git.sesse.net Git - ffmpeg/blob - configure

   1 #!/bin/sh
   2 #
   3 # Libav configure script
   4 #
   5 # Copyright (c) 2000-2002 Fabrice Bellard
   6 # Copyright (c) 2005-2008 Diego Biurrun
   7 # Copyright (c) 2005-2008 Mans Rullgard
   8 #
   9
  10 # Prevent locale nonsense from breaking basic text processing.
  11 LC_ALL=C
  12 export LC_ALL
  13
  14 # make sure we are running under a compatible shell
  15 # try to make this part work with most shells
  16
  17 try_exec(){
  18     echo "Trying shell $1"
  19     type "$1" > /dev/null 2>&1 && exec "$@"
  20 }
  21
  22 unset foo
  23 (: ${foo%%bar}) 2> /dev/null
  24 E1="$?"
  25
  26 (: ${foo?}) 2> /dev/null
  27 E2="$?"
  28
  29 if test "$E1" != 0 || test "$E2" = 0; then
  30     echo "Broken shell detected.  Trying alternatives."
  31     export FF_CONF_EXEC
  32     if test "0$FF_CONF_EXEC" -lt 1; then
  33         FF_CONF_EXEC=1
  34         try_exec bash "$0" "$@"
  35     fi
  36     if test "0$FF_CONF_EXEC" -lt 2; then
  37         FF_CONF_EXEC=2
  38         try_exec ksh "$0" "$@"
  39     fi
  40     if test "0$FF_CONF_EXEC" -lt 3; then
  41         FF_CONF_EXEC=3
  42         try_exec /usr/xpg4/bin/sh "$0" "$@"
  43     fi
  44     echo "No compatible shell script interpreter found."
  45     echo "This configure script requires a POSIX-compatible shell"
  46     echo "such as bash or ksh."
  47     echo "THIS IS NOT A BUG IN LIBAV, DO NOT REPORT IT AS SUCH."
  48     echo "Instead, install a working POSIX-compatible shell."
  49     echo "Disabling this configure test will create a broken Libav."
  50     if test "$BASH_VERSION" = '2.04.0(1)-release'; then
  51         echo "This bash version ($BASH_VERSION) is broken on your platform."
  52         echo "Upgrade to a later version if available."
  53     fi
  54     exit 1
  55 fi
  56
  57 test -d /usr/xpg4/bin && PATH=/usr/xpg4/bin:$PATH
  58
  59 show_help(){
  60     cat <<EOF
  61 Usage: configure [options]
  62 Options: [defaults in brackets after descriptions]
  63
  64 Help options:
  65   --help                   print this message
  66   --quiet                  Suppress showing informative output
  67   --list-decoders          show all available decoders
  68   --list-encoders          show all available encoders
  69   --list-hwaccels          show all available hardware accelerators
  70   --list-demuxers          show all available demuxers
  71   --list-muxers            show all available muxers
  72   --list-parsers           show all available parsers
  73   --list-protocols         show all available protocols
  74   --list-bsfs              show all available bitstream filters
  75   --list-indevs            show all available input devices
  76   --list-outdevs           show all available output devices
  77   --list-filters           show all available filters
  78
  79 Standard options:
  80   --logfile=FILE           log tests and output to FILE [avbuild/config.log]
  81   --disable-logging        do not log configure debug information
  82   --prefix=PREFIX          install in PREFIX [$prefix_default]
  83   --bindir=DIR             install binaries in DIR [PREFIX/bin]
  84   --datadir=DIR            install data files in DIR [PREFIX/share/avconv]
  85   --docdir=DIR             install documentation in DIR [PREFIX/share/doc/libav]
  86   --libdir=DIR             install libs in DIR [PREFIX/lib]
  87   --shlibdir=DIR           install shared libs in DIR [PREFIX/lib]
  88   --incdir=DIR             install includes in DIR [PREFIX/include]
  89   --mandir=DIR             install man page in DIR [PREFIX/share/man]
  90   --enable-rpath           use rpath when linking programs (USE WITH CARE)
  91
  92 Licensing options:
  93   --enable-gpl             allow use of GPL code, the resulting libs
  94                            and binaries will be under GPL [no]
  95   --enable-version3        upgrade (L)GPL to version 3 [no]
  96   --enable-nonfree         allow use of nonfree code, the resulting libs
  97                            and binaries will be unredistributable [no]
  98
  99 Configuration options:
 100   --disable-static         do not build static libraries [no]
 101   --enable-shared          build shared libraries [no]
 102   --enable-small           optimize for size instead of speed
 103   --enable-runtime-cpudetect detect CPU capabilities at runtime (bigger binary)
 104   --enable-gray            enable full grayscale support (slower color)
 105   --disable-swscale-alpha  disable alpha channel support in swscale
 106   --disable-all            disable building components, libraries and programs
 107
 108 Program options:
 109   --disable-programs       do not build command line programs
 110   --disable-avconv         disable avconv build
 111   --disable-avplay         disable avplay build
 112   --disable-avprobe        disable avprobe build
 113   --disable-avserver       deprecated, does nothing
 114
 115 Component options:
 116   --disable-doc            do not build documentation
 117   --disable-pod2man        do not build manual pages
 118   --disable-texi2html      do not build HTML documentation
 119   --disable-avdevice       disable libavdevice build
 120   --disable-avcodec        disable libavcodec build
 121   --disable-avformat       disable libavformat build
 122   --disable-avutil         disable libavutil build
 123   --disable-swscale        disable libswscale build
 124   --disable-avfilter       disable video filter support [no]
 125   --disable-avresample     disable libavresample build [no]
 126   --disable-pthreads       disable pthreads [auto]
 127   --disable-w32threads     disable Win32 threads [auto]
 128   --disable-network        disable network support [no]
 129   --disable-dct            disable DCT code
 130   --disable-error-resilience disable error resilience code
 131   --disable-lsp            disable LSP code
 132   --disable-lzo            disable LZO decoder code
 133   --disable-mdct           disable MDCT code
 134   --disable-rdft           disable RDFT code
 135   --disable-fft            disable FFT code
 136   --disable-faan           disable floating point AAN (I)DCT code
 137
 138 Individual component options:
 139   --disable-everything     disable all components listed below
 140   --disable-encoder=NAME   disable encoder NAME
 141   --enable-encoder=NAME    enable encoder NAME
 142   --disable-encoders       disable all encoders
 143   --disable-decoder=NAME   disable decoder NAME
 144   --enable-decoder=NAME    enable decoder NAME
 145   --disable-decoders       disable all decoders
 146   --disable-hwaccel=NAME   disable hwaccel NAME
 147   --enable-hwaccel=NAME    enable hwaccel NAME
 148   --disable-hwaccels       disable all hwaccels
 149   --disable-muxer=NAME     disable muxer NAME
 150   --enable-muxer=NAME      enable muxer NAME
 151   --disable-muxers         disable all muxers
 152   --disable-demuxer=NAME   disable demuxer NAME
 153   --enable-demuxer=NAME    enable demuxer NAME
 154   --disable-demuxers       disable all demuxers
 155   --enable-parser=NAME     enable parser NAME
 156   --disable-parser=NAME    disable parser NAME
 157   --disable-parsers        disable all parsers
 158   --enable-bsf=NAME        enable bitstream filter NAME
 159   --disable-bsf=NAME       disable bitstream filter NAME
 160   --disable-bsfs           disable all bitstream filters
 161   --enable-protocol=NAME   enable protocol NAME
 162   --disable-protocol=NAME  disable protocol NAME
 163   --disable-protocols      disable all protocols
 164   --enable-indev=NAME      enable input device NAME
 165   --disable-indev=NAME     disable input device NAME
 166   --disable-indevs         disable input devices
 167   --enable-outdev=NAME     enable output device NAME
 168   --disable-outdev=NAME    disable output device NAME
 169   --disable-outdevs        disable output devices
 170   --disable-devices        disable all devices
 171   --enable-filter=NAME     enable filter NAME
 172   --disable-filter=NAME    disable filter NAME
 173   --disable-filters        disable all filters
 174
 175 External library support:
 176
 177   Using any of the following switches will allow Libav to link to the
 178   corresponding external library. All the components depending on that library
 179   will become enabled, if all their other dependencies are met and they are not
 180   explicitly disabled. E.g. --enable-libwavpack will enable linking to
 181   libwavpack and allow the libwavpack encoder to be built, unless it is
 182   specifically disabled with --disable-encoder=libwavpack.
 183
 184   Note that only the system libraries are auto-detected. All the other external
 185   libraries must be explicitly enabled.
 186
 187   Also note that the following help text describes the purpose of the libraries
 188   themselves, not all their features will necessarily be usable by Libav.
