113 rv20_encoder_select="h263_encoder"
2114 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2115 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2116 screenpresso_decoder_deps="zlib"
2117 sipr_decoder_select="lsp"
2118 sp5x_decoder_select="mjpeg_decoder"
2119 svq1_decoder_select="hpeldsp"
2120 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2121 svq3_decoder_select="golomb h264dsp h264parse h264pred hpeldsp tpeldsp videodsp"
2122 svq3_decoder_suggest="zlib"
2123 tak_decoder_select="audiodsp"
2124 tdsc_decoder_deps="zlib"
2125 tdsc_decoder_select="mjpeg_decoder"
2126 theora_decoder_select="vp3_decoder"
2127 thp_decoder_select="mjpeg_decoder"
2128 tiff_decoder_suggest="zlib"
2129 tiff_encoder_suggest="zlib"
2130 truehd_decoder_select="mlp_decoder"
2131 truemotion2_decoder_select="bswapdsp"
2132 truespeech_decoder_select="bswapdsp"
2133 tscc_decoder_deps="zlib"
2134 txd_decoder_select="texturedsp"
2135 twinvq_decoder_select="mdct lsp sinewin"
2136 utvideo_decoder_select="bswapdsp huffyuvdsp"
2137 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2138 vble_decoder_select="huffyuvdsp"
2139 vc1_decoder_select="blockdsp error_resilience h263_decoder h264qpel intrax8 mpeg_er mpegvideo vc1dsp"
2140 vc1image_decoder_select="vc1_decoder"
2141 vorbis_decoder_select="mdct"
2142 vorbis_encoder_select="mdct"
2143 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2144 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2145 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2146 vp6a_decoder_select="vp6_decoder"
2147 vp6f_decoder_select="vp6_decoder"
2148 vp7_decoder_select="h264pred videodsp vp8dsp"
2149 vp8_decoder_select="h264pred videodsp vp8dsp"
2150 vp9_decoder_select="videodsp vp9_superframe_split_bsf"
2151 webp_decoder_select="vp8_decoder"
2152 wmapro_decoder_select="mdct sinewin wma_freqs"
2153 wmav1_decoder_select="mdct sinewin wma_freqs"
2154 wmav1_encoder_select="mdct sinewin wma_freqs"
2155 wmav2_decoder_select="mdct sinewin wma_freqs"
2156 wmav2_encoder_select="mdct sinewin wma_freqs"
2157 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2158 wmv1_decoder_select="h263_decoder"
2159 wmv1_encoder_select="h263_encoder"
2160 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2161 wmv2_encoder_select="h263_encoder wmv2dsp"
2162 wmv3_decoder_select="vc1_decoder"
2163 wmv3image_decoder_select="wmv3_decoder"
2164 zerocodec_decoder_deps="zlib"
2165 zlib_decoder_deps="zlib"
2166 zlib_encoder_deps="zlib"
2167 zmbv_decoder_deps="zlib"
2168 zmbv_encoder_deps="zlib"
2169
2170 # hardware accelerators
2171 d3d11va_deps="dxva_h ID3D11VideoDecoder"
2172 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode ole32"
2173 vda_deps="VideoDecodeAcceleration_VDADecoder_h blocks_extension pthreads"
2174 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2175
2176 h263_vaapi_hwaccel_deps="vaapi"
2177 h263_vaapi_hwaccel_select="h263_decoder"
2178 h264_cuvid_hwaccel_deps="cuvid CUVIDH264PICPARAMS"
2179 h264_cuvid_hwaccel_select="h264_decoder"
2180 h264_d3d11va_hwaccel_deps="d3d11va"
2181 h264_d3d11va_hwaccel_select="h264_decoder"
2182 h264_d3d11va2_hwaccel_deps="d3d11va"
2183 h264_d3d11va2_hwaccel_select="h264_decoder"
2184 h264_dxva2_hwaccel_deps="dxva2"
2185 h264_dxva2_hwaccel_select="h264_decoder"
2186 h264_mmal_hwaccel_deps="mmal"
2187 h264_qsv_hwaccel_deps="libmfx"
2188 h264_vaapi_hwaccel_deps="vaapi"
2189 h264_vaapi_hwaccel_select="h264_decoder"
2190 h264_vda_hwaccel_deps="vda"
2191 h264_vda_hwaccel_select="h264_decoder"
2192 h264_vda_old_hwaccel_deps="vda"
2193 h264_vda_old_hwaccel_select="h264_decoder"
2194 h264_vdpau_hwaccel_deps="vdpau"
2195 h264_vdpau_hwaccel_select="h264_decoder"
2196 hevc_cuvid_hwaccel_deps="cuvid CUVIDHEVCPICPARAMS"
2197 hevc_cuvid_hwaccel_select="hevc_decoder"
2198 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2199 hevc_d3d11va_hwaccel_select="hevc_decoder"
2200 hevc_d3d11va2_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2201 hevc_d3d11va2_hwaccel_select="hevc_decoder"
2202 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2203 hevc_dxva2_hwaccel_select="hevc_decoder"
2204 hevc_qsv_hwaccel_deps="libmfx"
2205 hevc_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferHEVC"
2206 hevc_vaapi_hwaccel_select="hevc_decoder"
2207 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2208 hevc_vdpau_hwaccel_select="hevc_decoder"
2209 mpeg1_vdpau_hwaccel_deps="vdpau"
2210 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2211 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2212 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2213 mpeg2_d3d11va2_hwaccel_deps="d3d11va"
2214 mpeg2_d3d11va2_hwaccel_select="mpeg2video_decoder"
2215 mpeg2_dxva2_hwaccel_deps="dxva2"
2216 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2217 mpeg2_mmal_hwaccel_deps="mmal"
2218 mpeg2_qsv_hwaccel_deps="libmfx"
2219 mpeg2_vaapi_hwaccel_deps="vaapi"
2220 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2221 mpeg2_vdpau_hwaccel_deps="vdpau"
2222 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2223 mpeg4_vaapi_hwaccel_deps="vaapi"
2224 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2225 mpeg4_vdpau_hwaccel_deps="vdpau"
2226 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2227 vc1_d3d11va_hwaccel_deps="d3d11va"
2228 vc1_d3d11va_hwaccel_select="vc1_decoder"
2229 vc1_d3d11va2_hwaccel_deps="d3d11va"
2230 vc1_d3d11va2_hwaccel_select="vc1_decoder"
2231 vc1_dxva2_hwaccel_deps="dxva2"
2232 vc1_dxva2_hwaccel_select="vc1_decoder"
2233 vc1_mmal_hwaccel_deps="mmal"
2234 vc1_qsv_hwaccel_deps="libmfx"
2235 vc1_vaapi_hwaccel_deps="vaapi"
2236 vc1_vaapi_hwaccel_select="vc1_decoder"
2237 vc1_vdpau_hwaccel_deps="vdpau"
2238 vc1_vdpau_hwaccel_select="vc1_decoder"
2239 vp8_qsv_hwaccel_deps="libmfx"
2240 vp8_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferVP8"
2241 vp8_vaapi_hwaccel_select="vp8_decoder"
2242 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2243 wmv3_d3d11va2_hwaccel_select="vc1_d3d11va2_hwaccel"
2244 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2245 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2246 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2247
2248 # hardware-accelerated codecs
2249 nvenc_deps_any="libdl LoadLibrary"
2250 omx_deps="libdl pthreads"
2251 omx_rpi_select="omx"
2252 qsv_deps="libmfx"
2253 qsvdec_select="qsv"
2254 qsvenc_select="qsv"
2255 qsvvpp_select="qsv"
2256 vaapi_encode_deps="vaapi"
2257
2258 hwupload_cuda_filter_deps="cuda"
2259 scale_npp_filter_deps="cuda libnpp"
2260
2261 h264_mmal_decoder_deps="mmal"
2262 h264_nvenc_encoder_deps="nvenc"
2263 h264_omx_encoder_deps="omx"
2264 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
2265 h264_qsv_encoder_select="qsvenc"
2266 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
2267 h264_vaapi_encoder_select="cbs_h264 vaapi_encode"
2268 hevc_nvenc_encoder_deps="nvenc"
2269 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser hevc_qsv_hwaccel qsvdec"
2270 hevc_qsv_encoder_select="hevcparse qsvenc"
2271 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
2272 hevc_vaapi_encoder_select="cbs_h265 vaapi_encode"
2273 mjpeg_qsv_encoder_deps="libmfx"
2274 mjpeg_qsv_encoder_select="qsvenc"
2275 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
2276 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
2277 mpeg2_mmal_decoder_deps="mmal"
2278 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2279 mpeg2_qsv_encoder_select="qsvenc"
2280 mpeg2_vaapi_encoder_deps="VAEncPictureParameterBufferMPEG2"
2281 mpeg2_vaapi_encoder_select="cbs_mpeg2 vaapi_encode"
2282 mpeg4_omx_encoder_deps="omx"
2283 vc1_mmal_decoder_deps="mmal"
2284 vc1_qsv_decoder_select="qsvdec vc1_qsv_hwaccel vc1_parser"
2285 vp8_qsv_decoder_select="qsvdec vp8_qsv_hwaccel vp8_parser"
2286 vp8_vaapi_encoder_deps="VAEncPictureParameterBufferVP8"
2287 vp8_vaapi_encoder_select="vaapi_encode"
2288 vp9_vaapi_encoder_deps="VAEncPictureParameterBufferVP9"
2289 vp9_vaapi_encoder_select="vaapi_encode"
2290
2291 nvenc_h264_encoder_select="h264_nvenc_encoder"
2292 nvenc_hevc_encoder_select="hevc_nvenc_encoder"
2293
2294 # parsers
2295 aac_parser_select="adts_header"
2296 h264_parser_select="golomb h264dsp h264parse"
2297 hevc_parser_select="hevcparse"
2298 mpegaudio_parser_select="mpegaudioheader"
2299 mpegvideo_parser_select="mpegvideo"
2300 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2301 vc1_parser_select="vc1dsp"
2302
2303 # bitstream_filters
2304 aac_adtstoasc_bsf_select="adts_header"
2305 h264_metadata_bsf_select="cbs_h264"
2306 h264_redundant_pps_bsf_select="cbs_h264"
2307 hevc_metadata_bsf_select="cbs_h265"
2308 mjpeg2jpeg_bsf_select="jpegtables"
2309 mpeg2_metadata_bsf_select="cbs_mpeg2"
2310 trace_headers_bsf_select="cbs_h264 cbs_h265 cbs_mpeg2"
2311
2312 # external libraries
2313 avisynth_deps="LoadLibrary"
2314 avxsynth_deps="libdl"
2315 avisynth_demuxer_deps_any="avisynth avxsynth"
2316 avisynth_demuxer_select="riffdec"
2317 libdcadec_decoder_deps="libdcadec"
2318 libfaac_encoder_deps="libfaac"
2319 libfaac_encoder_select="audio_frame_queue"
2320 libfdk_aac_decoder_deps="libfdk_aac"
2321 libfdk_aac_encoder_deps="libfdk_aac"
2322 libfdk_aac_encoder_select="audio_frame_queue"
2323 libgsm_decoder_deps="libgsm"
2324 libgsm_encoder_deps="libgsm"
2325 libgsm_ms_decoder_deps="libgsm"
2326 libgsm_ms_encoder_deps="libgsm"
2327 libilbc_decoder_deps="libilbc"
2328 libilbc_encoder_deps="libilbc"
2329 libkvazaar_encoder_deps="libkvazaar"
2330 libmp3lame_encoder_deps="libmp3lame"
2331 libmp3lame_encoder_select="audio_frame_queue mpegaudioheader"
2332 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2333 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2334 libopencore_amrnb_encoder_select="audio_frame_queue"
2335 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2336 libopenh264_decoder_deps="libopenh264"
2337 libopenh264_decoder_select="h264_mp4toannexb_bsf"
2338 libopenh264_encoder_deps="libopenh264"
2339 libopenjpeg_decoder_deps="libopenjpeg"
2340 libopenjpeg_encoder_deps="libopenjpeg"
2341 libopus_decoder_deps="libopus"
2342 libopus_encoder_deps="libopus"
2343 libopus_encoder_select="audio_frame_queue"
2344 libschroedinger_decoder_deps="libschroedinger"
2345 libschroedinger_encoder_deps="libschroedinger"
2346 libspeex_decoder_deps="libspeex"
2347 libspeex_encoder_deps="libspeex"
