configure

   1 #!/bin/sh
   2 #
   3 # Libav configure script
   4 #
   5 # Copyright (c) 2000-2002 Fabrice Bellard
   6 # Copyright (c) 2005-2008 Diego Biurrun
   7 # Copyright (c) 2005-2008 Mans Rullgard
   8 #
   9
  10 # Prevent locale nonsense from breaking basic text processing.
  11 LC_ALL=C
  12 export LC_ALL
  13
  14 # make sure we are running under a compatible shell
  15 # try to make this part work with most shells
  16
  17 try_exec(){
  18     echo "Trying shell $1"
  19     type "$1" > /dev/null 2>&1 && exec "$@"
  20 }
  21
  22 unset foo
  23 (: ${foo%%bar}) 2> /dev/null
  24 E1="$?"
  25
  26 (: ${foo?}) 2> /dev/null
  27 E2="$?"
  28
  29 if test "$E1" != 0 || test "$E2" = 0; then
  30     echo "Broken shell detected.  Trying alternatives."
  31     export FF_CONF_EXEC
  32     if test "0$FF_CONF_EXEC" -lt 1; then
  33         FF_CONF_EXEC=1
  34         try_exec bash "$0" "$@"
  35     fi
  36     if test "0$FF_CONF_EXEC" -lt 2; then
  37         FF_CONF_EXEC=2
  38         try_exec ksh "$0" "$@"
  39     fi
  40     if test "0$FF_CONF_EXEC" -lt 3; then
  41         FF_CONF_EXEC=3
  42         try_exec /usr/xpg4/bin/sh "$0" "$@"
  43     fi
  44     echo "No compatible shell script interpreter found."
  45     echo "This configure script requires a POSIX-compatible shell"
  46     echo "such as bash or ksh."
  47     echo "THIS IS NOT A BUG IN LIBAV, DO NOT REPORT IT AS SUCH."
  48     echo "Instead, install a working POSIX-compatible shell."
  49     echo "Disabling this configure test will create a broken Libav."
  50     if test "$BASH_VERSION" = '2.04.0(1)-release'; then
  51         echo "This bash version ($BASH_VERSION) is broken on your platform."
  52         echo "Upgrade to a later version if available."
  53     fi
  54     exit 1
  55 fi
  56
  57 test -d /usr/xpg4/bin && PATH=/usr/xpg4/bin:$PATH
  58
  59 show_help(){
  60     cat <<EOF
  61 Usage: configure [options]
  62 Options: [defaults in brackets after descriptions]
  63
  64 Help options:
  65   --help                   print this message
  66   --list-decoders          show all available decoders
  67   --list-encoders          show all available encoders
  68   --list-hwaccels          show all available hardware accelerators
  69   --list-demuxers          show all available demuxers
  70   --list-muxers            show all available muxers
  71   --list-parsers           show all available parsers
  72   --list-protocols         show all available protocols
  73   --list-bsfs              show all available bitstream filters
  74   --list-indevs            show all available input devices
  75   --list-outdevs           show all available output devices
  76   --list-filters           show all available filters
  77
  78 Standard options:
  79   --logfile=FILE           log tests and output to FILE [config.log]
  80   --disable-logging        do not log configure debug information
  81   --prefix=PREFIX          install in PREFIX [$prefix]
  82   --bindir=DIR             install binaries in DIR [PREFIX/bin]
  83   --datadir=DIR            install data files in DIR [PREFIX/share/avconv]
  84   --docdir=DIR             install documentation in DIR [PREFIX/share/doc/libav]
  85   --libdir=DIR             install libs in DIR [PREFIX/lib]
  86   --shlibdir=DIR           install shared libs in DIR [PREFIX/lib]
  87   --incdir=DIR             install includes in DIR [PREFIX/include]
  88   --mandir=DIR             install man page in DIR [PREFIX/share/man]
  89   --enable-rpath           use rpath when linking programs [USE WITH CARE]
  90
  91 Licensing options:
  92   --enable-gpl             allow use of GPL code, the resulting libs
  93                            and binaries will be under GPL [no]
  94   --enable-version3        upgrade (L)GPL to version 3 [no]
  95   --enable-nonfree         allow use of nonfree code, the resulting libs
  96                            and binaries will be unredistributable [no]
  97
  98 Configuration options:
  99   --disable-static         do not build static libraries [no]
 100   --enable-shared          build shared libraries [no]
 101   --enable-small           optimize for size instead of speed
 102   --enable-runtime-cpudetect detect cpu capabilities at runtime (bigger binary)
 103   --enable-gray            enable full grayscale support (slower color)
 104   --disable-swscale-alpha  disable alpha channel support in swscale
 105   --disable-all            disable building components, libraries and programs
 106
 107 Program options:
 108   --disable-programs       do not build command line programs
 109   --disable-avconv         disable avconv build
 110   --disable-avplay         disable avplay build
 111   --disable-avprobe        disable avprobe build
 112   --disable-avserver       deprecated, does nothing
 113
 114 Component options:
 115   --disable-doc            do not build documentation
 116   --disable-avdevice       disable libavdevice build
 117   --disable-avcodec        disable libavcodec build
 118   --disable-avformat       disable libavformat build
 119   --disable-avutil         disable libavutil build
 120   --disable-swscale        disable libswscale build
 121   --disable-avfilter       disable video filter support [no]
 122   --disable-avresample     disable libavresample build [no]
 123   --disable-pthreads       disable pthreads [auto]
 124   --disable-w32threads     disable Win32 threads [auto]
 125   --disable-network        disable network support [no]
 126   --disable-dct            disable DCT code
 127   --disable-error-resilience disable error resilience code
 128   --disable-lsp            disable LSP code
 129   --disable-lzo            disable LZO decoder code
 130   --disable-mdct           disable MDCT code
 131   --disable-rdft           disable RDFT code
 132   --disable-fft            disable FFT code
 133   --disable-faan           disable floating point AAN (I)DCT code
 134
 135 Hardware accelerators:
 136   --enable-d3d11va         enable D3D11VA code
 137   --enable-dxva2           enable DXVA2 code
 138   --enable-vaapi           enable VAAPI code
 139   --enable-vda             enable VDA code
 140   --enable-vdpau           enable VDPAU code
 141
 142 Individual component options:
 143   --disable-everything     disable all components listed below
 144   --disable-encoder=NAME   disable encoder NAME
 145   --enable-encoder=NAME    enable encoder NAME
 146   --disable-encoders       disable all encoders
 147   --disable-decoder=NAME   disable decoder NAME
 148   --enable-decoder=NAME    enable decoder NAME
 149   --disable-decoders       disable all decoders
 150   --disable-hwaccel=NAME   disable hwaccel NAME
 151   --enable-hwaccel=NAME    enable hwaccel NAME
 152   --disable-hwaccels       disable all hwaccels
 153   --disable-muxer=NAME     disable muxer NAME
 154   --enable-muxer=NAME      enable muxer NAME
 155   --disable-muxers         disable all muxers
 156   --disable-demuxer=NAME   disable demuxer NAME
 157   --enable-demuxer=NAME    enable demuxer NAME
 158   --disable-demuxers       disable all demuxers
 159   --enable-parser=NAME     enable parser NAME
 160   --disable-parser=NAME    disable parser NAME
 161   --disable-parsers        disable all parsers
 162   --enable-bsf=NAME        enable bitstream filter NAME
 163   --disable-bsf=NAME       disable bitstream filter NAME
 164   --disable-bsfs           disable all bitstream filters
 165   --enable-protocol=NAME   enable protocol NAME
 166   --disable-protocol=NAME  disable protocol NAME
 167   --disable-protocols      disable all protocols
 168   --enable-indev=NAME      enable input device NAME
 169   --disable-indev=NAME     disable input device NAME
 170   --disable-indevs         disable input devices
 171   --enable-outdev=NAME     enable output device NAME
 172   --disable-outdev=NAME    disable output device NAME
 173   --disable-outdevs        disable output devices
 174   --disable-devices        disable all devices
 175   --enable-filter=NAME     enable filter NAME
 176   --disable-filter=NAME    disable filter NAME
 177   --disable-filters        disable all filters
 178
 179 External library support:
 180   --enable-avisynth        enable reading of AviSynth script files [no]
 181   --enable-bzlib           enable bzlib [autodetect]
 182   --enable-frei0r          enable frei0r video filtering
 183   --enable-gnutls          enable gnutls [no]
 184   --enable-libbs2b         enable bs2b DSP library [no]
 185   --enable-libcdio         enable audio CD grabbing with libcdio
 186   --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394
 187                            and libraw1394 [no]
 188   --enable-libdcadec       enable DCA decoding via libdcadec [no]
 189   --enable-libfaac         enable AAC encoding via libfaac [no]
 190   --enable-libfdk-aac      enable AAC de/encoding via libfdk-aac [no]
 191   --enable-libfreetype     enable libfreetype [no]
 192   --enable-libgsm          enable GSM de/encoding via libgsm [no]
 193   --enable-libilbc         enable iLBC de/encoding via libilbc [no]
 194   --enable-libkvazaar      enable HEVC encoding via libkvazaar [no]
 195   --enable-libmfx          enable HW acceleration through libmfx
 196   --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
 197   --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
 198   --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
 199   --enable-libopencv       enable video filtering via libopencv [no]
 200   --enable-libopenh264     enable H.264 encoding via OpenH264 [no]
 201   --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]
 202   --enable-libopus         enable Opus de/encoding via libopus [no]
 203   --enable-libpulse        enable Pulseaudio input via libpulse [no]
 204   --enable-librtmp         enable RTMP[E] support via librtmp [no]
 205   --enable-libschroedinger enable Dirac de/encoding via libschroedinger [no]
 206   --enable-libsnappy       enable Snappy compression [no]
 207   --enable-libspeex        enable Speex de/encoding via libspeex [no]
 208   --enable-libtheora       enable Theora encoding via libtheora [no]
 209   --enable-libtwolame      enable MP2 encoding via libtwolame [no]
 210   --enable-libvo-aacenc    enable AAC encoding via libvo-aacenc [no]
 211   --enable-libvo-amrwbenc  enable AMR-WB encoding via libvo-amrwbenc [no]
 212   --enable-libvorbis       enable Vorbis encoding via libvorbis [no]
 213   --enable-libvpx          enable VP8 and VP9 de/encoding via libvpx [no]
 214   --enable-libwavpack      enable wavpack encoding via libwavpack [no]
 215   --enable-libwebp         enable WebP encoding via libwebp [no]
 216   --enable-libx264         enable H.264 encoding via x264 [no]
 217   --enable-libx265         enable HEVC encoding via x265 [no]
 218   --enable-libxavs         enable AVS encoding via xavs [no]
 219   --enable-libxcb          enable X11 grabbing using XCB [no]
 220   --enable-libxcb-shm      enable X11 grabbing shm communication [auto]
 221   --enable-libxcb-xfixes   enable X11 grabbing mouse rendering [auto]
 222   --enable-libxvid         enable Xvid encoding via xvidcore,
 223                            native MPEG-4/Xvid encoder exists [no]
 224   --enable-mmal            enable decoding via MMAL [no]
 225   --enable-nvenc           enable encoding via NVENC [no]
 226   --enable-openssl         enable openssl [no]
 227   --enable-x11grab         enable X11 grabbing (legacy) [no]
 228   --enable-zlib            enable zlib [autodetect]
 229
 230 Toolchain options:
 231   --arch=ARCH              select architecture [$arch]
 232   --cpu=CPU                select the minimum required CPU (affects
 233                            instruction selection, may crash on older CPUs)
 234   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
 235   --enable-cross-compile   assume a cross-compiler is used
 236   --sysroot=PATH           root of cross-build tree
 237   --sysinclude=PATH        location of cross-build system headers
 238   --target-os=OS           compiler targets OS [$target_os]
 239   --target-exec=CMD        command to run executables on target
 240   --target-path=DIR        path to view of build directory on target
 241   --target-samples=DIR     path to samples directory on target
 242   --toolchain=NAME         set tool defaults according to NAME
 243   --nm=NM                  use nm tool
 244   --ar=AR                  use archive tool AR [$ar_default]
 245   --as=AS                  use assembler AS [$as_default]
 246   --cc=CC                  use C compiler CC [$cc_default]
 247   --objcc=OCC              use ObjC compiler OCC [$cc_default]
 248   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
 249   --ld=LD                  use linker LD
 250   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
 251   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
 252   --host-cc=HOSTCC         use host C compiler HOSTCC
 253   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
 254   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
 255   --host-ld=HOSTLD         use host linker HOSTLD
 256   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
 257   --host-libs=HLIBS        use libs HLIBS when linking for host
 258   --host-os=OS             compiler host OS [$target_os]
 259   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
 260   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
 261   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
 262   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
 263   --extra-libs=ELIBS       add ELIBS [$ELIBS]
 264   --extra-version=STRING   version string suffix []
 265   --optflags=OPTFLAGS      override optimization-related compiler flags
 266   --build-suffix=SUFFIX    library name suffix []
 267   --enable-pic             build position-independent code
 268   --enable-thumb           compile for Thumb instruction set
 269   --enable-lto             use link-time optimization
 270   --env="ENV=override"     override the environment variables
 271
 272 Advanced options (experts only):
 273   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
 274   --custom-allocator=NAME  use a supported custom allocator
 275   --disable-symver         disable symbol versioning
 276   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
 277   --disable-safe-bitstream-reader
 278                            disable buffer boundary checking in bitreaders
 279                            (faster, but may crash)
 280   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
 281   --enable-sram            allow use of on-chip SRAM
 282
 283 Optimization options (experts only):
 284   --disable-asm            disable all assembly optimizations
 285   --disable-altivec        disable AltiVec optimizations
 286   --disable-vsx            disable VSX optimizations
 287   --disable-power8         disable POWER8 optimizations
 288   --disable-amd3dnow       disable 3DNow! optimizations
 289   --disable-amd3dnowext    disable 3DNow! extended optimizations
 290   --disable-mmx            disable MMX optimizations
 291   --disable-mmxext         disable MMXEXT optimizations
 292   --disable-sse            disable SSE optimizations
 293   --disable-sse2           disable SSE2 optimizations
 294   --disable-sse3           disable SSE3 optimizations
 295   --disable-ssse3          disable SSSE3 optimizations
 296   --disable-sse4           disable SSE4 optimizations
 297   --disable-sse42          disable SSE4.2 optimizations
 298   --disable-avx            disable AVX optimizations
 299   --disable-xop            disable XOP optimizations
 300   --disable-fma3           disable FMA3 optimizations
 301   --disable-fma4           disable FMA4 optimizations
 302   --disable-avx2           disable AVX2 optimizations
 303   --disable-armv5te        disable armv5te optimizations
 304   --disable-armv6          disable armv6 optimizations
 305   --disable-armv6t2        disable armv6t2 optimizations
 306   --disable-vfp            disable VFP optimizations
 307   --disable-neon           disable NEON optimizations
 308   --disable-inline-asm     disable use of inline assembly
 309   --disable-yasm           disable use of nasm/yasm assembly
 310
 311 Developer options (useful when working on Libav itself):
 312   --disable-debug          disable debugging symbols
 313   --enable-debug=LEVEL     set the debug level [$debuglevel]
 314   --disable-optimizations  disable compiler optimizations
 315   --enable-extra-warnings  enable more compiler warnings
 316   --samples=PATH           location of test samples for FATE, if not set use
 317                            \$LIBAV_SAMPLES at make invocation time.
 318   --enable-neon-clobber-test check NEON registers for clobbering (should be
 319                            used only for debugging purposes)
 320   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
 321                            should be used only for debugging purposes)
 322   --enable-random          randomly enable/disable components
 323   --disable-random
 324   --enable-random=LIST     randomly enable/disable specific components or
 325   --disable-random=LIST    component groups. LIST is a comma-separated list
 326                            of NAME[:PROB] entries where NAME is a component
 327                            (group) and PROB the probability associated with
 328                            NAME (default 0.5).
 329   --random-seed=VALUE      seed value for --enable/disable-random
 330   --disable-valgrind-backtrace do not print a backtrace under Valgrind
 331                            (only applies to --disable-optimizations builds)
 332
 333 NOTE: Object files are built at the place where configure is launched.
 334 EOF
 335   exit 0
 336 }
 337
 338 quotes='""'
 339
 340 log(){
 341     echo "$@" >> $logfile
 342 }
 343
 344 log_file(){
 345     log BEGIN $1
 346     i=1
 347     while read line; do
 348         printf '%5s   %s\n' "${i}" "${line}"
 349         i=$(($i+1))
 350     done < $1 >> $logfile
 351     log END $1
 352 }
 353
 354 echolog(){
 355     log "$@"
 356     echo "$@"
 357 }
 358
 359 warn(){
 360     log "WARNING: $*"
 361     WARNINGS="${WARNINGS}WARNING: $*\n"
 362 }
 363
 364 die(){
 365     echolog "$@"
 366     cat <<EOF
 367
 368 If you think configure made a mistake, make sure you are using the latest
 369 version from Git.  If the latest version fails, report the problem to the
 370 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
 371 EOF
 372     if disabled logging; then
 373         cat <<EOF
 374 Rerun configure with logging enabled (do not use --disable-logging), and
 375 include the log this produces with your report.
 376 EOF
 377     else
 378         cat <<EOF
 379 Include the log file "$logfile" produced by configure as this will help
 380 solving the problem.
 381 EOF
 382     fi
 383     exit 1
 384 }
 385
 386 # Avoid locale weirdness, besides we really just want to translate ASCII.