 189
 190   --enable-avisynth          video frameserver
 191   --enable-avxsynth          Linux version of AviSynth
 192   --enable-bzlib             bzip2 compression [autodetect]
 193   --enable-frei0r            video filtering plugins
 194   --enable-gnutls            crypto
 195   --enable-libbs2b           Bauer stereophonic-to-binaural DSP
 196   --enable-libcdio           audio CD input
 197   --enable-libdc1394         IEEE 1394/Firewire camera input
 198   --enable-libdcadec         DCA audio decoding
 199   --enable-libfaac           AAC audio encoding
 200   --enable-libfdk-aac        AAC audio encoding/decoding
 201   --enable-libfontconfig     font configuration and management
 202   --enable-libfreetype       font rendering
 203   --enable-libgsm            GSM audio encoding/decoding
 204   --enable-libhdcd           HDCD decoding filter
 205   --enable-libilbc           ILBC audio encoding/decoding
 206   --enable-libjack           JACK audio sound server
 207   --enable-libkvazaar        HEVC video encoding
 208   --enable-libmp3lame        MP3 audio encoding
 209   --enable-libopencore-amrnb AMR-NB audio encoding/decoding
 210   --enable-libopencore-amrwb AMR-WB audio decoding
 211   --enable-libopencv         computer vision
 212   --enable-libopenh264       H.264 video encoding/decoding
 213   --enable-libopenjpeg       JPEG 2000 image encoding/decoding
 214   --enable-libopus           Opus audio encoding/decoding
 215   --enable-libpulse          Pulseaudio sound server
 216   --enable-librtmp           RTMP streaming
 217   --enable-libschroedinger   Dirac video encoding/decoding
 218   --enable-libsnappy         snappy compression
 219   --enable-libspeex          Speex audio encoding/decoding
 220   --enable-libtheora         Theora video encoding/decoding
 221   --enable-libtwolame        MP2 audio encoding
 222   --enable-libvo-aacenc      AAC audio encoding
 223   --enable-libvo-amrwbenc    AMR-WB audio encoding
 224   --enable-libvorbis         Vorbis audio encoding/decoding
 225   --enable-libvpx            VP* video encoding/decoding
 226   --enable-libwavpack        Wavpack audio encoding/decoding
 227   --enable-libwebp           WebP image encoding/decoding
 228   --enable-libx264           H.264 video encoding
 229   --enable-libx265           HEVC video encoding
 230   --enable-libxavs           Chinese AVS video encoding
 231   --enable-libxcb            X window system protocol communication
 232   --enable-libxcb-shm        X11 shm communication [auto]
 233   --enable-libxcb-xfixes     X11 mouse rendering [auto]
 234   --enable-libxvid           MPEG-4 ASP video encoding
 235   --enable-openssl           crypto
 236   --enable-zlib              compression [autodetect]
 237
 238   The following libraries provide various hardware acceleration features:
 239   --enable-cuda    Nvidia CUDA (dynamically linked)
 240   --enable-cuvid   Nvidia CUVID video decode acceleration
 241   --enable-d3d11va Microsoft Direct3D 11 video acceleration [auto]
 242   --enable-dxva2   Microsoft DirectX 9 video acceleration [auto]
 243   --enable-libmfx  Intel MediaSDK (AKA Quick Sync Video)
 244   --enable-libnpp  Nvidia CUDA processing
 245   --enable-mmal    Broadcom Multi-Media Abstraction Layer (Raspberry Pi)
 246   --enable-nvenc   Nvidia video encoding
 247   --enable-omx     OpenMAX IL
 248   --enable-omx-rpi OpenMAX IL for Raspberry Pi
 249   --enable-vaapi   Video Acceleration API (mainly Unix/Intel)
 250   --enable-vda     Apple Video Decode Acceleration [auto]
 251   --enable-vdpau   Nvidia Video Decode and Presentation API for Unix [auto]
 252
 253 Toolchain options:
 254   --arch=ARCH              select architecture [$arch]
 255   --cpu=CPU                select the minimum required CPU (affects
 256                            instruction selection, may crash on older CPUs)
 257   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
 258   --enable-cross-compile   assume a cross-compiler is used
 259   --sysroot=PATH           root of cross-build tree
 260   --sysinclude=PATH        location of cross-build system headers
 261   --target-os=OS           compiler targets OS [$target_os]
 262   --target-exec=CMD        command to run executables on target
 263   --target-path=DIR        path to view of build directory on target
 264   --target-samples=DIR     path to samples directory on target
 265   --toolchain=NAME         set tool defaults according to NAME
 266   --nm=NM                  use nm tool
 267   --ar=AR                  use archive tool AR [$ar_default]
 268   --as=AS                  use assembler AS [$as_default]
 269   --cc=CC                  use C compiler CC [$cc_default]
 270   --objcc=OCC              use ObjC compiler OCC [$cc_default]
 271   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
 272   --ld=LD                  use linker LD
 273   --x86asmexe=X86ASM       use x86 assembler X86ASM
 274   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
 275   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
 276   --host-cc=HOSTCC         use host C compiler HOSTCC
 277   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
 278   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
 279   --host-ld=HOSTLD         use host linker HOSTLD
 280   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
 281   --host-libs=HLIBS        use libs HLIBS when linking for host
 282   --host-os=OS             compiler host OS [$target_os]
 283   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
 284   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
 285   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
 286   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
 287   --extra-ldsoflags=ELDFLAGS add ELDFLAGS to LDSOFLAGS [$LDSOFLAGS]
 288   --extra-libs=ELIBS       add ELIBS [$ELIBS]
 289   --extra-version=STRING   version string suffix []
 290   --optflags=OPTFLAGS      override optimization-related compiler flags
 291   --enable-pic             build position-independent code
 292   --enable-thumb           compile for Thumb instruction set
 293   --enable-lto             use link-time optimization
 294   --env="ENV=override"     override the environment variables
 295
 296 Advanced options (experts only):
 297   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
 298   --custom-allocator=NAME  use a supported custom allocator
 299   --disable-symver         disable symbol versioning
 300   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
 301   --disable-safe-bitstream-reader
 302                            disable buffer boundary checking in bitreaders
 303                            (faster, but may crash)
 304   --enable-sram            allow use of on-chip SRAM
 305
 306 Optimization options (experts only):
 307   --disable-asm            disable all assembly optimizations
 308   --disable-altivec        disable AltiVec optimizations
 309   --disable-vsx            disable VSX optimizations
 310   --disable-power8         disable POWER8 optimizations
 311   --disable-amd3dnow       disable 3DNow! optimizations
 312   --disable-amd3dnowext    disable 3DNow! extended optimizations
 313   --disable-mmx            disable MMX optimizations
 314   --disable-mmxext         disable MMXEXT optimizations
 315   --disable-sse            disable SSE optimizations
 316   --disable-sse2           disable SSE2 optimizations
 317   --disable-sse3           disable SSE3 optimizations
 318   --disable-ssse3          disable SSSE3 optimizations
 319   --disable-sse4           disable SSE4 optimizations
 320   --disable-sse42          disable SSE4.2 optimizations
 321   --disable-avx            disable AVX optimizations
 322   --disable-xop            disable XOP optimizations
 323   --disable-fma3           disable FMA3 optimizations
 324   --disable-fma4           disable FMA4 optimizations
 325   --disable-avx2           disable AVX2 optimizations
 326   --disable-armv5te        disable armv5te optimizations
 327   --disable-armv6          disable armv6 optimizations
 328   --disable-armv6t2        disable armv6t2 optimizations
 329   --disable-vfp            disable VFP optimizations
 330   --disable-neon           disable NEON optimizations
 331   --disable-inline-asm     disable use of inline assembly
 332   --disable-x86asm         disable use of standalone x86 assembly
 333
 334 Developer options (useful when working on Libav itself):
 335   --disable-debug          disable debugging symbols
 336   --enable-debug=LEVEL     set the debug level [$debuglevel]
 337   --disable-optimizations  disable compiler optimizations
 338   --enable-extra-warnings  enable more compiler warnings
 339   --samples=PATH           location of test samples for FATE, if not set use
 340                            \$LIBAV_SAMPLES at make invocation time.
 341   --enable-neon-clobber-test check NEON registers for clobbering (should be
 342                            used only for debugging purposes)
 343   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
 344                            should be used only for debugging purposes)
 345   --enable-random          randomly enable/disable components
 346   --disable-random
 347   --enable-random=LIST     randomly enable/disable specific components or
 348   --disable-random=LIST    component groups. LIST is a comma-separated list
 349                            of NAME[:PROB] entries where NAME is a component
 350                            (group) and PROB the probability associated with
 351                            NAME (default 0.5).
 352   --random-seed=VALUE      seed value for --enable/disable-random
 353   --disable-valgrind-backtrace do not print a backtrace under Valgrind
 354                            (only applies to --disable-optimizations builds)
 355   --ignore-tests=TESTS     comma-separated list (without "fate-" prefix
 356                            in the name) of tests whose result is ignored
 357
 358 NOTE: Object files are built at the place where configure is launched.
 359 EOF
 360   exit 0
 361 }
 362
 363 quotes='""'
 364
 365 log(){
 366     echo "$@" >> $logfile
 367 }
 368
 369 log_file(){
 370     log BEGIN $1
 371     i=1
 372     while read line; do
 373         printf '%5s   %s\n' "${i}" "${line}"
 374         i=$(($i+1))
 375     done < $1 >> $logfile
 376     log END $1
 377 }
 378
 379 echolog(){
 380     log "$@"
 381     echo "$@"
 382 }
 383
 384 warn(){
 385     log "WARNING: $*"
 386     WARNINGS="${WARNINGS}WARNING: $*\n"
 387 }
 388
 389 die(){
 390     echolog "$@"
 391     cat <<EOF
 392
 393 If you think configure made a mistake, make sure you are using the latest
 394 version from Git.  If the latest version fails, report the problem to the
 395 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
 396 EOF
 397     if disabled logging; then
 398         cat <<EOF
 399 Rerun configure with logging enabled (do not use --disable-logging), and
 400 include the log this produces with your report.
 401 EOF
 402     else
 403         cat <<EOF
 404 Include the log file "$logfile" produced by configure as this will help
 405 solving the problem.
 406 EOF
 407     fi
 408     exit 1
 409 }
 410
 411 # Avoid locale weirdness, besides we really just want to translate ASCII.
 412 toupper(){
 413     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
 414 }
 415
 416 tolower(){
 417     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
 418 }
 419
 420 c_escape(){
 421     echo "$*" | sed 's/["\\]/\\\0/g'
 422 }
 423
 424 sh_quote(){
 425     v=$(echo "$1" | sed "s/'/'\\\\''/g")
 426     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
 427     echo "$v"
 428 }
 429
 430 cleanws(){
 431     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
 432 }
 433
 434 filter(){
 435     pat=$1
 436     shift
 437     for v; do
 438         eval "case '$v' in $pat) printf '%s ' '$v' ;; esac"
 439     done
 440 }
 441
 442 filter_out(){
 443     pat=$1
 444     shift
 445     for v; do
 446         eval "case '$v' in $pat) ;; *) printf '%s ' '$v' ;; esac"
 447     done
 448 }
 449
 450 map(){
 451     m=$1
 452     shift
 453     for v; do eval $m; done
 454 }
 455
 456 add_suffix(){
 457     suffix=$1
 458     shift
 459     for v; do echo ${v}${suffix}; done
 460 }
 461
 462 set_all(){
 463     value=$1
 464     shift
 465     for var in $*; do
 466         eval $var=$value
 467     done
 468 }
 469
 470 set_weak(){
 471     value=$1
 472     shift
 473     for var; do
 474         eval : \${$var:=$value}
 475     done
 476 }
 477
 478 sanitize_var_name(){
 479     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
 480 }
 481
 482 set_sanitized(){
 483     var=$1
 484     shift
 485     eval $(sanitize_var_name "$var")='$*'
 486 }
 487
 488 get_sanitized(){
 489     eval echo \$$(sanitize_var_name "$1")
 490 }
 491
 492 pushvar(){
 493     for pvar in $*; do
 494         eval level=\${${pvar}_level:=0}
 495         eval ${pvar}_${level}="\$$pvar"
 496         eval ${pvar}_level=$(($level+1))
 497     done
 498 }
 499
 500 popvar(){
 501     for pvar in $*; do
 502         eval level=\${${pvar}_level:-0}
 503         test $level = 0 && continue
 504         eval level=$(($level-1))
 505         eval $pvar="\${${pvar}_${level}}"
 506         eval ${pvar}_level=$level
 507         eval unset ${pvar}_${level}
 508     done
 509 }
 510
 511 enable(){
 512     set_all yes $*
 513 }
 514
 515 disable(){
 516     set_all no $*
 517 }
 518
 519 enable_weak(){
 520     set_weak yes $*
 521 }
 522
 523 disable_weak(){
 524     set_weak no $*
 525 }
 526
 527 enable_sanitized(){
 528     for var; do
 529         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
 530     done
 531 }
 532
 533 disable_sanitized(){
 534     for var; do
 535         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
 536     done
 537 }
 538
 539 do_enable_deep(){
 540     for var; do
 541         enabled $var && continue
 542         eval sel="\$${var}_select"
 543         eval sgs="\$${var}_suggest"
 544         pushvar var sgs
 545         enable_deep $sel
 546         popvar sgs
 547         enable_deep_weak $sgs
 548         popvar var
 549     done
 550 }
 551
 552 enable_deep(){
 553     do_enable_deep $*
 554     enable $*
 555 }
 556
 557 enable_deep_weak(){
 558     for var; do
 559         disabled $var && continue
 560         pushvar var
 561         do_enable_deep $var
 562         popvar var
 563         enable_weak $var
 564     done
 565 }
 566
 567 enabled(){
 568     test "${1#!}" = "$1" && op== || op=!=
 569     eval test "x\$${1#!}" $op "xyes"
 570 }
 571
 572 disabled(){
 573     test "${1#!}" = "$1" && op== || op=!=
 574     eval test "x\$${1#!}" $op "xno"
 575 }
 576
 577 enabled_all(){
 578     for opt; do
 579         enabled $opt || return 1
 580     done
 581 }
 582
 583 disabled_all(){
 584     for opt; do
 585         disabled $opt || return 1
 586     done
 587 }
 588
 589 enabled_any(){
 590     for opt; do
 591         enabled $opt && return 0
 592     done
 593 }
 594
 595 disabled_any(){
 596     for opt; do
 597         disabled $opt && return 0
 598     done
 599     return 1
 600 }
 601
 602 set_default(){
 603     for opt; do
 604         eval : \${$opt:=\$${opt}_default}
 605     done
 606 }
 607
 608 is_in(){
 609     value=$1
 610     shift
 611     for var in $*; do
 612         [ $var = $value ] && return 0
 613     done
 614     return 1
 615 }
 616
 617 check_deps(){
 618     for cfg; do
 619         enabled ${cfg}_checking && die "Circular dependency for $cfg."