2348 libspeex_encoder_select="audio_frame_queue"
2349 libtheora_encoder_deps="libtheora"
2350 libtwolame_encoder_deps="libtwolame"
2351 libvo_aacenc_encoder_deps="libvo_aacenc"
2352 libvo_aacenc_encoder_select="audio_frame_queue"
2353 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2354 libvorbis_encoder_deps="libvorbis"
2355 libvorbis_encoder_select="audio_frame_queue"
2356 libvpx_vp8_decoder_deps="libvpx"
2357 libvpx_vp8_encoder_deps="libvpx"
2358 libvpx_vp9_decoder_deps="libvpx"
2359 libvpx_vp9_encoder_deps="libvpx"
2360 libwavpack_encoder_deps="libwavpack"
2361 libwavpack_encoder_select="audio_frame_queue"
2362 libwebp_encoder_deps="libwebp"
2363 libx262_encoder_deps="libx262"
2364 libx264_encoder_deps="libx264"
2365 libx265_encoder_deps="libx265"
2366 libxavs_encoder_deps="libxavs"
2367 libxvid_encoder_deps="libxvid mkstemp"
2368
2369 # demuxers / muxers
2370 ac3_demuxer_select="ac3_parser"
2371 asf_demuxer_select="riffdec"
2372 asf_muxer_select="riffenc"
2373 asf_stream_muxer_select="asf_muxer"
2374 avi_demuxer_select="iso_media riffdec"
2375 avi_muxer_select="riffenc"
2376 caf_demuxer_select="iso_media riffdec"
2377 dash_muxer_select="mp4_muxer"
2378 dirac_demuxer_select="dirac_parser"
2379 dv_demuxer_select="dvprofile"
2380 dv_muxer_select="dvprofile"
2381 dxa_demuxer_select="riffdec"
2382 eac3_demuxer_select="ac3_parser"
2383 f4v_muxer_select="mov_muxer"
2384 flac_demuxer_select="flac_parser"
2385 hds_muxer_select="flv_muxer"
2386 hls_muxer_select="mpegts_muxer"
2387 ipod_muxer_select="mov_muxer"
2388 ismv_muxer_select="mov_muxer"
2389 matroska_audio_muxer_select="matroska_muxer"
2390 matroska_demuxer_select="iso_media riffdec"
2391 matroska_demuxer_suggest="bzlib lzo zlib"
2392 matroska_muxer_select="iso_media riffenc"
2393 mmf_muxer_select="riffenc"
2394 mov_demuxer_select="iso_media riffdec"
2395 mov_demuxer_suggest="zlib"
2396 mov_muxer_select="iso_media riffenc rtpenc_chain"
2397 mp3_demuxer_select="mpegaudio_parser"
2398 mp3_muxer_select="mpegaudioheader"
2399 mp4_muxer_select="mov_muxer"
2400 mpegts_demuxer_select="iso_media"
2401 mpegts_muxer_select="adts_muxer latm_muxer"
2402 mpegtsraw_demuxer_select="mpegts_demuxer"
2403 mxf_d10_muxer_select="mxf_muxer"
2404 nut_muxer_select="riffenc"
2405 nuv_demuxer_select="riffdec"
2406 oga_muxer_select="ogg_muxer"
2407 ogg_demuxer_select="dirac_parse"
2408 opus_muxer_select="ogg_muxer"
2409 psp_muxer_select="mov_muxer"
2410 rtp_demuxer_select="sdp_demuxer"
2411 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2412 rtsp_demuxer_select="http_protocol rtpdec"
2413 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2414 sap_demuxer_select="sdp_demuxer"
2415 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2416 sdp_demuxer_select="rtpdec"
2417 smoothstreaming_muxer_select="ismv_muxer"
2418 spdif_demuxer_select="adts_header"
2419 spdif_muxer_select="adts_header"
2420 spx_muxer_select="ogg_muxer"
2421 swf_demuxer_suggest="zlib"
2422 tak_demuxer_select="tak_parser"
2423 tg2_muxer_select="mov_muxer"
2424 tgp_muxer_select="mov_muxer"
2425 w64_demuxer_select="wav_demuxer"
2426 wav_demuxer_select="riffdec"
2427 wav_muxer_select="riffenc"
2428 webm_muxer_select="iso_media riffenc"
2429 wtv_demuxer_select="mpegts_demuxer riffdec"
2430 xmv_demuxer_select="riffdec"
2431 xwma_demuxer_select="riffdec"
2432
2433 # indevs
2434 alsa_indev_deps="alsa"
2435 avfoundation_indev_deps="AVFoundation_AVFoundation_h objc_arc pthreads"
2436 avfoundation_indev_extralibs="-framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia"
2437 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2438 fbdev_indev_deps="linux_fb_h"
2439 jack_indev_deps="libjack"
2440 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
2441 libcdio_indev_deps="libcdio"
2442 libdc1394_indev_deps="libdc1394"
2443 oss_indev_deps_any="sys_soundcard_h"
2444 pulse_indev_deps="libpulse"
2445 sndio_indev_deps="sndio"
2446 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2447 vfwcap_indev_deps="vfw32 vfwcap_defines"
2448 xcbgrab_indev_deps="libxcb libxcb_shape"
2449 xcbgrab_indev_suggest="libxcb_shm libxcb_xfixes"
2450
2451 # protocols
2452 ffrtmpcrypt_protocol_conflict="librtmp_protocol"
2453 ffrtmpcrypt_protocol_deps_any="gmp openssl"
2454 ffrtmpcrypt_protocol_select="tcp_protocol"
2455 ffrtmphttp_protocol_conflict="librtmp_protocol"
2456 ffrtmphttp_protocol_select="http_protocol"
2457 gopher_protocol_select="network"
2458 http_protocol_select="tcp_protocol"
2459 http_protocol_suggest="zlib"
2460 httpproxy_protocol_select="tcp_protocol"
2461 httpproxy_protocol_suggest="zlib"
2462 https_protocol_select="tls_protocol"
2463 https_protocol_suggest="zlib"
2464 icecast_protocol_select="http_protocol"
2465 librtmp_protocol_deps="librtmp"
2466 librtmpe_protocol_deps="librtmp"
2467 librtmps_protocol_deps="librtmp"
2468 librtmpt_protocol_deps="librtmp"
2469 librtmpte_protocol_deps="librtmp"
2470 mmsh_protocol_select="http_protocol"
2471 mmst_protocol_select="network"
2472 rtmp_protocol_conflict="librtmp_protocol"
2473 rtmp_protocol_select="tcp_protocol"
2474 rtmp_protocol_suggest="zlib"
2475 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2476 rtmpe_protocol_suggest="zlib"
2477 rtmps_protocol_conflict="librtmp_protocol"
2478 rtmps_protocol_select="tls_protocol"
2479 rtmps_protocol_suggest="zlib"
2480 rtmpt_protocol_select="ffrtmphttp_protocol"
2481 rtmpt_protocol_suggest="zlib"
2482 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2483 rtmpte_protocol_suggest="zlib"
2484 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2485 rtmpts_protocol_suggest="zlib"
2486 rtp_protocol_select="udp_protocol"
2487 sctp_protocol_deps="struct_sctp_event_subscribe"
2488 sctp_protocol_select="network"
2489 srtp_protocol_select="rtp_protocol srtp"
2490 tcp_protocol_select="network"
2491 tls_protocol_deps_any="gnutls openssl"
2492 tls_protocol_select="tcp_protocol"
2493 udp_protocol_select="network"
2494 unix_protocol_deps="sys_un_h"
2495 unix_protocol_select="network"
2496
2497 # filters
2498 asyncts_filter_deps="avresample"
2499 blackframe_filter_deps="gpl"
2500 boxblur_filter_deps="gpl"
2501 bs2b_filter_deps="libbs2b"
2502 cropdetect_filter_deps="gpl"
2503 deinterlace_qsv_filter_deps="libmfx"
2504 deinterlace_vaapi_filter_deps="vaapi"
2505 delogo_filter_deps="gpl"
2506 drawtext_filter_deps="libfreetype"
2507 drawtext_filter_suggest="libfontconfig"
2508 frei0r_filter_deps="frei0r libdl"
2509 frei0r_src_filter_deps="frei0r libdl"
2510 hdcd_filter_deps="libhdcd"
2511 hqdn3d_filter_deps="gpl"
2512 interlace_filter_deps="gpl"
2513 movie_filter_deps="avcodec avformat"
2514 ocv_filter_deps="libopencv"
2515 overlay_qsv_filter_deps="libmfx"
2516 overlay_qsv_filter_select="qsvvpp"
2517 resample_filter_deps="avresample"
2518 scale_filter_deps="swscale"
2519 scale_qsv_filter_deps="libmfx"
2520 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2521 vpp_qsv_filter_deps="libmfx"
2522 vpp_qsv_filter_select="qsvvpp"
2523
2524 # examples
2525 decode_audio_example_deps="avcodec avutil"
2526 decode_video_example_deps="avcodec avutil"
2527 encode_audio_example_deps="avcodec avutil"
2528 encode_video_example_deps="avcodec avutil"
2529 filter_audio_example_deps="avfilter avutil"
2530 metadata_example_deps="avformat avutil"
2531 output_example_deps="avcodec avformat avresample avutil swscale"
2532 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder"
2533 transcode_aac_example_deps="avcodec avformat avresample"
2534
2535 # EXTRALIBS_LIST
2536 cpu_init_extralibs="pthreads_extralibs"
2537 cws2fws_extralibs="zlib_extralibs"
2538
2539 # libraries, in linking order
2540 avcodec_deps="avutil"
2541 avcodec_select="null_bsf"
2542 avdevice_deps="avformat avcodec avutil"
2543 avfilter_deps="avutil"
2544 avformat_deps="avcodec avutil"
2545 avformat_suggest="network"
2546 avresample_deps="avutil"
2547 swscale_deps="avutil"
2548
2549 avcodec_extralibs="pthreads_extralibs libm_extralibs"
2550 avdevice_extralibs="libm_extralibs"
2551 avformat_extralibs="libm_extralibs"
2552 avfilter_extralibs="pthreads_extralibs libm_extralibs"
2553 avresample_extralibs="libm_extralibs"
2554 avutil_extralibs="clock_gettime_extralibs cuda_extralibs cuvid_extralibs d3d11va_extralibs libm_extralibs libmfx_extralibs nanosleep_extralibs pthreads_extralibs user32_extralibs vaapi_extralibs vaapi_drm_extralibs vaapi_x11_extralibs vdpau_x11_extralibs wincrypt_extralibs"
2555 swscale_extralibs="libm_extralibs"
2556
2557 # programs
2558 avconv_deps="avcodec avfilter avformat avresample swscale"
2559 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2560                fps_filter null_filter resample_filter scale_filter
2561                trim_filter"
2562 avconv_suggest="psapi shell32"
2563 avplay_deps="avcodec avfilter avformat avresample sdl"
2564 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2565 avplay_suggest="shell32"
2566 avprobe_deps="avcodec avformat"
2567 avprobe_suggest="shell32"
2568
2569 # documentation
2570 pod2man_deps="doc"
2571 texi2html_deps="doc"
2572
2573 # default parameters
2574
2575 logfile="avbuild/config.log"
2576
2577 # installation paths
2578 prefix_default="/usr/local"
2579 bindir_default='${prefix}/bin'
2580 datadir_default='${prefix}/share/avconv'
2581 docdir_default='${prefix}/share/doc/libav'
2582 incdir_default='${prefix}/include'
2583 libdir_default='${prefix}/lib'
2584 mandir_default='${prefix}/share/man'
2585 shlibdir_default="$libdir_default"
2586
2587 # toolchain
2588 ar_default="ar"
2589 cc_default="gcc"
2590 host_cc_default="gcc"
2591 x86asmexe_default="nasm"
2592 ln_s="ln -s -f"
2593 nm_default="nm -g"
2594 pkg_config_default=pkg-config
2595 ranlib="ranlib"
2596 strip="strip"
2597 version_script='--version-script'
2598
2599 # machine
2600 arch_default=$(uname -m)
2601 cpu="generic"
2602 intrinsics="none"
2603
2604 # OS
2605 target_os_default=$(tolower $(uname -s))
2606 host_os=$target_os_default
2607
2608 # configurable options
2609 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2610
2611 enable asm
2612 enable debug
2613 enable doc
2614 enable faan faandct faanidct
2615 enable optimizations
2616 enable safe_bitstream_reader
2617 enable static
2618 enable swscale_alpha
2619 enable valgrind_backtrace
2620
2621 # By default, enable only those hwaccels that have no external dependencies.