 387 toupper(){
 388     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
 389 }
 390
 391 tolower(){
 392     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
 393 }
 394
 395 c_escape(){
 396     echo "$*" | sed 's/["\\]/\\\0/g'
 397 }
 398
 399 sh_quote(){
 400     v=$(echo "$1" | sed "s/'/'\\\\''/g")
 401     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
 402     echo "$v"
 403 }
 404
 405 cleanws(){
 406     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
 407 }
 408
 409 filter(){
 410     pat=$1
 411     shift
 412     for v; do
 413         eval "case $v in $pat) echo $v ;; esac"
 414     done
 415 }
 416
 417 filter_out(){
 418     pat=$1
 419     shift
 420     for v; do
 421         eval "case $v in $pat) ;; *) echo $v ;; esac"
 422     done
 423 }
 424
 425 map(){
 426     m=$1
 427     shift
 428     for v; do eval $m; done
 429 }
 430
 431 add_suffix(){
 432     suffix=$1
 433     shift
 434     for v; do echo ${v}${suffix}; done
 435 }
 436
 437 set_all(){
 438     value=$1
 439     shift
 440     for var in $*; do
 441         eval $var=$value
 442     done
 443 }
 444
 445 set_weak(){
 446     value=$1
 447     shift
 448     for var; do
 449         eval : \${$var:=$value}
 450     done
 451 }
 452
 453 sanitize_var_name(){
 454     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
 455 }
 456
 457 set_safe(){
 458     var=$1
 459     shift
 460     eval $(sanitize_var_name "$var")='$*'
 461 }
 462
 463 get_safe(){
 464     eval echo \$$(sanitize_var_name "$1")
 465 }
 466
 467 pushvar(){
 468     for pvar in $*; do
 469         eval level=\${${pvar}_level:=0}
 470         eval ${pvar}_${level}="\$$pvar"
 471         eval ${pvar}_level=$(($level+1))
 472     done
 473 }
 474
 475 popvar(){
 476     for pvar in $*; do
 477         eval level=\${${pvar}_level:-0}
 478         test $level = 0 && continue
 479         eval level=$(($level-1))
 480         eval $pvar="\${${pvar}_${level}}"
 481         eval ${pvar}_level=$level
 482         eval unset ${pvar}_${level}
 483     done
 484 }
 485
 486 enable(){
 487     set_all yes $*
 488 }
 489
 490 disable(){
 491     set_all no $*
 492 }
 493
 494 enable_weak(){
 495     set_weak yes $*
 496 }
 497
 498 disable_weak(){
 499     set_weak no $*
 500 }
 501
 502 enable_safe(){
 503     for var; do
 504         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
 505     done
 506 }
 507
 508 disable_safe(){
 509     for var; do
 510         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
 511     done
 512 }
 513
 514 do_enable_deep(){
 515     for var; do
 516         enabled $var && continue
 517         eval sel="\$${var}_select"
 518         eval sgs="\$${var}_suggest"
 519         pushvar var sgs
 520         enable_deep $sel
 521         popvar sgs
 522         enable_deep_weak $sgs
 523         popvar var
 524     done
 525 }
 526
 527 enable_deep(){
 528     do_enable_deep $*
 529     enable $*
 530 }
 531
 532 enable_deep_weak(){
 533     for var; do
 534         disabled $var && continue
 535         pushvar var
 536         do_enable_deep $var
 537         popvar var
 538         enable_weak $var
 539     done
 540 }
 541
 542 enabled(){
 543     test "${1#!}" = "$1" && op== || op=!=
 544     eval test "x\$${1#!}" $op "xyes"
 545 }
 546
 547 disabled(){
 548     test "${1#!}" = "$1" && op== || op=!=
 549     eval test "x\$${1#!}" $op "xno"
 550 }
 551
 552 enabled_all(){
 553     for opt; do
 554         enabled $opt || return 1
 555     done
 556 }
 557
 558 disabled_all(){
 559     for opt; do
 560         disabled $opt || return 1
 561     done
 562 }
 563
 564 enabled_any(){
 565     for opt; do
 566         enabled $opt && return 0
 567     done
 568 }
 569
 570 disabled_any(){
 571     for opt; do
 572         disabled $opt && return 0
 573     done
 574     return 1
 575 }
 576
 577 set_default(){
 578     for opt; do
 579         eval : \${$opt:=\$${opt}_default}
 580     done
 581 }
 582
 583 is_in(){
 584     value=$1
 585     shift
 586     for var in $*; do
 587         [ $var = $value ] && return 0
 588     done
 589     return 1
 590 }
 591
 592 do_check_deps(){
 593     for cfg; do
 594         cfg="${cfg#!}"
 595         enabled ${cfg}_checking && die "Circular dependency for $cfg."
 596         disabled ${cfg}_checking && continue
 597         enable ${cfg}_checking
 598         append allopts $cfg
 599
 600         eval dep_all="\$${cfg}_deps"
 601         eval dep_any="\$${cfg}_deps_any"
 602         eval dep_sel="\$${cfg}_select"
 603         eval dep_sgs="\$${cfg}_suggest"
 604         eval dep_ifa="\$${cfg}_if"
 605         eval dep_ifn="\$${cfg}_if_any"
 606
 607         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
 608         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
 609         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
 610
 611         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
 612         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
 613         enabled_all  $dep_all || disable $cfg
 614         enabled_any  $dep_any || disable $cfg
 615         disabled_any $dep_sel && disable $cfg
 616
 617         if enabled $cfg; then
 618             enable_deep $dep_sel
 619             enable_deep_weak $dep_sgs
 620         fi
 621
 622         disable ${cfg}_checking
 623     done
 624 }
 625
 626 check_deps(){
 627     unset allopts
 628
 629     do_check_deps "$@"
 630
 631     for cfg in $allopts; do
 632         enabled $cfg || continue
 633         eval dep_extralibs="\$${cfg}_extralibs"
 634         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
 635     done
 636 }
 637
 638 print_config(){
 639     pfx=$1
 640     files=$2
 641     shift 2
 642     map 'eval echo "$v \${$v:-no}"' "$@" |
 643     awk "BEGIN { split(\"$files\", files) }
 644         {
 645             c = \"$pfx\" toupper(\$1);
 646             v = \$2;
 647             sub(/yes/, 1, v);
 648             sub(/no/,  0, v);
 649             for (f in files) {
 650                 file = files[f];
 651                 if (file ~ /\\.h\$/) {
 652                     printf(\"#define %s %d\\n\", c, v) >>file;
 653                 } else if (file ~ /\\.asm\$/) {
 654                     printf(\"%%define %s %d\\n\", c, v) >>file;
 655                 } else if (file ~ /\\.mak\$/) {
 656                     n = -v ? \"\" : \"!\";
 657                     printf(\"%s%s=yes\\n\", n, c) >>file;
 658                 }
 659             }
 660         }"
 661 }
 662
 663 print_enabled(){
 664     suf=$1
 665     shift
 666     for v; do
 667         enabled $v && printf "%s\n" ${v%$suf};
 668     done
 669 }
 670
 671 append(){
 672     var=$1
 673     shift
 674     eval "$var=\"\$$var $*\""
 675 }
 676
 677 prepend(){
 678     var=$1
 679     shift
 680     eval "$var=\"$* \$$var\""
 681 }
 682
 683 unique(){
 684     var=$1
 685     uniq_list=""
 686     for tok in $(eval echo \$$var); do
 687         uniq_list="$(filter_out $tok $uniq_list) $tok"
 688     done
 689     eval "$var=\"${uniq_list}\""
 690 }
 691
 692 add_cppflags(){
 693     append CPPFLAGS "$@"
 694 }
 695
 696 add_cflags(){
 697     append CFLAGS $($cflags_filter "$@")
 698 }
 699
 700 add_asflags(){
 701     append ASFLAGS $($asflags_filter "$@")
 702 }
 703
 704 add_objcflags(){
 705     append OBJCFLAGS $($objcflags_filter "$@")
 706 }
 707
 708 add_ldflags(){
 709     append LDFLAGS $($ldflags_filter "$@")
 710 }
 711
 712 add_ldexeflags(){
 713     append LDEXEFLAGS $($ldflags_filter "$@")
 714 }
 715
 716 add_stripflags(){
 717     append STRIPFLAGS "$@"
 718 }
 719
 720 add_extralibs(){
 721     prepend extralibs $($ldflags_filter "$@")
 722 }
 723
 724 add_host_cppflags(){
 725     append host_cppflags "$@"
 726 }
 727
 728 add_host_cflags(){
 729     append host_cflags $($host_cflags_filter "$@")
 730 }
 731
 732 add_host_ldflags(){
 733     append host_ldflags $($host_ldflags_filter "$@")
 734 }
 735
 736 add_compat(){
 737     append compat_objs $1
 738     shift
 739     map 'add_cppflags -D$v' "$@"
 740 }
 741
 742 check_cmd(){
 743     log "$@"
 744     "$@" >> $logfile 2>&1
 745 }
 746
 747 cc_o(){
 748     eval printf '%s\\n' $CC_O
 749 }
 750
 751 cc_e(){
 752     eval printf '%s\\n' $CC_E
 753 }
 754
 755 check_cc(){
 756     log check_cc "$@"
 757     cat > $TMPC
 758     log_file $TMPC
 759     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
 760 }
 761
 762 check_objcc(){
 763     log check_objcc "$@"
 764     cat > $TMPC
 765     log_file $TMPC
 766     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
 767 }
 768
 769 check_cpp(){
 770     log check_cpp "$@"
 771     cat > $TMPC
 772     log_file $TMPC
 773     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
 774 }
 775
 776 as_o(){
 777     eval printf '%s\\n' $AS_O
 778 }
 779
 780 check_as(){
 781     log check_as "$@"
 782     cat > $TMPS
 783     log_file $TMPS
 784     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
 785 }
 786
 787 check_inline_asm(){
 788     log check_inline_asm "$@"
 789     name="$1"
 790     code="$2"
 791     shift 2
 792     disable $name
 793     check_cc "$@" <<EOF && enable $name
 794 void foo(void){ __asm__ volatile($code); }
 795 EOF
 796 }
 797
 798 check_insn(){
 799     log check_insn "$@"
 800     check_inline_asm ${1}_inline "\"$2\""
 801     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
 802 }
 803
 804 check_yasm(){
 805     log check_yasm "$@"
 806     echo "$1" > $TMPS
 807     log_file $TMPS
 808     shift 1
 809     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
 810 }
 811
 812 ld_o(){
 813     eval printf '%s\\n' $LD_O
 814 }
 815
 816 check_ld(){
 817     log check_ld "$@"
 818     flags=$(filter_out '-l*' "$@")
 819     libs=$(filter '-l*' "$@")
 820     check_cc $($cflags_filter $flags) || return
 821     flags=$($ldflags_filter $flags)
 822     libs=$($ldflags_filter $libs)
 823     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
 824 }
 825
 826 print_include(){
 827     hdr=$1
 828     test "${hdr%.h}" = "${hdr}" &&
 829         echo "#include $hdr"    ||
 830         echo "#include <$hdr>"
 831 }
 832
 833 check_code(){
 834     log check_code "$@"
 835     check=$1
 836     headers=$2
 837     code=$3
 838     shift 3
 839     {
 840         for hdr in $headers; do
 841             print_include $hdr
 842         done
 843         echo "int main(void) { $code; return 0; }"
 844     } | check_$check "$@"
 845 }
 846
 847 check_cppflags(){
 848     log check_cppflags "$@"
 849     check_cc "$@" <<EOF && append CPPFLAGS "$@"
 850 int x;
 851 EOF
 852 }
 853
 854 test_cflags(){
 855     log test_cflags "$@"
 856     set -- $($cflags_filter "$@")
 857     check_cc "$@" <<EOF
 858 int x;
 859 EOF
 860 }
 861
 862 check_cflags(){
 863     log check_cflags "$@"
 864     test_cflags "$@" && add_cflags "$@"
 865 }
 866
 867 test_objcflags(){
 868     log test_cflags "$@"
 869     set -- $($cflags_filter "$@")
 870     check_objcc "$@" <<EOF
 871 int x;
 872 EOF
 873 }
 874
 875 check_objcflags(){
 876     log check_cflags "$@"
 877     test_objcflags "$@" && add_objcflags "$@"
 878 }
 879
 880 test_ldflags(){
 881     log test_ldflags "$@"
 882     check_ld "$@" <<EOF
 883 int main(void){ return 0; }
 884 EOF
 885 }
 886
 887 check_ldflags(){
 888     log check_ldflags "$@"
 889     test_ldflags "$@" && add_ldflags "$@"
 890 }
 891
 892 test_stripflags(){
 893     log test_stripflags "$@"
 894     # call check_cc to get a fresh TMPO
 895     check_cc <<EOF
 896 int main(void) { return 0; }
 897 EOF
 898     check_cmd $strip $STRIPFLAGS "$@" $TMPO
 899 }
 900
 901 check_stripflags(){
 902     log check_stripflags "$@"
 903     test_stripflags "$@" && add_stripflags "$@"
 904 }
 905
 906 check_header(){
 907     log check_header "$@"
 908     header=$1
 909     shift
 910     disable_safe $header
 911     check_cpp "$@" <<EOF && enable_safe $header
 912 #include <$header>
 913 int x;
 914 EOF
 915 }
 916
 917 check_func(){
 918     log check_func "$@"
 919     func=$1
 920     shift
 921     disable $func
 922     check_ld "$@" <<EOF && enable $func
 923 extern int $func();
 924 int main(void){ $func(); }
 925 EOF
 926 }
 927
 928 check_mathfunc(){
 929     log check_mathfunc "$@"
 930     func=$1
 931     narg=$2
 932     shift 2
 933     test $narg = 2 && args="f, g" || args="f"
 934     disable $func
 935     check_ld "$@" <<EOF && enable $func
 936 #include <math.h>
 937 float foo(float f, float g) { return $func($args); }
 938 int main(void){ return 0; }
 939 EOF
 940 }
 941
 942 check_func_headers(){
 943     log check_func_headers "$@"
 944     headers=$1
 945     funcs=$2
 946     shift 2
 947     {
 948         for hdr in $headers; do
 949             print_include $hdr
 950         done
 951         for func in $funcs; do
 952             echo "long check_$func(void) { return (long) $func; }"
 953         done
 954         echo "int main(void) { return 0; }"
 955     } | check_ld "$@" && enable $funcs && enable_safe $headers
 956 }
 957
 958 check_cpp_condition(){
 959     log check_cpp_condition "$@"
 960     header=$1
 961     condition=$2
 962     shift 2
 963     check_cpp "$@" <<EOF
 964 #include <$header>
 965 #if !($condition)
 966 #error "unsatisfied condition: $condition"
 967 #endif
 968 EOF
 969 }
 970
 971 check_lib(){
 972     log check_lib "$@"
 973     header="$1"
 974     func="$2"
 975     shift 2
 976     check_header $header && check_func $func "$@" && add_extralibs "$@"
 977 }
 978
 979 check_lib2(){
 980     log check_lib2 "$@"
 981     headers="$1"
 982     funcs="$2"
 983     shift 2
 984     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
 985 }
 986
 987 check_pkg_config(){
 988     log check_pkg_config "$@"
 989     pkg="$1"
 990     headers="$2"
 991     funcs="$3"
 992     shift 3
 993     check_cmd $pkg_config --exists --print-errors $pkg || return
 994     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
 995     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
 996     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
 997         set_safe "${pkg}_cflags" $pkg_cflags   &&
 998         set_safe "${pkg}_libs"   $pkg_libs
 999 }
1000
1001 check_exec(){
1002     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1003 }
1004
1005 check_exec_crash(){
1006     code=$(cat)
1007
1008     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1009     # are safe but may not be available everywhere.  Thus we use
1010     # raise(SIGTERM) instead.  The check is run in a subshell so we
1011     # can redirect the "Terminated" message from the shell.  SIGBUS
1012     # is not defined by standard C so it is used conditionally.