 620         disabled ${cfg}_checking && continue
 621         enable ${cfg}_checking
 622
 623         eval dep_all="\$${cfg}_deps"
 624         eval dep_any="\$${cfg}_deps_any"
 625         eval dep_con="\$${cfg}_conflict"
 626         eval dep_sel="\$${cfg}_select"
 627         eval dep_sgs="\$${cfg}_suggest"
 628         eval dep_ifa="\$${cfg}_if"
 629         eval dep_ifn="\$${cfg}_if_any"
 630
 631         pushvar cfg dep_all dep_any dep_con dep_sel dep_sgs dep_ifa dep_ifn
 632         check_deps $dep_all $dep_any $dep_con $dep_sel $dep_sgs $dep_ifa $dep_ifn
 633         popvar cfg dep_all dep_any dep_con dep_sel dep_sgs dep_ifa dep_ifn
 634
 635         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
 636         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
 637         enabled_all  $dep_all || disable $cfg
 638         enabled_any  $dep_any || disable $cfg
 639         disabled_all $dep_con || disable $cfg
 640         disabled_any $dep_sel && disable $cfg
 641
 642         enabled $cfg && enable_deep_weak $dep_sel $dep_sgs
 643
 644         for dep in $dep_all $dep_any $dep_sel $dep_sgs; do
 645             # filter out library deps, these do not belong in extralibs
 646             is_in $dep $LIBRARY_LIST && continue
 647             enabled $dep && eval append ${cfg}_extralibs ${dep}_extralibs
 648         done
 649
 650         disable ${cfg}_checking
 651     done
 652 }
 653
 654 print_config(){
 655     pfx=$1
 656     files=$2
 657     shift 2
 658     map 'eval echo "$v \${$v:-no}"' "$@" |
 659     awk "BEGIN { split(\"$files\", files) }
 660         {
 661             c = \"$pfx\" toupper(\$1);
 662             v = \$2;
 663             sub(/yes/, 1, v);
 664             sub(/no/,  0, v);
 665             for (f in files) {
 666                 file = files[f];
 667                 if (file ~ /\\.h\$/) {
 668                     printf(\"#define %s %d\\n\", c, v) >>file;
 669                 } else if (file ~ /\\.asm\$/) {
 670                     printf(\"%%define %s %d\\n\", c, v) >>file;
 671                 } else if (file ~ /\\.mak\$/) {
 672                     n = -v ? \"\" : \"!\";
 673                     printf(\"%s%s=yes\\n\", n, c) >>file;
 674                 }
 675             }
 676         }"
 677 }
 678
 679 print_enabled(){
 680     suf=$1
 681     shift
 682     for v; do
 683         enabled $v && printf "%s\n" ${v%$suf}
 684     done
 685 }
 686
 687 append(){
 688     var=$1
 689     shift
 690     eval "$var=\"\$$var $*\""
 691 }
 692
 693 prepend(){
 694     var=$1
 695     shift
 696     eval "$var=\"$* \$$var\""
 697 }
 698
 699 unique(){
 700     var=$1
 701     uniq_list=""
 702     for tok in $(eval echo \$$var); do
 703         uniq_list="$(filter_out $tok $uniq_list) $tok"
 704     done
 705     eval "$var=\"${uniq_list}\""
 706 }
 707
 708 resolve(){
 709     var=$1
 710     tmpvar=
 711     for entry in $(eval echo \$$var); do
 712         tmpvar="$tmpvar $(eval echo \$${entry})"
 713     done
 714     eval "$var=\"${tmpvar}\""
 715 }
 716
 717 add_cppflags(){
 718     append CPPFLAGS "$@"
 719 }
 720
 721 add_cflags(){
 722     append CFLAGS $($cflags_filter "$@")
 723 }
 724
 725 add_cflags_headers(){
 726     append CFLAGS_HEADERS $($cflags_filter "$@")
 727 }
 728
 729 add_asflags(){
 730     append ASFLAGS $($asflags_filter "$@")
 731 }
 732
 733 add_objcflags(){
 734     append OBJCFLAGS $($objcflags_filter "$@")
 735 }
 736
 737 add_ldflags(){
 738     append LDFLAGS $($ldflags_filter "$@")
 739 }
 740
 741 add_ldexeflags(){
 742     append LDEXEFLAGS $($ldflags_filter "$@")
 743 }
 744
 745 add_ldsoflags(){
 746     append LDSOFLAGS $($ldflags_filter "$@")
 747 }
 748
 749 add_stripflags(){
 750     append STRIPFLAGS "$@"
 751 }
 752
 753 add_extralibs(){
 754     prepend extralibs $($ldflags_filter "$@")
 755 }
 756
 757 add_host_cppflags(){
 758     append host_cppflags "$@"
 759 }
 760
 761 add_host_cflags(){
 762     append host_cflags $($host_cflags_filter "$@")
 763 }
 764
 765 add_host_ldflags(){
 766     append host_ldflags $($host_ldflags_filter "$@")
 767 }
 768
 769 add_compat(){
 770     append compat_objs $1
 771     shift
 772     map 'add_cppflags -D$v' "$@"
 773 }
 774
 775 check_cmd(){
 776     log "$@"
 777     "$@" >> $logfile 2>&1
 778 }
 779
 780 cc_o(){
 781     eval printf '%s\\n' $CC_O
 782 }
 783
 784 cc_e(){
 785     eval printf '%s\\n' $CC_E
 786 }
 787
 788 check_cc(){
 789     log check_cc "$@"
 790     cat > $TMPC
 791     log_file $TMPC
 792     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
 793 }
 794
 795 check_objcc(){
 796     log check_objcc "$@"
 797     cat > $TMPC
 798     log_file $TMPC
 799     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
 800 }
 801
 802 check_cpp(){
 803     log check_cpp "$@"
 804     cat > $TMPC
 805     log_file $TMPC
 806     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
 807 }
 808
 809 as_o(){
 810     eval printf '%s\\n' $AS_O
 811 }
 812
 813 check_as(){
 814     log check_as "$@"
 815     cat > $TMPS
 816     log_file $TMPS
 817     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
 818 }
 819
 820 check_inline_asm(){
 821     log check_inline_asm "$@"
 822     name="$1"
 823     code="$2"
 824     shift 2
 825     disable $name
 826     check_cc "$@" <<EOF && enable $name
 827 void foo(void){ __asm__ volatile($code); }
 828 EOF
 829 }
 830
 831 check_insn(){
 832     log check_insn "$@"
 833     check_inline_asm ${1}_inline "\"$2\""
 834     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
 835 }
 836
 837 check_x86asm(){
 838     log check_x86asm "$@"
 839     echo "$1" > $TMPS
 840     log_file $TMPS
 841     shift 1
 842     check_cmd $x86asmexe $X86ASMFLAGS "$@" -o $TMPO $TMPS
 843 }
 844
 845 ld_o(){
 846     eval printf '%s\\n' $LD_O
 847 }
 848
 849 check_ld(){
 850     log check_ld "$@"
 851     flags=$(filter_out '-l*' "$@")
 852     libs=$(filter '-l*' "$@")
 853     check_cc $($cflags_filter $flags) || return
 854     flags=$($ldflags_filter $flags)
 855     libs=$($ldflags_filter $libs)
 856     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
 857 }
 858
 859 print_include(){
 860     hdr=$1
 861     test "${hdr%.h}" = "${hdr}" &&
 862         echo "#include $hdr"    ||
 863         echo "#include <$hdr>"
 864 }
 865
 866 check_code(){
 867     log check_code "$@"
 868     check=$1
 869     headers=$2
 870     code=$3
 871     shift 3
 872     {
 873         for hdr in $headers; do
 874             print_include $hdr
 875         done
 876         echo "int main(void) { $code; return 0; }"
 877     } | check_$check "$@"
 878 }
 879
 880 check_cppflags(){
 881     log check_cppflags "$@"
 882     check_cpp "$@" <<EOF && append CPPFLAGS "$@"
 883 #include <stdlib.h>;
 884 EOF
 885 }
 886
 887 test_cflags(){
 888     log test_cflags "$@"
 889     set -- $($cflags_filter "$@")
 890     check_cc "$@" <<EOF
 891 int x;
 892 EOF
 893 }
 894
 895 check_cflags(){
 896     log check_cflags "$@"
 897     test_cflags "$@" && add_cflags "$@"
 898 }
 899
 900 test_objcflags(){
 901     log test_objcflags "$@"
 902     set -- $($objcflags_filter "$@")
 903     check_objcc "$@" <<EOF
 904 int x;
 905 EOF
 906 }
 907
 908 check_objcflags(){
 909     log check_objcflags "$@"
 910     test_objcflags "$@" && add_objcflags "$@"
 911 }
 912
 913 test_ldflags(){
 914     log test_ldflags "$@"
 915     check_ld "$@" <<EOF
 916 int main(void){ return 0; }
 917 EOF
 918 }
 919
 920 check_ldflags(){
 921     log check_ldflags "$@"
 922     test_ldflags "$@" && add_ldflags "$@"
 923 }
 924
 925 test_stripflags(){
 926     log test_stripflags "$@"
 927     # call check_cc to get a fresh TMPO
 928     check_cc <<EOF
 929 int main(void) { return 0; }
 930 EOF
 931     check_cmd $strip $STRIPFLAGS "$@" $TMPO
 932 }
 933
 934 check_stripflags(){
 935     log check_stripflags "$@"
 936     test_stripflags "$@" && add_stripflags "$@"
 937 }
 938
 939 check_header(){
 940     log check_header "$@"
 941     header=$1
 942     shift
 943     disable_sanitized $header
 944     check_cpp "$@" <<EOF && enable_sanitized $header
 945 #include <$header>
 946 int x;
 947 EOF
 948 }
 949
 950 check_func(){
 951     log check_func "$@"
 952     func=$1
 953     shift
 954     disable $func
 955     check_ld "$@" <<EOF && enable $func
 956 extern int $func();
 957 int main(void){ $func(); }
 958 EOF
 959 }
 960
 961 check_mathfunc(){
 962     log check_mathfunc "$@"
 963     func=$1
 964     narg=$2
 965     shift 2
 966     test $narg = 2 && args="f, g" || args="f"
 967     disable $func
 968     check_ld "$@" <<EOF && enable $func
 969 #include <math.h>
 970 float foo(float f, float g) { return $func($args); }
 971 int main(void){ return 0; }
 972 EOF
 973 }
 974
 975 check_func_headers(){
 976     log check_func_headers "$@"
 977     headers=$1
 978     funcs=$2
 979     shift 2
 980     {
 981         for hdr in $headers; do
 982             print_include $hdr
 983         done
 984         for func in $funcs; do
 985             echo "long check_$func(void) { return (long) $func; }"
 986         done
 987         echo "int main(void) { return 0; }"
 988     } | check_ld "$@" && enable $funcs && enable_sanitized $headers
 989 }
 990
 991 check_cpp_condition(){
 992     log check_cpp_condition "$@"
 993     header=$1
 994     condition=$2
 995     shift 2
 996     check_cpp "$@" <<EOF
 997 #include <$header>
 998 #if !($condition)
 999 #error "unsatisfied condition: $condition"
1000 #endif
1001 EOF
1002 }
1003
1004 test_cflags_cpp(){
1005     log test_cflags_cpp "$@"
1006     flags=$1
1007     condition=$2
1008     shift 2
1009     set -- $($cflags_filter "$flags")
1010     check_cpp "$@" <<EOF
1011 #if !($condition)
1012 #error "unsatisfied condition: $condition"
1013 #endif
1014 EOF
1015 }
1016
1017 check_lib(){
1018     log check_lib "$@"
1019     name="$1"
1020     headers="$2"
1021     funcs="$3"
1022     shift 3
1023     disable $name
1024     check_func_headers "$headers" "$funcs" "$@" &&
1025         enable $name && eval ${name}_extralibs="\$@"
1026 }
1027
1028 check_pkg_config(){
1029     log check_pkg_config "$@"
1030     name="$1"
1031     pkg_version="$2"
1032     pkg="${2%% *}"
1033     headers="$3"
1034     funcs="$4"
1035     shift 4
1036     disable $name
1037     check_cmd $pkg_config --exists --print-errors $pkg_version || return
1038     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1039     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1040     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1041         enable $name &&
1042         add_cflags    "$pkg_cflags" &&
1043         eval $(sanitize_var_name ${name}_extralibs)="\$pkg_libs"
1044 }
1045
1046 check_exec(){
1047     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1048 }
1049
1050 check_exec_crash(){
1051     log check_exec_crash "$@"
1052     code=$(cat)
1053
1054     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1055     # are safe but may not be available everywhere.  Thus we use
1056     # raise(SIGTERM) instead.  The check is run in a subshell so we
1057     # can redirect the "Terminated" message from the shell.  SIGBUS
1058     # is not defined by standard C so it is used conditionally.