2622 enable d3d11va dxva2 vda vdpau
2623
2624 # internal components are enabled by default
2625 enable $EXTRALIBS_LIST
2626
2627 # Avoid external, non-system, libraries getting enabled by dependency resolution
2628 disable $EXTERNAL_LIBRARY_LIST
2629
2630 # build settings
2631 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2632 LIBPREF="lib"
2633 LIBSUF=".a"
2634 LIBNAME='$(LIBPREF)$(NAME)$(LIBSUF)'
2635 SLIBPREF="lib"
2636 SLIBSUF=".so"
2637 SLIBNAME='$(SLIBPREF)$(NAME)$(SLIBSUF)'
2638 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2639 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2640 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2641 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2642 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2643 VERSION_SCRIPT_POSTPROCESS_CMD="cat"
2644
2645 asflags_filter=echo
2646 cflags_filter=echo
2647 ldflags_filter=echo
2648
2649 AS_C='-c'
2650 AS_O='-o $@'
2651 CC_C='-c'
2652 CC_E='-E -o $@'
2653 CC_O='-o $@'
2654 OBJCC_C='-c'
2655 OBJCC_E='-E -o $@'
2656 OBJCC_O='-o $@'
2657 X86ASM_O='-o $@'
2658 LD_O='-o $@'
2659 LD_LIB='-l%'
2660 LD_PATH='-L'
2661 HOSTCC_C='-c'
2662 HOSTCC_E='-E -o $@'
2663 HOSTCC_O='-o $@'
2664 HOSTLD_O='-o $@'
2665
2666 host_extralibs='-lm'
2667 host_cflags_filter=echo
2668 host_ldflags_filter=echo
2669
2670 target_path='$(CURDIR)'
2671
2672 # since the object filename is not given with the -MM flag, the compiler
2673 # is only able to print the basename, and we must add the path ourselves
2674 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2675 DEPFLAGS='-MM'
2676
2677 mkdir -p avbuild
2678
2679 # find source path
2680 if test -f configure; then
2681     source_path=.
2682 else
2683     source_path=$(cd $(dirname "$0"); pwd)
2684     echo "$source_path" | grep -q '[[:blank:]]' &&
2685         die "Out of tree builds are impossible with whitespace in source path."
2686     test -e "$source_path/config.h" &&
2687         die "Out of tree builds are impossible with config.h in source dir."
2688 fi
2689
2690 for v in "$@"; do
2691     r=${v#*=}
2692     l=${v%"$r"}
2693     r=$(sh_quote "$r")
2694     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2695 done
2696
2697 find_things(){
2698     thing=$1
2699     pattern=$2
2700     file=$source_path/$3
2701     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2702 }
2703
2704 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2705 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2706 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2707 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2708 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2709 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2710 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2711 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2712
2713 find_things_extern(){
2714     thing=$1
2715     pattern=$2
2716     file=$source_path/$3
2717     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2718 }
2719
2720 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2721 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2722
2723 AVCODEC_COMPONENTS_LIST="
2724     $BSF_LIST
2725     $DECODER_LIST
2726     $ENCODER_LIST
2727     $HWACCEL_LIST
2728     $PARSER_LIST
2729 "
2730
2731 AVDEVICE_COMPONENTS_LIST="
2732     $INDEV_LIST
2733 "
2734
2735 AVFILTER_COMPONENTS_LIST="
2736     $FILTER_LIST
2737 "
2738
2739 AVFORMAT_COMPONENTS_LIST="
2740     $DEMUXER_LIST
2741     $MUXER_LIST
2742     $PROTOCOL_LIST
2743 "
2744
2745 ALL_COMPONENTS="
2746     $AVCODEC_COMPONENTS_LIST
2747     $AVDEVICE_COMPONENTS_LIST
2748     $AVFILTER_COMPONENTS_LIST
2749     $AVFORMAT_COMPONENTS_LIST
2750 "
2751
2752 for n in $COMPONENT_LIST; do
2753     v=$(toupper ${n%s})_LIST
2754     eval enable \$$v
2755     eval ${n}_if_any="\$$v"
2756 done
2757
2758 enable $ARCH_EXT_LIST
2759
2760 die_unknown(){
2761     echo "Unknown option \"$1\"."
2762     echo "See $0 --help for available options."
2763     exit 1
2764 }
2765
2766 print_3_columns() {
2767     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2768 }
2769
2770 show_list() {
2771     suffix=_$1
2772     shift
2773     echo $* | sed s/$suffix//g | print_3_columns
2774     exit 0
2775 }
2776
2777 for opt do
2778     optval="${opt#*=}"
2779     case "$opt" in
2780         --extra-ldflags=*)
2781             add_ldflags $optval
2782         ;;
2783         --extra-ldexeflags=*)
2784             add_ldexeflags $optval
2785         ;;
2786         --extra-ldsoflags=*)
2787             add_ldsoflags $optval
2788         ;;
2789         --extra-libs=*)
2790             add_extralibs $optval
2791         ;;
2792         --disable-devices)
2793             disable $INDEV_LIST
2794         ;;
2795         --enable-debug=*)
2796             debuglevel="$optval"
2797         ;;
2798         --disable-programs)
2799             disable $PROGRAM_LIST
2800         ;;
2801         --disable-everything)
2802             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2803         ;;
2804         --disable-all)
2805             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2806             disable $LIBRARY_LIST $PROGRAM_LIST doc
2807         ;;
2808         --enable-*=*|--disable-*=*)
2809             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2810             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2811             eval list=\$$(toupper $thing)_LIST
2812             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2813             $action $(filter "$name" $list)
2814         ;;
2815         --enable-yasm|--disable-yasm)
2816             warn "The ${opt} option is only provided for compatibility and will be\n"\
2817                  "removed in the future. Use --enable-x86asm / --disable-x86asm instead."
2818             test $opt = --enable-yasm && x86asm=yes || x86asm=no
2819         ;;
2820         --enable-?*|--disable-?*)
2821             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2822             if is_in $option $COMPONENT_LIST; then
2823                 test $action = disable && action=unset
2824                 eval $action \$$(toupper ${option%s})_LIST
2825             elif is_in $option $CMDLINE_SELECT; then
2826                 $action $option
2827             else
2828                 die_unknown $opt
2829             fi
2830         ;;
2831         --list-*)
2832             NAME="${opt#--list-}"
2833             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2834             NAME=${NAME%s}
2835             eval show_list $NAME \$$(toupper $NAME)_LIST
2836         ;;
2837         --help|-h) show_help
2838         ;;
2839         --quiet|-q) quiet=yes
2840         ;;
2841         *)
2842             optname="${opt%%=*}"
2843             optname="${optname#--}"
2844             optname=$(echo "$optname" | sed 's/-/_/g')
2845             if is_in $optname $CMDLINE_SET; then
2846                 eval $optname='$optval'
2847             elif is_in $optname $CMDLINE_APPEND; then
2848                 append $optname "$optval"
2849             else
2850                 die_unknown $opt
2851             fi
2852         ;;
2853     esac
2854 done
2855
2856 for e in $env; do
2857     eval "export $e"
2858 done
2859
2860 disabled logging && logfile=/dev/null
2861
2862 # command line configuration sanity checks
2863
2864 # we need to build at least one lib type
2865 if ! enabled_any static shared; then
2866     cat <<EOF
2867 At least one library type must be built.
2868 Specify --enable-static to build the static libraries or --enable-shared to
2869 build the shared libraries as well. To only build the shared libraries specify
2870 --disable-static in addition to --enable-shared.
2871 EOF
2872     exit 1
2873 fi
2874
2875 # Die early if licensing-related configure options are incompatible.
2876 die_license_disabled() {
2877     enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
2878 }
2879
2880 map "die_license_disabled gpl"      $EXTERNAL_LIBRARY_GPL_LIST
2881 map "die_license_disabled nonfree"  $EXTERNAL_LIBRARY_NONFREE_LIST $HWACCEL_LIBRARY_NONFREE_LIST
2882 map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST
2883
2884 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
2885
2886 enabled_all gnutls openssl &&
2887     die "GnuTLS and OpenSSL must not be enabled at the same time."
2888
2889 # Disable all the library-specific components if the library itself
2890 # is disabled, see AVCODEC_LIST and following _LIST variables.
2891
2892 disable_components(){
2893     disabled ${1} && disable $(
2894         eval components="\$$(toupper ${1})_COMPONENTS"
2895         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2896     )
2897 }
2898
2899 map 'disable_components $v' $LIBRARY_LIST
2900
2901 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2902 set >> $logfile
2903
2904 case "$toolchain" in
2905     *-asan)
2906         cc_default="${toolchain%-asan}"
2907         add_cflags  -fsanitize=address
2908         add_ldflags -fsanitize=address
2909     ;;
2910     *-msan)
2911         cc_default="${toolchain%-msan}"
2912         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2913         add_ldflags -fsanitize=memory
2914     ;;
2915     *-tsan)
2916         cc_default="${toolchain%-tsan}"
2917         add_cflags  -fsanitize=thread -fPIE
2918         add_ldflags -fsanitize=thread -pie
2919         case "$toolchain" in
2920             gcc-tsan)
2921                 add_cflags  -fPIC
2922                 add_ldflags -fPIC
2923                 ;;
2924         esac
2925     ;;
2926     *-usan)
2927         cc_default="${toolchain%-usan}"
2928         add_cflags  -fsanitize=undefined
2929         add_ldflags -fsanitize=undefined
2930         case "$toolchain" in
2931             clang-usan)
2932                 add_cflags -O1
2933                 ;;
2934         esac
2935     ;;
2936     valgrind-*)
2937         target_exec_default="valgrind"
2938         case "$toolchain" in
2939             valgrind-massif)
2940                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2941                 ;;
2942             valgrind-memcheck)
2943                 target_exec_args="--track-origins=yes --leak-check=full"
2944                 ;;
2945         esac
2946     ;;
2947     msvc)
2948         # Check whether the current MSVC version needs the C99 converter.
2949         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2950         # support enough of C99 to build libav. Default to the new
2951         # behaviour if the regexp was unable to match anything, since this
2952         # successfully parses the version number of existing supported
2953         # versions that require the converter (MSVC 2010 and 2012).
2954         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2955         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2956             cc_default="cl"
2957         else
2958             cc_default="c99wrap cl"
2959         fi
2960         ld_default="$source_path/compat/windows/mslink"
2961         nm_default="dumpbin -symbols"
2962         ar_default="lib"
2963         case "$arch" in
2964         aarch64|arm64)
2965             as_default="armasm64"
2966             ;;
2967         arm*)
2968             as_default="armasm"
2969             ;;
2970         esac
2971         target_os_default="win32"
2972         # Use a relative path for TMPDIR. This makes sure all the
2973         # ffconf temp files are written with a relative path, avoiding
2974         # issues with msys/win32 path conversion for MSVC parameters
2975         # such as -Fo<file> or -out:<file>.
2976         TMPDIR=.
2977     ;;
2978     icl)
2979         cc_default="icl"
2980         ld_default="xilink"
2981         nm_default="dumpbin -symbols"
2982         ar_default="xilib"
2983         target_os_default="win32"
2984         TMPDIR=.
2985     ;;
2986     gcov)
2987         add_cflags  -fprofile-arcs -ftest-coverage
2988         add_ldflags -fprofile-arcs -ftest-coverage
2989     ;;
2990     llvm-cov)
2991         add_cflags -fprofile-arcs -ftest-coverage
2992         add_ldflags --coverage
2993     ;;
2994     hardened)
2995         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2996         add_cflags   -fno-strict-overflow -fstack-protector-all
2997         add_ldflags  -Wl,-z,relro -Wl,-z,now
2998     ;;
2999     ?*)
3000         die "Unknown toolchain $toolchain"
3001     ;;
3002 esac
3003
3004 if test -n "$cross_prefix"; then
3005     test -n "$arch" && test -n "$target_os" ||
3006         die "Must specify target arch (--arch) and OS (--target-os) when cross-compiling"
3007     enable cross_compile
3008 fi
3009
3010 ar_default="${cross_prefix}${ar_default}"
3011 cc_default="${cross_prefix}${cc_default}"
3012 objcc_default="${cross_prefix}${objcc_default}"
3013 x86asmexe_default="${cross_prefix}${x86asmexe_default}"
3014 nm_default="${cross_prefix}${nm_default}"
3015 pkg_config_default="${cross_prefix}${pkg_config_default}"
3016 ranlib="${cross_prefix}${ranlib}"
3017 strip="${cross_prefix}${strip}"
3018
3019 sysinclude_default="${sysroot}/usr/include"
3020
3021 set_default arch cc pkg_config sysinclude target_exec target_os x86asmexe
3022 enabled cross_compile || host_cc_default=$cc
3023 set_default host_cc
3024
3025 if ! $pkg_config --version >/dev/null 2>&1; then
3026     warn "$pkg_config not found, library detection may fail."
3027     pkg_config=false
3028 fi
3029
3030 exesuf() {
3031     case $1 in
3032         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
3033     esac
3034 }
3035
3036 EXESUF=$(exesuf $target_os)
3037 HOSTEXESUF=$(exesuf $host_os)
3038
3039 # set temporary file name
3040 : ${TMPDIR:=$TEMPDIR}
3041 : ${TMPDIR:=$TMP}
3042 : ${TMPDIR:=/tmp}
3043
3044 if ! check_cmd mktemp -u XXXXXX; then
3045     # simple replacement for missing mktemp
3046     # NOT SAFE FOR GENERAL USE
3047     mktemp(){
3048         tmpname="${2%%XXX*}.${HOSTNAME}.${UID}.$$"
3049         echo "$tmpname"
3050         mkdir "$tmpname"
3051     }
3052 fi
3053
3054 AVTMPDIR=$(mktemp -d "${TMPDIR}/avconf.XXXXXXXX" 2> /dev/null) ||
3055     die "Unable to create temporary directory in $TMPDIR."
