configure: Simplify restrict keyword handling
[ffmpeg.git] / configure
1 #!/bin/sh
2 #
3 # Libav configure script
4 #
5 # Copyright (c) 2000-2002 Fabrice Bellard
6 # Copyright (c) 2005-2008 Diego Biurrun
7 # Copyright (c) 2005-2008 Mans Rullgard
8 #
9
10 # Prevent locale nonsense from breaking basic text processing.
11 LC_ALL=C
12 export LC_ALL
13
14 # make sure we are running under a compatible shell
15 # try to make this part work with most shells
16
17 try_exec(){
18     echo "Trying shell $1"
19     type "$1" > /dev/null 2>&1 && exec "$@"
20 }
21
22 unset foo
23 (: ${foo%%bar}) 2> /dev/null
24 E1="$?"
25
26 (: ${foo?}) 2> /dev/null
27 E2="$?"
28
29 if test "$E1" != 0 || test "$E2" = 0; then
30     echo "Broken shell detected.  Trying alternatives."
31     export FF_CONF_EXEC
32     if test "0$FF_CONF_EXEC" -lt 1; then
33         FF_CONF_EXEC=1
34         try_exec bash "$0" "$@"
35     fi
36     if test "0$FF_CONF_EXEC" -lt 2; then
37         FF_CONF_EXEC=2
38         try_exec ksh "$0" "$@"
39     fi
40     if test "0$FF_CONF_EXEC" -lt 3; then
41         FF_CONF_EXEC=3
42         try_exec /usr/xpg4/bin/sh "$0" "$@"
43     fi
44     echo "No compatible shell script interpreter found."
45     echo "This configure script requires a POSIX-compatible shell"
46     echo "such as bash or ksh."
47     echo "THIS IS NOT A BUG IN LIBAV, DO NOT REPORT IT AS SUCH."
48     echo "Instead, install a working POSIX-compatible shell."
49     echo "Disabling this configure test will create a broken Libav."
50     if test "$BASH_VERSION" = '2.04.0(1)-release'; then
51         echo "This bash version ($BASH_VERSION) is broken on your platform."
52         echo "Upgrade to a later version if available."
53     fi
54     exit 1
55 fi
56
57 test -d /usr/xpg4/bin && PATH=/usr/xpg4/bin:$PATH
58
59 show_help(){
60     cat <<EOF
61 Usage: configure [options]
62 Options: [defaults in brackets after descriptions]
63
64 Help options:
65   --help                   print this message
66   --quiet                  Suppress showing informative output
67   --list-decoders          show all available decoders
68   --list-encoders          show all available encoders
69   --list-hwaccels          show all available hardware accelerators
70   --list-demuxers          show all available demuxers
71   --list-muxers            show all available muxers
72   --list-parsers           show all available parsers
73   --list-protocols         show all available protocols
74   --list-bsfs              show all available bitstream filters
75   --list-indevs            show all available input devices
76   --list-filters           show all available filters
77
78 Standard options:
79   --logfile=FILE           log tests and output to FILE [avbuild/config.log]
80   --disable-logging        do not log configure debug information
81   --prefix=PREFIX          install in PREFIX [$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-amf     AMF video encoding code [auto]
235   --enable-cuda    Nvidia CUDA (dynamically linked)
236   --enable-cuvid   Nvidia CUVID video decode acceleration
237   --enable-d3d11va Microsoft Direct3D 11 video acceleration [auto]
238   --enable-dxva2   Microsoft DirectX 9 video acceleration [auto]
239   --enable-libmfx  Intel MediaSDK (AKA Quick Sync Video)
240   --enable-libnpp  Nvidia CUDA processing
241   --enable-mmal    Broadcom Multi-Media Abstraction Layer (Raspberry Pi)
242   --enable-nvenc   Nvidia video encoding
243   --enable-omx     OpenMAX IL
244   --enable-omx-rpi OpenMAX IL for Raspberry Pi
245   --enable-vaapi   Video Acceleration API (mainly Unix/Intel)
246   --enable-vda     Apple Video Decode Acceleration [auto]
247   --enable-vdpau   Nvidia Video Decode and Presentation API for Unix [auto]
248
249 Toolchain options:
250   --arch=ARCH              select architecture [$arch]
251   --cpu=CPU                select the minimum required CPU (affects
252                            instruction selection, may crash on older CPUs)
253   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
254   --enable-cross-compile   assume a cross-compiler is used
255   --sysroot=PATH           root of cross-build tree
256   --sysinclude=PATH        location of cross-build system headers
257   --target-os=OS           compiler targets OS [$target_os]
258   --target-exec=CMD        command to run executables on target
259   --target-path=DIR        path to view of build directory on target
260   --target-samples=DIR     path to samples directory on target
261   --toolchain=NAME         set tool defaults according to NAME
262   --nm=NM                  use nm tool
263   --ar=AR                  use archive tool AR [$ar_default]
264   --as=AS                  use assembler AS [$as_default]
265   --cc=CC                  use C compiler CC [$cc_default]
266   --objcc=OCC              use ObjC compiler OCC [$cc_default]
267   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
268   --ld=LD                  use linker LD
269   --x86asmexe=X86ASM       use x86 assembler X86ASM
270   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
271   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
272   --host-cc=HOSTCC         use host C compiler HOSTCC
273   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
274   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
275   --host-ld=HOSTLD         use host linker HOSTLD
276   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
277   --host-libs=HLIBS        use libs HLIBS when linking for host
278   --host-os=OS             compiler host OS [$target_os]
279   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
280   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
281   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
282   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
283   --extra-ldsoflags=ELDFLAGS add ELDFLAGS to LDSOFLAGS [$LDSOFLAGS]
284   --extra-libs=ELIBS       add ELIBS [$ELIBS]
285   --extra-version=STRING   version string suffix []
286   --optflags=OPTFLAGS      override optimization-related compiler flags
287   --enable-pic             build position-independent code
288   --enable-thumb           compile for Thumb instruction set
289   --enable-lto             use link-time optimization
290   --env="ENV=override"     override the environment variables
291
292 Advanced options (experts only):
293   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
294   --custom-allocator=NAME  use a supported custom allocator
295   --disable-symver         disable symbol versioning
296   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
297   --disable-safe-bitstream-reader
298                            disable buffer boundary checking in bitreaders
299                            (faster, but may crash)
300   --enable-sram            allow use of on-chip SRAM
301
302 Optimization options (experts only):
303   --disable-asm            disable all assembly optimizations
304   --disable-altivec        disable AltiVec optimizations
305   --disable-vsx            disable VSX optimizations
306   --disable-power8         disable POWER8 optimizations
307   --disable-amd3dnow       disable 3DNow! optimizations
308   --disable-amd3dnowext    disable 3DNow! extended optimizations
309   --disable-mmx            disable MMX optimizations
310   --disable-mmxext         disable MMXEXT optimizations
311   --disable-sse            disable SSE optimizations
312   --disable-sse2           disable SSE2 optimizations
313   --disable-sse3           disable SSE3 optimizations
314   --disable-ssse3          disable SSSE3 optimizations
315   --disable-sse4           disable SSE4 optimizations
316   --disable-sse42          disable SSE4.2 optimizations
317   --disable-avx            disable AVX optimizations
318   --disable-xop            disable XOP optimizations
319   --disable-fma3           disable FMA3 optimizations
320   --disable-fma4           disable FMA4 optimizations
321   --disable-avx2           disable AVX2 optimizations
322   --disable-armv5te        disable armv5te optimizations
323   --disable-armv6          disable armv6 optimizations
324   --disable-armv6t2        disable armv6t2 optimizations
325   --disable-vfp            disable VFP optimizations
326   --disable-neon           disable NEON optimizations
327   --disable-inline-asm     disable use of inline assembly
328   --disable-x86asm         disable use of standalone x86 assembly
329
330 Developer options (useful when working on Libav itself):
331   --disable-debug          disable debugging symbols
332   --enable-debug=LEVEL     set the debug level [$debuglevel]
333   --disable-optimizations  disable compiler optimizations
334   --enable-extra-warnings  enable more compiler warnings
335   --samples=PATH           location of test samples for FATE, if not set use
336                            \$LIBAV_SAMPLES at make invocation time.
337   --enable-neon-clobber-test check NEON registers for clobbering (should be
338                            used only for debugging purposes)
339   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
340                            should be used only for debugging purposes)
341   --disable-valgrind-backtrace do not print a backtrace under Valgrind
342                            (only applies to --disable-optimizations builds)
343   --ignore-tests=TESTS     comma-separated list (without "fate-" prefix
344                            in the name) of tests whose result is ignored
345
346 NOTE: Object files are built at the place where configure is launched.
347 EOF
348   exit 0
349 }
350
351 log(){
352     echo "$@" >> $logfile
353 }
354
355 log_file(){
356     log BEGIN $1
357     i=1
358     while read line; do
359         printf '%5s   %s\n' "${i}" "${line}"
360         i=$(($i+1))
361     done < $1 >> $logfile
362     log END $1
363 }
364
365 echolog(){
366     log "$@"
367     echo "$@"
368 }
369
370 warn(){
371     log "WARNING: $*"
372     WARNINGS="${WARNINGS}WARNING: $*\n"
373 }
374
375 die(){
376     echolog "$@"
377     cat <<EOF
378
379 If you think configure made a mistake, make sure you are using the latest
380 version from Git.  If the latest version fails, report the problem to the
381 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
382 EOF
383     if disabled logging; then
384         cat <<EOF
385 Rerun configure with logging enabled (do not use --disable-logging), and
386 include the log this produces with your report.
387 EOF
388     else
389         cat <<EOF
390 Include the log file "$logfile" produced by configure as this will help
391 solving the problem.
392 EOF
393     fi
394     exit 1
395 }
396
397 # Avoid locale weirdness, besides we really just want to translate ASCII.
398 toupper(){
399     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
400 }
401
402 tolower(){
403     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
404 }
405
406 c_escape(){
407     echo "$*" | sed 's/["\\]/\\\0/g'
408 }
409
410 sh_quote(){
411     v=$(echo "$1" | sed "s/'/'\\\\''/g")
412     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
413     echo "$v"
414 }
415
416 cleanws(){
417     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
418 }
419
420 filter(){
421     pat=$1
422     shift
423     for v; do
424         eval "case '$v' in $pat) printf '%s ' '$v' ;; esac"
425     done
426 }
427
428 filter_out(){
429     pat=$1
430     shift
431     for v; do
432         eval "case '$v' in $pat) ;; *) printf '%s ' '$v' ;; esac"
433     done
434 }
435
436 map(){
437     m=$1
438     shift
439     for v; do eval $m; done
440 }
441
442 add_suffix(){
443     suffix=$1
444     shift
445     for v; do echo ${v}${suffix}; done
446 }
447
448 set_all(){
449     value=$1
450     shift
451     for var in $*; do
452         eval $var=$value
453     done
454 }
455
456 set_weak(){
457     value=$1
458     shift
459     for var; do
460         eval : \${$var:=$value}
461     done
462 }
463
464 sanitize_var_name(){
465     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
466 }
467
468 set_sanitized(){
469     var=$1
470     shift
471     eval $(sanitize_var_name "$var")='$*'
472 }
473
474 get_sanitized(){
475     eval echo \$$(sanitize_var_name "$1")
476 }
477
478 pushvar(){
479     for pvar in $*; do
480         eval level=\${${pvar}_level:=0}
481         eval ${pvar}_${level}="\$$pvar"
482         eval ${pvar}_level=$(($level+1))
483     done
484 }
485
486 popvar(){
487     for pvar in $*; do
488         eval level=\${${pvar}_level:-0}
489         test $level = 0 && continue
490         eval level=$(($level-1))
491         eval $pvar="\${${pvar}_${level}}"
492         eval ${pvar}_level=$level
493         eval unset ${pvar}_${level}
494     done
495 }
496
497 enable(){
498     set_all yes $*
499 }
500
501 disable(){
502     set_all no $*
503 }
504
505 enable_weak(){
506     set_weak yes $*
507 }
508
509 disable_weak(){
510     set_weak no $*
511 }
512
513 enable_sanitized(){
514     for var; do
515         enable $(sanitize_var_name $var)
516     done
517 }
518
519 disable_sanitized(){
520     for var; do
521         disable $(sanitize_var_name $var)
522     done
523 }
524
525 do_enable_deep(){
526     for var; do
527         enabled $var && continue
528         eval sel="\$${var}_select"
529         eval sgs="\$${var}_suggest"
530         pushvar var sgs
531         enable_deep $sel
532         popvar sgs
533         enable_deep_weak $sgs
534         popvar var
535     done
536 }
537
538 enable_deep(){
539     do_enable_deep $*
540     enable $*
541 }
542
543 enable_deep_weak(){
544     for var; do
545         disabled $var && continue
546         pushvar var
547         do_enable_deep $var
548         popvar var
549         enable_weak $var
550     done
551 }
552
553 enabled(){
554     test "${1#!}" = "$1" && op="=" || op="!="
555     eval test "x\$${1#!}" $op "xyes"
556 }
557
558 disabled(){
559     test "${1#!}" = "$1" && op="=" || op="!="
560     eval test "x\$${1#!}" $op "xno"
561 }
562
563 enabled_all(){
564     for opt; do
565         enabled $opt || return 1
566     done
567 }
568
569 disabled_all(){
570     for opt; do
571         disabled $opt || return 1
572     done
573 }
574
575 enabled_any(){
576     for opt; do
577         enabled $opt && return 0
578     done
579 }
580
581 disabled_any(){
582     for opt; do
583         disabled $opt && return 0
584     done
585     return 1
586 }
587
588 set_default(){
589     for opt; do
590         eval : \${$opt:=\$${opt}_default}
591     done
592 }
593
594 is_in(){
595     value=$1
596     shift
597     for var in $*; do
598         [ $var = $value ] && return 0
599     done
600     return 1
601 }
602
603 check_deps(){
604     for cfg; do
605         enabled ${cfg}_checking && die "Circular dependency for $cfg."