1059
1060     (check_exec "$@") >> $logfile 2>&1 <<EOF
1061 #include <signal.h>
1062 static void sighandler(int sig){
1063     raise(SIGTERM);
1064 }
1065 int foo(void){
1066     $code
1067 }
1068 int (*func_ptr)(void) = foo;
1069 int main(void){
1070     signal(SIGILL, sighandler);
1071     signal(SIGFPE, sighandler);
1072     signal(SIGSEGV, sighandler);
1073 #ifdef SIGBUS
1074     signal(SIGBUS, sighandler);
1075 #endif
1076     return func_ptr();
1077 }
1078 EOF
1079 }
1080
1081 check_type(){
1082     log check_type "$@"
1083     headers=$1
1084     type=$2
1085     shift 2
1086     disable_sanitized "$type"
1087     check_code cc "$headers" "$type v" "$@" && enable_sanitized "$type"
1088 }
1089
1090 check_struct(){
1091     log check_struct "$@"
1092     headers=$1
1093     struct=$2
1094     member=$3
1095     shift 3
1096     disable_sanitized "${struct}_${member}"
1097     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1098         enable_sanitized "${struct}_${member}"
1099 }
1100
1101 check_builtin(){
1102     log check_builtin "$@"
1103     name=$1
1104     headers=$2
1105     builtin=$3
1106     shift 3
1107     disable "$name"
1108     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1109 }
1110
1111 check_compile_assert(){
1112     log check_compile_assert "$@"
1113     name=$1
1114     headers=$2
1115     condition=$3
1116     shift 3
1117     disable "$name"
1118     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1119 }
1120
1121 require(){
1122     log require "$@"
1123     name_version="$1"
1124     name="${1%% *}"
1125     headers="$2"
1126     func="$3"
1127     shift 3
1128     check_lib $name "$headers" $func "$@" || die "ERROR: $name_version not found"
1129 }
1130
1131 require_header(){
1132     log require "$@"
1133     header="$1"
1134     shift
1135     check_header "$header" "$@" || die "ERROR: $header not found"
1136 }
1137
1138 require_cpp_condition(){
1139     log require "$@"
1140     header="$1"
1141     condition="$2"
1142     shift 2
1143     check_cpp_condition "$header" "$condition" "$@" || die "ERROR: $condition not satisfied"
1144 }
1145
1146 require_pkg_config(){
1147     log require_pkg_config "$@"
1148     pkg_version="$2"
1149     check_pkg_config "$@" || die "ERROR: $pkg_version not found"
1150 }
1151
1152 hostcc_e(){
1153     eval printf '%s\\n' $HOSTCC_E
1154 }
1155
1156 hostcc_o(){
1157     eval printf '%s\\n' $HOSTCC_O
1158 }
1159
1160 check_host_cc(){
1161     log check_host_cc "$@"
1162     cat > $TMPC
1163     log_file $TMPC
1164     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1165 }
1166
1167 check_host_cpp(){
1168     log check_host_cpp "$@"
1169     cat > $TMPC
1170     log_file $TMPC
1171     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1172 }
1173
1174 check_host_cppflags(){
1175     log check_host_cppflags "$@"
1176     check_host_cpp "$@" <<EOF && append host_cppflags "$@"
1177 #include <stdlib.h>;
1178 EOF
1179 }
1180
1181 check_host_cflags(){
1182     log check_host_cflags "$@"
1183     set -- $($host_cflags_filter "$@")
1184     check_host_cc "$@" <<EOF && append host_cflags "$@"
1185 int x;
1186 EOF
1187 }
1188
1189 check_host_cpp_condition(){
1190     log check_host_cpp_condition "$@"
1191     header=$1
1192     condition=$2
1193     shift 2
1194     check_host_cpp "$@" <<EOF
1195 #include <$header>
1196 #if !($condition)
1197 #error "unsatisfied condition: $condition"
1198 #endif
1199 EOF
1200 }
1201
1202 apply(){
1203     file=$1
1204     shift
1205     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1206 }
1207
1208 cp_if_changed(){
1209     cmp -s "$1" "$2" && { test "$quiet" != "yes" && echo "$2 is unchanged"; } && return
1210     mkdir -p "$(dirname $2)"
1211     cp -f "$1" "$2"
1212 }
1213
1214 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1215 # system-dependent things.
1216
1217 AVCODEC_COMPONENTS="
1218     bsfs
1219     decoders
1220     encoders
1221     hwaccels
1222     parsers
1223 "
1224
1225 AVDEVICE_COMPONENTS="
1226     indevs
1227     outdevs
1228 "
1229 AVFILTER_COMPONENTS="
1230     filters
1231 "
1232 AVFORMAT_COMPONENTS="
1233     demuxers
1234     muxers
1235     protocols
1236 "
1237
1238 AVRESAMPLE_COMPONENTS=""
1239 AVUTIL_COMPONENTS=""
1240
1241 COMPONENT_LIST="
1242     $AVCODEC_COMPONENTS
1243     $AVDEVICE_COMPONENTS
1244     $AVFILTER_COMPONENTS
1245     $AVFORMAT_COMPONENTS
1246     $AVRESAMPLE_COMPONENTS
1247     $AVUTIL_COMPONENTS
1248 "
1249
1250 EXAMPLE_LIST="
1251     decode_audio_example
1252     decode_video_example
1253     encode_audio_example
1254     encode_video_example
1255     filter_audio_example
1256     metadata_example
1257     output_example
1258     qsvdec_example
1259     transcode_aac_example
1260 "
1261
1262 # catchall list of things that require external libs to link
1263 EXTRALIBS_LIST="
1264     cpu_init
1265     cws2fws
1266 "
1267
1268 HWACCEL_LIBRARY_NONFREE_LIST="
1269     cuda
1270     cuvid
1271     libnpp
1272 "
1273 HWACCEL_LIBRARY_LIST="
1274     $HWACCEL_LIBRARY_NONFREE_LIST
1275     d3d11va
1276     dxva2
1277     libmfx
1278     mmal
1279     nvenc
1280     omx
1281     vaapi
1282     vda
1283     vdpau
1284 "
1285
1286 EXTERNAL_LIBRARY_GPL_LIST="
1287     libcdio
1288     libx264
1289     libx265
1290     libxavs
1291     libxvid
1292 "
1293
1294 EXTERNAL_LIBRARY_NONFREE_LIST="
1295     libfaac
1296     libfdk_aac
1297     openssl
1298 "
1299
1300 EXTERNAL_LIBRARY_VERSION3_LIST="
1301     libopencore_amrnb
1302     libopencore_amrwb
1303     libvo_aacenc
1304     libvo_amrwbenc
1305 "
1306
1307 EXTERNAL_LIBRARY_LIST="
1308     $EXTERNAL_LIBRARY_GPL_LIST
1309     $EXTERNAL_LIBRARY_NONFREE_LIST
1310     $EXTERNAL_LIBRARY_VERSION3_LIST
1311     avisynth
1312     avxsynth
1313     frei0r
1314     gnutls
1315     libbs2b
1316     libdc1394
1317     libdcadec
1318     libfontconfig
1319     libfreetype
1320     libgsm
1321     libhdcd
1322     libilbc
1323     libjack
1324     libkvazaar
1325     libmp3lame
1326     libopencv
1327     libopenh264
1328     libopenjpeg
1329     libopus
1330     libpulse
1331     librtmp
1332     libschroedinger
1333     libsnappy
1334     libspeex
1335     libtheora
1336     libtwolame
1337     libvorbis
1338     libvpx
1339     libwavpack
1340     libwebp
1341     libxcb
1342     libxcb_shm
1343     libxcb_xfixes
1344 "
1345
1346 SYSTEM_LIBRARY_LIST="
1347     bzlib
1348     zlib
1349 "
1350
1351 FEATURE_LIST="
1352     gray
1353     hardcoded_tables
1354     omx_rpi
1355     runtime_cpudetect
1356     safe_bitstream_reader
1357     shared
1358     small
1359     sram
1360     static
1361     swscale_alpha
1362 "
1363
1364 LIBRARY_LIST="
1365     avcodec
1366     avdevice
1367     avfilter
1368     avformat
1369     avresample
1370     avutil
1371     swscale
1372 "
1373
1374 LICENSE_LIST="
1375     gpl
1376     nonfree
1377     version3
1378 "
1379
1380 PROGRAM_LIST="
1381     avconv
1382     avplay
1383     avprobe
1384 "
1385
1386 SUBSYSTEM_LIST="
1387     dct
1388     doc
1389     error_resilience
1390     faan
1391     fft
1392     lsp
1393     lzo
1394     mdct
1395     network
1396     rdft
1397 "
1398
1399 # COMPONENT_LIST needs to come last to ensure correct dependency checking
1400 CONFIG_LIST="
1401     $EXAMPLE_LIST
1402     $EXTERNAL_LIBRARY_LIST
1403     $HWACCEL_LIBRARY_LIST
1404     $FEATURE_LIST
1405     $LICENSE_LIST
1406     $LIBRARY_LIST
1407     $PROGRAM_LIST
1408     $SUBSYSTEM_LIST
1409     $SYSTEM_LIBRARY_LIST
1410     neon_clobber_test
1411     pic
1412     pod2man
1413     texi2html
1414     thumb
1415     valgrind_backtrace
1416     xmm_clobber_test
1417     $COMPONENT_LIST
1418 "
1419
1420 THREADS_LIST="
1421     pthreads
1422     w32threads
1423 "
1424
1425 ATOMICS_LIST="
1426     atomics_gcc
1427     atomics_suncc
1428     atomics_win32
1429 "
1430
1431 ARCH_LIST="
1432     aarch64
1433     alpha
1434     arm
1435     avr32
1436     avr32_ap
1437     avr32_uc
1438     bfin
1439     ia64
1440     m68k
1441     mips
1442     mips64
1443     parisc
1444     ppc
1445     ppc64
1446     s390
1447     sh4
1448     sparc
1449     sparc64
1450     tilegx
1451     tilepro
1452     tomi
1453     x86
1454     x86_32
1455     x86_64
1456 "
1457
1458 ARCH_EXT_LIST_ARM="
1459     armv5te
1460     armv6
1461     armv6t2
1462     armv8
1463     neon
1464     vfp
1465     vfpv3
1466 "
1467
1468 ARCH_EXT_LIST_X86_SIMD="
1469     amd3dnow
1470     amd3dnowext
1471     avx
1472     avx2
1473     fma3
1474     fma4
1475     mmx
1476     mmxext
1477     sse
1478     sse2
1479     sse3
1480     sse4
1481     sse42
1482     ssse3
1483     xop
1484 "
1485
1486 ARCH_EXT_LIST_PPC="
1487     altivec
1488     dcbzl
1489     ldbrx
1490     power8
1491     ppc4xx
1492     vsx
1493 "
1494
1495 ARCH_EXT_LIST_X86="
1496     $ARCH_EXT_LIST_X86_SIMD
1497     cpunop
1498     i686
1499 "
1500
1501 ARCH_EXT_LIST_MIPS="
1502     loongson
1503     mips32r1
1504     mips64r1
1505     mips32r2
1506     mips64r2
1507     mips32r6
1508     mips64r6
1509 "
1510
1511 ARCH_EXT_LIST="
1512     $ARCH_EXT_LIST_ARM
1513     $ARCH_EXT_LIST_MIPS
1514     $ARCH_EXT_LIST_PPC
1515     $ARCH_EXT_LIST_X86
1516     vis
1517 "
1518
1519 ARCH_FEATURES="
1520     aligned_stack
1521     fast_64bit
1522     fast_clz
1523     fast_cmov
1524     local_aligned_8
1525     local_aligned_16
1526     local_aligned_32
1527     simd_align_16
1528     simd_align_32
1529 "
1530
1531 BUILTIN_LIST="
1532     atomic_cas_ptr
1533     machine_rw_barrier
1534     MemoryBarrier
1535     mm_empty
1536     rdtsc
1537     sem_timedwait
1538     sync_val_compare_and_swap
1539 "
1540 HAVE_LIST_CMDLINE="
1541     inline_asm
1542     symver
1543     x86asm
1544 "
1545
1546 HAVE_LIST_PUB="
1547     bigendian
1548     fast_unaligned
1549 "
1550
1551 HEADERS_LIST="
1552     AVFoundation_AVFoundation_h
1553     alsa_asoundlib_h
1554     arpa_inet_h
1555     cdio_paranoia_h
1556     cdio_paranoia_paranoia_h
1557     d3d11_h
1558     dispatch_dispatch_h
1559     dev_bktr_ioctl_bt848_h
1560     dev_bktr_ioctl_meteor_h
1561     dev_ic_bt8xx_h
1562     dev_video_bktr_ioctl_bt848_h
1563     dev_video_meteor_ioctl_meteor_h
1564     direct_h
1565     dlfcn_h
1566     dxgidebug_h
1567     dxva_h
1568     gsm_h
1569     io_h
1570     mach_mach_time_h
1571     machine_ioctl_bt848_h
1572     machine_ioctl_meteor_h
1573     malloc_h
