configure: Simplify MIPS instruction set handling
[libav.git] / configure
1 #!/bin/sh
2 #
3 # Libav configure script
4 #
5 # Copyright (c) 2000-2002 Fabrice Bellard
6 # Copyright (c) 2005-2008 Diego Biurrun
7 # Copyright (c) 2005-2008 Mans Rullgard
8 #
9
10 # Prevent locale nonsense from breaking basic text processing.
11 LC_ALL=C
12 export LC_ALL
13
14 # make sure we are running under a compatible shell
15 # try to make this part work with most shells
16
17 try_exec(){
18     echo "Trying shell $1"
19     type "$1" > /dev/null 2>&1 && exec "$@"
20 }
21
22 unset foo
23 (: ${foo%%bar}) 2> /dev/null
24 E1="$?"
25
26 (: ${foo?}) 2> /dev/null
27 E2="$?"
28
29 if test "$E1" != 0 || test "$E2" = 0; then
30     echo "Broken shell detected.  Trying alternatives."
31     export FF_CONF_EXEC
32     if test "0$FF_CONF_EXEC" -lt 1; then
33         FF_CONF_EXEC=1
34         try_exec bash "$0" "$@"
35     fi
36     if test "0$FF_CONF_EXEC" -lt 2; then
37         FF_CONF_EXEC=2
38         try_exec ksh "$0" "$@"
39     fi
40     if test "0$FF_CONF_EXEC" -lt 3; then
41         FF_CONF_EXEC=3
42         try_exec /usr/xpg4/bin/sh "$0" "$@"
43     fi
44     echo "No compatible shell script interpreter found."
45     echo "This configure script requires a POSIX-compatible shell"
46     echo "such as bash or ksh."
47     echo "THIS IS NOT A BUG IN LIBAV, DO NOT REPORT IT AS SUCH."
48     echo "Instead, install a working POSIX-compatible shell."
49     echo "Disabling this configure test will create a broken Libav."
50     if test "$BASH_VERSION" = '2.04.0(1)-release'; then
51         echo "This bash version ($BASH_VERSION) is broken on your platform."
52         echo "Upgrade to a later version if available."
53     fi
54     exit 1
55 fi
56
57 test -d /usr/xpg4/bin && PATH=/usr/xpg4/bin:$PATH
58
59 show_help(){
60     cat <<EOF
61 Usage: configure [options]
62 Options: [defaults in brackets after descriptions]
63
64 Help options:
65   --help                   print this message
66   --quiet                  Suppress showing informative output
67   --list-decoders          show all available decoders
68   --list-encoders          show all available encoders
69   --list-hwaccels          show all available hardware accelerators
70   --list-demuxers          show all available demuxers
71   --list-muxers            show all available muxers
72   --list-parsers           show all available parsers
73   --list-protocols         show all available protocols
74   --list-bsfs              show all available bitstream filters
75   --list-indevs            show all available input devices
76   --list-filters           show all available filters
77
78 Standard options:
79   --logfile=FILE           log tests and output to FILE [avbuild/config.log]
80   --disable-logging        do not log configure debug information
81   --prefix=PREFIX          install in PREFIX [$prefix_default]
82   --bindir=DIR             install binaries in DIR [PREFIX/bin]
83   --datadir=DIR            install data files in DIR [PREFIX/share/avconv]
84   --docdir=DIR             install documentation in DIR [PREFIX/share/doc/libav]
85   --libdir=DIR             install libs in DIR [PREFIX/lib]
86   --shlibdir=DIR           install shared libs in DIR [PREFIX/lib]
87   --incdir=DIR             install includes in DIR [PREFIX/include]
88   --mandir=DIR             install man page in DIR [PREFIX/share/man]
89   --enable-rpath           use rpath when linking programs (USE WITH CARE)
90
91 Licensing options:
92   --enable-gpl             allow use of GPL code, the resulting libs
93                            and binaries will be under GPL [no]
94   --enable-version3        upgrade (L)GPL to version 3 [no]
95   --enable-nonfree         allow use of nonfree code, the resulting libs
96                            and binaries will be unredistributable [no]
97
98 Configuration options:
99   --disable-static         do not build static libraries [no]
100   --enable-shared          build shared libraries [no]
101   --enable-small           optimize for size instead of speed
102   --enable-runtime-cpudetect detect CPU capabilities at runtime (bigger binary)
103   --enable-gray            enable full grayscale support (slower color)
104   --disable-swscale-alpha  disable alpha channel support in swscale
105   --disable-all            disable building components, libraries and programs
106
107 Program options:
108   --disable-programs       do not build command line programs
109   --disable-avconv         disable avconv build
110   --disable-avplay         disable avplay build
111   --disable-avprobe        disable avprobe build
112
113 Component options:
114   --disable-doc            do not build documentation
115   --disable-pod2man        do not build manual pages
116   --disable-texi2html      do not build HTML documentation
117   --disable-avdevice       disable libavdevice build
118   --disable-avcodec        disable libavcodec build
119   --disable-avformat       disable libavformat build
120   --disable-avutil         disable libavutil build
121   --disable-swscale        disable libswscale build
122   --disable-avfilter       disable video filter support [no]
123   --disable-avresample     disable libavresample build [no]
124   --disable-pthreads       disable pthreads [auto]
125   --disable-w32threads     disable Win32 threads [auto]
126   --disable-network        disable network support [no]
127   --disable-dct            disable DCT code
128   --disable-error-resilience disable error resilience code
129   --disable-lsp            disable LSP code
130   --disable-lzo            disable LZO decoder code
131   --disable-mdct           disable MDCT code
132   --disable-rdft           disable RDFT code
133   --disable-fft            disable FFT code
134   --disable-faan           disable floating point AAN (I)DCT code
135
136 Individual component options:
137   --disable-everything     disable all components listed below
138   --disable-encoder=NAME   disable encoder NAME
139   --enable-encoder=NAME    enable encoder NAME
140   --disable-encoders       disable all encoders
141   --disable-decoder=NAME   disable decoder NAME
142   --enable-decoder=NAME    enable decoder NAME
143   --disable-decoders       disable all decoders
144   --disable-hwaccel=NAME   disable hwaccel NAME
145   --enable-hwaccel=NAME    enable hwaccel NAME
146   --disable-hwaccels       disable all hwaccels
147   --disable-muxer=NAME     disable muxer NAME
148   --enable-muxer=NAME      enable muxer NAME
149   --disable-muxers         disable all muxers
150   --disable-demuxer=NAME   disable demuxer NAME
151   --enable-demuxer=NAME    enable demuxer NAME
152   --disable-demuxers       disable all demuxers
153   --enable-parser=NAME     enable parser NAME
154   --disable-parser=NAME    disable parser NAME
155   --disable-parsers        disable all parsers
156   --enable-bsf=NAME        enable bitstream filter NAME
157   --disable-bsf=NAME       disable bitstream filter NAME
158   --disable-bsfs           disable all bitstream filters
159   --enable-protocol=NAME   enable protocol NAME
160   --disable-protocol=NAME  disable protocol NAME
161   --disable-protocols      disable all protocols
162   --enable-indev=NAME      enable input device NAME
163   --disable-indev=NAME     disable input device NAME
164   --disable-indevs         disable input devices
165   --disable-devices        disable all devices
166   --enable-filter=NAME     enable filter NAME
167   --disable-filter=NAME    disable filter NAME
168   --disable-filters        disable all filters
169
170 External library support:
171
172   Using any of the following switches will allow Libav to link to the
173   corresponding external library. All the components depending on that library
174   will become enabled, if all their other dependencies are met and they are not
175   explicitly disabled. E.g. --enable-libwavpack will enable linking to
176   libwavpack and allow the libwavpack encoder to be built, unless it is
177   specifically disabled with --disable-encoder=libwavpack.
178
179   Note that only the system libraries are auto-detected. All the other external
180   libraries must be explicitly enabled.
181
182   Also note that the following help text describes the purpose of the libraries
183   themselves, not all their features will necessarily be usable by Libav.
184
185   --enable-avisynth          video frameserver
186   --enable-avxsynth          Linux version of AviSynth
187   --enable-bzlib             bzip2 compression [autodetect]
188   --enable-frei0r            video filtering plugins
189   --enable-gnutls            crypto
190   --enable-libbs2b           Bauer stereophonic-to-binaural DSP
191   --enable-libcdio           audio CD input
192   --enable-libdc1394         IEEE 1394/Firewire camera input
193   --enable-libdcadec         DCA audio decoding
194   --enable-libfaac           AAC audio encoding
195   --enable-libfdk-aac        AAC audio encoding/decoding
196   --enable-libfontconfig     font configuration and management
197   --enable-libfreetype       font rendering
198   --enable-libgsm            GSM audio encoding/decoding
199   --enable-libhdcd           HDCD decoding filter
200   --enable-libilbc           ILBC audio encoding/decoding
201   --enable-libjack           JACK audio sound server
202   --enable-libkvazaar        HEVC video encoding
203   --enable-libmp3lame        MP3 audio encoding
204   --enable-libopencore-amrnb AMR-NB audio encoding/decoding
205   --enable-libopencore-amrwb AMR-WB audio decoding
206   --enable-libopencv         computer vision
207   --enable-libopenh264       H.264 video encoding/decoding
208   --enable-libopenjpeg       JPEG 2000 image encoding/decoding
209   --enable-libopus           Opus audio encoding/decoding
210   --enable-libpulse          Pulseaudio sound server
211   --enable-librtmp           RTMP streaming
212   --enable-libschroedinger   Dirac video encoding/decoding
213   --enable-libsnappy         snappy compression
214   --enable-libspeex          Speex audio encoding/decoding
215   --enable-libtheora         Theora video encoding/decoding
216   --enable-libtwolame        MP2 audio encoding
217   --enable-libvo-aacenc      AAC audio encoding
218   --enable-libvo-amrwbenc    AMR-WB audio encoding
219   --enable-libvorbis         Vorbis audio encoding/decoding
220   --enable-libvpx            VP* video encoding/decoding
221   --enable-libwavpack        Wavpack audio encoding/decoding
222   --enable-libwebp           WebP image encoding/decoding
223   --enable-libx264           H.264 video encoding
224   --enable-libx265           HEVC video encoding
225   --enable-libxavs           Chinese AVS video encoding
226   --enable-libxcb            X window system protocol communication
227   --enable-libxcb-shm        X11 shm communication [auto]
228   --enable-libxcb-xfixes     X11 mouse rendering [auto]
229   --enable-libxvid           MPEG-4 ASP video encoding
230   --enable-openssl           crypto
231   --enable-zlib              compression [autodetect]
232
233   The following libraries provide various hardware acceleration features:
234   --enable-cuda    Nvidia CUDA (dynamically linked)
235   --enable-cuvid   Nvidia CUVID video decode acceleration
236   --enable-d3d11va Microsoft Direct3D 11 video acceleration [auto]
237   --enable-dxva2   Microsoft DirectX 9 video acceleration [auto]
238   --enable-libmfx  Intel MediaSDK (AKA Quick Sync Video)
239   --enable-libnpp  Nvidia CUDA processing
240   --enable-mmal    Broadcom Multi-Media Abstraction Layer (Raspberry Pi)
241   --enable-nvenc   Nvidia video encoding
242   --enable-omx     OpenMAX IL
243   --enable-omx-rpi OpenMAX IL for Raspberry Pi
244   --enable-vaapi   Video Acceleration API (mainly Unix/Intel)
245   --enable-vda     Apple Video Decode Acceleration [auto]
246   --enable-vdpau   Nvidia Video Decode and Presentation API for Unix [auto]
247
248 Toolchain options:
249   --arch=ARCH              select architecture [$arch]
250   --cpu=CPU                select the minimum required CPU (affects
251                            instruction selection, may crash on older CPUs)
252   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
253   --enable-cross-compile   assume a cross-compiler is used
254   --sysroot=PATH           root of cross-build tree
255   --sysinclude=PATH        location of cross-build system headers
256   --target-os=OS           compiler targets OS [$target_os]
257   --target-exec=CMD        command to run executables on target
258   --target-path=DIR        path to view of build directory on target
259   --target-samples=DIR     path to samples directory on target
260   --toolchain=NAME         set tool defaults according to NAME
261   --nm=NM                  use nm tool
262   --ar=AR                  use archive tool AR [$ar_default]
263   --as=AS                  use assembler AS [$as_default]
264   --cc=CC                  use C compiler CC [$cc_default]
265   --objcc=OCC              use ObjC compiler OCC [$cc_default]
266   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
267   --ld=LD                  use linker LD
268   --x86asmexe=X86ASM       use x86 assembler X86ASM
269   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
270   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
271   --host-cc=HOSTCC         use host C compiler HOSTCC
272   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
273   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
274   --host-ld=HOSTLD         use host linker HOSTLD
275   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
276   --host-libs=HLIBS        use libs HLIBS when linking for host
277   --host-os=OS             compiler host OS [$target_os]
278   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
279   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
280   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
281   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
282   --extra-ldsoflags=ELDFLAGS add ELDFLAGS to LDSOFLAGS [$LDSOFLAGS]
283   --extra-libs=ELIBS       add ELIBS [$ELIBS]
284   --extra-version=STRING   version string suffix []
285   --optflags=OPTFLAGS      override optimization-related compiler flags
286   --enable-pic             build position-independent code
287   --enable-thumb           compile for Thumb instruction set
288   --enable-lto             use link-time optimization
289   --env="ENV=override"     override the environment variables
290
291 Advanced options (experts only):
292   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
293   --custom-allocator=NAME  use a supported custom allocator
294   --disable-symver         disable symbol versioning
295   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
296   --disable-safe-bitstream-reader
297                            disable buffer boundary checking in bitreaders
298                            (faster, but may crash)
299   --enable-sram            allow use of on-chip SRAM
300
301 Optimization options (experts only):
302   --disable-asm            disable all assembly optimizations
303   --disable-altivec        disable AltiVec optimizations
304   --disable-vsx            disable VSX optimizations
305   --disable-power8         disable POWER8 optimizations
306   --disable-amd3dnow       disable 3DNow! optimizations
307   --disable-amd3dnowext    disable 3DNow! extended optimizations
308   --disable-mmx            disable MMX optimizations
309   --disable-mmxext         disable MMXEXT optimizations
310   --disable-sse            disable SSE optimizations
311   --disable-sse2           disable SSE2 optimizations
312   --disable-sse3           disable SSE3 optimizations
313   --disable-ssse3          disable SSSE3 optimizations
314   --disable-sse4           disable SSE4 optimizations
315   --disable-sse42          disable SSE4.2 optimizations
316   --disable-avx            disable AVX optimizations
317   --disable-xop            disable XOP optimizations
318   --disable-fma3           disable FMA3 optimizations
319   --disable-fma4           disable FMA4 optimizations
320   --disable-avx2           disable AVX2 optimizations
321   --disable-armv5te        disable armv5te optimizations
322   --disable-armv6          disable armv6 optimizations
323   --disable-armv6t2        disable armv6t2 optimizations
324   --disable-vfp            disable VFP optimizations
325   --disable-neon           disable NEON optimizations
326   --disable-inline-asm     disable use of inline assembly
327   --disable-x86asm         disable use of standalone x86 assembly
328
329 Developer options (useful when working on Libav itself):
330   --disable-debug          disable debugging symbols
331   --enable-debug=LEVEL     set the debug level [$debuglevel]
332   --disable-optimizations  disable compiler optimizations
333   --enable-extra-warnings  enable more compiler warnings
334   --samples=PATH           location of test samples for FATE, if not set use
335                            \$LIBAV_SAMPLES at make invocation time.
336   --enable-neon-clobber-test check NEON registers for clobbering (should be
337                            used only for debugging purposes)
338   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
339                            should be used only for debugging purposes)
340   --disable-valgrind-backtrace do not print a backtrace under Valgrind
341                            (only applies to --disable-optimizations builds)
342   --ignore-tests=TESTS     comma-separated list (without "fate-" prefix
343                            in the name) of tests whose result is ignored
344
345 NOTE: Object files are built at the place where configure is launched.
346 EOF
347   exit 0
348 }
349
350 quotes='""'
351
352 log(){
353     echo "$@" >> $logfile
354 }
355
356 log_file(){
357     log BEGIN $1
358     i=1
359     while read line; do
360         printf '%5s   %s\n' "${i}" "${line}"
361         i=$(($i+1))
362     done < $1 >> $logfile
363     log END $1
364 }
365
366 echolog(){
367     log "$@"
368     echo "$@"
369 }
370
371 warn(){
372     log "WARNING: $*"
373     WARNINGS="${WARNINGS}WARNING: $*\n"
374 }
375
376 die(){
377     echolog "$@"
378     cat <<EOF
379
380 If you think configure made a mistake, make sure you are using the latest
381 version from Git.  If the latest version fails, report the problem to the
382 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
383 EOF
384     if disabled logging; then
385         cat <<EOF
386 Rerun configure with logging enabled (do not use --disable-logging), and
387 include the log this produces with your report.
388 EOF
389     else
390         cat <<EOF
391 Include the log file "$logfile" produced by configure as this will help
392 solving the problem.
393 EOF
394     fi
395     exit 1
396 }
397
398 # Avoid locale weirdness, besides we really just want to translate ASCII.