606         disabled ${cfg}_checking && continue
607         enable ${cfg}_checking
608
609         eval dep_all="\$${cfg}_deps"
610         eval dep_any="\$${cfg}_deps_any"
611         eval dep_con="\$${cfg}_conflict"
612         eval dep_sel="\$${cfg}_select"
613         eval dep_sgs="\$${cfg}_suggest"
614         eval dep_ifa="\$${cfg}_if"
615         eval dep_ifn="\$${cfg}_if_any"
616
617         pushvar cfg dep_all dep_any dep_con dep_sel dep_sgs dep_ifa dep_ifn
618         check_deps $dep_all $dep_any $dep_con $dep_sel $dep_sgs $dep_ifa $dep_ifn
619         popvar cfg dep_all dep_any dep_con dep_sel dep_sgs dep_ifa dep_ifn
620
621         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
622         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
623         enabled_all  $dep_all || disable $cfg
624         enabled_any  $dep_any || disable $cfg
625         disabled_all $dep_con || disable $cfg
626         disabled_any $dep_sel && disable $cfg
627
628         enabled $cfg && enable_deep_weak $dep_sel $dep_sgs
629
630         for dep in $dep_all $dep_any $dep_sel $dep_sgs; do
631             # filter out library deps, these do not belong in extralibs
632             is_in $dep $LIBRARY_LIST && continue
633             enabled $dep && eval append ${cfg}_extralibs ${dep}_extralibs
634         done
635
636         disable ${cfg}_checking
637     done
638 }
639
640 print_config(){
641     pfx=$1
642     files=$2
643     shift 2
644     map 'eval echo "$v \${$v:-no}"' "$@" |
645     awk "BEGIN { split(\"$files\", files) }
646         {
647             c = \"$pfx\" toupper(\$1);
648             v = \$2;
649             sub(/yes/, 1, v);
650             sub(/no/,  0, v);
651             for (f in files) {
652                 file = files[f];
653                 if (file ~ /\\.h\$/) {
654                     printf(\"#define %s %d\\n\", c, v) >>file;
655                 } else if (file ~ /\\.asm\$/) {
656                     printf(\"%%define %s %d\\n\", c, v) >>file;
657                 } else if (file ~ /\\.mak\$/) {
658                     n = -v ? \"\" : \"!\";
659                     printf(\"%s%s=yes\\n\", n, c) >>file;
660                 }
661             }
662         }"
663 }
664
665 print_enabled(){
666     suf=$1
667     shift
668     for v; do
669         enabled $v && printf "%s\n" ${v%$suf}
670     done
671 }
672
673 append(){
674     var=$1
675     shift
676     eval "$var=\"\$$var $*\""
677 }
678
679 prepend(){
680     var=$1
681     shift
682     eval "$var=\"$* \$$var\""
683 }
684
685 unique(){
686     var=$1
687     uniq_list=""
688     for tok in $(eval echo \$$var); do
689         uniq_list="$(filter_out $tok $uniq_list) $tok"
690     done
691     eval "$var=\"${uniq_list}\""
692 }
693
694 resolve(){
695     var=$1
696     tmpvar=
697     for entry in $(eval echo \$$var); do
698         tmpvar="$tmpvar $(eval echo \$${entry})"
699     done
700     eval "$var=\"${tmpvar}\""
701 }
702
703 add_cppflags(){
704     append CPPFLAGS "$@"
705 }
706
707 add_cflags(){
708     append CFLAGS $($cflags_filter "$@")
709 }
710
711 add_cflags_headers(){
712     append CFLAGS_HEADERS $($cflags_filter "$@")
713 }
714
715 add_asflags(){
716     append ASFLAGS $($asflags_filter "$@")
717 }
718
719 add_objcflags(){
720     append OBJCFLAGS $($objcflags_filter "$@")
721 }
722
723 add_ldflags(){
724     append LDFLAGS $($ldflags_filter "$@")
725 }
726
727 add_ldexeflags(){
728     append LDEXEFLAGS $($ldflags_filter "$@")
729 }
730
731 add_ldsoflags(){
732     append LDSOFLAGS $($ldflags_filter "$@")
733 }
734
735 add_stripflags(){
736     append STRIPFLAGS "$@"
737 }
738
739 add_extralibs(){
740     prepend extralibs $($ldflags_filter "$@")
741 }
742
743 add_host_cppflags(){
744     append host_cppflags "$@"
745 }
746
747 add_host_cflags(){
748     append host_cflags $($host_cflags_filter "$@")
749 }
750
751 add_host_ldflags(){
752     append host_ldflags $($host_ldflags_filter "$@")
753 }
754
755 add_compat(){
756     append compat_objs $1
757     shift
758     map 'add_cppflags -D$v' "$@"
759 }
760
761 check_cmd(){
762     log "$@"
763     "$@" >> $logfile 2>&1
764 }
765
766 cc_o(){
767     eval printf '%s\\n' $CC_O
768 }
769
770 cc_e(){
771     eval printf '%s\\n' $CC_E
772 }
773
774 check_cc(){
775     log check_cc "$@"
776     cat > $TMPC
777     log_file $TMPC
778     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
779 }
780
781 check_objcc(){
782     log check_objcc "$@"
783     cat > $TMPC
784     log_file $TMPC
785     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
786 }
787
788 check_cpp(){
789     log check_cpp "$@"
790     cat > $TMPC
791     log_file $TMPC
792     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
793 }
794
795 as_o(){
796     eval printf '%s\\n' $AS_O
797 }
798
799 check_as(){
800     log check_as "$@"
801     cat > $TMPS
802     log_file $TMPS
803     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
804 }
805
806 check_inline_asm(){
807     log check_inline_asm "$@"
808     name="$1"
809     code="$2"
810     shift 2
811     disable $name
812     check_cc "$@" <<EOF && enable $name
813 void foo(void){ __asm__ volatile($code); }
814 EOF
815 }
816
817 check_insn(){
818     log check_insn "$@"
819     check_inline_asm ${1}_inline "\"$2\""
820     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
821 }
822
823 check_x86asm(){
824     log check_x86asm "$@"
825     echo "$1" > $TMPS
826     log_file $TMPS
827     shift 1
828     check_cmd $x86asmexe $X86ASMFLAGS "$@" -o $TMPO $TMPS
829 }
830
831 ld_o(){
832     eval printf '%s\\n' $LD_O
833 }
834
835 check_ld(){
836     log check_ld "$@"
837     flags=$(filter_out '-l*' "$@")
838     libs=$(filter '-l*' "$@")
839     check_cc $($cflags_filter $flags) || return
840     flags=$($ldflags_filter $flags)
841     libs=$($ldflags_filter $libs)
842     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
843 }
844
845 print_include(){
846     hdr=$1
847     test "${hdr%.h}" = "${hdr}" &&
848         echo "#include $hdr"    ||
849         echo "#include <$hdr>"
850 }
851
852 check_code(){
853     log check_code "$@"
854     check=$1
855     headers=$2
856     code=$3
857     shift 3
858     {
859         for hdr in $headers; do
860             print_include $hdr
861         done
862         echo "int main(void) { $code; return 0; }"
863     } | check_$check "$@"
864 }
865
866 check_cppflags(){
867     log check_cppflags "$@"
868     check_cpp "$@" <<EOF && append CPPFLAGS "$@"
869 #include <stdlib.h>;
870 EOF
871 }
872
873 test_cflags(){
874     log test_cflags "$@"
875     set -- $($cflags_filter "$@")
876     check_cc "$@" <<EOF
877 int x;
878 EOF
879 }
880
881 check_cflags(){
882     log check_cflags "$@"
883     test_cflags "$@" && add_cflags "$@"
884 }
885
886 test_objcflags(){
887     log test_objcflags "$@"
888     set -- $($objcflags_filter "$@")
889     check_objcc "$@" <<EOF
890 int x;
891 EOF
892 }
893
894 check_objcflags(){
895     log check_objcflags "$@"
896     test_objcflags "$@" && add_objcflags "$@"
897 }
898
899 test_ldflags(){
900     log test_ldflags "$@"
901     set -- $($ldflags_filter "$@")
902     check_ld "$@" <<EOF
903 int main(void){ return 0; }
904 EOF
905 }
906
907 check_ldflags(){
908     log check_ldflags "$@"
909     test_ldflags "$@" && add_ldflags "$@"
910 }
911
912 test_stripflags(){
913     log test_stripflags "$@"
914     # call check_cc to get a fresh TMPO
915     check_cc <<EOF
916 int main(void) { return 0; }
917 EOF
918     check_cmd $strip $STRIPFLAGS "$@" $TMPO
919 }
920
921 check_stripflags(){
922     log check_stripflags "$@"
923     test_stripflags "$@" && add_stripflags "$@"
924 }
925
926 check_header(){
927     log check_header "$@"
928     headers=$1
929     shift
930     disable_sanitized $headers
931     {
932         for hdr in $headers; do
933             print_include $hdr
934         done
935         echo "int x;"
936     } | check_cpp "$@" && enable_sanitized $headers
937 }
938
939 check_func(){
940     log check_func "$@"
941     func=$1
942     shift
943     disable $func
944     check_ld "$@" <<EOF && enable $func
945 extern int $func();
946 int main(void){ $func(); }
947 EOF
948 }
949
950 check_mathfunc(){
951     log check_mathfunc "$@"
952     func=$1
953     narg=$2
954     shift 2
955     test $narg = 2 && args="f, g" || args="f"
956     disable $func
957     check_ld "$@" <<EOF && enable $func
958 #include <math.h>
959 float foo(float f, float g) { return $func($args); }
960 int main(void){ return 0; }
961 EOF
962 }
963
964 check_func_headers(){
965     log check_func_headers "$@"
966     headers=$1
967     funcs=$2
968     shift 2
969     {
970         for hdr in $headers; do
971             print_include $hdr
972         done
973         for func in $funcs; do
974             echo "long check_$func(void) { return (long) $func; }"
975         done
976         echo "int main(void) { return 0; }"
977     } | check_ld "$@" && enable $funcs && enable_sanitized $headers
978 }
979
980 check_cpp_condition(){
981     log check_cpp_condition "$@"
982     header=$1
983     condition=$2
984     shift 2
985     check_cpp "$@" <<EOF
986 #include <$header>
987 #if !($condition)
988 #error "unsatisfied condition: $condition"
989 #endif
990 EOF
991 }
992
993 test_cflags_cpp(){
994     log test_cflags_cpp "$@"
995     flags=$1
996     condition=$2
997     shift 2
998     set -- $($cflags_filter "$flags")
999     check_cpp "$@" <<EOF
1000 #if !($condition)
1001 #error "unsatisfied condition: $condition"
1002 #endif
1003 EOF
1004 }
1005
1006 check_lib(){
1007     log check_lib "$@"
1008     name="$1"
1009     headers="$2"
1010     funcs="$3"
1011     shift 3
1012     disable $name
1013     check_func_headers "$headers" "$funcs" "$@" &&
1014         enable $name && eval ${name}_extralibs="\$@"
1015 }
1016
1017 test_pkg_config(){
1018     log test_pkg_config "$@"
1019     name="$1"
1020     pkg_version="$2"
1021     pkg="${2%% *}"
1022     headers="$3"
1023     funcs="$4"
1024     shift 4
1025     disable $name
1026     check_cmd $pkg_config --exists --print-errors $pkg_version || return
1027     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1028     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1029     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1030         enable $name &&
1031         set_sanitized "${name}_cflags"    $pkg_cflags &&
1032         set_sanitized "${name}_extralibs" $pkg_libs
1033 }
1034
1035 check_pkg_config(){
1036     log check_pkg_config "$@"
1037     name="$1"
1038     test_pkg_config "$@" &&
1039         eval add_cflags \$${name}_cflags
1040 }
1041
1042 check_exec(){
1043     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1044 }
1045
1046 check_exec_crash(){
1047     log check_exec_crash "$@"
1048     code=$(cat)
1049
1050     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1051     # are safe but may not be available everywhere.  Thus we use
1052     # raise(SIGTERM) instead.  The check is run in a subshell so we
1053     # can redirect the "Terminated" message from the shell.  SIGBUS
1054     # is not defined by standard C so it is used conditionally.
1055
1056     (check_exec "$@") >> $logfile 2>&1 <<EOF
1057 #include <signal.h>
1058 static void sighandler(int sig){
1059     raise(SIGTERM);
1060 }
1061 int foo(void){
1062     $code
1063 }
1064 int (*func_ptr)(void) = foo;
1065 int main(void){
1066     signal(SIGILL, sighandler);
1067     signal(SIGFPE, sighandler);
1068     signal(SIGSEGV, sighandler);
1069 #ifdef SIGBUS
1070     signal(SIGBUS, sighandler);
1071 #endif
1072     return func_ptr();
1073 }
1074 EOF
1075 }
1076
1077 check_type(){
1078     log check_type "$@"
1079     headers=$1
1080     type=$2
1081     shift 2
1082     disable_sanitized "$type"
1083     check_code cc "$headers" "$type v" "$@" && enable_sanitized "$type"
1084 }
1085
1086 check_struct(){
1087     log check_struct "$@"
1088     headers=$1
1089     struct=$2
1090     member=$3
1091     shift 3
1092     disable_sanitized "${struct}_${member}"
1093     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1094         enable_sanitized "${struct}_${member}"
1095 }
1096
1097 check_builtin(){
1098     log check_builtin "$@"
1099     name=$1
1100     headers=$2
1101     builtin=$3
1102     shift 3
1103     disable "$name"
1104     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1105 }
1106
1107 check_compile_assert(){
1108     log check_compile_assert "$@"
1109     name=$1
1110     headers=$2
1111     condition=$3
1112     shift 3
1113     disable "$name"
1114     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1115 }
1116
1117 require(){
1118     log require "$@"
1119     name_version="$1"
1120     name="${1%% *}"
1121     headers="$2"
1122     func="$3"
1123     shift 3
1124     check_lib $name "$headers" $func "$@" || die "ERROR: $name_version not found"
1125 }
1126
1127 require_header(){
1128     log require_header "$@"
1129     headers="$1"
1130     shift
1131     check_header "$headers" "$@" || die "ERROR: $headers not found"
1132 }
1133
1134 require_cpp_condition(){
1135     log require_cpp_condition "$@"
1136     header="$1"
1137     condition="$2"
1138     shift 2
1139     check_cpp_condition "$header" "$condition" "$@" || die "ERROR: $condition not satisfied"
1140 }
1141
1142 require_pkg_config(){
1143     log require_pkg_config "$@"
1144     pkg_version="$2"
1145     check_pkg_config "$@" || die "ERROR: $pkg_version not found"
1146 }
1147
1148 hostcc_e(){
1149     eval printf '%s\\n' $HOSTCC_E
1150 }
1151
1152 hostcc_o(){
1153     eval printf '%s\\n' $HOSTCC_O
1154 }
1155
1156 check_host_cc(){
1157     log check_host_cc "$@"
1158     cat > $TMPC
1159     log_file $TMPC
1160     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1161 }
1162
1163 check_host_cpp(){
1164     log check_host_cpp "$@"
1165     cat > $TMPC
1166     log_file $TMPC
1167     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1168 }
1169
1170 check_host_cppflags(){
1171     log check_host_cppflags "$@"
1172     check_host_cpp "$@" <<EOF && append host_cppflags "$@"
1173 #include <stdlib.h>;
1174 EOF
1175 }
1176
1177 check_host_cflags(){
1178     log check_host_cflags "$@"
1179     set -- $($host_cflags_filter "$@")
1180     check_host_cc "$@" <<EOF && append host_cflags "$@"
1181 int x;
1182 EOF
1183 }
1184
1185 check_host_cpp_condition(){
1186     log check_host_cpp_condition "$@"
1187     header=$1
1188     condition=$2
1189     shift 2
1190     check_host_cpp "$@" <<EOF
1191 #include <$header>
1192 #if !($condition)
1193 #error "unsatisfied condition: $condition"
1194 #endif
1195 EOF
1196 }
1197
1198 cp_if_changed(){
1199     cmp -s "$1" "$2" && { test "$quiet" != "yes" && echo "$2 is unchanged"; } && return
1200     mkdir -p "$(dirname $2)"
1201     cp -f "$1" "$2"
1202 }
1203
1204 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1205 # system-dependent things.
1206
1207 AVCODEC_COMPONENTS="
1208     bsfs
1209     decoders
1210     encoders
1211     hwaccels
1212     parsers
1213 "
1214
1215 AVDEVICE_COMPONENTS="
1216     indevs
1217 "
1218 AVFILTER_COMPONENTS="
1219     filters
1220 "
1221 AVFORMAT_COMPONENTS="
1222     demuxers
1223     muxers
1224     protocols
1225 "
1226
1227 COMPONENT_LIST="
1228     $AVCODEC_COMPONENTS
1229     $AVDEVICE_COMPONENTS
1230     $AVFILTER_COMPONENTS
1231     $AVFORMAT_COMPONENTS
1232 "
1233
1234 EXAMPLE_LIST="
1235     decode_audio_example
1236     decode_video_example
1237     encode_audio_example
1238     encode_video_example
1239     filter_audio_example
1240     metadata_example
1241     output_example
1242     qsvdec_example
1243     transcode_aac_example
1244 "
1245
1246 # catchall list of things that require external libs to link
1247 EXTRALIBS_LIST="
1248     cpu_init
1249     cws2fws
1250 "
1251
1252 HWACCEL_LIBRARY_NONFREE_LIST="
1253     cuda
1254     cuvid
1255     libnpp
1256 "
1257 HWACCEL_LIBRARY_LIST="
1258     $HWACCEL_LIBRARY_NONFREE_LIST
1259     amf
1260     d3d11va
1261     dxva2
1262     libmfx
1263     mmal
1264     nvenc
1265     omx
1266     vaapi
1267     vda
1268     vdpau
1269 "
1270
1271 EXTERNAL_LIBRARY_GPL_LIST="
1272     libcdio
1273     libx264
1274     libx265
1275     libxavs
1276     libxvid
1277 "
1278
1279 EXTERNAL_LIBRARY_NONFREE_LIST="
1280     libfaac
1281     libfdk_aac
1282     openssl
1283 "
1284
1285 EXTERNAL_LIBRARY_VERSION3_LIST="
1286     libopencore_amrnb
1287     libopencore_amrwb
1288     libvo_aacenc
1289     libvo_amrwbenc
1290 "
1291
1292 EXTERNAL_LIBRARY_LIST="
1293     $EXTERNAL_LIBRARY_GPL_LIST
1294     $EXTERNAL_LIBRARY_NONFREE_LIST
1295     $EXTERNAL_LIBRARY_VERSION3_LIST
1296     avisynth
1297     avxsynth
1298     frei0r
1299     gnutls
1300     libbs2b
1301     libdc1394
1302     libdcadec
1303     libfontconfig
1304     libfreetype
1305     libgsm
1306     libhdcd
1307     libilbc
1308     libjack
1309     libkvazaar
1310     libmp3lame
1311     libopencv
1312     libopenh264
1313     libopenjpeg
1314     libopus
1315     libpulse
1316     librtmp
1317     libschroedinger
1318     libsnappy
1319     libspeex
1320     libtheora
1321     libtwolame
1322     libvorbis
1323     libvpx
1324     libwavpack
1325     libwebp
1326     libxcb
1327     libxcb_shm
1328     libxcb_xfixes
1329 "
1330
1331 SYSTEM_LIBRARY_LIST="
1332     bzlib
1333     zlib
1334 "
1335
1336 FEATURE_LIST="
1337     gray
1338     hardcoded_tables
1339     omx_rpi
1340     runtime_cpudetect
1341     safe_bitstream_reader
1342     shared
1343     small
1344     sram
1345     static
1346     swscale_alpha
1347 "
1348
1349 LIBRARY_LIST="
1350     avcodec
1351     avdevice
1352     avfilter
1353     avformat
1354     avresample
1355     avutil
1356     swscale
1357 "
1358
1359 LICENSE_LIST="
1360     gpl
1361     nonfree
1362     version3
1363 "
1364
1365 PROGRAM_LIST="
1366     avconv
1367     avplay
1368     avprobe
1369 "
1370
1371 SUBSYSTEM_LIST="
1372     dct
1373     doc
1374     error_resilience
1375     faan
1376     fft
1377     lsp
1378     lzo
1379     mdct
1380     network
1381     rdft
1382 "
1383
1384 # COMPONENT_LIST needs to come last to ensure correct dependency checking
1385 CONFIG_LIST="
1386     $EXAMPLE_LIST
1387     $EXTERNAL_LIBRARY_LIST
1388     $HWACCEL_LIBRARY_LIST
1389     $FEATURE_LIST
1390     $LICENSE_LIST
1391     $LIBRARY_LIST
1392     $PROGRAM_LIST
1393     $SUBSYSTEM_LIST
1394     $SYSTEM_LIBRARY_LIST
1395     neon_clobber_test
1396     pic
1397     pod2man
1398     texi2html
1399     thumb
1400     valgrind_backtrace
1401     xmm_clobber_test
1402     $COMPONENT_LIST
1403 "
1404
1405 THREADS_LIST="
1406     pthreads
1407     w32threads
1408 "
1409
1410 ATOMICS_LIST="
1411     atomics_gcc