1574     poll_h
1575     sndio_h
1576     soundcard_h
1577     stdatomic_h
1578     sys_mman_h
1579     sys_param_h
1580     sys_resource_h
1581     sys_select_h
1582     sys_soundcard_h
1583     sys_time_h
1584     sys_un_h
1585     sys_videoio_h
1586     unistd_h
1587     valgrind_valgrind_h
1588     windows_h
1589     winsock2_h
1590 "
1591
1592 INTRINSICS_LIST="
1593     intrinsics_neon
1594 "
1595
1596 MATH_FUNCS="
1597     atanf
1598     atan2f
1599     cbrtf
1600     cosf
1601     exp2
1602     exp2f
1603     expf
1604     isinf
1605     isnan
1606     ldexpf
1607     llrint
1608     llrintf
1609     log2
1610     log2f
1611     log10f
1612     lrint
1613     lrintf
1614     powf
1615     rint
1616     round
1617     roundf
1618     sinf
1619     trunc
1620     truncf
1621 "
1622
1623 SYSTEM_FUNCS="
1624     aligned_malloc
1625     clock_gettime
1626     closesocket
1627     CommandLineToArgvW
1628     CoTaskMemFree
1629     CryptGenRandom
1630     fcntl
1631     flt_lim
1632     fork
1633     getaddrinfo
1634     gethrtime
1635     getopt
1636     GetProcessAffinityMask
1637     GetProcessMemoryInfo
1638     GetProcessTimes
1639     getrusage
1640     GetSystemTimeAsFileTime
1641     gettimeofday
1642     gmtime_r
1643     inet_aton
1644     isatty
1645     LoadLibrary
1646     localtime_r
1647     mach_absolute_time
1648     MapViewOfFile
1649     memalign
1650     mkstemp
1651     mmap
1652     mprotect
1653     nanosleep
1654     posix_memalign
1655     sched_getaffinity
1656     SetConsoleTextAttribute
1657     setmode
1658     setrlimit
1659     Sleep
1660     strerror_r
1661     sysconf
1662     sysctl
1663     usleep
1664     VirtualAlloc
1665 "
1666
1667 TOOLCHAIN_FEATURES="
1668     as_arch_directive
1669     as_fpu_directive
1670     as_func
1671     as_object_arch
1672     asm_mod_q
1673     attribute_may_alias
1674     attribute_packed
1675     blocks_extension
1676     ebp_available
1677     ebx_available
1678     gnu_as
1679     ibm_asm
1680     inline_asm_labels
1681     pragma_deprecated
1682     symver_asm_label
1683     symver_gnu_asm
1684     vfp_args
1685     xform_asm
1686     xmm_clobbers
1687 "
1688
1689 TYPES_LIST="
1690     CONDITION_VARIABLE_Ptr
1691     CUVIDDECODECREATEINFO_bitDepthMinus8
1692     socklen_t
1693     struct_addrinfo
1694     struct_group_source_req
1695     struct_ip_mreq_source
1696     struct_ipv6_mreq
1697     struct_pollfd
1698     struct_rusage_ru_maxrss
1699     struct_sockaddr_in6
1700     struct_sockaddr_sa_len
1701     struct_sockaddr_storage
1702     struct_v4l2_frmivalenum_discrete
1703 "
1704
1705 HAVE_LIST="
1706     $ARCH_EXT_LIST
1707     $(add_suffix _external $ARCH_EXT_LIST)
1708     $(add_suffix _inline   $ARCH_EXT_LIST)
1709     $ARCH_FEATURES
1710     $BUILTIN_LIST
1711     $HAVE_LIST_CMDLINE
1712     $HAVE_LIST_PUB
1713     $HEADERS_LIST
1714     $INTRINSICS_LIST
1715     $MATH_FUNCS
1716     $SYSTEM_FUNCS
1717     $THREADS_LIST
1718     $TOOLCHAIN_FEATURES
1719     $TYPES_LIST
1720     dos_paths
1721     libc_msvcrt
1722     MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
1723     sdl
1724     section_data_rel_ro
1725     threads
1726     uwp
1727     vaapi_drm
1728     vaapi_x11
1729     vdpau_x11
1730 "
1731
1732 # options emitted with CONFIG_ prefix but not available on the command line
1733 CONFIG_EXTRA="
1734     aandcttables
1735     ac3dsp
1736     adts_header
1737     audio_frame_queue
1738     audiodsp
1739     blockdsp
1740     bswapdsp
1741     cabac
1742     cbs
1743     cbs_h264
1744     cbs_h265
1745     cbs_mpeg2
1746     dirac_parse
1747     dvprofile
1748     faandct
1749     faanidct
1750     fdctdsp
1751     flacdsp
1752     fmtconvert
1753     g722dsp
1754     gmp
1755     golomb
1756     gplv3
1757     h263dsp
1758     h264chroma
1759     h264dsp
1760     h264parse
1761     h264pred
1762     h264qpel
1763     hevc_ps
1764     hpeldsp
1765     huffman
1766     huffyuvdsp
1767     huffyuvencdsp
1768     idctdsp
1769     iirfilter
1770     imdct15
1771     intrax8
1772     iso_media
1773     ividsp
1774     jpegtables
1775     lgplv3
1776     libx262
1777     libxcb_shape
1778     lpc
1779     lzf
1780     me_cmp
1781     mpeg_er
1782     mpegaudio
1783     mpegaudiodsp
1784     mpegaudioheader
1785     mpegvideo
1786     mpegvideoenc
1787     mss34dsp
1788     pixblockdsp
1789     qpeldsp
1790     qsv
1791     qsvdec
1792     qsvenc
1793     qsvvpp
1794     rangecoder
1795     riffdec
1796     riffenc
1797     rtpdec
1798     rtpenc_chain
1799     rv34dsp
1800     sinewin
1801     snappy
1802     srtp
1803     startcode
1804     texturedsp
1805     texturedspenc
1806     tpeldsp
1807     vaapi_encode
1808     vc1dsp
1809     videodsp
1810     vp3dsp
1811     vp56dsp
1812     vp8dsp
1813     wma_freqs
1814     wmv2dsp
1815 "
1816
1817 CMDLINE_SELECT="
1818     $ARCH_EXT_LIST
1819     $CONFIG_LIST
1820     $HAVE_LIST_CMDLINE
1821     $THREADS_LIST
1822     asm
1823     cross_compile
1824     debug
1825     extra_warnings
1826     logging
1827     lto
1828     optimizations
1829     rpath
1830 "
1831
1832 PATHS_LIST="
1833     bindir
1834     datadir
1835     docdir
1836     incdir
1837     libdir
1838     mandir
1839     prefix
1840     shlibdir
1841 "
1842
1843 CMDLINE_SET="
1844     $PATHS_LIST
1845     ar
1846     arch
1847     as
1848     cc
1849     objcc
1850     cpu
1851     cross_prefix
1852     custom_allocator
1853     dep_cc
1854     env
1855     extra_version
1856     host_cc
1857     host_cflags
1858     host_extralibs
1859     host_ld
1860     host_ldflags
1861     host_os
1862     ignore_tests
1863     ld
1864     logfile
1865     malloc_prefix
1866     nm
1867     optflags
1868     pkg_config
1869     pkg_config_flags
1870     random_seed
1871     samples
1872     sysinclude
1873     sysroot
1874     target_exec
1875     target_os
1876     target_path
1877     target_samples
1878     toolchain
1879     x86asmexe
1880 "
1881
1882 CMDLINE_APPEND="
1883     extra_cflags
1884     extra_objcflags
1885     host_cppflags
1886 "
1887
1888 # code dependency declarations
1889
1890 # architecture extensions
1891
1892 armv5te_deps="arm"
1893 armv6_deps="arm"
1894 armv6t2_deps="arm"
1895 armv8_deps="aarch64"
1896 neon_deps_any="aarch64 arm"
1897 intrinsics_neon_deps="neon"
1898 vfp_deps_any="aarch64 arm"
1899 vfpv3_deps="vfp"
1900
1901 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1902
1903 altivec_deps="ppc"
1904 dcbzl_deps="ppc"
1905 ldbrx_deps="ppc"
1906 ppc4xx_deps="ppc"
1907 vsx_deps="altivec"
1908 power8_deps="vsx"
1909
1910 loongson_deps="mips"
1911 mips32r1_deps="mips32"
1912 mips32r2_deps="mips32"
1913 mips32r6_deps="mips32"
1914 mips64r1_deps="mips64"
1915 mips64r2_deps="mips64"
1916 mips64r6_deps="mips64"
1917
1918 vis_deps="sparc"
1919
1920 cpunop_deps="i686"
1921 x86_64_select="i686"
1922 x86_64_suggest="fast_cmov"
1923
1924 amd3dnow_deps="mmx"
1925 amd3dnowext_deps="amd3dnow"
1926 i686_deps="x86"
1927 mmx_deps="x86"
1928 mmxext_deps="mmx"
1929 sse_deps="mmxext"
1930 sse2_deps="sse"
1931 sse3_deps="sse2"
1932 ssse3_deps="sse3"
1933 sse4_deps="ssse3"
1934 sse42_deps="sse4"
1935 avx_deps="sse42"
1936 xop_deps="avx"
1937 fma3_deps="avx"
1938 fma4_deps="avx"
1939 avx2_deps="avx"
1940
1941 mmx_external_deps="x86asm"
1942 mmx_inline_deps="inline_asm x86"
1943 mmx_suggest="mmx_external mmx_inline"
1944
1945 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1946     eval dep=\$${ext}_deps
1947     eval ${ext}_external_deps='"${dep}_external"'
1948     eval ${ext}_inline_deps='"${dep}_inline"'
1949     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1950 done
1951
1952 aligned_stack_if_any="aarch64 ppc x86"
1953 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1954 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1955 fast_unaligned_if_any="aarch64 ppc x86"
1956 simd_align_16_if_any="altivec neon sse"
1957 simd_align_32_if_any="avx"
1958
1959 # system capabilities
1960 symver_if_any="symver_asm_label symver_gnu_asm"
1961 valgrind_backtrace_conflict="optimizations"
1962 valgrind_backtrace_deps="valgrind_valgrind_h"
1963
1964 # threading support
1965 atomics_gcc_if="sync_val_compare_and_swap"
1966 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1967 atomics_win32_if="MemoryBarrier"
1968 atomics_native_if_any="$ATOMICS_LIST"
1969 w32threads_deps="atomics_native"
1970 threads_if_any="$THREADS_LIST"
1971
1972 # subsystems
1973 cbs_h264_select="cbs golomb"
1974 cbs_h265_select="cbs golomb"
1975 cbs_mpeg2_select="cbs"
1976 dct_select="rdft"
1977 dirac_parse_select="golomb"
1978 error_resilience_select="me_cmp"
1979 faandct_deps="faan"
1980 faandct_select="fdctdsp"
1981 faanidct_deps="faan"
1982 faanidct_select="idctdsp"
1983 h264dsp_select="startcode"
1984 hevc_ps_select="golomb"
1985 intrax8_select="blockdsp idctdsp"
1986 mdct_select="fft"
1987 rdft_select="fft"
1988 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1989 mpeg_er_select="error_resilience"
1990 mpegaudio_select="mpegaudiodsp mpegaudioheader"
1991 mpegaudiodsp_select="dct"
1992 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp mpeg_er videodsp"
1993 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1994 vc1dsp_select="h264chroma qpeldsp startcode"
1995
1996 # decoders / encoders
1997 aac_decoder_select="adts_header imdct15 mdct sinewin"
1998 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1999 aac_latm_decoder_select="aac_decoder aac_latm_parser"
2000 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
2001 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
2002 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
2003 adpcm_g722_decoder_select="g722dsp"
2004 adpcm_g722_encoder_select="g722dsp"
2005 aic_decoder_select="golomb idctdsp"
2006 alac_encoder_select="lpc"
2007 als_decoder_select="bswapdsp"
2008 amrnb_decoder_select="lsp"
2009 amrwb_decoder_select="lsp"
2010 amv_decoder_select="sp5x_decoder"
2011 ape_decoder_select="bswapdsp"
2012 asv1_decoder_select="blockdsp bswapdsp idctdsp"
2013 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
2014 asv2_decoder_select="blockdsp bswapdsp idctdsp"
2015 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
2016 atrac1_decoder_select="mdct sinewin"
2017 atrac3_decoder_select="mdct"
2018 atrac3p_decoder_select="mdct sinewin"
2019 bink_decoder_select="blockdsp hpeldsp"
