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     pr -n -t $1 >> $logfile
 347     log END $1
 348 }
 349
 350 echolog(){
 351     log "$@"
 352     echo "$@"
 353 }
 354
 355 warn(){
 356     log "WARNING: $*"
 357     WARNINGS="${WARNINGS}WARNING: $*\n"
 358 }
 359
 360 die(){
 361     echolog "$@"
 362     cat <<EOF
 363
 364 If you think configure made a mistake, make sure you are using the latest
 365 version from Git.  If the latest version fails, report the problem to the
 366 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
 367 EOF
 368     if disabled logging; then
 369         cat <<EOF
 370 Rerun configure with logging enabled (do not use --disable-logging), and
 371 include the log this produces with your report.
 372 EOF
 373     else
 374         cat <<EOF
 375 Include the log file "$logfile" produced by configure as this will help
 376 solving the problem.
 377 EOF
 378     fi
 379     exit 1
 380 }
 381
 382 # Avoid locale weirdness, besides we really just want to translate ASCII.
 383 toupper(){
 384     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
 385 }
 386
 387 tolower(){
 388     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
 389 }
 390
 391 c_escape(){
 392     echo "$*" | sed 's/["\\]/\\\0/g'
 393 }
 394
 395 sh_quote(){
 396     v=$(echo "$1" | sed "s/'/'\\\\''/g")
 397     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
 398     echo "$v"
 399 }
 400
 401 cleanws(){
 402     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
 403 }
 404
 405 filter(){
 406     pat=$1
 407     shift
 408     for v; do
 409         eval "case $v in $pat) echo $v ;; esac"
 410     done
 411 }
 412
 413 filter_out(){
 414     pat=$1
 415     shift
 416     for v; do
 417         eval "case $v in $pat) ;; *) echo $v ;; esac"
 418     done
 419 }
 420
 421 map(){
 422     m=$1
 423     shift
 424     for v; do eval $m; done
 425 }
 426
 427 add_suffix(){
 428     suffix=$1
 429     shift
 430     for v; do echo ${v}${suffix}; done
 431 }
 432
 433 set_all(){
 434     value=$1
 435     shift
 436     for var in $*; do
 437         eval $var=$value
 438     done
 439 }
 440
 441 set_weak(){
 442     value=$1
 443     shift
 444     for var; do
 445         eval : \${$var:=$value}
 446     done
 447 }
 448
 449 sanitize_var_name(){
 450     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
 451 }
 452
 453 set_safe(){
 454     var=$1
 455     shift
 456     eval $(sanitize_var_name "$var")='$*'
 457 }
 458
 459 get_safe(){
 460     eval echo \$$(sanitize_var_name "$1")
 461 }
 462
 463 pushvar(){
 464     for pvar in $*; do
 465         eval level=\${${pvar}_level:=0}
 466         eval ${pvar}_${level}="\$$pvar"
 467         eval ${pvar}_level=$(($level+1))
 468     done
 469 }
 470
 471 popvar(){
 472     for pvar in $*; do
 473         eval level=\${${pvar}_level:-0}
 474         test $level = 0 && continue
 475         eval level=$(($level-1))
 476         eval $pvar="\${${pvar}_${level}}"
 477         eval ${pvar}_level=$level
 478         eval unset ${pvar}_${level}
 479     done
 480 }
 481
 482 enable(){
 483     set_all yes $*
 484 }
 485
 486 disable(){
 487     set_all no $*
 488 }
 489
 490 enable_weak(){
 491     set_weak yes $*
 492 }
 493
 494 disable_weak(){
 495     set_weak no $*
 496 }
 497
 498 enable_safe(){
 499     for var; do
 500         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
 501     done
 502 }
 503
 504 disable_safe(){
 505     for var; do
 506         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
 507     done
 508 }
 509
 510 do_enable_deep(){
 511     for var; do
 512         enabled $var && continue
 513         eval sel="\$${var}_select"
 514         eval sgs="\$${var}_suggest"
 515         pushvar var sgs
 516         enable_deep $sel
 517         popvar sgs
 518         enable_deep_weak $sgs
 519         popvar var
 520     done
 521 }
 522
 523 enable_deep(){
 524     do_enable_deep $*
 525     enable $*
 526 }
 527
 528 enable_deep_weak(){
 529     for var; do
 530         disabled $var && continue
 531         pushvar var
 532         do_enable_deep $var
 533         popvar var
 534         enable_weak $var
 535     done
 536 }
 537
 538 enabled(){
 539     test "${1#!}" = "$1" && op== || op=!=
 540     eval test "x\$${1#!}" $op "xyes"
 541 }
 542
 543 disabled(){
 544     test "${1#!}" = "$1" && op== || op=!=
 545     eval test "x\$${1#!}" $op "xno"
 546 }
 547
 548 enabled_all(){
 549     for opt; do
 550         enabled $opt || return 1
 551     done
 552 }
 553
 554 disabled_all(){
 555     for opt; do
 556         disabled $opt || return 1
 557     done
 558 }
 559
 560 enabled_any(){
 561     for opt; do
 562         enabled $opt && return 0
 563     done
 564 }
 565
 566 disabled_any(){
 567     for opt; do
 568         disabled $opt && return 0
 569     done
 570     return 1
 571 }
 572
 573 set_default(){
 574     for opt; do
 575         eval : \${$opt:=\$${opt}_default}
 576     done
 577 }
 578
 579 is_in(){
 580     value=$1
 581     shift
 582     for var in $*; do
 583         [ $var = $value ] && return 0
 584     done
 585     return 1
 586 }
 587
 588 do_check_deps(){
 589     for cfg; do
 590         cfg="${cfg#!}"
 591         enabled ${cfg}_checking && die "Circular dependency for $cfg."
 592         disabled ${cfg}_checking && continue
 593         enable ${cfg}_checking
 594         append allopts $cfg
 595
 596         eval dep_all="\$${cfg}_deps"
 597         eval dep_any="\$${cfg}_deps_any"
 598         eval dep_sel="\$${cfg}_select"
 599         eval dep_sgs="\$${cfg}_suggest"
 600         eval dep_ifa="\$${cfg}_if"
 601         eval dep_ifn="\$${cfg}_if_any"
 602
 603         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
 604         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
 605         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
 606
 607         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
 608         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
 609         enabled_all  $dep_all || disable $cfg
 610         enabled_any  $dep_any || disable $cfg
 611         disabled_any $dep_sel && disable $cfg
 612
 613         if enabled $cfg; then
 614             enable_deep $dep_sel
 615             enable_deep_weak $dep_sgs
 616         fi
 617
 618         disable ${cfg}_checking
 619     done
 620 }
 621
 622 check_deps(){
 623     unset allopts
 624
 625     do_check_deps "$@"
 626
 627     for cfg in $allopts; do
 628         enabled $cfg || continue
 629         eval dep_extralibs="\$${cfg}_extralibs"
 630         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
 631     done
 632 }
 633
 634 print_config(){
 635     pfx=$1
 636     files=$2
 637     shift 2
 638     map 'eval echo "$v \${$v:-no}"' "$@" |
 639     awk "BEGIN { split(\"$files\", files) }
 640         {
 641             c = \"$pfx\" toupper(\$1);
 642             v = \$2;
 643             sub(/yes/, 1, v);
 644             sub(/no/,  0, v);
 645             for (f in files) {
 646                 file = files[f];
 647                 if (file ~ /\\.h\$/) {
 648                     printf(\"#define %s %d\\n\", c, v) >>file;
 649                 } else if (file ~ /\\.asm\$/) {
 650                     printf(\"%%define %s %d\\n\", c, v) >>file;
 651                 } else if (file ~ /\\.mak\$/) {
 652                     n = -v ? \"\" : \"!\";
 653                     printf(\"%s%s=yes\\n\", n, c) >>file;
 654                 }
 655             }
 656         }"
 657 }
 658
 659 print_enabled(){
 660     suf=$1
 661     shift
 662     for v; do
 663         enabled $v && printf "%s\n" ${v%$suf};
 664     done
 665 }
 666
 667 append(){
 668     var=$1
 669     shift
 670     eval "$var=\"\$$var $*\""
 671 }
 672
 673 prepend(){
 674     var=$1
 675     shift
 676     eval "$var=\"$* \$$var\""
 677 }
 678
 679 unique(){
 680     var=$1
 681     uniq_list=""
 682     for tok in $(eval echo \$$var); do
 683         uniq_list="$(filter_out $tok $uniq_list) $tok"
 684     done
 685     eval "$var=\"${uniq_list}\""
 686 }
 687
 688 add_cppflags(){
 689     append CPPFLAGS "$@"
 690 }
 691
 692 add_cflags(){
 693     append CFLAGS $($cflags_filter "$@")
 694 }
 695
 696 add_asflags(){
 697     append ASFLAGS $($asflags_filter "$@")
 698 }
 699
 700 add_objcflags(){
 701     append OBJCFLAGS $($objcflags_filter "$@")
 702 }
 703
 704 add_ldflags(){
 705     append LDFLAGS $($ldflags_filter "$@")
 706 }
 707
 708 add_ldexeflags(){
 709     append LDEXEFLAGS $($ldflags_filter "$@")
 710 }
 711
 712 add_stripflags(){
 713     append STRIPFLAGS "$@"
 714 }
 715
 716 add_extralibs(){
 717     prepend extralibs $($ldflags_filter "$@")
 718 }
 719
 720 add_host_cppflags(){
 721     append host_cppflags "$@"
 722 }
 723
 724 add_host_cflags(){
 725     append host_cflags $($host_cflags_filter "$@")
 726 }
 727
 728 add_host_ldflags(){
 729     append host_ldflags $($host_ldflags_filter "$@")
 730 }
 731
 732 add_compat(){
 733     append compat_objs $1
 734     shift
 735     map 'add_cppflags -D$v' "$@"
 736 }
 737
 738 check_cmd(){
 739     log "$@"
 740     "$@" >> $logfile 2>&1
 741 }
 742
 743 cc_o(){
 744     eval printf '%s\\n' $CC_O
 745 }
 746
 747 cc_e(){
 748     eval printf '%s\\n' $CC_E
 749 }
 750
 751 check_cc(){
 752     log check_cc "$@"
 753     cat > $TMPC
 754     log_file $TMPC
 755     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
 756 }
 757
 758 check_objcc(){
 759     log check_objcc "$@"
 760     cat > $TMPC
 761     log_file $TMPC
 762     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
 763 }
 764
 765 check_cpp(){
 766     log check_cpp "$@"
 767     cat > $TMPC
 768     log_file $TMPC
 769     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
 770 }
 771
 772 as_o(){
 773     eval printf '%s\\n' $AS_O
 774 }
 775
 776 check_as(){
 777     log check_as "$@"
 778     cat > $TMPS
 779     log_file $TMPS
 780     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
 781 }
 782
 783 check_inline_asm(){
 784     log check_inline_asm "$@"
 785     name="$1"
 786     code="$2"
 787     shift 2
 788     disable $name
 789     check_cc "$@" <<EOF && enable $name
 790 void foo(void){ __asm__ volatile($code); }
 791 EOF
 792 }
 793
 794 check_insn(){
 795     log check_insn "$@"
 796     check_inline_asm ${1}_inline "\"$2\""
 797     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
 798 }
 799
 800 check_yasm(){
 801     log check_yasm "$@"
 802     echo "$1" > $TMPS
 803     log_file $TMPS
 804     shift 1
 805     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
 806 }
 807
 808 ld_o(){
 809     eval printf '%s\\n' $LD_O
 810 }
 811
 812 check_ld(){
 813     log check_ld "$@"
 814     flags=$(filter_out '-l*' "$@")
 815     libs=$(filter '-l*' "$@")
 816     check_cc $($cflags_filter $flags) || return
 817     flags=$($ldflags_filter $flags)
 818     libs=$($ldflags_filter $libs)
 819     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
 820 }
 821
 822 print_include(){
 823     hdr=$1
 824     test "${hdr%.h}" = "${hdr}" &&
 825         echo "#include $hdr"    ||
 826         echo "#include <$hdr>"
 827 }
 828
 829 check_code(){
 830     log check_code "$@"
 831     check=$1
 832     headers=$2
 833     code=$3
 834     shift 3
 835     {
 836         for hdr in $headers; do
 837             print_include $hdr
 838         done
 839         echo "int main(void) { $code; return 0; }"
 840     } | check_$check "$@"
 841 }
 842
 843 check_cppflags(){
 844     log check_cppflags "$@"
 845     check_cc "$@" <<EOF && append CPPFLAGS "$@"
 846 int x;
 847 EOF
 848 }
 849
 850 test_cflags(){
 851     log test_cflags "$@"
 852     set -- $($cflags_filter "$@")
 853     check_cc "$@" <<EOF
 854 int x;
 855 EOF
 856 }
 857
 858 check_cflags(){
 859     log check_cflags "$@"
 860     test_cflags "$@" && add_cflags "$@"
 861 }
 862
 863 test_objcflags(){
 864     log test_cflags "$@"
 865     set -- $($cflags_filter "$@")
 866     check_objcc "$@" <<EOF
 867 int x;
 868 EOF
 869 }
 870
 871 check_objcflags(){
 872     log check_cflags "$@"
 873     test_objcflags "$@" && add_objcflags "$@"
 874 }
 875
 876 test_ldflags(){
 877     log test_ldflags "$@"
 878     check_ld "$@" <<EOF
 879 int main(void){ return 0; }
 880 EOF
 881 }
 882
 883 check_ldflags(){
 884     log check_ldflags "$@"
 885     test_ldflags "$@" && add_ldflags "$@"
 886 }
 887
 888 test_stripflags(){
 889     log test_stripflags "$@"
 890     # call check_cc to get a fresh TMPO
 891     check_cc <<EOF
 892 int main(void) { return 0; }
 893 EOF
 894     check_cmd $strip $STRIPFLAGS "$@" $TMPO
 895 }
 896
 897 check_stripflags(){
 898     log check_stripflags "$@"
 899     test_stripflags "$@" && add_stripflags "$@"
 900 }
 901
 902 check_header(){
 903     log check_header "$@"
 904     header=$1
 905     shift
 906     disable_safe $header
 907     check_cpp "$@" <<EOF && enable_safe $header
 908 #include <$header>
 909 int x;
 910 EOF
 911 }
 912
 913 check_func(){
 914     log check_func "$@"
 915     func=$1
 916     shift
 917     disable $func
 918     check_ld "$@" <<EOF && enable $func
 919 extern int $func();
 920 int main(void){ $func(); }
 921 EOF
 922 }
 923
 924 check_mathfunc(){
 925     log check_mathfunc "$@"
 926     func=$1
 927     narg=$2
 928     shift 2
 929     test $narg = 2 && args="f, g" || args="f"
 930     disable $func
 931     check_ld "$@" <<EOF && enable $func
 932 #include <math.h>
 933 float foo(float f, float g) { return $func($args); }
 934 int main(void){ return 0; }
 935 EOF
 936 }
 937
 938 check_func_headers(){
 939     log check_func_headers "$@"
 940     headers=$1
 941     funcs=$2
 942     shift 2
 943     {
 944         for hdr in $headers; do
 945             print_include $hdr
 946         done
 947         for func in $funcs; do
 948             echo "long check_$func(void) { return (long) $func; }"
 949         done
 950         echo "int main(void) { return 0; }"
 951     } | check_ld "$@" && enable $funcs && enable_safe $headers
 952 }
 953
 954 check_cpp_condition(){
 955     log check_cpp_condition "$@"
 956     header=$1
 957     condition=$2
 958     shift 2
 959     check_cpp "$@" <<EOF
 960 #include <$header>
 961 #if !($condition)
 962 #error "unsatisfied condition: $condition"
 963 #endif
 964 EOF
 965 }
 966
 967 check_lib(){
 968     log check_lib "$@"
 969     header="$1"
 970     func="$2"
 971     shift 2
 972     check_header $header && check_func $func "$@" && add_extralibs "$@"
 973 }
 974
 975 check_lib2(){
 976     log check_lib2 "$@"
 977     headers="$1"
 978     funcs="$2"
 979     shift 2
 980     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
 981 }
 982
 983 check_pkg_config(){
 984     log check_pkg_config "$@"
 985     pkg="$1"
 986     headers="$2"
 987     funcs="$3"
 988     shift 3
 989     check_cmd $pkg_config --exists --print-errors $pkg || return
 990     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
 991     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
 992     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
 993         set_safe "${pkg}_cflags" $pkg_cflags   &&
 994         set_safe "${pkg}_libs"   $pkg_libs
 995 }
 996
 997 check_exec(){
 998     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
 999 }
1000
1001 check_exec_crash(){
1002     code=$(cat)
1003
1004     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1005     # are safe but may not be available everywhere.  Thus we use
1006     # raise(SIGTERM) instead.  The check is run in a subshell so we
1007     # can redirect the "Terminated" message from the shell.  SIGBUS
1008     # is not defined by standard C so it is used conditionally.