3056
3057 tmpfile(){
3058     tmp="${AVTMPDIR}/test"$2
3059     (set -C; exec > $tmp) 2> /dev/null ||
3060         die "Unable to create temporary file in $AVTMPDIR."
3061     eval $1=$tmp
3062 }
3063
3064 trap 'rm -rf -- "$AVTMPDIR"' EXIT
3065 trap 'exit 2' INT
3066
3067 tmpfile TMPASM .asm
3068 tmpfile TMPC   .c
3069 tmpfile TMPE   $EXESUF
3070 tmpfile TMPH   .h
3071 tmpfile TMPO   .o
3072 tmpfile TMPS   .S
3073 tmpfile TMPSH  .sh
3074 tmpfile TMPV   .ver
3075
3076 unset -f mktemp
3077
3078 chmod +x $TMPE
3079
3080 # make sure we can execute files in $TMPDIR
3081 cat > $TMPSH 2>> $logfile <<EOF
3082 #! /bin/sh
3083 EOF
3084 chmod +x $TMPSH >> $logfile 2>&1
3085 if ! $TMPSH >> $logfile 2>&1; then
3086     cat <<EOF
3087 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
3088 variable to another directory and make sure that it is not mounted noexec.
3089 EOF
3090     die "Sanity test failed."
3091 fi
3092
3093 armasm_flags(){
3094     for flag; do
3095         case $flag in
3096             # Filter out MSVC cl.exe options from cflags that shouldn't
3097             # be passed to gas-preprocessor
3098             -M[TD]*)                                            ;;
3099             *)                  echo $flag                      ;;
3100         esac
3101    done
3102 }
3103
3104 cparser_flags(){
3105     for flag; do
3106         case $flag in
3107             -Wno-switch)             echo -Wno-switch-enum ;;
3108             -Wno-format-zero-length) ;;
3109             -Wdisabled-optimization) ;;
3110             -Wno-pointer-sign)       echo -Wno-other ;;
3111             *)                       echo $flag ;;
3112         esac
3113     done
3114 }
3115
3116 msvc_common_flags(){
3117     for flag; do
3118         case $flag in
3119             # In addition to specifying certain flags under the compiler
3120             # specific filters, they must be specified here as well or else the
3121             # generic catch all at the bottom will print the original flag.
3122             -Wall)                ;;
3123             -Wextra)              ;;
3124             -std=c99)             ;;
3125             # Common flags
3126             -fomit-frame-pointer) ;;
3127             -g)                   echo -Z7 ;;
3128             -fno-math-errno)      ;;
3129             -fno-common)          ;;
3130             -fno-signed-zeros)    ;;
3131             -fPIC)                ;;
3132             -mthumb)              ;;
3133             -march=*)             ;;
3134             -lz)                  echo zlib.lib ;;
3135             -lx264)               echo libx264.lib ;;
3136             -l*)                  echo ${flag#-l}.lib ;;
3137             -L*)                  echo -libpath:${flag#-L} ;;
3138             *)                    echo $flag ;;
3139         esac
3140     done
3141 }
3142
3143 msvc_flags(){
3144     msvc_common_flags "$@"
3145     for flag; do
3146         case $flag in
3147             -Wall)                echo -W3 -wd4018 -wd4146 -wd4244 -wd4305     \
3148                                        -wd4554 ;;
3149             -Wextra)              echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3150                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3151                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3152                                        -wd4273 -wd4554 -wd4701 -wd4703 ;;
3153         esac
3154     done
3155 }
3156
3157 icl_flags(){
3158     msvc_common_flags "$@"
3159     for flag; do
3160         case $flag in
3161             # Despite what Intel's documentation says -Wall, which is supported
3162             # on Windows, does enable remarks so disable them here.
3163             -Wall)                echo $flag -Qdiag-disable:remark ;;
3164             -std=c99)             echo -Qstd=c99 ;;
3165         esac
3166     done
3167 }
3168
3169 suncc_flags(){
3170     for flag; do
3171         case $flag in
3172             -march=*|-mcpu=*)
3173                 case "${flag#*=}" in
3174                     native)                   echo -xtarget=native       ;;
3175                     v9|niagara)               echo -xarch=sparc          ;;
3176                     ultrasparc)               echo -xarch=sparcvis       ;;
3177                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3178                     i586|pentium)             echo -xchip=pentium        ;;
3179                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3180                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3181                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3182                     pentium4*)          echo -xtarget=pentium4           ;;
3183                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3184                     *-sse3)             echo -xarch=sse3                 ;;
3185                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3186                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3187                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3188                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3189                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3190                     k8|opteron|athlon64|athlon-fx)
3191                                                echo -xarch=sse2a         ;;
3192                     athlon*)                   echo -xarch=pentium_proa  ;;
3193                 esac
3194                 ;;
3195             -std=c99)             echo -xc99              ;;
3196             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3197             -fPIC)                echo -KPIC -xcode=pic32 ;;
3198             -W*,*)                echo $flag              ;;
3199             -f*-*|-W*|-mimpure-text)                      ;;
3200             -shared)              echo -G                 ;;
3201             *)                    echo $flag              ;;
3202         esac
3203     done
3204 }
3205
3206 probe_cc(){
3207     pfx=$1
3208     _cc=$2
3209
3210     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3211     unset _ld_o _ldflags _ld_lib _ld_path
3212     unset _depflags _DEPCMD _DEPFLAGS
3213     _flags_filter=echo
3214
3215     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3216         _type=llvm_gcc
3217         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3218         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3219         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3220         _cflags_speed='-O3'
3221         _cflags_size='-Os'
3222     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3223         _type=gcc
3224         gcc_version=$($_cc --version | head -n1)
3225         gcc_basever=$($_cc -dumpversion)
3226         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3227         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3228         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3229         if ! $_cc -dumpversion | grep -q '^2\.'; then
3230             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3231         fi
3232         _cflags_speed='-O3'
3233         _cflags_size='-Os'
3234     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3235         _type=icc
3236         _ident=$($_cc --version | head -n1)
3237         _depflags='-MMD'
3238         _cflags_speed='-O3'
3239         _cflags_size='-Os'
3240         _cflags_noopt='-O1'
3241     elif $_cc -v 2>&1 | grep -q xlc; then
3242         _type=xlc
3243         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3244         _cflags_speed='-O5'
3245         _cflags_size='-O5 -qcompact'
3246     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3247         test -d "$sysroot" || die "No valid sysroot specified."
3248         _type=armcc
3249         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3250         armcc_conf="$PWD/armcc.conf"
3251         $_cc --arm_linux_configure                 \
3252              --arm_linux_config_file="$armcc_conf" \
3253              --configure_sysroot="$sysroot"        \
3254              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3255              die "Error creating armcc configuration file."
3256         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3257         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3258         as_default="${cross_prefix}gcc"
3259         _depflags='-MMD'
3260         _cflags_speed='-O3'
3261         _cflags_size='-Os'
3262     elif $_cc -v 2>&1 | grep -q clang; then
3263         _type=clang
3264         _ident=$($_cc --version 2>/dev/null | head -n1)
3265         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3266         _cflags_speed='-O3'
3267         _cflags_size='-Os'
3268     elif $_cc -V 2>&1 | grep -q Sun; then
3269         _type=suncc
3270         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3271         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3272         _DEPFLAGS='-xM1 -xc99'
3273         _ldflags='-std=c99'
3274         _cflags_speed='-O5'
3275         _cflags_size='-O5 -xspace'
3276         _flags_filter=suncc_flags
3277     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3278         _type=pathscale
3279         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3280         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3281         _cflags_speed='-O2'
3282         _cflags_size='-Os'
3283         _flags_filter='filter_out -Wdisabled-optimization'
3284     elif $_cc -v 2>&1 | grep -q Open64; then
3285         _type=open64
3286         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3287         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3288         _cflags_speed='-O2'
3289         _cflags_size='-Os'
3290         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3291     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3292         _type=armasm
3293         _ident=$($_cc | head -n1)
3294         # 4509: "This form of conditional instruction is deprecated"
3295         _flags="-nologo -ignore 4509"
3296         _flags_filter=armasm_flags
3297     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3298         _type=msvc
3299         _ident=$($_cc 2>&1 | head -n1)
3300         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3301         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3302         _cflags_speed="-O2"
3303         _cflags_size="-O1"
3304         _cflags_noopt="-O1"
3305         if $_cc -nologo- 2>&1 | grep -q Linker; then
3306             _ld_o='-out:$@'
3307         else
3308             _ld_o='-Fe$@'
3309         fi
3310         _cc_o='-Fo$@'
3311         _cc_e='-P -Fi$@'
3312         _flags_filter=msvc_flags
3313         _ld_lib='lib%.a'
3314         _ld_path='-libpath:'
3315         _flags='-nologo'
3316     elif $_cc 2>&1 | grep -q Intel; then
3317         _type=icl
3318         _ident=$($_cc 2>&1 | head -n1)
3319         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3320         # Not only is O3 broken on 13.x+ but it is slower on all previous
3321         # versions (tested) as well.
3322         _cflags_speed="-O2"
3323         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3324         if $_cc 2>&1 | grep -q Linker; then
3325             _ld_o='-out:$@'
3326         else
3327             _ld_o='-Fe$@'
3328         fi
3329         _cc_o='-Fo$@'
3330         _cc_e='-P'
3331         _flags_filter=icl_flags
3332         _ld_lib='lib%.a'
3333         _ld_path='-libpath:'
3334         # -Qdiag-error to make icl error when seeing certain unknown arguments
3335         _flags='-nologo -Qdiag-error:4044,10157'
3336         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3337         # with MSVC which enables it by default.
3338         _cflags='-Qms0 -Qvec- -Qsimd- -GS'
3339     elif $_cc -? 2>/dev/null | grep -q 'LLVM.*Linker'; then
3340         # lld can emulate multiple different linkers; in ms link.exe mode,
3341         # the -? parameter gives the help output which contains an identifyable
3342         # string, while it gives an error in other modes.
3343         _type=lld-link
3344         # The link.exe mode doesn't have a switch for getting the version,
3345         # but we can force it back to gnu mode and get the version from there.
3346         _ident=$($_cc -flavor gnu --version 2>/dev/null)
3347         _ld_o='-out:$@'
3348         _flags_filter=msvc_flags
3349         _ld_lib='lib%.a'
3350         _ld_path='-libpath:'
3351     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3352         _type=cparser
3353         _ident=$($_cc --version | head -n1)
3354         _depflags='-MMD'
3355         _cflags_speed='-O4'
3356         _cflags_size='-O2'
3357         _flags_filter=cparser_flags
3358     fi
3359
3360     eval ${pfx}_type=\$_type
3361     eval ${pfx}_ident=\$_ident
3362 }
3363
3364 set_ccvars(){
3365     eval ${1}_C=\${_cc_c-\${${1}_C}}
3366     eval ${1}_E=\${_cc_e-\${${1}_E}}
3367     eval ${1}_O=\${_cc_o-\${${1}_O}}
3368
3369     if [ -n "$_depflags" ]; then
3370         eval ${1}_DEPFLAGS=\$_depflags
3371     else
3372         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3373         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3374         eval DEP${1}FLAGS=\$_flags
3375     fi
3376 }
3377
3378 probe_cc cc "$cc"
3379 cflags_filter=$_flags_filter
3380 cflags_speed=$_cflags_speed
3381 cflags_size=$_cflags_size
3382 cflags_noopt=$_cflags_noopt
3383 add_cflags $_flags $_cflags
3384 cc_ldflags=$_ldflags
3385 set_ccvars CC
3386
3387 probe_cc hostcc "$host_cc"
3388 host_cflags_filter=$_flags_filter
3389 host_cflags_speed=$_cflags_speed
3390 add_host_cflags  $_flags $_cflags
3391 set_ccvars HOSTCC
3392
3393 test -n "$cc_type" && enable $cc_type ||
3394     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3395
3396 : ${as_default:=$cc}
3397 : ${objcc_default:=$cc}
3398 : ${dep_cc_default:=$cc}
3399 : ${ld_default:=$cc}
3400 : ${host_ld_default:=$host_cc}
3401 set_default ar as objcc dep_cc ld host_ld
3402
3403 probe_cc as "$as"
3404 asflags_filter=$_flags_filter
3405 add_asflags $_flags $_cflags
3406 set_ccvars AS
3407
3408 probe_cc objcc "$objcc"
3409 objcflags_filter=$_flags_filter
3410 add_objcflags $_flags $_cflags
3411 set_ccvars OBJC
3412
3413 probe_cc ld "$ld"
3414 ldflags_filter=$_flags_filter
3415 add_ldflags $_flags $_ldflags
3416 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3417 LD_O=${_ld_o-$LD_O}
3418 LD_LIB=${_ld_lib-$LD_LIB}
3419 LD_PATH=${_ld_path-$LD_PATH}
3420
3421 probe_cc hostld "$host_ld"
3422 host_ldflags_filter=$_flags_filter
3423 add_host_ldflags $_flags $_ldflags
3424 HOSTLD_O=${_ld_o-$HOSTLD_O}
3425
3426 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3427     probe_cc depcc "$dep_cc"
3428     CCDEP=${_DEPCMD:-$DEPCMD}
3429     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3430     DEPCCFLAGS=$_flags
3431 fi
3432
3433 if $ar 2>&1 | grep -q Microsoft; then
3434     arflags="-nologo"
3435     ar_o='-out:$@'
3436 else
3437     arflags="rc"
3438     ar_o='$@'
3439 fi
3440
3441 add_cflags $extra_cflags
3442 add_objcflags $extra_objcflags
3443 add_asflags $extra_cflags
3444
3445 if test -n "$sysroot"; then
3446     case "$cc_type" in
3447         gcc|llvm_gcc|clang)
3448             add_cppflags --sysroot="$sysroot"
3449             add_ldflags --sysroot="$sysroot"
3450         ;;
3451     esac
3452 fi
3453
3454 if test "$cpu" = host; then
3455     enabled cross_compile &&
3456         die "--cpu=host makes no sense when cross-compiling."