2020 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
2021 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
2022 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
2023 clearvideo_decoder_select="idctdsp"
2024 cllc_decoder_select="bswapdsp"
2025 comfortnoise_encoder_select="lpc"
2026 cook_decoder_select="audiodsp mdct sinewin"
2027 cscd_decoder_select="lzo"
2028 cscd_decoder_suggest="zlib"
2029 dca_decoder_select="fmtconvert mdct"
2030 dds_decoder_select="texturedsp"
2031 dnxhd_decoder_select="blockdsp idctdsp"
2032 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
2033 dvvideo_decoder_select="dvprofile idctdsp"
2034 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
2035 dxa_decoder_deps="zlib"
2036 dxv_decoder_select="lzf texturedsp"
2037 eac3_decoder_select="ac3_decoder"
2038 eac3_encoder_select="ac3_encoder"
2039 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
2040 eatgq_decoder_select="aandcttables idctdsp"
2041 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
2042 exr_decoder_deps="zlib"
2043 ffv1_decoder_select="rangecoder"
2044 ffv1_encoder_select="rangecoder"
2045 ffvhuff_decoder_select="huffyuv_decoder"
2046 ffvhuff_encoder_select="huffyuv_encoder"
2047 fic_decoder_select="golomb"
2048 flac_decoder_select="flacdsp"
2049 flac_encoder_select="bswapdsp flacdsp lpc"
2050 flashsv_decoder_deps="zlib"
2051 flashsv_encoder_deps="zlib"
2052 flashsv2_decoder_deps="zlib"
2053 flv_decoder_select="h263_decoder"
2054 flv_encoder_select="h263_encoder"
2055 fourxm_decoder_select="blockdsp bswapdsp"
2056 fraps_decoder_select="bswapdsp huffman"
2057 g2m_decoder_deps="zlib"
2058 g2m_decoder_select="blockdsp idctdsp jpegtables"
2059 h261_decoder_select="mpeg_er mpegvideo"
2060 h261_encoder_select="aandcttables mpegvideoenc"
2061 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
2062 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
2063 h263i_decoder_select="h263_decoder"
2064 h263p_encoder_select="h263_encoder"
2065 h264_decoder_select="cabac golomb h264chroma h264dsp h264parse h264pred h264qpel videodsp"
2066 h264_decoder_suggest="error_resilience"
2067 hap_decoder_select="snappy texturedsp"
2068 hap_encoder_deps="libsnappy"
2069 hap_encoder_select="texturedspenc"
2070 hevc_decoder_select="bswapdsp cabac hevc_ps videodsp"
2071 huffyuv_decoder_select="bswapdsp huffyuvdsp"
2072 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
2073 iac_decoder_select="imc_decoder"
2074 imc_decoder_select="bswapdsp fft mdct sinewin"
2075 indeo3_decoder_select="hpeldsp"
2076 indeo4_decoder_select="ividsp"
2077 indeo5_decoder_select="ividsp"
2078 interplay_video_decoder_select="hpeldsp"
2079 jpegls_decoder_select="mjpeg_decoder"
2080 jv_decoder_select="blockdsp"
2081 lagarith_decoder_select="huffyuvdsp"
2082 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
2083 magicyuv_decoder_select="huffyuvdsp"
2084 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2085 metasound_decoder_select="lsp mdct sinewin"
2086 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2087 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
2088 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
2089 mjpegb_decoder_select="mjpeg_decoder"
2090 mlp_decoder_select="mlp_parser"
2091 motionpixels_decoder_select="bswapdsp"
2092 mp1_decoder_select="mpegaudio"
2093 mp1float_decoder_select="mpegaudio"
2094 mp2_decoder_select="mpegaudio"
2095 mp2float_decoder_select="mpegaudio"
2096 mp3_decoder_select="mpegaudio"
2097 mp3adu_decoder_select="mpegaudio"
2098 mp3adufloat_decoder_select="mpegaudio"
2099 mp3float_decoder_select="mpegaudio"
2100 mp3on4_decoder_select="mpegaudio"
2101 mp3on4float_decoder_select="mpegaudio"
2102 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2103 mpc8_decoder_select="mpegaudiodsp"
2104 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2105 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2106 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2107 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2108 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2109 mpeg4_encoder_select="h263_encoder"
2110 msa1_decoder_select="mss34dsp"
2111 msmpeg4v1_decoder_select="h263_decoder"
2112 msmpeg4v2_decoder_select="h263_decoder"
2113 msmpeg4v2_encoder_select="h263_encoder"
2114 msmpeg4v3_decoder_select="h263_decoder"
2115 msmpeg4v3_encoder_select="h263_encoder"
2116 mss2_decoder_select="error_resilience mpeg_er mpegvideo qpeldsp vc1_decoder"
2117 mts2_decoder_select="mss34dsp"
2118 mxpeg_decoder_select="mjpeg_decoder"
2119 nellymoser_decoder_select="mdct sinewin"
2120 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2121 nuv_decoder_select="idctdsp lzo"
2122 on2avc_decoder_select="mdct"
2123 opus_decoder_deps="avresample"
2124 opus_decoder_select="imdct15"
2125 png_decoder_deps="zlib"
2126 png_encoder_deps="zlib"
2127 png_encoder_select="huffyuvencdsp"
2128 prores_decoder_select="idctdsp"
2129 prores_encoder_select="fdctdsp"
2130 qcelp_decoder_select="lsp"
2131 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2132 ra_144_encoder_select="audio_frame_queue lpc"
2133 ralf_decoder_select="golomb"
2134 rscc_decoder_deps="zlib"
2135 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2136 rv10_encoder_select="h263_encoder"
2137 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2138 rv20_encoder_select="h263_encoder"
2139 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2140 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2141 screenpresso_decoder_deps="zlib"
2142 sipr_decoder_select="lsp"
2143 sp5x_decoder_select="mjpeg_decoder"
2144 svq1_decoder_select="hpeldsp"
2145 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2146 svq3_decoder_select="golomb h264dsp h264parse h264pred hpeldsp tpeldsp videodsp"
2147 svq3_decoder_suggest="zlib"
2148 tak_decoder_select="audiodsp"
2149 tdsc_decoder_deps="zlib"
2150 tdsc_decoder_select="mjpeg_decoder"
2151 theora_decoder_select="vp3_decoder"
2152 thp_decoder_select="mjpeg_decoder"
2153 tiff_decoder_suggest="zlib"
2154 tiff_encoder_suggest="zlib"
2155 truehd_decoder_select="mlp_decoder"
2156 truemotion2_decoder_select="bswapdsp"
2157 truespeech_decoder_select="bswapdsp"
2158 tscc_decoder_deps="zlib"
2159 txd_decoder_select="texturedsp"
2160 twinvq_decoder_select="mdct lsp sinewin"
2161 utvideo_decoder_select="bswapdsp huffyuvdsp"
2162 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2163 vble_decoder_select="huffyuvdsp"
2164 vc1_decoder_select="blockdsp error_resilience h263_decoder h264qpel intrax8 mpeg_er mpegvideo vc1dsp"
2165 vc1image_decoder_select="vc1_decoder"
2166 vorbis_decoder_select="mdct"
2167 vorbis_encoder_select="mdct"
2168 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2169 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2170 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2171 vp6a_decoder_select="vp6_decoder"
2172 vp6f_decoder_select="vp6_decoder"
2173 vp7_decoder_select="h264pred videodsp vp8dsp"
2174 vp8_decoder_select="h264pred videodsp vp8dsp"
2175 vp9_decoder_select="videodsp vp9_superframe_split_bsf"
2176 webp_decoder_select="vp8_decoder"
2177 wmapro_decoder_select="mdct sinewin wma_freqs"
2178 wmav1_decoder_select="mdct sinewin wma_freqs"
2179 wmav1_encoder_select="mdct sinewin wma_freqs"
2180 wmav2_decoder_select="mdct sinewin wma_freqs"
2181 wmav2_encoder_select="mdct sinewin wma_freqs"
2182 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2183 wmv1_decoder_select="h263_decoder"
2184 wmv1_encoder_select="h263_encoder"
2185 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2186 wmv2_encoder_select="h263_encoder wmv2dsp"
2187 wmv3_decoder_select="vc1_decoder"
2188 wmv3image_decoder_select="wmv3_decoder"
2189 zerocodec_decoder_deps="zlib"
2190 zlib_decoder_deps="zlib"
2191 zlib_encoder_deps="zlib"
2192 zmbv_decoder_deps="zlib"
2193 zmbv_encoder_deps="zlib"
2194
2195 # hardware accelerators
2196 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2197 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode ole32"
2198 vda_deps="VideoDecodeAcceleration_VDADecoder_h blocks_extension pthreads"
2199 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2200
2201 h263_vaapi_hwaccel_deps="vaapi"
2202 h263_vaapi_hwaccel_select="h263_decoder"
2203 h264_cuvid_hwaccel_deps="cuvid CUVIDH264PICPARAMS"
2204 h264_cuvid_hwaccel_select="h264_decoder"
2205 h264_d3d11va_hwaccel_deps="d3d11va"
2206 h264_d3d11va_hwaccel_select="h264_decoder"
2207 h264_d3d11va2_hwaccel_deps="d3d11va"
2208 h264_d3d11va2_hwaccel_select="h264_decoder"
2209 h264_dxva2_hwaccel_deps="dxva2"
2210 h264_dxva2_hwaccel_select="h264_decoder"
2211 h264_mmal_hwaccel_deps="mmal"
2212 h264_qsv_hwaccel_deps="libmfx"
2213 h264_vaapi_hwaccel_deps="vaapi"
2214 h264_vaapi_hwaccel_select="h264_decoder"
2215 h264_vda_hwaccel_deps="vda"
2216 h264_vda_hwaccel_select="h264_decoder"
2217 h264_vda_old_hwaccel_deps="vda"
2218 h264_vda_old_hwaccel_select="h264_decoder"
2219 h264_vdpau_hwaccel_deps="vdpau"
2220 h264_vdpau_hwaccel_select="h264_decoder"
2221 hevc_cuvid_hwaccel_deps="cuvid CUVIDHEVCPICPARAMS"
2222 hevc_cuvid_hwaccel_select="hevc_decoder"
2223 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2224 hevc_d3d11va_hwaccel_select="hevc_decoder"
2225 hevc_d3d11va2_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2226 hevc_d3d11va2_hwaccel_select="hevc_decoder"
2227 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2228 hevc_dxva2_hwaccel_select="hevc_decoder"
2229 hevc_qsv_hwaccel_deps="libmfx"
2230 hevc_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferHEVC"
2231 hevc_vaapi_hwaccel_select="hevc_decoder"
2232 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2233 hevc_vdpau_hwaccel_select="hevc_decoder"
2234 mpeg1_vdpau_hwaccel_deps="vdpau"
2235 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2236 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2237 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2238 mpeg2_d3d11va2_hwaccel_deps="d3d11va"
2239 mpeg2_d3d11va2_hwaccel_select="mpeg2video_decoder"
2240 mpeg2_dxva2_hwaccel_deps="dxva2"
2241 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2242 mpeg2_mmal_hwaccel_deps="mmal"
2243 mpeg2_qsv_hwaccel_deps="libmfx"
2244 mpeg2_vaapi_hwaccel_deps="vaapi"
2245 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2246 mpeg2_vdpau_hwaccel_deps="vdpau"
2247 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2248 mpeg4_vaapi_hwaccel_deps="vaapi"