1013
1014     (check_exec "$@") >> $logfile 2>&1 <<EOF
1015 #include <signal.h>
1016 static void sighandler(int sig){
1017     raise(SIGTERM);
1018 }
1019 int foo(void){
1020     $code
1021 }
1022 int (*func_ptr)(void) = foo;
1023 int main(void){
1024     signal(SIGILL, sighandler);
1025     signal(SIGFPE, sighandler);
1026     signal(SIGSEGV, sighandler);
1027 #ifdef SIGBUS
1028     signal(SIGBUS, sighandler);
1029 #endif
1030     return func_ptr();
1031 }
1032 EOF
1033 }
1034
1035 check_type(){
1036     log check_type "$@"
1037     headers=$1
1038     type=$2
1039     shift 2
1040     disable_safe "$type"
1041     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1042 }
1043
1044 check_struct(){
1045     log check_struct "$@"
1046     headers=$1
1047     struct=$2
1048     member=$3
1049     shift 3
1050     disable_safe "${struct}_${member}"
1051     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1052         enable_safe "${struct}_${member}"
1053 }
1054
1055 check_builtin(){
1056     log check_builtin "$@"
1057     name=$1
1058     headers=$2
1059     builtin=$3
1060     shift 3
1061     disable "$name"
1062     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1063 }
1064
1065 check_compile_assert(){
1066     log check_compile_assert "$@"
1067     name=$1
1068     headers=$2
1069     condition=$3
1070     shift 3
1071     disable "$name"
1072     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1073 }
1074
1075 require(){
1076     name="$1"
1077     header="$2"
1078     func="$3"
1079     shift 3
1080     check_lib $header $func "$@" || die "ERROR: $name not found"
1081 }
1082
1083 require2(){
1084     name="$1"
1085     headers="$2"
1086     func="$3"
1087     shift 3
1088     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1089 }
1090
1091 require_pkg_config(){
1092     pkg="$1"
1093     check_pkg_config "$@" || die "ERROR: $pkg not found"
1094     add_cflags    $(get_safe "${pkg}_cflags")
1095     add_extralibs $(get_safe "${pkg}_libs")
1096 }
1097
1098 hostcc_e(){
1099     eval printf '%s\\n' $HOSTCC_E
1100 }
1101
1102 hostcc_o(){
1103     eval printf '%s\\n' $HOSTCC_O
1104 }
1105
1106 check_host_cc(){
1107     log check_host_cc "$@"
1108     cat > $TMPC
1109     log_file $TMPC
1110     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1111 }
1112
1113 check_host_cpp(){
1114     log check_host_cpp "$@"
1115     cat > $TMPC
1116     log_file $TMPC
1117     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1118 }
1119
1120 check_host_cppflags(){
1121     log check_host_cppflags "$@"
1122     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1123 int x;
1124 EOF
1125 }
1126
1127 check_host_cflags(){
1128     log check_host_cflags "$@"
1129     set -- $($host_cflags_filter "$@")
1130     check_host_cc "$@" <<EOF && append host_cflags "$@"
1131 int x;
1132 EOF
1133 }
1134
1135 check_host_cpp_condition(){
1136     log check_host_cpp_condition "$@"
1137     header=$1
1138     condition=$2
1139     shift 2
1140     check_host_cpp "$@" <<EOF
1141 #include <$header>
1142 #if !($condition)
1143 #error "unsatisfied condition: $condition"
1144 #endif
1145 EOF
1146 }
1147
1148 apply(){
1149     file=$1
1150     shift
1151     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1152 }
1153
1154 cp_if_changed(){
1155     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1156     mkdir -p "$(dirname $2)"
1157     $cp_f "$1" "$2"
1158 }
1159
1160 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1161 # system-dependent things.
1162
1163 AVCODEC_COMPONENTS="
1164     bsfs
1165     decoders
1166     encoders
1167     hwaccels
1168     parsers
1169 "
1170
1171 AVDEVICE_COMPONENTS="
1172     indevs
1173     outdevs
1174 "
1175 AVFILTER_COMPONENTS="
1176     filters
1177 "
1178 AVFORMAT_COMPONENTS="
1179     demuxers
1180     muxers
1181     protocols
1182 "
1183
1184 AVRESAMPLE_COMPONENTS=""
1185 AVUTIL_COMPONENTS=""
1186
1187 COMPONENT_LIST="
1188     $AVCODEC_COMPONENTS
1189     $AVDEVICE_COMPONENTS
1190     $AVFILTER_COMPONENTS
1191     $AVFORMAT_COMPONENTS
1192     $AVRESAMPLE_COMPONENTS
1193     $AVUTIL_COMPONENTS
1194 "
1195
1196 EXAMPLE_LIST="
1197     avcodec_example
1198     filter_audio_example
1199     metadata_example
1200     output_example
1201     qsvdec_example
1202     transcode_aac_example
1203 "
1204
1205 EXTERNAL_LIBRARY_LIST="
1206     avisynth
1207     bzlib
1208     frei0r
1209     gnutls
1210     libbs2b
1211     libcdio
1212     libdc1394
1213     libdcadec
1214     libfaac
1215     libfdk_aac
1216     libfontconfig
1217     libfreetype
1218     libgsm
1219     libilbc
1220     libkvazaar
1221     libmfx
1222     libmp3lame
1223     libopencore_amrnb
1224     libopencore_amrwb
1225     libopencv
1226     libopenh264
1227     libopenjpeg
1228     libopus
1229     libpulse
1230     librtmp
1231     libschroedinger
1232     libsnappy
1233     libspeex
1234     libtheora
1235     libtwolame
1236     libvo_aacenc
1237     libvo_amrwbenc
1238     libvorbis
1239     libvpx
1240     libwavpack
1241     libwebp
1242     libx264
1243     libx265
1244     libxavs
1245     libxcb
1246     libxcb_shm
1247     libxcb_xfixes
1248     libxvid
1249     mmal
1250     nvenc
1251     openssl
1252     x11grab
1253     zlib
1254 "
1255
1256 FEATURE_LIST="
1257     gray
1258     hardcoded_tables
1259     runtime_cpudetect
1260     safe_bitstream_reader
1261     shared
1262     small
1263     sram
1264     static
1265     swscale_alpha
1266 "
1267
1268 HWACCEL_LIST="
1269     d3d11va
1270     dxva2
1271     vaapi
1272     vda
1273     vdpau
1274 "
1275
1276 LIBRARY_LIST="
1277     avcodec
1278     avdevice
1279     avfilter
1280     avformat
1281     avresample
1282     avutil
1283     swscale
1284 "
1285
1286 LICENSE_LIST="
1287     gpl
1288     nonfree
1289     version3
1290 "
1291
1292 PROGRAM_LIST="
1293     avconv
1294     avplay
1295     avprobe
1296 "
1297
1298 SUBSYSTEM_LIST="
1299     dct
1300     doc
1301     error_resilience
1302     faan
1303     fft
1304     lsp
1305     lzo
1306     mdct
1307     network
1308     rdft
1309 "
1310
1311 CONFIG_LIST="
1312     $COMPONENT_LIST
1313     $EXAMPLE_LIST
1314     $EXTERNAL_LIBRARY_LIST
1315     $FEATURE_LIST
1316     $HWACCEL_LIST
1317     $LICENSE_LIST
1318     $LIBRARY_LIST
1319     $PROGRAM_LIST
1320     $SUBSYSTEM_LIST
1321     memalign_hack
1322     neon_clobber_test
1323     pic
1324     pod2man
1325     texi2html
1326     thumb
1327     valgrind_backtrace
1328     xmm_clobber_test
1329 "
1330
1331 THREADS_LIST="
1332     pthreads
1333     w32threads
1334 "
1335
1336 ATOMICS_LIST="
1337     atomics_gcc
1338     atomics_suncc
1339     atomics_win32
1340 "
1341
1342 ARCH_LIST="
1343     aarch64
1344     alpha
1345     arm
1346     avr32
1347     avr32_ap
1348     avr32_uc
1349     bfin
1350     ia64
1351     m68k
1352     mips
1353     mips64
1354     parisc
1355     ppc
1356     ppc64
1357     s390
1358     sh4
1359     sparc
1360     sparc64
1361     tilegx
1362     tilepro
1363     tomi
1364     x86
1365     x86_32
1366     x86_64
1367 "
1368
1369 ARCH_EXT_LIST_ARM="
1370     armv5te
1371     armv6
1372     armv6t2
1373     armv8
1374     neon
1375     vfp
1376     vfpv3
1377 "
1378
1379 ARCH_EXT_LIST_X86_SIMD="
1380     amd3dnow
1381     amd3dnowext
1382     avx
1383     avx2
1384     fma3
1385     fma4
1386     mmx
1387     mmxext
1388     sse
1389     sse2
1390     sse3
1391     sse4
1392     sse42
1393     ssse3
1394     xop
1395 "
1396
1397 ARCH_EXT_LIST_PPC="
1398     altivec
1399     dcbzl
1400     ldbrx
1401     power8
1402     ppc4xx
1403     vsx
1404 "
1405
1406 ARCH_EXT_LIST_X86="
1407     $ARCH_EXT_LIST_X86_SIMD
1408     cpunop
1409     i686
1410 "
1411
1412 ARCH_EXT_LIST_MIPS="
1413     loongson
1414     mips32r1
1415     mips64r1
1416     mips32r2
1417     mips64r2
1418     mips32r6
1419     mips64r6
1420 "
1421
1422 ARCH_EXT_LIST="
1423     $ARCH_EXT_LIST_ARM
1424     $ARCH_EXT_LIST_MIPS
1425     $ARCH_EXT_LIST_PPC
1426     $ARCH_EXT_LIST_X86
1427     vis
1428 "
1429
1430 ARCH_FEATURES="
1431     aligned_stack
1432     fast_64bit
1433     fast_clz
1434     fast_cmov
1435     local_aligned_8
1436     local_aligned_16
1437     simd_align_16
1438 "
1439
1440 BUILTIN_LIST="
1441     atomic_cas_ptr
1442     machine_rw_barrier
1443     MemoryBarrier
1444     mm_empty
1445     rdtsc
1446     sync_val_compare_and_swap
1447 "
1448 HAVE_LIST_CMDLINE="
1449     inline_asm
1450     symver
1451     yasm
1452 "
1453
1454 HAVE_LIST_PUB="
1455     bigendian
1456     fast_unaligned
1457 "
1458
1459 HEADERS_LIST="
1460     AVFoundation_AVFoundation_h
1461     alsa_asoundlib_h
1462     altivec_h
1463     arpa_inet_h
1464     cdio_paranoia_h
1465     cdio_paranoia_paranoia_h
1466     dev_bktr_ioctl_bt848_h
1467     dev_bktr_ioctl_meteor_h
1468     dev_ic_bt8xx_h
1469     dev_video_bktr_ioctl_bt848_h
1470     dev_video_meteor_ioctl_meteor_h
1471     direct_h
1472     dlfcn_h
1473     d3d11_h
1474     dxva_h
1475     gsm_h
1476     io_h
1477     mach_mach_time_h
1478     machine_ioctl_bt848_h
1479     machine_ioctl_meteor_h
1480     malloc_h
1481     poll_h
1482     sndio_h
1483     soundcard_h
1484     sys_mman_h
1485     sys_param_h
1486     sys_resource_h
1487     sys_select_h
1488     sys_soundcard_h
1489     sys_time_h
1490     sys_un_h
1491     sys_videoio_h
1492     unistd_h
1493     valgrind_valgrind_h
1494     windows_h
1495     winsock2_h
1496 "
1497
1498 INTRINSICS_LIST="
1499     intrinsics_neon
1500 "
1501
1502 MATH_FUNCS="
1503     atanf
1504     atan2f
1505     cbrtf
1506     cosf
1507     exp2
1508     exp2f
1509     expf
1510     isinf
1511     isnan
1512     ldexpf
1513     llrint
1514     llrintf
1515     log2
1516     log2f
1517     log10f
1518     lrint
1519     lrintf
1520     powf
1521     rint
1522     round
1523     roundf
1524     sinf
1525     trunc
1526     truncf
1527 "
1528
1529 SYSTEM_FUNCS="
1530     aligned_malloc
1531     clock_gettime
1532     closesocket
1533     CommandLineToArgvW
1534     CoTaskMemFree
1535     CryptGenRandom
1536     dlopen
1537     fcntl
1538     flt_lim
1539     fork
1540     getaddrinfo
1541     gethrtime
1542     getopt
1543     GetProcessAffinityMask
1544     GetProcessMemoryInfo
1545     GetProcessTimes
1546     getrusage
1547     GetSystemTimeAsFileTime
1548     gettimeofday
1549     gmtime_r
1550     inet_aton
1551     isatty
1552     jack_port_get_latency_range
1553     LoadLibrary
1554     localtime_r
1555     mach_absolute_time
1556     MapViewOfFile
1557     memalign
1558     mkstemp
1559     mmap
1560     mprotect
1561     nanosleep
1562     posix_memalign
1563     sched_getaffinity
1564     SetConsoleTextAttribute
1565     setmode
1566     setrlimit
1567     Sleep
1568     strerror_r
1569     sysconf
1570     sysctl
1571     usleep
1572     VirtualAlloc
1573 "
1574
1575 TOOLCHAIN_FEATURES="
1576     as_dn_directive
1577     as_func
1578     as_object_arch
1579     asm_mod_q
1580     attribute_may_alias
1581     attribute_packed
1582     ebp_available
1583     ebx_available
1584     gnu_as
1585     ibm_asm
1586     inline_asm_labels
1587     pragma_deprecated
1588     symver_asm_label
1589     symver_gnu_asm
1590     vfp_args
1591     xform_asm
1592     xmm_clobbers
1593 "
1594
1595 TYPES_LIST="
1596     CONDITION_VARIABLE_Ptr
1597     socklen_t
1598     struct_addrinfo
1599     struct_group_source_req
1600     struct_ip_mreq_source
1601     struct_ipv6_mreq
1602     struct_pollfd
1603     struct_rusage_ru_maxrss
1604     struct_sockaddr_in6
1605     struct_sockaddr_sa_len
1606     struct_sockaddr_storage
1607     struct_v4l2_frmivalenum_discrete
1608 "
1609
1610 HAVE_LIST="
1611     $ARCH_EXT_LIST
1612     $(add_suffix _external $ARCH_EXT_LIST)
1613     $(add_suffix _inline   $ARCH_EXT_LIST)
1614     $ARCH_FEATURES
1615     $ATOMICS_LIST
1616     $BUILTIN_LIST
1617     $HAVE_LIST_CMDLINE
1618     $HAVE_LIST_PUB
1619     $HEADERS_LIST
1620     $INTRINSICS_LIST
1621     $MATH_FUNCS
1622     $SYSTEM_FUNCS
1623     $THREADS_LIST
1624     $TOOLCHAIN_FEATURES
1625     $TYPES_LIST
1626     atomics_native
1627     dos_paths
1628     dxva2_lib
1629     libc_msvcrt
1630     libdc1394_1
1631     libdc1394_2
1632     sdl
1633     section_data_rel_ro
1634     threads
1635     vaapi_x11
1636     vdpau_x11
1637     xlib
1638 "
1639
1640 # options emitted with CONFIG_ prefix but not available on the command line
1641 CONFIG_EXTRA="
1642     aandcttables
1643     ac3dsp
1644     audio_frame_queue
1645     audiodsp
1646     blockdsp
1647     bswapdsp
1648     cabac
1649     dirac_parse
1650     dvprofile
1651     faandct
1652     faanidct
1653     fdctdsp
1654     flacdsp
1655     fmtconvert
1656     g722dsp
1657     gcrypt
1658     gmp
1659     golomb
1660     gplv3
1661     h263dsp
1662     h264chroma
1663     h264dsp
1664     h264pred
1665     h264qpel
1666     hpeldsp
1667     huffman
1668     huffyuvdsp
1669     huffyuvencdsp
1670     idctdsp
1671     iirfilter
1672     imdct15
1673     intrax8
1674     ividsp
1675     jpegtables
1676     libx262
1677     lgplv3
1678     lpc
1679     lzf
1680     me_cmp
1681     mpeg_er
1682     mpegaudio
1683     mpegaudiodsp
1684     mpegvideo
1685     mpegvideoenc
1686     mss34dsp
1687     pixblockdsp
1688     qpeldsp
1689     qsv
1690     qsvdec
1691     qsvenc
1692     rangecoder
1693     riffdec
1694     riffenc
1695     rtpdec
1696     rtpenc_chain
1697     rv34dsp
1698     sinewin
1699     snappy
1700     startcode
1701     texturedsp
1702     texturedspenc
1703     tpeldsp
1704     videodsp
1705     vp3dsp
1706     vp56dsp
1707     vp8dsp
1708     wma_freqs
1709     wmv2dsp
1710 "
1711
1712 CMDLINE_SELECT="
1713     $ARCH_EXT_LIST
1714     $CONFIG_LIST
1715     $HAVE_LIST_CMDLINE
1716     $THREADS_LIST
1717     asm
1718     cross_compile
1719     debug
1720     extra_warnings
1721     logging
1722     lto
1723     optimizations
1724     rpath
1725 "
1726
1727 PATHS_LIST="
1728     bindir
1729     datadir
1730     docdir
1731     incdir
1732     libdir
1733     mandir
1734     prefix
1735     shlibdir
1736 "
1737
1738 CMDLINE_SET="
1739     $PATHS_LIST
1740     ar
1741     arch
1742     as
1743     build_suffix
1744     cc
1745     objcc
1746     cpu
1747     cross_prefix
1748     custom_allocator
1749     dep_cc
1750     env
1751     extra_version
1752     host_cc
1753     host_cflags
1754     host_ld
1755     host_ldflags
1756     host_libs
1757     host_os
1758     ld
1759     logfile
1760     malloc_prefix
1761     nm
1762     optflags
1763     pkg_config
1764     pkg_config_flags
1765     random_seed
1766     samples
1767     sysinclude
1768     sysroot
1769     target_exec
1770     target_os
1771     target_path
1772     target_samples
1773     toolchain
1774 "
1775
1776 CMDLINE_APPEND="
1777     extra_cflags
1778     extra_objcflags
1779     host_cppflags
1780 "
1781
1782 # code dependency declarations
1783
1784 # architecture extensions
1785
1786 armv5te_deps="arm"
1787 armv6_deps="arm"
1788 armv6t2_deps="arm"
1789 armv8_deps="aarch64"
1790 neon_deps_any="aarch64 arm"
1791 intrinsics_neon_deps="neon"
1792 vfp_deps_any="aarch64 arm"
1793 vfpv3_deps="vfp"
1794
1795 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1796
1797 altivec_deps="ppc"
1798 ppc4xx_deps="ppc"
1799 vsx_deps="altivec"
1800 power8_deps="vsx"
1801
1802 cpunop_deps="i686"
1803 x86_64_select="i686"
1804 x86_64_suggest="fast_cmov"
1805
1806 amd3dnow_deps="mmx"
1807 amd3dnowext_deps="amd3dnow"
1808 i686_deps="x86"
1809 mmx_deps="x86"
1810 mmxext_deps="mmx"
1811 sse_deps="mmxext"
1812 sse2_deps="sse"
1813 sse3_deps="sse2"
1814 ssse3_deps="sse3"
1815 sse4_deps="ssse3"
1816 sse42_deps="sse4"
1817 avx_deps="sse42"
1818 xop_deps="avx"
1819 fma3_deps="avx"
1820 fma4_deps="avx"
1821 avx2_deps="avx"
1822
1823 mmx_external_deps="yasm"
1824 mmx_inline_deps="inline_asm"
1825 mmx_suggest="mmx_external mmx_inline"
1826
1827 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1828     eval dep=\$${ext}_deps