3457
3458     case "$cc_type" in
3459         gcc|llvm_gcc)
3460             check_native(){
3461                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3462                 sed -n "/cc1.*$1=/{
3463                             s/.*$1=\\([^ ]*\\).*/\\1/
3464                             p
3465                             q
3466                         }" $TMPE
3467             }
3468             cpu=$(check_native -march || check_native -mcpu)
3469         ;;
3470     esac
3471
3472     test "${cpu:-host}" = host &&
3473         die "--cpu=host not supported with compiler $cc"
3474 fi
3475
3476 # Deal with common $arch aliases
3477 case "$arch" in
3478     aarch64|arm64)
3479         arch="aarch64"
3480     ;;
3481     arm*)
3482         arch="arm"
3483     ;;
3484     mips*|IP*)
3485         case "$arch" in
3486         *el)
3487             add_cppflags -EL
3488             add_ldflags -EL
3489         ;;
3490         *eb)
3491             add_cppflags -EB
3492             add_ldflags -EB
3493         ;;
3494         esac
3495         arch="mips"
3496     ;;
3497     parisc*|hppa*)
3498         arch="parisc"
3499     ;;
3500     "Power Macintosh"|ppc*|powerpc*)
3501         arch="ppc"
3502     ;;
3503     s390|s390x)
3504         arch="s390"
3505     ;;
3506     sh4|sh)
3507         arch="sh4"
3508     ;;
3509     sun4u|sparc*)
3510         arch="sparc"
3511     ;;
3512     tilegx|tile-gx)
3513         arch="tilegx"
3514     ;;
3515     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3516         arch="x86"
3517     ;;
3518 esac
3519
3520 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3521 enable $arch
3522
3523 # Add processor-specific flags
3524 if enabled aarch64; then
3525
3526     case $cpu in
3527         armv*)
3528             cpuflags="-march=$cpu"
3529         ;;
3530         *)
3531             cpuflags="-mcpu=$cpu"
3532         ;;
3533     esac
3534
3535 elif enabled alpha; then
3536
3537     cpuflags="-mcpu=$cpu"
3538
3539 elif enabled arm; then
3540
3541     check_arm_arch() {
3542         check_cpp_condition stddef.h \
3543             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3544             $cpuflags
3545     }
3546
3547     probe_arm_arch() {
3548         if   check_arm_arch 4;        then echo armv4
3549         elif check_arm_arch 4T;       then echo armv4t
3550         elif check_arm_arch 5;        then echo armv5
3551         elif check_arm_arch 5E;       then echo armv5e
3552         elif check_arm_arch 5T;       then echo armv5t
3553         elif check_arm_arch 5TE;      then echo armv5te
3554         elif check_arm_arch 5TEJ;     then echo armv5te
3555         elif check_arm_arch 6;        then echo armv6
3556         elif check_arm_arch 6J;       then echo armv6j
3557         elif check_arm_arch 6K;       then echo armv6k
3558         elif check_arm_arch 6Z;       then echo armv6z
3559         elif check_arm_arch 6ZK;      then echo armv6zk
3560         elif check_arm_arch 6T2;      then echo armv6t2
3561         elif check_arm_arch 7;        then echo armv7
3562         elif check_arm_arch 7A  7_A;  then echo armv7-a
3563         elif check_arm_arch 7S;       then echo armv7-a
3564         elif check_arm_arch 7R  7_R;  then echo armv7-r
3565         elif check_arm_arch 7M  7_M;  then echo armv7-m
3566         elif check_arm_arch 7EM 7E_M; then echo armv7-m
3567         elif check_arm_arch 8A  8_A;  then echo armv8-a
3568         fi
3569     }
3570
3571     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3572
3573     case $cpu in
3574         armv*)
3575             cpuflags="-march=$cpu"
3576             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3577         ;;
3578         *)
3579             cpuflags="-mcpu=$cpu"
3580             case $cpu in
3581                 cortex-a*)                               subarch=armv7a  ;;
3582                 cortex-r*)                               subarch=armv7r  ;;
3583                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3584                 arm11*)                                  subarch=armv6   ;;
3585                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3586                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3587                 *)                             subarch=$(probe_arm_arch) ;;
3588             esac
3589         ;;
3590     esac
3591
3592     case "$subarch" in
3593         armv5t*)    enable fast_clz                ;;
3594         armv[6-8]*) enable fast_clz fast_unaligned ;;
3595     esac
3596
3597 elif enabled avr32; then
3598
3599     case $cpu in
3600         ap7[02]0[0-2])
3601             subarch="avr32_ap"
3602             cpuflags="-mpart=$cpu"
3603         ;;
3604         ap)
3605             subarch="avr32_ap"
3606             cpuflags="-march=$cpu"
3607         ;;
3608         uc3[ab]*)
3609             subarch="avr32_uc"
3610             cpuflags="-mcpu=$cpu"
3611         ;;
3612         uc)
3613             subarch="avr32_uc"
3614             cpuflags="-march=$cpu"
3615         ;;
3616     esac
3617
3618 elif enabled bfin; then
3619
3620     cpuflags="-mcpu=$cpu"
3621
3622 elif enabled mips; then
3623
3624     cpuflags="-march=$cpu"
3625
3626 elif enabled ppc; then
3627
3628     disable ldbrx
3629
3630     case $(tolower $cpu) in
3631         601|ppc601|powerpc601)
3632             cpuflags="-mcpu=601"
3633             disable altivec
3634         ;;
3635         603*|ppc603*|powerpc603*)
3636             cpuflags="-mcpu=603"
3637             disable altivec
3638         ;;
3639         604*|ppc604*|powerpc604*)
3640             cpuflags="-mcpu=604"
3641             disable altivec
3642         ;;
3643         g3|75*|ppc75*|powerpc75*)
3644             cpuflags="-mcpu=750"
3645             disable altivec
3646         ;;
3647         g4|745*|ppc745*|powerpc745*)
3648             cpuflags="-mcpu=7450"
3649             disable vsx
3650         ;;
3651         74*|ppc74*|powerpc74*)
3652             cpuflags="-mcpu=7400"
3653             disable vsx
3654         ;;
3655         g5|970|ppc970|powerpc970)
3656             cpuflags="-mcpu=970"
3657             disable vsx
3658         ;;
3659         power[3-6]*)
3660             cpuflags="-mcpu=$cpu"
3661             disable vsx
3662         ;;
3663         power[7-8]*)
3664             cpuflags="-mcpu=$cpu"
3665             enable ldbrx
3666         ;;
3667         cell)
3668             cpuflags="-mcpu=cell"
3669             enable ldbrx
3670             disable vsx
3671         ;;
3672         e500mc)
3673             cpuflags="-mcpu=e500mc"
3674             disable altivec
3675         ;;
3676         e500v2)
3677             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3678             disable altivec
3679             disable dcbzl
3680         ;;
3681         e500)
3682             cpuflags="-mcpu=8540 -mhard-float"
3683             disable altivec
3684             disable dcbzl
3685         ;;
3686     esac
3687
3688 elif enabled sparc; then
3689
3690     case $cpu in
3691         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3692             cpuflags="-mcpu=$cpu"
3693         ;;
3694         ultrasparc*|niagara[234])
3695             cpuflags="-mcpu=$cpu"
3696         ;;
3697     esac
3698
3699 elif enabled x86; then
3700
3701     case $cpu in
3702         i[345]86|pentium)
3703             cpuflags="-march=$cpu"
3704             disable i686
3705             disable mmx
3706         ;;
3707         # targets that do NOT support nopl and conditional mov (cmov)
3708         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3709             cpuflags="-march=$cpu"
3710             disable i686
3711         ;;
3712         # targets that do support nopl and conditional mov (cmov)
3713         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3714             cpuflags="-march=$cpu"
3715             enable i686
3716             enable fast_cmov
3717         ;;
3718         # targets that do support conditional mov but on which it's slow
3719         pentium4|pentium4m|prescott|nocona)
3720             cpuflags="-march=$cpu"
3721             enable i686
3722             disable fast_cmov
3723         ;;
3724     esac
3725
3726 fi
3727
3728 if [ "$cpu" != generic ]; then
3729     add_cflags  $cpuflags
3730     add_asflags $cpuflags
3731     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3732 fi
3733
3734 # compiler sanity check
3735 check_exec <<EOF
3736 int main(void){ return 0; }
3737 EOF
3738 if test "$?" != 0; then
3739     echo "$cc is unable to create an executable file."
3740     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3741         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3742         echo "Only do this if you know what cross compiling means."
3743     fi
3744     die "C compiler test failed."
3745 fi
3746
3747 add_cppflags -D_ISOC99_SOURCE
3748
3749 # some compilers silently accept -std=c11, so we also need to check that the
3750 # version macro is defined properly
3751 check_cpp_condition stdlib.h  "__STDC_VERSION__ >= 201112L" -std=c11 &&
3752     add_cflags -std=c11 ||
3753     check_cflags -std=c99
3754
3755 check_cppflags -D_FILE_OFFSET_BITS=64
3756 check_cppflags -D_LARGEFILE_SOURCE
3757
3758 add_host_cppflags -D_ISOC99_SOURCE
3759 check_host_cflags -std=c99
3760 check_host_cflags -Wall
3761 check_host_cflags $host_cflags_speed
3762
3763 check_64bit(){
3764     arch32=$1
3765     arch64=$2
3766     expr=$3
3767     check_code cc "" "int test[2*($expr) - 1]" &&
3768         subarch=$arch64 || subarch=$arch32
3769 }
3770
3771 case "$arch" in
3772     aarch64|alpha|ia64)
3773         spic=$shared
3774     ;;
3775     mips)
3776         check_64bit mips mips64 '_MIPS_SIM > 1'
3777         spic=$shared
3778     ;;
3779     parisc)
3780         check_64bit parisc parisc64 'sizeof(void *) > 4'
3781         spic=$shared
3782     ;;
3783     ppc)
3784         check_64bit ppc ppc64 'sizeof(void *) > 4'
3785         spic=$shared
3786     ;;
3787     s390)
3788         check_64bit s390 s390x 'sizeof(void *) > 4'
3789         spic=$shared
3790     ;;
3791     sparc)
3792         check_64bit sparc sparc64 'sizeof(void *) > 4'
3793         spic=$shared
3794     ;;
3795     x86)
3796         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3797         if test "$subarch" = "x86_64"; then
3798             spic=$shared
3799         fi
3800     ;;
3801 esac
3802
3803 enable $subarch
3804 enabled spic && enable_weak pic
3805
3806 enabled x86_64 && objformat=elf64 || objformat="elf32"
3807
3808 # OS specific
3809 case $target_os in
3810     aix)
3811         SHFLAGS=-shared
3812         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3813         enabled shared && add_ldflags -Wl,-brtl
3814         arflags='-Xany -r -c'
3815         ;;
3816     android)
3817         disable symver
3818         enable section_data_rel_ro
3819         SLIB_INSTALL_NAME='$(SLIBNAME)'
3820         SLIB_INSTALL_LINKS=
3821         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3822         ;;
3823     haiku)
3824         prefix_default="/boot/common"
3825         network_extralibs="-lnetwork"
3826         host_extralibs=
3827         ;;
3828     sunos)
3829         SHFLAGS='-shared -Wl,-h,$$(@F)'
3830         enabled x86 && append SHFLAGS -mimpure-text
3831         network_extralibs="-lsocket -lnsl"
3832         # When using suncc to build, the Solaris linker will mark
3833         # an executable with each instruction set encountered by
3834         # the Solaris assembler.  As our libraries contain their own
3835         # guards for processor-specific code, instead suppress
3836         # generation of the HWCAPS ELF section on Solaris x86 only.