1412     atomics_suncc
1413     atomics_win32
1414 "
1415
1416 ARCH_LIST="
1417     aarch64
1418     alpha
1419     arm
1420     avr32
1421     avr32_ap
1422     avr32_uc
1423     bfin
1424     ia64
1425     m68k
1426     mips
1427     mips64
1428     parisc
1429     ppc
1430     ppc64
1431     s390
1432     sh4
1433     sparc
1434     sparc64
1435     tilegx
1436     tilepro
1437     tomi
1438     x86
1439     x86_32
1440     x86_64
1441 "
1442
1443 ARCH_EXT_LIST_ARM="
1444     armv5te
1445     armv6
1446     armv6t2
1447     armv8
1448     neon
1449     vfp
1450     vfpv3
1451 "
1452
1453 ARCH_EXT_LIST_X86_SIMD="
1454     amd3dnow
1455     amd3dnowext
1456     avx
1457     avx2
1458     fma3
1459     fma4
1460     mmx
1461     mmxext
1462     sse
1463     sse2
1464     sse3
1465     sse4
1466     sse42
1467     ssse3
1468     xop
1469 "
1470
1471 ARCH_EXT_LIST_PPC="
1472     altivec
1473     dcbzl
1474     ldbrx
1475     power8
1476     ppc4xx
1477     vsx
1478 "
1479
1480 ARCH_EXT_LIST_X86="
1481     $ARCH_EXT_LIST_X86_SIMD
1482     cpunop
1483     i686
1484 "
1485
1486 ARCH_EXT_LIST_MIPS="
1487     loongson
1488     mips32r1
1489     mips64r1
1490     mips32r2
1491     mips64r2
1492     mips32r6
1493     mips64r6
1494 "
1495
1496 ARCH_EXT_LIST="
1497     $ARCH_EXT_LIST_ARM
1498     $ARCH_EXT_LIST_MIPS
1499     $ARCH_EXT_LIST_PPC
1500     $ARCH_EXT_LIST_X86
1501     vis
1502 "
1503
1504 ARCH_FEATURES="
1505     aligned_stack
1506     fast_64bit
1507     fast_clz
1508     fast_cmov
1509     local_aligned_8
1510     local_aligned_16
1511     local_aligned_32
1512     simd_align_16
1513     simd_align_32
1514 "
1515
1516 BUILTIN_LIST="
1517     atomic_cas_ptr
1518     machine_rw_barrier
1519     MemoryBarrier
1520     mm_empty
1521     rdtsc
1522     sem_timedwait
1523     sync_val_compare_and_swap
1524 "
1525 HAVE_LIST_CMDLINE="
1526     inline_asm
1527     symver
1528     x86asm
1529 "
1530
1531 HAVE_LIST_PUB="
1532     bigendian
1533     fast_unaligned
1534 "
1535
1536 HEADERS_LIST="
1537     AVFoundation_AVFoundation_h
1538     arpa_inet_h
1539     cdio_paranoia_h
1540     cdio_paranoia_paranoia_h
1541     dispatch_dispatch_h
1542     dev_bktr_ioctl_bt848_h
1543     dev_bktr_ioctl_meteor_h
1544     dev_ic_bt8xx_h
1545     dev_video_bktr_ioctl_bt848_h
1546     dev_video_meteor_ioctl_meteor_h
1547     direct_h
1548     dxgidebug_h
1549     dxva_h
1550     io_h
1551     machine_ioctl_bt848_h
1552     machine_ioctl_meteor_h
1553     malloc_h
1554     poll_h
1555     sys_param_h
1556     sys_resource_h
1557     sys_select_h
1558     sys_soundcard_h
1559     sys_time_h
1560     sys_un_h
1561     sys_videoio_h
1562     unistd_h
1563     valgrind_valgrind_h
1564     windows_h
1565     winsock2_h
1566 "
1567
1568 INTRINSICS_LIST="
1569     intrinsics_neon
1570 "
1571
1572 MATH_FUNCS="
1573     atanf
1574     atan2f
1575     cbrtf
1576     cosf
1577     exp2
1578     exp2f
1579     expf
1580     isinf
1581     isnan
1582     ldexpf
1583     llrint
1584     llrintf
1585     log2
1586     log2f
1587     log10f
1588     lrint
1589     lrintf
1590     powf
1591     rint
1592     round
1593     roundf
1594     sinf
1595     trunc
1596     truncf
1597 "
1598
1599 SYSTEM_FEATURES="
1600     dos_paths
1601     libc_msvcrt
1602     MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
1603     section_data_rel_ro
1604     threads
1605     uwp
1606 "
1607
1608 SYSTEM_FUNCS="
1609     aligned_malloc
1610     clock_gettime
1611     closesocket
1612     CommandLineToArgvW
1613     fcntl
1614     getaddrinfo
1615     gethrtime
1616     getopt
1617     GetProcessAffinityMask
1618     GetProcessMemoryInfo
1619     GetProcessTimes
1620     getrusage
1621     GetSystemTimeAsFileTime
1622     gettimeofday
1623     gmtime_r
1624     inet_aton
1625     isatty
1626     localtime_r
1627     mach_absolute_time
1628     MapViewOfFile
1629     memalign
1630     mmap
1631     mprotect
1632     nanosleep
1633     posix_memalign
1634     sched_getaffinity
1635     SetConsoleTextAttribute
1636     setmode
1637     setrlimit
1638     Sleep
1639     strerror_r
1640     sysconf
1641     sysctl
1642     usleep
1643     VirtualAlloc
1644 "
1645
1646 SYSTEM_LIBRARIES="
1647     sdl
1648     vaapi_1
1649     vaapi_drm
1650     vaapi_x11
1651     vdpau_x11
1652     wincrypt
1653 "
1654
1655 TOOLCHAIN_FEATURES="
1656     as_arch_directive
1657     as_fpu_directive
1658     as_func
1659     as_object_arch
1660     asm_mod_q
1661     blocks_extension
1662     ebp_available
1663     ebx_available
1664     gnu_as
1665     ibm_asm
1666     inline_asm_labels
1667     pragma_deprecated
1668     symver_asm_label
1669     symver_gnu_asm
1670     vfp_args
1671     xform_asm
1672     xmm_clobbers
1673 "
1674
1675 TYPES_LIST="
1676     CONDITION_VARIABLE_Ptr
1677     CUVIDDECODECREATEINFO_bitDepthMinus8
1678     socklen_t
1679     struct_addrinfo
1680     struct_group_source_req
1681     struct_ip_mreq_source
1682     struct_ipv6_mreq
1683     struct_pollfd
1684     struct_rusage_ru_maxrss
1685     struct_sockaddr_in6
1686     struct_sockaddr_sa_len
1687     struct_sockaddr_storage
1688     struct_v4l2_frmivalenum_discrete
1689 "
1690
1691 HAVE_LIST="
1692     $ARCH_EXT_LIST
1693     $(add_suffix _external $ARCH_EXT_LIST)
1694     $(add_suffix _inline   $ARCH_EXT_LIST)
1695     $ARCH_FEATURES
1696     $BUILTIN_LIST
1697     $HAVE_LIST_CMDLINE
1698     $HAVE_LIST_PUB
1699     $HEADERS_LIST
1700     $INTRINSICS_LIST
1701     $MATH_FUNCS
1702     $SYSTEM_FEATURES
1703     $SYSTEM_FUNCS
1704     $SYSTEM_LIBRARIES
1705     $THREADS_LIST
1706     $TOOLCHAIN_FEATURES
1707     $TYPES_LIST
1708 "
1709
1710 # options emitted with CONFIG_ prefix but not available on the command line
1711 CONFIG_EXTRA="
1712     aandcttables
1713     ac3dsp
1714     adts_header
1715     audio_frame_queue
1716     audiodsp
1717     blockdsp
1718     bswapdsp
1719     cabac
1720     cbs
1721     cbs_h264
1722     cbs_h265
1723     cbs_mpeg2
1724     dirac_parse
1725     dvprofile
1726     faandct
1727     faanidct
1728     fdctdsp
1729     flacdsp
1730     fmtconvert
1731     g722dsp
1732     gmp
1733     golomb
1734     gplv3
1735     h263dsp
1736     h264chroma
1737     h264dsp
1738     h264parse
1739     h264pred
1740     h264qpel
1741     hevcparse
1742     hpeldsp
1743     huffman
1744     huffyuvdsp
1745     huffyuvencdsp
1746     idctdsp
1747     iirfilter
1748     imdct15
1749     intrax8
1750     iso_media
1751     ividsp
1752     jpegtables
1753     lgplv3
1754     libx262
1755     libxcb_shape
1756     lpc
1757     lzf
1758     me_cmp
1759     mpeg_er
1760     mpegaudio
1761     mpegaudiodsp
1762     mpegaudioheader
1763     mpegvideo
1764     mpegvideoenc
1765     mss34dsp
1766     pixblockdsp
1767     qpeldsp
1768     qsv
1769     qsvdec
1770     qsvenc
1771     qsvvpp
1772     rangecoder
1773     riffdec
1774     riffenc
1775     rtpdec
1776     rtpenc_chain
1777     rv34dsp
1778     sinewin
1779     snappy
1780     srtp
1781     startcode
1782     texturedsp
1783     texturedspenc
1784     tpeldsp
1785     vaapi_encode
1786     vc1dsp
1787     videodsp
1788     vp3dsp
1789     vp56dsp
1790     vp8dsp
1791     wma_freqs
1792     wmv2dsp
1793 "
1794
1795 CMDLINE_SELECT="
1796     $ARCH_EXT_LIST
1797     $CONFIG_LIST
1798     $HAVE_LIST_CMDLINE
1799     $THREADS_LIST
1800     asm
1801     cross_compile
1802     debug
1803     extra_warnings
1804     logging
1805     lto
1806     optimizations
1807     rpath
1808 "
1809
1810 PATHS_LIST="
1811     bindir
1812     datadir
1813     docdir
1814     incdir
1815     libdir
1816     mandir
1817     prefix
1818     shlibdir
1819 "
1820
1821 CMDLINE_SET="
1822     $PATHS_LIST
1823     ar
1824     arch
1825     as
1826     cc
1827     objcc
1828     cpu
1829     cross_prefix
1830     custom_allocator
1831     dep_cc
1832     env
1833     extra_version
1834     host_cc
1835     host_cflags
1836     host_extralibs
1837     host_ld
1838     host_ldflags
1839     host_os
1840     ignore_tests
1841     ld
1842     logfile
1843     malloc_prefix
1844     nm
1845     optflags
1846     pkg_config
1847     pkg_config_flags
1848     samples
1849     sysinclude
1850     sysroot
1851     target_exec
1852     target_os
1853     target_path
1854     target_samples
1855     toolchain
1856     x86asmexe
1857 "
1858
1859 CMDLINE_APPEND="
1860     extra_cflags
1861     extra_objcflags
1862     host_cppflags
1863 "
1864
1865 # code dependency declarations
1866
1867 # architecture extensions
1868
1869 armv5te_deps="arm"
1870 armv6_deps="arm"
1871 armv6t2_deps="arm"
1872 armv8_deps="aarch64"
1873 neon_deps_any="aarch64 arm"
1874 intrinsics_neon_deps="neon"
1875 vfp_deps_any="aarch64 arm"
1876 vfpv3_deps="vfp"
1877
1878 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1879
1880 altivec_deps="ppc"
1881 dcbzl_deps="ppc"
1882 ldbrx_deps="ppc"
1883 ppc4xx_deps="ppc"
1884 vsx_deps="altivec"
1885 power8_deps="vsx"
1886
1887 loongson_deps="mips"
1888 mips32r1_deps="mips32"
1889 mips32r2_deps="mips32"
1890 mips32r6_deps="mips32"
1891 mips64r1_deps="mips64"
1892 mips64r2_deps="mips64"
1893 mips64r6_deps="mips64"
1894
1895 vis_deps="sparc"
1896
1897 cpunop_deps="i686"
1898 x86_64_select="i686"
1899 x86_64_suggest="fast_cmov"
1900
1901 amd3dnow_deps="mmx"
1902 amd3dnowext_deps="amd3dnow"
1903 i686_deps="x86"
1904 mmx_deps="x86"
1905 mmxext_deps="mmx"
1906 sse_deps="mmxext"
1907 sse2_deps="sse"
1908 sse3_deps="sse2"
1909 ssse3_deps="sse3"
1910 sse4_deps="ssse3"
1911 sse42_deps="sse4"
1912 avx_deps="sse42"
1913 xop_deps="avx"
1914 fma3_deps="avx"
1915 fma4_deps="avx"
1916 avx2_deps="avx"
1917
1918 mmx_external_deps="x86asm"
1919 mmx_inline_deps="inline_asm x86"
1920 mmx_suggest="mmx_external mmx_inline"
1921
1922 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1923     eval dep=\$${ext}_deps
1924     eval ${ext}_external_deps='"${dep}_external"'
1925     eval ${ext}_inline_deps='"${dep}_inline"'
1926     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1927 done
1928
1929 aligned_stack_if_any="aarch64 ppc x86"
1930 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1931 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1932 fast_unaligned_if_any="aarch64 ppc x86"
1933 simd_align_16_if_any="altivec neon sse"
1934 simd_align_32_if_any="avx"
1935
1936 # system capabilities
1937 symver_if_any="symver_asm_label symver_gnu_asm"
1938 valgrind_backtrace_conflict="optimizations"
1939 valgrind_backtrace_deps="valgrind_valgrind_h"
1940
1941 # threading support
1942 atomics_gcc_if="sync_val_compare_and_swap"
1943 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1944 atomics_win32_if="MemoryBarrier"
1945 atomics_native_if_any="$ATOMICS_LIST"
1946 w32threads_deps="atomics_native"
1947 threads_if_any="$THREADS_LIST"
1948
1949 # subsystems
1950 cbs_h264_select="cbs golomb"
1951 cbs_h265_select="cbs golomb"
1952 cbs_mpeg2_select="cbs"
1953 dct_select="rdft"
1954 dirac_parse_select="golomb"
1955 error_resilience_select="me_cmp"
1956 faandct_deps="faan"
1957 faandct_select="fdctdsp"
1958 faanidct_deps="faan"
1959 faanidct_select="idctdsp"
1960 h264dsp_select="startcode"
1961 hevcparse_select="golomb"
1962 intrax8_select="blockdsp idctdsp"
1963 mdct_select="fft"
1964 rdft_select="fft"
1965 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1966 mpeg_er_select="error_resilience"
1967 mpegaudio_select="mpegaudiodsp mpegaudioheader"
1968 mpegaudiodsp_select="dct"
1969 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp mpeg_er videodsp"
1970 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1971 vc1dsp_select="h264chroma qpeldsp startcode"
1972
1973 # decoders / encoders
1974 aac_decoder_select="adts_header imdct15 mdct sinewin"
1975 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1976 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1977 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1978 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1979 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1980 adpcm_g722_decoder_select="g722dsp"
1981 adpcm_g722_encoder_select="g722dsp"
1982 aic_decoder_select="golomb idctdsp"
1983 alac_encoder_select="lpc"
1984 als_decoder_select="bswapdsp"
1985 amrnb_decoder_select="lsp"
1986 amrwb_decoder_select="lsp"
1987 amv_decoder_select="sp5x_decoder"
1988 ape_decoder_select="bswapdsp"
1989 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1990 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1991 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1992 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1993 atrac1_decoder_select="mdct sinewin"
1994 atrac3_decoder_select="mdct"
1995 atrac3p_decoder_select="mdct sinewin"
1996 bink_decoder_select="blockdsp hpeldsp"
1997 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1998 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1999 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
2000 clearvideo_decoder_select="idctdsp"
2001 cllc_decoder_select="bswapdsp"
2002 comfortnoise_encoder_select="lpc"
2003 cook_decoder_select="audiodsp mdct sinewin"
2004 cscd_decoder_select="lzo"
2005 cscd_decoder_suggest="zlib"
2006 dca_decoder_select="fmtconvert mdct"
2007 dds_decoder_select="texturedsp"
2008 dnxhd_decoder_select="blockdsp idctdsp"
2009 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
2010 dvvideo_decoder_select="dvprofile idctdsp"
2011 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
2012 dxa_decoder_deps="zlib"
2013 dxv_decoder_select="lzf texturedsp"
2014 eac3_decoder_select="ac3_decoder"
2015 eac3_encoder_select="ac3_encoder"
2016 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
2017 eatgq_decoder_select="aandcttables idctdsp"
2018 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
2019 exr_decoder_deps="zlib"
2020 ffv1_decoder_select="rangecoder"
2021 ffv1_encoder_select="rangecoder"
2022 ffvhuff_decoder_select="huffyuv_decoder"
2023 ffvhuff_encoder_select="huffyuv_encoder"
2024 fic_decoder_select="golomb"
2025 flac_decoder_select="flacdsp"
2026 flac_encoder_select="bswapdsp flacdsp lpc"
2027 flashsv_decoder_deps="zlib"
2028 flashsv_encoder_deps="zlib"
2029 flashsv2_decoder_deps="zlib"
2030 flv_decoder_select="h263_decoder"
2031 flv_encoder_select="h263_encoder"
2032 fourxm_decoder_select="blockdsp bswapdsp"
2033 fraps_decoder_select="bswapdsp huffman"
2034 g2m_decoder_deps="zlib"
2035 g2m_decoder_select="blockdsp idctdsp jpegtables"
2036 h261_decoder_select="mpeg_er mpegvideo"
2037 h261_encoder_select="aandcttables mpegvideoenc"
2038 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
2039 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
2040 h263i_decoder_select="h263_decoder"
2041 h263p_encoder_select="h263_encoder"
2042 h264_decoder_select="cabac golomb h264chroma h264dsp h264parse h264pred h264qpel videodsp"
2043 h264_decoder_suggest="error_resilience"
2044 hap_decoder_select="snappy texturedsp"
2045 hap_encoder_deps="libsnappy"
2046 hap_encoder_select="texturedspenc"
2047 hevc_decoder_select="bswapdsp cabac hevcparse videodsp"
2048 huffyuv_decoder_select="bswapdsp huffyuvdsp"
2049 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
2050 iac_decoder_select="imc_decoder"
2051 imc_decoder_select="bswapdsp fft mdct sinewin"
2052 indeo3_decoder_select="hpeldsp"
2053 indeo4_decoder_select="ividsp"
2054 indeo5_decoder_select="ividsp"
2055 interplay_video_decoder_select="hpeldsp"
2056 jpegls_decoder_select="mjpeg_decoder"
2057 jv_decoder_select="blockdsp"
2058 lagarith_decoder_select="huffyuvdsp"
2059 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
2060 magicyuv_decoder_select="huffyuvdsp"
2061 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2062 metasound_decoder_select="lsp mdct sinewin"
2063 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2064 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
2065 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
2066 mjpegb_decoder_select="mjpeg_decoder"
2067 mlp_decoder_select="mlp_parser"
2068 motionpixels_decoder_select="bswapdsp"
2069 mp1_decoder_select="mpegaudio"
2070 mp1float_decoder_select="mpegaudio"
2071 mp2_decoder_select="mpegaudio"
2072 mp2float_decoder_select="mpegaudio"
2073 mp3_decoder_select="mpegaudio"
2074 mp3adu_decoder_select="mpegaudio"
2075 mp3adufloat_decoder_select="mpegaudio"
2076 mp3float_decoder_select="mpegaudio"
2077 mp3on4_decoder_select="mpegaudio"
2078 mp3on4float_decoder_select="mpegaudio"
2079 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2080 mpc8_decoder_select="mpegaudiodsp"
2081 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2082 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2083 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2084 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2085 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2086 mpeg4_encoder_select="h263_encoder"
2087 msa1_decoder_select="mss34dsp"
2088 msmpeg4v1_decoder_select="h263_decoder"
2089 msmpeg4v2_decoder_select="h263_decoder"
2090 msmpeg4v2_encoder_select="h263_encoder"
2091 msmpeg4v3_decoder_select="h263_decoder"
2092 msmpeg4v3_encoder_select="h263_encoder"
2093 mss2_decoder_select="error_resilience mpeg_er mpegvideo qpeldsp vc1_decoder"
2094 mts2_decoder_select="mss34dsp"
2095 mxpeg_decoder_select="mjpeg_decoder"
2096 nellymoser_decoder_select="mdct sinewin"
2097 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2098 nuv_decoder_select="idctdsp lzo"
2099 on2avc_decoder_select="mdct"
2100 opus_decoder_deps="avresample"
2101 opus_decoder_select="imdct15"
2102 png_decoder_deps="zlib"
2103 png_encoder_deps="zlib"
2104 png_encoder_select="huffyuvencdsp"
2105 prores_decoder_select="idctdsp"
2106 prores_encoder_select="fdctdsp"
2107 qcelp_decoder_select="lsp"
2108 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2109 ra_144_encoder_select="audio_frame_queue lpc"
2110 ralf_decoder_select="golomb"
2111 rscc_decoder_deps="zlib"
2112 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2113 rv10_encoder_select="h263_encoder"
2114 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2115 rv20_encoder_select="h263_encoder"
2116 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2117 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2118 screenpresso_decoder_deps="zlib"
2119 sipr_decoder_select="lsp"
2120 sp5x_decoder_select="mjpeg_decoder"
2121 svq1_decoder_select="hpeldsp"
2122 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2123 svq3_decoder_select="golomb h264dsp h264parse h264pred hpeldsp tpeldsp videodsp"
2124 svq3_decoder_suggest="zlib"
2125 tak_decoder_select="audiodsp"
2126 tdsc_decoder_deps="zlib"
2127 tdsc_decoder_select="mjpeg_decoder"
2128 theora_decoder_select="vp3_decoder"
2129 thp_decoder_select="mjpeg_decoder"
2130 tiff_decoder_suggest="zlib"