1829     eval ${ext}_external_deps='"${dep}_external"'
1830     eval ${ext}_inline_deps='"${dep}_inline"'
1831     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1832 done
1833
1834 aligned_stack_if_any="aarch64 ppc x86"
1835 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1836 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1837 fast_unaligned_if_any="aarch64 ppc x86"
1838 simd_align_16_if_any="altivec neon sse"
1839
1840 # system capabilities
1841 symver_if_any="symver_asm_label symver_gnu_asm"
1842 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
1843
1844 # threading support
1845 atomics_gcc_if="sync_val_compare_and_swap"
1846 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1847 atomics_win32_if="MemoryBarrier"
1848 atomics_native_if_any="$ATOMICS_LIST"
1849 w32threads_deps="atomics_native"
1850 threads_if_any="$THREADS_LIST"
1851
1852 # subsystems
1853 dct_select="rdft"
1854 dirac_parse_select="golomb"
1855 error_resilience_select="me_cmp"
1856 faandct_deps="faan fdctdsp"
1857 faanidct_deps="faan idctdsp"
1858 intrax8_select="error_resilience"
1859 mdct_select="fft"
1860 rdft_select="fft"
1861 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1862 mpeg_er_select="error_resilience"
1863 mpegaudio_select="mpegaudiodsp"
1864 mpegaudiodsp_select="dct"
1865 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp videodsp"
1866 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1867 nvenc_deps_any="dlopen LoadLibrary"
1868 nvenc_extralibs='$ldl'
1869 qsvdec_select="qsv"
1870 qsvenc_select="qsv"
1871
1872 # decoders / encoders
1873 aac_decoder_select="imdct15 mdct sinewin"
1874 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1875 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1876 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1877 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1878 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1879 adpcm_g722_decoder_select="g722dsp"
1880 adpcm_g722_encoder_select="g722dsp"
1881 aic_decoder_select="golomb idctdsp"
1882 alac_encoder_select="lpc"
1883 als_decoder_select="bswapdsp"
1884 amrnb_decoder_select="lsp"
1885 amrwb_decoder_select="lsp"
1886 amv_decoder_select="sp5x_decoder"
1887 ape_decoder_select="bswapdsp"
1888 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1889 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1890 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1891 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1892 atrac1_decoder_select="mdct sinewin"
1893 atrac3_decoder_select="mdct"
1894 atrac3p_decoder_select="mdct sinewin"
1895 bink_decoder_select="blockdsp hpeldsp"
1896 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1897 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1898 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1899 cllc_decoder_select="bswapdsp"
1900 comfortnoise_encoder_select="lpc"
1901 cook_decoder_select="audiodsp mdct sinewin"
1902 cscd_decoder_select="lzo"
1903 cscd_decoder_suggest="zlib"
1904 dca_decoder_select="fmtconvert mdct"
1905 dds_decoder_select="texturedsp"
1906 dnxhd_decoder_select="blockdsp idctdsp"
1907 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1908 dvvideo_decoder_select="dvprofile idctdsp"
1909 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1910 dxa_decoder_deps="zlib"
1911 dxv_decoder_select="lzf texturedsp"
1912 eac3_decoder_select="ac3_decoder"
1913 eac3_encoder_select="ac3_encoder"
1914 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1915 eatgq_decoder_select="aandcttables idctdsp"
1916 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpeg1video_decoder"
1917 exr_decoder_deps="zlib"
1918 ffv1_decoder_select="golomb rangecoder"
1919 ffv1_encoder_select="rangecoder"
1920 ffvhuff_decoder_select="huffyuv_decoder"
1921 ffvhuff_encoder_select="huffyuv_encoder"
1922 fic_decoder_select="golomb"
1923 flac_decoder_select="flacdsp golomb"
1924 flac_encoder_select="bswapdsp flacdsp golomb lpc"
1925 flashsv_decoder_deps="zlib"
1926 flashsv_encoder_deps="zlib"
1927 flashsv2_decoder_deps="zlib"
1928 flv_decoder_select="h263_decoder"
1929 flv_encoder_select="h263_encoder"
1930 fourxm_decoder_select="blockdsp bswapdsp"
1931 fraps_decoder_select="bswapdsp huffman"
1932 g2m_decoder_deps="zlib"
1933 g2m_decoder_select="blockdsp idctdsp jpegtables"
1934 h261_decoder_select="mpeg_er mpegvideo"
1935 h261_encoder_select="aandcttables mpegvideoenc"
1936 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
1937 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1938 h263i_decoder_select="h263_decoder"
1939 h263p_encoder_select="h263_encoder"
1940 h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel startcode videodsp"
1941 h264_decoder_suggest="error_resilience"
1942 h264_nvenc_encoder_deps="nvenc"
1943 h264_qsv_decoder_deps="libmfx"
1944 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
1945 h264_qsv_encoder_deps="libmfx"
1946 h264_qsv_encoder_select="qsvenc"
1947 hap_decoder_select="snappy texturedsp"
1948 hap_encoder_deps="libsnappy"
1949 hap_encoder_select="texturedspenc"
1950 hevc_decoder_select="bswapdsp cabac golomb videodsp"
1951 hevc_nvenc_encoder_deps="nvenc"
1952 hevc_qsv_encoder_deps="libmfx"
1953 hevc_qsv_decoder_deps="libmfx"
1954 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser qsvdec hevc_qsv_hwaccel"
1955 hevc_qsv_encoder_select="qsvenc"
1956 huffyuv_decoder_select="bswapdsp huffyuvdsp"
1957 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
1958 iac_decoder_select="imc_decoder"
1959 imc_decoder_select="bswapdsp fft mdct sinewin"
1960 indeo3_decoder_select="hpeldsp"
1961 indeo4_decoder_select="ividsp"
1962 indeo5_decoder_select="ividsp"
1963 interplay_video_decoder_select="hpeldsp"
1964 jpegls_decoder_select="golomb mjpeg_decoder"
1965 jpegls_encoder_select="golomb"
1966 jv_decoder_select="blockdsp"
1967 lagarith_decoder_select="huffyuvdsp"
1968 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
1969 loco_decoder_select="golomb"
1970 mdec_decoder_select="blockdsp idctdsp mpegvideo"
1971 metasound_decoder_select="lsp mdct sinewin"
1972 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
1973 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
1974 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
1975 mjpegb_decoder_select="mjpeg_decoder"
1976 mlp_decoder_select="mlp_parser"
1977 motionpixels_decoder_select="bswapdsp"
1978 mp1_decoder_select="mpegaudio"
1979 mp1float_decoder_select="mpegaudio"
1980 mp2_decoder_select="mpegaudio"
1981 mp2float_decoder_select="mpegaudio"
1982 mp3_decoder_select="mpegaudio"
1983 mp3adu_decoder_select="mpegaudio"
1984 mp3adufloat_decoder_select="mpegaudio"
1985 mp3float_decoder_select="mpegaudio"
1986 mp3on4_decoder_select="mpegaudio"
1987 mp3on4float_decoder_select="mpegaudio"
1988 mpc7_decoder_select="bswapdsp mpegaudiodsp"
1989 mpc8_decoder_select="mpegaudiodsp"
1990 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
1991 mpeg_xvmc_decoder_select="mpeg2video_decoder"
1992 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
1993 mpeg1video_encoder_select="aandcttables mpegvideoenc"
1994 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
1995 mpeg2video_encoder_select="aandcttables mpegvideoenc"
1996 mpeg2_qsv_decoder_deps="libmfx"
1997 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
1998 mpeg2_qsv_encoder_deps="libmfx"
1999 mpeg2_qsv_encoder_select="qsvenc"
2000 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2001 mpeg4_encoder_select="h263_encoder"
2002 msa1_decoder_select="mss34dsp"
2003 msmpeg4v1_decoder_select="h263_decoder"
2004 msmpeg4v2_decoder_select="h263_decoder"
2005 msmpeg4v2_encoder_select="h263_encoder"
2006 msmpeg4v3_decoder_select="h263_decoder"
2007 msmpeg4v3_encoder_select="h263_encoder"
2008 mss2_decoder_select="error_resilience mpeg_er qpeldsp vc1_decoder"
2009 mts2_decoder_select="mss34dsp"
2010 mxpeg_decoder_select="mjpeg_decoder"
2011 nellymoser_decoder_select="mdct sinewin"
2012 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2013 nuv_decoder_select="idctdsp lzo"
2014 nvenc_h264_encoder_deps="nvenc"
2015 nvenc_hevc_encoder_deps="nvenc"
2016 on2avc_decoder_select="mdct"
2017 opus_decoder_deps="avresample"
2018 opus_decoder_select="imdct15"
2019 png_decoder_deps="zlib"
2020 png_encoder_deps="zlib"
2021 png_encoder_select="huffyuvencdsp"
2022 prores_decoder_select="idctdsp"
2023 prores_encoder_select="fdctdsp"
2024 qcelp_decoder_select="lsp"
2025 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2026 ra_144_encoder_select="audio_frame_queue lpc"
2027 ralf_decoder_select="golomb"
2028 rscc_decoder_deps="zlib"
2029 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2030 rv10_encoder_select="h263_encoder"
2031 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2032 rv20_encoder_select="h263_encoder"
2033 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2034 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2035 screenpresso_decoder_deps="zlib"
2036 shorten_decoder_select="golomb"
2037 sipr_decoder_select="lsp"
2038 sp5x_decoder_select="mjpeg_decoder"
2039 svq1_decoder_select="hpeldsp"
2040 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2041 svq3_decoder_select="h264_decoder hpeldsp tpeldsp"
2042 svq3_decoder_suggest="zlib"
2043 tak_decoder_select="audiodsp"
2044 tdsc_decoder_deps="zlib"
2045 tdsc_decoder_select="mjpeg_decoder"
2046 theora_decoder_select="vp3_decoder"
2047 thp_decoder_select="mjpeg_decoder"
2048 tiff_decoder_suggest="zlib"
2049 tiff_encoder_suggest="zlib"
2050 truehd_decoder_select="mlp_decoder"
2051 truemotion2_decoder_select="bswapdsp"
2052 truespeech_decoder_select="bswapdsp"
2053 tscc_decoder_deps="zlib"
2054 txd_decoder_select="texturedsp"
2055 twinvq_decoder_select="mdct lsp sinewin"
2056 utvideo_decoder_select="bswapdsp"
2057 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2058 vble_decoder_select="huffyuvdsp"
2059 vc1_decoder_select="blockdsp error_resilience h263_decoder h264chroma h264qpel intrax8 mpeg_er qpeldsp startcode"
2060 vc1image_decoder_select="vc1_decoder"
2061 vorbis_decoder_select="mdct"
2062 vorbis_encoder_select="mdct"
2063 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2064 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2065 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2066 vp6a_decoder_select="vp6_decoder"
2067 vp6f_decoder_select="vp6_decoder"
2068 vp7_decoder_select="h264pred videodsp vp8dsp"
2069 vp8_decoder_select="h264pred videodsp vp8dsp"
2070 vp9_decoder_select="videodsp"
2071 webp_decoder_select="vp8_decoder"
2072 wmapro_decoder_select="mdct sinewin wma_freqs"
2073 wmav1_decoder_select="mdct sinewin wma_freqs"
2074 wmav1_encoder_select="mdct sinewin wma_freqs"
2075 wmav2_decoder_select="mdct sinewin wma_freqs"
2076 wmav2_encoder_select="mdct sinewin wma_freqs"
2077 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2078 wmv1_decoder_select="h263_decoder"
2079 wmv1_encoder_select="h263_encoder"
2080 wmv2_decoder_select="blockdsp h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2081 wmv2_encoder_select="h263_encoder wmv2dsp"
2082 wmv3_decoder_select="vc1_decoder"
2083 wmv3image_decoder_select="wmv3_decoder"
2084 zerocodec_decoder_deps="zlib"
2085 zlib_decoder_deps="zlib"
2086 zlib_encoder_deps="zlib"
2087 zmbv_decoder_deps="zlib"
2088 zmbv_encoder_deps="zlib"
2089
2090 # hardware accelerators
2091 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2092 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2093 vaapi_deps="va_va_h"
2094 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2095 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2096 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2097
2098 h263_vaapi_hwaccel_deps="vaapi"
2099 h263_vaapi_hwaccel_select="h263_decoder"
2100 h264_d3d11va_hwaccel_deps="d3d11va"
2101 h264_d3d11va_hwaccel_select="h264_decoder"
2102 h264_dxva2_hwaccel_deps="dxva2"
2103 h264_dxva2_hwaccel_select="h264_decoder"
2104 h264_mmal_decoder_deps="mmal"
2105 h264_mmal_hwaccel_deps="mmal"
2106 h264_mmal_decoder_select="h264_decoder"
2107 h264_mmal_encoder_deps="mmal"
2108 h264_qsv_hwaccel_deps="libmfx"
2109 h264_vaapi_hwaccel_deps="vaapi"
2110 h264_vaapi_hwaccel_select="h264_decoder"
2111 h264_vda_hwaccel_deps="vda"
2112 h264_vda_hwaccel_select="h264_decoder"
2113 h264_vda_old_hwaccel_deps="vda"
2114 h264_vda_old_hwaccel_select="h264_decoder"
2115 h264_vdpau_hwaccel_deps="vdpau"
2116 h264_vdpau_hwaccel_select="h264_decoder"
2117 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2118 hevc_d3d11va_hwaccel_select="hevc_decoder"
2119 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2120 hevc_dxva2_hwaccel_select="hevc_decoder"
2121 hevc_qsv_hwaccel_deps="libmfx"
2122 mpeg1_vdpau_hwaccel_deps="vdpau"
2123 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2124 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2125 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2126 mpeg2_dxva2_hwaccel_deps="dxva2"
2127 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2128 mpeg2_qsv_hwaccel_deps="libmfx"
2129 mpeg2_vaapi_hwaccel_deps="vaapi"
2130 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2131 mpeg2_vdpau_hwaccel_deps="vdpau"
2132 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2133 mpeg4_vaapi_hwaccel_deps="vaapi"
2134 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2135 mpeg4_vdpau_hwaccel_deps="vdpau"
2136 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2137 vc1_d3d11va_hwaccel_deps="d3d11va"
2138 vc1_d3d11va_hwaccel_select="vc1_decoder"
2139 vc1_dxva2_hwaccel_deps="dxva2"
2140 vc1_dxva2_hwaccel_select="vc1_decoder"
2141 vc1_vaapi_hwaccel_deps="vaapi"
2142 vc1_vaapi_hwaccel_select="vc1_decoder"
2143 vc1_vdpau_hwaccel_deps="vdpau"
2144 vc1_vdpau_hwaccel_select="vc1_decoder"
2145 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2146 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2147 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2148 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2149
2150 # parsers
2151 h264_parser_select="h264_decoder"
2152 hevc_parser_select="golomb"
2153 mpegvideo_parser_select="mpegvideo"
2154 mpeg4video_parser_select="error_resilience h263dsp mpeg_er mpegvideo qpeldsp"
2155 vc1_parser_select="mpegvideo startcode vc1_decoder"
2156
2157 # bitstream_filters
2158 mjpeg2jpeg_bsf_select="jpegtables"
2159
2160 # external libraries
2161 libdcadec_decoder_deps="libdcadec"
2162 libfaac_encoder_deps="libfaac"
2163 libfaac_encoder_select="audio_frame_queue"
2164 libfdk_aac_decoder_deps="libfdk_aac"
2165 libfdk_aac_encoder_deps="libfdk_aac"
2166 libfdk_aac_encoder_select="audio_frame_queue"
2167 libgsm_decoder_deps="libgsm"
2168 libgsm_encoder_deps="libgsm"
2169 libgsm_ms_decoder_deps="libgsm"
2170 libgsm_ms_encoder_deps="libgsm"
2171 libilbc_decoder_deps="libilbc"
2172 libilbc_encoder_deps="libilbc"
2173 libkvazaar_encoder_deps="libkvazaar"
2174 libmp3lame_encoder_deps="libmp3lame"
2175 libmp3lame_encoder_select="audio_frame_queue"
2176 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2177 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2178 libopencore_amrnb_encoder_select="audio_frame_queue"
2179 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2180 libopenh264_encoder_deps="libopenh264"
2181 libopenjpeg_decoder_deps="libopenjpeg"
2182 libopenjpeg_encoder_deps="libopenjpeg"
2183 libopus_decoder_deps="libopus"
2184 libopus_encoder_deps="libopus"
2185 libopus_encoder_select="audio_frame_queue"
2186 libschroedinger_decoder_deps="libschroedinger"
2187 libschroedinger_encoder_deps="libschroedinger"
2188 libspeex_decoder_deps="libspeex"
2189 libspeex_encoder_deps="libspeex"
2190 libspeex_encoder_select="audio_frame_queue"
2191 libtheora_encoder_deps="libtheora"
2192 libtwolame_encoder_deps="libtwolame"
2193 libvo_aacenc_encoder_deps="libvo_aacenc"
2194 libvo_aacenc_encoder_select="audio_frame_queue"
2195 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2196 libvorbis_encoder_deps="libvorbis"