399 toupper(){
400     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
401 }
402
403 tolower(){
404     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
405 }
406
407 c_escape(){
408     echo "$*" | sed 's/["\\]/\\\0/g'
409 }
410
411 sh_quote(){
412     v=$(echo "$1" | sed "s/'/'\\\\''/g")
413     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
414     echo "$v"
415 }
416
417 cleanws(){
418     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
419 }
420
421 filter(){
422     pat=$1
423     shift
424     for v; do
425         eval "case '$v' in $pat) printf '%s ' '$v' ;; esac"
426     done
427 }
428
429 filter_out(){
430     pat=$1
431     shift
432     for v; do
433         eval "case '$v' in $pat) ;; *) printf '%s ' '$v' ;; esac"
434     done
435 }
436
437 map(){
438     m=$1
439     shift
440     for v; do eval $m; done
441 }
442
443 add_suffix(){
444     suffix=$1
445     shift
446     for v; do echo ${v}${suffix}; done
447 }
448
449 set_all(){
450     value=$1
451     shift
452     for var in $*; do
453         eval $var=$value
454     done
455 }
456
457 set_weak(){
458     value=$1
459     shift
460     for var; do
461         eval : \${$var:=$value}
462     done
463 }
464
465 sanitize_var_name(){
466     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
467 }
468
469 set_sanitized(){
470     var=$1
471     shift
472     eval $(sanitize_var_name "$var")='$*'
473 }
474
475 get_sanitized(){
476     eval echo \$$(sanitize_var_name "$1")
477 }
478
479 pushvar(){
480     for pvar in $*; do
481         eval level=\${${pvar}_level:=0}
482         eval ${pvar}_${level}="\$$pvar"
483         eval ${pvar}_level=$(($level+1))
484     done
485 }
486
487 popvar(){
488     for pvar in $*; do
489         eval level=\${${pvar}_level:-0}
490         test $level = 0 && continue
491         eval level=$(($level-1))
492         eval $pvar="\${${pvar}_${level}}"
493         eval ${pvar}_level=$level
494         eval unset ${pvar}_${level}
495     done
496 }
497
498 enable(){
499     set_all yes $*
500 }
501
502 disable(){
503     set_all no $*
504 }
505
506 enable_weak(){
507     set_weak yes $*
508 }
509
510 disable_weak(){
511     set_weak no $*
512 }
513
514 enable_sanitized(){
515     for var; do
516         enable $(sanitize_var_name $var)
517     done
518 }
519
520 disable_sanitized(){
521     for var; do
522         disable $(sanitize_var_name $var)
523     done
524 }
525
526 do_enable_deep(){
527     for var; do
528         enabled $var && continue
529         eval sel="\$${var}_select"
530         eval sgs="\$${var}_suggest"
531         pushvar var sgs
532         enable_deep $sel
533         popvar sgs
534         enable_deep_weak $sgs
535         popvar var
536     done
537 }
538
539 enable_deep(){
540     do_enable_deep $*
541     enable $*
542 }
543
544 enable_deep_weak(){
545     for var; do
546         disabled $var && continue
547         pushvar var
548         do_enable_deep $var
549         popvar var
550         enable_weak $var
551     done
552 }
553
554 enabled(){
555     test "${1#!}" = "$1" && op="=" || op="!="
556     eval test "x\$${1#!}" $op "xyes"
557 }
558
559 disabled(){
560     test "${1#!}" = "$1" && op="=" || op="!="
561     eval test "x\$${1#!}" $op "xno"
562 }
563
564 enabled_all(){
565     for opt; do
566         enabled $opt || return 1
567     done
568 }
569
570 disabled_all(){
571     for opt; do
572         disabled $opt || return 1
573     done
574 }
575
576 enabled_any(){
577     for opt; do
578         enabled $opt && return 0
579     done
580 }
581
582 disabled_any(){
583     for opt; do
584         disabled $opt && return 0
585     done
586     return 1
587 }
588
589 set_default(){
590     for opt; do
591         eval : \${$opt:=\$${opt}_default}
592     done
593 }
594
595 is_in(){
596     value=$1
597     shift
598     for var in $*; do
599         [ $var = $value ] && return 0
600     done
601     return 1
602 }
603
604 check_deps(){
605     for cfg; do
606         enabled ${cfg}_checking && die "Circular dependency for $cfg."
607         disabled ${cfg}_checking && continue
608         enable ${cfg}_checking
609
610         eval dep_all="\$${cfg}_deps"
611         eval dep_any="\$${cfg}_deps_any"
612         eval dep_con="\$${cfg}_conflict"
613         eval dep_sel="\$${cfg}_select"
614         eval dep_sgs="\$${cfg}_suggest"
615         eval dep_ifa="\$${cfg}_if"
616         eval dep_ifn="\$${cfg}_if_any"
617
618         pushvar cfg dep_all dep_any dep_con dep_sel dep_sgs dep_ifa dep_ifn
619         check_deps $dep_all $dep_any $dep_con $dep_sel $dep_sgs $dep_ifa $dep_ifn
620         popvar cfg dep_all dep_any dep_con dep_sel dep_sgs dep_ifa dep_ifn
621
622         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
623         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
624         enabled_all  $dep_all || disable $cfg
625         enabled_any  $dep_any || disable $cfg
626         disabled_all $dep_con || disable $cfg
627         disabled_any $dep_sel && disable $cfg
628
629         enabled $cfg && enable_deep_weak $dep_sel $dep_sgs
630
631         for dep in $dep_all $dep_any $dep_sel $dep_sgs; do
632             # filter out library deps, these do not belong in extralibs
633             is_in $dep $LIBRARY_LIST && continue
634             enabled $dep && eval append ${cfg}_extralibs ${dep}_extralibs
635         done
636
637         disable ${cfg}_checking
638     done
639 }
640
641 print_config(){
642     pfx=$1
643     files=$2
644     shift 2
645     map 'eval echo "$v \${$v:-no}"' "$@" |
646     awk "BEGIN { split(\"$files\", files) }
647         {
648             c = \"$pfx\" toupper(\$1);
649             v = \$2;
650             sub(/yes/, 1, v);
651             sub(/no/,  0, v);
652             for (f in files) {
653                 file = files[f];
654                 if (file ~ /\\.h\$/) {
655                     printf(\"#define %s %d\\n\", c, v) >>file;
656                 } else if (file ~ /\\.asm\$/) {
657                     printf(\"%%define %s %d\\n\", c, v) >>file;
658                 } else if (file ~ /\\.mak\$/) {
659                     n = -v ? \"\" : \"!\";
660                     printf(\"%s%s=yes\\n\", n, c) >>file;
661                 }
662             }
663         }"
664 }
665
666 print_enabled(){
667     suf=$1
668     shift
669     for v; do
670         enabled $v && printf "%s\n" ${v%$suf}
671     done
672 }
673
674 append(){
675     var=$1
676     shift
677     eval "$var=\"\$$var $*\""
678 }
679
680 prepend(){
681     var=$1
682     shift
683     eval "$var=\"$* \$$var\""
684 }
685
686 unique(){
687     var=$1
688     uniq_list=""
689     for tok in $(eval echo \$$var); do
690         uniq_list="$(filter_out $tok $uniq_list) $tok"
691     done
692     eval "$var=\"${uniq_list}\""
693 }
694
695 resolve(){
696     var=$1
697     tmpvar=
698     for entry in $(eval echo \$$var); do
699         tmpvar="$tmpvar $(eval echo \$${entry})"
700     done
701     eval "$var=\"${tmpvar}\""
702 }
703
704 add_cppflags(){
705     append CPPFLAGS "$@"
706 }
707
708 add_cflags(){
709     append CFLAGS $($cflags_filter "$@")
710 }
711
712 add_cflags_headers(){
713     append CFLAGS_HEADERS $($cflags_filter "$@")
714 }
715
716 add_asflags(){
717     append ASFLAGS $($asflags_filter "$@")
718 }
719
720 add_objcflags(){
721     append OBJCFLAGS $($objcflags_filter "$@")
722 }
723
724 add_ldflags(){
725     append LDFLAGS $($ldflags_filter "$@")
726 }
727
728 add_ldexeflags(){
729     append LDEXEFLAGS $($ldflags_filter "$@")
730 }
731
732 add_ldsoflags(){
733     append LDSOFLAGS $($ldflags_filter "$@")
734 }
735
736 add_stripflags(){
737     append STRIPFLAGS "$@"
738 }
739
740 add_extralibs(){
741     prepend extralibs $($ldflags_filter "$@")
742 }
743
744 add_host_cppflags(){
745     append host_cppflags "$@"
746 }
747
748 add_host_cflags(){
749     append host_cflags $($host_cflags_filter "$@")
750 }
751
752 add_host_ldflags(){
753     append host_ldflags $($host_ldflags_filter "$@")
754 }
755
756 add_compat(){
757     append compat_objs $1
758     shift
759     map 'add_cppflags -D$v' "$@"
760 }
761
762 check_cmd(){
763     log "$@"
764     "$@" >> $logfile 2>&1
765 }
766
767 cc_o(){
768     eval printf '%s\\n' $CC_O
769 }
770
771 cc_e(){
772     eval printf '%s\\n' $CC_E
773 }
774
775 check_cc(){
776     log check_cc "$@"
777     cat > $TMPC
778     log_file $TMPC
779     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
780 }
781
782 check_objcc(){
783     log check_objcc "$@"
784     cat > $TMPC
785     log_file $TMPC
786     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
787 }
788
789 check_cpp(){
790     log check_cpp "$@"
791     cat > $TMPC
792     log_file $TMPC
793     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
794 }
795
796 as_o(){
797     eval printf '%s\\n' $AS_O
798 }
799
800 check_as(){
801     log check_as "$@"
802     cat > $TMPS
803     log_file $TMPS
804     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
805 }
806
807 check_inline_asm(){
808     log check_inline_asm "$@"
809     name="$1"
810     code="$2"
811     shift 2
812     disable $name
813     check_cc "$@" <<EOF && enable $name
814 void foo(void){ __asm__ volatile($code); }
815 EOF
816 }
817
818 check_insn(){
819     log check_insn "$@"
820     check_inline_asm ${1}_inline "\"$2\""
821     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
822 }
823
824 check_x86asm(){
825     log check_x86asm "$@"
826     echo "$1" > $TMPS
827     log_file $TMPS
828     shift 1
829     check_cmd $x86asmexe $X86ASMFLAGS "$@" -o $TMPO $TMPS
830 }
831
832 ld_o(){
833     eval printf '%s\\n' $LD_O
834 }
835
836 check_ld(){
837     log check_ld "$@"
838     flags=$(filter_out '-l*' "$@")
839     libs=$(filter '-l*' "$@")
840     check_cc $($cflags_filter $flags) || return
841     flags=$($ldflags_filter $flags)
842     libs=$($ldflags_filter $libs)
843     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
844 }
845
846 print_include(){
847     hdr=$1
848     test "${hdr%.h}" = "${hdr}" &&
849         echo "#include $hdr"    ||
850         echo "#include <$hdr>"
851 }
852
853 check_code(){
854     log check_code "$@"
855     check=$1
856     headers=$2
857     code=$3
858     shift 3
859     {
860         for hdr in $headers; do
861             print_include $hdr
862         done
863         echo "int main(void) { $code; return 0; }"
864     } | check_$check "$@"
865 }
866
867 check_cppflags(){
868     log check_cppflags "$@"
869     check_cpp "$@" <<EOF && append CPPFLAGS "$@"
870 #include <stdlib.h>;
871 EOF
872 }
873
874 test_cflags(){
875     log test_cflags "$@"
876     set -- $($cflags_filter "$@")
877     check_cc "$@" <<EOF
878 int x;
879 EOF
880 }
881
882 check_cflags(){
883     log check_cflags "$@"
884     test_cflags "$@" && add_cflags "$@"
885 }
886
887 test_objcflags(){
888     log test_objcflags "$@"
889     set -- $($objcflags_filter "$@")
890     check_objcc "$@" <<EOF
891 int x;
892 EOF
893 }
894
895 check_objcflags(){
896     log check_objcflags "$@"
897     test_objcflags "$@" && add_objcflags "$@"
898 }
899
900 test_ldflags(){
901     log test_ldflags "$@"
902     set -- $($ldflags_filter "$@")
903     check_ld "$@" <<EOF
904 int main(void){ return 0; }
905 EOF
906 }
907
908 check_ldflags(){
909     log check_ldflags "$@"
910     test_ldflags "$@" && add_ldflags "$@"
911 }
912
913 test_stripflags(){
914     log test_stripflags "$@"
915     # call check_cc to get a fresh TMPO
916     check_cc <<EOF
917 int main(void) { return 0; }
918 EOF
919     check_cmd $strip $STRIPFLAGS "$@" $TMPO
920 }
921
922 check_stripflags(){
923     log check_stripflags "$@"
924     test_stripflags "$@" && add_stripflags "$@"
925 }
926
927 check_header(){
928     log check_header "$@"
929     headers=$1
930     shift
931     disable_sanitized $headers
932     {
933         for hdr in $headers; do
934             print_include $hdr
935         done
936         echo "int x;"
937     } | check_cpp "$@" && enable_sanitized $headers
938 }
939
940 check_func(){
941     log check_func "$@"
942     func=$1
943     shift
944     disable $func
945     check_ld "$@" <<EOF && enable $func
946 extern int $func();
947 int main(void){ $func(); }
948 EOF
949 }
950
951 check_mathfunc(){
952     log check_mathfunc "$@"
953     func=$1
954     narg=$2
955     shift 2
956     test $narg = 2 && args="f, g" || args="f"
957     disable $func
958     check_ld "$@" <<EOF && enable $func
959 #include <math.h>
960 float foo(float f, float g) { return $func($args); }
961 int main(void){ return 0; }
962 EOF
963 }
964
965 check_func_headers(){
966     log check_func_headers "$@"
967     headers=$1
968     funcs=$2
969     shift 2
970     {
971         for hdr in $headers; do
972             print_include $hdr
973         done
974         for func in $funcs; do
975             echo "long check_$func(void) { return (long) $func; }"
976         done
977         echo "int main(void) { return 0; }"
978     } | check_ld "$@" && enable $funcs && enable_sanitized $headers
979 }
980
981 check_cpp_condition(){
982     log check_cpp_condition "$@"
983     header=$1
984     condition=$2
985     shift 2
986     check_cpp "$@" <<EOF
987 #include <$header>
988 #if !($condition)
989 #error "unsatisfied condition: $condition"
990 #endif
991 EOF
992 }
993
994 test_cflags_cpp(){
995     log test_cflags_cpp "$@"
996     flags=$1
997     condition=$2
998     shift 2
999     set -- $($cflags_filter "$flags")
1000     check_cpp "$@" <<EOF
1001 #if !($condition)
1002 #error "unsatisfied condition: $condition"
1003 #endif
1004 EOF
1005 }
1006
1007 check_lib(){
1008     log check_lib "$@"
1009     name="$1"
1010     headers="$2"
1011     funcs="$3"
1012     shift 3
1013     disable $name
1014     check_func_headers "$headers" "$funcs" "$@" &&
1015         enable $name && eval ${name}_extralibs="\$@"
1016 }
1017
1018 test_pkg_config(){
1019     log test_pkg_config "$@"
1020     name="$1"
1021     pkg_version="$2"
1022     pkg="${2%% *}"
1023     headers="$3"
1024     funcs="$4"
1025     shift 4
1026     disable $name
1027     check_cmd $pkg_config --exists --print-errors $pkg_version || return
1028     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1029     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1030     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1031         enable $name &&
1032         set_sanitized "${name}_cflags"    $pkg_cflags &&
1033         set_sanitized "${name}_extralibs" $pkg_libs
1034 }
1035
1036 check_pkg_config(){
1037     log check_pkg_config "$@"
1038     name="$1"
1039     test_pkg_config "$@" &&
1040         eval add_cflags \$${name}_cflags
1041 }
1042
1043 check_exec(){
1044     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1045 }
1046
1047 check_exec_crash(){
1048     log check_exec_crash "$@"
1049     code=$(cat)
1050
1051     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1052     # are safe but may not be available everywhere.  Thus we use
1053     # raise(SIGTERM) instead.  The check is run in a subshell so we
1054     # can redirect the "Terminated" message from the shell.  SIGBUS
1055     # is not defined by standard C so it is used conditionally.