2131 tiff_encoder_suggest="zlib"
2132 truehd_decoder_select="mlp_decoder"
2133 truemotion2_decoder_select="bswapdsp"
2134 truespeech_decoder_select="bswapdsp"
2135 tscc_decoder_deps="zlib"
2136 txd_decoder_select="texturedsp"
2137 twinvq_decoder_select="mdct lsp sinewin"
2138 utvideo_decoder_select="bswapdsp huffyuvdsp"
2139 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2140 vble_decoder_select="huffyuvdsp"
2141 vc1_decoder_select="blockdsp error_resilience h263_decoder h264qpel intrax8 mpeg_er mpegvideo vc1dsp"
2142 vc1image_decoder_select="vc1_decoder"
2143 vorbis_decoder_select="mdct"
2144 vorbis_encoder_select="mdct"
2145 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2146 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2147 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2148 vp6a_decoder_select="vp6_decoder"
2149 vp6f_decoder_select="vp6_decoder"
2150 vp7_decoder_select="h264pred videodsp vp8dsp"
2151 vp8_decoder_select="h264pred videodsp vp8dsp"
2152 vp9_decoder_select="videodsp vp9_superframe_split_bsf"
2153 webp_decoder_select="vp8_decoder"
2154 wmapro_decoder_select="mdct sinewin wma_freqs"
2155 wmav1_decoder_select="mdct sinewin wma_freqs"
2156 wmav1_encoder_select="mdct sinewin wma_freqs"
2157 wmav2_decoder_select="mdct sinewin wma_freqs"
2158 wmav2_encoder_select="mdct sinewin wma_freqs"
2159 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2160 wmv1_decoder_select="h263_decoder"
2161 wmv1_encoder_select="h263_encoder"
2162 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2163 wmv2_encoder_select="h263_encoder wmv2dsp"
2164 wmv3_decoder_select="vc1_decoder"
2165 wmv3image_decoder_select="wmv3_decoder"
2166 zerocodec_decoder_deps="zlib"
2167 zlib_decoder_deps="zlib"
2168 zlib_encoder_deps="zlib"
2169 zmbv_decoder_deps="zlib"
2170 zmbv_encoder_deps="zlib"
2171
2172 # hardware accelerators
2173 d3d11va_deps="dxva_h ID3D11VideoDecoder"
2174 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode ole32"
2175 vda_deps="VideoDecodeAcceleration_VDADecoder_h blocks_extension pthreads"
2176 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2177
2178 h263_vaapi_hwaccel_deps="vaapi"
2179 h263_vaapi_hwaccel_select="h263_decoder"
2180 h264_cuvid_hwaccel_deps="cuvid CUVIDH264PICPARAMS"
2181 h264_cuvid_hwaccel_select="h264_decoder"
2182 h264_d3d11va_hwaccel_deps="d3d11va"
2183 h264_d3d11va_hwaccel_select="h264_decoder"
2184 h264_d3d11va2_hwaccel_deps="d3d11va"
2185 h264_d3d11va2_hwaccel_select="h264_decoder"
2186 h264_dxva2_hwaccel_deps="dxva2"
2187 h264_dxva2_hwaccel_select="h264_decoder"
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_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferHEVC"
2205 hevc_vaapi_hwaccel_select="hevc_decoder"
2206 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2207 hevc_vdpau_hwaccel_select="hevc_decoder"
2208 mpeg1_vdpau_hwaccel_deps="vdpau"
2209 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2210 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2211 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2212 mpeg2_d3d11va2_hwaccel_deps="d3d11va"
2213 mpeg2_d3d11va2_hwaccel_select="mpeg2video_decoder"
2214 mpeg2_dxva2_hwaccel_deps="dxva2"
2215 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2216 mpeg2_vaapi_hwaccel_deps="vaapi"
2217 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2218 mpeg2_vdpau_hwaccel_deps="vdpau"
2219 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2220 mpeg4_vaapi_hwaccel_deps="vaapi"
2221 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2222 mpeg4_vdpau_hwaccel_deps="vdpau"
2223 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2224 vc1_d3d11va_hwaccel_deps="d3d11va"
2225 vc1_d3d11va_hwaccel_select="vc1_decoder"
2226 vc1_d3d11va2_hwaccel_deps="d3d11va"
2227 vc1_d3d11va2_hwaccel_select="vc1_decoder"
2228 vc1_dxva2_hwaccel_deps="dxva2"
2229 vc1_dxva2_hwaccel_select="vc1_decoder"
2230 vc1_vaapi_hwaccel_deps="vaapi"
2231 vc1_vaapi_hwaccel_select="vc1_decoder"
2232 vc1_vdpau_hwaccel_deps="vdpau"
2233 vc1_vdpau_hwaccel_select="vc1_decoder"
2234 vp8_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferVP8"
2235 vp8_vaapi_hwaccel_select="vp8_decoder"
2236 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2237 wmv3_d3d11va2_hwaccel_select="vc1_d3d11va2_hwaccel"
2238 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2239 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2240 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2241
2242 # hardware-accelerated codecs
2243 amf_deps_any="libdl LoadLibrary"
2244 nvenc_deps_any="libdl LoadLibrary"
2245 omx_deps="libdl pthreads"
2246 omx_rpi_select="omx"
2247 qsv_deps="libmfx"
2248 qsvdec_select="qsv"
2249 qsvenc_select="qsv"
2250 qsvvpp_select="qsv"
2251 vaapi_encode_deps="vaapi"
2252
2253 hwupload_cuda_filter_deps="cuda"
2254 scale_npp_filter_deps="cuda libnpp"
2255
2256 h264_amf_encoder_deps="amf"
2257 h264_mmal_decoder_deps="mmal"
2258 h264_nvenc_encoder_deps="nvenc"
2259 h264_omx_encoder_deps="omx"
2260 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec"
2261 h264_qsv_encoder_select="qsvenc"
2262 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
2263 h264_vaapi_encoder_select="cbs_h264 vaapi_encode"
2264 hevc_amf_encoder_deps="amf"
2265 hevc_nvenc_encoder_deps="nvenc"
2266 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser qsvdec"
2267 hevc_qsv_encoder_select="hevcparse qsvenc"
2268 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
2269 hevc_vaapi_encoder_select="cbs_h265 vaapi_encode"
2270 mjpeg_qsv_encoder_deps="libmfx"
2271 mjpeg_qsv_encoder_select="qsvenc"
2272 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
2273 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
2274 mpeg2_mmal_decoder_deps="mmal"
2275 mpeg2_qsv_decoder_select="qsvdec mpegvideo_parser"
2276 mpeg2_qsv_encoder_select="qsvenc"
2277 mpeg2_vaapi_encoder_deps="VAEncPictureParameterBufferMPEG2"
2278 mpeg2_vaapi_encoder_select="cbs_mpeg2 vaapi_encode"
2279 mpeg4_omx_encoder_deps="omx"
2280 vc1_mmal_decoder_deps="mmal"
2281 vc1_qsv_decoder_select="qsvdec vc1_parser"
2282 vp8_qsv_decoder_select="qsvdec vp8_parser"
2283 vp8_vaapi_encoder_deps="VAEncPictureParameterBufferVP8"
2284 vp8_vaapi_encoder_select="vaapi_encode"
2285 vp9_vaapi_encoder_deps="VAEncPictureParameterBufferVP9"
2286 vp9_vaapi_encoder_select="vaapi_encode"
2287
2288 nvenc_h264_encoder_select="h264_nvenc_encoder"
2289 nvenc_hevc_encoder_select="hevc_nvenc_encoder"
2290
2291 # parsers
2292 aac_parser_select="adts_header"
2293 h264_parser_select="golomb h264dsp h264parse"
2294 hevc_parser_select="hevcparse"
2295 mpegaudio_parser_select="mpegaudioheader"
2296 mpegvideo_parser_select="mpegvideo"
2297 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2298 vc1_parser_select="vc1dsp"
2299
2300 # bitstream_filters
2301 aac_adtstoasc_bsf_select="adts_header"
2302 h264_metadata_bsf_select="cbs_h264"
2303 h264_redundant_pps_bsf_select="cbs_h264"
2304 hevc_metadata_bsf_select="cbs_h265"
2305 mjpeg2jpeg_bsf_select="jpegtables"
2306 mpeg2_metadata_bsf_select="cbs_mpeg2"
2307 trace_headers_bsf_select="cbs_h264 cbs_h265 cbs_mpeg2"
2308
2309 # external libraries
2310 avisynth_deps="LoadLibrary"
2311 avxsynth_deps="libdl"
2312 avisynth_demuxer_deps_any="avisynth avxsynth"
2313 avisynth_demuxer_select="riffdec"
2314 libdcadec_decoder_deps="libdcadec"
2315 libfaac_encoder_deps="libfaac"
2316 libfaac_encoder_select="audio_frame_queue"
2317 libfdk_aac_decoder_deps="libfdk_aac"
2318 libfdk_aac_encoder_deps="libfdk_aac"
2319 libfdk_aac_encoder_select="audio_frame_queue"
2320 libgsm_decoder_deps="libgsm"
2321 libgsm_encoder_deps="libgsm"
2322 libgsm_ms_decoder_deps="libgsm"
2323 libgsm_ms_encoder_deps="libgsm"
2324 libilbc_decoder_deps="libilbc"
2325 libilbc_encoder_deps="libilbc"
2326 libkvazaar_encoder_deps="libkvazaar"
2327 libmp3lame_encoder_deps="libmp3lame"
2328 libmp3lame_encoder_select="audio_frame_queue mpegaudioheader"
2329 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2330 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2331 libopencore_amrnb_encoder_select="audio_frame_queue"
2332 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2333 libopenh264_decoder_deps="libopenh264"
2334 libopenh264_decoder_select="h264_mp4toannexb_bsf"
2335 libopenh264_encoder_deps="libopenh264"
2336 libopenjpeg_decoder_deps="libopenjpeg"
2337 libopenjpeg_encoder_deps="libopenjpeg"
2338 libopus_decoder_deps="libopus"
2339 libopus_encoder_deps="libopus"
2340 libopus_encoder_select="audio_frame_queue"
2341 libschroedinger_decoder_deps="libschroedinger"
2342 libschroedinger_encoder_deps="libschroedinger"
2343 libspeex_decoder_deps="libspeex"
2344 libspeex_encoder_deps="libspeex"
2345 libspeex_encoder_select="audio_frame_queue"
2346 libtheora_encoder_deps="libtheora"
2347 libtwolame_encoder_deps="libtwolame"
2348 libvo_aacenc_encoder_deps="libvo_aacenc"
2349 libvo_aacenc_encoder_select="audio_frame_queue"
2350 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2351 libvorbis_encoder_deps="libvorbis"
2352 libvorbis_encoder_select="audio_frame_queue"
2353 libvpx_vp8_decoder_deps="libvpx"
2354 libvpx_vp8_encoder_deps="libvpx"
2355 libvpx_vp9_decoder_deps="libvpx"
2356 libvpx_vp9_encoder_deps="libvpx"
2357 libwavpack_encoder_deps="libwavpack"
2358 libwavpack_encoder_select="audio_frame_queue"
2359 libwebp_encoder_deps="libwebp"
2360 libx262_encoder_deps="libx262"
2361 libx264_encoder_deps="libx264"
2362 libx265_encoder_deps="libx265"
2363 libxavs_encoder_deps="libxavs"
2364 libxvid_encoder_deps="libxvid mkstemp"
2365
2366 # demuxers / muxers
2367 ac3_demuxer_select="ac3_parser"
2368 asf_demuxer_select="riffdec"
2369 asf_muxer_select="riffenc"
2370 asf_stream_muxer_select="asf_muxer"
2371 avi_demuxer_select="iso_media riffdec"
2372 avi_muxer_select="riffenc"
2373 caf_demuxer_select="iso_media riffdec"
2374 dash_muxer_select="mp4_muxer"
2375 dirac_demuxer_select="dirac_parser"
2376 dv_demuxer_select="dvprofile"
2377 dv_muxer_select="dvprofile"
2378 dxa_demuxer_select="riffdec"
2379 eac3_demuxer_select="ac3_parser"
2380 f4v_muxer_select="mov_muxer"
2381 flac_demuxer_select="flac_parser"
2382 hds_muxer_select="flv_muxer"
2383 hls_muxer_select="mpegts_muxer"
2384 ipod_muxer_select="mov_muxer"
2385 ismv_muxer_select="mov_muxer"
2386 matroska_audio_muxer_select="matroska_muxer"
2387 matroska_demuxer_select="iso_media riffdec"
2388 matroska_demuxer_suggest="bzlib lzo zlib"
2389 matroska_muxer_select="iso_media riffenc"
2390 mmf_muxer_select="riffenc"
2391 mov_demuxer_select="iso_media riffdec"
2392 mov_demuxer_suggest="zlib"
2393 mov_muxer_select="iso_media riffenc rtpenc_chain"
2394 mp3_demuxer_select="mpegaudio_parser"
2395 mp3_muxer_select="mpegaudioheader"
2396 mp4_muxer_select="mov_muxer"
2397 mpegts_demuxer_select="iso_media"
2398 mpegts_muxer_select="adts_muxer latm_muxer"
2399 mpegtsraw_demuxer_select="mpegts_demuxer"
2400 mxf_d10_muxer_select="mxf_muxer"
2401 nut_muxer_select="riffenc"
2402 nuv_demuxer_select="riffdec"
2403 oga_muxer_select="ogg_muxer"
2404 ogg_demuxer_select="dirac_parse"
2405 opus_muxer_select="ogg_muxer"
2406 psp_muxer_select="mov_muxer"
2407 rtp_demuxer_select="sdp_demuxer"
2408 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2409 rtsp_demuxer_select="http_protocol rtpdec"
2410 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2411 sap_demuxer_select="sdp_demuxer"
2412 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2413 sdp_demuxer_select="rtpdec"
2414 smoothstreaming_muxer_select="ismv_muxer"
2415 spdif_demuxer_select="adts_header"
2416 spdif_muxer_select="adts_header"
2417 spx_muxer_select="ogg_muxer"
2418 swf_demuxer_suggest="zlib"
2419 tak_demuxer_select="tak_parser"
2420 tg2_muxer_select="mov_muxer"
2421 tgp_muxer_select="mov_muxer"
2422 w64_demuxer_select="wav_demuxer"
2423 wav_demuxer_select="riffdec"
2424 wav_muxer_select="riffenc"
2425 webm_muxer_select="iso_media riffenc"
2426 wtv_demuxer_select="mpegts_demuxer riffdec"
2427 xmv_demuxer_select="riffdec"
2428 xwma_demuxer_select="riffdec"
2429
2430 # indevs
2431 alsa_indev_deps="alsa"
2432 avfoundation_indev_deps="AVFoundation_AVFoundation_h objc_arc pthreads"
2433 avfoundation_indev_extralibs="-framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia"
2434 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2435 fbdev_indev_deps="linux_fb_h"
2436 jack_indev_deps="libjack"
2437 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
2438 libcdio_indev_deps="libcdio"
2439 libdc1394_indev_deps="libdc1394"
2440 oss_indev_deps_any="sys_soundcard_h"
2441 pulse_indev_deps="libpulse"
2442 sndio_indev_deps="sndio"
2443 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2444 vfwcap_indev_deps="vfw32 vfwcap_defines"
2445 xcbgrab_indev_deps="libxcb libxcb_shape"
2446 xcbgrab_indev_suggest="libxcb_shm libxcb_xfixes"
2447
2448 # protocols
2449 ffrtmpcrypt_protocol_conflict="librtmp_protocol"
2450 ffrtmpcrypt_protocol_deps_any="gmp openssl"
2451 ffrtmpcrypt_protocol_select="tcp_protocol"
2452 ffrtmphttp_protocol_conflict="librtmp_protocol"
2453 ffrtmphttp_protocol_select="http_protocol"
2454 gopher_protocol_select="network"
2455 http_protocol_select="tcp_protocol"
2456 http_protocol_suggest="zlib"
2457 httpproxy_protocol_select="tcp_protocol"
2458 httpproxy_protocol_suggest="zlib"
2459 https_protocol_select="tls_protocol"
2460 https_protocol_suggest="zlib"
2461 icecast_protocol_select="http_protocol"
2462 librtmp_protocol_deps="librtmp"
2463 librtmpe_protocol_deps="librtmp"
2464 librtmps_protocol_deps="librtmp"
2465 librtmpt_protocol_deps="librtmp"
2466 librtmpte_protocol_deps="librtmp"
2467 mmsh_protocol_select="http_protocol"
2468 mmst_protocol_select="network"
2469 rtmp_protocol_conflict="librtmp_protocol"
2470 rtmp_protocol_select="tcp_protocol"
2471 rtmp_protocol_suggest="zlib"
2472 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2473 rtmpe_protocol_suggest="zlib"
2474 rtmps_protocol_conflict="librtmp_protocol"
2475 rtmps_protocol_select="tls_protocol"
2476 rtmps_protocol_suggest="zlib"
2477 rtmpt_protocol_select="ffrtmphttp_protocol"
2478 rtmpt_protocol_suggest="zlib"
2479 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2480 rtmpte_protocol_suggest="zlib"
2481 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2482 rtmpts_protocol_suggest="zlib"
2483 rtp_protocol_select="udp_protocol"
2484 sctp_protocol_deps="struct_sctp_event_subscribe"
2485 sctp_protocol_select="network"
2486 srtp_protocol_select="rtp_protocol srtp"
2487 tcp_protocol_select="network"
2488 tls_protocol_deps_any="gnutls openssl"
2489 tls_protocol_select="tcp_protocol"
2490 udp_protocol_select="network"
2491 unix_protocol_deps="sys_un_h"
2492 unix_protocol_select="network"
2493
2494 # filters
2495 asyncts_filter_deps="avresample"
2496 blackframe_filter_deps="gpl"
2497 boxblur_filter_deps="gpl"
2498 bs2b_filter_deps="libbs2b"
2499 cropdetect_filter_deps="gpl"
2500 deinterlace_qsv_filter_deps="libmfx"
2501 deinterlace_vaapi_filter_deps="vaapi"
2502 delogo_filter_deps="gpl"
2503 drawtext_filter_deps="libfreetype"
2504 drawtext_filter_suggest="libfontconfig"
2505 frei0r_filter_deps="frei0r libdl"
2506 frei0r_src_filter_deps="frei0r libdl"
2507 hdcd_filter_deps="libhdcd"
2508 hqdn3d_filter_deps="gpl"
2509 interlace_filter_deps="gpl"
2510 movie_filter_deps="avcodec avformat"
2511 ocv_filter_deps="libopencv"
2512 overlay_qsv_filter_deps="libmfx"
2513 overlay_qsv_filter_select="qsvvpp"
2514 resample_filter_deps="avresample"
2515 scale_filter_deps="swscale"
2516 scale_qsv_filter_deps="libmfx"
2517 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2518 vpp_qsv_filter_deps="libmfx"
2519 vpp_qsv_filter_select="qsvvpp"
2520
2521 # examples
2522 decode_audio_example_deps="avcodec avutil"
2523 decode_video_example_deps="avcodec avutil"
2524 encode_audio_example_deps="avcodec avutil"
2525 encode_video_example_deps="avcodec avutil"
2526 filter_audio_example_deps="avfilter avutil"
2527 metadata_example_deps="avformat avutil"
2528 output_example_deps="avcodec avformat avresample avutil swscale"
2529 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder"
2530 transcode_aac_example_deps="avcodec avformat avresample"
2531
2532 # EXTRALIBS_LIST
2533 cpu_init_extralibs="pthreads_extralibs"
2534 cws2fws_extralibs="zlib_extralibs"
2535
2536 # libraries, in linking order
2537 avcodec_deps="avutil"
2538 avcodec_select="null_bsf"
2539 avdevice_deps="avformat avcodec avutil"
2540 avfilter_deps="avutil"
2541 avformat_deps="avcodec avutil"
2542 avformat_suggest="network"
2543 avresample_deps="avutil"
2544 swscale_deps="avutil"
2545
2546 avcodec_extralibs="pthreads_extralibs libm_extralibs"
2547 avdevice_extralibs="libm_extralibs"
2548 avformat_extralibs="libm_extralibs"
2549 avfilter_extralibs="pthreads_extralibs libm_extralibs"
2550 avresample_extralibs="libm_extralibs"
2551 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"
2552 swscale_extralibs="libm_extralibs"
2553
2554 # programs
2555 avconv_deps="avcodec avfilter avformat avresample swscale"
2556 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2557                fps_filter null_filter resample_filter scale_filter
2558                trim_filter"
2559 avconv_suggest="psapi shell32"
2560 avplay_deps="avcodec avfilter avformat avresample sdl"
2561 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2562 avplay_suggest="shell32"
2563 avprobe_deps="avcodec avformat"
2564 avprobe_suggest="shell32"
2565
2566 # documentation
2567 pod2man_deps="doc"
2568 texi2html_deps="doc"
2569
2570 # default parameters
2571
2572 logfile="avbuild/config.log"
2573
2574 # installation paths
2575 prefix_default="/usr/local"
2576 bindir_default='${prefix}/bin'
2577 datadir_default='${prefix}/share/avconv'
2578 docdir_default='${prefix}/share/doc/libav'
2579 incdir_default='${prefix}/include'
2580 libdir_default='${prefix}/lib'
2581 mandir_default='${prefix}/share/man'
2582 shlibdir_default="$libdir_default"
2583
2584 # toolchain
2585 ar_default="ar"
2586 cc_default="gcc"
2587 host_cc_default="gcc"
2588 x86asmexe_default="nasm"
2589 ln_s="ln -s -f"
2590 nm_default="nm -g"
2591 pkg_config_default=pkg-config
2592 ranlib="ranlib"
2593 strip="strip"
2594 version_script='--version-script'
2595 objformat="elf32"
2596
2597 # machine
2598 arch_default=$(uname -m)
2599 cpu="generic"
2600 intrinsics="none"
2601
2602 # OS
2603 target_os_default=$(tolower $(uname -s))
2604 host_os=$target_os_default
2605
2606 # configurable options
2607 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2608
2609 enable asm
2610 enable debug
2611 enable doc
2612 enable faan faandct faanidct
2613 enable optimizations
2614 enable safe_bitstream_reader
2615 enable static
2616 enable swscale_alpha
2617 enable valgrind_backtrace
2618
2619 # By default, enable only those hwaccels that have no external dependencies.