2197 libvorbis_encoder_select="audio_frame_queue"
2198 libvpx_vp8_decoder_deps="libvpx"
2199 libvpx_vp8_encoder_deps="libvpx"
2200 libvpx_vp9_decoder_deps="libvpx"
2201 libvpx_vp9_encoder_deps="libvpx"
2202 libwavpack_encoder_deps="libwavpack"
2203 libwebp_encoder_deps="libwebp"
2204 libx262_encoder_deps="libx262"
2205 libx264_encoder_deps="libx264"
2206 libx265_encoder_deps="libx265"
2207 libxavs_encoder_deps="libxavs"
2208 libxvid_encoder_deps="libxvid"
2209
2210 # demuxers / muxers
2211 ac3_demuxer_select="ac3_parser"
2212 asf_demuxer_select="riffdec"
2213 asf_muxer_select="riffenc"
2214 asf_stream_muxer_select="asf_muxer"
2215 avi_demuxer_select="riffdec"
2216 avi_muxer_select="riffenc"
2217 avisynth_demuxer_deps="avisynth"
2218 avisynth_demuxer_select="riffdec"
2219 caf_demuxer_select="riffdec"
2220 dash_muxer_select="mp4_muxer"
2221 dirac_demuxer_select="dirac_parser"
2222 dv_demuxer_select="dvprofile"
2223 dv_muxer_select="dvprofile"
2224 dxa_demuxer_select="riffdec"
2225 eac3_demuxer_select="ac3_parser"
2226 f4v_muxer_select="mov_muxer"
2227 flac_demuxer_select="flac_parser"
2228 hds_muxer_select="flv_muxer"
2229 hls_muxer_select="mpegts_muxer"
2230 ipod_muxer_select="mov_muxer"
2231 ismv_muxer_select="mov_muxer"
2232 matroska_audio_muxer_select="matroska_muxer"
2233 matroska_demuxer_select="riffdec"
2234 matroska_demuxer_suggest="bzlib lzo zlib"
2235 matroska_muxer_select="riffenc"
2236 mmf_muxer_select="riffenc"
2237 mov_demuxer_select="riffdec"
2238 mov_demuxer_suggest="zlib"
2239 mov_muxer_select="riffenc rtpenc_chain"
2240 mp3_demuxer_select="mpegaudio_parser"
2241 mp4_muxer_select="mov_muxer"
2242 mpegts_muxer_select="adts_muxer latm_muxer"
2243 mpegtsraw_demuxer_select="mpegts_demuxer"
2244 mxf_d10_muxer_select="mxf_muxer"
2245 nut_muxer_select="riffenc"
2246 nuv_demuxer_select="riffdec"
2247 oga_muxer_select="ogg_muxer"
2248 ogg_demuxer_select="dirac_parse"
2249 opus_muxer_select="ogg_muxer"
2250 psp_muxer_select="mov_muxer"
2251 rtp_demuxer_select="sdp_demuxer"
2252 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol"
2253 rtsp_demuxer_select="http_protocol rtpdec"
2254 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2255 sap_demuxer_select="sdp_demuxer"
2256 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2257 sdp_demuxer_select="rtpdec"
2258 smoothstreaming_muxer_select="ismv_muxer"
2259 spdif_muxer_select="aac_parser"
2260 spx_muxer_select="ogg_muxer"
2261 swf_demuxer_suggest="zlib"
2262 tak_demuxer_select="tak_parser"
2263 tg2_muxer_select="mov_muxer"
2264 tgp_muxer_select="mov_muxer"
2265 w64_demuxer_select="wav_demuxer"
2266 wav_demuxer_select="riffdec"
2267 wav_muxer_select="riffenc"
2268 webm_muxer_select="riffenc"
2269 webm_muxer_suggest="libopus_encoder libvorbis_encoder libvpx_vp8_encoder libvpx_vp9_encoder"
2270 wtv_demuxer_select="riffdec"
2271 xmv_demuxer_select="riffdec"
2272 xwma_demuxer_select="riffdec"
2273
2274 # indevs / outdevs
2275 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2276 alsa_outdev_deps="alsa_asoundlib_h"
2277 avfoundation_indev_deps="AVFoundation_AVFoundation_h"
2278 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2279 dv1394_indev_deps="dv1394"
2280 dv1394_indev_select="dv_demuxer"
2281 fbdev_indev_deps="linux_fb_h"
2282 jack_indev_deps="jack_jack_h pthreads"
2283 libcdio_indev_deps="libcdio"
2284 libdc1394_indev_deps="libdc1394"
2285 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2286 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2287 pulse_indev_deps="libpulse"
2288 sndio_indev_deps="sndio_h"
2289 sndio_outdev_deps="sndio_h"
2290 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2291 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2292 vfwcap_indev_extralibs="-lavicap32"
2293 x11grab_indev_deps="x11grab"
2294 x11grab_xcb_indev_deps="libxcb"
2295
2296 # protocols
2297 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2298 ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
2299 ffrtmpcrypt_protocol_select="tcp_protocol"
2300 ffrtmphttp_protocol_deps="!librtmp_protocol"
2301 ffrtmphttp_protocol_select="http_protocol"
2302 gopher_protocol_select="network"
2303 http_protocol_select="tcp_protocol"
2304 httpproxy_protocol_select="tcp_protocol"
2305 https_protocol_select="tls_protocol"
2306 icecast_protocol_select="http_protocol"
2307 librtmp_protocol_deps="librtmp"
2308 librtmpe_protocol_deps="librtmp"
2309 librtmps_protocol_deps="librtmp"
2310 librtmpt_protocol_deps="librtmp"
2311 librtmpte_protocol_deps="librtmp"
2312 mmsh_protocol_select="http_protocol"
2313 mmst_protocol_select="network"
2314 rtmp_protocol_deps="!librtmp_protocol"
2315 rtmp_protocol_select="tcp_protocol"
2316 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2317 rtmps_protocol_deps="!librtmp_protocol"
2318 rtmps_protocol_select="tls_protocol"
2319 rtmpt_protocol_select="ffrtmphttp_protocol"
2320 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2321 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2322 rtp_protocol_select="udp_protocol"
2323 sctp_protocol_deps="struct_sctp_event_subscribe"
2324 sctp_protocol_select="network"
2325 srtp_protocol_select="rtp_protocol"
2326 tcp_protocol_select="network"
2327 tls_gnutls_protocol_deps="gnutls"
2328 tls_gnutls_protocol_select="tcp_protocol"
2329 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
2330 tls_openssl_protocol_select="tcp_protocol"
2331 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2332 udp_protocol_select="network"
2333 unix_protocol_deps="sys_un_h"
2334 unix_protocol_select="network"
2335
2336 # filters
2337 blackframe_filter_deps="gpl"
2338 boxblur_filter_deps="gpl"
2339 bs2b_filter_deps="libbs2b"
2340 cropdetect_filter_deps="gpl"
2341 delogo_filter_deps="gpl"
2342 drawtext_filter_deps="libfreetype"
2343 frei0r_filter_deps="frei0r dlopen"
2344 frei0r_filter_extralibs='$ldl'
2345 frei0r_src_filter_deps="frei0r dlopen"
2346 frei0r_src_filter_extralibs='$ldl'
2347 hqdn3d_filter_deps="gpl"
2348 interlace_filter_deps="gpl"
2349 ocv_filter_deps="libopencv"
2350 resample_filter_deps="avresample"
2351 scale_filter_deps="swscale"
2352
2353 # examples
2354 avcodec_example_deps="avcodec avutil"
2355 filter_audio_example_deps="avfilter avutil"
2356 metadata_example_deps="avformat avutil"
2357 output_example_deps="avcodec avformat avutil swscale"
2358 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder vaapi_x11"
2359 transcode_aac_example_deps="avcodec avformat avresample"
2360
2361 # libraries, in linking order
2362 avcodec_deps="avutil"
2363 avdevice_deps="avformat avcodec avutil"
2364 avfilter_deps="avutil"
2365 avformat_deps="avcodec avutil"
2366 avresample_deps="avutil"
2367 swscale_deps="avutil"
2368
2369 # programs
2370 avconv_deps="avcodec avfilter avformat avresample swscale"
2371 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2372                fps_filter null_filter resample_filter scale_filter
2373                setpts_filter trim_filter"
2374 avplay_deps="avcodec avformat avresample swscale sdl"
2375 avplay_libs='$sdl_libs'
2376 avplay_select="rdft transpose_filter hflip_filter vflip_filter"
2377 avprobe_deps="avcodec avformat"
2378
2379 # documentation
2380 pod2man_deps="doc"
2381 texi2html_deps="doc"
2382
2383 # default parameters
2384
2385 logfile="config.log"
2386
2387 # installation paths
2388 prefix_default="/usr/local"
2389 bindir_default='${prefix}/bin'
2390 datadir_default='${prefix}/share/avconv'
2391 docdir_default='${prefix}/share/doc/libav'
2392 incdir_default='${prefix}/include'
2393 libdir_default='${prefix}/lib'
2394 mandir_default='${prefix}/share/man'
2395 shlibdir_default="$libdir_default"
2396
2397 # toolchain
2398 ar_default="ar"
2399 cc_default="gcc"
2400 host_cc_default="gcc"
2401 cp_f="cp -f"
2402 ln_s="ln -s -f"
2403 nm_default="nm -g"
2404 objformat="elf"
2405 pkg_config_default=pkg-config
2406 ranlib="ranlib"
2407 strip="strip"
2408 yasmexe="yasm"
2409
2410 # machine
2411 arch_default=$(uname -m)
2412 cpu="generic"
2413 intrinsics="none"
2414
2415 # OS
2416 target_os_default=$(tolower $(uname -s))
2417 host_os=$target_os_default
2418
2419 # configurable options
2420 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2421
2422 enable asm
2423 enable debug
2424 enable doc
2425 enable faan faandct faanidct
2426 enable optimizations
2427 enable safe_bitstream_reader
2428 enable static
2429 enable swscale_alpha
2430 enable valgrind_backtrace
2431
2432 # By default, enable only those hwaccels that have no external dependencies.
2433 enable d3d11va dxva2 vda vdpau
2434
2435 # build settings
2436 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2437 LIBPREF="lib"
2438 LIBSUF=".a"
2439 FULLNAME='$(NAME)$(BUILDSUF)'
2440 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2441 SLIBPREF="lib"
2442 SLIBSUF=".so"
2443 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2444 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2445 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2446 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2447 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2448 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2449
2450 asflags_filter=echo
2451 cflags_filter=echo
2452 ldflags_filter=echo
2453
2454 AS_C='-c'
2455 AS_O='-o $@'
2456 CC_C='-c'
2457 CC_E='-E -o $@'
2458 CC_O='-o $@'
2459 OBJCC_C='-c'
2460 OBJCC_E='-E -o $@'
2461 OBJCC_O='-o $@'
2462 LD_O='-o $@'
2463 LD_LIB='-l%'
2464 LD_PATH='-L'
2465 HOSTCC_C='-c'
2466 HOSTCC_E='-E -o $@'
2467 HOSTCC_O='-o $@'
2468 HOSTLD_O='-o $@'
2469
2470 host_libs='-lm'
2471 host_cflags_filter=echo
2472 host_ldflags_filter=echo
2473
2474 target_path='$(CURDIR)'
2475
2476 # since the object filename is not given with the -MM flag, the compiler
2477 # is only able to print the basename, and we must add the path ourselves
2478 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2479 DEPFLAGS='-MM'
2480
2481 # find source path
2482 if test -f configure; then
2483     source_path=.
2484 else
2485     source_path=$(cd $(dirname "$0"); pwd)
2486     echo "$source_path" | grep -q '[[:blank:]]' &&
2487         die "Out of tree builds are impossible with whitespace in source path."
2488     test -e "$source_path/config.h" &&
2489         die "Out of tree builds are impossible with config.h in source dir."
2490 fi
2491
2492 for v in "$@"; do
2493     r=${v#*=}
2494     l=${v%"$r"}
2495     r=$(sh_quote "$r")
2496     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2497 done
2498
2499 find_things(){
2500     thing=$1
2501     pattern=$2
2502     file=$source_path/$3
2503     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2504 }
2505
2506 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2507 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2508 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2509 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2510 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2511 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2512 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2513 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2514 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2515 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2516 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2517
2518 ALL_COMPONENTS="
2519     $BSF_LIST
2520     $DECODER_LIST
2521     $DEMUXER_LIST
2522     $ENCODER_LIST
2523     $FILTER_LIST
2524     $HWACCEL_LIST
2525     $INDEV_LIST
2526     $MUXER_LIST
2527     $OUTDEV_LIST
2528     $PARSER_LIST
2529     $PROTOCOL_LIST
2530 "
2531
2532 for n in $COMPONENT_LIST; do
2533     v=$(toupper ${n%s})_LIST
2534     eval enable \$$v
2535     eval ${n}_if_any="\$$v"
2536 done
2537
2538 enable $ARCH_EXT_LIST
2539
2540 die_unknown(){
2541     echo "Unknown option \"$1\"."
2542     echo "See $0 --help for available options."
2543     exit 1
2544 }
2545
2546 print_3_columns() {
2547     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2548 }
2549
2550 show_list() {
2551     suffix=_$1
2552     shift
2553     echo $* | sed s/$suffix//g | print_3_columns
2554     exit 0
2555 }
2556
2557 rand_list(){
2558     IFS=', '
2559     set -- $*
2560     unset IFS
2561     for thing; do
2562         comp=${thing%:*}
2563         prob=${thing#$comp}
2564         prob=${prob#:}
2565         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2566         echo "prob ${prob:-0.5}"
2567         printf '%s\n' $comp
2568     done
2569 }
2570
2571 do_random(){
2572     action=$1
2573     shift
2574     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2575     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2576 }
2577
2578 for opt do
2579     optval="${opt#*=}"
2580     case "$opt" in
2581         --extra-ldflags=*)
2582             add_ldflags $optval
2583         ;;
2584         --extra-ldexeflags=*)
2585             add_ldexeflags $optval
2586         ;;
2587         --extra-libs=*)
2588             add_extralibs $optval
2589         ;;
2590         --disable-devices)
2591             disable $INDEV_LIST $OUTDEV_LIST
2592         ;;
2593         --enable-debug=*)
2594             debuglevel="$optval"
2595         ;;
2596         --disable-programs)
2597             disable $PROGRAM_LIST
2598         ;;
2599         --disable-everything)
2600             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2601         ;;
2602         --disable-all)
2603             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2604             disable $LIBRARY_LIST $PROGRAM_LIST doc
2605         ;;
2606         --enable-random|--disable-random)
2607             action=${opt%%-random}
2608             do_random ${action#--} $COMPONENT_LIST
2609         ;;
2610         --enable-random=*|--disable-random=*)
2611             action=${opt%%-random=*}
2612             do_random ${action#--} $optval
2613         ;;
2614         --enable-*=*|--disable-*=*)
2615             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2616             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2617             eval list=\$$(toupper $thing)_LIST
2618             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2619             $action $(filter "$name" $list)
2620         ;;
2621         --enable-avserver|--disable-avserver*)
2622             warn "avserver has been removed, the ${opt} option is only"\
2623                  "provided for compatibility and will be removed in the future"
2624         ;;
2625         --enable-?*|--disable-?*)
2626             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2627             if is_in $option $COMPONENT_LIST; then
2628                 test $action = disable && action=unset
2629                 eval $action \$$(toupper ${option%s})_LIST
2630             elif is_in $option $CMDLINE_SELECT; then
2631                 $action $option
2632             else
2633                 die_unknown $opt
2634             fi
2635         ;;
2636         --list-*)
2637             NAME="${opt#--list-}"
2638             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2639             NAME=${NAME%s}
2640             eval show_list $NAME \$$(toupper $NAME)_LIST
2641         ;;
2642         --help|-h) show_help
2643         ;;
2644         *)
2645             optname="${opt%%=*}"
2646             optname="${optname#--}"
2647             optname=$(echo "$optname" | sed 's/-/_/g')
2648             if is_in $optname $CMDLINE_SET; then
2649                 eval $optname='$optval'
2650             elif is_in $optname $CMDLINE_APPEND; then
2651                 append $optname "$optval"
2652             else
2653                 die_unknown $opt
2654             fi
2655         ;;
2656     esac
2657 done
2658
2659 for e in $env; do
2660     eval "export $e"
2661 done
2662
2663 disabled logging && logfile=/dev/null
2664
2665 # Disable all the library-specific components if the library itself
2666 # is disabled, see AVCODEC_LIST and following _LIST variables.