1009
1010     (check_exec "$@") >> $logfile 2>&1 <<EOF
1011 #include <signal.h>
1012 static void sighandler(int sig){
1013     raise(SIGTERM);
1014 }
1015 int foo(void){
1016     $code
1017 }
1018 int (*func_ptr)(void) = foo;
1019 int main(void){
1020     signal(SIGILL, sighandler);
1021     signal(SIGFPE, sighandler);
1022     signal(SIGSEGV, sighandler);
1023 #ifdef SIGBUS
1024     signal(SIGBUS, sighandler);
1025 #endif
1026     return func_ptr();
1027 }
1028 EOF
1029 }
1030
1031 check_type(){
1032     log check_type "$@"
1033     headers=$1
1034     type=$2
1035     shift 2
1036     disable_safe "$type"
1037     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1038 }
1039
1040 check_struct(){
1041     log check_struct "$@"
1042     headers=$1
1043     struct=$2
1044     member=$3
1045     shift 3
1046     disable_safe "${struct}_${member}"
1047     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1048         enable_safe "${struct}_${member}"
1049 }
1050
1051 check_builtin(){
1052     log check_builtin "$@"
1053     name=$1
1054     headers=$2
1055     builtin=$3
1056     shift 3
1057     disable "$name"
1058     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1059 }
1060
1061 check_compile_assert(){
1062     log check_compile_assert "$@"
1063     name=$1
1064     headers=$2
1065     condition=$3
1066     shift 3
1067     disable "$name"
1068     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1069 }
1070
1071 require(){
1072     name="$1"
1073     header="$2"
1074     func="$3"
1075     shift 3
1076     check_lib $header $func "$@" || die "ERROR: $name not found"
1077 }
1078
1079 require2(){
1080     name="$1"
1081     headers="$2"
1082     func="$3"
1083     shift 3
1084     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1085 }
1086
1087 require_pkg_config(){
1088     pkg="$1"
1089     check_pkg_config "$@" || die "ERROR: $pkg not found"
1090     add_cflags    $(get_safe "${pkg}_cflags")
1091     add_extralibs $(get_safe "${pkg}_libs")
1092 }
1093
1094 hostcc_e(){
1095     eval printf '%s\\n' $HOSTCC_E
1096 }
1097
1098 hostcc_o(){
1099     eval printf '%s\\n' $HOSTCC_O
1100 }
1101
1102 check_host_cc(){
1103     log check_host_cc "$@"
1104     cat > $TMPC
1105     log_file $TMPC
1106     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1107 }
1108
1109 check_host_cpp(){
1110     log check_host_cpp "$@"
1111     cat > $TMPC
1112     log_file $TMPC
1113     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1114 }
1115
1116 check_host_cppflags(){
1117     log check_host_cppflags "$@"
1118     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1119 int x;
1120 EOF
1121 }
1122
1123 check_host_cflags(){
1124     log check_host_cflags "$@"
1125     set -- $($host_cflags_filter "$@")
1126     check_host_cc "$@" <<EOF && append host_cflags "$@"
1127 int x;
1128 EOF
1129 }
1130
1131 check_host_cpp_condition(){
1132     log check_host_cpp_condition "$@"
1133     header=$1
1134     condition=$2
1135     shift 2
1136     check_host_cpp "$@" <<EOF
1137 #include <$header>
1138 #if !($condition)
1139 #error "unsatisfied condition: $condition"
1140 #endif
1141 EOF
1142 }
1143
1144 apply(){
1145     file=$1
1146     shift
1147     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1148 }
1149
1150 cp_if_changed(){
1151     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1152     mkdir -p "$(dirname $2)"
1153     $cp_f "$1" "$2"
1154 }
1155
1156 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1157 # system-dependent things.
1158
1159 AVCODEC_COMPONENTS="
1160     bsfs
1161     decoders
1162     encoders
1163     hwaccels
1164     parsers
1165 "
1166
1167 AVDEVICE_COMPONENTS="
1168     indevs
1169     outdevs
1170 "
1171 AVFILTER_COMPONENTS="
1172     filters
1173 "
1174 AVFORMAT_COMPONENTS="
1175     demuxers
1176     muxers
1177     protocols
1178 "
1179
1180 AVRESAMPLE_COMPONENTS=""
1181 AVUTIL_COMPONENTS=""
1182
1183 COMPONENT_LIST="
1184     $AVCODEC_COMPONENTS
1185     $AVDEVICE_COMPONENTS
1186     $AVFILTER_COMPONENTS
1187     $AVFORMAT_COMPONENTS
1188     $AVRESAMPLE_COMPONENTS
1189     $AVUTIL_COMPONENTS
1190 "
1191
1192 EXAMPLE_LIST="
1193     avcodec_example
1194     filter_audio_example
1195     metadata_example
1196     output_example
1197     qsvdec_example
1198     transcode_aac_example
1199 "
1200
1201 EXTERNAL_LIBRARY_LIST="
1202     avisynth
1203     bzlib
1204     frei0r
1205     gnutls
1206     libbs2b
1207     libcdio
1208     libdc1394
1209     libdcadec
1210     libfaac
1211     libfdk_aac
1212     libfontconfig
1213     libfreetype
1214     libgsm
1215     libilbc
1216     libkvazaar
1217     libmfx
1218     libmp3lame
1219     libopencore_amrnb
1220     libopencore_amrwb
1221     libopencv
1222     libopenh264
1223     libopenjpeg
1224     libopus
1225     libpulse
1226     librtmp
1227     libschroedinger
1228     libsnappy
1229     libspeex
1230     libtheora
1231     libtwolame
1232     libvo_aacenc
1233     libvo_amrwbenc
1234     libvorbis
1235     libvpx
1236     libwavpack
1237     libwebp
1238     libx264
1239     libx265
1240     libxavs
1241     libxcb
1242     libxcb_shm
1243     libxcb_xfixes
1244     libxvid
1245     mmal
1246     nvenc
1247     openssl
1248     x11grab
1249     zlib
1250 "
1251
1252 FEATURE_LIST="
1253     gray
1254     hardcoded_tables
1255     runtime_cpudetect
1256     safe_bitstream_reader
1257     shared
1258     small
1259     sram
1260     static
1261     swscale_alpha
1262 "
1263
1264 HWACCEL_LIST="
1265     d3d11va
1266     dxva2
1267     vaapi
1268     vda
1269     vdpau
1270 "
1271
1272 LIBRARY_LIST="
1273     avcodec
1274     avdevice
1275     avfilter
1276     avformat
1277     avresample
1278     avutil
1279     swscale
1280 "
1281
1282 LICENSE_LIST="
1283     gpl
1284     nonfree
1285     version3
1286 "
1287
1288 PROGRAM_LIST="
1289     avconv
1290     avplay
1291     avprobe
1292 "
1293
1294 SUBSYSTEM_LIST="
1295     dct
1296     doc
1297     error_resilience
1298     faan
1299     fft
1300     lsp
1301     lzo
1302     mdct
1303     network
1304     rdft
1305 "
1306
1307 CONFIG_LIST="
1308     $COMPONENT_LIST
1309     $EXAMPLE_LIST
1310     $EXTERNAL_LIBRARY_LIST
1311     $FEATURE_LIST
1312     $HWACCEL_LIST
1313     $LICENSE_LIST
1314     $LIBRARY_LIST
1315     $PROGRAM_LIST
1316     $SUBSYSTEM_LIST
1317     memalign_hack
1318     neon_clobber_test
1319     pic
1320     pod2man
1321     texi2html
1322     thumb
1323     valgrind_backtrace
1324     xmm_clobber_test
1325 "
1326
1327 THREADS_LIST="
1328     pthreads
1329     w32threads
1330 "
1331
1332 ATOMICS_LIST="
1333     atomics_gcc
1334     atomics_suncc
1335     atomics_win32
1336 "
1337
1338 ARCH_LIST="
1339     aarch64
1340     alpha
1341     arm
1342     avr32
1343     avr32_ap
1344     avr32_uc
1345     bfin
1346     ia64
1347     m68k
1348     mips
1349     mips64
1350     parisc
1351     ppc
1352     ppc64
1353     s390
1354     sh4
1355     sparc
1356     sparc64
1357     tilegx
1358     tilepro
1359     tomi
1360     x86
1361     x86_32
1362     x86_64
1363 "
1364
1365 ARCH_EXT_LIST_ARM="
1366     armv5te
1367     armv6
1368     armv6t2
1369     armv8
1370     neon
1371     vfp
1372     vfpv3
1373 "
1374
1375 ARCH_EXT_LIST_X86_SIMD="
1376     amd3dnow
1377     amd3dnowext
1378     avx
1379     avx2
1380     fma3
1381     fma4
1382     mmx
1383     mmxext
1384     sse
1385     sse2
1386     sse3
1387     sse4
1388     sse42
1389     ssse3
1390     xop
1391 "
1392
1393 ARCH_EXT_LIST_PPC="
1394     altivec
1395     dcbzl
1396     ldbrx
1397     power8
1398     ppc4xx
1399     vsx
1400 "
1401
1402 ARCH_EXT_LIST_X86="
1403     $ARCH_EXT_LIST_X86_SIMD
1404     cpunop
1405     i686
1406 "
1407
1408 ARCH_EXT_LIST_MIPS="
1409     loongson
1410     mips32r1
1411     mips64r1
1412     mips32r2
1413     mips64r2
1414     mips32r6
1415     mips64r6
1416 "
1417
1418 ARCH_EXT_LIST="
1419     $ARCH_EXT_LIST_ARM
1420     $ARCH_EXT_LIST_MIPS
1421     $ARCH_EXT_LIST_PPC
1422     $ARCH_EXT_LIST_X86
1423     vis
1424 "
1425
1426 ARCH_FEATURES="
1427     aligned_stack
1428     fast_64bit
1429     fast_clz
1430     fast_cmov
1431     local_aligned_8
1432     local_aligned_16
1433     simd_align_16
1434 "
1435
1436 BUILTIN_LIST="
1437     atomic_cas_ptr
1438     machine_rw_barrier
1439     MemoryBarrier
1440     mm_empty
1441     rdtsc
1442     sync_val_compare_and_swap
1443 "
1444 HAVE_LIST_CMDLINE="
1445     inline_asm
1446     symver
1447     yasm
1448 "
1449
1450 HAVE_LIST_PUB="
1451     bigendian
1452     fast_unaligned
1453 "
1454
1455 HEADERS_LIST="
1456     alsa_asoundlib_h
1457     altivec_h
1458     arpa_inet_h
1459     cdio_paranoia_h
1460     cdio_paranoia_paranoia_h
1461     dev_bktr_ioctl_bt848_h
1462     dev_bktr_ioctl_meteor_h
1463     dev_ic_bt8xx_h
1464     dev_video_bktr_ioctl_bt848_h
1465     dev_video_meteor_ioctl_meteor_h
1466     direct_h
1467     dlfcn_h
1468     d3d11_h
1469     dxva_h
1470     gsm_h
1471     io_h
1472     mach_mach_time_h
1473     machine_ioctl_bt848_h
1474     machine_ioctl_meteor_h
1475     malloc_h
1476     poll_h
1477     sndio_h
1478     soundcard_h
1479     sys_mman_h
1480     sys_param_h
1481     sys_resource_h
1482     sys_select_h
1483     sys_soundcard_h
1484     sys_time_h
1485     sys_un_h
1486     sys_videoio_h
1487     unistd_h
1488     valgrind_valgrind_h
1489     windows_h
1490     winsock2_h
1491 "
1492
1493 INTRINSICS_LIST="
1494     intrinsics_neon
1495 "
1496
1497 MATH_FUNCS="
1498     atanf
1499     atan2f
1500     cbrtf
1501     cosf
1502     exp2
1503     exp2f
1504     expf
1505     isinf
1506     isnan
1507     ldexpf
1508     llrint
1509     llrintf
1510     log2
1511     log2f
1512     log10f
1513     lrint
1514     lrintf
1515     powf
1516     rint
1517     round
1518     roundf
1519     sinf
1520     trunc
1521     truncf
1522 "
1523
1524 SYSTEM_FUNCS="
1525     aligned_malloc
1526     clock_gettime
1527     closesocket
1528     CommandLineToArgvW
1529     CoTaskMemFree
1530     CryptGenRandom
1531     dlopen
1532     fcntl
1533     flt_lim
1534     fork
1535     getaddrinfo
1536     gethrtime
1537     getopt
1538     GetProcessAffinityMask
1539     GetProcessMemoryInfo
1540     GetProcessTimes
1541     getrusage
1542     GetSystemTimeAsFileTime
1543     gettimeofday
1544     gmtime_r
1545     inet_aton
1546     isatty
1547     jack_port_get_latency_range
1548     LoadLibrary
1549     localtime_r
1550     mach_absolute_time
1551     MapViewOfFile
1552     memalign
1553     mkstemp
1554     mmap
1555     mprotect
1556     nanosleep
1557     posix_memalign
1558     sched_getaffinity
1559     SetConsoleTextAttribute
1560     setmode
1561     setrlimit
1562     Sleep
1563     strerror_r
1564     sysconf
1565     sysctl
1566     usleep
1567     VirtualAlloc
1568 "
1569
1570 TOOLCHAIN_FEATURES="
1571     as_dn_directive
1572     as_func
1573     as_object_arch
1574     asm_mod_q
1575     attribute_may_alias
1576     attribute_packed
1577     ebp_available
1578     ebx_available
1579     gnu_as
1580     ibm_asm
1581     inline_asm_labels
1582     pragma_deprecated
1583     symver_asm_label
1584     symver_gnu_asm
1585     vfp_args
1586     xform_asm
1587     xmm_clobbers
1588 "
1589
1590 TYPES_LIST="
1591     CONDITION_VARIABLE_Ptr
1592     socklen_t
1593     struct_addrinfo
1594     struct_group_source_req
1595     struct_ip_mreq_source
1596     struct_ipv6_mreq
1597     struct_pollfd
1598     struct_rusage_ru_maxrss
1599     struct_sockaddr_in6
1600     struct_sockaddr_sa_len
1601     struct_sockaddr_storage
1602     struct_v4l2_frmivalenum_discrete
1603 "
1604
1605 HAVE_LIST="
1606     $ARCH_EXT_LIST
1607     $(add_suffix _external $ARCH_EXT_LIST)
1608     $(add_suffix _inline   $ARCH_EXT_LIST)
1609     $ARCH_FEATURES
1610     $ATOMICS_LIST
1611     $BUILTIN_LIST
1612     $HAVE_LIST_CMDLINE
1613     $HAVE_LIST_PUB
1614     $HEADERS_LIST
1615     $INTRINSICS_LIST
1616     $MATH_FUNCS
1617     $SYSTEM_FUNCS
1618     $THREADS_LIST
1619     $TOOLCHAIN_FEATURES
1620     $TYPES_LIST
1621     atomics_native
1622     dos_paths
1623     dxva2_lib
1624     libc_msvcrt
1625     libdc1394_1
1626     libdc1394_2
1627     sdl
1628     section_data_rel_ro
1629     threads
1630     vaapi_x11
1631     vdpau_x11
1632     xlib
1633 "
1634
1635 # options emitted with CONFIG_ prefix but not available on the command line
1636 CONFIG_EXTRA="
1637     aandcttables
1638     ac3dsp
1639     audio_frame_queue
1640     audiodsp
1641     blockdsp
1642     bswapdsp
1643     cabac
1644     dvprofile
1645     faandct
1646     faanidct
1647     fdctdsp
1648     flacdsp
1649     fmtconvert
1650     g722dsp
1651     gcrypt
1652     gmp
1653     golomb
1654     gplv3
1655     h263dsp
1656     h264chroma
1657     h264dsp
1658     h264pred
1659     h264qpel
1660     hpeldsp
1661     huffman
1662     huffyuvdsp
1663     huffyuvencdsp
1664     idctdsp
1665     iirfilter
1666     imdct15
1667     intrax8
1668     ividsp
1669     jpegtables
1670     libx262
1671     lgplv3
1672     lpc
1673     lzf
1674     me_cmp
1675     mpeg_er
1676     mpegaudio
1677     mpegaudiodsp
1678     mpegvideo
1679     mpegvideoenc
1680     mss34dsp
1681     pixblockdsp
1682     qpeldsp
1683     qsv
1684     qsvdec
1685     qsvenc
1686     rangecoder
1687     riffdec
1688     riffenc
1689     rtpdec
1690     rtpenc_chain
1691     rv34dsp
1692     sinewin
1693     snappy
1694     startcode
1695     texturedsp
1696     texturedspenc
1697     tpeldsp
1698     videodsp
1699     vp3dsp
1700     vp56dsp
1701     vp8dsp
1702     wma_freqs
1703     wmv2dsp
1704 "
1705
1706 CMDLINE_SELECT="
1707     $ARCH_EXT_LIST
1708     $CONFIG_LIST
1709     $HAVE_LIST_CMDLINE
1710     $THREADS_LIST
1711     asm
1712     cross_compile
1713     debug
1714     extra_warnings
1715     logging
1716     lto
1717     optimizations
1718     rpath
1719 "
1720
1721 PATHS_LIST="
1722     bindir
1723     datadir
1724     docdir
1725     incdir
1726     libdir
1727     mandir
1728     prefix
1729     shlibdir
1730 "
1731
1732 CMDLINE_SET="
1733     $PATHS_LIST
1734     ar
1735     arch
1736     as
1737     build_suffix
1738     cc
1739     objcc
1740     cpu
1741     cross_prefix
1742     custom_allocator
1743     dep_cc
1744     env
1745     extra_version
1746     host_cc
1747     host_cflags
1748     host_ld
1749     host_ldflags
1750     host_libs
1751     host_os
1752     ld
1753     logfile
1754     malloc_prefix
1755     nm
1756     optflags
1757     pkg_config
1758     pkg_config_flags
1759     random_seed
1760     samples
1761     sysinclude
1762     sysroot
1763     target_exec
1764     target_os
1765     target_path
1766     target_samples
1767     toolchain
1768 "
1769
1770 CMDLINE_APPEND="
1771     extra_cflags
1772     extra_objcflags
1773     host_cppflags
1774 "
1775
1776 # code dependency declarations
1777
1778 # architecture extensions
1779
1780 armv5te_deps="arm"
1781 armv6_deps="arm"
1782 armv6t2_deps="arm"
1783 armv8_deps="aarch64"
1784 neon_deps_any="aarch64 arm"
1785 intrinsics_neon_deps="neon"
1786 vfp_deps_any="aarch64 arm"
1787 vfpv3_deps="vfp"
1788
1789 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1790
1791 altivec_deps="ppc"
1792 ppc4xx_deps="ppc"
1793 vsx_deps="altivec"
1794 power8_deps="vsx"
1795
1796 cpunop_deps="i686"
1797 x86_64_select="i686"
1798 x86_64_suggest="fast_cmov"
1799
1800 amd3dnow_deps="mmx"
1801 amd3dnowext_deps="amd3dnow"
1802 i686_deps="x86"
1803 mmx_deps="x86"
1804 mmxext_deps="mmx"
1805 sse_deps="mmxext"
1806 sse2_deps="sse"
1807 sse3_deps="sse2"
1808 ssse3_deps="sse3"
1809 sse4_deps="ssse3"
1810 sse42_deps="sse4"
1811 avx_deps="sse42"
1812 xop_deps="avx"
1813 fma3_deps="avx"
1814 fma4_deps="avx"
1815 avx2_deps="avx"
1816
1817 mmx_external_deps="yasm"
1818 mmx_inline_deps="inline_asm"
1819 mmx_suggest="mmx_external mmx_inline"
1820
1821 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1822     eval dep=\$${ext}_deps
1823     eval ${ext}_external_deps='"${dep}_external"'
1824     eval ${ext}_inline_deps='"${dep}_inline"'
1825     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1826 done
1827
1828 aligned_stack_if_any="aarch64 ppc x86"
1829 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1830 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1831 fast_unaligned_if_any="aarch64 ppc x86"
1832 simd_align_16_if_any="altivec neon sse"
1833
1834 # system capabilities
1835 symver_if_any="symver_asm_label symver_gnu_asm"