1056
1057     (check_exec "$@") >> $logfile 2>&1 <<EOF
1058 #include <signal.h>
1059 static void sighandler(int sig){
1060     raise(SIGTERM);
1061 }
1062 int foo(void){
1063     $code
1064 }
1065 int (*func_ptr)(void) = foo;
1066 int main(void){
1067     signal(SIGILL, sighandler);
1068     signal(SIGFPE, sighandler);
1069     signal(SIGSEGV, sighandler);
1070 #ifdef SIGBUS
1071     signal(SIGBUS, sighandler);
1072 #endif
1073     return func_ptr();
1074 }
1075 EOF
1076 }
1077
1078 check_type(){
1079     log check_type "$@"
1080     headers=$1
1081     type=$2
1082     shift 2
1083     disable_sanitized "$type"
1084     check_code cc "$headers" "$type v" "$@" && enable_sanitized "$type"
1085 }
1086
1087 check_struct(){
1088     log check_struct "$@"
1089     headers=$1
1090     struct=$2
1091     member=$3
1092     shift 3
1093     disable_sanitized "${struct}_${member}"
1094     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1095         enable_sanitized "${struct}_${member}"
1096 }
1097
1098 check_builtin(){
1099     log check_builtin "$@"
1100     name=$1
1101     headers=$2
1102     builtin=$3
1103     shift 3
1104     disable "$name"
1105     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1106 }
1107
1108 check_compile_assert(){
1109     log check_compile_assert "$@"
1110     name=$1
1111     headers=$2
1112     condition=$3
1113     shift 3
1114     disable "$name"
1115     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1116 }
1117
1118 require(){
1119     log require "$@"
1120     name_version="$1"
1121     name="${1%% *}"
1122     headers="$2"
1123     func="$3"
1124     shift 3
1125     check_lib $name "$headers" $func "$@" || die "ERROR: $name_version not found"
1126 }
1127
1128 require_header(){
1129     log require_header "$@"
1130     headers="$1"
1131     shift
1132     check_header "$headers" "$@" || die "ERROR: $headers not found"
1133 }
1134
1135 require_cpp_condition(){
1136     log require_cpp_condition "$@"
1137     header="$1"
1138     condition="$2"
1139     shift 2
1140     check_cpp_condition "$header" "$condition" "$@" || die "ERROR: $condition not satisfied"
1141 }
1142
1143 require_pkg_config(){
1144     log require_pkg_config "$@"
1145     pkg_version="$2"
1146     check_pkg_config "$@" || die "ERROR: $pkg_version not found"
1147 }
1148
1149 hostcc_e(){
1150     eval printf '%s\\n' $HOSTCC_E
1151 }
1152
1153 hostcc_o(){
1154     eval printf '%s\\n' $HOSTCC_O
1155 }
1156
1157 check_host_cc(){
1158     log check_host_cc "$@"
1159     cat > $TMPC
1160     log_file $TMPC
1161     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1162 }
1163
1164 check_host_cpp(){
1165     log check_host_cpp "$@"
1166     cat > $TMPC
1167     log_file $TMPC
1168     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1169 }
1170
1171 check_host_cppflags(){
1172     log check_host_cppflags "$@"
1173     check_host_cpp "$@" <<EOF && append host_cppflags "$@"
1174 #include <stdlib.h>;
1175 EOF
1176 }
1177
1178 check_host_cflags(){
1179     log check_host_cflags "$@"
1180     set -- $($host_cflags_filter "$@")
1181     check_host_cc "$@" <<EOF && append host_cflags "$@"
1182 int x;
1183 EOF
1184 }
1185
1186 check_host_cpp_condition(){
1187     log check_host_cpp_condition "$@"
1188     header=$1
1189     condition=$2
1190     shift 2
1191     check_host_cpp "$@" <<EOF
1192 #include <$header>
1193 #if !($condition)
1194 #error "unsatisfied condition: $condition"
1195 #endif
1196 EOF
1197 }
1198
1199 cp_if_changed(){
1200     cmp -s "$1" "$2" && { test "$quiet" != "yes" && echo "$2 is unchanged"; } && return
1201     mkdir -p "$(dirname $2)"
1202     cp -f "$1" "$2"
1203 }
1204
1205 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1206 # system-dependent things.
1207
1208 AVCODEC_COMPONENTS="
1209     bsfs
1210     decoders
1211     encoders
1212     hwaccels
1213     parsers
1214 "
1215
1216 AVDEVICE_COMPONENTS="
1217     indevs
1218 "
1219 AVFILTER_COMPONENTS="
1220     filters
1221 "
1222 AVFORMAT_COMPONENTS="
1223     demuxers
1224     muxers
1225     protocols
1226 "
1227
1228 COMPONENT_LIST="
1229     $AVCODEC_COMPONENTS
1230     $AVDEVICE_COMPONENTS
1231     $AVFILTER_COMPONENTS
1232     $AVFORMAT_COMPONENTS
1233 "
1234
1235 EXAMPLE_LIST="
1236     decode_audio_example
1237     decode_video_example
1238     encode_audio_example
1239     encode_video_example
1240     filter_audio_example
1241     metadata_example
1242     output_example
1243     qsvdec_example
1244     transcode_aac_example
1245 "
1246
1247 # catchall list of things that require external libs to link
1248 EXTRALIBS_LIST="
1249     cpu_init
1250     cws2fws
1251 "
1252
1253 HWACCEL_LIBRARY_NONFREE_LIST="
1254     cuda
1255     cuvid
1256     libnpp
1257 "
1258 HWACCEL_LIBRARY_LIST="
1259     $HWACCEL_LIBRARY_NONFREE_LIST
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_mmal_hwaccel_deps="mmal"
2189 h264_qsv_hwaccel_deps="libmfx"
2190 h264_vaapi_hwaccel_deps="vaapi"
2191 h264_vaapi_hwaccel_select="h264_decoder"
2192 h264_vda_hwaccel_deps="vda"
2193 h264_vda_hwaccel_select="h264_decoder"
2194 h264_vda_old_hwaccel_deps="vda"
2195 h264_vda_old_hwaccel_select="h264_decoder"
2196 h264_vdpau_hwaccel_deps="vdpau"
2197 h264_vdpau_hwaccel_select="h264_decoder"
2198 hevc_cuvid_hwaccel_deps="cuvid CUVIDHEVCPICPARAMS"
2199 hevc_cuvid_hwaccel_select="hevc_decoder"
2200 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2201 hevc_d3d11va_hwaccel_select="hevc_decoder"
2202 hevc_d3d11va2_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2203 hevc_d3d11va2_hwaccel_select="hevc_decoder"
2204 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2205 hevc_dxva2_hwaccel_select="hevc_decoder"
2206 hevc_qsv_hwaccel_deps="libmfx"
2207 hevc_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferHEVC"
2208 hevc_vaapi_hwaccel_select="hevc_decoder"
2209 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2210 hevc_vdpau_hwaccel_select="hevc_decoder"
2211 mpeg1_vdpau_hwaccel_deps="vdpau"
2212 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2213 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2214 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2215 mpeg2_d3d11va2_hwaccel_deps="d3d11va"
2216 mpeg2_d3d11va2_hwaccel_select="mpeg2video_decoder"
2217 mpeg2_dxva2_hwaccel_deps="dxva2"
2218 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2219 mpeg2_mmal_hwaccel_deps="mmal"
2220 mpeg2_qsv_hwaccel_deps="libmfx"
2221 mpeg2_vaapi_hwaccel_deps="vaapi"
2222 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2223 mpeg2_vdpau_hwaccel_deps="vdpau"
2224 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2225 mpeg4_vaapi_hwaccel_deps="vaapi"
2226 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2227 mpeg4_vdpau_hwaccel_deps="vdpau"
2228 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2229 vc1_d3d11va_hwaccel_deps="d3d11va"
2230 vc1_d3d11va_hwaccel_select="vc1_decoder"
2231 vc1_d3d11va2_hwaccel_deps="d3d11va"
2232 vc1_d3d11va2_hwaccel_select="vc1_decoder"
2233 vc1_dxva2_hwaccel_deps="dxva2"
2234 vc1_dxva2_hwaccel_select="vc1_decoder"
2235 vc1_mmal_hwaccel_deps="mmal"
2236 vc1_qsv_hwaccel_deps="libmfx"
2237 vc1_vaapi_hwaccel_deps="vaapi"
2238 vc1_vaapi_hwaccel_select="vc1_decoder"
2239 vc1_vdpau_hwaccel_deps="vdpau"
2240 vc1_vdpau_hwaccel_select="vc1_decoder"
2241 vp8_qsv_hwaccel_deps="libmfx"
2242 vp8_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferVP8"
2243 vp8_vaapi_hwaccel_select="vp8_decoder"
2244 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2245 wmv3_d3d11va2_hwaccel_select="vc1_d3d11va2_hwaccel"
2246 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2247 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2248 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2249
2250 # hardware-accelerated codecs
2251 nvenc_deps_any="libdl LoadLibrary"
2252 omx_deps="libdl pthreads"
2253 omx_rpi_select="omx"
2254 qsv_deps="libmfx"
2255 qsvdec_select="qsv"
2256 qsvenc_select="qsv"
2257 qsvvpp_select="qsv"
2258 vaapi_encode_deps="vaapi"
2259
2260 hwupload_cuda_filter_deps="cuda"
2261 scale_npp_filter_deps="cuda libnpp"
2262
2263 h264_mmal_decoder_deps="mmal"
2264 h264_nvenc_encoder_deps="nvenc"
2265 h264_omx_encoder_deps="omx"
2266 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
2267 h264_qsv_encoder_select="qsvenc"
2268 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
2269 h264_vaapi_encoder_select="cbs_h264 vaapi_encode"
2270 hevc_nvenc_encoder_deps="nvenc"
2271 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser hevc_qsv_hwaccel qsvdec"
2272 hevc_qsv_encoder_select="hevcparse qsvenc"
2273 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
2274 hevc_vaapi_encoder_select="cbs_h265 vaapi_encode"
2275 mjpeg_qsv_encoder_deps="libmfx"
2276 mjpeg_qsv_encoder_select="qsvenc"
2277 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
2278 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
2279 mpeg2_mmal_decoder_deps="mmal"
2280 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2281 mpeg2_qsv_encoder_select="qsvenc"
2282 mpeg2_vaapi_encoder_deps="VAEncPictureParameterBufferMPEG2"
2283 mpeg2_vaapi_encoder_select="cbs_mpeg2 vaapi_encode"
2284 mpeg4_omx_encoder_deps="omx"
2285 vc1_mmal_decoder_deps="mmal"
2286 vc1_qsv_decoder_select="qsvdec vc1_qsv_hwaccel vc1_parser"
2287 vp8_qsv_decoder_select="qsvdec vp8_qsv_hwaccel vp8_parser"
2288 vp8_vaapi_encoder_deps="VAEncPictureParameterBufferVP8"
2289 vp8_vaapi_encoder_select="vaapi_encode"
2290 vp9_vaapi_encoder_deps="VAEncPictureParameterBufferVP9"
2291 vp9_vaapi_encoder_select="vaapi_encode"
2292
2293 nvenc_h264_encoder_select="h264_nvenc_encoder"
2294 nvenc_hevc_encoder_select="hevc_nvenc_encoder"
2295
2296 # parsers
2297 aac_parser_select="adts_header"
2298 h264_parser_select="golomb h264dsp h264parse"
2299 hevc_parser_select="hevcparse"
2300 mpegaudio_parser_select="mpegaudioheader"
2301 mpegvideo_parser_select="mpegvideo"
2302 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2303 vc1_parser_select="vc1dsp"
2304
2305 # bitstream_filters
2306 aac_adtstoasc_bsf_select="adts_header"
2307 h264_metadata_bsf_select="cbs_h264"
2308 h264_redundant_pps_bsf_select="cbs_h264"
2309 hevc_metadata_bsf_select="cbs_h265"
2310 mjpeg2jpeg_bsf_select="jpegtables"
2311 mpeg2_metadata_bsf_select="cbs_mpeg2"
2312 trace_headers_bsf_select="cbs_h264 cbs_h265 cbs_mpeg2"
2313
2314 # external libraries
2315 avisynth_deps="LoadLibrary"
2316 avxsynth_deps="libdl"
2317 avisynth_demuxer_deps_any="avisynth avxsynth"
2318 avisynth_demuxer_select="riffdec"
2319 libdcadec_decoder_deps="libdcadec"
2320 libfaac_encoder_deps="libfaac"
2321 libfaac_encoder_select="audio_frame_queue"
2322 libfdk_aac_decoder_deps="libfdk_aac"
2323 libfdk_aac_encoder_deps="libfdk_aac"
2324 libfdk_aac_encoder_select="audio_frame_queue"
2325 libgsm_decoder_deps="libgsm"
2326 libgsm_encoder_deps="libgsm"
2327 libgsm_ms_decoder_deps="libgsm"
2328 libgsm_ms_encoder_deps="libgsm"
2329 libilbc_decoder_deps="libilbc"
2330 libilbc_encoder_deps="libilbc"
2331 libkvazaar_encoder_deps="libkvazaar"
2332 libmp3lame_encoder_deps="libmp3lame"
2333 libmp3lame_encoder_select="audio_frame_queue mpegaudioheader"
2334 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2335 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2336 libopencore_amrnb_encoder_select="audio_frame_queue"
2337 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2338 libopenh264_decoder_deps="libopenh264"
2339 libopenh264_decoder_select="h264_mp4toannexb_bsf"
2340 libopenh264_encoder_deps="libopenh264"
2341 libopenjpeg_decoder_deps="libopenjpeg"
2342 libopenjpeg_encoder_deps="libopenjpeg"
2343 libopus_decoder_deps="libopus"
2344 libopus_encoder_deps="libopus"
2345 libopus_encoder_select="audio_frame_queue"
2346 libschroedinger_decoder_deps="libschroedinger"
2347 libschroedinger_encoder_deps="libschroedinger"
2348 libspeex_decoder_deps="libspeex"
2349 libspeex_encoder_deps="libspeex"
2350 libspeex_encoder_select="audio_frame_queue"
2351 libtheora_encoder_deps="libtheora"
2352 libtwolame_encoder_deps="libtwolame"
2353 libvo_aacenc_encoder_deps="libvo_aacenc"
2354 libvo_aacenc_encoder_select="audio_frame_queue"
2355 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2356 libvorbis_encoder_deps="libvorbis"
2357 libvorbis_encoder_select="audio_frame_queue"
2358 libvpx_vp8_decoder_deps="libvpx"
2359 libvpx_vp8_encoder_deps="libvpx"
2360 libvpx_vp9_decoder_deps="libvpx"
2361 libvpx_vp9_encoder_deps="libvpx"
2362 libwavpack_encoder_deps="libwavpack"
2363 libwavpack_encoder_select="audio_frame_queue"
2364 libwebp_encoder_deps="libwebp"
2365 libx262_encoder_deps="libx262"
2366 libx264_encoder_deps="libx264"
2367 libx265_encoder_deps="libx265"
2368 libxavs_encoder_deps="libxavs"
2369 libxvid_encoder_deps="libxvid mkstemp"
2370
2371 # demuxers / muxers
2372 ac3_demuxer_select="ac3_parser"
2373 asf_demuxer_select="riffdec"
2374 asf_muxer_select="riffenc"
2375 asf_stream_muxer_select="asf_muxer"
2376 avi_demuxer_select="iso_media riffdec"
2377 avi_muxer_select="riffenc"
2378 caf_demuxer_select="iso_media riffdec"
2379 dash_muxer_select="mp4_muxer"
2380 dirac_demuxer_select="dirac_parser"
2381 dv_demuxer_select="dvprofile"
2382 dv_muxer_select="dvprofile"
2383 dxa_demuxer_select="riffdec"
2384 eac3_demuxer_select="ac3_parser"
2385 f4v_muxer_select="mov_muxer"
2386 flac_demuxer_select="flac_parser"
2387 hds_muxer_select="flv_muxer"
2388 hls_muxer_select="mpegts_muxer"
2389 ipod_muxer_select="mov_muxer"
2390 ismv_muxer_select="mov_muxer"
2391 matroska_audio_muxer_select="matroska_muxer"
2392 matroska_demuxer_select="iso_media riffdec"
2393 matroska_demuxer_suggest="bzlib lzo zlib"
2394 matroska_muxer_select="iso_media riffenc"
2395 mmf_muxer_select="riffenc"
2396 mov_demuxer_select="iso_media riffdec"
2397 mov_demuxer_suggest="zlib"
2398 mov_muxer_select="iso_media riffenc rtpenc_chain"
2399 mp3_demuxer_select="mpegaudio_parser"
2400 mp3_muxer_select="mpegaudioheader"
2401 mp4_muxer_select="mov_muxer"
2402 mpegts_demuxer_select="iso_media"
2403 mpegts_muxer_select="adts_muxer latm_muxer"
2404 mpegtsraw_demuxer_select="mpegts_demuxer"
2405 mxf_d10_muxer_select="mxf_muxer"
2406 nut_muxer_select="riffenc"
2407 nuv_demuxer_select="riffdec"
2408 oga_muxer_select="ogg_muxer"
2409 ogg_demuxer_select="dirac_parse"
2410 opus_muxer_select="ogg_muxer"
2411 psp_muxer_select="mov_muxer"
2412 rtp_demuxer_select="sdp_demuxer"
2413 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2414 rtsp_demuxer_select="http_protocol rtpdec"
2415 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2416 sap_demuxer_select="sdp_demuxer"
2417 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2418 sdp_demuxer_select="rtpdec"
2419 smoothstreaming_muxer_select="ismv_muxer"
2420 spdif_demuxer_select="adts_header"
2421 spdif_muxer_select="adts_header"
2422 spx_muxer_select="ogg_muxer"
2423 swf_demuxer_suggest="zlib"
2424 tak_demuxer_select="tak_parser"
2425 tg2_muxer_select="mov_muxer"
2426 tgp_muxer_select="mov_muxer"
2427 w64_demuxer_select="wav_demuxer"
2428 wav_demuxer_select="riffdec"
2429 wav_muxer_select="riffenc"
2430 webm_muxer_select="iso_media riffenc"
2431 wtv_demuxer_select="mpegts_demuxer riffdec"
2432 xmv_demuxer_select="riffdec"
2433 xwma_demuxer_select="riffdec"
2434
2435 # indevs
2436 alsa_indev_deps="alsa"
2437 avfoundation_indev_deps="AVFoundation_AVFoundation_h objc_arc pthreads"
2438 avfoundation_indev_extralibs="-framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia"
2439 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2440 fbdev_indev_deps="linux_fb_h"
2441 jack_indev_deps="libjack"
2442 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
2443 libcdio_indev_deps="libcdio"
2444 libdc1394_indev_deps="libdc1394"
2445 oss_indev_deps_any="sys_soundcard_h"
2446 pulse_indev_deps="libpulse"
2447 sndio_indev_deps="sndio"
2448 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2449 vfwcap_indev_deps="vfw32 vfwcap_defines"
2450 xcbgrab_indev_deps="libxcb libxcb_shape"
2451 xcbgrab_indev_suggest="libxcb_shm libxcb_xfixes"
2452
2453 # protocols
2454 ffrtmpcrypt_protocol_conflict="librtmp_protocol"
2455 ffrtmpcrypt_protocol_deps_any="gmp openssl"
2456 ffrtmpcrypt_protocol_select="tcp_protocol"