2249 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2250 mpeg4_vdpau_hwaccel_deps="vdpau"
2251 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2252 vc1_d3d11va_hwaccel_deps="d3d11va"
2253 vc1_d3d11va_hwaccel_select="vc1_decoder"
2254 vc1_d3d11va2_hwaccel_deps="d3d11va"
2255 vc1_d3d11va2_hwaccel_select="vc1_decoder"
2256 vc1_dxva2_hwaccel_deps="dxva2"
2257 vc1_dxva2_hwaccel_select="vc1_decoder"
2258 vc1_mmal_hwaccel_deps="mmal"
2259 vc1_qsv_hwaccel_deps="libmfx"
2260 vc1_vaapi_hwaccel_deps="vaapi"
2261 vc1_vaapi_hwaccel_select="vc1_decoder"
2262 vc1_vdpau_hwaccel_deps="vdpau"
2263 vc1_vdpau_hwaccel_select="vc1_decoder"
2264 vp8_qsv_hwaccel_deps="libmfx"
2265 vp8_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferVP8"
2266 vp8_vaapi_hwaccel_select="vp8_decoder"
2267 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2268 wmv3_d3d11va2_hwaccel_select="vc1_d3d11va2_hwaccel"
2269 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2270 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2271 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2272
2273 # hardware-accelerated codecs
2274 nvenc_deps_any="libdl LoadLibrary"
2275 omx_deps="libdl pthreads"
2276 omx_rpi_select="omx"
2277 qsv_deps="libmfx"
2278 qsvdec_select="qsv"
2279 qsvenc_select="qsv"
2280 qsvvpp_select="qsv"
2281 vaapi_encode_deps="vaapi"
2282
2283 hwupload_cuda_filter_deps="cuda"
2284 scale_npp_filter_deps="cuda libnpp"
2285
2286 h264_mmal_decoder_deps="mmal"
2287 h264_nvenc_encoder_deps="nvenc"
2288 h264_omx_encoder_deps="omx"
2289 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
2290 h264_qsv_encoder_select="qsvenc"
2291 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
2292 h264_vaapi_encoder_select="cbs_h264 vaapi_encode"
2293 hevc_nvenc_encoder_deps="nvenc"
2294 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser hevc_qsv_hwaccel qsvdec"
2295 hevc_qsv_encoder_select="hevc_ps qsvenc"
2296 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
2297 hevc_vaapi_encoder_select="cbs_h265 vaapi_encode"
2298 mjpeg_qsv_encoder_deps="libmfx"
2299 mjpeg_qsv_encoder_select="qsvenc"
2300 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
2301 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
2302 mpeg2_mmal_decoder_deps="mmal"
2303 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2304 mpeg2_qsv_encoder_select="qsvenc"
2305 mpeg2_vaapi_encoder_deps="VAEncPictureParameterBufferMPEG2"
2306 mpeg2_vaapi_encoder_select="cbs_mpeg2 vaapi_encode"
2307 mpeg4_omx_encoder_deps="omx"
2308 vc1_mmal_decoder_deps="mmal"
2309 vc1_qsv_decoder_select="qsvdec vc1_qsv_hwaccel vc1_parser"
2310 vp8_qsv_decoder_select="qsvdec vp8_qsv_hwaccel vp8_parser"
2311 vp8_vaapi_encoder_deps="VAEncPictureParameterBufferVP8"
2312 vp8_vaapi_encoder_select="vaapi_encode"
2313 vp9_vaapi_encoder_deps="VAEncPictureParameterBufferVP9"
2314 vp9_vaapi_encoder_select="vaapi_encode"
2315
2316 nvenc_h264_encoder_select="h264_nvenc_encoder"
2317 nvenc_hevc_encoder_select="hevc_nvenc_encoder"
2318
2319 # parsers
2320 aac_parser_select="adts_header"
2321 h264_parser_select="golomb h264dsp h264parse"
2322 hevc_parser_select="hevc_ps"
2323 mpegaudio_parser_select="mpegaudioheader"
2324 mpegvideo_parser_select="mpegvideo"
2325 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2326 vc1_parser_select="vc1dsp"
2327
2328 # bitstream_filters
2329 aac_adtstoasc_bsf_select="adts_header"
2330 h264_metadata_bsf_select="cbs_h264"
2331 h264_redundant_pps_bsf_select="cbs_h264"
2332 hevc_metadata_bsf_select="cbs_h265"
2333 mjpeg2jpeg_bsf_select="jpegtables"
2334 mpeg2_metadata_bsf_select="cbs_mpeg2"
2335 trace_headers_bsf_select="cbs_h264 cbs_h265 cbs_mpeg2"
2336
2337 # external libraries
2338 avisynth_deps="LoadLibrary"
2339 avxsynth_deps="libdl"
2340 avisynth_demuxer_deps_any="avisynth avxsynth"
2341 avisynth_demuxer_select="riffdec"
2342 libdcadec_decoder_deps="libdcadec"
2343 libfaac_encoder_deps="libfaac"
2344 libfaac_encoder_select="audio_frame_queue"
2345 libfdk_aac_decoder_deps="libfdk_aac"
2346 libfdk_aac_encoder_deps="libfdk_aac"
2347 libfdk_aac_encoder_select="audio_frame_queue"
2348 libgsm_decoder_deps="libgsm"
2349 libgsm_encoder_deps="libgsm"
2350 libgsm_ms_decoder_deps="libgsm"
2351 libgsm_ms_encoder_deps="libgsm"
2352 libilbc_decoder_deps="libilbc"
2353 libilbc_encoder_deps="libilbc"
2354 libkvazaar_encoder_deps="libkvazaar"
2355 libmp3lame_encoder_deps="libmp3lame"
2356 libmp3lame_encoder_select="audio_frame_queue mpegaudioheader"
2357 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2358 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2359 libopencore_amrnb_encoder_select="audio_frame_queue"
2360 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2361 libopenh264_decoder_deps="libopenh264"
2362 libopenh264_decoder_select="h264_mp4toannexb_bsf"
2363 libopenh264_encoder_deps="libopenh264"
2364 libopenjpeg_decoder_deps="libopenjpeg"
2365 libopenjpeg_encoder_deps="libopenjpeg"
2366 libopus_decoder_deps="libopus"
2367 libopus_encoder_deps="libopus"
2368 libopus_encoder_select="audio_frame_queue"
2369 libschroedinger_decoder_deps="libschroedinger"
2370 libschroedinger_encoder_deps="libschroedinger"
2371 libspeex_decoder_deps="libspeex"
2372 libspeex_encoder_deps="libspeex"
2373 libspeex_encoder_select="audio_frame_queue"
2374 libtheora_encoder_deps="libtheora"
2375 libtwolame_encoder_deps="libtwolame"
2376 libvo_aacenc_encoder_deps="libvo_aacenc"
2377 libvo_aacenc_encoder_select="audio_frame_queue"
2378 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2379 libvorbis_encoder_deps="libvorbis"
2380 libvorbis_encoder_select="audio_frame_queue"
2381 libvpx_vp8_decoder_deps="libvpx"
2382 libvpx_vp8_encoder_deps="libvpx"
2383 libvpx_vp9_decoder_deps="libvpx"
2384 libvpx_vp9_encoder_deps="libvpx"
2385 libwavpack_encoder_deps="libwavpack"
2386 libwavpack_encoder_select="audio_frame_queue"
2387 libwebp_encoder_deps="libwebp"
2388 libx262_encoder_deps="libx262"
2389 libx264_encoder_deps="libx264"
2390 libx265_encoder_deps="libx265"
2391 libxavs_encoder_deps="libxavs"
2392 libxvid_encoder_deps="libxvid mkstemp"
2393
2394 # demuxers / muxers
2395 ac3_demuxer_select="ac3_parser"
2396 asf_demuxer_select="riffdec"
2397 asf_muxer_select="riffenc"
2398 asf_stream_muxer_select="asf_muxer"
2399 avi_demuxer_select="iso_media riffdec"
2400 avi_muxer_select="riffenc"
2401 caf_demuxer_select="iso_media riffdec"
2402 dash_muxer_select="mp4_muxer"
2403 dirac_demuxer_select="dirac_parser"
2404 dv_demuxer_select="dvprofile"
2405 dv_muxer_select="dvprofile"
2406 dxa_demuxer_select="riffdec"
2407 eac3_demuxer_select="ac3_parser"
2408 f4v_muxer_select="mov_muxer"
2409 flac_demuxer_select="flac_parser"
2410 hds_muxer_select="flv_muxer"
2411 hls_muxer_select="mpegts_muxer"
2412 ipod_muxer_select="mov_muxer"
2413 ismv_muxer_select="mov_muxer"
2414 matroska_audio_muxer_select="matroska_muxer"
2415 matroska_demuxer_select="iso_media riffdec"
2416 matroska_demuxer_suggest="bzlib lzo zlib"
2417 matroska_muxer_select="iso_media riffenc"
2418 mmf_muxer_select="riffenc"
2419 mov_demuxer_select="iso_media riffdec"
2420 mov_demuxer_suggest="zlib"
2421 mov_muxer_select="iso_media riffenc rtpenc_chain"
2422 mp3_demuxer_select="mpegaudio_parser"
2423 mp3_muxer_select="mpegaudioheader"
2424 mp4_muxer_select="mov_muxer"
2425 mpegts_demuxer_select="iso_media"
2426 mpegts_muxer_select="adts_muxer latm_muxer"
2427 mpegtsraw_demuxer_select="mpegts_demuxer"
2428 mxf_d10_muxer_select="mxf_muxer"
2429 nut_muxer_select="riffenc"
2430 nuv_demuxer_select="riffdec"
2431 oga_muxer_select="ogg_muxer"
2432 ogg_demuxer_select="dirac_parse"
2433 opus_muxer_select="ogg_muxer"
2434 psp_muxer_select="mov_muxer"
2435 rtp_demuxer_select="sdp_demuxer"
2436 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2437 rtsp_demuxer_select="http_protocol rtpdec"
2438 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2439 sap_demuxer_select="sdp_demuxer"
2440 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2441 sdp_demuxer_select="rtpdec"
2442 smoothstreaming_muxer_select="ismv_muxer"
2443 spdif_demuxer_select="adts_header"
2444 spdif_muxer_select="adts_header"
2445 spx_muxer_select="ogg_muxer"
2446 swf_demuxer_suggest="zlib"
2447 tak_demuxer_select="tak_parser"
2448 tg2_muxer_select="mov_muxer"
2449 tgp_muxer_select="mov_muxer"
2450 w64_demuxer_select="wav_demuxer"
2451 wav_demuxer_select="riffdec"
2452 wav_muxer_select="riffenc"
2453 webm_muxer_select="iso_media riffenc"
2454 wtv_demuxer_select="mpegts_demuxer riffdec"
2455 xmv_demuxer_select="riffdec"
2456 xwma_demuxer_select="riffdec"
2457
2458 # indevs / outdevs
2459 alsa_indev_deps="alsa"
2460 alsa_outdev_deps="alsa"
2461 avfoundation_indev_deps="AVFoundation_AVFoundation_h objc_arc pthreads"
2462 avfoundation_indev_extralibs="-framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia"
2463 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2464 dv1394_indev_deps="dv1394"
2465 dv1394_indev_select="dv_demuxer"
2466 fbdev_indev_deps="linux_fb_h"
2467 jack_indev_deps="libjack"
2468 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
2469 libcdio_indev_deps="libcdio"
2470 libdc1394_indev_deps="libdc1394"
2471 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2472 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2473 pulse_indev_deps="libpulse"
2474 sndio_indev_deps="sndio"
2475 sndio_outdev_deps="sndio"
2476 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2477 vfwcap_indev_deps="vfw32 vfwcap_defines"
2478 xcbgrab_indev_deps="libxcb libxcb_shape"
2479 xcbgrab_indev_suggest="libxcb_shm libxcb_xfixes"
2480
2481 # protocols
2482 ffrtmpcrypt_protocol_conflict="librtmp_protocol"
2483 ffrtmpcrypt_protocol_deps_any="gmp openssl"
2484 ffrtmpcrypt_protocol_select="tcp_protocol"
2485 ffrtmphttp_protocol_conflict="librtmp_protocol"
2486 ffrtmphttp_protocol_select="http_protocol"
2487 gopher_protocol_select="network"
2488 http_protocol_select="tcp_protocol"
2489 http_protocol_suggest="zlib"
2490 httpproxy_protocol_select="tcp_protocol"
2491 httpproxy_protocol_suggest="zlib"
2492 https_protocol_select="tls_protocol"
2493 https_protocol_suggest="zlib"
2494 icecast_protocol_select="http_protocol"
2495 librtmp_protocol_deps="librtmp"
2496 librtmpe_protocol_deps="librtmp"
2497 librtmps_protocol_deps="librtmp"
2498 librtmpt_protocol_deps="librtmp"
2499 librtmpte_protocol_deps="librtmp"
2500 mmsh_protocol_select="http_protocol"