2667
2668 disable_components(){
2669     disabled ${1} && disable $(
2670         eval components="\$$(toupper ${1})_COMPONENTS"
2671         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2672     )
2673 }
2674
2675 map 'disable_components $v' $LIBRARY_LIST
2676
2677 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2678 set >> $logfile
2679
2680 case "$toolchain" in
2681     clang-asan)
2682         cc_default="clang"
2683         add_cflags  -fsanitize=address
2684         add_ldflags -fsanitize=address
2685     ;;
2686     clang-tsan)
2687         cc_default="clang"
2688         add_cflags  -fsanitize=thread -pie
2689         add_ldflags -fsanitize=thread -pie
2690     ;;
2691     clang-usan)
2692         cc_default="clang"
2693         add_cflags  -fsanitize=undefined -O1
2694         add_ldflags -fsanitize=undefined
2695     ;;
2696     gcc-asan)
2697         cc_default="gcc"
2698         add_cflags  -fsanitize=address
2699         add_ldflags -fsanitize=address
2700     ;;
2701     gcc-tsan)
2702         cc_default="gcc"
2703         add_cflags  -fsanitize=thread -pie -fPIC
2704         add_ldflags -fsanitize=thread -pie -fPIC
2705     ;;
2706     gcc-usan)
2707         cc_default="gcc"
2708         add_cflags  -fsanitize=undefined
2709         add_ldflags -fsanitize=undefined
2710     ;;
2711     valgrind-massif)
2712         target_exec_default="valgrind"
2713         target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2714     ;;
2715     valgrind-memcheck)
2716         target_exec_default="valgrind"
2717         target_exec_args="--track-origins=yes --leak-check=full"
2718     ;;
2719     msvc)
2720         # Check whether the current MSVC version needs the C99 converter.
2721         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2722         # support enough of C99 to build libav. Default to the new
2723         # behaviour if the regexp was unable to match anything, since this
2724         # successfully parses the version number of existing supported
2725         # versions that require the converter (MSVC 2010 and 2012).
2726         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2727         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2728             cc_default="cl"
2729         else
2730             cc_default="c99wrap cl"
2731         fi
2732         ld_default="$source_path/compat/windows/mslink"
2733         nm_default="dumpbin -symbols"
2734         ar_default="lib"
2735         case "$arch" in
2736         arm*)
2737             as_default="armasm"
2738             ;;
2739         esac
2740         target_os_default="win32"
2741         # Use a relative path for TMPDIR. This makes sure all the
2742         # ffconf temp files are written with a relative path, avoiding
2743         # issues with msys/win32 path conversion for MSVC parameters
2744         # such as -Fo<file> or -out:<file>.
2745         TMPDIR=.
2746     ;;
2747     icl)
2748         cc_default="icl"
2749         ld_default="xilink"
2750         nm_default="dumpbin -symbols"
2751         ar_default="xilib"
2752         target_os_default="win32"
2753         TMPDIR=.
2754     ;;
2755     gcov)
2756         add_cflags  -fprofile-arcs -ftest-coverage
2757         add_ldflags -fprofile-arcs -ftest-coverage
2758     ;;
2759     hardened)
2760         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2761         add_cflags   -fno-strict-overflow -fstack-protector-all
2762         add_ldflags  -Wl,-z,relro -Wl,-z,now
2763     ;;
2764     ?*)
2765         die "Unknown toolchain $toolchain"
2766     ;;
2767 esac
2768
2769 test -n "$cross_prefix" && enable cross_compile
2770
2771 if enabled cross_compile; then
2772     test -n "$arch" && test -n "$target_os" ||
2773         die "Must specify target arch and OS when cross-compiling"
2774 fi
2775
2776 ar_default="${cross_prefix}${ar_default}"
2777 cc_default="${cross_prefix}${cc_default}"
2778 occ_default="${cross_prefix}${occ_default}"
2779 nm_default="${cross_prefix}${nm_default}"
2780 pkg_config_default="${cross_prefix}${pkg_config_default}"
2781 ranlib="${cross_prefix}${ranlib}"
2782 strip="${cross_prefix}${strip}"
2783
2784 sysinclude_default="${sysroot}/usr/include"
2785
2786 set_default arch cc pkg_config sysinclude target_exec target_os
2787 enabled cross_compile || host_cc_default=$cc
2788 set_default host_cc
2789
2790 if ! $pkg_config --version >/dev/null 2>&1; then
2791     warn "$pkg_config not found, library detection may fail."
2792     pkg_config=false
2793 fi
2794
2795 exesuf() {
2796     case $1 in
2797         mingw32*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2798     esac
2799 }
2800
2801 EXESUF=$(exesuf $target_os)
2802 HOSTEXESUF=$(exesuf $host_os)
2803
2804 # set temporary file name
2805 : ${TMPDIR:=$TEMPDIR}
2806 : ${TMPDIR:=$TMP}
2807 : ${TMPDIR:=/tmp}
2808
2809 if ! check_cmd mktemp -u XXXXXX; then
2810     # simple replacement for missing mktemp
2811     # NOT SAFE FOR GENERAL USE
2812     mktemp(){
2813         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2814     }
2815 fi
2816
2817 tmpfile(){
2818     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2819         (set -C; exec > $tmp) 2>/dev/null ||
2820         die "Unable to create temporary file in $TMPDIR."
2821     append TMPFILES $tmp
2822     eval $1=$tmp
2823 }
2824
2825 trap 'rm -f -- $TMPFILES' EXIT
2826
2827 tmpfile TMPASM .asm
2828 tmpfile TMPC   .c
2829 tmpfile TMPE   $EXESUF
2830 tmpfile TMPH   .h
2831 tmpfile TMPO   .o
2832 tmpfile TMPS   .S
2833 tmpfile TMPSH  .sh
2834 tmpfile TMPV   .ver
2835
2836 unset -f mktemp
2837
2838 chmod +x $TMPE
2839
2840 # make sure we can execute files in $TMPDIR
2841 cat > $TMPSH 2>> $logfile <<EOF
2842 #! /bin/sh
2843 EOF
2844 chmod +x $TMPSH >> $logfile 2>&1
2845 if ! $TMPSH >> $logfile 2>&1; then
2846     cat <<EOF
2847 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2848 variable to another directory and make sure that it is not mounted noexec.
2849 EOF
2850     die "Sanity test failed."
2851 fi
2852
2853 armasm_flags(){
2854     for flag; do
2855         case $flag in
2856             # Filter out MSVC cl.exe options from cflags that shouldn't
2857             # be passed to gas-preprocessor
2858             -M[TD]*)                                            ;;
2859             *)                  echo $flag                      ;;
2860         esac
2861    done
2862 }
2863
2864 ccc_flags(){
2865     for flag; do
2866         case $flag in
2867             -std=c99)           echo -c99                       ;;
2868             -mcpu=*)            echo -arch ${flag#*=}           ;;
2869             -mieee)             echo -ieee                      ;;
2870             -O*|-fast)          echo $flag                      ;;
2871             -fno-math-errno)    echo -assume nomath_errno       ;;
2872             -g)                 echo -g3                        ;;
2873             -Wall)              echo -msg_enable level2         ;;
2874             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2875             -Wl,*)              echo $flag                      ;;
2876             -f*|-W*)                                            ;;
2877             *)                  echo $flag                      ;;
2878         esac
2879    done
2880 }
2881
2882 cparser_flags(){
2883     for flag; do
2884         case $flag in
2885             -Wno-switch)             echo -Wno-switch-enum ;;
2886             -Wno-format-zero-length) ;;
2887             -Wdisabled-optimization) ;;
2888             -Wno-pointer-sign)       echo -Wno-other ;;
2889             *)                       echo $flag ;;
2890         esac
2891     done
2892 }
2893
2894 msvc_common_flags(){
2895     for flag; do
2896         case $flag in
2897             # In addition to specifying certain flags under the compiler
2898             # specific filters, they must be specified here as well or else the
2899             # generic catch all at the bottom will print the original flag.
2900             -Wall)                ;;
2901             -std=c99)             ;;
2902             # Common flags
2903             -fomit-frame-pointer) ;;
2904             -g)                   echo -Z7 ;;
2905             -fno-math-errno)      ;;
2906             -fno-common)          ;;
2907             -fno-signed-zeros)    ;;
2908             -fPIC)                ;;
2909             -mthumb)              ;;
2910             -march=*)             ;;
2911             -lz)                  echo zlib.lib ;;
2912             -lavifil32)           echo vfw32.lib ;;
2913             -lavicap32)           echo vfw32.lib user32.lib ;;
2914             -l*)                  echo ${flag#-l}.lib ;;
2915             -L*)                  echo -libpath:${flag#-L} ;;
2916             *)                    echo $flag ;;
2917         esac
2918     done
2919 }
2920
2921 msvc_flags(){
2922     msvc_common_flags "$@"
2923     for flag; do
2924         case $flag in
2925             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
2926                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
2927                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
2928                                        -wd4273 -wd4554 -wd4701 ;;
2929         esac
2930     done
2931 }
2932
2933 icl_flags(){
2934     msvc_common_flags "$@"
2935     for flag; do
2936         case $flag in
2937             # Despite what Intel's documentation says -Wall, which is supported
2938             # on Windows, does enable remarks so disable them here.
2939             -Wall)                echo $flag -Qdiag-disable:remark ;;
2940             -std=c99)             echo -Qstd=c99 ;;
2941         esac
2942     done
2943 }
2944
2945 pgi_flags(){
2946     for flag; do
2947         case $flag in
2948             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
2949             -fomit-frame-pointer) echo -Mnoframe ;;
2950             -g)                   echo -gopt ;;
2951             *)                    echo $flag ;;
2952         esac
2953     done
2954 }
2955
2956 suncc_flags(){
2957     for flag; do
2958         case $flag in
2959             -march=*|-mcpu=*)
2960                 case "${flag#*=}" in
2961                     native)                   echo -xtarget=native       ;;
2962                     v9|niagara)               echo -xarch=sparc          ;;
2963                     ultrasparc)               echo -xarch=sparcvis       ;;
2964                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
2965                     i586|pentium)             echo -xchip=pentium        ;;
2966                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
2967                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
2968                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
2969                     pentium4*)          echo -xtarget=pentium4           ;;
2970                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
2971                     *-sse3)             echo -xarch=sse3                 ;;
2972                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
2973                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
2974                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
2975                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
2976                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
2977                     k8|opteron|athlon64|athlon-fx)
2978                                                echo -xarch=sse2a         ;;
2979                     athlon*)                   echo -xarch=pentium_proa  ;;
2980                 esac
2981                 ;;
2982             -std=c99)             echo -xc99              ;;
2983             -fomit-frame-pointer) echo -xregs=frameptr    ;;
2984             -fPIC)                echo -KPIC -xcode=pic32 ;;
2985             -W*,*)                echo $flag              ;;
2986             -f*-*|-W*|-mimpure-text)                      ;;
2987             -shared)              echo -G                 ;;
2988             *)                    echo $flag              ;;
2989         esac
2990     done
2991 }
2992
2993 tms470_flags(){
2994     for flag; do
2995         case $flag in
2996             -march=*|-mcpu=*)
2997                 case "${flag#*=}" in
2998                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
2999                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3000                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3001                     armv6*|arm11*)          echo -mv=6   ;;
3002                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3003                                             echo -mv=5e  ;;
3004                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3005                 esac
3006                 ;;
3007             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3008             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3009             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3010             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3011             -msoft-float)   echo --float_support=vfplib       ;;
3012             -O[0-3]|-mf=*)  echo $flag                        ;;
3013             -g)             echo -g -mn                       ;;
3014             -pds=*)         echo $flag                        ;;
3015             -D*|-I*)        echo $flag                        ;;
3016             --gcc|--abi=*)  echo $flag                        ;;
3017             -me)            echo $flag                        ;;
3018         esac
3019     done
3020 }
3021
3022 probe_cc(){
3023     pfx=$1
3024     _cc=$2
3025
3026     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3027     unset _ld_o _ldflags _ld_lib _ld_path
3028     unset _depflags _DEPCMD _DEPFLAGS
3029     _flags_filter=echo
3030
3031     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3032         _type=llvm_gcc
3033         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3034         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3035         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3036         _cflags_speed='-O3'
3037         _cflags_size='-Os'
3038     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3039         _type=gcc
3040         gcc_version=$($_cc --version | head -n1)
3041         gcc_basever=$($_cc -dumpversion)
3042         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3043         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3044         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3045         if ! $_cc -dumpversion | grep -q '^2\.'; then
3046             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3047         fi
3048         _cflags_speed='-O3'
3049         _cflags_size='-Os'
3050     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3051         _type=icc
3052         _ident=$($_cc --version | head -n1)
3053         _depflags='-MMD'
3054         _cflags_speed='-O3'
3055         _cflags_size='-Os'
3056         _cflags_noopt='-O1'
3057     elif $_cc -v 2>&1 | grep -q xlc; then
3058         _type=xlc
3059         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3060         _cflags_speed='-O5'
3061         _cflags_size='-O5 -qcompact'
3062     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3063         _type=ccc
3064         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3065         _DEPFLAGS='-M'
3066         _cflags_speed='-fast'
3067         _cflags_size='-O1'
3068         _flags_filter=ccc_flags
3069     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3070         test -d "$sysroot" || die "No valid sysroot specified."
3071         _type=armcc
3072         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3073         armcc_conf="$PWD/armcc.conf"
3074         $_cc --arm_linux_configure                 \
3075              --arm_linux_config_file="$armcc_conf" \
3076              --configure_sysroot="$sysroot"        \
3077              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3078              die "Error creating armcc configuration file."
3079         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3080         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3081         as_default="${cross_prefix}gcc"
3082         _depflags='-MMD'
3083         _cflags_speed='-O3'
3084         _cflags_size='-Os'
3085     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3086         _type=tms470
3087         _ident=$($_cc -version | head -n1 | tr -s ' ')
3088         _flags='--gcc --abi=eabi -me'
3089         _cc_e='-ppl -fe=$@'
3090         _cc_o='-fe=$@'
3091         _depflags='-ppa -ppd=$(@:.o=.d)'
3092         _cflags_speed='-O3 -mf=5'
3093         _cflags_size='-O3 -mf=2'
3094         _flags_filter=tms470_flags
3095     elif $_cc -v 2>&1 | grep -q clang; then
3096         _type=clang
3097         _ident=$($_cc --version 2>/dev/null | head -n1)
3098         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3099         _cflags_speed='-O3'
3100         _cflags_size='-Os'
3101     elif $_cc -V 2>&1 | grep -q Sun; then
3102         _type=suncc
3103         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3104         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3105         _DEPFLAGS='-xM1 -xc99'
3106         _ldflags='-std=c99'
3107         _cflags_speed='-O5'
3108         _cflags_size='-O5 -xspace'
3109         _flags_filter=suncc_flags
3110     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3111         _type=pathscale
3112         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3113         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3114         _cflags_speed='-O2'
3115         _cflags_size='-Os'
3116         _flags_filter='filter_out -Wdisabled-optimization'
3117     elif $_cc -v 2>&1 | grep -q Open64; then
3118         _type=open64
3119         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3120         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3121         _cflags_speed='-O2'
3122         _cflags_size='-Os'
3123         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3124     elif $_cc -V 2>&1 | grep -q Portland; then
3125         _type=pgi
3126         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3127         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3128         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3129         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3130         _cflags_noopt="-O1"
3131         _flags_filter=pgi_flags
3132     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3133         _type=armasm
3134         _ident=$($_cc | head -n1)
3135         # 4509: "This form of conditional instruction is deprecated"
3136         _flags="-nologo -ignore 4509"
3137         _flags_filter=armasm_flags
3138     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3139         _type=msvc
3140         _ident=$($_cc 2>&1 | head -n1)
3141         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3142         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3143         _cflags_speed="-O2"
3144         _cflags_size="-O1"
3145         if $_cc -nologo- 2>&1 | grep -q Linker; then
3146             _ld_o='-out:$@'
3147         else
3148             _ld_o='-Fe$@'
3149         fi
3150         _cc_o='-Fo$@'
3151         _cc_e='-P -Fi$@'
3152         _flags_filter=msvc_flags
3153         _ld_lib='lib%.a'
3154         _ld_path='-libpath:'
3155         _flags='-nologo'
3156         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS'
3157     elif $_cc 2>&1 | grep -q Intel; then
3158         _type=icl
3159         _ident=$($_cc 2>&1 | head -n1)
3160         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3161         # Not only is O3 broken on 13.x+ but it is slower on all previous
3162         # versions (tested) as well.
3163         _cflags_speed="-O2"
3164         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3165         if $_cc 2>&1 | grep -q Linker; then
3166             _ld_o='-out:$@'
3167         else
3168             _ld_o='-Fe$@'
3169         fi
3170         _cc_o='-Fo$@'
3171         _cc_e='-P'
3172         _flags_filter=icl_flags
3173         _ld_lib='lib%.a'
3174         _ld_path='-libpath:'
3175         # -Qdiag-error to make icl error when seeing certain unknown arguments
3176         _flags='-nologo -Qdiag-error:4044,10157'
3177         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3178         # with MSVC which enables it by default.