2620 enable d3d11va dxva2 vda vdpau
2621
2622 # internal components are enabled by default
2623 enable $EXTRALIBS_LIST
2624
2625 # Avoid external, non-system, libraries getting enabled by dependency resolution
2626 disable $EXTERNAL_LIBRARY_LIST
2627
2628 # build settings
2629 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2630 LIBPREF="lib"
2631 LIBSUF=".a"
2632 LIBNAME='$(LIBPREF)$(NAME)$(LIBSUF)'
2633 SLIBPREF="lib"
2634 SLIBSUF=".so"
2635 SLIBNAME='$(SLIBPREF)$(NAME)$(SLIBSUF)'
2636 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2637 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2638 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2639 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2640 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2641 VERSION_SCRIPT_POSTPROCESS_CMD="cat"
2642
2643 asflags_filter=echo
2644 cflags_filter=echo
2645 ldflags_filter=echo
2646
2647 AS_C='-c'
2648 AS_O='-o $@'
2649 CC_C='-c'
2650 CC_E='-E -o $@'
2651 CC_O='-o $@'
2652 OBJCC_C='-c'
2653 OBJCC_E='-E -o $@'
2654 OBJCC_O='-o $@'
2655 X86ASM_O='-o $@'
2656 LD_O='-o $@'
2657 LD_LIB='-l%'
2658 LD_PATH='-L'
2659 HOSTCC_C='-c'
2660 HOSTCC_E='-E -o $@'
2661 HOSTCC_O='-o $@'
2662 HOSTLD_O='-o $@'
2663
2664 host_extralibs='-lm'
2665 host_cflags_filter=echo
2666 host_ldflags_filter=echo
2667
2668 target_path='$(CURDIR)'
2669
2670 # since the object filename is not given with the -MM flag, the compiler
2671 # is only able to print the basename, and we must add the path ourselves
2672 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2673 DEPFLAGS='-MM'
2674
2675 mkdir -p avbuild
2676
2677 # find source path
2678 if test -f configure; then
2679     source_path=.
2680 else
2681     source_path=$(cd $(dirname "$0"); pwd)
2682     echo "$source_path" | grep -q '[[:blank:]]' &&
2683         die "Out of tree builds are impossible with whitespace in source path."
2684     test -e "$source_path/config.h" &&
2685         die "Out of tree builds are impossible with config.h in source dir."
2686 fi
2687
2688 for v in "$@"; do
2689     r=${v#*=}
2690     l=${v%"$r"}
2691     r=$(sh_quote "$r")
2692     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2693 done
2694
2695 find_things(){
2696     thing=$1
2697     pattern=$2
2698     file=$source_path/$3
2699     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2700 }
2701
2702 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2703 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2704 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2705 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2706 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2707 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2708 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2709
2710 find_things_extern(){
2711     thing=$1
2712     pattern=$2
2713     file=$source_path/$3
2714     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2715 }
2716
2717 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2718 HWACCEL_LIST=$(find_things_extern hwaccel AVHWAccel libavcodec/hwaccels.h)
2719 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2720
2721 AVCODEC_COMPONENTS_LIST="
2722     $BSF_LIST
2723     $DECODER_LIST
2724     $ENCODER_LIST
2725     $HWACCEL_LIST
2726     $PARSER_LIST
2727 "
2728
2729 AVDEVICE_COMPONENTS_LIST="
2730     $INDEV_LIST
2731 "
2732
2733 AVFILTER_COMPONENTS_LIST="
2734     $FILTER_LIST
2735 "
2736
2737 AVFORMAT_COMPONENTS_LIST="
2738     $DEMUXER_LIST
2739     $MUXER_LIST
2740     $PROTOCOL_LIST
2741 "
2742
2743 ALL_COMPONENTS="
2744     $AVCODEC_COMPONENTS_LIST
2745     $AVDEVICE_COMPONENTS_LIST
2746     $AVFILTER_COMPONENTS_LIST
2747     $AVFORMAT_COMPONENTS_LIST
2748 "
2749
2750 for n in $COMPONENT_LIST; do
2751     v=$(toupper ${n%s})_LIST
2752     eval enable \$$v
2753     eval ${n}_if_any="\$$v"
2754 done
2755
2756 enable $ARCH_EXT_LIST
2757
2758 die_unknown(){
2759     echo "Unknown option \"$1\"."
2760     echo "See $0 --help for available options."
2761     exit 1
2762 }
2763
2764 print_3_columns() {
2765     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2766 }
2767
2768 show_list() {
2769     suffix=_$1
2770     shift
2771     echo $* | sed s/$suffix//g | print_3_columns
2772     exit 0
2773 }
2774
2775 for opt do
2776     optval="${opt#*=}"
2777     case "$opt" in
2778         --extra-ldflags=*)
2779             add_ldflags $optval
2780         ;;
2781         --extra-ldexeflags=*)
2782             add_ldexeflags $optval
2783         ;;
2784         --extra-ldsoflags=*)
2785             add_ldsoflags $optval
2786         ;;
2787         --extra-libs=*)
2788             add_extralibs $optval
2789         ;;
2790         --disable-devices)
2791             disable $INDEV_LIST
2792         ;;
2793         --enable-debug=*)
2794             debuglevel="$optval"
2795         ;;
2796         --disable-programs)
2797             disable $PROGRAM_LIST
2798         ;;
2799         --disable-everything)
2800             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2801         ;;
2802         --disable-all)
2803             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2804             disable $LIBRARY_LIST $PROGRAM_LIST doc
2805         ;;
2806         --enable-*=*|--disable-*=*)
2807             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2808             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2809             eval list=\$$(toupper $thing)_LIST
2810             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2811             $action $(filter "$name" $list)
2812         ;;
2813         --enable-yasm|--disable-yasm)
2814             warn "The ${opt} option is only provided for compatibility and will be\n"\
2815                  "removed in the future. Use --enable-x86asm / --disable-x86asm instead."
2816             test $opt = --enable-yasm && x86asm=yes || x86asm=no
2817         ;;
2818         --enable-?*|--disable-?*)
2819             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2820             if is_in $option $COMPONENT_LIST; then
2821                 test $action = disable && action=unset
2822                 eval $action \$$(toupper ${option%s})_LIST
2823             elif is_in $option $CMDLINE_SELECT; then
2824                 $action $option
2825             else
2826                 die_unknown $opt
2827             fi
2828         ;;
2829         --list-*)
2830             NAME="${opt#--list-}"
2831             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2832             NAME=${NAME%s}
2833             eval show_list $NAME \$$(toupper $NAME)_LIST
2834         ;;
2835         --help|-h) show_help
2836         ;;
2837         --quiet|-q) quiet=yes
2838         ;;
2839         *)
2840             optname="${opt%%=*}"
2841             optname="${optname#--}"
2842             optname=$(echo "$optname" | sed 's/-/_/g')
2843             if is_in $optname $CMDLINE_SET; then
2844                 eval $optname='$optval'
2845             elif is_in $optname $CMDLINE_APPEND; then
2846                 append $optname "$optval"
2847             else
2848                 die_unknown $opt
2849             fi
2850         ;;
2851     esac
2852 done
2853
2854 for e in $env; do
2855     eval "export $e"
2856 done
2857
2858 disabled logging && logfile=/dev/null
2859
2860 # command line configuration sanity checks
2861
2862 # we need to build at least one lib type
2863 if ! enabled_any static shared; then
2864     cat <<EOF
2865 At least one library type must be built.
2866 Specify --enable-static to build the static libraries or --enable-shared to
2867 build the shared libraries as well. To only build the shared libraries specify
2868 --disable-static in addition to --enable-shared.
2869 EOF
2870     exit 1
2871 fi
2872
2873 # Die early if licensing-related configure options are incompatible.
2874 die_license_disabled() {
2875     enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
2876 }
2877
2878 map "die_license_disabled gpl"      $EXTERNAL_LIBRARY_GPL_LIST
2879 map "die_license_disabled nonfree"  $EXTERNAL_LIBRARY_NONFREE_LIST $HWACCEL_LIBRARY_NONFREE_LIST
2880 map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST
2881
2882 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
2883
2884 if enabled nonfree; then
2885     license="nonfree and unredistributable"
2886 elif enabled gplv3; then
2887     license="GPL version 3 or later"
2888 elif enabled lgplv3; then
2889     license="LGPL version 3 or later"
2890 elif enabled gpl; then
2891     license="GPL version 2 or later"
2892 else
2893     license="LGPL version 2.1 or later"
2894 fi
2895
2896 enabled_all gnutls openssl &&
2897     die "GnuTLS and OpenSSL must not be enabled at the same time."
2898
2899 # Disable all the library-specific components if the library itself
2900 # is disabled, see AVCODEC_LIST and following _LIST variables.
2901
2902 disable_components(){
2903     disabled ${1} && disable $(
2904         eval components="\$$(toupper ${1})_COMPONENTS"
2905         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2906     )
2907 }
2908
2909 map 'disable_components $v' $LIBRARY_LIST
2910
2911 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2912 set >> $logfile
2913
2914 case "$toolchain" in
2915     *-asan)
2916         cc_default="${toolchain%-asan}"
2917         add_cflags  -fsanitize=address
2918         add_ldflags -fsanitize=address
2919     ;;
2920     *-msan)
2921         cc_default="${toolchain%-msan}"
2922         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2923         add_ldflags -fsanitize=memory
2924     ;;
2925     *-tsan)
2926         cc_default="${toolchain%-tsan}"
2927         add_cflags  -fsanitize=thread -fPIE
2928         add_ldflags -fsanitize=thread -pie
2929         case "$toolchain" in
2930             gcc-tsan)
2931                 add_cflags  -fPIC
2932                 add_ldflags -fPIC
2933                 ;;
2934         esac
2935     ;;
2936     *-usan)
2937         cc_default="${toolchain%-usan}"
2938         add_cflags  -fsanitize=undefined
2939         add_ldflags -fsanitize=undefined
2940         case "$toolchain" in
2941             clang-usan)
2942                 add_cflags -O1
2943                 ;;
2944         esac
2945     ;;
2946     valgrind-*)
2947         target_exec_default="valgrind"
2948         case "$toolchain" in
2949             valgrind-massif)
2950                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2951                 ;;
2952             valgrind-memcheck)
2953                 target_exec_args="--track-origins=yes --leak-check=full"
2954                 ;;
2955         esac
2956     ;;
2957     msvc)
2958         # Check whether the current MSVC version needs the C99 converter.
2959         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2960         # support enough of C99 to build libav. Default to the new
2961         # behaviour if the regexp was unable to match anything, since this
2962         # successfully parses the version number of existing supported
2963         # versions that require the converter (MSVC 2010 and 2012).
2964         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2965         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2966             cc_default="cl"
2967         else
2968             cc_default="c99wrap cl"
2969         fi
2970         ld_default="$source_path/compat/windows/mslink"
2971         nm_default="dumpbin -symbols"
2972         ar_default="lib"
2973         case "$arch" in
2974         aarch64|arm64)
2975             as_default="armasm64"
2976             ;;
2977         arm*)
2978             as_default="armasm"
2979             ;;
2980         esac
2981         target_os_default="win32"
2982         # Use a relative path for TMPDIR. This makes sure all the
2983         # ffconf temp files are written with a relative path, avoiding
2984         # issues with msys/win32 path conversion for MSVC parameters
2985         # such as -Fo<file> or -out:<file>.
2986         TMPDIR=.
2987     ;;
2988     icl)
2989         cc_default="icl"
2990         ld_default="xilink"
2991         nm_default="dumpbin -symbols"
2992         ar_default="xilib"
2993         target_os_default="win32"
2994         TMPDIR=.
2995     ;;
2996     gcov)
2997         add_cflags  -fprofile-arcs -ftest-coverage
2998         add_ldflags -fprofile-arcs -ftest-coverage
2999     ;;
3000     llvm-cov)
3001         add_cflags -fprofile-arcs -ftest-coverage
3002         add_ldflags --coverage
3003     ;;
3004     hardened)
3005         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
3006         add_cflags   -fno-strict-overflow -fstack-protector-all
3007         add_ldflags  -Wl,-z,relro -Wl,-z,now
3008     ;;
3009     ?*)
3010         die "Unknown toolchain $toolchain"
3011     ;;
3012 esac
3013
3014 if test -n "$cross_prefix"; then
3015     test -n "$arch" && test -n "$target_os" ||
3016         die "Must specify target arch (--arch) and OS (--target-os) when cross-compiling"
3017     enable cross_compile
3018 fi
3019
3020 ar_default="${cross_prefix}${ar_default}"
3021 cc_default="${cross_prefix}${cc_default}"
3022 objcc_default="${cross_prefix}${objcc_default}"
3023 x86asmexe_default="${cross_prefix}${x86asmexe_default}"
3024 nm_default="${cross_prefix}${nm_default}"
3025 pkg_config_default="${cross_prefix}${pkg_config_default}"
3026 ranlib="${cross_prefix}${ranlib}"
3027 strip="${cross_prefix}${strip}"
3028
3029 sysinclude_default="${sysroot}/usr/include"
3030
3031 set_default arch cc pkg_config sysinclude target_exec target_os x86asmexe
3032 enabled cross_compile || host_cc_default=$cc
3033 set_default host_cc
3034
3035 if ! $pkg_config --version >/dev/null 2>&1; then
3036     warn "$pkg_config not found, library detection may fail."
3037     pkg_config=false
3038 fi
3039
3040 exesuf() {
3041     case $1 in
3042         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
3043     esac
3044 }
3045
3046 EXESUF=$(exesuf $target_os)
3047 HOSTEXESUF=$(exesuf $host_os)
3048
3049 # set temporary file name
3050 : ${TMPDIR:=$TEMPDIR}
3051 : ${TMPDIR:=$TMP}
3052 : ${TMPDIR:=/tmp}
3053
3054 if ! check_cmd mktemp -u XXXXXX; then
3055     # simple replacement for missing mktemp
3056     # NOT SAFE FOR GENERAL USE
3057     mktemp(){
3058         tmpname="${2%%XXX*}.${HOSTNAME}.${UID}.$$"
3059         echo "$tmpname"
3060         mkdir "$tmpname"
3061     }
3062 fi
3063
3064 AVTMPDIR=$(mktemp -d "${TMPDIR}/avconf.XXXXXXXX" 2> /dev/null) ||
3065     die "Unable to create temporary directory in $TMPDIR."
3066
3067 tmpfile(){
3068     tmp="${AVTMPDIR}/test"$2
3069     (set -C; exec > $tmp) 2> /dev/null ||
3070         die "Unable to create temporary file in $AVTMPDIR."
3071     eval $1=$tmp
3072 }
3073
3074 trap 'rm -rf -- "$AVTMPDIR"' EXIT
3075 trap 'exit 2' INT
3076
3077 tmpfile TMPASM .asm
3078 tmpfile TMPC   .c
3079 tmpfile TMPE   $EXESUF
3080 tmpfile TMPH   .h
3081 tmpfile TMPO   .o
3082 tmpfile TMPS   .S
3083 tmpfile TMPSH  .sh
3084 tmpfile TMPV   .ver
3085
3086 unset -f mktemp
3087
3088 chmod +x $TMPE
3089
3090 # make sure we can execute files in $TMPDIR
3091 cat > $TMPSH 2>> $logfile <<EOF
3092 #! /bin/sh
3093 EOF
3094 chmod +x $TMPSH >> $logfile 2>&1
3095 if ! $TMPSH >> $logfile 2>&1; then
3096     cat <<EOF
3097 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
3098 variable to another directory and make sure that it is not mounted noexec.
3099 EOF
3100     die "Sanity test failed."
3101 fi
3102
3103 armasm_flags(){
3104     for flag; do
3105         case $flag in
3106             # Filter out MSVC cl.exe options from cflags that shouldn't
3107             # be passed to gas-preprocessor
3108             -M[TD]*)                                            ;;
3109             *)                  echo $flag                      ;;
3110         esac
3111    done
3112 }
3113
3114 cparser_flags(){
3115     for flag; do
3116         case $flag in
3117             -Wno-switch)             echo -Wno-switch-enum ;;
3118             -Wno-format-zero-length) ;;
3119             -Wdisabled-optimization) ;;
3120             -Wno-pointer-sign)       echo -Wno-other ;;
3121             *)                       echo $flag ;;
3122         esac
3123     done
3124 }
3125
3126 msvc_common_flags(){
3127     for flag; do
3128         case $flag in
3129             # In addition to specifying certain flags under the compiler
3130             # specific filters, they must be specified here as well or else the
3131             # generic catch all at the bottom will print the original flag.
3132             -Wall)                ;;
3133             -Wextra)              ;;
3134             -std=c99)             ;;
3135             # Common flags
3136             -fomit-frame-pointer) ;;
3137             -g)                   echo -Z7 ;;
3138             -fno-math-errno)      ;;
3139             -fno-common)          ;;
3140             -fno-signed-zeros)    ;;
3141             -fPIC)                ;;
3142             -mthumb)              ;;
3143             -march=*)             ;;
3144             -lz)                  echo zlib.lib ;;
3145             -lx264)               echo libx264.lib ;;
3146             -l*)                  echo ${flag#-l}.lib ;;
3147             -L*)                  echo -libpath:${flag#-L} ;;
3148             *)                    echo $flag ;;
3149         esac
3150     done
3151 }
3152
3153 msvc_flags(){
3154     msvc_common_flags "$@"
3155     for flag; do
3156         case $flag in
3157             -Wall)                echo -W3 -wd4018 -wd4146 -wd4244 -wd4305     \
3158                                        -wd4554 ;;
3159             -Wextra)              echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3160                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3161                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3162                                        -wd4273 -wd4554 -wd4701 -wd4703 ;;
3163         esac
3164     done
3165 }
3166
3167 icl_flags(){
3168     msvc_common_flags "$@"
3169     for flag; do
3170         case $flag in
3171             # Despite what Intel's documentation says -Wall, which is supported
3172             # on Windows, does enable remarks so disable them here.