3837         enabled_all suncc x86 &&
3838             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3839             add_ldflags -Wl,-M,mapfile
3840         nm_default='nm -P -g'
3841         version_script='-M'
3842         VERSION_SCRIPT_POSTPROCESS_CMD='perl $(SRC_PATH)/compat/solaris/make_sunver.pl - $(OBJS)'
3843         ;;
3844     netbsd)
3845         disable symver
3846         oss_indev_extralibs="-lossaudio"
3847         ;;
3848     openbsd|bitrig)
3849         disable symver
3850         SHFLAGS='-shared'
3851         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3852         SLIB_INSTALL_LINKS=
3853         oss_indev_extralibs="-lossaudio"
3854         ;;
3855     dragonfly)
3856         disable symver
3857         ;;
3858     freebsd)
3859         ;;
3860     bsd/os)
3861         add_extralibs -lpoll -lgnugetopt
3862         ;;
3863     darwin)
3864         enabled ppc && add_asflags -force_cpusubtype_ALL
3865         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3866         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3867         add_ldflags -Wl,-dynamic,-search_paths_first
3868         check_cflags -Werror=partial-availability
3869         SLIBSUF=".dylib"
3870         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME).$(LIBVERSION)$(SLIBSUF)'
3871         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME).$(LIBMAJOR)$(SLIBSUF)'
3872         enabled x86_64 && objformat="macho64" || objformat="macho32"
3873         enabled_any pic shared ||
3874             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3875         check_header dispatch/dispatch.h &&
3876             add_cppflags '-I\$(SRC_PATH)/compat/dispatch_semaphore'
3877         if test -n "$sysroot"; then
3878             is_in -isysroot $cc $CPPFLAGS $CFLAGS || check_cppflags -isysroot $sysroot
3879             is_in -isysroot $ld $LDFLAGS          || check_ldflags  -isysroot $sysroot
3880         fi
3881         ;;
3882     msys*)
3883         die "Native MSYS builds are discouraged, please use the MINGW environment."
3884         ;;
3885     mingw32*|mingw64*)
3886         target_os=mingw32
3887         if enabled shared; then
3888             # Cannot build both shared and static libs when using dllexport.
3889             disable static
3890         fi
3891         check_ldflags -Wl,--nxcompat
3892         check_ldflags -Wl,--dynamicbase
3893         shlibdir_default="$bindir_default"
3894         SLIBPREF=""
3895         SLIBSUF=".dll"
3896         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3897         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3898         SLIB_EXTRA_CMD='cp $(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3899         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3900         SLIB_INSTALL_LINKS=
3901         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3902         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3903         SLIB_CREATE_DEF_CMD='ARCH="$(ARCH)" AR="$(AR_CMD)" NM="$(NM_CMD)" $(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3904         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-auto-image-base $$(@:$(SLIBSUF)=.def)'
3905         enabled x86_64 && objformat="win64" || objformat="win32"
3906         ranlib=:
3907         enable dos_paths
3908         ;;
3909     win32|win64)
3910         disable symver
3911         if enabled shared; then
3912             # Link to the import library instead of the normal static library
3913             # for shared libs.
3914             LD_LIB='%.lib'
3915             # Cannot build both shared and static libs with MSVC or icl.
3916             disable static
3917         fi
3918         shlibdir_default="$bindir_default"
3919         SLIBPREF=""
3920         SLIBSUF=".dll"
3921         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3922         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3923         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3924         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3925         SLIB_INSTALL_LINKS=
3926         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3927         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3928         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3929         enabled x86_64 && objformat="win64" || objformat="win32"
3930         ranlib=:
3931         enable dos_paths
3932         ;;
3933     cygwin*)
3934         target_os=cygwin
3935         shlibdir_default="$bindir_default"
3936         SLIBPREF="cyg"
3937         SLIBSUF=".dll"
3938         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3939         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3940         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3941         SLIB_INSTALL_LINKS=
3942         SLIB_INSTALL_EXTRA_LIB='lib$(NAME).dll.a'
3943         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(NAME).dll.a'
3944         enabled x86_64 && objformat="win64" || objformat="win32"
3945         enable dos_paths
3946         ;;
3947     *-dos|freedos|opendos)
3948         network_extralibs="-lsocket"
3949         objformat="coff"
3950         enable dos_paths
3951         add_cppflags -U__STRICT_ANSI__
3952         ;;
3953     linux)
3954         enable section_data_rel_ro
3955         ;;
3956     irix*)
3957         target_os=irix
3958         ranlib="echo ignoring ranlib"
3959         ;;
3960     os/2*)
3961         ln_s="cp -f"
3962         objformat="aout"
3963         add_cppflags -D_GNU_SOURCE
3964         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zhigh-mem -Zmap
3965         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3966         LIBSUF="_s.a"
3967         SLIBPREF=""
3968         SLIBSUF=".dll"
3969         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3970         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3971         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3972             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3973             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3974             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3975             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3976         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3977             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3978         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3979         enable dos_paths
3980         ;;
3981     gnu/kfreebsd)
3982         add_cppflags -D_BSD_SOURCE
3983         ;;
3984     gnu)
3985         ;;
3986     qnx)
3987         add_cppflags -D_QNX_SOURCE
3988         network_extralibs="-lsocket"
3989         ;;
3990     symbian)
3991         SLIBSUF=".dll"
3992         enable dos_paths
3993         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3994         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3995         add_ldflags -Wl,--target1-abs,--no-undefined \
3996                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3997                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3998         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3999                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
4000                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
4001         ;;
4002     minix)
4003         ;;
4004     none)
4005         ;;
4006     *)
4007         die "Unknown OS '$target_os'."
4008         ;;
4009 esac
4010
4011 # determine libc flavour
4012
4013 probe_libc(){
4014     pfx=$1
4015     pfx_no_=${pfx%_}
4016     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
4017     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
4018         eval ${pfx}libc_type=uclibc
4019         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4020     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
4021         eval ${pfx}libc_type=glibc
4022         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4023     # MinGW headers can be installed on Cygwin, so check for newlib first.
4024     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
4025         eval ${pfx}libc_type=newlib
4026         add_${pfx}cppflags -U__STRICT_ANSI__ -D_XOPEN_SOURCE=600
4027     # MinGW64 is backwards compatible with MinGW32, so check for it first.
4028     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
4029         eval ${pfx}libc_type=mingw64
4030         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4031         eval test \$${pfx_no_}cc_type = "gcc" &&
4032             add_${pfx}cppflags -D__printf__=__gnu_printf__
4033     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
4034          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
4035         eval ${pfx}libc_type=mingw32
4036         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
4037             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
4038             die "ERROR: MinGW32 runtime version must be >= 3.15."
4039         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4040         check_${pfx}cpp_condition _mingw.h "__MSVCRT_VERSION__ < 0x0700" &&
4041             add_${pfx}cppflags -D__MSVCRT_VERSION__=0x0700
4042         check_${pfx}cpp_condition windows.h "defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0502" &&
4043             add_${pfx}cppflags -D_WIN32_WINNT=0x0502
4044         eval test \$${pfx_no_}cc_type = "gcc" &&
4045             add_${pfx}cppflags -D__printf__=__gnu_printf__
4046     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
4047         eval ${pfx}libc_type=msvcrt
4048         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
4049             if [ "$pfx" = host_ ]; then
4050                 add_host_cppflags -Dsnprintf=_snprintf
4051             else
4052                 add_compat strtod.o strtod=avpriv_strtod
4053                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
4054                                              _snprintf=avpriv_snprintf  \
4055                                              vsnprintf=avpriv_vsnprintf
4056             fi
4057         fi
4058         add_${pfx}cppflags -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS
4059         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
4060         # 0x601 by default unless something else is set by the user.
4061         # This can easily lead to us detecting functions only present
4062         # in such new versions and producing binaries requiring windows 7.0.
4063         # Therefore explicitly set the default to XP unless the user has
4064         # set something else on the command line.
4065         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
4066         # family. For these cases, configure is free to use any functions
4067         # found in the SDK headers by default. (Alternatively, we could force
4068         # _WIN32_WINNT to 0x0602 in that case.)
4069         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
4070             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
4071 #ifdef WINAPI_FAMILY
4072 #include <winapifamily.h>
4073 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4074 #error not desktop
4075 #endif
4076 #endif
4077 EOF
4078         if [ "$pfx" = "" ]; then
4079             check_func strtoll || add_cflags -Dstrtoll=_strtoi64
4080         fi
4081     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4082         eval ${pfx}libc_type=klibc
4083     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4084         eval ${pfx}libc_type=bionic
4085     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4086         eval ${pfx}libc_type=solaris
4087         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4088     else
4089         eval ${pfx}libc_type=default
4090         add_${pfx}cppflags -D_DEFAULT_SOURCE
4091     fi
4092     eval test -n "\${${pfx}libc_type}" && enable ${pfx}libc_${libc_type}
4093 }
4094
4095 probe_libc
4096 probe_libc host_
4097
4098 # hacks for compiler/libc/os combinations
4099
4100 case $libc_type in
4101     bionic)
4102         add_compat strtod.o strtod=avpriv_strtod
4103         ;;
4104 esac
4105
4106 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4107     add_cppflags '-I\$(SRC_PATH)/compat/float'
4108
4109 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4110
4111 set_default $PATHS_LIST
4112 set_default nm
4113
4114 disabled optimizations || check_cflags -fomit-frame-pointer
4115
4116 enable_weak_pic() {
4117     disabled pic && return
4118     enable pic
4119     add_cppflags -DPIC
4120     case "$target_os" in
4121     mingw*|cygwin*|win*)
4122         ;;
4123     *)
4124         add_cflags -fPIC
4125         add_asflags -fPIC
4126         ;;
4127     esac
4128 }
4129
4130 enabled pic && enable_weak_pic
4131
4132 check_cc <<EOF || die "Symbol mangling check failed."
4133 int ff_extern;
4134 EOF
4135 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4136 extern_prefix=${sym%%ff_extern*}
4137
4138 ! disabled inline_asm && check_inline_asm inline_asm '"" ::'
4139
4140 _restrict=
4141 for restrict_keyword in restrict __restrict__ __restrict; do
4142     check_cc <<EOF && _restrict=$restrict_keyword && break
4143 void foo(char * $restrict_keyword p);
4144 EOF
4145 done
4146
4147 check_cc <<EOF && enable pragma_deprecated
4148 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4149 EOF
4150
4151 check_cc <<EOF || die "endian test failed"
4152 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4153 EOF
4154 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4155
4156 check_gas() {
4157     log "check_gas using '$as' as AS"
4158     # :vararg is used on aarch64, arm and ppc altivec
4159     check_as <<EOF || return 1
4160 .macro m n, y:vararg=0
4161 \n: .int \y
4162 .endm
4163 m x
4164 EOF
4165     # .altmacro is only used in arm asm
4166     ! enabled arm || check_as <<EOF || return 1
4167 .altmacro
4168 EOF
4169     enable gnu_as
4170     return 0
4171 }
4172
4173 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4174     nogas=:
4175     enabled_any arm aarch64 && nogas=die
4176     enabled_all ppc altivec && nogas=warn
4177     as_noop=-v
4178
4179     case $as_type in
4180         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4181         gcc)  gaspp_as_type=gas ;;
4182         *)    gaspp_as_type=$as_type ;;
4183     esac
4184
4185     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4186
4187     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4188         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4189
4190     if ! check_gas ; then
4191         as=${gas:=$as}
4192         check_gas || \
4193             $nogas "GNU assembler not found, install/update gas-preprocessor"
4194     fi
4195
4196     check_as <<EOF && enable as_func
4197 .func test
4198 .endfunc
4199 EOF
4200 fi
4201
4202 check_inline_asm inline_asm_labels '"1:\n"'
4203
4204 if enabled aarch64; then
4205     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4206     # internal assembler in clang 3.3 does not support this instruction
4207     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4208     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4209
4210     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4211
4212 elif enabled alpha; then
4213
4214     check_cflags -mieee
4215
4216 elif enabled arm; then
4217
4218     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4219     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4220     enabled thumb && check_cflags -mthumb || check_cflags -marm
4221
4222     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4223         enable vfp_args
4224     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4225         enable vfp_args
4226     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4227         case "${cross_prefix:-$cc}" in
4228             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4229             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4230 __asm__ (".eabi_attribute 28, 1");
4231 int main(void) { return 0; }
4232 EOF
4233         esac
4234         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4235     fi
4236
4237     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4238     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4239     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4240     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4241     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4242     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4243
4244     [ $target_os = linux ] || [ $target_os = android ] ||
4245         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4246             $ARCH_EXT_LIST_ARM
4247
4248     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4249
4250     check_as <<EOF && enable as_arch_directive
4251 .arch armv7-a
4252 EOF
4253     check_as <<EOF && enable as_fpu_directive
4254 .fpu neon
4255 EOF
4256
4257     # llvm's integrated assembler supports .object_arch from llvm 3.5
4258     [ "$objformat" = elf32 ] || [ "$objformat" = elf64 ] &&
4259         check_as <<EOF && enable as_object_arch
4260 .object_arch armv4
4261 EOF
4262
4263     # MS armasm fails to assemble our PIC constructs
4264     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4265
4266 elif enabled mips; then
4267
4268     # make sure that only one instruction set is enabled
4269     disable $ARCH_EXT_LIST_MIPS
4270
4271     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4272
4273     if enabled mips64; then
4274         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4275             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4276                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4277     else
4278         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4279             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4280                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4281     fi
4282
4283 elif enabled parisc; then
4284
4285     if enabled gcc; then
4286         case $($cc -dumpversion) in
4287             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4288         esac
4289     fi
4290
4291 elif enabled ppc; then
4292
4293     enable local_aligned_8 local_aligned_16 local_aligned_32
4294
4295     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4296     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4297     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4298     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4299
4300     if enabled altivec; then
4301         check_cflags -maltivec -mabi=altivec
4302
4303         # check if our compiler supports Motorola AltiVec C API
4304         check_code cc altivec.h "vector signed int v1 = (vector signed int) { 0 };
4305                                  vector signed int v2 = (vector signed int) { 1 };
4306                                  v1 = vec_add(v1, v2);" ||
4307             disable altivec
4308
4309         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4310     fi
4311
4312     if enabled vsx; then
4313         check_cflags -mvsx &&
4314         check_code cc altivec.h "int v[4] = { 0 };
4315                                  vector signed int v1 = vec_vsx_ld(0, v);" ||
4316             disable vsx
4317     fi
4318
4319     if enabled power8; then
4320         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4321     fi
4322
4323 elif enabled x86; then
4324
4325     check_builtin rdtsc    intrin.h   "__rdtsc()"
4326     check_builtin mm_empty mmintrin.h "_mm_empty()"
4327
4328     enable local_aligned_8 local_aligned_16 local_aligned_32
4329
4330     # check whether EBP is available on x86
4331     # As 'i' is stored on the stack, this program will crash
4332     # if the base pointer is used to access it because the
4333     # base pointer is cleared in the inline assembly code.