3179         _cflags='-D_USE_MATH_DEFINES -Qms0 -Qvec- -Qsimd- -GS'
3180     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3181         _type=cparser
3182         _ident=$($_cc --version | head -n1)
3183         _depflags='-MMD'
3184         _cflags_speed='-O4'
3185         _cflags_size='-O2'
3186         _flags_filter=cparser_flags
3187     fi
3188
3189     eval ${pfx}_type=\$_type
3190     eval ${pfx}_ident=\$_ident
3191 }
3192
3193 set_ccvars(){
3194     eval ${1}_C=\${_cc_c-\${${1}_C}}
3195     eval ${1}_E=\${_cc_e-\${${1}_E}}
3196     eval ${1}_O=\${_cc_o-\${${1}_O}}
3197
3198     if [ -n "$_depflags" ]; then
3199         eval ${1}_DEPFLAGS=\$_depflags
3200     else
3201         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3202         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3203         eval DEP${1}FLAGS=\$_flags
3204     fi
3205 }
3206
3207 probe_cc cc "$cc"
3208 cflags_filter=$_flags_filter
3209 cflags_speed=$_cflags_speed
3210 cflags_size=$_cflags_size
3211 cflags_noopt=$_cflags_noopt
3212 add_cflags $_flags $_cflags
3213 cc_ldflags=$_ldflags
3214 set_ccvars CC
3215
3216 probe_cc hostcc "$host_cc"
3217 host_cflags_filter=$_flags_filter
3218 add_host_cflags  $_flags $_cflags
3219 set_ccvars HOSTCC
3220
3221 test -n "$cc_type" && enable $cc_type ||
3222     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3223
3224 : ${as_default:=$cc}
3225 : ${objcc_default:=$cc}
3226 : ${dep_cc_default:=$cc}
3227 : ${ld_default:=$cc}
3228 : ${host_ld_default:=$host_cc}
3229 set_default ar as objcc dep_cc ld host_ld
3230
3231 probe_cc as "$as"
3232 asflags_filter=$_flags_filter
3233 add_asflags $_flags $_cflags
3234 set_ccvars AS
3235
3236 probe_cc objcc "$objcc"
3237 objcflags_filter=$_flags_filter
3238 add_objcflags $_flags $_cflags
3239 set_ccvars OBJC
3240
3241 probe_cc ld "$ld"
3242 ldflags_filter=$_flags_filter
3243 add_ldflags $_flags $_ldflags
3244 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3245 LD_O=${_ld_o-$LD_O}
3246 LD_LIB=${_ld_lib-$LD_LIB}
3247 LD_PATH=${_ld_path-$LD_PATH}
3248
3249 probe_cc hostld "$host_ld"
3250 host_ldflags_filter=$_flags_filter
3251 add_host_ldflags $_flags $_ldflags
3252 HOSTLD_O=${_ld_o-$HOSTLD_O}
3253
3254 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3255     probe_cc depcc "$dep_cc"
3256     CCDEP=${_DEPCMD:-$DEPCMD}
3257     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3258     DEPCCFLAGS=$_flags
3259 fi
3260
3261 if $ar 2>&1 | grep -q Microsoft; then
3262     arflags="-nologo"
3263     ar_o='-out:$@'
3264 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3265     arflags="rq"
3266     ar_o='$@'
3267 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3268     arflags='-Xany -r -c'
3269     ar_o='$@'
3270 else
3271     arflags="rc"
3272     ar_o='$@'
3273 fi
3274
3275 add_cflags $extra_cflags
3276 add_objcflags $extra_objcflags
3277 add_asflags $extra_cflags
3278
3279 if test -n "$sysroot"; then
3280     case "$cc_type" in
3281         gcc|llvm_gcc|clang)
3282             add_cppflags --sysroot="$sysroot"
3283             add_ldflags --sysroot="$sysroot"
3284         ;;
3285         tms470)
3286             add_cppflags -I"$sysinclude"
3287             add_ldflags  --sysroot="$sysroot"
3288         ;;
3289     esac
3290 fi
3291
3292 if test "$cpu" = host; then
3293     enabled cross_compile &&
3294         die "--cpu=host makes no sense when cross-compiling."
3295
3296     case "$cc_type" in
3297         gcc|llvm_gcc)
3298             check_native(){
3299                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3300                 sed -n "/cc1.*$1=/{
3301                             s/.*$1=\\([^ ]*\\).*/\\1/
3302                             p
3303                             q
3304                         }" $TMPE
3305             }
3306             cpu=$(check_native -march || check_native -mcpu)
3307         ;;
3308     esac
3309
3310     test "${cpu:-host}" = host &&
3311         die "--cpu=host not supported with compiler $cc"
3312 fi
3313
3314 # Deal with common $arch aliases
3315 case "$arch" in
3316     aarch64|arm64)
3317         arch="aarch64"
3318     ;;
3319     arm*)
3320         arch="arm"
3321     ;;
3322     mips*|IP*)
3323         arch="mips"
3324     ;;
3325     parisc*|hppa*)
3326         arch="parisc"
3327     ;;
3328     "Power Macintosh"|ppc*|powerpc*)
3329         arch="ppc"
3330     ;;
3331     s390|s390x)
3332         arch="s390"
3333     ;;
3334     sh4|sh)
3335         arch="sh4"
3336     ;;
3337     sun4u|sparc*)
3338         arch="sparc"
3339     ;;
3340     tilegx|tile-gx)
3341         arch="tilegx"
3342     ;;
3343     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3344         arch="x86"
3345     ;;
3346 esac
3347
3348 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3349 enable $arch
3350
3351 # Add processor-specific flags
3352 if enabled aarch64; then
3353
3354     case $cpu in
3355         armv*)
3356             cpuflags="-march=$cpu"
3357         ;;
3358         *)
3359             cpuflags="-mcpu=$cpu"
3360         ;;
3361     esac
3362
3363 elif enabled alpha; then
3364
3365     cpuflags="-mcpu=$cpu"
3366
3367 elif enabled arm; then
3368
3369     check_arm_arch() {
3370         check_cpp_condition stddef.h \
3371             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3372             $cpuflags
3373     }
3374
3375     probe_arm_arch() {
3376         if   check_arm_arch 4;        then echo armv4;
3377         elif check_arm_arch 4T;       then echo armv4t;
3378         elif check_arm_arch 5;        then echo armv5;
3379         elif check_arm_arch 5E;       then echo armv5e;
3380         elif check_arm_arch 5T;       then echo armv5t;
3381         elif check_arm_arch 5TE;      then echo armv5te;
3382         elif check_arm_arch 5TEJ;     then echo armv5te;
3383         elif check_arm_arch 6;        then echo armv6;
3384         elif check_arm_arch 6J;       then echo armv6j;
3385         elif check_arm_arch 6K;       then echo armv6k;
3386         elif check_arm_arch 6Z;       then echo armv6z;
3387         elif check_arm_arch 6ZK;      then echo armv6zk;
3388         elif check_arm_arch 6T2;      then echo armv6t2;
3389         elif check_arm_arch 7;        then echo armv7;
3390         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3391         elif check_arm_arch 7S;       then echo armv7-a;
3392         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3393         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3394         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3395         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3396         fi
3397     }
3398
3399     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3400
3401     case $cpu in
3402         armv*)
3403             cpuflags="-march=$cpu"
3404             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3405         ;;
3406         *)
3407             cpuflags="-mcpu=$cpu"
3408             case $cpu in
3409                 cortex-a*)                               subarch=armv7a  ;;
3410                 cortex-r*)                               subarch=armv7r  ;;
3411                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3412                 arm11*)                                  subarch=armv6   ;;
3413                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3414                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3415                 *)                             subarch=$(probe_arm_arch) ;;
3416             esac
3417         ;;
3418     esac
3419
3420     case "$subarch" in
3421         armv5t*)    enable fast_clz                ;;
3422         armv[6-8]*) enable fast_clz fast_unaligned ;;
3423     esac
3424
3425 elif enabled avr32; then
3426
3427     case $cpu in
3428         ap7[02]0[0-2])
3429             subarch="avr32_ap"
3430             cpuflags="-mpart=$cpu"
3431         ;;
3432         ap)
3433             subarch="avr32_ap"
3434             cpuflags="-march=$cpu"
3435         ;;
3436         uc3[ab]*)
3437             subarch="avr32_uc"
3438             cpuflags="-mcpu=$cpu"
3439         ;;
3440         uc)
3441             subarch="avr32_uc"
3442             cpuflags="-march=$cpu"
3443         ;;
3444     esac
3445
3446 elif enabled bfin; then
3447
3448     cpuflags="-mcpu=$cpu"
3449
3450 elif enabled mips; then
3451
3452     cpuflags="-march=$cpu"
3453
3454 elif enabled ppc; then
3455
3456     disable ldbrx
3457
3458     case $(tolower $cpu) in
3459         601|ppc601|powerpc601)
3460             cpuflags="-mcpu=601"
3461             disable altivec
3462         ;;
3463         603*|ppc603*|powerpc603*)
3464             cpuflags="-mcpu=603"
3465             disable altivec
3466         ;;
3467         604*|ppc604*|powerpc604*)
3468             cpuflags="-mcpu=604"
3469             disable altivec
3470         ;;
3471         g3|75*|ppc75*|powerpc75*)
3472             cpuflags="-mcpu=750"
3473             disable altivec
3474         ;;
3475         g4|745*|ppc745*|powerpc745*)
3476             cpuflags="-mcpu=7450"
3477             disable vsx
3478         ;;
3479         74*|ppc74*|powerpc74*)
3480             cpuflags="-mcpu=7400"
3481             disable vsx
3482         ;;
3483         g5|970|ppc970|powerpc970)
3484             cpuflags="-mcpu=970"
3485             disable vsx
3486         ;;
3487         power[3-6]*)
3488             cpuflags="-mcpu=$cpu"
3489             disable vsx
3490         ;;
3491         power[7-8]*)
3492             cpuflags="-mcpu=$cpu"
3493             enable ldbrx
3494         ;;
3495         cell)
3496             cpuflags="-mcpu=cell"
3497             enable ldbrx
3498             disable vsx
3499         ;;
3500         e500mc)
3501             cpuflags="-mcpu=e500mc"
3502             disable altivec
3503         ;;
3504         e500v2)
3505             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3506             disable altivec
3507             disable dcbzl
3508         ;;
3509         e500)
3510             cpuflags="-mcpu=8540 -mhard-float"
3511             disable altivec
3512             disable dcbzl
3513         ;;
3514     esac
3515
3516 elif enabled sparc; then
3517
3518     case $cpu in
3519         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3520             cpuflags="-mcpu=$cpu"
3521         ;;
3522         ultrasparc*|niagara[234])
3523             cpuflags="-mcpu=$cpu"
3524         ;;
3525     esac
3526
3527 elif enabled x86; then
3528
3529     case $cpu in
3530         i[345]86|pentium)
3531             cpuflags="-march=$cpu"
3532             disable i686
3533             disable mmx
3534         ;;
3535         # targets that do NOT support nopl and conditional mov (cmov)
3536         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3537             cpuflags="-march=$cpu"
3538             disable i686
3539         ;;
3540         # targets that do support nopl and conditional mov (cmov)
3541         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3542             cpuflags="-march=$cpu"
3543             enable i686
3544             enable fast_cmov
3545         ;;
3546         # targets that do support conditional mov but on which it's slow
3547         pentium4|pentium4m|prescott|nocona)
3548             cpuflags="-march=$cpu"
3549             enable i686
3550             disable fast_cmov
3551         ;;
3552     esac
3553
3554 fi
3555
3556 if [ "$cpu" != generic ]; then
3557     add_cflags  $cpuflags
3558     add_asflags $cpuflags
3559     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3560 fi
3561
3562 # compiler sanity check
3563 check_exec <<EOF
3564 int main(void){ return 0; }
3565 EOF
3566 if test "$?" != 0; then
3567     echo "$cc is unable to create an executable file."
3568     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3569         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3570         echo "Only do this if you know what cross compiling means."
3571     fi
3572     die "C compiler test failed."
3573 fi
3574
3575 add_cppflags -D_ISOC99_SOURCE
3576 check_cflags -std=c99
3577 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3578 #include <stdlib.h>
3579 EOF
3580 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3581 #include <stdlib.h>
3582 EOF
3583
3584 add_host_cppflags -D_ISOC99_SOURCE
3585 check_host_cflags -std=c99
3586 check_host_cflags -Wall
3587 check_host_cflags -O3
3588
3589 check_64bit(){
3590     arch32=$1
3591     arch64=$2
3592     expr=$3
3593     check_code cc "" "int test[2*($expr) - 1]" &&
3594         subarch=$arch64 || subarch=$arch32
3595 }
3596
3597 case "$arch" in
3598     aarch64|alpha|ia64)
3599         spic=$shared
3600     ;;
3601     mips)
3602         check_64bit mips mips64 '_MIPS_SIM > 1'
3603         spic=$shared
3604     ;;
3605     parisc)
3606         check_64bit parisc parisc64 'sizeof(void *) > 4'
3607         spic=$shared
3608     ;;
3609     ppc)
3610         check_64bit ppc ppc64 'sizeof(void *) > 4'
3611         spic=$shared
3612     ;;
3613     s390)
3614         check_64bit s390 s390x 'sizeof(void *) > 4'
3615         spic=$shared
3616     ;;
3617     sparc)
3618         check_64bit sparc sparc64 'sizeof(void *) > 4'
3619         spic=$shared
3620     ;;
3621     x86)
3622         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3623         if test "$subarch" = "x86_64"; then
3624             spic=$shared
3625         fi
3626     ;;
3627 esac
3628
3629 enable $subarch
3630 enabled spic && enable_weak pic
3631
3632 # OS specific
3633 case $target_os in
3634     aix)
3635         SHFLAGS=-shared
3636         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3637         enabled shared && add_ldflags -Wl,-brtl
3638         ;;
3639     android)
3640         disable symver
3641         enable section_data_rel_ro
3642         SLIB_INSTALL_NAME='$(SLIBNAME)'
3643         SLIB_INSTALL_LINKS=
3644         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3645         ;;
3646     haiku)
3647         prefix_default="/boot/common"
3648         network_extralibs="-lnetwork"
3649         host_libs=
3650         ;;
3651     sunos)
3652         SHFLAGS='-shared -Wl,-h,$$(@F)'
3653         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3654         network_extralibs="-lsocket -lnsl"
3655         # When using suncc to build, the Solaris linker will mark
3656         # an executable with each instruction set encountered by
3657         # the Solaris assembler.  As our libraries contain their own
3658         # guards for processor-specific code, instead suppress
3659         # generation of the HWCAPS ELF section on Solaris x86 only.
3660         enabled_all suncc x86 &&
3661             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3662             add_ldflags -Wl,-M,mapfile
3663         nm_default='nm -P -g'
3664         SLIB_CREATE_DEF_CMD='$(Q)perl $(SRC_PATH)/compat/solaris/make_sunver.pl $$(filter %.ver,$$^) $(OBJS) | grep -v @ > $(SUBDIR)lib$(NAME).ver-sol2'
3665         ;;
3666     netbsd)
3667         disable symver
3668         oss_indev_extralibs="-lossaudio"
3669         oss_outdev_extralibs="-lossaudio"
3670         ;;
3671     openbsd|bitrig)
3672         disable symver
3673         SHFLAGS='-shared'
3674         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3675         SLIB_INSTALL_LINKS=
3676         oss_indev_extralibs="-lossaudio"
3677         oss_outdev_extralibs="-lossaudio"
3678         ;;
3679     dragonfly)
3680         disable symver
3681         ;;
3682     freebsd)
3683         ;;
3684     bsd/os)
3685         add_extralibs -lpoll -lgnugetopt
3686         ;;
3687     darwin)
3688         enabled ppc && add_asflags -force_cpusubtype_ALL
3689         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3690         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3691         add_ldflags -Wl,-dynamic,-search_paths_first
3692         SLIBSUF=".dylib"
3693         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3694         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3695         objformat="macho"
3696         enabled x86_64 && objformat="macho64"
3697         enabled_any pic shared ||
3698             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3699         ;;
3700     msys*)
3701         die "Native MSYS builds are discouraged, please use the MINGW environment.";
3702         ;;
3703     mingw32*)
3704         if test $target_os = "mingw32ce"; then
3705             disable network
3706         else
3707             target_os=mingw32
3708         fi
3709         LIBTARGET=i386
3710         if enabled x86_64; then
3711             LIBTARGET="i386:x86-64"
3712         elif enabled arm; then
3713             LIBTARGET=arm-wince
3714         fi
3715         check_ldflags -Wl,--nxcompat
3716         check_ldflags -Wl,--dynamicbase
3717         shlibdir_default="$bindir_default"
3718         SLIBPREF=""
3719         SLIBSUF=".dll"
3720         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3721         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3722         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3723         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3724         SLIB_INSTALL_LINKS=
3725         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3726         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3727         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3728         objformat="win32"
3729         dlltool="${cross_prefix}dlltool"
3730         ranlib=:
3731         enable dos_paths
3732         ;;
3733     win32|win64)
3734         disable symver
3735         if enabled shared; then
3736             # Link to the import library instead of the normal static library
3737             # for shared libs.
3738             LD_LIB='%.lib'
3739             # Cannot build both shared and static libs with MSVC or icl.
3740             disable static
3741         fi
3742         shlibdir_default="$bindir_default"
3743         SLIBPREF=""
3744         SLIBSUF=".dll"
3745         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3746         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3747         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3748         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3749         SLIB_INSTALL_LINKS=
3750         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3751         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3752         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3753         objformat="win32"
3754         ranlib=:
3755         enable dos_paths
3756         ;;
3757     cygwin*)
3758         target_os=cygwin
3759         shlibdir_default="$bindir_default"
3760         SLIBPREF="cyg"
3761         SLIBSUF=".dll"
3762         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3763         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3764         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3765         SLIB_INSTALL_LINKS=
3766         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3767         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3768         objformat="win32"
3769         enable dos_paths
3770         ;;
3771     *-dos|freedos|opendos)
3772         network_extralibs="-lsocket"
3773         objformat="coff"
3774         enable dos_paths
3775         add_cppflags -U__STRICT_ANSI__
3776         ;;
3777     linux)
3778         enable dv1394
3779         enable section_data_rel_ro
3780         ;;
3781     irix*)
3782         target_os=irix
3783         ranlib="echo ignoring ranlib"
3784         ;;
3785     os/2*)
3786         ln_s="cp -f"
3787         objformat="aout"
3788         add_cppflags -D_GNU_SOURCE
3789         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3790         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3791         LIBSUF="_s.a"
3792         SLIBPREF=""
3793         SLIBSUF=".dll"
3794         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3795         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3796         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3797             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3798             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3799             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3800             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3801         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3802             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3803         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3804         enable dos_paths
3805         ;;
3806     gnu/kfreebsd)
3807         add_cppflags -D_BSD_SOURCE
3808         ;;
3809     gnu)
3810         ;;
3811     qnx)
3812         add_cppflags -D_QNX_SOURCE
3813         network_extralibs="-lsocket"
3814         ;;
3815     symbian)
3816         SLIBSUF=".dll"
3817         enable dos_paths
3818         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3819         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3820         add_ldflags -Wl,--target1-abs,--no-undefined \
3821                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3822                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3823         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3824                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3825                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3826         ;;
3827     osf1)
3828         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3829         ;;
3830     minix)
3831         ;;
3832     plan9)
3833         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3834                      -D_REENTRANT_SOURCE        \
3835                      -D_RESEARCH_SOURCE         \
3836                      -DFD_SETSIZE=96            \
3837                      -DHAVE_SOCK_OPTS
3838         add_compat strtod.o strtod=avpriv_strtod
3839         network_extralibs='-lbsd'
3840         exeobjs=compat/plan9/main.o
3841         cp_f='cp'
3842         ;;
3843     none)
3844         ;;
3845     *)
3846         die "Unknown OS '$target_os'."