1836 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
1837
1838 # threading support
1839 atomics_gcc_if="sync_val_compare_and_swap"
1840 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1841 atomics_win32_if="MemoryBarrier"
1842 atomics_native_if_any="$ATOMICS_LIST"
1843 w32threads_deps="atomics_native"
1844 threads_if_any="$THREADS_LIST"
1845
1846 # subsystems
1847 dct_select="rdft"
1848 error_resilience_select="me_cmp"
1849 faandct_deps="faan fdctdsp"
1850 faanidct_deps="faan idctdsp"
1851 intrax8_select="error_resilience"
1852 mdct_select="fft"
1853 rdft_select="fft"
1854 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1855 mpeg_er_select="error_resilience"
1856 mpegaudio_select="mpegaudiodsp"
1857 mpegaudiodsp_select="dct"
1858 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp videodsp"
1859 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1860 nvenc_deps_any="dlopen LoadLibrary"
1861 nvenc_extralibs='$ldl'
1862 qsvdec_select="qsv"
1863 qsvenc_select="qsv"
1864
1865 # decoders / encoders
1866 aac_decoder_select="imdct15 mdct sinewin"
1867 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1868 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1869 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1870 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1871 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1872 adpcm_g722_decoder_select="g722dsp"
1873 adpcm_g722_encoder_select="g722dsp"
1874 aic_decoder_select="golomb idctdsp"
1875 alac_encoder_select="lpc"
1876 als_decoder_select="bswapdsp"
1877 amrnb_decoder_select="lsp"
1878 amrwb_decoder_select="lsp"
1879 amv_decoder_select="sp5x_decoder"
1880 ape_decoder_select="bswapdsp"
1881 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1882 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1883 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1884 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1885 atrac1_decoder_select="mdct sinewin"
1886 atrac3_decoder_select="mdct"
1887 atrac3p_decoder_select="mdct sinewin"
1888 bink_decoder_select="blockdsp hpeldsp"
1889 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1890 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1891 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1892 cllc_decoder_select="bswapdsp"
1893 comfortnoise_encoder_select="lpc"
1894 cook_decoder_select="audiodsp mdct sinewin"
1895 cscd_decoder_select="lzo"
1896 cscd_decoder_suggest="zlib"
1897 dca_decoder_select="fmtconvert mdct"
1898 dds_decoder_select="texturedsp"
1899 dnxhd_decoder_select="blockdsp idctdsp"
1900 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1901 dvvideo_decoder_select="dvprofile idctdsp"
1902 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1903 dxa_decoder_deps="zlib"
1904 dxv_decoder_select="lzf texturedsp"
1905 eac3_decoder_select="ac3_decoder"
1906 eac3_encoder_select="ac3_encoder"
1907 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1908 eatgq_decoder_select="aandcttables idctdsp"
1909 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpeg1video_decoder"
1910 exr_decoder_deps="zlib"
1911 ffv1_decoder_select="golomb rangecoder"
1912 ffv1_encoder_select="rangecoder"
1913 ffvhuff_decoder_select="huffyuv_decoder"
1914 ffvhuff_encoder_select="huffyuv_encoder"
1915 fic_decoder_select="golomb"
1916 flac_decoder_select="flacdsp golomb"
1917 flac_encoder_select="bswapdsp flacdsp golomb lpc"
1918 flashsv_decoder_deps="zlib"
1919 flashsv_encoder_deps="zlib"
1920 flashsv2_decoder_deps="zlib"
1921 flv_decoder_select="h263_decoder"
1922 flv_encoder_select="h263_encoder"
1923 fourxm_decoder_select="blockdsp bswapdsp"
1924 fraps_decoder_select="bswapdsp huffman"
1925 g2m_decoder_deps="zlib"
1926 g2m_decoder_select="blockdsp idctdsp jpegtables"
1927 h261_decoder_select="mpeg_er mpegvideo"
1928 h261_encoder_select="aandcttables mpegvideoenc"
1929 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
1930 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1931 h263i_decoder_select="h263_decoder"
1932 h263p_encoder_select="h263_encoder"
1933 h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel startcode videodsp"
1934 h264_decoder_suggest="error_resilience"
1935 h264_nvenc_encoder_deps="nvenc"
1936 h264_qsv_decoder_deps="libmfx"
1937 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
1938 h264_qsv_encoder_deps="libmfx"
1939 h264_qsv_encoder_select="qsvenc"
1940 hap_decoder_select="snappy texturedsp"
1941 hap_encoder_deps="libsnappy"
1942 hap_encoder_select="texturedspenc"
1943 hevc_decoder_select="bswapdsp cabac golomb videodsp"
1944 hevc_nvenc_encoder_deps="nvenc"
1945 hevc_qsv_encoder_deps="libmfx"
1946 hevc_qsv_decoder_deps="libmfx"
1947 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser qsvdec hevc_qsv_hwaccel"
1948 hevc_qsv_encoder_select="qsvenc"
1949 huffyuv_decoder_select="bswapdsp huffyuvdsp"
1950 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
1951 iac_decoder_select="imc_decoder"
1952 imc_decoder_select="bswapdsp fft mdct sinewin"
1953 indeo3_decoder_select="hpeldsp"
1954 indeo4_decoder_select="ividsp"
1955 indeo5_decoder_select="ividsp"
1956 interplay_video_decoder_select="hpeldsp"
1957 jpegls_decoder_select="golomb mjpeg_decoder"
1958 jpegls_encoder_select="golomb"
1959 jv_decoder_select="blockdsp"
1960 lagarith_decoder_select="huffyuvdsp"
1961 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
1962 loco_decoder_select="golomb"
1963 mdec_decoder_select="blockdsp idctdsp mpegvideo"
1964 metasound_decoder_select="lsp mdct sinewin"
1965 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
1966 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
1967 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
1968 mjpegb_decoder_select="mjpeg_decoder"
1969 mlp_decoder_select="mlp_parser"
1970 motionpixels_decoder_select="bswapdsp"
1971 mp1_decoder_select="mpegaudio"
1972 mp1float_decoder_select="mpegaudio"
1973 mp2_decoder_select="mpegaudio"
1974 mp2float_decoder_select="mpegaudio"
1975 mp3_decoder_select="mpegaudio"
1976 mp3adu_decoder_select="mpegaudio"
1977 mp3adufloat_decoder_select="mpegaudio"
1978 mp3float_decoder_select="mpegaudio"
1979 mp3on4_decoder_select="mpegaudio"
1980 mp3on4float_decoder_select="mpegaudio"
1981 mpc7_decoder_select="bswapdsp mpegaudiodsp"
1982 mpc8_decoder_select="mpegaudiodsp"
1983 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
1984 mpeg_xvmc_decoder_select="mpeg2video_decoder"
1985 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
1986 mpeg1video_encoder_select="aandcttables mpegvideoenc"
1987 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
1988 mpeg2video_encoder_select="aandcttables mpegvideoenc"
1989 mpeg2_qsv_decoder_deps="libmfx"
1990 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
1991 mpeg2_qsv_encoder_deps="libmfx"
1992 mpeg2_qsv_encoder_select="qsvenc"
1993 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
1994 mpeg4_encoder_select="h263_encoder"
1995 msa1_decoder_select="mss34dsp"
1996 msmpeg4v1_decoder_select="h263_decoder"
1997 msmpeg4v2_decoder_select="h263_decoder"
1998 msmpeg4v2_encoder_select="h263_encoder"
1999 msmpeg4v3_decoder_select="h263_decoder"
2000 msmpeg4v3_encoder_select="h263_encoder"
2001 mss2_decoder_select="error_resilience mpeg_er qpeldsp vc1_decoder"
2002 mts2_decoder_select="mss34dsp"
2003 mxpeg_decoder_select="mjpeg_decoder"
2004 nellymoser_decoder_select="mdct sinewin"
2005 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2006 nuv_decoder_select="idctdsp lzo"
2007 on2avc_decoder_select="mdct"
2008 opus_decoder_deps="avresample"
2009 opus_decoder_select="imdct15"
2010 png_decoder_deps="zlib"
2011 png_encoder_deps="zlib"
2012 png_encoder_select="huffyuvencdsp"
2013 prores_decoder_select="idctdsp"
2014 prores_encoder_select="fdctdsp"
2015 qcelp_decoder_select="lsp"
2016 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2017 ra_144_encoder_select="audio_frame_queue lpc"
2018 ralf_decoder_select="golomb"
2019 rscc_decoder_deps="zlib"
2020 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2021 rv10_encoder_select="h263_encoder"
2022 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2023 rv20_encoder_select="h263_encoder"
2024 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2025 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2026 screenpresso_decoder_deps="zlib"
2027 shorten_decoder_select="golomb"
2028 sipr_decoder_select="lsp"
2029 sp5x_decoder_select="mjpeg_decoder"
2030 svq1_decoder_select="hpeldsp"
2031 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2032 svq3_decoder_select="h264_decoder hpeldsp tpeldsp"
2033 svq3_decoder_suggest="zlib"
2034 tak_decoder_select="audiodsp"
2035 tdsc_decoder_deps="zlib"
2036 tdsc_decoder_select="mjpeg_decoder"
2037 theora_decoder_select="vp3_decoder"
2038 thp_decoder_select="mjpeg_decoder"
2039 tiff_decoder_suggest="zlib"
2040 tiff_encoder_suggest="zlib"
2041 truehd_decoder_select="mlp_decoder"
2042 truemotion2_decoder_select="bswapdsp"
2043 truespeech_decoder_select="bswapdsp"
2044 tscc_decoder_deps="zlib"
2045 txd_decoder_select="texturedsp"
2046 twinvq_decoder_select="mdct lsp sinewin"
2047 utvideo_decoder_select="bswapdsp"
2048 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2049 vble_decoder_select="huffyuvdsp"
2050 vc1_decoder_select="blockdsp error_resilience h263_decoder h264chroma h264qpel intrax8 mpeg_er qpeldsp startcode"
2051 vc1image_decoder_select="vc1_decoder"
2052 vorbis_decoder_select="mdct"
2053 vorbis_encoder_select="mdct"
2054 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2055 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2056 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2057 vp6a_decoder_select="vp6_decoder"
2058 vp6f_decoder_select="vp6_decoder"
2059 vp7_decoder_select="h264pred videodsp vp8dsp"
2060 vp8_decoder_select="h264pred videodsp vp8dsp"
2061 vp9_decoder_select="videodsp"
2062 webp_decoder_select="vp8_decoder"
2063 wmapro_decoder_select="mdct sinewin wma_freqs"
2064 wmav1_decoder_select="mdct sinewin wma_freqs"
2065 wmav1_encoder_select="mdct sinewin wma_freqs"
2066 wmav2_decoder_select="mdct sinewin wma_freqs"
2067 wmav2_encoder_select="mdct sinewin wma_freqs"
2068 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2069 wmv1_decoder_select="h263_decoder"
2070 wmv1_encoder_select="h263_encoder"
2071 wmv2_decoder_select="blockdsp h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2072 wmv2_encoder_select="h263_encoder wmv2dsp"
2073 wmv3_decoder_select="vc1_decoder"
2074 wmv3image_decoder_select="wmv3_decoder"
2075 zerocodec_decoder_deps="zlib"
2076 zlib_decoder_deps="zlib"
2077 zlib_encoder_deps="zlib"
2078 zmbv_decoder_deps="zlib"
2079 zmbv_encoder_deps="zlib"
2080
2081 # hardware accelerators
2082 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2083 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2084 vaapi_deps="va_va_h"
2085 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2086 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2087 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2088
2089 h263_vaapi_hwaccel_deps="vaapi"
2090 h263_vaapi_hwaccel_select="h263_decoder"
2091 h264_d3d11va_hwaccel_deps="d3d11va"
2092 h264_d3d11va_hwaccel_select="h264_decoder"
2093 h264_dxva2_hwaccel_deps="dxva2"
2094 h264_dxva2_hwaccel_select="h264_decoder"
2095 h264_mmal_decoder_deps="mmal"
2096 h264_mmal_hwaccel_deps="mmal"
2097 h264_mmal_decoder_select="h264_decoder"
2098 h264_mmal_encoder_deps="mmal"
2099 h264_qsv_hwaccel_deps="libmfx"
2100 h264_vaapi_hwaccel_deps="vaapi"
2101 h264_vaapi_hwaccel_select="h264_decoder"
2102 h264_vda_hwaccel_deps="vda"
2103 h264_vda_hwaccel_select="h264_decoder"
2104 h264_vda_old_hwaccel_deps="vda"
2105 h264_vda_old_hwaccel_select="h264_decoder"
2106 h264_vdpau_hwaccel_deps="vdpau"
2107 h264_vdpau_hwaccel_select="h264_decoder"
2108 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2109 hevc_d3d11va_hwaccel_select="hevc_decoder"
2110 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2111 hevc_dxva2_hwaccel_select="hevc_decoder"
2112 hevc_qsv_hwaccel_deps="libmfx"
2113 mpeg1_vdpau_hwaccel_deps="vdpau"
2114 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2115 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2116 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2117 mpeg2_dxva2_hwaccel_deps="dxva2"
2118 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2119 mpeg2_qsv_hwaccel_deps="libmfx"
2120 mpeg2_vaapi_hwaccel_deps="vaapi"
2121 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2122 mpeg2_vdpau_hwaccel_deps="vdpau"
2123 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2124 mpeg4_vaapi_hwaccel_deps="vaapi"
2125 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2126 mpeg4_vdpau_hwaccel_deps="vdpau"
2127 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2128 vc1_d3d11va_hwaccel_deps="d3d11va"
2129 vc1_d3d11va_hwaccel_select="vc1_decoder"
2130 vc1_dxva2_hwaccel_deps="dxva2"
2131 vc1_dxva2_hwaccel_select="vc1_decoder"
2132 vc1_vaapi_hwaccel_deps="vaapi"
2133 vc1_vaapi_hwaccel_select="vc1_decoder"
2134 vc1_vdpau_hwaccel_deps="vdpau"
2135 vc1_vdpau_hwaccel_select="vc1_decoder"
2136 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2137 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2138 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2139 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2140
2141 # parsers
2142 h264_parser_select="h264_decoder"
2143 hevc_parser_select="golomb"
2144 mpegvideo_parser_select="mpegvideo"
2145 mpeg4video_parser_select="error_resilience h263dsp mpeg_er mpegvideo qpeldsp"
2146 vc1_parser_select="mpegvideo startcode vc1_decoder"
2147
2148 # bitstream_filters
2149 mjpeg2jpeg_bsf_select="jpegtables"
2150
2151 # external libraries
2152 libdcadec_decoder_deps="libdcadec"
2153 libfaac_encoder_deps="libfaac"
2154 libfaac_encoder_select="audio_frame_queue"
2155 libfdk_aac_decoder_deps="libfdk_aac"
2156 libfdk_aac_encoder_deps="libfdk_aac"
2157 libfdk_aac_encoder_select="audio_frame_queue"
2158 libgsm_decoder_deps="libgsm"
2159 libgsm_encoder_deps="libgsm"
2160 libgsm_ms_decoder_deps="libgsm"
2161 libgsm_ms_encoder_deps="libgsm"
2162 libilbc_decoder_deps="libilbc"
2163 libilbc_encoder_deps="libilbc"
2164 libkvazaar_encoder_deps="libkvazaar"
2165 libmp3lame_encoder_deps="libmp3lame"
2166 libmp3lame_encoder_select="audio_frame_queue"
2167 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2168 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2169 libopencore_amrnb_encoder_select="audio_frame_queue"
2170 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2171 libopenh264_encoder_deps="libopenh264"
2172 libopenjpeg_decoder_deps="libopenjpeg"
2173 libopenjpeg_encoder_deps="libopenjpeg"
2174 libopus_decoder_deps="libopus"
2175 libopus_encoder_deps="libopus"
2176 libopus_encoder_select="audio_frame_queue"
2177 libschroedinger_decoder_deps="libschroedinger"
2178 libschroedinger_encoder_deps="libschroedinger"
2179 libspeex_decoder_deps="libspeex"
2180 libspeex_encoder_deps="libspeex"
2181 libspeex_encoder_select="audio_frame_queue"
2182 libtheora_encoder_deps="libtheora"
2183 libtwolame_encoder_deps="libtwolame"
2184 libvo_aacenc_encoder_deps="libvo_aacenc"
2185 libvo_aacenc_encoder_select="audio_frame_queue"
2186 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2187 libvorbis_encoder_deps="libvorbis"
2188 libvorbis_encoder_select="audio_frame_queue"
2189 libvpx_vp8_decoder_deps="libvpx"
2190 libvpx_vp8_encoder_deps="libvpx"
2191 libvpx_vp9_decoder_deps="libvpx"
2192 libvpx_vp9_encoder_deps="libvpx"
2193 libwavpack_encoder_deps="libwavpack"
2194 libwebp_encoder_deps="libwebp"
2195 libx262_encoder_deps="libx262"
2196 libx264_encoder_deps="libx264"
2197 libx265_encoder_deps="libx265"
2198 libxavs_encoder_deps="libxavs"
2199 libxvid_encoder_deps="libxvid"
2200
2201 # demuxers / muxers
2202 ac3_demuxer_select="ac3_parser"
2203 asf_demuxer_select="riffdec"
2204 asf_muxer_select="riffenc"
2205 asf_stream_muxer_select="asf_muxer"
2206 avi_demuxer_select="riffdec"
2207 avi_muxer_select="riffenc"
2208 avisynth_demuxer_deps="avisynth"
2209 avisynth_demuxer_select="riffdec"
2210 caf_demuxer_select="riffdec"
2211 dash_muxer_select="mp4_muxer"
2212 dirac_demuxer_select="dirac_parser"
2213 dv_demuxer_select="dvprofile"
2214 dv_muxer_select="dvprofile"
2215 dxa_demuxer_select="riffdec"
2216 eac3_demuxer_select="ac3_parser"
2217 f4v_muxer_select="mov_muxer"
2218 flac_demuxer_select="flac_parser"
2219 hds_muxer_select="flv_muxer"