2457 ffrtmphttp_protocol_conflict="librtmp_protocol"
2458 ffrtmphttp_protocol_select="http_protocol"
2459 gopher_protocol_select="network"
2460 http_protocol_select="tcp_protocol"
2461 http_protocol_suggest="zlib"
2462 httpproxy_protocol_select="tcp_protocol"
2463 httpproxy_protocol_suggest="zlib"
2464 https_protocol_select="tls_protocol"
2465 https_protocol_suggest="zlib"
2466 icecast_protocol_select="http_protocol"
2467 librtmp_protocol_deps="librtmp"
2468 librtmpe_protocol_deps="librtmp"
2469 librtmps_protocol_deps="librtmp"
2470 librtmpt_protocol_deps="librtmp"
2471 librtmpte_protocol_deps="librtmp"
2472 mmsh_protocol_select="http_protocol"
2473 mmst_protocol_select="network"
2474 rtmp_protocol_conflict="librtmp_protocol"
2475 rtmp_protocol_select="tcp_protocol"
2476 rtmp_protocol_suggest="zlib"
2477 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2478 rtmpe_protocol_suggest="zlib"
2479 rtmps_protocol_conflict="librtmp_protocol"
2480 rtmps_protocol_select="tls_protocol"
2481 rtmps_protocol_suggest="zlib"
2482 rtmpt_protocol_select="ffrtmphttp_protocol"
2483 rtmpt_protocol_suggest="zlib"
2484 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2485 rtmpte_protocol_suggest="zlib"
2486 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2487 rtmpts_protocol_suggest="zlib"
2488 rtp_protocol_select="udp_protocol"
2489 sctp_protocol_deps="struct_sctp_event_subscribe"
2490 sctp_protocol_select="network"
2491 srtp_protocol_select="rtp_protocol srtp"
2492 tcp_protocol_select="network"
2493 tls_protocol_deps_any="gnutls openssl"
2494 tls_protocol_select="tcp_protocol"
2495 udp_protocol_select="network"
2496 unix_protocol_deps="sys_un_h"
2497 unix_protocol_select="network"
2498
2499 # filters
2500 asyncts_filter_deps="avresample"
2501 blackframe_filter_deps="gpl"
2502 boxblur_filter_deps="gpl"
2503 bs2b_filter_deps="libbs2b"
2504 cropdetect_filter_deps="gpl"
2505 deinterlace_qsv_filter_deps="libmfx"
2506 deinterlace_vaapi_filter_deps="vaapi"
2507 delogo_filter_deps="gpl"
2508 drawtext_filter_deps="libfreetype"
2509 drawtext_filter_suggest="libfontconfig"
2510 frei0r_filter_deps="frei0r libdl"
2511 frei0r_src_filter_deps="frei0r libdl"
2512 hdcd_filter_deps="libhdcd"
2513 hqdn3d_filter_deps="gpl"
2514 interlace_filter_deps="gpl"
2515 movie_filter_deps="avcodec avformat"
2516 ocv_filter_deps="libopencv"
2517 overlay_qsv_filter_deps="libmfx"
2518 overlay_qsv_filter_select="qsvvpp"
2519 resample_filter_deps="avresample"
2520 scale_filter_deps="swscale"
2521 scale_qsv_filter_deps="libmfx"
2522 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2523 vpp_qsv_filter_deps="libmfx"
2524 vpp_qsv_filter_select="qsvvpp"
2525
2526 # examples
2527 decode_audio_example_deps="avcodec avutil"
2528 decode_video_example_deps="avcodec avutil"
2529 encode_audio_example_deps="avcodec avutil"
2530 encode_video_example_deps="avcodec avutil"
2531 filter_audio_example_deps="avfilter avutil"
2532 metadata_example_deps="avformat avutil"
2533 output_example_deps="avcodec avformat avresample avutil swscale"
2534 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder"
2535 transcode_aac_example_deps="avcodec avformat avresample"
2536
2537 # EXTRALIBS_LIST
2538 cpu_init_extralibs="pthreads_extralibs"
2539 cws2fws_extralibs="zlib_extralibs"
2540
2541 # libraries, in linking order
2542 avcodec_deps="avutil"
2543 avcodec_select="null_bsf"
2544 avdevice_deps="avformat avcodec avutil"
2545 avfilter_deps="avutil"
2546 avformat_deps="avcodec avutil"
2547 avformat_suggest="network"
2548 avresample_deps="avutil"
2549 swscale_deps="avutil"
2550
2551 avcodec_extralibs="pthreads_extralibs libm_extralibs"
2552 avdevice_extralibs="libm_extralibs"
2553 avformat_extralibs="libm_extralibs"
2554 avfilter_extralibs="pthreads_extralibs libm_extralibs"
2555 avresample_extralibs="libm_extralibs"
2556 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"
2557 swscale_extralibs="libm_extralibs"
2558
2559 # programs
2560 avconv_deps="avcodec avfilter avformat avresample swscale"
2561 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2562                fps_filter null_filter resample_filter scale_filter
2563                trim_filter"
2564 avconv_suggest="psapi shell32"
2565 avplay_deps="avcodec avfilter avformat avresample sdl"
2566 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2567 avplay_suggest="shell32"
2568 avprobe_deps="avcodec avformat"
2569 avprobe_suggest="shell32"
2570
2571 # documentation
2572 pod2man_deps="doc"
2573 texi2html_deps="doc"
2574
2575 # default parameters
2576
2577 logfile="avbuild/config.log"
2578
2579 # installation paths
2580 prefix_default="/usr/local"
2581 bindir_default='${prefix}/bin'
2582 datadir_default='${prefix}/share/avconv'
2583 docdir_default='${prefix}/share/doc/libav'
2584 incdir_default='${prefix}/include'
2585 libdir_default='${prefix}/lib'
2586 mandir_default='${prefix}/share/man'
2587 shlibdir_default="$libdir_default"
2588
2589 # toolchain
2590 ar_default="ar"
2591 cc_default="gcc"
2592 host_cc_default="gcc"
2593 x86asmexe_default="nasm"
2594 ln_s="ln -s -f"
2595 nm_default="nm -g"
2596 pkg_config_default=pkg-config
2597 ranlib="ranlib"
2598 strip="strip"
2599 version_script='--version-script'
2600
2601 # machine
2602 arch_default=$(uname -m)
2603 cpu="generic"
2604 intrinsics="none"
2605
2606 # OS
2607 target_os_default=$(tolower $(uname -s))
2608 host_os=$target_os_default
2609
2610 # configurable options
2611 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2612
2613 enable asm
2614 enable debug
2615 enable doc
2616 enable faan faandct faanidct
2617 enable optimizations
2618 enable safe_bitstream_reader
2619 enable static
2620 enable swscale_alpha
2621 enable valgrind_backtrace
2622
2623 # By default, enable only those hwaccels that have no external dependencies.
2624 enable d3d11va dxva2 vda vdpau
2625
2626 # internal components are enabled by default
2627 enable $EXTRALIBS_LIST
2628
2629 # Avoid external, non-system, libraries getting enabled by dependency resolution
2630 disable $EXTERNAL_LIBRARY_LIST
2631
2632 # build settings
2633 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2634 LIBPREF="lib"
2635 LIBSUF=".a"
2636 LIBNAME='$(LIBPREF)$(NAME)$(LIBSUF)'
2637 SLIBPREF="lib"
2638 SLIBSUF=".so"
2639 SLIBNAME='$(SLIBPREF)$(NAME)$(SLIBSUF)'
2640 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2641 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2642 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2643 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2644 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2645 VERSION_SCRIPT_POSTPROCESS_CMD="cat"
2646
2647 asflags_filter=echo
2648 cflags_filter=echo
2649 ldflags_filter=echo
2650
2651 AS_C='-c'
2652 AS_O='-o $@'
2653 CC_C='-c'
2654 CC_E='-E -o $@'
2655 CC_O='-o $@'
2656 OBJCC_C='-c'
2657 OBJCC_E='-E -o $@'
2658 OBJCC_O='-o $@'
2659 X86ASM_O='-o $@'
2660 LD_O='-o $@'
2661 LD_LIB='-l%'
2662 LD_PATH='-L'
2663 HOSTCC_C='-c'
2664 HOSTCC_E='-E -o $@'
2665 HOSTCC_O='-o $@'
2666 HOSTLD_O='-o $@'
2667
2668 host_extralibs='-lm'
2669 host_cflags_filter=echo
2670 host_ldflags_filter=echo
2671
2672 target_path='$(CURDIR)'
2673
2674 # since the object filename is not given with the -MM flag, the compiler
2675 # is only able to print the basename, and we must add the path ourselves
2676 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2677 DEPFLAGS='-MM'
2678
2679 mkdir -p avbuild
2680
2681 # find source path
2682 if test -f configure; then
2683     source_path=.
2684 else
2685     source_path=$(cd $(dirname "$0"); pwd)
2686     echo "$source_path" | grep -q '[[:blank:]]' &&
2687         die "Out of tree builds are impossible with whitespace in source path."
2688     test -e "$source_path/config.h" &&
2689         die "Out of tree builds are impossible with config.h in source dir."
2690 fi
2691
2692 for v in "$@"; do
2693     r=${v#*=}
2694     l=${v%"$r"}
2695     r=$(sh_quote "$r")
2696     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2697 done
2698
2699 find_things(){
2700     thing=$1
2701     pattern=$2
2702     file=$source_path/$3
2703     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2704 }
2705
2706 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2707 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2708 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2709 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2710 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2711 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2712 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2713 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2714
2715 find_things_extern(){
2716     thing=$1
2717     pattern=$2
2718     file=$source_path/$3
2719     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2720 }
2721
2722 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2723 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2724
2725 AVCODEC_COMPONENTS_LIST="
2726     $BSF_LIST
2727     $DECODER_LIST
2728     $ENCODER_LIST
2729     $HWACCEL_LIST
2730     $PARSER_LIST
2731 "
2732
2733 AVDEVICE_COMPONENTS_LIST="
2734     $INDEV_LIST
2735 "
2736
2737 AVFILTER_COMPONENTS_LIST="
2738     $FILTER_LIST
2739 "
2740
2741 AVFORMAT_COMPONENTS_LIST="
2742     $DEMUXER_LIST
2743     $MUXER_LIST
2744     $PROTOCOL_LIST
2745 "
2746
2747 ALL_COMPONENTS="
2748     $AVCODEC_COMPONENTS_LIST
2749     $AVDEVICE_COMPONENTS_LIST
2750     $AVFILTER_COMPONENTS_LIST
2751     $AVFORMAT_COMPONENTS_LIST
2752 "
2753
2754 for n in $COMPONENT_LIST; do
2755     v=$(toupper ${n%s})_LIST
2756     eval enable \$$v
2757     eval ${n}_if_any="\$$v"
2758 done
2759
2760 enable $ARCH_EXT_LIST
2761
2762 die_unknown(){
2763     echo "Unknown option \"$1\"."
2764     echo "See $0 --help for available options."
2765     exit 1
2766 }
2767
2768 print_3_columns() {
2769     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2770 }
2771
2772 show_list() {
2773     suffix=_$1
2774     shift
2775     echo $* | sed s/$suffix//g | print_3_columns
2776     exit 0
2777 }
2778
2779 for opt do
2780     optval="${opt#*=}"
2781     case "$opt" in
2782         --extra-ldflags=*)
2783             add_ldflags $optval
2784         ;;
2785         --extra-ldexeflags=*)
2786             add_ldexeflags $optval
2787         ;;
2788         --extra-ldsoflags=*)
2789             add_ldsoflags $optval
2790         ;;
2791         --extra-libs=*)
2792             add_extralibs $optval
2793         ;;
2794         --disable-devices)
2795             disable $INDEV_LIST
2796         ;;
2797         --enable-debug=*)
2798             debuglevel="$optval"
2799         ;;
2800         --disable-programs)
2801             disable $PROGRAM_LIST
2802         ;;
2803         --disable-everything)
2804             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2805         ;;
2806         --disable-all)
2807             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2808             disable $LIBRARY_LIST $PROGRAM_LIST doc
2809         ;;
2810         --enable-*=*|--disable-*=*)
2811             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2812             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2813             eval list=\$$(toupper $thing)_LIST
2814             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2815             $action $(filter "$name" $list)
2816         ;;
2817         --enable-yasm|--disable-yasm)
2818             warn "The ${opt} option is only provided for compatibility and will be\n"\
2819                  "removed in the future. Use --enable-x86asm / --disable-x86asm instead."
2820             test $opt = --enable-yasm && x86asm=yes || x86asm=no
2821         ;;
2822         --enable-?*|--disable-?*)
2823             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2824             if is_in $option $COMPONENT_LIST; then
2825                 test $action = disable && action=unset
2826                 eval $action \$$(toupper ${option%s})_LIST
2827             elif is_in $option $CMDLINE_SELECT; then
2828                 $action $option
2829             else
2830                 die_unknown $opt
2831             fi
2832         ;;
2833         --list-*)
2834             NAME="${opt#--list-}"
2835             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2836             NAME=${NAME%s}
2837             eval show_list $NAME \$$(toupper $NAME)_LIST
2838         ;;
2839         --help|-h) show_help
2840         ;;
2841         --quiet|-q) quiet=yes
2842         ;;
2843         *)
2844             optname="${opt%%=*}"
2845             optname="${optname#--}"
2846             optname=$(echo "$optname" | sed 's/-/_/g')
2847             if is_in $optname $CMDLINE_SET; then
2848                 eval $optname='$optval'
2849             elif is_in $optname $CMDLINE_APPEND; then
2850                 append $optname "$optval"
2851             else
2852                 die_unknown $opt
2853             fi
2854         ;;
2855     esac
2856 done
2857
2858 for e in $env; do
2859     eval "export $e"
2860 done
2861
2862 disabled logging && logfile=/dev/null
2863
2864 # we need to build at least one lib type
2865 if ! enabled_any static shared; then
2866     cat <<EOF
2867 At least one library type must be built.
2868 Specify --enable-static to build the static libraries or --enable-shared to
2869 build the shared libraries as well. To only build the shared libraries specify
2870 --disable-static in addition to --enable-shared.
2871 EOF
2872     exit 1
2873 fi
2874
2875 # Die early if licensing-related configure options are incompatible.
2876 die_license_disabled() {
2877     enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
2878 }
2879
2880 map "die_license_disabled gpl"      $EXTERNAL_LIBRARY_GPL_LIST
2881 map "die_license_disabled nonfree"  $EXTERNAL_LIBRARY_NONFREE_LIST $HWACCEL_LIBRARY_NONFREE_LIST
2882 map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST
2883
2884 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
2885
2886 enabled_all gnutls openssl &&
2887     die "GnuTLS and OpenSSL must not be enabled at the same time."
2888
2889 # Disable all the library-specific components if the library itself
2890 # is disabled, see AVCODEC_LIST and following _LIST variables.
2891
2892 disable_components(){
2893     disabled ${1} && disable $(
2894         eval components="\$$(toupper ${1})_COMPONENTS"
2895         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2896     )
2897 }
2898
2899 map 'disable_components $v' $LIBRARY_LIST
2900
2901 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2902 set >> $logfile
2903
2904 case "$toolchain" in
2905     *-asan)
2906         cc_default="${toolchain%-asan}"
2907         add_cflags  -fsanitize=address
2908         add_ldflags -fsanitize=address
2909     ;;
2910     *-msan)
2911         cc_default="${toolchain%-msan}"
2912         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2913         add_ldflags -fsanitize=memory
2914     ;;
2915     *-tsan)
2916         cc_default="${toolchain%-tsan}"
2917         add_cflags  -fsanitize=thread -fPIE
2918         add_ldflags -fsanitize=thread -pie
2919         case "$toolchain" in
2920             gcc-tsan)
2921                 add_cflags  -fPIC
2922                 add_ldflags -fPIC
2923                 ;;
2924         esac
2925     ;;
2926     *-usan)
2927         cc_default="${toolchain%-usan}"
2928         add_cflags  -fsanitize=undefined
2929         add_ldflags -fsanitize=undefined
2930         case "$toolchain" in
2931             clang-usan)
2932                 add_cflags -O1
2933                 ;;
2934         esac
2935     ;;
2936     valgrind-*)
2937         target_exec_default="valgrind"
2938         case "$toolchain" in
2939             valgrind-massif)
2940                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2941                 ;;
2942             valgrind-memcheck)
2943                 target_exec_args="--track-origins=yes --leak-check=full"
2944                 ;;
2945         esac
2946     ;;
2947     msvc)
2948         # Check whether the current MSVC version needs the C99 converter.