3173             -Wall)                echo $flag -Qdiag-disable:remark ;;
3174             -std=c99)             echo -Qstd=c99 ;;
3175         esac
3176     done
3177 }
3178
3179 suncc_flags(){
3180     for flag; do
3181         case $flag in
3182             -march=*|-mcpu=*)
3183                 case "${flag#*=}" in
3184                     native)                   echo -xtarget=native       ;;
3185                     v9|niagara)               echo -xarch=sparc          ;;
3186                     ultrasparc)               echo -xarch=sparcvis       ;;
3187                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3188                     i586|pentium)             echo -xchip=pentium        ;;
3189                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3190                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3191                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3192                     pentium4*)          echo -xtarget=pentium4           ;;
3193                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3194                     *-sse3)             echo -xarch=sse3                 ;;
3195                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3196                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3197                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3198                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3199                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3200                     k8|opteron|athlon64|athlon-fx)
3201                                                echo -xarch=sse2a         ;;
3202                     athlon*)                   echo -xarch=pentium_proa  ;;
3203                 esac
3204                 ;;
3205             -std=c99)             echo -xc99              ;;
3206             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3207             -fPIC)                echo -KPIC -xcode=pic32 ;;
3208             -W*,*)                echo $flag              ;;
3209             -f*-*|-W*|-mimpure-text)                      ;;
3210             -shared)              echo -G                 ;;
3211             *)                    echo $flag              ;;
3212         esac
3213     done
3214 }
3215
3216 probe_cc(){
3217     pfx=$1
3218     _cc=$2
3219
3220     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3221     unset _ld_o _ldflags _ld_lib _ld_path
3222     unset _depflags _DEPCMD _DEPFLAGS
3223     _flags_filter=echo
3224
3225     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3226         _type=llvm_gcc
3227         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3228         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3229         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3230         _cflags_speed='-O3'
3231         _cflags_size='-Os'
3232     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3233         _type=gcc
3234         gcc_version=$($_cc --version | head -n1)
3235         gcc_basever=$($_cc -dumpversion)
3236         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3237         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3238         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3239         if ! $_cc -dumpversion | grep -q '^2\.'; then
3240             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3241         fi
3242         _cflags_speed='-O3'
3243         _cflags_size='-Os'
3244     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3245         _type=icc
3246         _ident=$($_cc --version | head -n1)
3247         _depflags='-MMD'
3248         _cflags_speed='-O3'
3249         _cflags_size='-Os'
3250         _cflags_noopt='-O1'
3251     elif $_cc -v 2>&1 | grep -q xlc; then
3252         _type=xlc
3253         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3254         _cflags_speed='-O5'
3255         _cflags_size='-O5 -qcompact'
3256     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3257         test -d "$sysroot" || die "No valid sysroot specified."
3258         _type=armcc
3259         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3260         armcc_conf="$PWD/armcc.conf"
3261         $_cc --arm_linux_configure                 \
3262              --arm_linux_config_file="$armcc_conf" \
3263              --configure_sysroot="$sysroot"        \
3264              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3265              die "Error creating armcc configuration file."
3266         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3267         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3268         as_default="${cross_prefix}gcc"
3269         _depflags='-MMD'
3270         _cflags_speed='-O3'
3271         _cflags_size='-Os'
3272     elif $_cc -v 2>&1 | grep -q clang; then
3273         _type=clang
3274         _ident=$($_cc --version 2>/dev/null | head -n1)
3275         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3276         _cflags_speed='-O3'
3277         _cflags_size='-Os'
3278     elif $_cc -V 2>&1 | grep -q Sun; then
3279         _type=suncc
3280         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3281         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3282         _DEPFLAGS='-xM1 -xc99'
3283         _ldflags='-std=c99'
3284         _cflags_speed='-O5'
3285         _cflags_size='-O5 -xspace'
3286         _flags_filter=suncc_flags
3287     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3288         _type=pathscale
3289         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3290         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3291         _cflags_speed='-O2'
3292         _cflags_size='-Os'
3293         _flags_filter='filter_out -Wdisabled-optimization'
3294     elif $_cc -v 2>&1 | grep -q Open64; then
3295         _type=open64
3296         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3297         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3298         _cflags_speed='-O2'
3299         _cflags_size='-Os'
3300         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3301     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3302         _type=armasm
3303         _ident=$($_cc | head -n1)
3304         # 4509: "This form of conditional instruction is deprecated"
3305         _flags="-nologo -ignore 4509"
3306         _flags_filter=armasm_flags
3307     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3308         _type=msvc
3309         _ident=$($_cc 2>&1 | head -n1)
3310         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3311         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3312         _cflags_speed="-O2"
3313         _cflags_size="-O1"
3314         _cflags_noopt="-O1"
3315         if $_cc -nologo- 2>&1 | grep -q Linker; then
3316             _ld_o='-out:$@'
3317         else
3318             _ld_o='-Fe$@'
3319         fi
3320         _cc_o='-Fo$@'
3321         _cc_e='-P -Fi$@'
3322         _flags_filter=msvc_flags
3323         _ld_lib='lib%.a'
3324         _ld_path='-libpath:'
3325         _flags='-nologo'
3326     elif $_cc 2>&1 | grep -q Intel; then
3327         _type=icl
3328         _ident=$($_cc 2>&1 | head -n1)
3329         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3330         # Not only is O3 broken on 13.x+ but it is slower on all previous
3331         # versions (tested) as well.
3332         _cflags_speed="-O2"
3333         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3334         if $_cc 2>&1 | grep -q Linker; then
3335             _ld_o='-out:$@'
3336         else
3337             _ld_o='-Fe$@'
3338         fi
3339         _cc_o='-Fo$@'
3340         _cc_e='-P'
3341         _flags_filter=icl_flags
3342         _ld_lib='lib%.a'
3343         _ld_path='-libpath:'
3344         # -Qdiag-error to make icl error when seeing certain unknown arguments
3345         _flags='-nologo -Qdiag-error:4044,10157'
3346         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3347         # with MSVC which enables it by default.
3348         _cflags='-Qms0 -Qvec- -Qsimd- -GS'
3349     elif $_cc -? 2>/dev/null | grep -q 'LLVM.*Linker'; then
3350         # lld can emulate multiple different linkers; in ms link.exe mode,
3351         # the -? parameter gives the help output which contains an identifyable
3352         # string, while it gives an error in other modes.
3353         _type=lld-link
3354         # The link.exe mode doesn't have a switch for getting the version,
3355         # but we can force it back to gnu mode and get the version from there.
3356         _ident=$($_cc -flavor gnu --version 2>/dev/null)
3357         _ld_o='-out:$@'
3358         _flags_filter=msvc_flags
3359         _ld_lib='lib%.a'
3360         _ld_path='-libpath:'
3361     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3362         _type=cparser
3363         _ident=$($_cc --version | head -n1)
3364         _depflags='-MMD'
3365         _cflags_speed='-O4'
3366         _cflags_size='-O2'
3367         _flags_filter=cparser_flags
3368     fi
3369
3370     eval ${pfx}_type=\$_type
3371     eval ${pfx}_ident=\$_ident
3372 }
3373
3374 set_ccvars(){
3375     eval ${1}_C=\${_cc_c-\${${1}_C}}
3376     eval ${1}_E=\${_cc_e-\${${1}_E}}
3377     eval ${1}_O=\${_cc_o-\${${1}_O}}
3378
3379     if [ -n "$_depflags" ]; then
3380         eval ${1}_DEPFLAGS=\$_depflags
3381     else
3382         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3383         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3384         eval DEP${1}FLAGS=\$_flags
3385     fi
3386 }
3387
3388 probe_cc cc "$cc"
3389 cflags_filter=$_flags_filter
3390 cflags_speed=$_cflags_speed
3391 cflags_size=$_cflags_size
3392 cflags_noopt=$_cflags_noopt
3393 add_cflags $_flags $_cflags
3394 cc_ldflags=$_ldflags
3395 set_ccvars CC
3396
3397 probe_cc hostcc "$host_cc"
3398 host_cflags_filter=$_flags_filter
3399 host_cflags_speed=$_cflags_speed
3400 add_host_cflags  $_flags $_cflags
3401 set_ccvars HOSTCC
3402
3403 test -n "$cc_type" && enable $cc_type ||
3404     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3405
3406 : ${as_default:=$cc}
3407 : ${objcc_default:=$cc}
3408 : ${dep_cc_default:=$cc}
3409 : ${ld_default:=$cc}
3410 : ${host_ld_default:=$host_cc}
3411 set_default ar as objcc dep_cc ld host_ld
3412
3413 probe_cc as "$as"
3414 asflags_filter=$_flags_filter
3415 add_asflags $_flags $_cflags
3416 set_ccvars AS
3417
3418 probe_cc objcc "$objcc"
3419 objcflags_filter=$_flags_filter
3420 add_objcflags $_flags $_cflags
3421 set_ccvars OBJC
3422
3423 probe_cc ld "$ld"
3424 ldflags_filter=$_flags_filter
3425 add_ldflags $_flags $_ldflags
3426 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3427 LD_O=${_ld_o-$LD_O}
3428 LD_LIB=${_ld_lib-$LD_LIB}
3429 LD_PATH=${_ld_path-$LD_PATH}
3430
3431 probe_cc hostld "$host_ld"
3432 host_ldflags_filter=$_flags_filter
3433 add_host_ldflags $_flags $_ldflags
3434 HOSTLD_O=${_ld_o-$HOSTLD_O}
3435
3436 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3437     probe_cc depcc "$dep_cc"
3438     CCDEP=${_DEPCMD:-$DEPCMD}
3439     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3440     DEPCCFLAGS=$_flags
3441 fi
3442
3443 if $ar 2>&1 | grep -q Microsoft; then
3444     arflags="-nologo"
3445     ar_o='-out:$@'
3446 else
3447     arflags="rc"
3448     ar_o='$@'
3449 fi
3450
3451 add_cflags $extra_cflags
3452 add_objcflags $extra_objcflags
3453 add_asflags $extra_cflags
3454
3455 if test -n "$sysroot"; then
3456     case "$cc_type" in
3457         gcc|llvm_gcc|clang)
3458             add_cppflags --sysroot="$sysroot"
3459             add_ldflags --sysroot="$sysroot"
3460         ;;
3461     esac
3462 fi
3463
3464 if test "$cpu" = host; then
3465     enabled cross_compile &&
3466         die "--cpu=host makes no sense when cross-compiling."
3467
3468     case "$cc_type" in
3469         gcc|llvm_gcc)
3470             check_native(){
3471                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3472                 sed -n "/cc1.*$1=/{
3473                             s/.*$1=\\([^ ]*\\).*/\\1/
3474                             p
3475                             q
3476                         }" $TMPE
3477             }
3478             cpu=$(check_native -march || check_native -mcpu)
3479         ;;
3480     esac
3481
3482     test "${cpu:-host}" = host &&
3483         die "--cpu=host not supported with compiler $cc"
3484 fi
3485
3486 # Deal with common $arch aliases
3487 case "$arch" in
3488     aarch64|arm64)
3489         arch="aarch64"
3490     ;;
3491     arm*)
3492         arch="arm"
3493     ;;
3494     mips*|IP*)
3495         case "$arch" in
3496         *el)
3497             add_cppflags -EL
3498             add_ldflags -EL
3499         ;;
3500         *eb)
3501             add_cppflags -EB
3502             add_ldflags -EB
3503         ;;
3504         esac
3505         arch="mips"
3506     ;;
3507     parisc*|hppa*)
3508         arch="parisc"
3509     ;;
3510     "Power Macintosh"|ppc*|powerpc*)
3511         arch="ppc"
3512     ;;
3513     s390|s390x)
3514         arch="s390"
3515     ;;
3516     sh4|sh)
3517         arch="sh4"
3518     ;;
3519     sun4u|sparc*)
3520         arch="sparc"
3521     ;;
3522     tilegx|tile-gx)
3523         arch="tilegx"
3524     ;;
3525     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3526         arch="x86"
3527     ;;
3528 esac
3529
3530 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3531 enable $arch
3532
3533 # Add processor-specific flags
3534 if enabled aarch64; then
3535
3536     case $cpu in
3537         armv*)
3538             cpuflags="-march=$cpu"
3539         ;;
3540         *)
3541             cpuflags="-mcpu=$cpu"
3542         ;;
3543     esac
3544
3545 elif enabled alpha; then
3546
3547     cpuflags="-mcpu=$cpu"
3548
3549 elif enabled arm; then
3550
3551     check_arm_arch() {
3552         check_cpp_condition stddef.h \
3553             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3554             $cpuflags
3555     }
3556
3557     probe_arm_arch() {
3558         if   check_arm_arch 4;        then echo armv4
3559         elif check_arm_arch 4T;       then echo armv4t
3560         elif check_arm_arch 5;        then echo armv5
3561         elif check_arm_arch 5E;       then echo armv5e
3562         elif check_arm_arch 5T;       then echo armv5t
3563         elif check_arm_arch 5TE;      then echo armv5te
3564         elif check_arm_arch 5TEJ;     then echo armv5te
3565         elif check_arm_arch 6;        then echo armv6
3566         elif check_arm_arch 6J;       then echo armv6j
3567         elif check_arm_arch 6K;       then echo armv6k
3568         elif check_arm_arch 6Z;       then echo armv6z
3569         elif check_arm_arch 6ZK;      then echo armv6zk
3570         elif check_arm_arch 6T2;      then echo armv6t2
3571         elif check_arm_arch 7;        then echo armv7
3572         elif check_arm_arch 7A  7_A;  then echo armv7-a
3573         elif check_arm_arch 7S;       then echo armv7-a
3574         elif check_arm_arch 7R  7_R;  then echo armv7-r
3575         elif check_arm_arch 7M  7_M;  then echo armv7-m
3576         elif check_arm_arch 7EM 7E_M; then echo armv7-m
3577         elif check_arm_arch 8A  8_A;  then echo armv8-a
3578         fi
3579     }
3580
3581     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3582
3583     case $cpu in
3584         armv*)
3585             cpuflags="-march=$cpu"
3586             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3587         ;;
3588         *)
3589             cpuflags="-mcpu=$cpu"
3590             case $cpu in
3591                 cortex-a*)                               subarch=armv7a  ;;
3592                 cortex-r*)                               subarch=armv7r  ;;
3593                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3594                 arm11*)                                  subarch=armv6   ;;
3595                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3596                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3597                 *)                             subarch=$(probe_arm_arch) ;;
3598             esac
3599         ;;
3600     esac
3601
3602     case "$subarch" in
3603         armv5t*)    enable fast_clz                ;;
3604         armv[6-8]*) enable fast_clz fast_unaligned ;;
3605     esac
3606
3607 elif enabled avr32; then
3608
3609     case $cpu in
3610         ap7[02]0[0-2])
3611             subarch="avr32_ap"
3612             cpuflags="-mpart=$cpu"
3613         ;;
3614         ap)
3615             subarch="avr32_ap"
3616             cpuflags="-march=$cpu"
3617         ;;
3618         uc3[ab]*)
3619             subarch="avr32_uc"
3620             cpuflags="-mcpu=$cpu"
3621         ;;
3622         uc)
3623             subarch="avr32_uc"
3624             cpuflags="-march=$cpu"
3625         ;;
3626     esac
3627
3628 elif enabled bfin; then
3629
3630     cpuflags="-mcpu=$cpu"
3631
3632 elif enabled mips; then
3633
3634     cpuflags="-march=$cpu"
3635
3636 elif enabled ppc; then
3637
3638     disable ldbrx
3639
3640     case $(tolower $cpu) in
3641         601|ppc601|powerpc601)
3642             cpuflags="-mcpu=601"
3643             disable altivec
3644         ;;
3645         603*|ppc603*|powerpc603*)
3646             cpuflags="-mcpu=603"
3647             disable altivec
3648         ;;
3649         604*|ppc604*|powerpc604*)
3650             cpuflags="-mcpu=604"
3651             disable altivec
3652         ;;
3653         g3|75*|ppc75*|powerpc75*)
3654             cpuflags="-mcpu=750"
3655             disable altivec
3656         ;;
3657         g4|745*|ppc745*|powerpc745*)
3658             cpuflags="-mcpu=7450"
3659             disable vsx
3660         ;;
3661         74*|ppc74*|powerpc74*)
3662             cpuflags="-mcpu=7400"
3663             disable vsx
3664         ;;
3665         g5|970|ppc970|powerpc970)
3666             cpuflags="-mcpu=970"
3667             disable vsx
3668         ;;
3669         power[3-6]*)
3670             cpuflags="-mcpu=$cpu"
3671             disable vsx
3672         ;;
3673         power[7-8]*)
3674             cpuflags="-mcpu=$cpu"
3675             enable ldbrx
3676         ;;
3677         cell)
3678             cpuflags="-mcpu=cell"
3679             enable ldbrx
3680             disable vsx
3681         ;;
3682         e500mc)
3683             cpuflags="-mcpu=e500mc"
3684             disable altivec
3685         ;;
3686         e500v2)
3687             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3688             disable altivec
3689             disable dcbzl
3690         ;;
3691         e500)
3692             cpuflags="-mcpu=8540 -mhard-float"
3693             disable altivec
3694             disable dcbzl
3695         ;;
3696     esac
3697
3698 elif enabled sparc; then
3699
3700     case $cpu in
3701         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3702             cpuflags="-mcpu=$cpu"
3703         ;;
3704         ultrasparc*|niagara[234])
3705             cpuflags="-mcpu=$cpu"
3706         ;;
3707     esac
3708
3709 elif enabled x86; then
3710
3711     case $cpu in
3712         i[345]86|pentium)
3713             cpuflags="-march=$cpu"
3714             disable i686
3715             disable mmx
3716         ;;
3717         # targets that do NOT support nopl and conditional mov (cmov)
3718         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3719             cpuflags="-march=$cpu"
3720             disable i686
3721         ;;
3722         # targets that do support nopl and conditional mov (cmov)
3723         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3724             cpuflags="-march=$cpu"
3725             enable i686
3726             enable fast_cmov
3727         ;;
3728         # targets that do support conditional mov but on which it's slow
3729         pentium4|pentium4m|prescott|nocona)
3730             cpuflags="-march=$cpu"
3731             enable i686
3732             disable fast_cmov
3733         ;;
3734     esac
3735
3736 fi
3737
3738 if [ "$cpu" != generic ]; then
3739     add_cflags  $cpuflags
3740     add_asflags $cpuflags
3741     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3742 fi
3743
3744 # compiler sanity check
3745 check_exec <<EOF
3746 int main(void){ return 0; }
3747 EOF
3748 if test "$?" != 0; then
3749     echo "$cc is unable to create an executable file."
3750     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3751         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3752         echo "Only do this if you know what cross compiling means."
3753     fi
3754     die "C compiler test failed."