2220 hls_muxer_select="mpegts_muxer"
2221 ipod_muxer_select="mov_muxer"
2222 ismv_muxer_select="mov_muxer"
2223 matroska_audio_muxer_select="matroska_muxer"
2224 matroska_demuxer_select="riffdec"
2225 matroska_demuxer_suggest="bzlib lzo zlib"
2226 matroska_muxer_select="riffenc"
2227 mmf_muxer_select="riffenc"
2228 mov_demuxer_select="riffdec"
2229 mov_demuxer_suggest="zlib"
2230 mov_muxer_select="riffenc rtpenc_chain"
2231 mp3_demuxer_select="mpegaudio_parser"
2232 mp4_muxer_select="mov_muxer"
2233 mpegts_muxer_select="adts_muxer latm_muxer"
2234 mpegtsraw_demuxer_select="mpegts_demuxer"
2235 mxf_d10_muxer_select="mxf_muxer"
2236 nut_muxer_select="riffenc"
2237 nuv_demuxer_select="riffdec"
2238 oga_muxer_select="ogg_muxer"
2239 ogg_demuxer_select="golomb"
2240 opus_muxer_select="ogg_muxer"
2241 psp_muxer_select="mov_muxer"
2242 rtp_demuxer_select="sdp_demuxer"
2243 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol"
2244 rtsp_demuxer_select="http_protocol rtpdec"
2245 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2246 sap_demuxer_select="sdp_demuxer"
2247 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2248 sdp_demuxer_select="rtpdec"
2249 smoothstreaming_muxer_select="ismv_muxer"
2250 spdif_muxer_select="aac_parser"
2251 spx_muxer_select="ogg_muxer"
2252 tak_demuxer_select="tak_parser"
2253 tg2_muxer_select="mov_muxer"
2254 tgp_muxer_select="mov_muxer"
2255 w64_demuxer_select="wav_demuxer"
2256 wav_demuxer_select="riffdec"
2257 wav_muxer_select="riffenc"
2258 webm_muxer_select="riffenc"
2259 webm_muxer_suggest="libopus_encoder libvorbis_encoder libvpx_vp8_encoder libvpx_vp9_encoder"
2260 wtv_demuxer_select="riffdec"
2261 xmv_demuxer_select="riffdec"
2262 xwma_demuxer_select="riffdec"
2263
2264 # indevs / outdevs
2265 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2266 alsa_outdev_deps="alsa_asoundlib_h"
2267 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2268 dv1394_indev_deps="dv1394"
2269 dv1394_indev_select="dv_demuxer"
2270 fbdev_indev_deps="linux_fb_h"
2271 jack_indev_deps="jack_jack_h pthreads"
2272 libcdio_indev_deps="libcdio"
2273 libdc1394_indev_deps="libdc1394"
2274 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2275 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2276 pulse_indev_deps="libpulse"
2277 sndio_indev_deps="sndio_h"
2278 sndio_outdev_deps="sndio_h"
2279 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2280 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2281 vfwcap_indev_extralibs="-lavicap32"
2282 x11grab_indev_deps="x11grab"
2283 x11grab_xcb_indev_deps="libxcb"
2284
2285 # protocols
2286 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2287 ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
2288 ffrtmpcrypt_protocol_select="tcp_protocol"
2289 ffrtmphttp_protocol_deps="!librtmp_protocol"
2290 ffrtmphttp_protocol_select="http_protocol"
2291 gopher_protocol_select="network"
2292 http_protocol_select="tcp_protocol"
2293 httpproxy_protocol_select="tcp_protocol"
2294 https_protocol_select="tls_protocol"
2295 icecast_protocol_select="http_protocol"
2296 librtmp_protocol_deps="librtmp"
2297 librtmpe_protocol_deps="librtmp"
2298 librtmps_protocol_deps="librtmp"
2299 librtmpt_protocol_deps="librtmp"
2300 librtmpte_protocol_deps="librtmp"
2301 mmsh_protocol_select="http_protocol"
2302 mmst_protocol_select="network"
2303 rtmp_protocol_deps="!librtmp_protocol"
2304 rtmp_protocol_select="tcp_protocol"
2305 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2306 rtmps_protocol_deps="!librtmp_protocol"
2307 rtmps_protocol_select="tls_protocol"
2308 rtmpt_protocol_select="ffrtmphttp_protocol"
2309 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2310 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2311 rtp_protocol_select="udp_protocol"
2312 sctp_protocol_deps="struct_sctp_event_subscribe"
2313 sctp_protocol_select="network"
2314 srtp_protocol_select="rtp_protocol"
2315 tcp_protocol_select="network"
2316 tls_gnutls_protocol_deps="gnutls"
2317 tls_gnutls_protocol_select="tcp_protocol"
2318 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
2319 tls_openssl_protocol_select="tcp_protocol"
2320 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2321 udp_protocol_select="network"
2322 unix_protocol_deps="sys_un_h"
2323 unix_protocol_select="network"
2324
2325 # filters
2326 blackframe_filter_deps="gpl"
2327 boxblur_filter_deps="gpl"
2328 bs2b_filter_deps="libbs2b"
2329 cropdetect_filter_deps="gpl"
2330 delogo_filter_deps="gpl"
2331 drawtext_filter_deps="libfreetype"
2332 frei0r_filter_deps="frei0r dlopen"
2333 frei0r_filter_extralibs='$ldl'
2334 frei0r_src_filter_deps="frei0r dlopen"
2335 frei0r_src_filter_extralibs='$ldl'
2336 hqdn3d_filter_deps="gpl"
2337 interlace_filter_deps="gpl"
2338 ocv_filter_deps="libopencv"
2339 resample_filter_deps="avresample"
2340 scale_filter_deps="swscale"
2341
2342 # examples
2343 avcodec_example_deps="avcodec avutil"
2344 filter_audio_example_deps="avfilter avutil"
2345 metadata_example_deps="avformat avutil"
2346 output_example_deps="avcodec avformat avutil swscale"
2347 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder vaapi_x11"
2348 transcode_aac_example_deps="avcodec avformat avresample"
2349
2350 # libraries, in linking order
2351 avcodec_deps="avutil"
2352 avdevice_deps="avformat avcodec avutil"
2353 avfilter_deps="avutil"
2354 avformat_deps="avcodec avutil"
2355 avresample_deps="avutil"
2356 swscale_deps="avutil"
2357
2358 # programs
2359 avconv_deps="avcodec avfilter avformat avresample swscale"
2360 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2361                fps_filter null_filter resample_filter scale_filter
2362                setpts_filter trim_filter"
2363 avplay_deps="avcodec avformat avresample swscale sdl"
2364 avplay_libs='$sdl_libs'
2365 avplay_select="rdft transpose_filter hflip_filter vflip_filter"
2366 avprobe_deps="avcodec avformat"
2367
2368 # documentation
2369 pod2man_deps="doc"
2370 texi2html_deps="doc"
2371
2372 # default parameters
2373
2374 logfile="config.log"
2375
2376 # installation paths
2377 prefix_default="/usr/local"
2378 bindir_default='${prefix}/bin'
2379 datadir_default='${prefix}/share/avconv'
2380 docdir_default='${prefix}/share/doc/libav'
2381 incdir_default='${prefix}/include'
2382 libdir_default='${prefix}/lib'
2383 mandir_default='${prefix}/share/man'
2384 shlibdir_default="$libdir_default"
2385
2386 # toolchain
2387 ar_default="ar"
2388 cc_default="gcc"
2389 host_cc_default="gcc"
2390 cp_f="cp -f"
2391 ln_s="ln -s -f"
2392 nm_default="nm -g"
2393 objformat="elf"
2394 pkg_config_default=pkg-config
2395 ranlib="ranlib"
2396 strip="strip"
2397 yasmexe="yasm"
2398
2399 # machine
2400 arch_default=$(uname -m)
2401 cpu="generic"
2402 intrinsics="none"
2403
2404 # OS
2405 target_os_default=$(tolower $(uname -s))
2406 host_os=$target_os_default
2407
2408 # configurable options
2409 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2410
2411 enable asm
2412 enable debug
2413 enable doc
2414 enable faan faandct faanidct
2415 enable optimizations
2416 enable safe_bitstream_reader
2417 enable static
2418 enable swscale_alpha
2419 enable valgrind_backtrace
2420
2421 # By default, enable only those hwaccels that have no external dependencies.
2422 enable d3d11va dxva2 vda vdpau
2423
2424 # build settings
2425 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2426 LIBPREF="lib"
2427 LIBSUF=".a"
2428 FULLNAME='$(NAME)$(BUILDSUF)'
2429 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2430 SLIBPREF="lib"
2431 SLIBSUF=".so"
2432 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2433 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2434 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2435 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2436 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2437 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2438
2439 asflags_filter=echo
2440 cflags_filter=echo
2441 ldflags_filter=echo
2442
2443 AS_C='-c'
2444 AS_O='-o $@'
2445 CC_C='-c'
2446 CC_E='-E -o $@'
2447 CC_O='-o $@'
2448 OBJCC_C='-c'
2449 OBJCC_E='-E -o $@'
2450 OBJCC_O='-o $@'
2451 LD_O='-o $@'
2452 LD_LIB='-l%'
2453 LD_PATH='-L'
2454 HOSTCC_C='-c'
2455 HOSTCC_E='-E -o $@'
2456 HOSTCC_O='-o $@'
2457 HOSTLD_O='-o $@'
2458
2459 host_libs='-lm'
2460 host_cflags_filter=echo
2461 host_ldflags_filter=echo
2462
2463 target_path='$(CURDIR)'
2464
2465 # since the object filename is not given with the -MM flag, the compiler
2466 # is only able to print the basename, and we must add the path ourselves
2467 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2468 DEPFLAGS='-MM'
2469
2470 # find source path
2471 if test -f configure; then
2472     source_path=.
2473 else
2474     source_path=$(cd $(dirname "$0"); pwd)
2475     echo "$source_path" | grep -q '[[:blank:]]' &&
2476         die "Out of tree builds are impossible with whitespace in source path."
2477     test -e "$source_path/config.h" &&
2478         die "Out of tree builds are impossible with config.h in source dir."
2479 fi
2480
2481 for v in "$@"; do
2482     r=${v#*=}
2483     l=${v%"$r"}
2484     r=$(sh_quote "$r")
2485     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2486 done
2487
2488 find_things(){
2489     thing=$1
2490     pattern=$2
2491     file=$source_path/$3
2492     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2493 }
2494
2495 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2496 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2497 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2498 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2499 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2500 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2501 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2502 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2503 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2504 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2505 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2506
2507 ALL_COMPONENTS="
2508     $BSF_LIST
2509     $DECODER_LIST
2510     $DEMUXER_LIST
2511     $ENCODER_LIST
2512     $FILTER_LIST
2513     $HWACCEL_LIST
2514     $INDEV_LIST
2515     $MUXER_LIST
2516     $OUTDEV_LIST
2517     $PARSER_LIST
2518     $PROTOCOL_LIST
2519 "
2520
2521 for n in $COMPONENT_LIST; do
2522     v=$(toupper ${n%s})_LIST
2523     eval enable \$$v
2524     eval ${n}_if_any="\$$v"
2525 done
2526
2527 enable $ARCH_EXT_LIST
2528
2529 die_unknown(){
2530     echo "Unknown option \"$1\"."
2531     echo "See $0 --help for available options."
2532     exit 1
2533 }
2534
2535 print_3_columns() {
2536     cat | tr ' ' '\n' | sort | pr -r -3 -t
2537 }
2538
2539 show_list() {
2540     suffix=_$1
2541     shift
2542     echo $* | sed s/$suffix//g | print_3_columns
2543     exit 0
2544 }
2545
2546 rand_list(){
2547     IFS=', '
2548     set -- $*
2549     unset IFS
2550     for thing; do
2551         comp=${thing%:*}
2552         prob=${thing#$comp}
2553         prob=${prob#:}
2554         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2555         echo "prob ${prob:-0.5}"
2556         printf '%s\n' $comp
2557     done
2558 }
2559
2560 do_random(){
2561     action=$1
2562     shift
2563     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2564     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2565 }
2566
2567 for opt do
2568     optval="${opt#*=}"
2569     case "$opt" in
2570         --extra-ldflags=*)
2571             add_ldflags $optval
2572         ;;
2573         --extra-ldexeflags=*)
2574             add_ldexeflags $optval
2575         ;;
2576         --extra-libs=*)
2577             add_extralibs $optval
2578         ;;
2579         --disable-devices)
2580             disable $INDEV_LIST $OUTDEV_LIST
2581         ;;
2582         --enable-debug=*)
2583             debuglevel="$optval"
2584         ;;
2585         --disable-programs)
2586             disable $PROGRAM_LIST
2587         ;;
2588         --disable-everything)
2589             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2590         ;;
2591         --disable-all)
2592             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2593             disable $LIBRARY_LIST $PROGRAM_LIST doc
2594         ;;
2595         --enable-random|--disable-random)
2596             action=${opt%%-random}
2597             do_random ${action#--} $COMPONENT_LIST
2598         ;;
2599         --enable-random=*|--disable-random=*)
2600             action=${opt%%-random=*}
2601             do_random ${action#--} $optval
2602         ;;
2603         --enable-*=*|--disable-*=*)
2604             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2605             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2606             eval list=\$$(toupper $thing)_LIST
2607             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2608             $action $(filter "$name" $list)
2609         ;;
2610         --enable-avserver|--disable-avserver*)
2611             warn "avserver has been removed, the ${opt} option is only"\
2612                  "provided for compatibility and will be removed in the future"
2613         ;;
2614         --enable-?*|--disable-?*)
2615             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2616             if is_in $option $COMPONENT_LIST; then
2617                 test $action = disable && action=unset
2618                 eval $action \$$(toupper ${option%s})_LIST
2619             elif is_in $option $CMDLINE_SELECT; then
2620                 $action $option
2621             else
2622                 die_unknown $opt
2623             fi
2624         ;;
2625         --list-*)
2626             NAME="${opt#--list-}"
2627             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2628             NAME=${NAME%s}
2629             eval show_list $NAME \$$(toupper $NAME)_LIST
2630         ;;
2631         --help|-h) show_help
2632         ;;
2633         *)
2634             optname="${opt%%=*}"
2635             optname="${optname#--}"
2636             optname=$(echo "$optname" | sed 's/-/_/g')
2637             if is_in $optname $CMDLINE_SET; then
2638                 eval $optname='$optval'
2639             elif is_in $optname $CMDLINE_APPEND; then
2640                 append $optname "$optval"
2641             else
2642                 die_unknown $opt
2643             fi
2644         ;;
2645     esac
2646 done
2647
2648 for e in $env; do
2649     eval "export $e"
2650 done
2651
2652 disabled logging && logfile=/dev/null
2653
2654 # Disable all the library-specific components if the library itself
2655 # is disabled, see AVCODEC_LIST and following _LIST variables.
2656
2657 disable_components(){
2658     disabled ${1} && disable $(
2659         eval components="\$$(toupper ${1})_COMPONENTS"
2660         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2661     )
2662 }
2663
2664 map 'disable_components $v' $LIBRARY_LIST
2665
2666 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2667 set >> $logfile
2668
2669 case "$toolchain" in
2670     clang-asan)
2671         cc_default="clang"
2672         add_cflags  -fsanitize=address
2673         add_ldflags -fsanitize=address
2674     ;;
2675     clang-tsan)
2676         cc_default="clang"
2677         add_cflags  -fsanitize=thread -pie
2678         add_ldflags -fsanitize=thread -pie
2679     ;;
2680     clang-usan)
2681         cc_default="clang"
2682         add_cflags  -fsanitize=undefined -O1
2683         add_ldflags -fsanitize=undefined
2684     ;;
2685     gcc-asan)
2686         cc_default="gcc"
2687         add_cflags  -fsanitize=address
2688         add_ldflags -fsanitize=address
2689     ;;
2690     gcc-tsan)
2691         cc_default="gcc"
2692         add_cflags  -fsanitize=thread -pie -fPIC
2693         add_ldflags -fsanitize=thread -pie -fPIC
2694     ;;
2695     gcc-usan)
2696         cc_default="gcc"
2697         add_cflags  -fsanitize=undefined
2698         add_ldflags -fsanitize=undefined
2699     ;;
2700     valgrind-massif)
2701         target_exec_default="valgrind"
2702         target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2703     ;;
2704     valgrind-memcheck)
2705         target_exec_default="valgrind"
2706         target_exec_args="--track-origins=yes --leak-check=full"
2707     ;;
2708     msvc)
2709         # Check whether the current MSVC version needs the C99 converter.