2949         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2950         # support enough of C99 to build libav. Default to the new
2951         # behaviour if the regexp was unable to match anything, since this
2952         # successfully parses the version number of existing supported
2953         # versions that require the converter (MSVC 2010 and 2012).
2954         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2955         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2956             cc_default="cl"
2957         else
2958             cc_default="c99wrap cl"
2959         fi
2960         ld_default="$source_path/compat/windows/mslink"
2961         nm_default="dumpbin -symbols"
2962         ar_default="lib"
2963         case "$arch" in
2964         aarch64|arm64)
2965             as_default="armasm64"
2966             ;;
2967         arm*)
2968             as_default="armasm"
2969             ;;
2970         esac
2971         target_os_default="win32"
2972         # Use a relative path for TMPDIR. This makes sure all the
2973         # ffconf temp files are written with a relative path, avoiding
2974         # issues with msys/win32 path conversion for MSVC parameters
2975         # such as -Fo<file> or -out:<file>.
2976         TMPDIR=.
2977     ;;
2978     icl)
2979         cc_default="icl"
2980         ld_default="xilink"
2981         nm_default="dumpbin -symbols"
2982         ar_default="xilib"
2983         target_os_default="win32"
2984         TMPDIR=.
2985     ;;
2986     gcov)
2987         add_cflags  -fprofile-arcs -ftest-coverage
2988         add_ldflags -fprofile-arcs -ftest-coverage
2989     ;;
2990     llvm-cov)
2991         add_cflags -fprofile-arcs -ftest-coverage
2992         add_ldflags --coverage
2993     ;;
2994     hardened)
2995         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2996         add_cflags   -fno-strict-overflow -fstack-protector-all
2997         add_ldflags  -Wl,-z,relro -Wl,-z,now
2998     ;;
2999     ?*)
3000         die "Unknown toolchain $toolchain"
3001     ;;
3002 esac
3003
3004 test -n "$cross_prefix" && enable cross_compile
3005
3006 if enabled cross_compile; then
3007     test -n "$arch" && test -n "$target_os" ||
3008         die "Must specify target arch (--arch) and OS (--target-os) when cross-compiling"
3009 fi
3010
3011 ar_default="${cross_prefix}${ar_default}"
3012 cc_default="${cross_prefix}${cc_default}"
3013 objcc_default="${cross_prefix}${objcc_default}"
3014 x86asmexe_default="${cross_prefix}${x86asmexe_default}"
3015 nm_default="${cross_prefix}${nm_default}"
3016 pkg_config_default="${cross_prefix}${pkg_config_default}"
3017 ranlib="${cross_prefix}${ranlib}"
3018 strip="${cross_prefix}${strip}"
3019
3020 sysinclude_default="${sysroot}/usr/include"
3021
3022 set_default arch cc pkg_config sysinclude target_exec target_os x86asmexe
3023 enabled cross_compile || host_cc_default=$cc
3024 set_default host_cc
3025
3026 if ! $pkg_config --version >/dev/null 2>&1; then
3027     warn "$pkg_config not found, library detection may fail."
3028     pkg_config=false
3029 fi
3030
3031 exesuf() {
3032     case $1 in
3033         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
3034     esac
3035 }
3036
3037 EXESUF=$(exesuf $target_os)
3038 HOSTEXESUF=$(exesuf $host_os)
3039
3040 # set temporary file name
3041 : ${TMPDIR:=$TEMPDIR}
3042 : ${TMPDIR:=$TMP}
3043 : ${TMPDIR:=/tmp}
3044
3045 if ! check_cmd mktemp -u XXXXXX; then
3046     # simple replacement for missing mktemp
3047     # NOT SAFE FOR GENERAL USE
3048     mktemp(){
3049         tmpname="${2%%XXX*}.${HOSTNAME}.${UID}.$$"
3050         echo "$tmpname"
3051         mkdir "$tmpname"
3052     }
3053 fi
3054
3055 AVTMPDIR=$(mktemp -d "${TMPDIR}/avconf.XXXXXXXX" 2> /dev/null) ||
3056     die "Unable to create temporary directory in $TMPDIR."
3057
3058 tmpfile(){
3059     tmp="${AVTMPDIR}/test"$2
3060     (set -C; exec > $tmp) 2> /dev/null ||
3061         die "Unable to create temporary file in $AVTMPDIR."
3062     eval $1=$tmp
3063 }
3064
3065 trap 'rm -rf -- "$AVTMPDIR"' EXIT
3066 trap 'exit 2' INT
3067
3068 tmpfile TMPASM .asm
3069 tmpfile TMPC   .c
3070 tmpfile TMPE   $EXESUF
3071 tmpfile TMPH   .h
3072 tmpfile TMPO   .o
3073 tmpfile TMPS   .S
3074 tmpfile TMPSH  .sh
3075 tmpfile TMPV   .ver
3076
3077 unset -f mktemp
3078
3079 chmod +x $TMPE
3080
3081 # make sure we can execute files in $TMPDIR
3082 cat > $TMPSH 2>> $logfile <<EOF
3083 #! /bin/sh
3084 EOF
3085 chmod +x $TMPSH >> $logfile 2>&1
3086 if ! $TMPSH >> $logfile 2>&1; then
3087     cat <<EOF
3088 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
3089 variable to another directory and make sure that it is not mounted noexec.
3090 EOF
3091     die "Sanity test failed."
3092 fi
3093
3094 armasm_flags(){
3095     for flag; do
3096         case $flag in
3097             # Filter out MSVC cl.exe options from cflags that shouldn't
3098             # be passed to gas-preprocessor
3099             -M[TD]*)                                            ;;
3100             *)                  echo $flag                      ;;
3101         esac
3102    done
3103 }
3104
3105 cparser_flags(){
3106     for flag; do
3107         case $flag in
3108             -Wno-switch)             echo -Wno-switch-enum ;;
3109             -Wno-format-zero-length) ;;
3110             -Wdisabled-optimization) ;;
3111             -Wno-pointer-sign)       echo -Wno-other ;;
3112             *)                       echo $flag ;;
3113         esac
3114     done
3115 }
3116
3117 msvc_common_flags(){
3118     for flag; do
3119         case $flag in
3120             # In addition to specifying certain flags under the compiler
3121             # specific filters, they must be specified here as well or else the
3122             # generic catch all at the bottom will print the original flag.
3123             -Wall)                ;;
3124             -Wextra)              ;;
3125             -std=c99)             ;;
3126             # Common flags
3127             -fomit-frame-pointer) ;;
3128             -g)                   echo -Z7 ;;
3129             -fno-math-errno)      ;;
3130             -fno-common)          ;;
3131             -fno-signed-zeros)    ;;
3132             -fPIC)                ;;
3133             -mthumb)              ;;
3134             -march=*)             ;;
3135             -lz)                  echo zlib.lib ;;
3136             -lx264)               echo libx264.lib ;;
3137             -l*)                  echo ${flag#-l}.lib ;;
3138             -L*)                  echo -libpath:${flag#-L} ;;
3139             *)                    echo $flag ;;
3140         esac
3141     done
3142 }
3143
3144 msvc_flags(){
3145     msvc_common_flags "$@"
3146     for flag; do
3147         case $flag in
3148             -Wall)                echo -W3 -wd4018 -wd4146 -wd4244 -wd4305     \
3149                                        -wd4554 ;;
3150             -Wextra)              echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3151                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3152                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3153                                        -wd4273 -wd4554 -wd4701 -wd4703 ;;
3154         esac
3155     done
3156 }
3157
3158 icl_flags(){
3159     msvc_common_flags "$@"
3160     for flag; do
3161         case $flag in
3162             # Despite what Intel's documentation says -Wall, which is supported
3163             # on Windows, does enable remarks so disable them here.
3164             -Wall)                echo $flag -Qdiag-disable:remark ;;
3165             -std=c99)             echo -Qstd=c99 ;;
3166         esac
3167     done
3168 }
3169
3170 suncc_flags(){
3171     for flag; do
3172         case $flag in
3173             -march=*|-mcpu=*)
3174                 case "${flag#*=}" in
3175                     native)                   echo -xtarget=native       ;;
3176                     v9|niagara)               echo -xarch=sparc          ;;
3177                     ultrasparc)               echo -xarch=sparcvis       ;;
3178                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3179                     i586|pentium)             echo -xchip=pentium        ;;
3180                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3181                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3182                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3183                     pentium4*)          echo -xtarget=pentium4           ;;
3184                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3185                     *-sse3)             echo -xarch=sse3                 ;;
3186                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3187                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3188                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3189                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3190                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3191                     k8|opteron|athlon64|athlon-fx)
3192                                                echo -xarch=sse2a         ;;
3193                     athlon*)                   echo -xarch=pentium_proa  ;;
3194                 esac
3195                 ;;
3196             -std=c99)             echo -xc99              ;;
3197             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3198             -fPIC)                echo -KPIC -xcode=pic32 ;;
3199             -W*,*)                echo $flag              ;;
3200             -f*-*|-W*|-mimpure-text)                      ;;
3201             -shared)              echo -G                 ;;
3202             *)                    echo $flag              ;;
3203         esac
3204     done
3205 }
3206
3207 probe_cc(){
3208     pfx=$1
3209     _cc=$2
3210
3211     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3212     unset _ld_o _ldflags _ld_lib _ld_path
3213     unset _depflags _DEPCMD _DEPFLAGS
3214     _flags_filter=echo
3215
3216     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3217         _type=llvm_gcc
3218         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3219         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3220         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3221         _cflags_speed='-O3'
3222         _cflags_size='-Os'
3223     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3224         _type=gcc
3225         gcc_version=$($_cc --version | head -n1)
3226         gcc_basever=$($_cc -dumpversion)
3227         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3228         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3229         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3230         if ! $_cc -dumpversion | grep -q '^2\.'; then
3231             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3232         fi
3233         _cflags_speed='-O3'
3234         _cflags_size='-Os'
3235     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3236         _type=icc
3237         _ident=$($_cc --version | head -n1)
3238         _depflags='-MMD'
3239         _cflags_speed='-O3'
3240         _cflags_size='-Os'
3241         _cflags_noopt='-O1'
3242     elif $_cc -v 2>&1 | grep -q xlc; then
3243         _type=xlc
3244         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3245         _cflags_speed='-O5'
3246         _cflags_size='-O5 -qcompact'
3247     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3248         test -d "$sysroot" || die "No valid sysroot specified."
3249         _type=armcc
3250         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3251         armcc_conf="$PWD/armcc.conf"
3252         $_cc --arm_linux_configure                 \
3253              --arm_linux_config_file="$armcc_conf" \
3254              --configure_sysroot="$sysroot"        \
3255              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3256              die "Error creating armcc configuration file."
3257         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3258         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3259         as_default="${cross_prefix}gcc"
3260         _depflags='-MMD'
3261         _cflags_speed='-O3'
3262         _cflags_size='-Os'
3263     elif $_cc -v 2>&1 | grep -q clang; then
3264         _type=clang
3265         _ident=$($_cc --version 2>/dev/null | head -n1)
3266         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3267         _cflags_speed='-O3'
3268         _cflags_size='-Os'
3269     elif $_cc -V 2>&1 | grep -q Sun; then
3270         _type=suncc
3271         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3272         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3273         _DEPFLAGS='-xM1 -xc99'
3274         _ldflags='-std=c99'
3275         _cflags_speed='-O5'
3276         _cflags_size='-O5 -xspace'
3277         _flags_filter=suncc_flags
3278     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3279         _type=pathscale
3280         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3281         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3282         _cflags_speed='-O2'
3283         _cflags_size='-Os'
3284         _flags_filter='filter_out -Wdisabled-optimization'
3285     elif $_cc -v 2>&1 | grep -q Open64; then
3286         _type=open64
3287         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3288         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3289         _cflags_speed='-O2'
3290         _cflags_size='-Os'
3291         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3292     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3293         _type=armasm
3294         _ident=$($_cc | head -n1)
3295         # 4509: "This form of conditional instruction is deprecated"
3296         _flags="-nologo -ignore 4509"
3297         _flags_filter=armasm_flags
3298     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3299         _type=msvc
3300         _ident=$($_cc 2>&1 | head -n1)
3301         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3302         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3303         _cflags_speed="-O2"
3304         _cflags_size="-O1"
3305         _cflags_noopt="-O1"
3306         if $_cc -nologo- 2>&1 | grep -q Linker; then
3307             _ld_o='-out:$@'
3308         else
3309             _ld_o='-Fe$@'
3310         fi
3311         _cc_o='-Fo$@'
3312         _cc_e='-P -Fi$@'
3313         _flags_filter=msvc_flags
3314         _ld_lib='lib%.a'
3315         _ld_path='-libpath:'
3316         _flags='-nologo'
3317     elif $_cc 2>&1 | grep -q Intel; then
3318         _type=icl
3319         _ident=$($_cc 2>&1 | head -n1)
3320         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3321         # Not only is O3 broken on 13.x+ but it is slower on all previous
3322         # versions (tested) as well.
3323         _cflags_speed="-O2"
3324         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3325         if $_cc 2>&1 | grep -q Linker; then
3326             _ld_o='-out:$@'
3327         else
3328             _ld_o='-Fe$@'
3329         fi
3330         _cc_o='-Fo$@'
3331         _cc_e='-P'
3332         _flags_filter=icl_flags
3333         _ld_lib='lib%.a'
3334         _ld_path='-libpath:'
3335         # -Qdiag-error to make icl error when seeing certain unknown arguments
3336         _flags='-nologo -Qdiag-error:4044,10157'
3337         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3338         # with MSVC which enables it by default.
3339         _cflags='-Qms0 -Qvec- -Qsimd- -GS'
3340     elif $_cc -? 2>/dev/null | grep -q 'LLVM.*Linker'; then
3341         # lld can emulate multiple different linkers; in ms link.exe mode,
3342         # the -? parameter gives the help output which contains an identifyable
3343         # string, while it gives an error in other modes.
3344         _type=lld-link
3345         # The link.exe mode doesn't have a switch for getting the version,
3346         # but we can force it back to gnu mode and get the version from there.
3347         _ident=$($_cc -flavor gnu --version 2>/dev/null)
3348         _ld_o='-out:$@'
3349         _flags_filter=msvc_flags
3350         _ld_lib='lib%.a'
3351         _ld_path='-libpath:'
3352     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3353         _type=cparser
3354         _ident=$($_cc --version | head -n1)
3355         _depflags='-MMD'
3356         _cflags_speed='-O4'
3357         _cflags_size='-O2'
3358         _flags_filter=cparser_flags
3359     fi
3360
3361     eval ${pfx}_type=\$_type
3362     eval ${pfx}_ident=\$_ident
3363 }
3364
3365 set_ccvars(){
3366     eval ${1}_C=\${_cc_c-\${${1}_C}}
3367     eval ${1}_E=\${_cc_e-\${${1}_E}}
3368     eval ${1}_O=\${_cc_o-\${${1}_O}}
3369
3370     if [ -n "$_depflags" ]; then
3371         eval ${1}_DEPFLAGS=\$_depflags
3372     else
3373         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3374         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3375         eval DEP${1}FLAGS=\$_flags
3376     fi
3377 }
3378
3379 probe_cc cc "$cc"
3380 cflags_filter=$_flags_filter
3381 cflags_speed=$_cflags_speed
3382 cflags_size=$_cflags_size
3383 cflags_noopt=$_cflags_noopt
3384 add_cflags $_flags $_cflags
3385 cc_ldflags=$_ldflags
3386 set_ccvars CC
3387
3388 probe_cc hostcc "$host_cc"
3389 host_cflags_filter=$_flags_filter
3390 host_cflags_speed=$_cflags_speed
3391 add_host_cflags  $_flags $_cflags
3392 set_ccvars HOSTCC
3393
3394 test -n "$cc_type" && enable $cc_type ||
3395     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3396
3397 : ${as_default:=$cc}
3398 : ${objcc_default:=$cc}
3399 : ${dep_cc_default:=$cc}
3400 : ${ld_default:=$cc}
3401 : ${host_ld_default:=$host_cc}
3402 set_default ar as objcc dep_cc ld host_ld
3403
3404 probe_cc as "$as"
3405 asflags_filter=$_flags_filter
3406 add_asflags $_flags $_cflags
3407 set_ccvars AS
3408
3409 probe_cc objcc "$objcc"
3410 objcflags_filter=$_flags_filter
3411 add_objcflags $_flags $_cflags
3412 set_ccvars OBJC
3413
3414 probe_cc ld "$ld"
3415 ldflags_filter=$_flags_filter
3416 add_ldflags $_flags $_ldflags
3417 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3418 LD_O=${_ld_o-$LD_O}
3419 LD_LIB=${_ld_lib-$LD_LIB}
3420 LD_PATH=${_ld_path-$LD_PATH}
3421
3422 probe_cc hostld "$host_ld"
3423 host_ldflags_filter=$_flags_filter
3424 add_host_ldflags $_flags $_ldflags
3425 HOSTLD_O=${_ld_o-$HOSTLD_O}
3426
3427 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3428     probe_cc depcc "$dep_cc"
3429     CCDEP=${_DEPCMD:-$DEPCMD}
3430     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3431     DEPCCFLAGS=$_flags
3432 fi
3433
3434 if $ar 2>&1 | grep -q Microsoft; then
3435     arflags="-nologo"
3436     ar_o='-out:$@'
3437 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3438     arflags='-Xany -r -c'
3439     ar_o='$@'
3440 else
3441     arflags="rc"
3442     ar_o='$@'
3443 fi
3444
3445 add_cflags $extra_cflags
3446 add_objcflags $extra_objcflags
3447 add_asflags $extra_cflags
3448
3449 if test -n "$sysroot"; then
3450     case "$cc_type" in
3451         gcc|llvm_gcc|clang)
3452             add_cppflags --sysroot="$sysroot"
3453             add_ldflags --sysroot="$sysroot"
3454         ;;
3455     esac
3456 fi
3457
3458 if test "$cpu" = host; then
3459     enabled cross_compile &&
3460         die "--cpu=host makes no sense when cross-compiling."