4334     check_exec_crash <<EOF && enable ebp_available
4335 volatile int i=0;
4336 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4337 return i;
4338 EOF
4339
4340     # check whether EBX is available on x86
4341     check_inline_asm ebx_available '""::"b"(0)' &&
4342         check_inline_asm ebx_available '"":::"%ebx"'
4343
4344     # check whether xmm clobbers are supported
4345     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4346
4347     # check whether binutils is new enough to compile SSSE3/MMXEXT
4348     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4349     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4350
4351     probe_x86asm(){
4352         x86asmexe_probe=$1
4353         if check_cmd $x86asmexe_probe -v; then
4354             x86asmexe=$x86asmexe_probe
4355             x86asm_type=nasm
4356             x86asm_debug="-g -F dwarf"
4357             X86ASMDEP=
4358             X86ASM_DEPFLAGS='-MD $(@:.o=.d)'
4359         elif check_cmd $x86asmexe_probe --version; then
4360             x86asmexe=$x86asmexe_probe
4361             x86asm_type=yasm
4362             x86asm_debug="-g dwarf2"
4363             X86ASMDEP='$(DEPX86ASM) $(X86ASMFLAGS) -M $(X86ASM_O) $< > $(@:.o=.d)'
4364             X86ASM_DEPFLAGS=
4365         fi
4366         check_x86asm "movbe ecx, [5]" && enable x86asm
4367     }
4368
4369     if ! disabled_any asm mmx x86asm; then
4370         disable x86asm
4371         for program in $x86asmexe nasm yasm; do
4372             probe_x86asm $program && break
4373         done
4374         disabled x86asm && die "nasm/yasm not found or too old. Use --disable-x86asm for a crippled build."
4375         X86ASMFLAGS="-f $objformat"
4376         enabled pic               && append X86ASMFLAGS "-DPIC"
4377         test -n "$extern_prefix"  && append X86ASMFLAGS "-DPREFIX"
4378         case "$objformat" in
4379             elf*) enabled debug && append X86ASMFLAGS $x86asm_debug ;;
4380         esac
4381
4382         check_x86asm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4383         check_x86asm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4384         check_x86asm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4385         check_x86asm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4386         check_x86asm "CPU amdnop"                      || disable cpunop
4387     fi
4388
4389     case "$cpu" in
4390         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4391             disable fast_clz
4392         ;;
4393     esac
4394
4395 fi
4396
4397 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4398
4399 check_ldflags -Wl,--as-needed
4400
4401 if ! disabled network; then
4402     check_func getaddrinfo $network_extralibs
4403     check_func inet_aton $network_extralibs
4404
4405     check_type netdb.h "struct addrinfo"
4406     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4407     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4408     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4409     check_type poll.h "struct pollfd"
4410     check_type netinet/sctp.h "struct sctp_event_subscribe"
4411     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4412     check_type netinet/in.h "struct sockaddr_in6"
4413     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4414     check_type "sys/types.h sys/socket.h" socklen_t
4415
4416     # Prefer arpa/inet.h over winsock2
4417     if check_header arpa/inet.h ; then
4418         check_func closesocket
4419     elif check_header winsock2.h ; then
4420         check_func_headers winsock2.h closesocket -lws2 &&
4421             network_extralibs="-lws2" ||
4422         { check_func_headers winsock2.h closesocket -lws2_32 &&
4423             network_extralibs="-lws2_32"; } || disable winsock2_h network
4424         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4425
4426         check_type ws2tcpip.h socklen_t
4427         check_type ws2tcpip.h "struct addrinfo"
4428         check_type ws2tcpip.h "struct group_source_req"
4429         check_type ws2tcpip.h "struct ip_mreq_source"
4430         check_type ws2tcpip.h "struct ipv6_mreq"
4431         check_type winsock2.h "struct pollfd"
4432         check_struct winsock2.h "struct sockaddr" sa_len
4433         check_type ws2tcpip.h "struct sockaddr_in6"
4434         check_type ws2tcpip.h "struct sockaddr_storage"
4435     else
4436         disable network
4437     fi
4438 fi
4439
4440 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4441 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4442 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4443 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4444
4445 case "$custom_allocator" in
4446     jemalloc)
4447         # jemalloc by default does not use a prefix
4448         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4449     ;;
4450     tcmalloc)
4451         require_pkg_config libtcmalloc libtcmalloc gperftools/tcmalloc.h tc_malloc
4452         malloc_prefix=tc_
4453     ;;
4454 esac
4455
4456 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4457 check_func  ${malloc_prefix}memalign            && enable memalign
4458 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4459
4460 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4461     { check_lib clock_gettime time.h clock_gettime ||
4462       check_lib clock_gettime time.h clock_gettime -lrt; }
4463
4464 check_func  fcntl
4465 check_func  gethrtime
4466 check_func  getopt
4467 check_func  getrusage
4468 check_func  gettimeofday
4469 check_func  gmtime_r
4470 check_func  isatty
4471 check_func  localtime_r
4472 check_func  mkstemp
4473 check_func  mmap
4474 check_func  mprotect
4475 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4476 check_func_headers time.h nanosleep || check_lib nanosleep time.h nanosleep -lrt
4477 check_func  sched_getaffinity
4478 check_func  setrlimit
4479 check_func  strerror_r
4480 check_func  sysconf
4481 check_func  sysctl
4482 check_func  usleep
4483
4484 check_func_headers io.h setmode
4485 check_func_headers mach/mach_time.h mach_absolute_time
4486 check_func_headers stdlib.h getenv
4487
4488 check_func_headers windows.h GetProcessAffinityMask
4489 check_func_headers windows.h GetProcessTimes
4490 check_func_headers windows.h GetSystemTimeAsFileTime
4491 check_func_headers windows.h LoadLibrary
4492 check_func_headers windows.h MapViewOfFile
4493 check_func_headers windows.h SetConsoleTextAttribute
4494 check_func_headers windows.h Sleep
4495 check_func_headers windows.h VirtualAlloc
4496 check_struct windows.h "CONDITION_VARIABLE" Ptr
4497
4498 check_header direct.h
4499 check_header dxgidebug.h
4500 check_header dxva.h
4501 check_header dxva2api.h
4502 check_header io.h
4503 check_header malloc.h
4504 check_header poll.h
4505 check_header sys/param.h
4506 check_header sys/resource.h
4507 check_header sys/select.h
4508 check_header sys/time.h
4509 check_header sys/un.h
4510 check_header unistd.h
4511 check_header valgrind/valgrind.h
4512 check_header VideoDecodeAcceleration/VDADecoder.h
4513 check_header windows.h
4514
4515 # it seems there are versions of clang in some distros that try to use the
4516 # gcc headers, which explodes for stdatomic
4517 # so we also check that atomics actually work here
4518 check_builtin stdatomic stdatomic.h "atomic_int foo; atomic_store(&foo, 0)"
4519
4520 check_lib ole32    "windows.h"            CoTaskMemFree        -lole32
4521 check_lib shell32  "windows.h shellapi.h" CommandLineToArgvW   -lshell32
4522 check_lib wincrypt "windows.h wincrypt.h" CryptGenRandom       -ladvapi32
4523 check_lib psapi    "windows.h psapi.h"    GetProcessMemoryInfo -lpsapi
4524
4525 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4526
4527 check_type "cuviddec.h" "CUVIDH264PICPARAMS"
4528 check_type "cuviddec.h" "CUVIDHEVCPICPARAMS"
4529 check_struct "cuviddec.h" "CUVIDDECODECREATEINFO" bitDepthMinus8
4530
4531 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4532 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4533 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4534
4535 check_type "va/va.h va/va_dec_hevc.h" "VAPictureParameterBufferHEVC"
4536 check_type "va/va.h va/va_dec_vp8.h" "VAPictureParameterBufferVP8"
4537 check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
4538 check_type "va/va.h va/va_enc_h264.h" "VAEncPictureParameterBufferH264"
4539 check_type "va/va.h va/va_enc_hevc.h" "VAEncPictureParameterBufferHEVC"
4540 check_type "va/va.h va/va_enc_jpeg.h" "VAEncPictureParameterBufferJPEG"
4541 check_type "va/va.h va/va_enc_mpeg2.h" "VAEncPictureParameterBufferMPEG2"
4542 check_type "va/va.h va/va_enc_vp8.h"  "VAEncPictureParameterBufferVP8"
4543 check_type "va/va.h va/va_enc_vp9.h"  "VAEncPictureParameterBufferVP9"
4544
4545 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4546
4547 if ! disabled w32threads && ! enabled pthreads; then
4548     check_lib w32threads "windows.h process.h" _beginthreadex
4549 fi
4550
4551 # check for some common methods of building with pthread support
4552 # do this before the optional library checks as some of them require pthreads
4553 if ! disabled pthreads && ! enabled w32threads; then
4554     if check_lib pthreads pthread.h pthread_join -pthread; then
4555         add_cflags -pthread
4556     elif check_lib pthreads pthread.h pthread_join -pthreads; then
4557         add_cflags -pthreads
4558     elif check_lib pthreads pthread.h pthread_join -lpthreadGC2; then
4559         :
4560     elif check_lib pthreads pthread.h pthread_join -lpthread; then
4561         :
4562     elif check_func pthread_join; then
4563         enable pthreads
4564     fi
4565     enabled pthreads &&
4566         check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwait(s,0); sem_destroy(s)" $pthreads_extralibs
4567 fi
4568
4569 disabled  zlib || check_lib  zlib  zlib.h      zlibVersion -lz
4570 disabled bzlib || check_lib bzlib bzlib.h BZ2_bzlibVersion -lbz2
4571
4572 # On some systems dynamic loading requires no extra linker flags
4573 check_lib libdl dlfcn.h dlopen || check_lib libdl dlfcn.h dlopen -ldl
4574
4575 check_lib libm math.h sin -lm
4576
4577 atan2f_args=2
4578 ldexpf_args=2
4579 powf_args=2
4580
4581 for func in $MATH_FUNCS; do
4582     eval check_mathfunc $func \${${func}_args:-1} $libm_extralibs
4583 done
4584
4585 # these are off by default, so fail if requested and not available
4586 enabled avisynth          && require_header avisynth/avisynth_c.h
4587 enabled avxsynth          && require_header avxsynth/avxsynth_c.h
4588 enabled cuda              && require cuda cuda.h cuInit -lcuda
4589 enabled cuvid             && require cuvid cuviddec.h cuvidCreateDecoder -lnvcuvid
4590 enabled frei0r            && require_header frei0r.h
4591 enabled gnutls            && require_pkg_config gnutls gnutls gnutls/gnutls.h gnutls_global_init &&
4592                              check_lib gmp gmp.h mpz_export -lgmp
4593 enabled libbs2b           && require_pkg_config libbs2b libbs2b bs2b.h bs2b_open
4594 enabled libdc1394         && require_pkg_config libdc1394 libdc1394-2 dc1394/dc1394.h dc1394_new
4595 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4596 enabled libfaac           && require libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4597 enabled libfdk_aac        && require_pkg_config libfdk_aac fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4598 enabled libfontconfig     && require_pkg_config libfontconfig fontconfig "fontconfig/fontconfig.h" FcInit
4599 enabled libfreetype       && require_pkg_config libfreetype freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4600 enabled libgsm            && require libgsm gsm.h gsm_create -lgsm
4601 enabled libhdcd           && require_pkg_config libhdcd libhdcd "hdcd/hdcd_simple.h" hdcd_new
4602 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4603 enabled libkvazaar        && require_pkg_config libkvazaar "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4604 enabled libmfx            && require_pkg_config libmfx libmfx "mfx/mfxvideo.h" MFXInit
4605 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4606 enabled libnpp            && require libnpp npp.h nppGetLibVersion -lnppi -lnppc
4607 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4608 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4609 enabled libopencv         && require_pkg_config libopencv opencv opencv/cv.h cvCreateImageHeader
4610 enabled libopenh264       && require_pkg_config libopenh264 openh264 wels/codec_api.h WelsGetCodecVersion