2710         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2711         # support enough of C99 to build libav. Default to the new
2712         # behaviour if the regexp was unable to match anything, since this
2713         # successfully parses the version number of existing supported
2714         # versions that require the converter (MSVC 2010 and 2012).
2715         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2716         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2717             cc_default="cl"
2718         else
2719             cc_default="c99wrap cl"
2720         fi
2721         ld_default="$source_path/compat/windows/mslink"
2722         nm_default="dumpbin -symbols"
2723         ar_default="lib"
2724         case "$arch" in
2725         arm*)
2726             as_default="armasm"
2727             ;;
2728         esac
2729         target_os_default="win32"
2730         # Use a relative path for TMPDIR. This makes sure all the
2731         # ffconf temp files are written with a relative path, avoiding
2732         # issues with msys/win32 path conversion for MSVC parameters
2733         # such as -Fo<file> or -out:<file>.
2734         TMPDIR=.
2735     ;;
2736     icl)
2737         cc_default="icl"
2738         ld_default="xilink"
2739         nm_default="dumpbin -symbols"
2740         ar_default="xilib"
2741         target_os_default="win32"
2742         TMPDIR=.
2743     ;;
2744     gcov)
2745         add_cflags  -fprofile-arcs -ftest-coverage
2746         add_ldflags -fprofile-arcs -ftest-coverage
2747     ;;
2748     hardened)
2749         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2750         add_cflags   -fno-strict-overflow -fstack-protector-all
2751         add_ldflags  -Wl,-z,relro -Wl,-z,now
2752     ;;
2753     ?*)
2754         die "Unknown toolchain $toolchain"
2755     ;;
2756 esac
2757
2758 test -n "$cross_prefix" && enable cross_compile
2759
2760 if enabled cross_compile; then
2761     test -n "$arch" && test -n "$target_os" ||
2762         die "Must specify target arch and OS when cross-compiling"
2763 fi
2764
2765 ar_default="${cross_prefix}${ar_default}"
2766 cc_default="${cross_prefix}${cc_default}"
2767 occ_default="${cross_prefix}${occ_default}"
2768 nm_default="${cross_prefix}${nm_default}"
2769 pkg_config_default="${cross_prefix}${pkg_config_default}"
2770 ranlib="${cross_prefix}${ranlib}"
2771 strip="${cross_prefix}${strip}"
2772
2773 sysinclude_default="${sysroot}/usr/include"
2774
2775 set_default arch cc pkg_config sysinclude target_exec target_os
2776 enabled cross_compile || host_cc_default=$cc
2777 set_default host_cc
2778
2779 if ! $pkg_config --version >/dev/null 2>&1; then
2780     warn "$pkg_config not found, library detection may fail."
2781     pkg_config=false
2782 fi
2783
2784 exesuf() {
2785     case $1 in
2786         mingw32*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2787     esac
2788 }
2789
2790 EXESUF=$(exesuf $target_os)
2791 HOSTEXESUF=$(exesuf $host_os)
2792
2793 # set temporary file name
2794 : ${TMPDIR:=$TEMPDIR}
2795 : ${TMPDIR:=$TMP}
2796 : ${TMPDIR:=/tmp}
2797
2798 if ! check_cmd mktemp -u XXXXXX; then
2799     # simple replacement for missing mktemp
2800     # NOT SAFE FOR GENERAL USE
2801     mktemp(){
2802         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2803     }
2804 fi
2805
2806 tmpfile(){
2807     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2808         (set -C; exec > $tmp) 2>/dev/null ||
2809         die "Unable to create temporary file in $TMPDIR."
2810     append TMPFILES $tmp
2811     eval $1=$tmp
2812 }
2813
2814 trap 'rm -f -- $TMPFILES' EXIT
2815
2816 tmpfile TMPASM .asm
2817 tmpfile TMPC   .c
2818 tmpfile TMPE   $EXESUF
2819 tmpfile TMPH   .h
2820 tmpfile TMPO   .o
2821 tmpfile TMPS   .S
2822 tmpfile TMPSH  .sh
2823 tmpfile TMPV   .ver
2824
2825 unset -f mktemp
2826
2827 chmod +x $TMPE
2828
2829 # make sure we can execute files in $TMPDIR
2830 cat > $TMPSH 2>> $logfile <<EOF
2831 #! /bin/sh
2832 EOF
2833 chmod +x $TMPSH >> $logfile 2>&1
2834 if ! $TMPSH >> $logfile 2>&1; then
2835     cat <<EOF
2836 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2837 variable to another directory and make sure that it is not mounted noexec.
2838 EOF
2839     die "Sanity test failed."
2840 fi
2841
2842 armasm_flags(){
2843     for flag; do
2844         case $flag in
2845             # Filter out MSVC cl.exe options from cflags that shouldn't
2846             # be passed to gas-preprocessor
2847             -M[TD]*)                                            ;;
2848             *)                  echo $flag                      ;;
2849         esac
2850    done
2851 }
2852
2853 ccc_flags(){
2854     for flag; do
2855         case $flag in
2856             -std=c99)           echo -c99                       ;;
2857             -mcpu=*)            echo -arch ${flag#*=}           ;;
2858             -mieee)             echo -ieee                      ;;
2859             -O*|-fast)          echo $flag                      ;;
2860             -fno-math-errno)    echo -assume nomath_errno       ;;
2861             -g)                 echo -g3                        ;;
2862             -Wall)              echo -msg_enable level2         ;;
2863             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2864             -Wl,*)              echo $flag                      ;;
2865             -f*|-W*)                                            ;;
2866             *)                  echo $flag                      ;;
2867         esac
2868    done
2869 }
2870
2871 cparser_flags(){
2872     for flag; do
2873         case $flag in
2874             -Wno-switch)             echo -Wno-switch-enum ;;
2875             -Wno-format-zero-length) ;;
2876             -Wdisabled-optimization) ;;
2877             -Wno-pointer-sign)       echo -Wno-other ;;
2878             *)                       echo $flag ;;
2879         esac
2880     done
2881 }
2882
2883 msvc_common_flags(){
2884     for flag; do
2885         case $flag in
2886             # In addition to specifying certain flags under the compiler
2887             # specific filters, they must be specified here as well or else the
2888             # generic catch all at the bottom will print the original flag.
2889             -Wall)                ;;
2890             -std=c99)             ;;
2891             # Common flags
2892             -fomit-frame-pointer) ;;
2893             -g)                   echo -Z7 ;;
2894             -fno-math-errno)      ;;
2895             -fno-common)          ;;
2896             -fno-signed-zeros)    ;;
2897             -fPIC)                ;;
2898             -mthumb)              ;;
2899             -march=*)             ;;
2900             -lz)                  echo zlib.lib ;;
2901             -lavifil32)           echo vfw32.lib ;;
2902             -lavicap32)           echo vfw32.lib user32.lib ;;
2903             -l*)                  echo ${flag#-l}.lib ;;
2904             -L*)                  echo -libpath:${flag#-L} ;;
2905             *)                    echo $flag ;;
2906         esac
2907     done
2908 }
2909
2910 msvc_flags(){
2911     msvc_common_flags "$@"
2912     for flag; do
2913         case $flag in
2914             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
2915                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
2916                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
2917                                        -wd4273 -wd4554 -wd4701 ;;
2918         esac
2919     done
2920 }
2921
2922 icl_flags(){
2923     msvc_common_flags "$@"
2924     for flag; do
2925         case $flag in
2926             # Despite what Intel's documentation says -Wall, which is supported
2927             # on Windows, does enable remarks so disable them here.
2928             -Wall)                echo $flag -Qdiag-disable:remark ;;
2929             -std=c99)             echo -Qstd=c99 ;;
2930         esac
2931     done
2932 }
2933
2934 pgi_flags(){
2935     for flag; do
2936         case $flag in
2937             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
2938             -fomit-frame-pointer) echo -Mnoframe ;;
2939             -g)                   echo -gopt ;;
2940             *)                    echo $flag ;;
2941         esac
2942     done
2943 }
2944
2945 suncc_flags(){
2946     for flag; do
2947         case $flag in
2948             -march=*|-mcpu=*)
2949                 case "${flag#*=}" in
2950                     native)                   echo -xtarget=native       ;;
2951                     v9|niagara)               echo -xarch=sparc          ;;
2952                     ultrasparc)               echo -xarch=sparcvis       ;;
2953                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
2954                     i586|pentium)             echo -xchip=pentium        ;;
2955                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
2956                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
2957                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
2958                     pentium4*)          echo -xtarget=pentium4           ;;
2959                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
2960                     *-sse3)             echo -xarch=sse3                 ;;
2961                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
2962                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
2963                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
2964                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
2965                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
2966                     k8|opteron|athlon64|athlon-fx)
2967                                                echo -xarch=sse2a         ;;
2968                     athlon*)                   echo -xarch=pentium_proa  ;;
2969                 esac
2970                 ;;
2971             -std=c99)             echo -xc99              ;;
2972             -fomit-frame-pointer) echo -xregs=frameptr    ;;
2973             -fPIC)                echo -KPIC -xcode=pic32 ;;
2974             -W*,*)                echo $flag              ;;
2975             -f*-*|-W*|-mimpure-text)                      ;;
2976             -shared)              echo -G                 ;;
2977             *)                    echo $flag              ;;
2978         esac
2979     done
2980 }
2981
2982 tms470_flags(){
2983     for flag; do
2984         case $flag in
2985             -march=*|-mcpu=*)
2986                 case "${flag#*=}" in
2987                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
2988                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
2989                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
2990                     armv6*|arm11*)          echo -mv=6   ;;
2991                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
2992                                             echo -mv=5e  ;;
2993                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
2994                 esac
2995                 ;;
2996             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
2997             -mfpu=vfp)      echo --float_support=vfpv2        ;;
2998             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
2999             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3000             -msoft-float)   echo --float_support=vfplib       ;;
3001             -O[0-3]|-mf=*)  echo $flag                        ;;
3002             -g)             echo -g -mn                       ;;
3003             -pds=*)         echo $flag                        ;;
3004             -D*|-I*)        echo $flag                        ;;
3005             --gcc|--abi=*)  echo $flag                        ;;
3006             -me)            echo $flag                        ;;
3007         esac
3008     done
3009 }
3010
3011 probe_cc(){
3012     pfx=$1
3013     _cc=$2
3014
3015     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3016     unset _ld_o _ldflags _ld_lib _ld_path
3017     unset _depflags _DEPCMD _DEPFLAGS
3018     _flags_filter=echo
3019
3020     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3021         _type=llvm_gcc
3022         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3023         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3024         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3025         _cflags_speed='-O3'
3026         _cflags_size='-Os'
3027     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3028         _type=gcc
3029         gcc_version=$($_cc --version | head -n1)
3030         gcc_basever=$($_cc -dumpversion)
3031         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3032         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3033         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3034         if ! $_cc -dumpversion | grep -q '^2\.'; then
3035             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3036         fi
3037         _cflags_speed='-O3'
3038         _cflags_size='-Os'
3039     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3040         _type=icc
3041         _ident=$($_cc --version | head -n1)
3042         _depflags='-MMD'
3043         _cflags_speed='-O3'
3044         _cflags_size='-Os'
3045         _cflags_noopt='-O1'
3046     elif $_cc -v 2>&1 | grep -q xlc; then
3047         _type=xlc
3048         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3049         _cflags_speed='-O5'
3050         _cflags_size='-O5 -qcompact'
3051     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3052         _type=ccc
3053         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3054         _DEPFLAGS='-M'
3055         _cflags_speed='-fast'
3056         _cflags_size='-O1'
3057         _flags_filter=ccc_flags
3058     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3059         test -d "$sysroot" || die "No valid sysroot specified."
3060         _type=armcc
3061         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3062         armcc_conf="$PWD/armcc.conf"
3063         $_cc --arm_linux_configure                 \
3064              --arm_linux_config_file="$armcc_conf" \
3065              --configure_sysroot="$sysroot"        \
3066              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3067              die "Error creating armcc configuration file."
3068         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3069         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3070         as_default="${cross_prefix}gcc"
3071         _depflags='-MMD'
3072         _cflags_speed='-O3'
3073         _cflags_size='-Os'
3074     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3075         _type=tms470
3076         _ident=$($_cc -version | head -n1 | tr -s ' ')
3077         _flags='--gcc --abi=eabi -me'
3078         _cc_e='-ppl -fe=$@'
3079         _cc_o='-fe=$@'
3080         _depflags='-ppa -ppd=$(@:.o=.d)'
3081         _cflags_speed='-O3 -mf=5'
3082         _cflags_size='-O3 -mf=2'
3083         _flags_filter=tms470_flags
3084     elif $_cc -v 2>&1 | grep -q clang; then
3085         _type=clang
3086         _ident=$($_cc --version 2>/dev/null | head -n1)
3087         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3088         _cflags_speed='-O3'
3089         _cflags_size='-Os'
3090     elif $_cc -V 2>&1 | grep -q Sun; then
3091         _type=suncc
3092         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3093         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3094         _DEPFLAGS='-xM1 -xc99'
3095         _ldflags='-std=c99'
3096         _cflags_speed='-O5'
3097         _cflags_size='-O5 -xspace'
3098         _flags_filter=suncc_flags
3099     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3100         _type=pathscale
3101         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3102         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3103         _cflags_speed='-O2'
3104         _cflags_size='-Os'
3105         _flags_filter='filter_out -Wdisabled-optimization'
3106     elif $_cc -v 2>&1 | grep -q Open64; then
3107         _type=open64
3108         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3109         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3110         _cflags_speed='-O2'
3111         _cflags_size='-Os'
3112         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3113     elif $_cc -V 2>&1 | grep -q Portland; then
3114         _type=pgi
3115         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3116         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3117         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3118         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3119         _cflags_noopt="-O1"
3120         _flags_filter=pgi_flags
3121     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3122         _type=armasm
3123         _ident=$($_cc | head -n1)
3124         # 4509: "This form of conditional instruction is deprecated"
3125         _flags="-nologo -ignore 4509"
3126         _flags_filter=armasm_flags
3127     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3128         _type=msvc
3129         _ident=$($_cc 2>&1 | head -n1)
3130         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3131         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3132         _cflags_speed="-O2"
3133         _cflags_size="-O1"
3134         if $_cc -nologo- 2>&1 | grep -q Linker; then
3135             _ld_o='-out:$@'
3136         else
3137             _ld_o='-Fe$@'
3138         fi
3139         _cc_o='-Fo$@'
3140         _cc_e='-P -Fi$@'
3141         _flags_filter=msvc_flags
3142         _ld_lib='lib%.a'
3143         _ld_path='-libpath:'
3144         _flags='-nologo'
3145         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS'
3146     elif $_cc 2>&1 | grep -q Intel; then
3147         _type=icl
3148         _ident=$($_cc 2>&1 | head -n1)
3149         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3150         # Not only is O3 broken on 13.x+ but it is slower on all previous
3151         # versions (tested) as well.
3152         _cflags_speed="-O2"
3153         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3154         if $_cc 2>&1 | grep -q Linker; then
3155             _ld_o='-out:$@'
3156         else
3157             _ld_o='-Fe$@'
3158         fi
3159         _cc_o='-Fo$@'
3160         _cc_e='-P'
3161         _flags_filter=icl_flags
3162         _ld_lib='lib%.a'
3163         _ld_path='-libpath:'
3164         # -Qdiag-error to make icl error when seeing certain unknown arguments
3165         _flags='-nologo -Qdiag-error:4044,10157'
3166         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3167         # with MSVC which enables it by default.