3461
3462     case "$cc_type" in
3463         gcc|llvm_gcc)
3464             check_native(){
3465                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3466                 sed -n "/cc1.*$1=/{
3467                             s/.*$1=\\([^ ]*\\).*/\\1/
3468                             p
3469                             q
3470                         }" $TMPE
3471             }
3472             cpu=$(check_native -march || check_native -mcpu)
3473         ;;
3474     esac
3475
3476     test "${cpu:-host}" = host &&
3477         die "--cpu=host not supported with compiler $cc"
3478 fi
3479
3480 # Deal with common $arch aliases
3481 case "$arch" in
3482     aarch64|arm64)
3483         arch="aarch64"
3484     ;;
3485     arm*)
3486         arch="arm"
3487     ;;
3488     mips*|IP*)
3489         case "$arch" in
3490         *el)
3491             add_cppflags -EL
3492             add_ldflags -EL
3493         ;;
3494         *eb)
3495             add_cppflags -EB
3496             add_ldflags -EB
3497         ;;
3498         esac
3499         arch="mips"
3500     ;;
3501     parisc*|hppa*)
3502         arch="parisc"
3503     ;;
3504     "Power Macintosh"|ppc*|powerpc*)
3505         arch="ppc"
3506     ;;
3507     s390|s390x)
3508         arch="s390"
3509     ;;
3510     sh4|sh)
3511         arch="sh4"
3512     ;;
3513     sun4u|sparc*)
3514         arch="sparc"
3515     ;;
3516     tilegx|tile-gx)
3517         arch="tilegx"
3518     ;;
3519     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3520         arch="x86"
3521     ;;
3522 esac
3523
3524 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3525 enable $arch
3526
3527 # Add processor-specific flags
3528 if enabled aarch64; then
3529
3530     case $cpu in
3531         armv*)
3532             cpuflags="-march=$cpu"
3533         ;;
3534         *)
3535             cpuflags="-mcpu=$cpu"
3536         ;;
3537     esac
3538
3539 elif enabled alpha; then
3540
3541     cpuflags="-mcpu=$cpu"
3542
3543 elif enabled arm; then
3544
3545     check_arm_arch() {
3546         check_cpp_condition stddef.h \
3547             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3548             $cpuflags
3549     }
3550
3551     probe_arm_arch() {
3552         if   check_arm_arch 4;        then echo armv4
3553         elif check_arm_arch 4T;       then echo armv4t
3554         elif check_arm_arch 5;        then echo armv5
3555         elif check_arm_arch 5E;       then echo armv5e
3556         elif check_arm_arch 5T;       then echo armv5t
3557         elif check_arm_arch 5TE;      then echo armv5te
3558         elif check_arm_arch 5TEJ;     then echo armv5te
3559         elif check_arm_arch 6;        then echo armv6
3560         elif check_arm_arch 6J;       then echo armv6j
3561         elif check_arm_arch 6K;       then echo armv6k
3562         elif check_arm_arch 6Z;       then echo armv6z
3563         elif check_arm_arch 6ZK;      then echo armv6zk
3564         elif check_arm_arch 6T2;      then echo armv6t2
3565         elif check_arm_arch 7;        then echo armv7
3566         elif check_arm_arch 7A  7_A;  then echo armv7-a
3567         elif check_arm_arch 7S;       then echo armv7-a
3568         elif check_arm_arch 7R  7_R;  then echo armv7-r
3569         elif check_arm_arch 7M  7_M;  then echo armv7-m
3570         elif check_arm_arch 7EM 7E_M; then echo armv7-m
3571         elif check_arm_arch 8A  8_A;  then echo armv8-a
3572         fi
3573     }
3574
3575     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3576
3577     case $cpu in
3578         armv*)
3579             cpuflags="-march=$cpu"
3580             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3581         ;;
3582         *)
3583             cpuflags="-mcpu=$cpu"
3584             case $cpu in
3585                 cortex-a*)                               subarch=armv7a  ;;
3586                 cortex-r*)                               subarch=armv7r  ;;
3587                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3588                 arm11*)                                  subarch=armv6   ;;
3589                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3590                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3591                 *)                             subarch=$(probe_arm_arch) ;;
3592             esac
3593         ;;
3594     esac
3595
3596     case "$subarch" in
3597         armv5t*)    enable fast_clz                ;;
3598         armv[6-8]*) enable fast_clz fast_unaligned ;;
3599     esac
3600
3601 elif enabled avr32; then
3602
3603     case $cpu in
3604         ap7[02]0[0-2])
3605             subarch="avr32_ap"
3606             cpuflags="-mpart=$cpu"
3607         ;;
3608         ap)
3609             subarch="avr32_ap"
3610             cpuflags="-march=$cpu"
3611         ;;
3612         uc3[ab]*)
3613             subarch="avr32_uc"
3614             cpuflags="-mcpu=$cpu"
3615         ;;
3616         uc)
3617             subarch="avr32_uc"
3618             cpuflags="-march=$cpu"
3619         ;;
3620     esac
3621
3622 elif enabled bfin; then
3623
3624     cpuflags="-mcpu=$cpu"
3625
3626 elif enabled mips; then
3627
3628     cpuflags="-march=$cpu"
3629
3630 elif enabled ppc; then
3631
3632     disable ldbrx
3633
3634     case $(tolower $cpu) in
3635         601|ppc601|powerpc601)
3636             cpuflags="-mcpu=601"
3637             disable altivec
3638         ;;
3639         603*|ppc603*|powerpc603*)
3640             cpuflags="-mcpu=603"
3641             disable altivec
3642         ;;
3643         604*|ppc604*|powerpc604*)
3644             cpuflags="-mcpu=604"
3645             disable altivec
3646         ;;
3647         g3|75*|ppc75*|powerpc75*)
3648             cpuflags="-mcpu=750"
3649             disable altivec
3650         ;;
3651         g4|745*|ppc745*|powerpc745*)
3652             cpuflags="-mcpu=7450"
3653             disable vsx
3654         ;;
3655         74*|ppc74*|powerpc74*)
3656             cpuflags="-mcpu=7400"
3657             disable vsx
3658         ;;
3659         g5|970|ppc970|powerpc970)
3660             cpuflags="-mcpu=970"
3661             disable vsx
3662         ;;
3663         power[3-6]*)
3664             cpuflags="-mcpu=$cpu"
3665             disable vsx
3666         ;;
3667         power[7-8]*)
3668             cpuflags="-mcpu=$cpu"
3669             enable ldbrx
3670         ;;
3671         cell)
3672             cpuflags="-mcpu=cell"
3673             enable ldbrx
3674             disable vsx
3675         ;;
3676         e500mc)
3677             cpuflags="-mcpu=e500mc"
3678             disable altivec
3679         ;;
3680         e500v2)
3681             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3682             disable altivec
3683             disable dcbzl
3684         ;;
3685         e500)
3686             cpuflags="-mcpu=8540 -mhard-float"
3687             disable altivec
3688             disable dcbzl
3689         ;;
3690     esac
3691
3692 elif enabled sparc; then
3693
3694     case $cpu in
3695         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3696             cpuflags="-mcpu=$cpu"
3697         ;;
3698         ultrasparc*|niagara[234])
3699             cpuflags="-mcpu=$cpu"
3700         ;;
3701     esac
3702
3703 elif enabled x86; then
3704
3705     case $cpu in
3706         i[345]86|pentium)
3707             cpuflags="-march=$cpu"
3708             disable i686
3709             disable mmx
3710         ;;
3711         # targets that do NOT support nopl and conditional mov (cmov)
3712         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3713             cpuflags="-march=$cpu"
3714             disable i686
3715         ;;
3716         # targets that do support nopl and conditional mov (cmov)
3717         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3718             cpuflags="-march=$cpu"
3719             enable i686
3720             enable fast_cmov
3721         ;;
3722         # targets that do support conditional mov but on which it's slow
3723         pentium4|pentium4m|prescott|nocona)
3724             cpuflags="-march=$cpu"
3725             enable i686
3726             disable fast_cmov
3727         ;;
3728     esac
3729
3730 fi
3731
3732 if [ "$cpu" != generic ]; then
3733     add_cflags  $cpuflags
3734     add_asflags $cpuflags
3735     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3736 fi
3737
3738 # compiler sanity check
3739 check_exec <<EOF
3740 int main(void){ return 0; }
3741 EOF
3742 if test "$?" != 0; then
3743     echo "$cc is unable to create an executable file."
3744     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3745         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3746         echo "Only do this if you know what cross compiling means."
3747     fi
3748     die "C compiler test failed."
3749 fi
3750
3751 add_cppflags -D_ISOC99_SOURCE
3752
3753 # some compilers silently accept -std=c11, so we also need to check that the
3754 # version macro is defined properly
3755 check_cpp_condition stdlib.h  "__STDC_VERSION__ >= 201112L" -std=c11 &&
3756     add_cflags -std=c11 ||
3757     check_cflags -std=c99
3758
3759 check_cppflags -D_FILE_OFFSET_BITS=64
3760 check_cppflags -D_LARGEFILE_SOURCE
3761
3762 add_host_cppflags -D_ISOC99_SOURCE
3763 check_host_cflags -std=c99
3764 check_host_cflags -Wall
3765 check_host_cflags $host_cflags_speed
3766
3767 check_64bit(){
3768     arch32=$1
3769     arch64=$2
3770     expr=$3
3771     check_code cc "" "int test[2*($expr) - 1]" &&
3772         subarch=$arch64 || subarch=$arch32
3773 }
3774
3775 case "$arch" in
3776     aarch64|alpha|ia64)
3777         spic=$shared
3778     ;;
3779     mips)
3780         check_64bit mips mips64 '_MIPS_SIM > 1'
3781         spic=$shared
3782     ;;
3783     parisc)
3784         check_64bit parisc parisc64 'sizeof(void *) > 4'
3785         spic=$shared
3786     ;;
3787     ppc)
3788         check_64bit ppc ppc64 'sizeof(void *) > 4'
3789         spic=$shared
3790     ;;
3791     s390)
3792         check_64bit s390 s390x 'sizeof(void *) > 4'
3793         spic=$shared
3794     ;;
3795     sparc)
3796         check_64bit sparc sparc64 'sizeof(void *) > 4'
3797         spic=$shared
3798     ;;
3799     x86)
3800         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3801         if test "$subarch" = "x86_64"; then
3802             spic=$shared
3803         fi
3804     ;;
3805 esac
3806
3807 enable $subarch
3808 enabled spic && enable_weak pic
3809
3810 enabled x86_64 && objformat=elf64 || objformat="elf32"
3811
3812 # OS specific
3813 case $target_os in
3814     aix)
3815         SHFLAGS=-shared
3816         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3817         enabled shared && add_ldflags -Wl,-brtl
3818         ;;
3819     android)
3820         disable symver
3821         enable section_data_rel_ro
3822         SLIB_INSTALL_NAME='$(SLIBNAME)'
3823         SLIB_INSTALL_LINKS=
3824         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3825         ;;
3826     haiku)
3827         prefix_default="/boot/common"
3828         network_extralibs="-lnetwork"
3829         host_extralibs=
3830         ;;
3831     sunos)
3832         SHFLAGS='-shared -Wl,-h,$$(@F)'
3833         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3834         network_extralibs="-lsocket -lnsl"
3835         # When using suncc to build, the Solaris linker will mark
3836         # an executable with each instruction set encountered by
3837         # the Solaris assembler.  As our libraries contain their own
3838         # guards for processor-specific code, instead suppress
3839         # generation of the HWCAPS ELF section on Solaris x86 only.
3840         enabled_all suncc x86 &&
3841             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3842             add_ldflags -Wl,-M,mapfile
3843         nm_default='nm -P -g'
3844         version_script='-M'
3845         VERSION_SCRIPT_POSTPROCESS_CMD='perl $(SRC_PATH)/compat/solaris/make_sunver.pl - $(OBJS)'
3846         ;;
3847     netbsd)
3848         disable symver
3849         oss_indev_extralibs="-lossaudio"
3850         ;;
3851     openbsd|bitrig)
3852         disable symver
3853         SHFLAGS='-shared'
3854         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3855         SLIB_INSTALL_LINKS=
3856         oss_indev_extralibs="-lossaudio"
3857         ;;
3858     dragonfly)
3859         disable symver
3860         ;;
3861     freebsd)
3862         ;;
3863     bsd/os)
3864         add_extralibs -lpoll -lgnugetopt
3865         ;;
3866     darwin)
3867         enabled ppc && add_asflags -force_cpusubtype_ALL
3868         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3869         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3870         add_ldflags -Wl,-dynamic,-search_paths_first
3871         check_cflags -Werror=partial-availability
3872         SLIBSUF=".dylib"
3873         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME).$(LIBVERSION)$(SLIBSUF)'
3874         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME).$(LIBMAJOR)$(SLIBSUF)'
3875         enabled x86_64 && objformat="macho64" || objformat="macho32"
3876         enabled_any pic shared ||
3877             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3878         check_header dispatch/dispatch.h &&
3879             add_cppflags '-I\$(SRC_PATH)/compat/dispatch_semaphore'
3880         if test -n "$sysroot"; then
3881             is_in -isysroot $cc $CPPFLAGS $CFLAGS || check_cppflags -isysroot $sysroot
3882             is_in -isysroot $ld $LDFLAGS          || check_ldflags  -isysroot $sysroot
3883         fi
3884         ;;
3885     msys*)
3886         die "Native MSYS builds are discouraged, please use the MINGW environment."
3887         ;;
3888     mingw32*|mingw64*)
3889         target_os=mingw32
3890         if enabled shared; then
3891             # Cannot build both shared and static libs when using dllexport.
3892             disable static
3893         fi
3894         check_ldflags -Wl,--nxcompat
3895         check_ldflags -Wl,--dynamicbase
3896         shlibdir_default="$bindir_default"
3897         SLIBPREF=""
3898         SLIBSUF=".dll"
3899         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3900         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3901         SLIB_EXTRA_CMD='cp $(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3902         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3903         SLIB_INSTALL_LINKS=
3904         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3905         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3906         SLIB_CREATE_DEF_CMD='ARCH="$(ARCH)" AR="$(AR_CMD)" NM="$(NM_CMD)" $(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3907         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-auto-image-base $$(@:$(SLIBSUF)=.def)'
3908         enabled x86_64 && objformat="win64" || objformat="win32"
3909         ranlib=:
3910         enable dos_paths
3911         ;;
3912     win32|win64)
3913         disable symver
3914         if enabled shared; then
3915             # Link to the import library instead of the normal static library
3916             # for shared libs.
3917             LD_LIB='%.lib'
3918             # Cannot build both shared and static libs with MSVC or icl.