3847         ;;
3848 esac
3849
3850 # determine libc flavour
3851
3852 probe_libc(){
3853     pfx=$1
3854     pfx_no_=${pfx%_}
3855     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3856     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3857         eval ${pfx}libc_type=uclibc
3858         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3859     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3860         eval ${pfx}libc_type=glibc
3861         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3862     # MinGW headers can be installed on Cygwin, so check for newlib first.
3863     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3864         eval ${pfx}libc_type=newlib
3865         add_${pfx}cppflags -U__STRICT_ANSI__
3866     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3867     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3868         eval ${pfx}libc_type=mingw64
3869         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3870         eval test \$${pfx_no_}cc_type = "gcc" &&
3871             add_${pfx}cppflags -D__printf__=__gnu_printf__
3872     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3873          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3874         eval ${pfx}libc_type=mingw32
3875         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3876             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3877             die "ERROR: MinGW32 runtime version must be >= 3.15."
3878         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3879         eval test \$${pfx_no_}cc_type = "gcc" &&
3880             add_${pfx}cppflags -D__printf__=__gnu_printf__
3881     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3882         eval ${pfx}libc_type=msvcrt
3883         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
3884             if [ "$pfx" = host_ ]; then
3885                 add_host_cppflags -Dsnprintf=_snprintf
3886             else
3887                 add_compat strtod.o strtod=avpriv_strtod
3888                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3889                                              _snprintf=avpriv_snprintf  \
3890                                              vsnprintf=avpriv_vsnprintf
3891             fi
3892         fi
3893         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3894         # 0x601 by default unless something else is set by the user.
3895         # This can easily lead to us detecting functions only present
3896         # in such new versions and producing binaries requiring windows 7.0.
3897         # Therefore explicitly set the default to XP unless the user has
3898         # set something else on the command line.
3899         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
3900         # family. For these cases, configure is free to use any functions
3901         # found in the SDK headers by default. (Alternatively, we could force
3902         # _WIN32_WINNT to 0x0602 in that case.)
3903         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
3904             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
3905 #ifdef WINAPI_FAMILY
3906 #include <winapifamily.h>
3907 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
3908 #error not desktop
3909 #endif
3910 #endif
3911 EOF
3912     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
3913         eval ${pfx}libc_type=klibc
3914     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
3915         eval ${pfx}libc_type=bionic
3916     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
3917         eval ${pfx}libc_type=solaris
3918         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
3919     else
3920         eval ${pfx}libc_type=default
3921         add_${pfx}cppflags -D_DEFAULT_SOURCE
3922     fi
3923 }
3924
3925 probe_libc
3926 test -n "$libc_type" && enable libc_$libc_type
3927 probe_libc host_
3928 test -n "$host_libc_type" && enable host_libc_$host_libc_type
3929
3930 case $libc_type in
3931     bionic)
3932         add_compat strtod.o strtod=avpriv_strtod
3933         ;;
3934 esac
3935
3936 # hacks for compiler/libc/os combinations
3937
3938 if enabled_all tms470 libc_glibc; then
3939     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
3940     add_cppflags -D__USER_LABEL_PREFIX__=
3941     add_cppflags -D__builtin_memset=memset
3942     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
3943     add_cflags   -pds=48    # incompatible redefinition of macro
3944 fi
3945
3946 if enabled_all ccc libc_glibc; then
3947     add_ldflags -Wl,-z,now  # calls to libots crash without this
3948 fi
3949
3950 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
3951     add_cppflags '-I\$(SRC_PATH)/compat/float'
3952
3953 esc(){
3954     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
3955 }
3956
3957 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
3958
3959 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
3960
3961 set_default $PATHS_LIST
3962 set_default nm
3963
3964 # we need to build at least one lib type
3965 if ! enabled_any static shared; then
3966     cat <<EOF
3967 At least one library type must be built.
3968 Specify --enable-static to build the static libraries or --enable-shared to
3969 build the shared libraries as well. To only build the shared libraries specify
3970 --disable-static in addition to --enable-shared.
3971 EOF
3972     exit 1;
3973 fi
3974
3975 die_license_disabled() {
3976     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
3977 }
3978
3979 die_license_disabled gpl libcdio
3980 die_license_disabled gpl libx264
3981 die_license_disabled gpl libx265
3982 die_license_disabled gpl libxavs
3983 die_license_disabled gpl libxvid
3984 die_license_disabled gpl x11grab
3985
3986 die_license_disabled nonfree libfaac
3987 die_license_disabled nonfree libfdk_aac
3988 die_license_disabled nonfree nvenc
3989 die_license_disabled nonfree openssl
3990
3991 die_license_disabled version3 libopencore_amrnb
3992 die_license_disabled version3 libopencore_amrwb
3993 die_license_disabled version3 libvo_aacenc
3994 die_license_disabled version3 libvo_amrwbenc
3995
3996 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
3997
3998 disabled optimizations || check_cflags -fomit-frame-pointer
3999
4000 enable_weak_pic() {
4001     disabled pic && return
4002     enable pic
4003     add_cppflags -DPIC
4004     case "$target_os" in
4005     mingw*|cygwin*)
4006         ;;
4007     *)
4008         add_cflags -fPIC
4009         ;;
4010     esac
4011     add_asflags  -fPIC
4012 }
4013
4014 enabled pic && enable_weak_pic
4015
4016 check_cc <<EOF || die "Symbol mangling check failed."
4017 int ff_extern;
4018 EOF
4019 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4020 extern_prefix=${sym%%ff_extern*}
4021
4022 check_cc <<EOF && enable_weak inline_asm
4023 void foo(void) { __asm__ volatile ("" ::); }
4024 EOF
4025
4026 _restrict=
4027 for restrict_keyword in restrict __restrict__ __restrict; do
4028     check_cc <<EOF && _restrict=$restrict_keyword && break
4029 void foo(char * $restrict_keyword p);
4030 EOF
4031 done
4032
4033 check_cc <<EOF && enable pragma_deprecated
4034 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4035 EOF
4036
4037 check_cc <<EOF && enable attribute_packed
4038 struct { int x; } __attribute__((packed)) x;
4039 EOF
4040
4041 check_cc <<EOF && enable attribute_may_alias
4042 union { int x; } __attribute__((may_alias)) x;
4043 EOF
4044
4045 check_cc <<EOF || die "endian test failed"
4046 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4047 EOF
4048 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4049
4050 check_gas() {
4051     log "check_gas using '$as' as AS"
4052     # :vararg is used on aarch64, arm and ppc altivec
4053     check_as <<EOF || return 1
4054 .macro m n, y:vararg=0
4055 \n: .int \y
4056 .endm
4057 m x
4058 EOF
4059     # .altmacro is only used in arm asm
4060     ! enabled arm || check_as <<EOF || return 1
4061 .altmacro
4062 EOF
4063     enable gnu_as
4064     return 0
4065 }
4066
4067 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4068     nogas=:
4069     enabled_any arm aarch64 && nogas=die
4070     enabled_all ppc altivec && nogas=warn
4071     as_noop=-v
4072
4073     case $as_type in
4074         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4075         gcc)  gaspp_as_type=gas ;;
4076         *)    gaspp_as_type=$as_type ;;
4077     esac
4078
4079     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4080
4081     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4082         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4083
4084     if ! check_gas ; then
4085         as=${gas:=$as}
4086         check_gas || \
4087             $nogas "GNU assembler not found, install/update gas-preprocessor"
4088     fi
4089
4090     check_as <<EOF && enable as_func
4091 .func test
4092 .endfunc
4093 EOF
4094 fi
4095
4096 check_inline_asm inline_asm_labels '"1:\n"'
4097
4098 if enabled aarch64; then
4099     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4100     # internal assembler in clang 3.3 does not support this instruction
4101     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4102     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4103
4104     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4105
4106 elif enabled alpha; then
4107
4108     check_cflags -mieee
4109
4110 elif enabled arm; then
4111
4112     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4113     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4114     enabled thumb && check_cflags -mthumb || check_cflags -marm
4115
4116     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4117         enable vfp_args
4118     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4119         enable vfp_args
4120     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4121         case "${cross_prefix:-$cc}" in
4122             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4123             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4124 __asm__ (".eabi_attribute 28, 1");
4125 int main(void) { return 0; }
4126 EOF
4127         esac
4128         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4129     fi
4130
4131     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4132     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4133     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4134     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4135     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4136     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4137
4138     [ $target_os = linux ] || [ $target_os = android ] ||
4139         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4140             $ARCH_EXT_LIST_ARM
4141
4142     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4143
4144     check_as <<EOF && enable as_dn_directive
4145 ra .dn d0.i16
4146 .unreq ra
4147 EOF
4148
4149     # llvm's integrated assembler supports .object_arch from llvm 3.5
4150     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4151 .object_arch armv4
4152 EOF
4153
4154     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4155
4156 elif enabled mips; then
4157
4158     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4159
4160     # make sure that only an instruction set is enabled
4161     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4162
4163     if enabled mips64; then
4164         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4165             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4166                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4167     else
4168         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4169             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4170                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4171     fi
4172
4173 elif enabled parisc; then
4174
4175     if enabled gcc; then
4176         case $($cc -dumpversion) in
4177             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4178         esac
4179     fi
4180
4181 elif enabled ppc; then
4182
4183     enable local_aligned_8 local_aligned_16
4184
4185     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4186     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4187     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4188     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4189
4190     # AltiVec flags: The FSF version of GCC differs from the Apple version
4191     if enabled altivec; then
4192         check_cflags -maltivec -mabi=altivec &&
4193         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4194         check_cflags -faltivec
4195
4196         # check if our compiler supports Motorola AltiVec C API
4197         check_cc <<EOF || disable altivec
4198 $inc_altivec_h
4199 int main(void) {
4200     vector signed int v1 = (vector signed int) { 0 };
4201     vector signed int v2 = (vector signed int) { 1 };
4202     v1 = vec_add(v1, v2);
4203     return 0;
4204 }
4205 EOF
4206
4207         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4208     fi
4209
4210     if enabled vsx; then
4211         check_cflags -mvsx &&
4212         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4213     fi
4214
4215     if enabled power8; then
4216         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4217     fi
4218
4219 elif enabled x86; then
4220
4221     check_builtin rdtsc    intrin.h   "__rdtsc()"
4222     check_builtin mm_empty mmintrin.h "_mm_empty()"
4223
4224     enable local_aligned_8 local_aligned_16
4225
4226     # check whether EBP is available on x86
4227     # As 'i' is stored on the stack, this program will crash
4228     # if the base pointer is used to access it because the
4229     # base pointer is cleared in the inline assembly code.
4230     check_exec_crash <<EOF && enable ebp_available
4231 volatile int i=0;
4232 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4233 return i;
4234 EOF
4235
4236     # check whether EBX is available on x86
4237     check_inline_asm ebx_available '""::"b"(0)' &&
4238         check_inline_asm ebx_available '"":::"%ebx"'
4239
4240     # check whether xmm clobbers are supported
4241     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4242
4243     # check whether binutils is new enough to compile SSSE3/MMXEXT
4244     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4245     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4246
4247     if ! disabled_any asm mmx yasm; then
4248         if check_cmd $yasmexe --version; then
4249             enabled x86_64 && yasm_extra="-m amd64"
4250             yasm_debug="-g dwarf2"
4251         elif check_cmd nasm -v; then
4252             yasmexe=nasm
4253             yasm_debug="-g -F dwarf"
4254             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4255         fi
4256
4257         YASMFLAGS="-f $objformat $yasm_extra"
4258         enabled pic               && append YASMFLAGS "-DPIC"
4259         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4260         case "$objformat" in
4261             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4262         esac
4263
4264         check_yasm "movbe ecx, [5]" && enable yasm ||
4265             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4266         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4267         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4268         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4269         check_yasm "CPU amdnop" || disable cpunop
4270     fi
4271
4272     case "$cpu" in
4273         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4274             disable fast_clz
4275         ;;
4276     esac
4277
4278 fi
4279
4280 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4281
4282 check_ldflags -Wl,--as-needed
4283
4284 if check_func dlopen; then
4285     ldl=
4286 elif check_func dlopen -ldl; then
4287     ldl=-ldl
4288 fi
4289
4290 if ! disabled network; then
4291     check_func getaddrinfo $network_extralibs
4292     check_func inet_aton $network_extralibs
4293
4294     check_type netdb.h "struct addrinfo"
4295     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4296     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4297     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4298     check_type poll.h "struct pollfd"
4299     check_type netinet/sctp.h "struct sctp_event_subscribe"
4300     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4301     check_type netinet/in.h "struct sockaddr_in6"
4302     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4303     check_type "sys/types.h sys/socket.h" socklen_t
4304
4305     # Prefer arpa/inet.h over winsock2
4306     if check_header arpa/inet.h ; then
4307         check_func closesocket
4308     elif check_header winsock2.h ; then
4309         check_func_headers winsock2.h closesocket -lws2 &&
4310             network_extralibs="-lws2" ||
4311         { check_func_headers winsock2.h closesocket -lws2_32 &&
4312             network_extralibs="-lws2_32"; } || disable winsock2_h network
4313         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4314
4315         check_type ws2tcpip.h socklen_t
4316         check_type ws2tcpip.h "struct addrinfo"
4317         check_type ws2tcpip.h "struct group_source_req"
4318         check_type ws2tcpip.h "struct ip_mreq_source"
4319         check_type ws2tcpip.h "struct ipv6_mreq"
4320         check_type winsock2.h "struct pollfd"
4321         check_struct winsock2.h "struct sockaddr" sa_len
4322         check_type ws2tcpip.h "struct sockaddr_in6"
4323         check_type ws2tcpip.h "struct sockaddr_storage"
4324     else
4325         disable network
4326     fi
4327 fi
4328
4329 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4330 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4331 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4332 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4333
4334 case "$custom_allocator" in
4335     jemalloc)
4336         # jemalloc by default does not use a prefix
4337         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4338     ;;
4339     tcmalloc)
4340         require_pkg_config libtcmalloc gperftools/tcmalloc.h tc_malloc
4341         malloc_prefix=tc_
4342     ;;
4343 esac
4344
4345 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4346 check_func  ${malloc_prefix}memalign            && enable memalign
4347 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4348
4349 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4350     check_func_headers time.h clock_gettime || { check_func_headers time.h clock_gettime -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
4351
4352 check_func  fcntl
4353 check_func  fork
4354 check_func  gethrtime
4355 check_func  getopt
4356 check_func  getrusage
4357 check_func  gettimeofday
4358 check_func  gmtime_r
4359 check_func  isatty
4360 check_func  localtime_r
4361 check_func  mach_absolute_time
4362 check_func  mkstemp
4363 check_func  mmap
4364 check_func  mprotect
4365 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4366 check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt; }
4367 check_func  sched_getaffinity
4368 check_func  setrlimit
4369 check_func  strerror_r
4370 check_func  sysconf
4371 check_func  sysctl
4372 check_func  usleep
4373
4374 check_func_headers io.h setmode
4375 check_func_headers stdlib.h getenv
4376
4377 check_func_headers windows.h CoTaskMemFree -lole32
4378 check_func_headers windows.h GetProcessAffinityMask
4379 check_func_headers windows.h GetProcessTimes
4380 check_func_headers windows.h GetSystemTimeAsFileTime
4381 check_func_headers windows.h LoadLibrary
4382 check_func_headers windows.h MapViewOfFile
4383 check_func_headers windows.h SetConsoleTextAttribute
4384 check_func_headers windows.h Sleep
4385 check_func_headers windows.h VirtualAlloc
4386 check_struct windows.h "CONDITION_VARIABLE" Ptr
4387
4388 check_header direct.h
4389 check_header dlfcn.h
4390 check_header d3d11.h
4391 check_header dxva.h
4392 check_header dxva2api.h
4393 check_header io.h
4394 check_header mach/mach_time.h
4395 check_header malloc.h
4396 check_header poll.h
4397 check_header sys/mman.h
4398 check_header sys/param.h
4399 check_header sys/resource.h
4400 check_header sys/select.h
4401 check_header sys/time.h
4402 check_header sys/un.h
4403 check_header unistd.h
4404 check_header valgrind/valgrind.h
4405 check_header vdpau/vdpau.h
4406 check_header vdpau/vdpau_x11.h
4407 check_header VideoDecodeAcceleration/VDADecoder.h
4408 check_header windows.h