3168         _cflags='-D_USE_MATH_DEFINES -Qms0 -Qvec- -Qsimd- -GS'
3169     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3170         _type=cparser
3171         _ident=$($_cc --version | head -n1)
3172         _depflags='-MMD'
3173         _cflags_speed='-O4'
3174         _cflags_size='-O2'
3175         _flags_filter=cparser_flags
3176     fi
3177
3178     eval ${pfx}_type=\$_type
3179     eval ${pfx}_ident=\$_ident
3180 }
3181
3182 set_ccvars(){
3183     eval ${1}_C=\${_cc_c-\${${1}_C}}
3184     eval ${1}_E=\${_cc_e-\${${1}_E}}
3185     eval ${1}_O=\${_cc_o-\${${1}_O}}
3186
3187     if [ -n "$_depflags" ]; then
3188         eval ${1}_DEPFLAGS=\$_depflags
3189     else
3190         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3191         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3192         eval DEP${1}FLAGS=\$_flags
3193     fi
3194 }
3195
3196 probe_cc cc "$cc"
3197 cflags_filter=$_flags_filter
3198 cflags_speed=$_cflags_speed
3199 cflags_size=$_cflags_size
3200 cflags_noopt=$_cflags_noopt
3201 add_cflags $_flags $_cflags
3202 cc_ldflags=$_ldflags
3203 set_ccvars CC
3204
3205 probe_cc hostcc "$host_cc"
3206 host_cflags_filter=$_flags_filter
3207 add_host_cflags  $_flags $_cflags
3208 set_ccvars HOSTCC
3209
3210 test -n "$cc_type" && enable $cc_type ||
3211     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3212
3213 : ${as_default:=$cc}
3214 : ${objcc_default:=$cc}
3215 : ${dep_cc_default:=$cc}
3216 : ${ld_default:=$cc}
3217 : ${host_ld_default:=$host_cc}
3218 set_default ar as objcc dep_cc ld host_ld
3219
3220 probe_cc as "$as"
3221 asflags_filter=$_flags_filter
3222 add_asflags $_flags $_cflags
3223 set_ccvars AS
3224
3225 probe_cc objcc "$objcc"
3226 objcflags_filter=$_flags_filter
3227 add_objcflags $_flags $_cflags
3228 set_ccvars OBJC
3229
3230 probe_cc ld "$ld"
3231 ldflags_filter=$_flags_filter
3232 add_ldflags $_flags $_ldflags
3233 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3234 LD_O=${_ld_o-$LD_O}
3235 LD_LIB=${_ld_lib-$LD_LIB}
3236 LD_PATH=${_ld_path-$LD_PATH}
3237
3238 probe_cc hostld "$host_ld"
3239 host_ldflags_filter=$_flags_filter
3240 add_host_ldflags $_flags $_ldflags
3241 HOSTLD_O=${_ld_o-$HOSTLD_O}
3242
3243 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3244     probe_cc depcc "$dep_cc"
3245     CCDEP=${_DEPCMD:-$DEPCMD}
3246     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3247     DEPCCFLAGS=$_flags
3248 fi
3249
3250 if $ar 2>&1 | grep -q Microsoft; then
3251     arflags="-nologo"
3252     ar_o='-out:$@'
3253 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3254     arflags="rq"
3255     ar_o='$@'
3256 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3257     arflags='-Xany -r -c'
3258     ar_o='$@'
3259 else
3260     arflags="rc"
3261     ar_o='$@'
3262 fi
3263
3264 add_cflags $extra_cflags
3265 add_objcflags $extra_objcflags
3266 add_asflags $extra_cflags
3267
3268 if test -n "$sysroot"; then
3269     case "$cc_type" in
3270         gcc|llvm_gcc|clang)
3271             add_cppflags --sysroot="$sysroot"
3272             add_ldflags --sysroot="$sysroot"
3273         ;;
3274         tms470)
3275             add_cppflags -I"$sysinclude"
3276             add_ldflags  --sysroot="$sysroot"
3277         ;;
3278     esac
3279 fi
3280
3281 if test "$cpu" = host; then
3282     enabled cross_compile &&
3283         die "--cpu=host makes no sense when cross-compiling."
3284
3285     case "$cc_type" in
3286         gcc|llvm_gcc)
3287             check_native(){
3288                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3289                 sed -n "/cc1.*$1=/{
3290                             s/.*$1=\\([^ ]*\\).*/\\1/
3291                             p
3292                             q
3293                         }" $TMPE
3294             }
3295             cpu=$(check_native -march || check_native -mcpu)
3296         ;;
3297     esac
3298
3299     test "${cpu:-host}" = host &&
3300         die "--cpu=host not supported with compiler $cc"
3301 fi
3302
3303 # Deal with common $arch aliases
3304 case "$arch" in
3305     aarch64|arm64)
3306         arch="aarch64"
3307     ;;
3308     arm*)
3309         arch="arm"
3310     ;;
3311     mips*|IP*)
3312         arch="mips"
3313     ;;
3314     parisc*|hppa*)
3315         arch="parisc"
3316     ;;
3317     "Power Macintosh"|ppc*|powerpc*)
3318         arch="ppc"
3319     ;;
3320     s390|s390x)
3321         arch="s390"
3322     ;;
3323     sh4|sh)
3324         arch="sh4"
3325     ;;
3326     sun4u|sparc*)
3327         arch="sparc"
3328     ;;
3329     tilegx|tile-gx)
3330         arch="tilegx"
3331     ;;
3332     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3333         arch="x86"
3334     ;;
3335 esac
3336
3337 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3338 enable $arch
3339
3340 # Add processor-specific flags
3341 if enabled aarch64; then
3342
3343     case $cpu in
3344         armv*)
3345             cpuflags="-march=$cpu"
3346         ;;
3347         *)
3348             cpuflags="-mcpu=$cpu"
3349         ;;
3350     esac
3351
3352 elif enabled alpha; then
3353
3354     cpuflags="-mcpu=$cpu"
3355
3356 elif enabled arm; then
3357
3358     check_arm_arch() {
3359         check_cpp_condition stddef.h \
3360             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3361             $cpuflags
3362     }
3363
3364     probe_arm_arch() {
3365         if   check_arm_arch 4;        then echo armv4;
3366         elif check_arm_arch 4T;       then echo armv4t;
3367         elif check_arm_arch 5;        then echo armv5;
3368         elif check_arm_arch 5E;       then echo armv5e;
3369         elif check_arm_arch 5T;       then echo armv5t;
3370         elif check_arm_arch 5TE;      then echo armv5te;
3371         elif check_arm_arch 5TEJ;     then echo armv5te;
3372         elif check_arm_arch 6;        then echo armv6;
3373         elif check_arm_arch 6J;       then echo armv6j;
3374         elif check_arm_arch 6K;       then echo armv6k;
3375         elif check_arm_arch 6Z;       then echo armv6z;
3376         elif check_arm_arch 6ZK;      then echo armv6zk;
3377         elif check_arm_arch 6T2;      then echo armv6t2;
3378         elif check_arm_arch 7;        then echo armv7;
3379         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3380         elif check_arm_arch 7S;       then echo armv7-a;
3381         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3382         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3383         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3384         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3385         fi
3386     }
3387
3388     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3389
3390     case $cpu in
3391         armv*)
3392             cpuflags="-march=$cpu"
3393             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3394         ;;
3395         *)
3396             cpuflags="-mcpu=$cpu"
3397             case $cpu in
3398                 cortex-a*)                               subarch=armv7a  ;;
3399                 cortex-r*)                               subarch=armv7r  ;;
3400                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3401                 arm11*)                                  subarch=armv6   ;;
3402                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3403                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3404                 *)                             subarch=$(probe_arm_arch) ;;
3405             esac
3406         ;;
3407     esac
3408
3409     case "$subarch" in
3410         armv5t*)    enable fast_clz                ;;
3411         armv[6-8]*) enable fast_clz fast_unaligned ;;
3412     esac
3413
3414 elif enabled avr32; then
3415
3416     case $cpu in
3417         ap7[02]0[0-2])
3418             subarch="avr32_ap"
3419             cpuflags="-mpart=$cpu"
3420         ;;
3421         ap)
3422             subarch="avr32_ap"
3423             cpuflags="-march=$cpu"
3424         ;;
3425         uc3[ab]*)
3426             subarch="avr32_uc"
3427             cpuflags="-mcpu=$cpu"
3428         ;;
3429         uc)
3430             subarch="avr32_uc"
3431             cpuflags="-march=$cpu"
3432         ;;
3433     esac
3434
3435 elif enabled bfin; then
3436
3437     cpuflags="-mcpu=$cpu"
3438
3439 elif enabled mips; then
3440
3441     cpuflags="-march=$cpu"
3442
3443 elif enabled ppc; then
3444
3445     disable ldbrx
3446
3447     case $(tolower $cpu) in
3448         601|ppc601|powerpc601)
3449             cpuflags="-mcpu=601"
3450             disable altivec
3451         ;;
3452         603*|ppc603*|powerpc603*)
3453             cpuflags="-mcpu=603"
3454             disable altivec
3455         ;;
3456         604*|ppc604*|powerpc604*)
3457             cpuflags="-mcpu=604"
3458             disable altivec
3459         ;;
3460         g3|75*|ppc75*|powerpc75*)
3461             cpuflags="-mcpu=750"
3462             disable altivec
3463         ;;
3464         g4|745*|ppc745*|powerpc745*)
3465             cpuflags="-mcpu=7450"
3466             disable vsx
3467         ;;
3468         74*|ppc74*|powerpc74*)
3469             cpuflags="-mcpu=7400"
3470             disable vsx
3471         ;;
3472         g5|970|ppc970|powerpc970)
3473             cpuflags="-mcpu=970"
3474             disable vsx
3475         ;;
3476         power[3-6]*)
3477             cpuflags="-mcpu=$cpu"
3478             disable vsx
3479         ;;
3480         power[7-8]*)
3481             cpuflags="-mcpu=$cpu"
3482             enable ldbrx
3483         ;;
3484         cell)
3485             cpuflags="-mcpu=cell"
3486             enable ldbrx
3487             disable vsx
3488         ;;
3489         e500mc)
3490             cpuflags="-mcpu=e500mc"
3491             disable altivec
3492         ;;
3493         e500v2)
3494             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3495             disable altivec
3496             disable dcbzl
3497         ;;
3498         e500)
3499             cpuflags="-mcpu=8540 -mhard-float"
3500             disable altivec
3501             disable dcbzl
3502         ;;
3503     esac
3504
3505 elif enabled sparc; then
3506
3507     case $cpu in
3508         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3509             cpuflags="-mcpu=$cpu"
3510         ;;
3511         ultrasparc*|niagara[234])
3512             cpuflags="-mcpu=$cpu"
3513         ;;
3514     esac
3515
3516 elif enabled x86; then
3517
3518     case $cpu in
3519         i[345]86|pentium)
3520             cpuflags="-march=$cpu"
3521             disable i686
3522             disable mmx
3523         ;;
3524         # targets that do NOT support nopl and conditional mov (cmov)
3525         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3526             cpuflags="-march=$cpu"
3527             disable i686
3528         ;;
3529         # targets that do support nopl and conditional mov (cmov)
3530         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3531             cpuflags="-march=$cpu"
3532             enable i686
3533             enable fast_cmov
3534         ;;
3535         # targets that do support conditional mov but on which it's slow
3536         pentium4|pentium4m|prescott|nocona)
3537             cpuflags="-march=$cpu"
3538             enable i686
3539             disable fast_cmov
3540         ;;
3541     esac
3542
3543 fi
3544
3545 if [ "$cpu" != generic ]; then
3546     add_cflags  $cpuflags
3547     add_asflags $cpuflags
3548     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3549 fi
3550
3551 # compiler sanity check
3552 check_exec <<EOF
3553 int main(void){ return 0; }
3554 EOF
3555 if test "$?" != 0; then
3556     echo "$cc is unable to create an executable file."
3557     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3558         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3559         echo "Only do this if you know what cross compiling means."
3560     fi
3561     die "C compiler test failed."
3562 fi
3563
3564 add_cppflags -D_ISOC99_SOURCE
3565 check_cflags -std=c99
3566 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3567 #include <stdlib.h>
3568 EOF
3569 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3570 #include <stdlib.h>
3571 EOF
3572
3573 add_host_cppflags -D_ISOC99_SOURCE
3574 check_host_cflags -std=c99
3575 check_host_cflags -Wall
3576 check_host_cflags -O3
3577
3578 check_64bit(){
3579     arch32=$1
3580     arch64=$2
3581     expr=$3
3582     check_code cc "" "int test[2*($expr) - 1]" &&
3583         subarch=$arch64 || subarch=$arch32
3584 }
3585
3586 case "$arch" in
3587     aarch64|alpha|ia64)
3588         spic=$shared
3589     ;;
3590     mips)
3591         check_64bit mips mips64 '_MIPS_SIM > 1'
3592         spic=$shared
3593     ;;
3594     parisc)
3595         check_64bit parisc parisc64 'sizeof(void *) > 4'
3596         spic=$shared
3597     ;;
3598     ppc)
3599         check_64bit ppc ppc64 'sizeof(void *) > 4'
3600         spic=$shared
3601     ;;
3602     s390)
3603         check_64bit s390 s390x 'sizeof(void *) > 4'
3604         spic=$shared
3605     ;;
3606     sparc)
3607         check_64bit sparc sparc64 'sizeof(void *) > 4'
3608         spic=$shared
3609     ;;
3610     x86)
3611         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3612         if test "$subarch" = "x86_64"; then
3613             spic=$shared
3614         fi
3615     ;;
3616 esac
3617
3618 enable $subarch
3619 enabled spic && enable_weak pic
3620
3621 # OS specific
3622 case $target_os in
3623     aix)
3624         SHFLAGS=-shared
3625         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3626         enabled shared && add_ldflags -Wl,-brtl
3627         ;;
3628     android)
3629         disable symver
3630         enable section_data_rel_ro
3631         SLIB_INSTALL_NAME='$(SLIBNAME)'
3632         SLIB_INSTALL_LINKS=
3633         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3634         ;;
3635     haiku)
3636         prefix_default="/boot/common"
3637         network_extralibs="-lnetwork"
3638         host_libs=
3639         ;;
3640     sunos)
3641         SHFLAGS='-shared -Wl,-h,$$(@F)'
3642         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3643         network_extralibs="-lsocket -lnsl"
3644         # When using suncc to build, the Solaris linker will mark
3645         # an executable with each instruction set encountered by
3646         # the Solaris assembler.  As our libraries contain their own
3647         # guards for processor-specific code, instead suppress
3648         # generation of the HWCAPS ELF section on Solaris x86 only.
3649         enabled_all suncc x86 &&
3650             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3651             add_ldflags -Wl,-M,mapfile
3652         nm_default='nm -P -g'
3653         SLIB_CREATE_DEF_CMD='$(Q)perl $(SRC_PATH)/compat/solaris/make_sunver.pl $$(filter %.ver,$$^) $(OBJS) | grep -v @ > $(SUBDIR)lib$(NAME).ver-sol2'
3654         ;;
3655     netbsd)
3656         disable symver
3657         oss_indev_extralibs="-lossaudio"
3658         oss_outdev_extralibs="-lossaudio"
3659         ;;
3660     openbsd|bitrig)
3661         disable symver
3662         SHFLAGS='-shared'
3663         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3664         SLIB_INSTALL_LINKS=
3665         oss_indev_extralibs="-lossaudio"
3666         oss_outdev_extralibs="-lossaudio"
3667         ;;
3668     dragonfly)
3669         disable symver
3670         ;;
3671     freebsd)
3672         ;;
3673     bsd/os)
3674         add_extralibs -lpoll -lgnugetopt
3675         ;;
3676     darwin)
3677         enabled ppc && add_asflags -force_cpusubtype_ALL
3678         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3679         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3680         add_ldflags -Wl,-dynamic,-search_paths_first
3681         SLIBSUF=".dylib"
3682         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3683         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3684         objformat="macho"
3685         enabled x86_64 && objformat="macho64"
3686         enabled_any pic shared ||
3687             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3688         ;;
3689     msys*)
3690         die "Native MSYS builds are discouraged, please use the MINGW environment.";
3691         ;;
3692     mingw32*)
3693         if test $target_os = "mingw32ce"; then
3694             disable network
3695         else
3696             target_os=mingw32
3697         fi
3698         LIBTARGET=i386
3699         if enabled x86_64; then
3700             LIBTARGET="i386:x86-64"
3701         elif enabled arm; then
3702             LIBTARGET=arm-wince
3703         fi
3704         check_ldflags -Wl,--nxcompat
3705         check_ldflags -Wl,--dynamicbase
3706         shlibdir_default="$bindir_default"
3707         SLIBPREF=""
3708         SLIBSUF=".dll"
3709         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3710         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3711         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3712         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3713         SLIB_INSTALL_LINKS=
3714         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3715         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3716         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3717         objformat="win32"
3718         dlltool="${cross_prefix}dlltool"
3719         ranlib=:
3720         enable dos_paths
3721         ;;
3722     win32|win64)
3723         disable symver
3724         if enabled shared; then
3725             # Link to the import library instead of the normal static library
3726             # for shared libs.
3727             LD_LIB='%.lib'
3728             # Cannot build both shared and static libs with MSVC or icl.
3729             disable static
3730         fi
3731         shlibdir_default="$bindir_default"
3732         SLIBPREF=""
3733         SLIBSUF=".dll"
3734         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3735         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3736         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3737         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3738         SLIB_INSTALL_LINKS=
3739         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3740         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3741         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3742         objformat="win32"
3743         ranlib=:
3744         enable dos_paths
3745         ;;
3746     cygwin*)
3747         target_os=cygwin
3748         shlibdir_default="$bindir_default"
3749         SLIBPREF="cyg"
3750         SLIBSUF=".dll"
3751         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3752         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3753         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3754         SLIB_INSTALL_LINKS=
3755         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3756         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3757         objformat="win32"
3758         enable dos_paths
3759         ;;
3760     *-dos|freedos|opendos)
3761         network_extralibs="-lsocket"
3762         objformat="coff"
3763         enable dos_paths
3764         add_cppflags -U__STRICT_ANSI__
3765         ;;
3766     linux)
3767         enable dv1394
3768         enable section_data_rel_ro
3769         ;;
3770     irix*)
3771         target_os=irix
3772         ranlib="echo ignoring ranlib"
3773         ;;
3774     os/2*)
3775         ln_s="cp -f"
3776         objformat="aout"
3777         add_cppflags -D_GNU_SOURCE
3778         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3779         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3780         LIBSUF="_s.a"
3781         SLIBPREF=""
3782         SLIBSUF=".dll"
3783         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3784         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3785         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3786             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3787             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3788             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3789             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3790         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3791             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3792         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3793         enable dos_paths
3794         ;;
3795     gnu/kfreebsd)
3796         add_cppflags -D_BSD_SOURCE
3797         ;;
3798     gnu)
3799         ;;
3800     qnx)
3801         add_cppflags -D_QNX_SOURCE
3802         network_extralibs="-lsocket"
3803         ;;
3804     symbian)
3805         SLIBSUF=".dll"
3806         enable dos_paths
3807         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3808         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3809         add_ldflags -Wl,--target1-abs,--no-undefined \
3810                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3811                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3812         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3813                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3814                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3815         ;;
3816     osf1)
3817         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3818         ;;
3819     minix)
3820         ;;
3821     plan9)
3822         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3823                      -D_REENTRANT_SOURCE        \
3824                      -D_RESEARCH_SOURCE         \
3825                      -DFD_SETSIZE=96            \
3826                      -DHAVE_SOCK_OPTS
3827         add_compat strtod.o strtod=avpriv_strtod
3828         network_extralibs='-lbsd'
3829         exeobjs=compat/plan9/main.o
3830         cp_f='cp'
3831         ;;
3832     none)
3833         ;;
3834     *)
3835         die "Unknown OS '$target_os'."