3919             disable static
3920         fi
3921         shlibdir_default="$bindir_default"
3922         SLIBPREF=""
3923         SLIBSUF=".dll"
3924         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3925         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3926         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3927         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3928         SLIB_INSTALL_LINKS=
3929         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3930         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3931         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3932         enabled x86_64 && objformat="win64" || objformat="win32"
3933         ranlib=:
3934         enable dos_paths
3935         ;;
3936     cygwin*)
3937         target_os=cygwin
3938         shlibdir_default="$bindir_default"
3939         SLIBPREF="cyg"
3940         SLIBSUF=".dll"
3941         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3942         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3943         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3944         SLIB_INSTALL_LINKS=
3945         SLIB_INSTALL_EXTRA_LIB='lib$(NAME).dll.a'
3946         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(NAME).dll.a'
3947         enabled x86_64 && objformat="win64" || objformat="win32"
3948         enable dos_paths
3949         ;;
3950     *-dos|freedos|opendos)
3951         network_extralibs="-lsocket"
3952         objformat="coff"
3953         enable dos_paths
3954         add_cppflags -U__STRICT_ANSI__
3955         ;;
3956     linux)
3957         enable section_data_rel_ro
3958         ;;
3959     irix*)
3960         target_os=irix
3961         ranlib="echo ignoring ranlib"
3962         ;;
3963     os/2*)
3964         ln_s="cp -f"
3965         objformat="aout"
3966         add_cppflags -D_GNU_SOURCE
3967         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zhigh-mem -Zmap
3968         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3969         LIBSUF="_s.a"
3970         SLIBPREF=""
3971         SLIBSUF=".dll"
3972         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3973         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3974         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3975             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3976             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3977             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3978             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3979         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3980             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3981         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3982         enable dos_paths
3983         ;;
3984     gnu/kfreebsd)
3985         add_cppflags -D_BSD_SOURCE
3986         ;;
3987     gnu)
3988         ;;
3989     qnx)
3990         add_cppflags -D_QNX_SOURCE
3991         network_extralibs="-lsocket"
3992         ;;
3993     symbian)
3994         SLIBSUF=".dll"
3995         enable dos_paths
3996         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3997         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3998         add_ldflags -Wl,--target1-abs,--no-undefined \
3999                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
4000                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
4001         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
4002                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
4003                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
4004         ;;
4005     minix)
4006         ;;
4007     none)
4008         ;;
4009     *)
4010         die "Unknown OS '$target_os'."
4011         ;;
4012 esac
4013
4014 # determine libc flavour
4015
4016 probe_libc(){
4017     pfx=$1
4018     pfx_no_=${pfx%_}
4019     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
4020     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
4021         eval ${pfx}libc_type=uclibc
4022         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4023     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
4024         eval ${pfx}libc_type=glibc
4025         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4026     # MinGW headers can be installed on Cygwin, so check for newlib first.
4027     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
4028         eval ${pfx}libc_type=newlib
4029         add_${pfx}cppflags -U__STRICT_ANSI__ -D_XOPEN_SOURCE=600
4030     # MinGW64 is backwards compatible with MinGW32, so check for it first.
4031     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
4032         eval ${pfx}libc_type=mingw64
4033         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4034         eval test \$${pfx_no_}cc_type = "gcc" &&
4035             add_${pfx}cppflags -D__printf__=__gnu_printf__
4036     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
4037          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
4038         eval ${pfx}libc_type=mingw32
4039         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
4040             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
4041             die "ERROR: MinGW32 runtime version must be >= 3.15."
4042         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4043         check_${pfx}cpp_condition _mingw.h "__MSVCRT_VERSION__ < 0x0700" &&
4044             add_${pfx}cppflags -D__MSVCRT_VERSION__=0x0700
4045         check_${pfx}cpp_condition windows.h "defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0502" &&
4046             add_${pfx}cppflags -D_WIN32_WINNT=0x0502
4047         eval test \$${pfx_no_}cc_type = "gcc" &&
4048             add_${pfx}cppflags -D__printf__=__gnu_printf__
4049     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
4050         eval ${pfx}libc_type=msvcrt
4051         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
4052             if [ "$pfx" = host_ ]; then
4053                 add_host_cppflags -Dsnprintf=_snprintf
4054             else
4055                 add_compat strtod.o strtod=avpriv_strtod
4056                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
4057                                              _snprintf=avpriv_snprintf  \
4058                                              vsnprintf=avpriv_vsnprintf
4059             fi
4060         fi
4061         add_${pfx}cppflags -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS
4062         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
4063         # 0x601 by default unless something else is set by the user.
4064         # This can easily lead to us detecting functions only present
4065         # in such new versions and producing binaries requiring windows 7.0.
4066         # Therefore explicitly set the default to XP unless the user has
4067         # set something else on the command line.
4068         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
4069         # family. For these cases, configure is free to use any functions
4070         # found in the SDK headers by default. (Alternatively, we could force
4071         # _WIN32_WINNT to 0x0602 in that case.)
4072         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
4073             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
4074 #ifdef WINAPI_FAMILY
4075 #include <winapifamily.h>
4076 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4077 #error not desktop
4078 #endif
4079 #endif
4080 EOF
4081         if [ "$pfx" = "" ]; then
4082             check_func strtoll || add_cflags -Dstrtoll=_strtoi64
4083         fi
4084     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4085         eval ${pfx}libc_type=klibc
4086     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4087         eval ${pfx}libc_type=bionic
4088     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4089         eval ${pfx}libc_type=solaris
4090         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4091     else
4092         eval ${pfx}libc_type=default
4093         add_${pfx}cppflags -D_DEFAULT_SOURCE
4094     fi
4095     eval test -n "\${${pfx}libc_type}" && enable ${pfx}libc_${libc_type}
4096 }
4097
4098 probe_libc
4099 probe_libc host_
4100
4101 # hacks for compiler/libc/os combinations
4102
4103 case $libc_type in
4104     bionic)
4105         add_compat strtod.o strtod=avpriv_strtod
4106         ;;
4107 esac
4108
4109 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4110     add_cppflags '-I\$(SRC_PATH)/compat/float'
4111
4112 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4113
4114 set_default $PATHS_LIST
4115 set_default nm
4116
4117 disabled optimizations || check_cflags -fomit-frame-pointer
4118
4119 enable_weak_pic() {
4120     disabled pic && return
4121     enable pic
4122     add_cppflags -DPIC
4123     case "$target_os" in
4124     mingw*|cygwin*|win*)
4125         ;;
4126     *)
4127         add_cflags -fPIC
4128         add_asflags -fPIC
4129         ;;
4130     esac
4131 }
4132
4133 enabled pic && enable_weak_pic
4134
4135 check_cc <<EOF || die "Symbol mangling check failed."
4136 int ff_extern;
4137 EOF
4138 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4139 extern_prefix=${sym%%ff_extern*}
4140
4141 ! disabled inline_asm && check_inline_asm inline_asm '"" ::'
4142
4143 _restrict=
4144 for restrict_keyword in restrict __restrict__ __restrict; do
4145     check_cc <<EOF && _restrict=$restrict_keyword && break
4146 void foo(char * $restrict_keyword p);
4147 EOF
4148 done
4149
4150 check_cc <<EOF && enable pragma_deprecated
4151 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4152 EOF
4153
4154 check_cc <<EOF || die "endian test failed"
4155 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4156 EOF
4157 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4158
4159 check_gas() {
4160     log "check_gas using '$as' as AS"
4161     # :vararg is used on aarch64, arm and ppc altivec
4162     check_as <<EOF || return 1
4163 .macro m n, y:vararg=0
4164 \n: .int \y
4165 .endm
4166 m x
4167 EOF
4168     # .altmacro is only used in arm asm
4169     ! enabled arm || check_as <<EOF || return 1
4170 .altmacro
4171 EOF
4172     enable gnu_as
4173     return 0
4174 }
4175
4176 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4177     nogas=:
4178     enabled_any arm aarch64 && nogas=die
4179     enabled_all ppc altivec && nogas=warn
4180     as_noop=-v
4181
4182     case $as_type in
4183         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4184         gcc)  gaspp_as_type=gas ;;
4185         *)    gaspp_as_type=$as_type ;;
4186     esac
4187
4188     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4189
4190     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4191         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4192
4193     if ! check_gas ; then
4194         as=${gas:=$as}
4195         check_gas || \
4196             $nogas "GNU assembler not found, install/update gas-preprocessor"
4197     fi
4198
4199     check_as <<EOF && enable as_func
4200 .func test
4201 .endfunc
4202 EOF
4203 fi
4204
4205 check_inline_asm inline_asm_labels '"1:\n"'
4206
4207 if enabled aarch64; then
4208     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4209     # internal assembler in clang 3.3 does not support this instruction
4210     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4211     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4212
4213     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4214
4215 elif enabled alpha; then
4216
4217     check_cflags -mieee
4218
4219 elif enabled arm; then
4220
4221     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4222     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4223     enabled thumb && check_cflags -mthumb || check_cflags -marm
4224
4225     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4226         enable vfp_args
4227     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4228         enable vfp_args
4229     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4230         case "${cross_prefix:-$cc}" in
4231             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4232             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4233 __asm__ (".eabi_attribute 28, 1");
4234 int main(void) { return 0; }
4235 EOF
4236         esac
4237         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4238     fi
4239
4240     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4241     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4242     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4243     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4244     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4245     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4246
4247     [ $target_os = linux ] || [ $target_os = android ] ||
4248         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4249             $ARCH_EXT_LIST_ARM
4250
4251     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4252
4253     check_as <<EOF && enable as_arch_directive
4254 .arch armv7-a
4255 EOF
4256     check_as <<EOF && enable as_fpu_directive
4257 .fpu neon
4258 EOF
4259
4260     # llvm's integrated assembler supports .object_arch from llvm 3.5
4261     [ "$objformat" = elf32 ] || [ "$objformat" = elf64 ] &&
4262         check_as <<EOF && enable as_object_arch
4263 .object_arch armv4
4264 EOF
4265
4266     # MS armasm fails to assemble our PIC constructs
4267     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4268
4269 elif enabled mips; then
4270
4271     # make sure that only one instruction set is enabled
4272     disable $ARCH_EXT_LIST_MIPS
4273
4274     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4275
4276     if enabled mips64; then
4277         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4278             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4279                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4280     else
4281         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4282             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4283                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4284     fi
4285
4286 elif enabled parisc; then
4287
4288     if enabled gcc; then
4289         case $($cc -dumpversion) in
4290             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4291         esac
4292     fi
4293
4294 elif enabled ppc; then
4295
4296     enable local_aligned_8 local_aligned_16 local_aligned_32
4297
4298     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4299     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4300     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4301     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4302
4303     if enabled altivec; then
4304         check_cflags -maltivec -mabi=altivec
4305
4306         # check if our compiler supports Motorola AltiVec C API
4307         check_code cc altivec.h "vector signed int v1 = (vector signed int) { 0 };
4308                                  vector signed int v2 = (vector signed int) { 1 };
4309                                  v1 = vec_add(v1, v2);" ||
4310             disable altivec
4311
4312         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4313     fi
4314
4315     if enabled vsx; then
4316         check_cflags -mvsx &&
4317         check_code cc altivec.h "int v[4] = { 0 };
4318                                  vector signed int v1 = vec_vsx_ld(0, v);" ||
4319             disable vsx
4320     fi
4321
4322     if enabled power8; then
4323         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4324     fi
4325
4326 elif enabled x86; then
4327
4328     check_builtin rdtsc    intrin.h   "__rdtsc()"
4329     check_builtin mm_empty mmintrin.h "_mm_empty()"
4330
4331     enable local_aligned_8 local_aligned_16 local_aligned_32
4332
4333     # check whether EBP is available on x86
4334     # As 'i' is stored on the stack, this program will crash
4335     # if the base pointer is used to access it because the
4336     # base pointer is cleared in the inline assembly code.
4337     check_exec_crash <<EOF && enable ebp_available
4338 volatile int i=0;
4339 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4340 return i;
4341 EOF
4342
4343     # check whether EBX is available on x86
4344     check_inline_asm ebx_available '""::"b"(0)' &&
4345         check_inline_asm ebx_available '"":::"%ebx"'
4346
4347     # check whether xmm clobbers are supported
4348     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4349
4350     # check whether binutils is new enough to compile SSSE3/MMXEXT
4351     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4352     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4353
4354     probe_x86asm(){
4355         x86asmexe_probe=$1
4356         if check_cmd $x86asmexe_probe -v; then
4357             x86asmexe=$x86asmexe_probe
4358             x86asm_type=nasm
4359             x86asm_debug="-g -F dwarf"
4360             X86ASMDEP=
4361             X86ASM_DEPFLAGS='-MD $(@:.o=.d)'
4362         elif check_cmd $x86asmexe_probe --version; then
4363             x86asmexe=$x86asmexe_probe
4364             x86asm_type=yasm
4365             x86asm_debug="-g dwarf2"
4366             X86ASMDEP='$(DEPX86ASM) $(X86ASMFLAGS) -M $(X86ASM_O) $< > $(@:.o=.d)'
4367             X86ASM_DEPFLAGS=
4368         fi
4369         check_x86asm "movbe ecx, [5]" && enable x86asm
4370     }
4371
4372     if ! disabled_any asm mmx x86asm; then
4373         disable x86asm
4374         for program in $x86asmexe nasm yasm; do
4375             probe_x86asm $program && break
4376         done
4377         disabled x86asm && die "nasm/yasm not found or too old. Use --disable-x86asm for a crippled build."