3755 fi
3756
3757 add_cppflags -D_ISOC99_SOURCE
3758
3759 # some compilers silently accept -std=c11, so we also need to check that the
3760 # version macro is defined properly
3761 check_cpp_condition stdlib.h  "__STDC_VERSION__ >= 201112L" -std=c11 &&
3762     add_cflags -std=c11 ||
3763     check_cflags -std=c99
3764
3765 check_cppflags -D_FILE_OFFSET_BITS=64
3766 check_cppflags -D_LARGEFILE_SOURCE
3767
3768 add_host_cppflags -D_ISOC99_SOURCE
3769 check_host_cflags -std=c99
3770 check_host_cflags -Wall
3771 check_host_cflags $host_cflags_speed
3772
3773 check_64bit(){
3774     arch32=$1
3775     arch64=$2
3776     expr=$3
3777     check_code cc "" "int test[2*($expr) - 1]" &&
3778         subarch=$arch64 || subarch=$arch32
3779     enable $subarch
3780 }
3781
3782 case "$arch" in
3783     aarch64|alpha|ia64)
3784         enabled shared && enable_weak pic
3785     ;;
3786     mips)
3787         check_64bit mips mips64 '_MIPS_SIM > 1'
3788         enabled shared && enable_weak pic
3789     ;;
3790     parisc)
3791         check_64bit parisc parisc64 'sizeof(void *) > 4'
3792         enabled shared && enable_weak pic
3793     ;;
3794     ppc)
3795         check_64bit ppc ppc64 'sizeof(void *) > 4'
3796         enabled shared && enable_weak pic
3797     ;;
3798     s390)
3799         check_64bit s390 s390x 'sizeof(void *) > 4'
3800         enabled shared && enable_weak pic
3801     ;;
3802     sparc)
3803         check_64bit sparc sparc64 'sizeof(void *) > 4'
3804         enabled shared && enable_weak pic
3805     ;;
3806     x86)
3807         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3808         if enabled x86_64; then
3809             enabled shared && enable_weak pic
3810             objformat=elf64
3811         fi
3812     ;;
3813 esac
3814
3815 # OS specific
3816 case $target_os in
3817     aix)
3818         SHFLAGS=-shared
3819         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3820         enabled shared && add_ldflags -Wl,-brtl
3821         arflags='-Xany -r -c'
3822         ;;
3823     android)
3824         disable symver
3825         enable section_data_rel_ro
3826         SLIB_INSTALL_NAME='$(SLIBNAME)'
3827         SLIB_INSTALL_LINKS=
3828         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3829         ;;
3830     haiku)
3831         prefix_default="/boot/common"
3832         network_extralibs="-lnetwork"
3833         host_extralibs=
3834         ;;
3835     sunos)
3836         SHFLAGS='-shared -Wl,-h,$$(@F)'
3837         enabled x86 && append SHFLAGS -mimpure-text
3838         network_extralibs="-lsocket -lnsl"
3839         # When using suncc to build, the Solaris linker will mark
3840         # an executable with each instruction set encountered by
3841         # the Solaris assembler.  As our libraries contain their own
3842         # guards for processor-specific code, instead suppress
3843         # generation of the HWCAPS ELF section on Solaris x86 only.
3844         enabled_all suncc x86 &&
3845             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3846             add_ldflags -Wl,-M,mapfile
3847         nm_default='nm -P -g'
3848         version_script='-M'
3849         VERSION_SCRIPT_POSTPROCESS_CMD='perl $(SRC_PATH)/compat/solaris/make_sunver.pl - $(OBJS)'
3850         ;;
3851     netbsd)
3852         disable symver
3853         oss_indev_extralibs="-lossaudio"
3854         ;;
3855     openbsd|bitrig)
3856         disable symver
3857         SHFLAGS='-shared'
3858         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3859         SLIB_INSTALL_LINKS=
3860         oss_indev_extralibs="-lossaudio"
3861         ;;
3862     dragonfly)
3863         disable symver
3864         ;;
3865     freebsd)
3866         ;;
3867     bsd/os)
3868         add_extralibs -lpoll -lgnugetopt
3869         ;;
3870     darwin)
3871         enabled ppc && add_asflags -force_cpusubtype_ALL
3872         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3873         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3874         add_ldflags -Wl,-dynamic,-search_paths_first
3875         check_cflags -Werror=partial-availability
3876         SLIBSUF=".dylib"
3877         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME).$(LIBVERSION)$(SLIBSUF)'
3878         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME).$(LIBMAJOR)$(SLIBSUF)'
3879         enabled x86_64 && objformat="macho64" || objformat="macho32"
3880         enabled_any pic shared ||
3881             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3882         check_header dispatch/dispatch.h &&
3883             add_cppflags '-I\$(SRC_PATH)/compat/dispatch_semaphore'
3884         if test -n "$sysroot"; then
3885             is_in -isysroot $cc $CPPFLAGS $CFLAGS || check_cppflags -isysroot $sysroot
3886             is_in -isysroot $ld $LDFLAGS          || check_ldflags  -isysroot $sysroot
3887         fi
3888         ;;
3889     msys*)
3890         die "Native MSYS builds are discouraged, please use the MINGW environment."
3891         ;;
3892     mingw32*|mingw64*)
3893         target_os=mingw32
3894         if enabled shared; then
3895             # Cannot build both shared and static libs when using dllimport.
3896             disable static
3897         fi
3898         check_ldflags -Wl,--nxcompat
3899         check_ldflags -Wl,--dynamicbase
3900         shlibdir_default="$bindir_default"
3901         SLIBPREF=""
3902         SLIBSUF=".dll"
3903         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3904         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3905         SLIB_EXTRA_CMD='cp $(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3906         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3907         SLIB_INSTALL_LINKS=
3908         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3909         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3910         SLIB_CREATE_DEF_CMD='EXTERN_PREFIX="$(EXTERN_PREFIX)" AR="$(AR_CMD)" NM="$(NM_CMD)" $(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3911         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-auto-image-base $$(@:$(SLIBSUF)=.def)'
3912         enabled x86_64 && objformat="win64" || objformat="win32"
3913         ranlib=:
3914         enable dos_paths
3915         ;;
3916     win32|win64)
3917         disable symver
3918         if enabled shared; then
3919             # Link to the import library instead of the normal static library
3920             # for shared libs.
3921             LD_LIB='%.lib'
3922             # Cannot build both shared and static libs with MSVC or icl.
3923             disable static
3924         fi
3925         shlibdir_default="$bindir_default"
3926         SLIBPREF=""
3927         SLIBSUF=".dll"
3928         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3929         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3930         SLIB_CREATE_DEF_CMD='EXTERN_PREFIX="$(EXTERN_PREFIX)" $(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3931         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3932         SLIB_INSTALL_LINKS=
3933         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3934         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3935         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3936         enabled x86_64 && objformat="win64" || objformat="win32"
3937         ranlib=:
3938         enable dos_paths
3939         ;;
3940     cygwin*)
3941         target_os=cygwin
3942         shlibdir_default="$bindir_default"
3943         SLIBPREF="cyg"
3944         SLIBSUF=".dll"
3945         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3946         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3947         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3948         SLIB_INSTALL_LINKS=
3949         SLIB_INSTALL_EXTRA_LIB='lib$(NAME).dll.a'
3950         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(NAME).dll.a'
3951         enabled x86_64 && objformat="win64" || objformat="win32"
3952         enable dos_paths
3953         ;;
3954     *-dos|freedos|opendos)
3955         network_extralibs="-lsocket"
3956         objformat="coff"
3957         enable dos_paths
3958         add_cppflags -U__STRICT_ANSI__
3959         ;;
3960     linux)
3961         enable section_data_rel_ro
3962         ;;
3963     irix*)
3964         target_os=irix
3965         ranlib="echo ignoring ranlib"
3966         ;;
3967     os/2*)
3968         ln_s="cp -f"
3969         objformat="aout"
3970         add_cppflags -D_GNU_SOURCE
3971         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zhigh-mem -Zmap
3972         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3973         LIBSUF="_s.a"
3974         SLIBPREF=""
3975         SLIBSUF=".dll"
3976         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3977         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3978         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3979             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3980             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3981             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3982             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3983         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3984             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3985         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3986         enable dos_paths
3987         ;;
3988     gnu/kfreebsd)
3989         add_cppflags -D_BSD_SOURCE
3990         ;;
3991     gnu)
3992         ;;
3993     qnx)
3994         add_cppflags -D_QNX_SOURCE
3995         network_extralibs="-lsocket"
3996         ;;
3997     symbian)
3998         SLIBSUF=".dll"
3999         enable dos_paths
4000         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
4001         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
4002         add_ldflags -Wl,--target1-abs,--no-undefined \
4003                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
4004                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
4005         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
4006                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
4007                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
4008         ;;
4009     minix)
4010         ;;
4011     none)
4012         ;;
4013     *)
4014         die "Unknown OS '$target_os'."
4015         ;;
4016 esac
4017
4018 # determine libc flavour
4019
4020 probe_libc(){
4021     pfx=$1
4022     pfx_no_=${pfx%_}
4023     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
4024     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
4025         eval ${pfx}libc_type=uclibc
4026         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4027     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
4028         eval ${pfx}libc_type=glibc
4029         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4030     # MinGW headers can be installed on Cygwin, so check for newlib first.
4031     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
4032         eval ${pfx}libc_type=newlib
4033         add_${pfx}cppflags -U__STRICT_ANSI__ -D_XOPEN_SOURCE=600
4034     # MinGW64 is backwards compatible with MinGW32, so check for it first.
4035     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
4036         eval ${pfx}libc_type=mingw64
4037         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4038         eval test \$${pfx_no_}cc_type = "gcc" &&
4039             add_${pfx}cppflags -D__printf__=__gnu_printf__
4040     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
4041          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
4042         eval ${pfx}libc_type=mingw32
4043         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
4044             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
4045             die "ERROR: MinGW32 runtime version must be >= 3.15."
4046         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4047         check_${pfx}cpp_condition _mingw.h "__MSVCRT_VERSION__ < 0x0700" &&
4048             add_${pfx}cppflags -D__MSVCRT_VERSION__=0x0700
4049         check_${pfx}cpp_condition windows.h "defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0502" &&
4050             add_${pfx}cppflags -D_WIN32_WINNT=0x0502
4051         eval test \$${pfx_no_}cc_type = "gcc" &&
4052             add_${pfx}cppflags -D__printf__=__gnu_printf__
4053     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
4054         eval ${pfx}libc_type=msvcrt
4055         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
4056             if [ "$pfx" = host_ ]; then
4057                 add_host_cppflags -Dsnprintf=_snprintf
4058             else
4059                 add_compat strtod.o strtod=avpriv_strtod
4060                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
4061                                              _snprintf=avpriv_snprintf  \
4062                                              vsnprintf=avpriv_vsnprintf
4063             fi
4064         fi
4065         add_${pfx}cppflags -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS
4066         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
4067         # 0x601 by default unless something else is set by the user.
4068         # This can easily lead to us detecting functions only present
4069         # in such new versions and producing binaries requiring windows 7.0.
4070         # Therefore explicitly set the default to XP unless the user has
4071         # set something else on the command line.
4072         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
4073         # family. For these cases, configure is free to use any functions
4074         # found in the SDK headers by default. (Alternatively, we could force
4075         # _WIN32_WINNT to 0x0602 in that case.)
4076         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
4077             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
4078 #ifdef WINAPI_FAMILY
4079 #include <winapifamily.h>
4080 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4081 #error not desktop
4082 #endif
4083 #endif
4084 EOF
4085         if [ "$pfx" = "" ]; then
4086             check_func strtoll || add_cflags -Dstrtoll=_strtoi64
4087         fi
4088     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4089         eval ${pfx}libc_type=klibc
4090     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4091         eval ${pfx}libc_type=bionic
4092     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4093         eval ${pfx}libc_type=solaris
4094         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4095     else
4096         eval ${pfx}libc_type=default
4097         add_${pfx}cppflags -D_DEFAULT_SOURCE
4098     fi
4099     eval test -n "\${${pfx}libc_type}" && enable ${pfx}libc_${libc_type}
4100 }
4101
4102 probe_libc
4103 probe_libc host_
4104
4105 # hacks for compiler/libc/os combinations
4106
4107 case $libc_type in
4108     bionic)
4109         add_compat strtod.o strtod=avpriv_strtod
4110         ;;
4111 esac
4112
4113 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4114     add_cppflags '-I\$(SRC_PATH)/compat/float'
4115
4116 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4117
4118 set_default $PATHS_LIST
4119 set_default nm
4120
4121 disabled optimizations || check_cflags -fomit-frame-pointer
4122
4123 enable_weak_pic() {
4124     disabled pic && return
4125     enable pic
4126     add_cppflags -DPIC
4127     case "$target_os" in
4128     mingw*|cygwin*|win*)
4129         ;;
4130     *)
4131         add_cflags -fPIC
4132         add_asflags -fPIC
4133         ;;
4134     esac
4135 }
4136
4137 enabled pic && enable_weak_pic
4138
4139 check_cc <<EOF || die "Symbol mangling check failed."
4140 int ff_extern;
4141 EOF
4142 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4143 extern_prefix=${sym%%ff_extern*}
4144
4145 ! disabled inline_asm && check_inline_asm inline_asm '"" ::'
4146
4147 for restrict_keyword in restrict __restrict__ __restrict ""; do
4148     check_cc <<EOF && break
4149 void foo(char * $restrict_keyword p);
4150 EOF
4151 done
4152
4153 check_cc <<EOF && enable pragma_deprecated
4154 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4155 EOF
4156
4157 check_cc <<EOF || die "endian test failed"
4158 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4159 EOF
4160 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4161
4162 check_gas() {
4163     log "check_gas using '$as' as AS"
4164     # :vararg is used on aarch64, arm and ppc altivec
4165     check_as <<EOF || return 1
4166 .macro m n, y:vararg=0
4167 \n: .int \y
4168 .endm
4169 m x
4170 EOF
4171     # .altmacro is only used in arm asm
4172     ! enabled arm || check_as <<EOF || return 1
4173 .altmacro
4174 EOF
4175     enable gnu_as
4176     return 0
4177 }
4178
4179 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4180     nogas=:
4181     enabled_any arm aarch64 && nogas=die
4182     enabled_all ppc altivec && nogas=warn
4183     as_noop=-v
4184
4185     case $as_type in
4186         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4187         gcc)  gaspp_as_type=gas ;;
4188         *)    gaspp_as_type=$as_type ;;
4189     esac
4190
4191     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4192
4193     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4194         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4195
4196     if ! check_gas ; then
4197         as=${gas:=$as}
4198         check_gas || \
4199             $nogas "GNU assembler not found, install/update gas-preprocessor"
4200     fi
4201
4202     check_as <<EOF && enable as_func
4203 .func test
4204 .endfunc
4205 EOF
4206 fi
4207
4208 check_inline_asm inline_asm_labels '"1:\n"'
4209
4210 if enabled aarch64; then
4211     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4212     # internal assembler in clang 3.3 does not support this instruction
4213     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4214     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4215
4216     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4217
4218 elif enabled alpha; then
4219
4220     check_cflags -mieee
4221
4222 elif enabled arm; then
4223
4224     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4225     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4226     enabled thumb && check_cflags -mthumb || check_cflags -marm
4227
4228     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4229         enable vfp_args
4230     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4231         enable vfp_args
4232     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4233         case "${cross_prefix:-$cc}" in
4234             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4235             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4236 __asm__ (".eabi_attribute 28, 1");
4237 int main(void) { return 0; }
4238 EOF
4239         esac
4240         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4241     fi
4242
4243     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4244     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4245     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4246     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4247     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4248     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4249
4250     [ $target_os = linux ] || [ $target_os = android ] ||
4251         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4252             $ARCH_EXT_LIST_ARM
4253
4254     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4255
4256     check_as <<EOF && enable as_arch_directive
4257 .arch armv7-a
4258 EOF
4259     check_as <<EOF && enable as_fpu_directive
4260 .fpu neon
4261 EOF
4262
4263     # llvm's integrated assembler supports .object_arch from llvm 3.5
4264     [ "$objformat" = elf32 ] || [ "$objformat" = elf64 ] &&
4265         check_as <<EOF && enable as_object_arch
4266 .object_arch armv4
4267 EOF
4268
4269     # MS armasm fails to assemble our PIC constructs
4270     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4271
4272 elif enabled mips; then
4273
4274     # make sure that only one instruction set is enabled
4275     disable $ARCH_EXT_LIST_MIPS
4276
4277     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4278
4279     if enabled mips64; then
4280         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4281             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4282                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4283     else
4284         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4285             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4286                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4287     fi
4288
4289 elif enabled parisc; then
4290
4291     if enabled gcc; then
4292         case $($cc -dumpversion) in
4293             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4294         esac
4295     fi
4296
4297 elif enabled ppc; then
4298
4299     enable local_aligned_8 local_aligned_16 local_aligned_32
4300
4301     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4302     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4303     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4304     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4305
4306     if enabled altivec; then
4307         check_cflags -maltivec -mabi=altivec
4308
4309         # check if our compiler supports Motorola AltiVec C API
4310         check_code cc altivec.h "vector signed int v1 = (vector signed int) { 0 };
4311                                  vector signed int v2 = (vector signed int) { 1 };
4312                                  v1 = vec_add(v1, v2);" ||
4313             disable altivec
4314
4315         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4316     fi
4317
4318     if enabled vsx; then
4319         check_cflags -mvsx &&
4320         check_code cc altivec.h "int v[4] = { 0 };
4321                                  vector signed int v1 = vec_vsx_ld(0, v);" ||
4322             disable vsx
4323     fi
4324
4325     if enabled power8; then
4326         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4327     fi
4328
4329 elif enabled x86; then
4330
4331     check_builtin rdtsc    intrin.h   "__rdtsc()"
4332     check_builtin mm_empty mmintrin.h "_mm_empty()"
4333
4334     enable local_aligned_8 local_aligned_16 local_aligned_32
4335
4336     # check whether EBP is available on x86
4337     # As 'i' is stored on the stack, this program will crash
4338     # if the base pointer is used to access it because the
4339     # base pointer is cleared in the inline assembly code.
4340     check_exec_crash <<EOF && enable ebp_available
4341 volatile int i=0;
4342 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4343 return i;
4344 EOF
4345
4346     # check whether EBX is available on x86
4347     check_inline_asm ebx_available '""::"b"(0)' &&
4348         check_inline_asm ebx_available '"":::"%ebx"'
4349
4350     # check whether xmm clobbers are supported
4351     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4352
4353     # check whether binutils is new enough to compile SSSE3/MMXEXT
4354     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4355     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4356
4357     probe_x86asm(){
4358         x86asmexe_probe=$1
4359         if check_cmd $x86asmexe_probe -v; then
4360             x86asmexe=$x86asmexe_probe
4361             x86asm_type=nasm
4362             x86asm_debug="-g -F dwarf"
4363             X86ASMDEP=
4364             X86ASM_DEPFLAGS='-MD $(@:.o=.d)'
4365         elif check_cmd $x86asmexe_probe --version; then
4366             x86asmexe=$x86asmexe_probe
4367             x86asm_type=yasm
4368             x86asm_debug="-g dwarf2"
4369             X86ASMDEP='$(DEPX86ASM) $(X86ASMFLAGS) -M $(X86ASM_O) $< > $(@:.o=.d)'
4370             X86ASM_DEPFLAGS=
4371         fi
4372         check_x86asm "movbe ecx, [5]" && enable x86asm
4373     }
4374
4375     if ! disabled_any asm mmx x86asm; then
4376         disable x86asm
4377         for program in $x86asmexe nasm yasm; do
4378             probe_x86asm $program && break
4379         done
4380         disabled x86asm && die "nasm/yasm not found or too old. Use --disable-x86asm for a crippled build."