3836         ;;
3837 esac
3838
3839 # determine libc flavour
3840
3841 probe_libc(){
3842     pfx=$1
3843     pfx_no_=${pfx%_}
3844     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3845     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3846         eval ${pfx}libc_type=uclibc
3847         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3848     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3849         eval ${pfx}libc_type=glibc
3850         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3851     # MinGW headers can be installed on Cygwin, so check for newlib first.
3852     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3853         eval ${pfx}libc_type=newlib
3854         add_${pfx}cppflags -U__STRICT_ANSI__
3855     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3856     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3857         eval ${pfx}libc_type=mingw64
3858         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3859         eval test \$${pfx_no_}cc_type = "gcc" &&
3860             add_${pfx}cppflags -D__printf__=__gnu_printf__
3861     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3862          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3863         eval ${pfx}libc_type=mingw32
3864         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3865             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3866             die "ERROR: MinGW32 runtime version must be >= 3.15."
3867         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3868         eval test \$${pfx_no_}cc_type = "gcc" &&
3869             add_${pfx}cppflags -D__printf__=__gnu_printf__
3870     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3871         eval ${pfx}libc_type=msvcrt
3872         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
3873             if [ "$pfx" = host_ ]; then
3874                 add_host_cppflags -Dsnprintf=_snprintf
3875             else
3876                 add_compat strtod.o strtod=avpriv_strtod
3877                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3878                                              _snprintf=avpriv_snprintf  \
3879                                              vsnprintf=avpriv_vsnprintf
3880             fi
3881         fi
3882         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3883         # 0x601 by default unless something else is set by the user.
3884         # This can easily lead to us detecting functions only present
3885         # in such new versions and producing binaries requiring windows 7.0.
3886         # Therefore explicitly set the default to XP unless the user has
3887         # set something else on the command line.
3888         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
3889         # family. For these cases, configure is free to use any functions
3890         # found in the SDK headers by default. (Alternatively, we could force
3891         # _WIN32_WINNT to 0x0602 in that case.)
3892         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
3893             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
3894 #ifdef WINAPI_FAMILY
3895 #include <winapifamily.h>
3896 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
3897 #error not desktop
3898 #endif
3899 #endif
3900 EOF
3901     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
3902         eval ${pfx}libc_type=klibc
3903     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
3904         eval ${pfx}libc_type=bionic
3905     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
3906         eval ${pfx}libc_type=solaris
3907         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
3908     else
3909         eval ${pfx}libc_type=default
3910         add_${pfx}cppflags -D_DEFAULT_SOURCE
3911     fi
3912 }
3913
3914 probe_libc
3915 test -n "$libc_type" && enable libc_$libc_type
3916 probe_libc host_
3917 test -n "$host_libc_type" && enable host_libc_$host_libc_type
3918
3919 case $libc_type in
3920     bionic)
3921         add_compat strtod.o strtod=avpriv_strtod
3922         ;;
3923 esac
3924
3925 # hacks for compiler/libc/os combinations
3926
3927 if enabled_all tms470 libc_glibc; then
3928     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
3929     add_cppflags -D__USER_LABEL_PREFIX__=
3930     add_cppflags -D__builtin_memset=memset
3931     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
3932     add_cflags   -pds=48    # incompatible redefinition of macro
3933 fi
3934
3935 if enabled_all ccc libc_glibc; then
3936     add_ldflags -Wl,-z,now  # calls to libots crash without this
3937 fi
3938
3939 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
3940     add_cppflags '-I\$(SRC_PATH)/compat/float'
3941
3942 esc(){
3943     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
3944 }
3945
3946 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
3947
3948 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
3949
3950 set_default $PATHS_LIST
3951 set_default nm
3952
3953 # we need to build at least one lib type
3954 if ! enabled_any static shared; then
3955     cat <<EOF
3956 At least one library type must be built.
3957 Specify --enable-static to build the static libraries or --enable-shared to
3958 build the shared libraries as well. To only build the shared libraries specify
3959 --disable-static in addition to --enable-shared.
3960 EOF
3961     exit 1;
3962 fi
3963
3964 die_license_disabled() {
3965     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
3966 }
3967
3968 die_license_disabled gpl libcdio
3969 die_license_disabled gpl libx264
3970 die_license_disabled gpl libx265
3971 die_license_disabled gpl libxavs
3972 die_license_disabled gpl libxvid
3973 die_license_disabled gpl x11grab
3974
3975 die_license_disabled nonfree libfaac
3976 die_license_disabled nonfree libfdk_aac
3977 die_license_disabled nonfree nvenc
3978 die_license_disabled nonfree openssl
3979
3980 die_license_disabled version3 libopencore_amrnb
3981 die_license_disabled version3 libopencore_amrwb
3982 die_license_disabled version3 libvo_aacenc
3983 die_license_disabled version3 libvo_amrwbenc
3984
3985 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
3986
3987 disabled optimizations || check_cflags -fomit-frame-pointer
3988
3989 enable_weak_pic() {
3990     disabled pic && return
3991     enable pic
3992     add_cppflags -DPIC
3993     case "$target_os" in
3994     mingw*|cygwin*)
3995         ;;
3996     *)
3997         add_cflags -fPIC
3998         ;;
3999     esac
4000     add_asflags  -fPIC
4001 }
4002
4003 enabled pic && enable_weak_pic
4004
4005 check_cc <<EOF || die "Symbol mangling check failed."
4006 int ff_extern;
4007 EOF
4008 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4009 extern_prefix=${sym%%ff_extern*}
4010
4011 check_cc <<EOF && enable_weak inline_asm
4012 void foo(void) { __asm__ volatile ("" ::); }
4013 EOF
4014
4015 _restrict=
4016 for restrict_keyword in restrict __restrict__ __restrict; do
4017     check_cc <<EOF && _restrict=$restrict_keyword && break
4018 void foo(char * $restrict_keyword p);
4019 EOF
4020 done
4021
4022 check_cc <<EOF && enable pragma_deprecated
4023 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4024 EOF
4025
4026 check_cc <<EOF && enable attribute_packed
4027 struct { int x; } __attribute__((packed)) x;
4028 EOF
4029
4030 check_cc <<EOF && enable attribute_may_alias
4031 union { int x; } __attribute__((may_alias)) x;
4032 EOF
4033
4034 check_cc <<EOF || die "endian test failed"
4035 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4036 EOF
4037 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4038
4039 check_gas() {
4040     log "check_gas using '$as' as AS"
4041     # :vararg is used on aarch64, arm and ppc altivec
4042     check_as <<EOF || return 1
4043 .macro m n, y:vararg=0
4044 \n: .int \y
4045 .endm
4046 m x
4047 EOF
4048     # .altmacro is only used in arm asm
4049     ! enabled arm || check_as <<EOF || return 1
4050 .altmacro
4051 EOF
4052     enable gnu_as
4053     return 0
4054 }
4055
4056 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4057     nogas=:
4058     enabled_any arm aarch64 && nogas=die
4059     enabled_all ppc altivec && nogas=warn
4060     as_noop=-v
4061
4062     case $as_type in
4063         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4064         gcc)  gaspp_as_type=gas ;;
4065         *)    gaspp_as_type=$as_type ;;
4066     esac
4067
4068     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4069
4070     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4071         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4072
4073     if ! check_gas ; then
4074         as=${gas:=$as}
4075         check_gas || \
4076             $nogas "GNU assembler not found, install/update gas-preprocessor"
4077     fi
4078
4079     check_as <<EOF && enable as_func
4080 .func test
4081 .endfunc
4082 EOF
4083 fi
4084
4085 check_inline_asm inline_asm_labels '"1:\n"'
4086
4087 if enabled aarch64; then
4088     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4089     # internal assembler in clang 3.3 does not support this instruction
4090     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4091     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4092
4093     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4094
4095 elif enabled alpha; then
4096
4097     check_cflags -mieee
4098
4099 elif enabled arm; then
4100
4101     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4102     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4103     enabled thumb && check_cflags -mthumb || check_cflags -marm
4104
4105     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4106         enable vfp_args
4107     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4108         enable vfp_args
4109     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4110         case "${cross_prefix:-$cc}" in
4111             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4112             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4113 __asm__ (".eabi_attribute 28, 1");
4114 int main(void) { return 0; }
4115 EOF
4116         esac
4117         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4118     fi
4119
4120     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4121     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4122     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4123     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4124     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4125     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4126
4127     [ $target_os = linux ] || [ $target_os = android ] ||
4128         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4129             $ARCH_EXT_LIST_ARM
4130
4131     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4132
4133     check_as <<EOF && enable as_dn_directive
4134 ra .dn d0.i16
4135 .unreq ra
4136 EOF
4137
4138     # llvm's integrated assembler supports .object_arch from llvm 3.5
4139     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4140 .object_arch armv4
4141 EOF
4142
4143     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4144
4145 elif enabled mips; then
4146
4147     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4148
4149     # make sure that only an instruction set is enabled
4150     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4151
4152     if enabled mips64; then
4153         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4154             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4155                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4156     else
4157         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4158             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4159                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4160     fi
4161
4162 elif enabled parisc; then
4163
4164     if enabled gcc; then
4165         case $($cc -dumpversion) in
4166             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4167         esac
4168     fi
4169
4170 elif enabled ppc; then
4171
4172     enable local_aligned_8 local_aligned_16
4173
4174     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4175     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4176     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4177     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4178
4179     # AltiVec flags: The FSF version of GCC differs from the Apple version
4180     if enabled altivec; then
4181         check_cflags -maltivec -mabi=altivec &&
4182         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4183         check_cflags -faltivec
4184
4185         # check if our compiler supports Motorola AltiVec C API
4186         check_cc <<EOF || disable altivec
4187 $inc_altivec_h
4188 int main(void) {
4189     vector signed int v1 = (vector signed int) { 0 };
4190     vector signed int v2 = (vector signed int) { 1 };
4191     v1 = vec_add(v1, v2);
4192     return 0;
4193 }
4194 EOF
4195
4196         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4197     fi
4198
4199     if enabled vsx; then
4200         check_cflags -mvsx &&
4201         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4202     fi
4203
4204     if enabled power8; then
4205         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4206     fi
4207
4208 elif enabled x86; then
4209
4210     check_builtin rdtsc    intrin.h   "__rdtsc()"
4211     check_builtin mm_empty mmintrin.h "_mm_empty()"
4212
4213     enable local_aligned_8 local_aligned_16
4214
4215     # check whether EBP is available on x86
4216     # As 'i' is stored on the stack, this program will crash
4217     # if the base pointer is used to access it because the
4218     # base pointer is cleared in the inline assembly code.
4219     check_exec_crash <<EOF && enable ebp_available
4220 volatile int i=0;
4221 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4222 return i;
4223 EOF
4224
4225     # check whether EBX is available on x86
4226     check_inline_asm ebx_available '""::"b"(0)' &&
4227         check_inline_asm ebx_available '"":::"%ebx"'
4228
4229     # check whether xmm clobbers are supported
4230     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4231
4232     # check whether binutils is new enough to compile SSSE3/MMXEXT
4233     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4234     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4235
4236     if ! disabled_any asm mmx yasm; then
4237         if check_cmd $yasmexe --version; then
4238             enabled x86_64 && yasm_extra="-m amd64"
4239             yasm_debug="-g dwarf2"
4240         elif check_cmd nasm -v; then
4241             yasmexe=nasm
4242             yasm_debug="-g -F dwarf"
4243             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4244         fi
4245
4246         YASMFLAGS="-f $objformat $yasm_extra"
4247         enabled pic               && append YASMFLAGS "-DPIC"
4248         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4249         case "$objformat" in
4250             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4251         esac
4252
4253         check_yasm "movbe ecx, [5]" && enable yasm ||
4254             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4255         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4256         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4257         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4258         check_yasm "CPU amdnop" || disable cpunop
4259     fi
4260
4261     case "$cpu" in
4262         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4263             disable fast_clz
4264         ;;
4265     esac
4266
4267 fi
4268
4269 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4270
4271 check_ldflags -Wl,--as-needed
4272
4273 if check_func dlopen; then
4274     ldl=
4275 elif check_func dlopen -ldl; then
4276     ldl=-ldl
4277 fi
4278
4279 if ! disabled network; then
4280     check_func getaddrinfo $network_extralibs
4281     check_func inet_aton $network_extralibs
4282
4283     check_type netdb.h "struct addrinfo"
4284     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4285     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4286     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4287     check_type poll.h "struct pollfd"
4288     check_type netinet/sctp.h "struct sctp_event_subscribe"
4289     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4290     check_type netinet/in.h "struct sockaddr_in6"
4291     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4292     check_type "sys/types.h sys/socket.h" socklen_t
4293
4294     # Prefer arpa/inet.h over winsock2
4295     if check_header arpa/inet.h ; then
4296         check_func closesocket
4297     elif check_header winsock2.h ; then
4298         check_func_headers winsock2.h closesocket -lws2 &&
4299             network_extralibs="-lws2" ||
4300         { check_func_headers winsock2.h closesocket -lws2_32 &&
4301             network_extralibs="-lws2_32"; } || disable winsock2_h network
4302         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4303
4304         check_type ws2tcpip.h socklen_t
4305         check_type ws2tcpip.h "struct addrinfo"
4306         check_type ws2tcpip.h "struct group_source_req"
4307         check_type ws2tcpip.h "struct ip_mreq_source"
4308         check_type ws2tcpip.h "struct ipv6_mreq"
4309         check_type winsock2.h "struct pollfd"
4310         check_struct winsock2.h "struct sockaddr" sa_len
4311         check_type ws2tcpip.h "struct sockaddr_in6"
4312         check_type ws2tcpip.h "struct sockaddr_storage"
4313     else
4314         disable network
4315     fi
4316 fi
4317
4318 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4319 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4320 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4321 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4322
4323 case "$custom_allocator" in
4324     jemalloc)
4325         # jemalloc by default does not use a prefix
4326         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4327     ;;
4328     tcmalloc)
4329         require_pkg_config libtcmalloc gperftools/tcmalloc.h tc_malloc
4330         malloc_prefix=tc_
4331     ;;
4332 esac
4333
4334 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4335 check_func  ${malloc_prefix}memalign            && enable memalign
4336 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4337
4338 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4339     check_func_headers time.h clock_gettime || { check_func_headers time.h clock_gettime -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
4340
4341 check_func  fcntl
4342 check_func  fork
4343 check_func  gethrtime
4344 check_func  getopt
4345 check_func  getrusage
4346 check_func  gettimeofday
4347 check_func  gmtime_r
4348 check_func  isatty
4349 check_func  localtime_r
4350 check_func  mach_absolute_time
4351 check_func  mkstemp
4352 check_func  mmap
4353 check_func  mprotect
4354 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4355 check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt; }
4356 check_func  sched_getaffinity
4357 check_func  setrlimit
4358 check_func  strerror_r
4359 check_func  sysconf
4360 check_func  sysctl
4361 check_func  usleep
4362
4363 check_func_headers io.h setmode
4364 check_func_headers stdlib.h getenv
4365
4366 check_func_headers windows.h CoTaskMemFree -lole32
4367 check_func_headers windows.h GetProcessAffinityMask
4368 check_func_headers windows.h GetProcessTimes
4369 check_func_headers windows.h GetSystemTimeAsFileTime
4370 check_func_headers windows.h LoadLibrary
4371 check_func_headers windows.h MapViewOfFile
4372 check_func_headers windows.h SetConsoleTextAttribute
4373 check_func_headers windows.h Sleep
4374 check_func_headers windows.h VirtualAlloc
4375 check_struct windows.h "CONDITION_VARIABLE" Ptr
4376
4377 check_header direct.h
4378 check_header dlfcn.h
4379 check_header d3d11.h
4380 check_header dxva.h
4381 check_header dxva2api.h
4382 check_header io.h
4383 check_header mach/mach_time.h
4384 check_header malloc.h
4385 check_header poll.h
4386 check_header sys/mman.h
4387 check_header sys/param.h
4388 check_header sys/resource.h
4389 check_header sys/select.h
4390 check_header sys/time.h
4391 check_header sys/un.h
4392 check_header unistd.h
4393 check_header valgrind/valgrind.h
4394 check_header vdpau/vdpau.h
4395 check_header vdpau/vdpau_x11.h