4378         X86ASMFLAGS="-f $objformat"
4379         enabled pic               && append X86ASMFLAGS "-DPIC"
4380         test -n "$extern_prefix"  && append X86ASMFLAGS "-DPREFIX"
4381         case "$objformat" in
4382             elf*) enabled debug && append X86ASMFLAGS $x86asm_debug ;;
4383         esac
4384
4385         check_x86asm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4386         check_x86asm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4387         check_x86asm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4388         check_x86asm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4389         check_x86asm "CPU amdnop"                      || disable cpunop
4390     fi
4391
4392     case "$cpu" in
4393         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4394             disable fast_clz
4395         ;;
4396     esac
4397
4398 fi
4399
4400 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4401
4402 check_ldflags -Wl,--as-needed
4403
4404 if ! disabled network; then
4405     check_func getaddrinfo $network_extralibs
4406     check_func inet_aton $network_extralibs
4407
4408     check_type netdb.h "struct addrinfo"
4409     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4410     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4411     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4412     check_type poll.h "struct pollfd"
4413     check_type netinet/sctp.h "struct sctp_event_subscribe"
4414     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4415     check_type netinet/in.h "struct sockaddr_in6"
4416     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4417     check_type "sys/types.h sys/socket.h" socklen_t
4418
4419     # Prefer arpa/inet.h over winsock2
4420     if check_header arpa/inet.h ; then
4421         check_func closesocket
4422     elif check_header winsock2.h ; then
4423         check_func_headers winsock2.h closesocket -lws2 &&
4424             network_extralibs="-lws2" ||
4425         { check_func_headers winsock2.h closesocket -lws2_32 &&
4426             network_extralibs="-lws2_32"; } || disable winsock2_h network
4427         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4428
4429         check_type ws2tcpip.h socklen_t
4430         check_type ws2tcpip.h "struct addrinfo"
4431         check_type ws2tcpip.h "struct group_source_req"
4432         check_type ws2tcpip.h "struct ip_mreq_source"
4433         check_type ws2tcpip.h "struct ipv6_mreq"
4434         check_type winsock2.h "struct pollfd"
4435         check_struct winsock2.h "struct sockaddr" sa_len
4436         check_type ws2tcpip.h "struct sockaddr_in6"
4437         check_type ws2tcpip.h "struct sockaddr_storage"
4438     else
4439         disable network
4440     fi
4441 fi
4442
4443 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4444 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4445 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4446 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4447
4448 case "$custom_allocator" in
4449     jemalloc)
4450         # jemalloc by default does not use a prefix
4451         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4452     ;;
4453     tcmalloc)
4454         require_pkg_config libtcmalloc libtcmalloc gperftools/tcmalloc.h tc_malloc
4455         malloc_prefix=tc_
4456     ;;
4457 esac
4458
4459 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4460 check_func  ${malloc_prefix}memalign            && enable memalign
4461 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4462
4463 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4464     { check_lib clock_gettime time.h clock_gettime ||
4465       check_lib clock_gettime time.h clock_gettime -lrt; }
4466
4467 check_func  fcntl
4468 check_func  gethrtime
4469 check_func  getopt
4470 check_func  getrusage
4471 check_func  gettimeofday
4472 check_func  gmtime_r
4473 check_func  isatty
4474 check_func  localtime_r
4475 check_func  mkstemp
4476 check_func  mmap
4477 check_func  mprotect
4478 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4479 check_func_headers time.h nanosleep || check_lib nanosleep time.h nanosleep -lrt
4480 check_func  sched_getaffinity
4481 check_func  setrlimit
4482 check_func  strerror_r
4483 check_func  sysconf
4484 check_func  sysctl
4485 check_func  usleep
4486
4487 check_func_headers io.h setmode
4488 check_func_headers mach/mach_time.h mach_absolute_time
4489 check_func_headers stdlib.h getenv
4490
4491 check_func_headers windows.h GetProcessAffinityMask
4492 check_func_headers windows.h GetProcessTimes
4493 check_func_headers windows.h GetSystemTimeAsFileTime
4494 check_func_headers windows.h LoadLibrary
4495 check_func_headers windows.h MapViewOfFile
4496 check_func_headers windows.h SetConsoleTextAttribute
4497 check_func_headers windows.h Sleep
4498 check_func_headers windows.h VirtualAlloc
4499 check_struct windows.h "CONDITION_VARIABLE" Ptr
4500
4501 check_header direct.h
4502 check_header dxgidebug.h
4503 check_header dxva.h
4504 check_header dxva2api.h
4505 check_header io.h
4506 check_header malloc.h
4507 check_header poll.h
4508 check_header sys/param.h
4509 check_header sys/resource.h
4510 check_header sys/select.h
4511 check_header sys/time.h
4512 check_header sys/un.h
4513 check_header unistd.h
4514 check_header valgrind/valgrind.h
4515 check_header VideoDecodeAcceleration/VDADecoder.h
4516 check_header windows.h
4517
4518 # it seems there are versions of clang in some distros that try to use the
4519 # gcc headers, which explodes for stdatomic
4520 # so we also check that atomics actually work here
4521 check_builtin stdatomic stdatomic.h "atomic_int foo; atomic_store(&foo, 0)"
4522
4523 check_lib ole32    "windows.h"            CoTaskMemFree        -lole32
4524 check_lib shell32  "windows.h shellapi.h" CommandLineToArgvW   -lshell32
4525 check_lib wincrypt "windows.h wincrypt.h" CryptGenRandom       -ladvapi32
4526 check_lib psapi    "windows.h psapi.h"    GetProcessMemoryInfo -lpsapi
4527
4528 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4529
4530 check_type "cuviddec.h" "CUVIDH264PICPARAMS"
4531 check_type "cuviddec.h" "CUVIDHEVCPICPARAMS"
4532 check_struct "cuviddec.h" "CUVIDDECODECREATEINFO" bitDepthMinus8
4533
4534 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4535 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4536 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4537
4538 check_type "va/va.h va/va_dec_hevc.h" "VAPictureParameterBufferHEVC"
4539 check_type "va/va.h va/va_dec_vp8.h" "VAPictureParameterBufferVP8"
4540 check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
4541 check_type "va/va.h va/va_enc_h264.h" "VAEncPictureParameterBufferH264"
4542 check_type "va/va.h va/va_enc_hevc.h" "VAEncPictureParameterBufferHEVC"
4543 check_type "va/va.h va/va_enc_jpeg.h" "VAEncPictureParameterBufferJPEG"
4544 check_type "va/va.h va/va_enc_mpeg2.h" "VAEncPictureParameterBufferMPEG2"
4545 check_type "va/va.h va/va_enc_vp8.h"  "VAEncPictureParameterBufferVP8"
4546 check_type "va/va.h va/va_enc_vp9.h"  "VAEncPictureParameterBufferVP9"
4547
4548 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4549
4550 if ! disabled w32threads && ! enabled pthreads; then
4551     check_lib w32threads "windows.h process.h" _beginthreadex
4552 fi
4553
4554 # check for some common methods of building with pthread support
4555 # do this before the optional library checks as some of them require pthreads
4556 if ! disabled pthreads && ! enabled w32threads; then
4557     if check_lib pthreads pthread.h pthread_join -pthread; then
4558         add_cflags -pthread
4559     elif check_lib pthreads pthread.h pthread_join -pthreads; then
4560         add_cflags -pthreads
4561     elif check_lib pthreads pthread.h pthread_join -lpthreadGC2; then
4562         :
4563     elif check_lib pthreads pthread.h pthread_join -lpthread; then
4564         :
4565     elif check_func pthread_join; then
4566         enable pthreads
4567     fi
4568 fi
4569
4570 enabled pthreads &&
4571     check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwait(s,0); sem_destroy(s)" $pthreads_extralibs
4572
4573 disabled  zlib || check_lib  zlib  zlib.h      zlibVersion -lz
4574 disabled bzlib || check_lib bzlib bzlib.h BZ2_bzlibVersion -lbz2
4575
4576 # On some systems dynamic loading requires no extra linker flags
4577 check_lib libdl dlfcn.h dlopen || check_lib libdl dlfcn.h dlopen -ldl
4578
4579 check_lib libm math.h sin -lm
4580
4581 atan2f_args=2
4582 ldexpf_args=2
4583 powf_args=2
4584
4585 for func in $MATH_FUNCS; do
4586     eval check_mathfunc $func \${${func}_args:-1} $libm_extralibs
4587 done
4588
4589 # these are off by default, so fail if requested and not available
4590 enabled avisynth          && require_header avisynth/avisynth_c.h
4591 enabled avxsynth          && require_header avxsynth/avxsynth_c.h
4592 enabled cuda              && require cuda cuda.h cuInit -lcuda
4593 enabled cuvid             && require cuvid cuviddec.h cuvidCreateDecoder -lnvcuvid
4594 enabled frei0r            && require_header frei0r.h
4595 enabled gnutls            && require_pkg_config gnutls gnutls gnutls/gnutls.h gnutls_global_init &&
4596                              check_lib gmp gmp.h mpz_export -lgmp
4597 enabled libbs2b           && require_pkg_config libbs2b libbs2b bs2b.h bs2b_open
4598 enabled libdc1394         && require_pkg_config libdc1394 libdc1394-2 dc1394/dc1394.h dc1394_new
4599 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4600 enabled libfaac           && require libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4601 enabled libfdk_aac        && require_pkg_config libfdk_aac fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4602 enabled libfontconfig     && require_pkg_config libfontconfig fontconfig "fontconfig/fontconfig.h" FcInit
4603 enabled libfreetype       && require_pkg_config libfreetype freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4604 enabled libgsm            && require libgsm gsm.h gsm_create -lgsm
4605 enabled libhdcd           && require_pkg_config libhdcd libhdcd "hdcd/hdcd_simple.h" hdcd_new
4606 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4607 enabled libkvazaar        && require_pkg_config libkvazaar "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4608 enabled libmfx            && require_pkg_config libmfx libmfx "mfx/mfxvideo.h" MFXInit
4609 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4610 enabled libnpp            && require libnpp npp.h nppGetLibVersion -lnppi -lnppc
4611 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4612 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4613 enabled libopencv         && require_pkg_config libopencv opencv opencv/cv.h cvCreateImageHeader
4614 enabled libopenh264       && require_pkg_config libopenh264 openh264 wels/codec_api.h WelsGetCodecVersion
4615 enabled libopenjpeg       && { check_lib libopenjpeg openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC ||
4616                                require_pkg_config libopenjpeg libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; }
4617 enabled libopus           && require_pkg_config libopus opus opus_multistream.h opus_multistream_decoder_create
4618 enabled libpulse          && require_pkg_config libpulse libpulse-simple pulse/simple.h pa_simple_new
4619 enabled librtmp           && require_pkg_config librtmp librtmp librtmp/rtmp.h RTMP_Socket
4620 enabled libschroedinger   && require_pkg_config libschroedinger schroedinger-1.0 schroedinger/schro.h schro_init
4621 enabled libsnappy         && require libsnappy snappy-c.h snappy_compress -lsnappy
4622 enabled libspeex          && require_pkg_config libspeex speex speex/speex.h speex_decoder_init
4623 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4624 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4625 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4626 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4627 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4628 enabled libvpx            && require_pkg_config libvpx "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version &&
4629                              { enabled libvpx_vp8_decoder &&
4630                                    check_pkg_config libvpx_vp8_decoder vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx
4631                                enabled libvpx_vp8_encoder &&
4632                                    check_pkg_config libvpx_vp8_encoder vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx
4633                                enabled libvpx_vp9_decoder &&
4634                                    check_pkg_config libvpx_vp9_decoder vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx
4635                                enabled libvpx_vp9_encoder &&
4636                                    check_pkg_config libvpx_vp9_encoder vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx
4637                                disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder &&
4638                                    die "libvpx enabled but no supported decoders/encoders found"
4639                              }
4640 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4641 enabled libwebp           && require_pkg_config libwebp libwebp webp/encode.h WebPGetEncoderVersion
4642 enabled libx264           && require_pkg_config libx264 x264 "stdint.h x264.h" x264_encoder_encode &&
4643                              require_cpp_condition x264.h "X264_BUILD >= 118" &&
4644                              { check_cpp_condition x264.h "X264_MPEG2" &&
4645                                enable libx262; }
4646 enabled libx265           && require_pkg_config libx265 x265 x265.h x265_api_get &&
4647                              require_cpp_condition x265.h "X265_BUILD >= 57"
4648 enabled libxavs           && require libxavs "stdint.h xavs.h" xavs_encoder_encode -lxavs
4649 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4650 enabled mmal              && { check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4651                                { ! enabled cross_compile &&
4652                                  add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline &&
4653                                  add_ldflags -L/opt/vc/lib/ &&
4654                                  check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host; } ||
4655                                die "ERROR: mmal not found" &&
4656                                check_func_headers interface/mmal/mmal.h "MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS"; }
4657 enabled nvenc             && require_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 6"
4658 enabled omx               && require_header OMX_Core.h
4659 enabled omx_rpi           && { check_header OMX_Core.h ||
4660                                { ! enabled cross_compile && add_cflags -isystem/opt/vc/include/IL && check_header OMX_Core.h ; } ||
4661                                die "ERROR: OpenMAX IL headers not found"; } && enable omx
4662 enabled openssl           && { { check_pkg_config openssl openssl openssl/ssl.h OPENSSL_init_ssl ||
4663                                  check_pkg_config openssl openssl openssl/ssl.h SSL_library_init; } ||
4664                                check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4665                                check_lib openssl openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4666                                check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4667                                die "ERROR: openssl not found"; }
4668
4669 # SDL adds some CFLAGS that should not be part of the general CFLAGS.
4670 enabled avplay &&
4671     test_pkg_config sdl "sdl >= 1.2.1 sdl < 1.3.0" SDL_events.h SDL_PollEvent
4672
4673 ! disabled pod2man   && check_cmd pod2man --help     && enable pod2man   || disable pod2man
4674 ! disabled texi2html && check_cmd texi2html -version && enable texi2html || disable texi2html
4675
4676 check_header linux/fb.h
4677 check_header linux/videodev2.h
4678 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4679
4680 check_header AVFoundation/AVFoundation.h
4681
4682 check_header sys/videoio.h
4683
4684 check_lib user32 "windows.h winuser.h" GetShellWindow -luser32
4685 check_lib vfw32 "windows.h vfw.h" capCreateCaptureWindow -lvfw32
4686 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4687 # w32api 3.12 had it defined wrong
4688 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4689
4690 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4691 check_header "dev/bktr/ioctl_meteor.h dev/bktr/ioctl_bt848.h"                   ||
4692     check_header "machine/ioctl_meteor.h machine/ioctl_bt848.h"                 ||
4693     check_header "dev/video/meteor/ioctl_meteor.h dev/video/bktr/ioctl_bt848.h" ||
4694     check_header "dev/ic/bt8xx.h"
4695
4696 check_header sys/soundcard.h
4697
4698 enabled alsa_indev &&
4699     check_lib alsa alsa/asoundlib.h snd_pcm_htimestamp -lasound
4700
4701 enabled libjack &&
4702     require_pkg_config libjack jack jack/jack.h jack_port_get_latency_range
4703
4704 enabled sndio_indev && check_lib sndio sndio.h sio_open -lsndio
4705
4706 if enabled libcdio; then
4707     check_lib libcdio "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4708     check_lib libcdio "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4709     die "ERROR: No usable libcdio/cdparanoia found"
4710 fi
4711
4712 if enabled libxcb; then
4713     require_pkg_config libxcb xcb xcb/xcb.h xcb_connect
4714     require_pkg_config libxcb_shape xcb-shape xcb/shape.h xcb_shape_rectangles
4715     disabled libxcb_shm ||
4716         check_pkg_config libxcb_shm xcb-shm xcb/shm.h xcb_shm_attach
4717     disabled libxcb_xfixes ||
4718         check_pkg_config libxcb_xfixes xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image
4719 fi
4720
4721 # d3d11va requires linking directly to dxgi and d3d11 if not building for
4722 # the desktop api partition
4723 check_cpp <<EOF && enable uwp && d3d11va_extralibs="-ldxgi -ld3d11"
4724 #ifdef WINAPI_FAMILY
4725 #include <winapifamily.h>
4726 #if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4727 #error desktop, not uwp
4728 #else
4729 // WINAPI_FAMILY_APP, WINAPI_FAMILY_PHONE_APP => UWP
4730 #endif
4731 #else
4732 #error no family set
4733 #endif
4734 EOF
4735
4736 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4737
4738 enabled vaapi &&
4739     check_code cc "va/va.h" "vaCreateSurfaces(0, 0, 0, 0, 0, 0, 0, 0)" ||
4740     disable vaapi
4741
4742 enabled vaapi &&
4743     check_lib vaapi_drm "va/va.h va/va_drm.h" vaGetDisplayDRM -lva -lva-drm
4744
4745 enabled vaapi &&
4746     check_lib vaapi_x11 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 -lX11
4747
4748 enabled vaapi &&
4749     check_cpp_condition "va/va.h" "VA_CHECK_VERSION(1, 0, 0)" &&
4750     enable vaapi_1
4751
4752 enabled vdpau &&
4753     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4754     disable vdpau
4755
4756 enabled vdpau &&
4757     check_lib vdpau_x11 "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau -lX11
4758
4759 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4760
4761 # add some useful compiler flags if supported
4762 check_cflags -Wdeclaration-after-statement
4763 check_cflags -Wall
4764 check_cflags -Wdisabled-optimization
4765 check_cflags -Wpointer-arith
4766 check_cflags -Wredundant-decls
4767 check_cflags -Wwrite-strings
4768 check_cflags -Wtype-limits
4769 check_cflags -Wundef
4770 check_cflags -Wmissing-prototypes
4771 check_cflags -Wstrict-prototypes
4772
4773 if enabled extra_warnings; then
4774     check_cflags -Wcast-qual
4775     check_cflags -Wextra
4776     check_cflags -Wpedantic
4777 fi
4778
4779 check_disable_warning(){
4780     warning_flag=-W${1#-Wno-}
4781     test_cflags $warning_flag && add_cflags $1
4782 }
4783
4784 check_disable_warning -Wno-parentheses
4785 check_disable_warning -Wno-switch
4786 check_disable_warning -Wno-format-zero-length
4787 check_disable_warning -Wno-pointer-sign
4788
4789 check_disable_warning_headers(){
4790     warning_flag=-W${1#-Wno-}
4791     test_cflags $warning_flag && add_cflags_headers $1
4792 }
4793
4794 check_disable_warning_headers -Wno-deprecated-declarations
4795 check_disable_warning_headers -Wno-unused-variable
4796
4797 check_objcflags -fobjc-arc && enable objc_arc
4798
4799 check_cc <<EOF && enable blocks_extension
4800 void (^block)(void);
4801 EOF
4802
4803 # add some linker flags
4804 check_ldflags -Wl,--warn-common
4805 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4806 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir && add_ldsoflags -Wl,-rpath,$libdir
4807 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
4808
4809 # add some strip flags
4810 # -wN '..@*' is more selective than -x, but not available everywhere.
4811 check_stripflags -wN \'..@*\' || check_stripflags -x || strip='true'
4812
4813 enabled neon_clobber_test &&
4814     check_ldflags -Wl,--wrap,avcodec_open2              \
4815                   -Wl,--wrap,avcodec_decode_audio4      \
4816                   -Wl,--wrap,avcodec_decode_video2      \
4817                   -Wl,--wrap,avcodec_decode_subtitle2   \
4818                   -Wl,--wrap,avcodec_encode_audio2      \
4819                   -Wl,--wrap,avcodec_encode_video2      \
4820                   -Wl,--wrap,avcodec_encode_subtitle    \
4821                   -Wl,--wrap,avcodec_send_packet        \
4822                   -Wl,--wrap,avcodec_receive_packet     \
4823                   -Wl,--wrap,avcodec_send_frame         \
4824                   -Wl,--wrap,avcodec_receive_frame      \
4825                   -Wl,--wrap,avresample_convert ||
4826     disable neon_clobber_test
4827
4828 enabled xmm_clobber_test &&
4829     check_ldflags -Wl,--wrap,avcodec_open2              \
4830                   -Wl,--wrap,avcodec_decode_audio4      \
4831                   -Wl,--wrap,avcodec_decode_video2      \
4832                   -Wl,--wrap,avcodec_decode_subtitle2   \
4833                   -Wl,--wrap,avcodec_encode_audio2      \
4834                   -Wl,--wrap,avcodec_encode_video2      \
4835                   -Wl,--wrap,avcodec_encode_subtitle    \
4836                   -Wl,--wrap,avcodec_send_packet        \
4837                   -Wl,--wrap,avcodec_receive_packet     \
4838                   -Wl,--wrap,avcodec_send_frame         \
4839                   -Wl,--wrap,avcodec_receive_frame      \
4840                   -Wl,--wrap,avresample_convert         \
4841                   -Wl,--wrap,sws_scale ||
4842     disable xmm_clobber_test
4843
4844 check_ld <<EOF && enable proper_dce
4845 extern const int array[512];
4846 static inline int func(void) { return array[0]; }
4847 int main(void) { return 0; }
4848 EOF
4849
4850 if enabled proper_dce; then
4851     echo "X { local: *; };" > $TMPV
4852     if test_ldflags -Wl,${version_script},$TMPV; then
4853         append SHFLAGS '-Wl,${version_script},\$(SUBDIR)lib\$(NAME).ver'
4854         check_cc <<EOF && enable symver_asm_label
4855 void ff_foo(void) __asm__ ("av_foo@VERSION");
4856 void ff_foo(void) { ${inline_asm+__asm__($quotes);} }
4857 EOF
4858         check_c