4381         X86ASMFLAGS="-f $objformat"
4382         enabled pic               && append X86ASMFLAGS "-DPIC"
4383         test -n "$extern_prefix"  && append X86ASMFLAGS "-DPREFIX"
4384         case "$objformat" in
4385             elf*) enabled debug && append X86ASMFLAGS $x86asm_debug ;;
4386         esac
4387
4388         check_x86asm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4389         check_x86asm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4390         check_x86asm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4391         check_x86asm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4392         check_x86asm "CPU amdnop"                      || disable cpunop
4393     fi
4394
4395     case "$cpu" in
4396         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4397             disable fast_clz
4398         ;;
4399     esac
4400
4401 fi
4402
4403 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4404
4405 check_ldflags -Wl,--as-needed
4406
4407 if ! disabled network; then
4408     check_func getaddrinfo $network_extralibs
4409     check_func inet_aton $network_extralibs
4410
4411     check_type netdb.h "struct addrinfo"
4412     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4413     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4414     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4415     check_type poll.h "struct pollfd"
4416     check_type netinet/sctp.h "struct sctp_event_subscribe"
4417     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4418     check_type netinet/in.h "struct sockaddr_in6"
4419     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4420     check_type "sys/types.h sys/socket.h" socklen_t
4421
4422     # Prefer arpa/inet.h over winsock2
4423     if check_header arpa/inet.h ; then
4424         check_func closesocket
4425     elif check_header winsock2.h ; then
4426         check_func_headers winsock2.h closesocket -lws2 &&
4427             network_extralibs="-lws2" ||
4428         { check_func_headers winsock2.h closesocket -lws2_32 &&
4429             network_extralibs="-lws2_32"; } || disable winsock2_h network
4430         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4431
4432         check_type ws2tcpip.h socklen_t
4433         check_type ws2tcpip.h "struct addrinfo"
4434         check_type ws2tcpip.h "struct group_source_req"
4435         check_type ws2tcpip.h "struct ip_mreq_source"
4436         check_type ws2tcpip.h "struct ipv6_mreq"
4437         check_type winsock2.h "struct pollfd"
4438         check_struct winsock2.h "struct sockaddr" sa_len
4439         check_type ws2tcpip.h "struct sockaddr_in6"
4440         check_type ws2tcpip.h "struct sockaddr_storage"
4441     else
4442         disable network
4443     fi
4444 fi
4445
4446 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4447 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4448 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4449 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4450
4451 case "$custom_allocator" in
4452     jemalloc)
4453         # jemalloc by default does not use a prefix
4454         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4455     ;;
4456     tcmalloc)
4457         require_pkg_config libtcmalloc libtcmalloc gperftools/tcmalloc.h tc_malloc
4458         malloc_prefix=tc_
4459     ;;
4460 esac
4461
4462 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4463 check_func  ${malloc_prefix}memalign            && enable memalign
4464 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4465
4466 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4467     { check_lib clock_gettime time.h clock_gettime ||
4468       check_lib clock_gettime time.h clock_gettime -lrt; }
4469
4470 check_func  fcntl
4471 check_func  gethrtime
4472 check_func  getopt
4473 check_func  getrusage
4474 check_func  gettimeofday
4475 check_func  gmtime_r
4476 check_func  isatty
4477 check_func  localtime_r
4478 check_func  mkstemp
4479 check_func  mmap
4480 check_func  mprotect
4481 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4482 check_func_headers time.h nanosleep || check_lib nanosleep time.h nanosleep -lrt
4483 check_func  sched_getaffinity
4484 check_func  setrlimit
4485 check_func  strerror_r
4486 check_func  sysconf
4487 check_func  sysctl
4488 check_func  usleep
4489
4490 check_func_headers io.h setmode
4491 check_func_headers mach/mach_time.h mach_absolute_time
4492 check_func_headers stdlib.h getenv
4493
4494 check_func_headers windows.h GetProcessAffinityMask
4495 check_func_headers windows.h GetProcessTimes
4496 check_func_headers windows.h GetSystemTimeAsFileTime
4497 check_func_headers windows.h LoadLibrary
4498 check_func_headers windows.h MapViewOfFile
4499 check_func_headers windows.h SetConsoleTextAttribute
4500 check_func_headers windows.h Sleep
4501 check_func_headers windows.h VirtualAlloc
4502 check_struct windows.h "CONDITION_VARIABLE" Ptr
4503
4504 check_header direct.h
4505 check_header dxgidebug.h
4506 check_header dxva.h
4507 check_header dxva2api.h
4508 check_header io.h
4509 check_header malloc.h
4510 check_header poll.h
4511 check_header sys/param.h
4512 check_header sys/resource.h
4513 check_header sys/select.h
4514 check_header sys/time.h
4515 check_header sys/un.h
4516 check_header unistd.h
4517 check_header valgrind/valgrind.h
4518 check_header VideoDecodeAcceleration/VDADecoder.h
4519 check_header windows.h
4520
4521 # it seems there are versions of clang in some distros that try to use the
4522 # gcc headers, which explodes for stdatomic
4523 # so we also check that atomics actually work here
4524 check_builtin stdatomic stdatomic.h "atomic_int foo; atomic_store(&foo, 0)"
4525
4526 check_lib ole32    "windows.h"            CoTaskMemFree        -lole32
4527 check_lib shell32  "windows.h shellapi.h" CommandLineToArgvW   -lshell32
4528 check_lib wincrypt "windows.h wincrypt.h" CryptGenRandom       -ladvapi32
4529 check_lib psapi    "windows.h psapi.h"    GetProcessMemoryInfo -lpsapi
4530
4531 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4532
4533 check_type "cuviddec.h" "CUVIDH264PICPARAMS"
4534 check_type "cuviddec.h" "CUVIDHEVCPICPARAMS"
4535 check_struct "cuviddec.h" "CUVIDDECODECREATEINFO" bitDepthMinus8
4536
4537 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4538 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4539 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4540
4541 check_type "va/va.h va/va_dec_hevc.h" "VAPictureParameterBufferHEVC"
4542 check_type "va/va.h va/va_dec_vp8.h" "VAPictureParameterBufferVP8"
4543 check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
4544 check_type "va/va.h va/va_enc_h264.h" "VAEncPictureParameterBufferH264"
4545 check_type "va/va.h va/va_enc_hevc.h" "VAEncPictureParameterBufferHEVC"
4546 check_type "va/va.h va/va_enc_jpeg.h" "VAEncPictureParameterBufferJPEG"
4547 check_type "va/va.h va/va_enc_mpeg2.h" "VAEncPictureParameterBufferMPEG2"
4548 check_type "va/va.h va/va_enc_vp8.h"  "VAEncPictureParameterBufferVP8"
4549 check_type "va/va.h va/va_enc_vp9.h"  "VAEncPictureParameterBufferVP9"
4550
4551 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4552
4553 if ! disabled w32threads && ! enabled pthreads; then
4554     check_lib w32threads "windows.h process.h" _beginthreadex
4555 fi
4556
4557 # check for some common methods of building with pthread support
4558 # do this before the optional library checks as some of them require pthreads
4559 if ! disabled pthreads && ! enabled w32threads; then
4560     if check_lib pthreads pthread.h pthread_join -pthread; then
4561         add_cflags -pthread
4562     elif check_lib pthreads pthread.h pthread_join -pthreads; then
4563         add_cflags -pthreads
4564     elif check_lib pthreads pthread.h pthread_join -lpthreadGC2; then
4565         :
4566     elif check_lib pthreads pthread.h pthread_join -lpthread; then
4567         :
4568     elif check_func pthread_join; then
4569         enable pthreads
4570     fi
4571     enabled pthreads &&
4572         check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwait(s,0); sem_destroy(s)" $pthreads_extralibs
4573 fi
4574
4575 disabled  zlib || check_lib  zlib  zlib.h      zlibVersion -lz
4576 disabled bzlib || check_lib bzlib bzlib.h BZ2_bzlibVersion -lbz2
4577
4578 # On some systems dynamic loading requires no extra linker flags
4579 check_lib libdl dlfcn.h dlopen || check_lib libdl dlfcn.h dlopen -ldl
4580
4581 check_lib libm math.h sin -lm
4582
4583 atan2f_args=2
4584 ldexpf_args=2
4585 powf_args=2
4586
4587 for func in $MATH_FUNCS; do
4588     eval check_mathfunc $func \${${func}_args:-1} $libm_extralibs
4589 done
4590
4591 # these are off by default, so fail if requested and not available
4592
4593 enabled amf &&
4594     check_cpp_condition "AMF/core/Version.h" \
4595         "(AMF_VERSION_MAJOR << 48 | AMF_VERSION_MINOR << 32 | AMF_VERSION_RELEASE << 16 | AMF_VERSION_BUILD_NUM) >= 0x0001000400040001" ||
4596     disable amf
4597 enabled avisynth          && require_header avisynth/avisynth_c.h
4598 enabled avxsynth          && require_header avxsynth/avxsynth_c.h
4599 enabled cuda              && require cuda cuda.h cuInit -lcuda
4600 enabled cuvid             && require cuvid cuviddec.h cuvidCreateDecoder -lnvcuvid
4601 enabled frei0r            && require_header frei0r.h
4602 enabled gnutls            && require_pkg_config gnutls gnutls gnutls/gnutls.h gnutls_global_init &&
4603                              check_lib gmp gmp.h mpz_export -lgmp
4604 enabled libbs2b           && require_pkg_config libbs2b libbs2b bs2b.h bs2b_open
4605 enabled libdc1394         && require_pkg_config libdc1394 libdc1394-2 dc1394/dc1394.h dc1394_new
4606 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4607 enabled libfaac           && require libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4608 enabled libfdk_aac        && require_pkg_config libfdk_aac fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4609 enabled libfontconfig     && require_pkg_config libfontconfig fontconfig "fontconfig/fontconfig.h" FcInit
4610 enabled libfreetype       && require_pkg_config libfreetype freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4611 enabled libgsm            && require libgsm gsm.h gsm_create -lgsm
4612 enabled libhdcd           && require_pkg_config libhdcd libhdcd "hdcd/hdcd_simple.h" hdcd_new
4613 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4614 enabled libkvazaar        && require_pkg_config libkvazaar "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4615 enabled libmfx            && require_pkg_config libmfx libmfx "mfx/mfxvideo.h" MFXInit
4616 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4617 enabled libnpp            && require libnpp npp.h nppGetLibVersion -lnppi -lnppc
4618 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4619 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4620 enabled libopencv         && require_pkg_config libopencv opencv opencv/cv.h cvCreateImageHeader
4621 enabled libopenh264       && require_pkg_config libopenh264 openh264 wels/codec_api.h WelsGetCodecVersion
4622 enabled libopenjpeg       && { check_lib libopenjpeg openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC ||
4623                                require_pkg_config libopenjpeg libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; }
4624 enabled libopus           && require_pkg_config libopus opus opus_multistream.h opus_multistream_decoder_create
4625 enabled libpulse          && require_pkg_config libpulse libpulse-simple pulse/simple.h pa_simple_new
4626 enabled librtmp           && require_pkg_config librtmp librtmp librtmp/rtmp.h RTMP_Socket
4627 enabled libschroedinger   && require_pkg_config libschroedinger schroedinger-1.0 schroedinger/schro.h schro_init
4628 enabled libsnappy         && require libsnappy snappy-c.h snappy_compress -lsnappy
4629 enabled libspeex          && require_pkg_config libspeex speex speex/speex.h speex_decoder_init
4630 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4631 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4632 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4633 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4634 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4635 enabled libvpx            && require_pkg_config libvpx "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version &&
4636                              { enabled libvpx_vp8_decoder &&
4637                                    check_pkg_config libvpx_vp8_decoder vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx
4638                                enabled libvpx_vp8_encoder &&
4639                                    check_pkg_config libvpx_vp8_encoder vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx
4640                                enabled libvpx_vp9_decoder &&
4641                                    check_pkg_config libvpx_vp9_decoder vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx
4642                                enabled libvpx_vp9_encoder &&
4643                                    check_pkg_config libvpx_vp9_encoder vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx
4644                                disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder &&
4645                                    die "libvpx enabled but no supported decoders/encoders found"
4646                              }
4647 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4648 enabled libwebp           && require_pkg_config libwebp libwebp webp/encode.h WebPGetEncoderVersion
4649 enabled libx264           && require_pkg_config libx264 x264 "stdint.h x264.h" x264_encoder_encode &&
4650                              require_cpp_condition x264.h "X264_BUILD >= 118" &&
4651                              { check_cpp_condition x264.h "X264_MPEG2" &&
4652                                enable libx262; }
4653 enabled libx265           && require_pkg_config libx265 x265 x265.h x265_api_get &&
4654                              require_cpp_condition x265.h "X265_BUILD >= 57"
4655 enabled libxavs           && require libxavs "stdint.h xavs.h" xavs_encoder_encode -lxavs
4656 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4657 enabled mmal              && { check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4658                                { ! enabled cross_compile &&
4659                                  add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline &&
4660                                  add_ldflags -L/opt/vc/lib/ &&
4661                                  check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host; } ||
4662                                die "ERROR: mmal not found" &&
4663                                check_func_headers interface/mmal/mmal.h "MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS"; }
4664 enabled nvenc             && require_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 6"
4665 enabled omx               && require_header OMX_Core.h
4666 enabled omx_rpi           && { check_header OMX_Core.h ||
4667                                { ! enabled cross_compile && add_cflags -isystem/opt/vc/include/IL && check_header OMX_Core.h ; } ||
4668                                die "ERROR: OpenMAX IL headers not found"; } && enable omx
4669 enabled openssl           && { { check_pkg_config openssl openssl openssl/ssl.h OPENSSL_init_ssl ||
4670                                  check_pkg_config openssl openssl openssl/ssl.h SSL_library_init; } ||
4671                                check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4672                                check_lib openssl openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4673                                check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4674                                die "ERROR: openssl not found"; }
4675
4676 # SDL adds some CFLAGS that should not be part of the general CFLAGS.
4677 enabled avplay &&
4678     test_pkg_config sdl "sdl >= 1.2.1 sdl < 1.3.0" SDL_events.h SDL_PollEvent
4679
4680 ! disabled pod2man   && check_cmd pod2man --help     && enable pod2man   || disable pod2man
4681 ! disabled texi2html && check_cmd texi2html -version && enable texi2html || disable texi2html
4682
4683 check_header linux/fb.h
4684 check_header linux/videodev2.h
4685 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4686
4687 check_header AVFoundation/AVFoundation.h
4688
4689 check_header sys/videoio.h
4690
4691 check_lib user32 "windows.h winuser.h" GetShellWindow -luser32
4692 check_lib vfw32 "windows.h vfw.h" capCreateCaptureWindow -lvfw32
4693 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4694 # w32api 3.12 had it defined wrong
4695 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4696
4697 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4698 check_header "dev/bktr/ioctl_meteor.h dev/bktr/ioctl_bt848.h"                   ||
4699     check_header "machine/ioctl_meteor.h machine/ioctl_bt848.h"                 ||
4700     check_header "dev/video/meteor/ioctl_meteor.h dev/video/bktr/ioctl_bt848.h" ||
4701     check_header "dev/ic/bt8xx.h"
4702
4703 check_header sys/soundcard.h
4704
4705 enabled alsa_indev &&
4706     check_lib alsa alsa/asoundlib.h snd_pcm_htimestamp -lasound
4707
4708 enabled libjack &&
4709     require_pkg_config libjack jack jack/jack.h jack_port_get_latency_range
4710
4711 enabled sndio_indev && check_lib sndio sndio.h sio_open -lsndio
4712
4713 if enabled libcdio; then
4714     check_lib libcdio "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4715     check_lib libcdio "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4716     die "ERROR: No usable libcdio/cdparanoia found"
4717 fi
4718
4719 if enabled libxcb; then
4720     require_pkg_config libxcb xcb xcb/xcb.h xcb_connect
4721     require_pkg_config libxcb_shape xcb-shape xcb/shape.h xcb_shape_rectangles
4722     disabled libxcb_shm ||
4723         check_pkg_config libxcb_shm xcb-shm xcb/shm.h xcb_shm_attach
4724     disabled libxcb_xfixes ||
4725         check_pkg_config libxcb_xfixes xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image
4726 fi
4727
4728 # d3d11va requires linking directly to dxgi and d3d11 if not building for
4729 # the desktop api partition
4730 check_cpp <<EOF && enable uwp && d3d11va_extralibs="-ldxgi -ld3d11"
4731 #ifdef WINAPI_FAMILY
4732 #include <winapifamily.h>
4733 #if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4734 #error desktop, not uwp
4735 #else
4736 // WINAPI_FAMILY_APP, WINAPI_FAMILY_PHONE_APP => UWP
4737 #endif
4738 #else
4739 #error no family set
4740 #endif
4741 EOF
4742
4743 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4744
4745 enabled vaapi &&
4746     check_code cc "va/va.h" "vaCreateSurfaces(0, 0, 0, 0, 0, 0, 0, 0)" ||
4747     disable vaapi
4748
4749 enabled vaapi &&
4750     check_lib vaapi_drm "va/va.h va/va_drm.h" vaGetDisplayDRM -lva -lva-drm
4751
4752 enabled vaapi &&
4753     check_lib vaapi_x11 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 -lX11
4754
4755 enabled vaapi &&
4756     check_cpp_condition "va/va.h" "VA_CHECK_VERSION(1, 0, 0)" &&
4757     enable vaapi_1
4758
4759 enabled vdpau &&
4760     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4761     disable vdpau
4762
4763 enabled vdpau &&
4764     check_lib vdpau_x11 "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau -lX11
4765
4766 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4767
4768 # add some useful compiler flags if supported
4769 check_cflags -Wdeclaration-after-statement
4770 check_cflags -Wall
4771 check_cflags -Wdisabled-optimization
4772 check_cflags -Wpointer-arith
4773 check_cflags -Wredundant-decls
4774 check_cflags -Wwrite-strings
4775 check_cflags -Wtype-limits
4776 check_cflags -Wundef
4777 check_cflags -Wmissing-prototypes
4778 check_cflags -Wstrict-prototypes
4779
4780 if enabled extra_warnings; then
4781     check_cflags -Wcast-qual
4782     check_cflags -Wextra
4783     check_cflags -Wpedantic
4784 fi
4785
4786 check_disable_warning(){
4787     warning_flag=-W${1#-Wno-}
4788     test_cflags $warning_flag && add_cflags $1
4789 }
4790
4791 check_disable_warning -Wno-parentheses
4792 check_disable_warning -Wno-switch
4793 check_disable_warning -Wno-format-zero-length
4794 check_disable_warning -Wno-pointer-sign
4795
4796 check_disable_warning_headers(){
4797     warning_flag=-W${1#-Wno-}
4798     test_cflags $warning_flag && add_cflags_headers $1
4799 }
4800
4801 check_disable_warning_headers -Wno-deprecated-declarations
4802 check_disable_warning_headers -Wno-unused-variable
4803
4804 check_objcflags -fobjc-arc && enable objc_arc
4805
4806 check_cc <<EOF && enable blocks_extension
4807 void (^block)(void);
4808 EOF
4809
4810 # add some linker flags
4811 check_ldflags -Wl,--warn-common
4812 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4813 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir && add_ldsoflags -Wl,-rpath,$libdir
4814 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
4815
4816 # add some strip flags
4817 # -wN '..@*' is more selective than -x, but not available everywhere.
4818 check_stripflags -wN \'..@*\' || check_stripflags -x || strip='true'
4819
4820 enabled neon_clobber_test &&
4821     check_ldflags -Wl,--wrap,avcodec_open2              \
4822                   -Wl,--wrap,avcodec_decode_audio4      \
4823                   -Wl,--wrap,avcodec_decode_video2      \
4824                   -Wl,--wrap,avcodec_decode_subtitle2   \
4825                   -Wl,--wrap,avcodec_encode_audio2      \
4826                   -Wl,--wrap,avcodec_encode_video2      \
4827                   -Wl,--wrap,avcodec_encode_subtitle    \
4828                   -Wl,--wrap,avcodec_send_packet        \
4829                   -Wl,--wrap,avcodec_receive_packet     \
4830                   -Wl,--wrap,avcodec_send_frame         \