4396 check_header VideoDecodeAcceleration/VDADecoder.h
4397 check_header windows.h
4398 check_header X11/extensions/XvMClib.h
4399
4400 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
4401 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
4402 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
4403
4404 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4405
4406 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4407 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4408 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4409
4410 if ! disabled w32threads && ! enabled pthreads; then
4411     check_func_headers "windows.h process.h" _beginthreadex &&
4412         enable w32threads || disable w32threads
4413 fi
4414
4415 # check for some common methods of building with pthread support
4416 # do this before the optional library checks as some of them require pthreads
4417 if ! disabled pthreads && ! enabled w32threads; then
4418     enable pthreads
4419     if check_func pthread_join -pthread; then
4420         add_cflags -pthread
4421         add_extralibs -pthread
4422     elif check_func pthread_join -pthreads; then
4423         add_cflags -pthreads
4424         add_extralibs -pthreads
4425     elif check_func pthread_join -lpthreadGC2; then
4426         add_extralibs -lpthreadGC2
4427     elif check_lib pthread.h pthread_join -lpthread; then
4428         :
4429     elif ! check_func pthread_join; then
4430         disable pthreads
4431     fi
4432 fi
4433
4434 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
4435 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4436
4437 check_lib math.h sin -lm && LIBM="-lm"
4438 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4439
4440 atan2f_args=2
4441 ldexpf_args=2
4442 powf_args=2
4443
4444 for func in $MATH_FUNCS; do
4445     eval check_mathfunc $func \${${func}_args:-1}
4446 done
4447
4448 # these are off by default, so fail if requested and not available
4449 enabled avisynth          && { check_lib2 "avisynth/avisynth_c.h windows.h" LoadLibrary ||
4450                                check_lib2 "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl   ||
4451                                die "ERROR: LoadLibrary/dlopen not found, or avisynth header not found"; }
4452 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4453 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4454 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4455 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4456 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4457 enabled libfdk_aac        && require_pkg_config fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4458 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4459 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4460 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4461                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4462                                done || die "ERROR: libgsm not found"; }
4463 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4464 enabled libkvazaar        && require_pkg_config "kvazaar >= 0.7.1" kvazaar.h kvz_api_get
4465 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
4466 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4467 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4468 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4469 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4470 enabled libopenh264       && require_pkg_config openh264 wels/codec_api.h WelsGetCodecVersion
4471 enabled libopenjpeg       && { { check_header openjpeg.h && check_lib2 openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC; } ||
4472                                { require_pkg_config libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; } }
4473 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4474 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4475 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4476 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4477 enabled libsnappy         && require snappy snappy-c.h snappy_compress -lsnappy
4478 enabled libspeex          && require_pkg_config speex speex/speex.h speex_decoder_init -lspeex
4479 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4480 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4481 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4482 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4483 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4484 enabled libvpx            && require_pkg_config "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4485     enabled libvpx_vp8_decoder && {
4486         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4487             disable libvpx_vp8_decoder;
4488     }
4489     enabled libvpx_vp8_encoder && {
4490         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4491             disable libvpx_vp8_encoder;
4492     }
4493     enabled libvpx_vp9_decoder && {
4494         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4495             disable libvpx_vp9_decoder;
4496     }
4497     enabled libvpx_vp9_encoder && {
4498         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4499             disable libvpx_vp9_encoder;
4500     }
4501     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4502         die "libvpx enabled but no supported decoders found"
4503     fi
4504 }
4505 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4506 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4507 enabled libx264           && require_pkg_config x264 "stdint.h x264.h" x264_encoder_encode &&
4508                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4509                                die "ERROR: libx264 version must be >= 0.118."; } &&
4510                              { check_cpp_condition x264.h "X264_MPEG2" &&
4511                                enable libx262; }
4512 enabled libx265           && require_pkg_config x265 x265.h x265_api_get &&
4513                              { check_cpp_condition x265.h "X265_BUILD >= 57" ||
4514                                die "ERROR: libx265 version must be >= 57."; }
4515 enabled libxavs           && require libxavs xavs.h xavs_encoder_encode -lxavs
4516 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4517 enabled mmal              && { check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4518                                 { ! enabled cross_compile && {
4519                                     add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline ;
4520                                     add_extralibs -L/opt/vc/lib/ -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ;
4521                                     check_lib interface/mmal/mmal.h mmal_port_connect ; }
4522                                 check_lib interface/mmal/mmal.h mmal_port_connect ; } ||
4523                                die "ERROR: mmal not found"; }
4524 enabled openssl           && { check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4525                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4526                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4527                                die "ERROR: openssl not found"; }
4528
4529 if enabled gnutls; then
4530     { check_lib2 gmp.h mpz_export -lgmp && enable gmp; } ||
4531     { check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }
4532 fi
4533
4534 # libdc1394 check
4535 if enabled libdc1394; then
4536     { require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new &&
4537         enable libdc1394_2; } ||
4538     { check_lib libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394 &&
4539         enable libdc1394_1; } ||
4540     die "ERROR: No version of libdc1394 found "
4541 fi
4542
4543 if enabled nvenc; then
4544     check_header cuda.h || die "ERROR: cuda.h not found.";
4545     check_header nvEncodeAPI.h || die "ERROR: nvEncodeAPI.h not found.";
4546     check_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 5" ||
4547         die "ERROR: NVENC API version 4 or older is not supported";
4548 fi
4549
4550 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4551     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4552     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4553     enable sdl
4554 fi
4555
4556 pod2man --help     > /dev/null 2>&1 && enable pod2man   || disable pod2man
4557 texi2html -version > /dev/null 2>&1 && enable texi2html || disable texi2html
4558
4559 check_header linux/fb.h
4560 check_header linux/videodev2.h
4561 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4562
4563 check_header sys/videoio.h
4564
4565 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
4566 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4567 # w32api 3.12 had it defined wrong
4568 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4569
4570 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4571 { check_header dev/bktr/ioctl_meteor.h &&
4572   check_header dev/bktr/ioctl_bt848.h; } ||
4573 { check_header machine/ioctl_meteor.h &&
4574   check_header machine/ioctl_bt848.h; } ||
4575 { check_header dev/video/meteor/ioctl_meteor.h &&
4576   check_header dev/video/bktr/ioctl_bt848.h; } ||
4577 check_header dev/ic/bt8xx.h
4578
4579 check_header sndio.h
4580 check_header sys/soundcard.h
4581 check_header soundcard.h
4582
4583 enabled_any alsa_indev alsa_outdev &&
4584     check_lib2 alsa/asoundlib.h snd_pcm_htimestamp -lasound
4585
4586 enabled jack_indev && check_lib2 jack/jack.h jack_client_open -ljack &&
4587     check_func jack_port_get_latency_range -ljack
4588
4589 enabled_any sndio_indev sndio_outdev && check_lib2 sndio.h sio_open -lsndio
4590
4591 if enabled libcdio; then
4592     check_lib2 "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4593     check_lib2 "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4594     die "ERROR: No usable libcdio/cdparanoia found"
4595 fi
4596
4597 check_lib X11/Xlib.h XOpenDisplay -lX11 && enable xlib
4598
4599 if enabled libxcb || enabled x11grab && ! disabled libxcb; then
4600     check_pkg_config xcb-shape xcb/shape.h xcb_shape_rectangles || {
4601         enabled libxcb && die "ERROR: libxcb not found";
4602     } && disable x11grab && enable libxcb
4603
4604     disabled libxcb_shm ||
4605         check_pkg_config xcb-shm xcb/shm.h xcb_shm_attach || {
4606             enabled libxcb_shm && die "ERROR: libxcb_shm not found";
4607         } && check_header sys/shm.h && enable libxcb_shm
4608
4609     disabled libxcb_xfixes ||
4610         check_pkg_config xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image || {
4611             enabled libxcb_xfixes && die "ERROR: libxcb_xfixes not found";
4612         } && enable libxcb_xfixes
4613
4614     add_cflags "$xcb_event_cflags $xcb_shm_cflags $xcb_xfixes_cflags"
4615     add_extralibs "$xcb_event_libs $xcb_shm_libs $xcb_xfixes_libs"
4616 fi
4617
4618 if enabled x11grab; then
4619     enabled xlib || die "ERROR: Xlib not found"
4620     require Xext X11/extensions/XShm.h XShmCreateImage -lXext
4621     require Xfixes X11/extensions/Xfixes.h XFixesGetCursorImage -lXfixes
4622 fi
4623
4624 enabled vaapi && enabled xlib &&
4625     check_lib2 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 &&
4626     enable vaapi_x11
4627
4628 enabled vdpau &&
4629     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4630     disable vdpau
4631
4632 enabled vdpau && enabled xlib &&
4633     check_func_headers "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau &&
4634     prepend avconv_libs $($ldflags_filter "-lvdpau") &&
4635     enable vdpau_x11
4636
4637 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4638
4639 # add some useful compiler flags if supported
4640 check_cflags -Wdeclaration-after-statement
4641 check_cflags -Wall
4642 check_cflags -Wdisabled-optimization
4643 check_cflags -Wpointer-arith
4644 check_cflags -Wredundant-decls
4645 check_cflags -Wcast-qual
4646 check_cflags -Wwrite-strings
4647 check_cflags -Wtype-limits
4648 check_cflags -Wundef
4649 check_cflags -Wmissing-prototypes
4650 check_cflags -Wstrict-prototypes
4651 enabled extra_warnings && check_cflags -Winline
4652
4653 check_disable_warning(){
4654     warning_flag=-W${1#-Wno-}
4655     test_cflags $warning_flag && add_cflags $1
4656 }
4657
4658 check_disable_warning -Wno-parentheses
4659 check_disable_warning -Wno-switch
4660 check_disable_warning -Wno-format-zero-length
4661 check_disable_warning -Wno-pointer-sign
4662
4663 # add some linker flags
4664 check_ldflags -Wl,--warn-common
4665 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4666 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir
4667 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
4668
4669 # add some strip flags
4670 # -wN '..@*' is more selective than -x, but not available everywhere.
4671 check_stripflags -wN \'..@*\' || check_stripflags -x || strip='true'
4672
4673 enabled neon_clobber_test &&
4674     check_ldflags -Wl,--wrap,avcodec_open2              \
4675                   -Wl,--wrap,avcodec_decode_audio4      \
4676                   -Wl,--wrap,avcodec_decode_video2      \
4677                   -Wl,--wrap,avcodec_decode_subtitle2   \
4678                   -Wl,--wrap,avcodec_encode_audio2      \
4679                   -Wl,--wrap,avcodec_encode_video2      \
4680                   -Wl,--wrap,avcodec_encode_subtitle    \
4681                   -Wl,--wrap,avresample_convert ||
4682     disable neon_clobber_test
4683
4684 enabled xmm_clobber_test &&
4685     check_ldflags -Wl,--wrap,avcodec_open2              \
4686                   -Wl,--wrap,avcodec_decode_audio4      \
4687                   -Wl,--wrap,avcodec_decode_video2      \
4688                   -Wl,--wrap,avcodec_decode_subtitle2   \
4689                   -Wl,--wrap,avcodec_encode_audio2      \
4690                   -Wl,--wrap,avcodec_encode_video2      \
4691                   -Wl,--wrap,avcodec_encode_subtitle    \
4692                   -Wl,--wrap,avresample_convert         \
4693                   -Wl,--wrap,sws_scale ||
4694     disable xmm_clobber_test
4695
4696 echo "X { local: *; };" > $TMPV
4697 if test_ldflags -Wl,--version-script,$TMPV; then
4698     append SHFLAGS '-Wl,--version-script,\$(SUBDIR)lib\$(NAME).ver'
4699 elif test_ldflags -Wl,-M,$TMPV; then
4700     append SHFLAGS '-Wl,-M,\$(SUBDIR)lib\$(NAME).ver-sol2'
4701 fi
4702
4703 check_cc <<EOF && enable symver_asm_label
4704 void ff_foo(void) __asm__ ("av_foo@VERSION");
4705 void ff_foo(void) { ${inline_asm+__asm__($quotes);} }
4706 EOF
4707     check_cc <<EOF && enable symver_gnu_asm
4708 __asm__(".symver ff_foo,av_foo@VERSION");
4709 void ff_foo(void) {}
4710 EOF
4711
4712 if [ -z "$optflags" ]; then
4713     if enabled small; then
4714         optflags=$cflags_size
4715     elif enabled optimizations; then
4716         optflags=$cflags_speed
4717     else
4718         optflags=$cflags_noopt
4719     fi
4720 fi
4721
4722 check_optflags(){
4723     check_cflags "$@"
4724     enabled lto && check_ldflags "$@"
4725 }
4726
4727
4728 if enabled lto; then
4729     test "$cc_type" != "$ld_type" && die "LTO requires same compiler and linker"
4730     check_cflags  -flto
4731     check_ldflags -flto $cpuflags
4732 fi
4733
4734 check_optflags $optflags
4735 check_optflags -fno-math-errno
4736 check_optflags -fno-signed-zeros
4737
4738 if enabled icc; then
4739     # Just warnings, no remarks
4740     check_cflags -w1
4741     # -wd: Disable following warnings
4742     # 144, 167, 556: -Wno-pointer-sign
4743     # 1292: attribute "foo" ignored
4744     # 1419: external declaration in primary source file
4745     # 10006: ignoring unknown option -fno-signed-zeros
4746     # 10148: ignoring unknown option -Wno-parentheses
4747     # 10156: ignoring option '-W'; no argument required
4748     check_cflags -wd144,167,556,1292,1419,10006,10148,10156
4749     # 11030: Warning unknown option --as-needed
4750     # 10156: ignoring option '-export'; no argument required
4751     check_ldflags -wd10156,11030
4752     # icc 11.0 and 11.1 work with ebp_available, but don't pass the test
4753     enable ebp_available
4754     if enabled x86_32; then
4755         icc_version=$($cc -dumpversion)
4756         test ${icc_version%%.*} -ge 11 &&
4757             check_cflags -falign-stack=maintain-16-byte ||
4758             disable aligned_stack
4759     fi
4760 elif enabled ccc; then
4761     # disable some annoying warnings
4762     add_cflags -msg_disable bitnotint
4763     add_cflags -msg_disable mixfuncvoid
4764     add_cflags -msg_disable nonstandcast
4765     add_cflags -msg_disable unsupieee
4766 elif enabled gcc; then
4767     check_optflags -fno-tree-vectorize
4768     check_cflags -Werror=implicit-function-declaration
4769     check_cflags -Werror=missing-prototypes
4770     check_cflags -Werror=return-type
4771     check_cflags -Werror=declaration-after-statement
4772     check_cflags -Werror=vla
4773     check_cflags -Werror=format-security
4774     check_cflags -fdiagnostics-color=auto
4775     enabled extra_warnings || check_disable_warning -Wno-maybe-uninitialized
4776 elif enabled llvm_gcc; then
4777     check_cflags -mllvm -stack-alignment=16
4778 elif enabled clang; then
4779     check_cflags -mllvm -stack-alignment=16
4780     check_cflags -Qunused-arguments
4781     check_cflags -Werror=implicit-function-declaration
4782     check_cflags -Werror=missing-prototypes
4783     check_cflags -Werror=return-type
4784 elif enabled cparser; then
4785     add_cflags -Wno-missing-variable-declarations
4786     add_cflags -Wno-empty-statement
4787 elif enabled armcc; then
4788     add_cflags -W${armcc_opt},--diag_suppress=4343 # hardfp compat
4789     add_cflags -W${armcc_opt},--diag_suppress=3036 # using . as system include dir
4790     # 2523: use of inline assembly is deprecated
4791     add_cflags -W${armcc_opt},--diag_suppress=2523
4792     add_cflags -W${armcc_opt},--diag_suppress=1207
4793     add_cflags -W${armcc_opt},--diag_suppress=1293 # assignment in condition
4794     add_cflags -W${armcc_opt},--diag_suppress=3343 # hardfp compat
4795     add_cflags -W${armcc_opt},--diag_suppress=167  # pointer sign
4796     add_cflags -W${armcc_opt},--diag_suppress=513  # pointer sign
4797 elif enabled tms470; then
4798     add_cflags -pds=824 -pds=837
4799     disable inline_asm
4800 elif enabled pathscale; then
4801     add_cflags -fstrict-overflow -OPT:wrap_around_unsafe_opt=OFF
4802 elif enabled_any msvc icl; then
4803     enabled x86_32 && disable aligned_stack
4804     enabled_all x86_32 debug && add_cflags -Oy-
4805     enabled debug && add_ldflags -debug
4806     enable pragma_deprecated
4807     if enabled icl; then
4808         # -Qansi-alias is basically -fstrict-aliasing, but does not work
4809         # (correctly) on icl 13.x.
4810         check_cpp_condition "windows.h" "__ICL < 1300 || __ICL >= 1400" &&
4811             add_cflags -Qansi-alias
4812         # icl will pass the inline asm tests but inline asm is currently
4813         # not supported (build will fail)
4814         disable inline_asm
4815     fi
4816     # msvcrt10 x64 incorrectly enables log2, only msvcrt12 (MSVC 2013) onwards actually has log2.
4817     check_cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION >= 12" || disable log2
4818     # The CRT headers contain __declspec(restrict) in a few places, but if redefining
4819     # restrict, this might break. MSVC 2010 and 2012 fail with __declspec(__restrict)
4820     # (as it ends up if the restrict redefine is done before including stdlib.h), while
4821     # MSVC 2013 and newer can handle it fine.
4822     # If this declspec fails, force including stdlib.h before the restrict redefinition
4823     # happens in config.h.
4824     if [ $_restrict != restrict ]; then
4825         check_cc <<EOF || add_cflags -FIstdlib.h
4826 __declspec($_restrict) void* foo(int);
4827 EOF
4828     fi
4829     check_func strtoll || add_cflags -Dstrtoll=_strtoi64
4830 fi
4831
4832 for pfx in "" host_; do
4833     varname=${pfx%_}cc_type
4834     eval "type=\$$varname"
4835     if [ $type = "msvc" ]; then
4836         check_${pfx}cc <<EOF || add_${pfx}cflags -Dinline=__inline
4837 static inline int foo(int a) { return a; }
4838 EOF
4839     fi
4840 done
4841
4842 case $as_type in
4843     clang)
4844         add_asflags -Qunused-arguments
4845     ;;
4846 esac
4847
4848 case $ld_type in
4849     clang)
4850         check_ldflags -Qunused-arguments
4851     ;;
4852 esac
4853
4854 case $target_os in
4855     osf1)