4611 enabled libopenjpeg       && { check_lib libopenjpeg openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC ||
4612                                require_pkg_config libopenjpeg libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; }
4613 enabled libopus           && require_pkg_config libopus opus opus_multistream.h opus_multistream_decoder_create
4614 enabled libpulse          && require_pkg_config libpulse libpulse-simple pulse/simple.h pa_simple_new
4615 enabled librtmp           && require_pkg_config librtmp librtmp librtmp/rtmp.h RTMP_Socket
4616 enabled libschroedinger   && require_pkg_config libschroedinger schroedinger-1.0 schroedinger/schro.h schro_init
4617 enabled libsnappy         && require libsnappy snappy-c.h snappy_compress -lsnappy
4618 enabled libspeex          && require_pkg_config libspeex speex speex/speex.h speex_decoder_init
4619 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4620 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4621 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4622 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4623 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4624 enabled libvpx            && require_pkg_config libvpx "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version &&
4625                              { enabled libvpx_vp8_decoder &&
4626                                    check_pkg_config libvpx_vp8_decoder vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx
4627                                enabled libvpx_vp8_encoder &&
4628                                    check_pkg_config libvpx_vp8_encoder vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx
4629                                enabled libvpx_vp9_decoder &&
4630                                    check_pkg_config libvpx_vp9_decoder vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx
4631                                enabled libvpx_vp9_encoder &&
4632                                    check_pkg_config libvpx_vp9_encoder vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx
4633                                disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder &&
4634                                    die "libvpx enabled but no supported decoders/encoders found"
4635                              }
4636 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4637 enabled libwebp           && require_pkg_config libwebp libwebp webp/encode.h WebPGetEncoderVersion
4638 enabled libx264           && require_pkg_config libx264 x264 "stdint.h x264.h" x264_encoder_encode &&
4639                              require_cpp_condition x264.h "X264_BUILD >= 118" &&
4640                              { check_cpp_condition x264.h "X264_MPEG2" &&
4641                                enable libx262; }
4642 enabled libx265           && require_pkg_config libx265 x265 x265.h x265_api_get &&
4643                              require_cpp_condition x265.h "X265_BUILD >= 57"
4644 enabled libxavs           && require libxavs "stdint.h xavs.h" xavs_encoder_encode -lxavs
4645 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4646 enabled mmal              && { check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4647                                { ! enabled cross_compile &&
4648                                  add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline &&
4649                                  add_ldflags -L/opt/vc/lib/ &&
4650                                  check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host; } ||
4651                                die "ERROR: mmal not found" &&
4652                                check_func_headers interface/mmal/mmal.h "MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS"; }
4653 enabled nvenc             && require_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 6"
4654 enabled omx               && require_header OMX_Core.h
4655 enabled omx_rpi           && { check_header OMX_Core.h ||
4656                                { ! enabled cross_compile && add_cflags -isystem/opt/vc/include/IL && check_header OMX_Core.h ; } ||
4657                                die "ERROR: OpenMAX IL headers not found"; } && enable omx
4658 enabled openssl           && { { check_pkg_config openssl openssl openssl/ssl.h OPENSSL_init_ssl ||
4659                                  check_pkg_config openssl openssl openssl/ssl.h SSL_library_init; } ||
4660                                check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4661                                check_lib openssl openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4662                                check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4663                                die "ERROR: openssl not found"; }
4664
4665 # SDL adds some CFLAGS that should not be part of the general CFLAGS.
4666 enabled avplay &&
4667     test_pkg_config sdl "sdl >= 1.2.1 sdl < 1.3.0" SDL_events.h SDL_PollEvent
4668
4669 ! disabled pod2man   && check_cmd pod2man --help     && enable pod2man   || disable pod2man
4670 ! disabled texi2html && check_cmd texi2html -version && enable texi2html || disable texi2html
4671
4672 check_header linux/fb.h
4673 check_header linux/videodev2.h
4674 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4675
4676 check_header AVFoundation/AVFoundation.h
4677
4678 check_header sys/videoio.h
4679
4680 check_lib user32 "windows.h winuser.h" GetShellWindow -luser32
4681 check_lib vfw32 "windows.h vfw.h" capCreateCaptureWindow -lvfw32
4682 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4683 # w32api 3.12 had it defined wrong
4684 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4685
4686 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4687 check_header "dev/bktr/ioctl_meteor.h dev/bktr/ioctl_bt848.h"                   ||
4688     check_header "machine/ioctl_meteor.h machine/ioctl_bt848.h"                 ||
4689     check_header "dev/video/meteor/ioctl_meteor.h dev/video/bktr/ioctl_bt848.h" ||
4690     check_header "dev/ic/bt8xx.h"
4691
4692 check_header sys/soundcard.h
4693
4694 enabled alsa_indev &&
4695     check_lib alsa alsa/asoundlib.h snd_pcm_htimestamp -lasound
4696
4697 enabled libjack &&
4698     require_pkg_config libjack jack jack/jack.h jack_port_get_latency_range
4699
4700 enabled sndio_indev && check_lib sndio sndio.h sio_open -lsndio
4701
4702 if enabled libcdio; then
4703     check_lib libcdio "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4704     check_lib libcdio "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4705     die "ERROR: No usable libcdio/cdparanoia found"
4706 fi
4707
4708 if enabled libxcb; then
4709     require_pkg_config libxcb xcb xcb/xcb.h xcb_connect
4710     require_pkg_config libxcb_shape xcb-shape xcb/shape.h xcb_shape_rectangles
4711     disabled libxcb_shm ||
4712         check_pkg_config libxcb_shm xcb-shm xcb/shm.h xcb_shm_attach
4713     disabled libxcb_xfixes ||
4714         check_pkg_config libxcb_xfixes xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image
4715 fi
4716
4717 # d3d11va requires linking directly to dxgi and d3d11 if not building for
4718 # the desktop api partition
4719 check_cpp <<EOF && enable uwp && d3d11va_extralibs="-ldxgi -ld3d11"
4720 #ifdef WINAPI_FAMILY
4721 #include <winapifamily.h>
4722 #if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4723 #error desktop, not uwp
4724 #else
4725 // WINAPI_FAMILY_APP, WINAPI_FAMILY_PHONE_APP => UWP
4726 #endif
4727 #else
4728 #error no family set
4729 #endif
4730 EOF
4731
4732 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4733
4734 enabled vaapi &&
4735     check_code cc "va/va.h" "vaCreateSurfaces(0, 0, 0, 0, 0, 0, 0, 0)" ||
4736     disable vaapi
4737
4738 enabled vaapi &&
4739     check_lib vaapi_drm "va/va.h va/va_drm.h" vaGetDisplayDRM -lva -lva-drm
4740
4741 enabled vaapi &&
4742     check_lib vaapi_x11 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 -lX11
4743
4744 enabled vaapi &&
4745     check_cpp_condition "va/va.h" "VA_CHECK_VERSION(1, 0, 0)" &&
4746     enable vaapi_1
4747
4748 enabled vdpau &&
4749     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4750     disable vdpau
4751
4752 enabled vdpau &&
4753     check_lib vdpau_x11 "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau -lX11
4754
4755 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4756
4757 # add some useful compiler flags if supported
4758 check_cflags -Wdeclaration-after-statement
4759 check_cflags -Wall
4760 check_cflags -Wdisabled-optimization
4761 check_cflags -Wpointer-arith
4762 check_cflags -Wredundant-decls
4763 check_cflags -Wwrite-strings
4764 check_cflags -Wtype-limits
4765 check_cflags -Wundef
4766 check_cflags -Wmissing-prototypes
4767 check_cflags -Wstrict-prototypes
4768
4769 if enabled extra_warnings; then
4770     check_cflags -Wcast-qual
4771     check_cflags -Wextra
4772     check_cflags -Wpedantic
4773 fi
4774
4775 check_disable_warning(){
4776     warning_flag=-W${1#-Wno-}
4777     test_cflags $warning_flag && add_cflags $1
4778 }
4779
4780 check_disable_warning -Wno-parentheses
4781 check_disable_warning -Wno-switch
4782 check_disable_warning -Wno-format-zero-length
4783 check_disable_warning -Wno-pointer-sign
4784
4785 check_disable_warning_headers(){
4786     warning_flag=-W${1#-Wno-}
4787     test_cflags $warning_flag && add_cflags_headers $1
4788 }
4789
4790 check_disable_warning_headers -Wno-deprecated-declarations
4791 check_disable_warning_headers -Wno-unused-variable
4792
4793 check_objcflags -fobjc-arc && enable objc_arc
4794
4795 check_cc <<EOF && enable blocks_extension
4796 void (^block)(void);
4797 EOF
4798
4799 # add some linker flags
4800 check_ldflags -Wl,--warn-common
4801 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4802 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir && add_ldsoflags -Wl,-rpath,$libdir
4803 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
4804
4805 # add some strip flags
4806 # -wN '..@*' is more selective than -x, but not available everywhere.
4807 check_stripflags -wN \'..@*\' || check_stripflags -x || strip='true'
4808
4809 enabled neon_clobber_test &&
4810     check_ldflags -Wl,--wrap,avcodec_open2              \
4811                   -Wl,--wrap,avcodec_decode_audio4      \
4812                   -Wl,--wrap,avcodec_decode_video2      \
4813                   -Wl,--wrap,avcodec_decode_subtitle2   \
4814                   -Wl,--wrap,avcodec_encode_audio2      \
4815                   -Wl,--wrap,avcodec_encode_video2      \
4816                   -Wl,--wrap,avcodec_encode_subtitle    \
4817                   -Wl,--wrap,avcodec_send_packet        \
4818                   -Wl,--wrap,avcodec_receive_packet     \
4819                   -Wl,--wrap,avcodec_send_frame         \
4820                   -Wl,--wrap,avcodec_receive_frame      \
4821                   -Wl,--wrap,avresample_convert ||
4822     disable neon_clobber_test
4823
4824 enabled xmm_clobber_test &&
4825     check_ldflags -Wl,--wrap,avcodec_open2              \
4826                   -Wl,--wrap,avcodec_decode_audio4      \
4827                   -Wl,--wrap,avcodec_decode_video2      \
4828                   -Wl,--wrap,avcodec_decode_subtitle2   \
4829                   -Wl,--wrap,avcodec_encode_audio2      \
4830                   -Wl,--wrap,avcodec_encode_video2      \
4831                   -Wl,--wrap,avcodec_encode_subtitle    \
4832                   -Wl,--wrap,avcodec_send_packet        \
4833                   -Wl,--wrap,avcodec_receive_packet     \
4834                   -Wl,--wrap,avcodec_send_frame         \
4835                   -Wl,--wrap,avcodec_receive_frame      \
4836                   -Wl,--wrap,avresample_convert         \
4837                   -Wl,--wrap,sws_scale ||
4838     disable xmm_clobber_test
4839
4840 check_ld <<EOF && enable proper_dce
4841 extern const int array[512];
4842 static inline int func(void) { return array[0]; }
4843 int main(void) { return 0; }
4844 EOF
4845
4846 if enabled proper_dce; then
4847     echo "X { local: *; };" > $TMPV
4848     if test_ldflags -Wl,${version_script},$TMPV; then
4849         append SHFLAGS '-Wl,${version_script},\$(SUBDIR)lib\$(NAME).ver'
4850         quotes='""'
4851         check_cc <<EOF && enable symver_asm_label
4852 void ff_foo(void) __asm__ ("av_foo@VERSION");
4853 void ff_foo(void) { ${inline_asm+__asm__($quotes);} }
4854 EOF
4855         check_cc <<EOF && enable symver_gnu_asm
4856 __asm__(".symver ff_foo,av_foo@VERSION");
4857 void ff_foo(