2501 mmst_protocol_select="network"
2502 rtmp_protocol_conflict="librtmp_protocol"
2503 rtmp_protocol_select="tcp_protocol"
2504 rtmp_protocol_suggest="zlib"
2505 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2506 rtmpe_protocol_suggest="zlib"
2507 rtmps_protocol_conflict="librtmp_protocol"
2508 rtmps_protocol_select="tls_protocol"
2509 rtmps_protocol_suggest="zlib"
2510 rtmpt_protocol_select="ffrtmphttp_protocol"
2511 rtmpt_protocol_suggest="zlib"
2512 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2513 rtmpte_protocol_suggest="zlib"
2514 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2515 rtmpts_protocol_suggest="zlib"
2516 rtp_protocol_select="udp_protocol"
2517 sctp_protocol_deps="struct_sctp_event_subscribe"
2518 sctp_protocol_select="network"
2519 srtp_protocol_select="rtp_protocol srtp"
2520 tcp_protocol_select="network"
2521 tls_protocol_deps_any="gnutls openssl"
2522 tls_protocol_select="tcp_protocol"
2523 udp_protocol_select="network"
2524 unix_protocol_deps="sys_un_h"
2525 unix_protocol_select="network"
2526
2527 # filters
2528 asyncts_filter_deps="avresample"
2529 blackframe_filter_deps="gpl"
2530 boxblur_filter_deps="gpl"
2531 bs2b_filter_deps="libbs2b"
2532 cropdetect_filter_deps="gpl"
2533 deinterlace_qsv_filter_deps="libmfx"
2534 deinterlace_vaapi_filter_deps="vaapi"
2535 delogo_filter_deps="gpl"
2536 drawtext_filter_deps="libfreetype"
2537 drawtext_filter_suggest="libfontconfig"
2538 frei0r_filter_deps="frei0r libdl"
2539 frei0r_src_filter_deps="frei0r libdl"
2540 hdcd_filter_deps="libhdcd"
2541 hqdn3d_filter_deps="gpl"
2542 interlace_filter_deps="gpl"
2543 movie_filter_deps="avcodec avformat"
2544 ocv_filter_deps="libopencv"
2545 overlay_qsv_filter_deps="libmfx"
2546 overlay_qsv_filter_select="qsvvpp"
2547 resample_filter_deps="avresample"
2548 scale_filter_deps="swscale"
2549 scale_qsv_filter_deps="libmfx"
2550 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2551 vpp_qsv_filter_deps="libmfx"
2552 vpp_qsv_filter_select="qsvvpp"
2553
2554 # examples
2555 decode_audio_example_deps="avcodec avutil"
2556 decode_video_example_deps="avcodec avutil"
2557 encode_audio_example_deps="avcodec avutil"
2558 encode_video_example_deps="avcodec avutil"
2559 filter_audio_example_deps="avfilter avutil"
2560 metadata_example_deps="avformat avutil"
2561 output_example_deps="avcodec avformat avresample avutil swscale"
2562 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder"
2563 transcode_aac_example_deps="avcodec avformat avresample"
2564
2565 # EXTRALIBS_LIST
2566 cpu_init_extralibs="pthreads_extralibs"
2567 cws2fws_extralibs="zlib_extralibs"
2568
2569 # libraries, in linking order
2570 avcodec_deps="avutil"
2571 avcodec_select="null_bsf"
2572 avdevice_deps="avformat avcodec avutil"
2573 avfilter_deps="avutil"
2574 avformat_deps="avcodec avutil"
2575 avformat_suggest="network"
2576 avresample_deps="avutil"
2577 swscale_deps="avutil"
2578
2579 avcodec_extralibs="pthreads_extralibs libm_extralibs"
2580 avdevice_extralibs="libm_extralibs"
2581 avformat_extralibs="libm_extralibs"
2582 avfilter_extralibs="pthreads_extralibs libm_extralibs"
2583 avresample_extralibs="libm_extralibs"
2584 avutil_extralibs="clock_gettime_extralibs cuda_extralibs cuvid_extralibs d3d11va_extralibs libm_extralibs libmfx_extralibs nanosleep_extralibs pthreads_extralibs user32_extralibs vaapi_extralibs vaapi_drm_extralibs vaapi_x11_extralibs vdpau_x11_extralibs wincrypt_extralibs"
2585 swscale_extralibs="libm_extralibs"
2586
2587 # programs
2588 avconv_deps="avcodec avfilter avformat avresample swscale"
2589 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2590                fps_filter null_filter resample_filter scale_filter
2591                trim_filter"
2592 avconv_suggest="psapi shell32"
2593 avplay_deps="avcodec avfilter avformat avresample sdl"
2594 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2595 avplay_suggest="shell32"
2596 avprobe_deps="avcodec avformat"
2597 avprobe_suggest="shell32"
2598
2599 # documentation
2600 pod2man_deps="doc"
2601 texi2html_deps="doc"
2602
2603 # default parameters
2604
2605 logfile="avbuild/config.log"
2606
2607 # installation paths
2608 prefix_default="/usr/local"
2609 bindir_default='${prefix}/bin'
2610 datadir_default='${prefix}/share/avconv'
2611 docdir_default='${prefix}/share/doc/libav'
2612 incdir_default='${prefix}/include'
2613 libdir_default='${prefix}/lib'
2614 mandir_default='${prefix}/share/man'
2615 shlibdir_default="$libdir_default"
2616
2617 # toolchain
2618 ar_default="ar"
2619 cc_default="gcc"
2620 host_cc_default="gcc"
2621 x86asmexe_default="nasm"
2622 ln_s="ln -s -f"
2623 nm_default="nm -g"
2624 pkg_config_default=pkg-config
2625 ranlib="ranlib"
2626 strip="strip"
2627 version_script='--version-script'
2628
2629 # machine
2630 arch_default=$(uname -m)
2631 cpu="generic"
2632 intrinsics="none"
2633
2634 # OS
2635 target_os_default=$(tolower $(uname -s))
2636 host_os=$target_os_default
2637
2638 # configurable options
2639 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2640
2641 enable asm
2642 enable debug
2643 enable doc
2644 enable faan faandct faanidct
2645 enable optimizations
2646 enable safe_bitstream_reader
2647 enable static
2648 enable swscale_alpha
2649 enable valgrind_backtrace
2650
2651 # By default, enable only those hwaccels that have no external dependencies.
2652 enable d3d11va dxva2 vda vdpau
2653
2654 # internal components are enabled by default
2655 enable $EXTRALIBS_LIST
2656
2657 # Avoid external, non-system, libraries getting enabled by dependency resolution
2658 disable $EXTERNAL_LIBRARY_LIST
2659
2660 # build settings
2661 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2662 LIBPREF="lib"
2663 LIBSUF=".a"
2664 LIBNAME='$(LIBPREF)$(NAME)$(LIBSUF)'
2665 SLIBPREF="lib"
2666 SLIBSUF=".so"
2667 SLIBNAME='$(SLIBPREF)$(NAME)$(SLIBSUF)'
2668 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2669 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2670 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2671 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2672 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2673 VERSION_SCRIPT_POSTPROCESS_CMD="cat"
2674
2675 asflags_filter=echo
2676 cflags_filter=echo
2677 ldflags_filter=echo
2678
2679 AS_C='-c'
2680 AS_O='-o $@'
2681 CC_C='-c'
2682 CC_E='-E -o $@'
2683 CC_O='-o $@'
2684 OBJCC_C='-c'
2685 OBJCC_E='-E -o $@'
2686 OBJCC_O='-o $@'
2687 X86ASM_O='-o $@'
2688 LD_O='-o $@'
2689 LD_LIB='-l%'
2690 LD_PATH='-L'
2691 HOSTCC_C='-c'
2692 HOSTCC_E='-E -o $@'
2693 HOSTCC_O='-o $@'
2694 HOSTLD_O='-o $@'
2695
2696 host_extralibs='-lm'
2697 host_cflags_filter=echo
2698 host_ldflags_filter=echo
2699
2700 target_path='$(CURDIR)'
2701
2702 # since the object filename is not given with the -MM flag, the compiler
2703 # is only able to print the basename, and we must add the path ourselves
2704 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2705 DEPFLAGS='-MM'
2706
2707 mkdir -p avbuild
2708
2709 # find source path
2710 if test -f configure; then
2711     source_path=.
2712 else
2713     source_path=$(cd $(dirname "$0"); pwd)
2714     echo "$source_path" | grep -q '[[:blank:]]' &&
2715         die "Out of tree builds are impossible with whitespace in source path."
2716     test -e "$source_path/config.h" &&
2717         die "Out of tree builds are impossible with config.h in source dir."
2718 fi
2719
2720 for v in "$@"; do
2721     r=${v#*=}
2722     l=${v%"$r"}
2723     r=$(sh_quote "$r")
2724     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2725 done
2726
2727 find_things(){
2728     thing=$1
2729     pattern=$2
2730     file=$source_path/$3
2731     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2732 }
2733
2734 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2735 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2736 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2737 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2738 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2739 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2740 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2741 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2742 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2743
2744 find_things_extern(){
2745     thing=$1
2746     pattern=$2
2747     file=$source_path/$3
2748     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2749 }
2750
2751 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2752 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2753
2754 AVCODEC_COMPONENTS_LIST="
2755     $BSF_LIST
2756     $DECODER_LIST
2757     $ENCODER_LIST
2758     $HWACCEL_LIST
2759     $PARSER_LIST
2760 "
2761
2762 AVDEVICE_COMPONENTS_LIST="
2763     $INDEV_LIST
2764     $OUTDEV_LIST
2765 "
2766
2767 AVFILTER_COMPONENTS_LIST="
2768     $FILTER_LIST
2769 "
2770
2771 AVFORMAT_COMPONENTS_LIST="
2772     $DEMUXER_LIST
2773     $MUXER_LIST
2774     $PROTOCOL_LIST
2775 "
2776
2777 ALL_COMPONENTS="
2778     $AVCODEC_COMPONENTS_LIST
2779     $AVDEVICE_COMPONENTS_LIST
2780     $AVFILTER_COMPONENTS_LIST
2781     $AVFORMAT_COMPONENTS_LIST
2782 "
2783
2784 for n in $COMPONENT_LIST; do
2785     v=$(toupper ${n%s})_LIST
2786     eval enable \$$v
2787     eval ${n}_if_any="\$$v"
2788 done
2789
2790 enable $ARCH_EXT_LIST
2791
2792 die_unknown(){
2793     echo "Unknown option \"$1\"."
2794     echo "See $0 --help for available options."
2795     exit 1
2796 }
2797
2798 print_3_columns() {
2799     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2800 }
2801
2802 show_list() {
2803     suffix=_$1
2804     shift
2805     echo $* | sed s/$suffix//g | print_3_columns
2806     exit 0
2807 }
2808
2809 rand_list(){
2810     IFS=', '
2811     set -- $*
2812     unset IFS
2813     for thing; do
2814         comp=${thing%:*}
2815         prob=${thing#$comp}
2816         prob=${prob#:}
2817         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2818         echo "prob ${prob:-0.5}"
2819         printf '%s\n' $comp
2820     done
2821 }
2822
2823 do_random(){
2824     action=$1
2825     shift
2826     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2827     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2828 }
2829
2830 for opt do
2831     optval="${opt#*=}"
2832     case "$opt" in
2833         --extra-ldflags=*)
2834             add_ldflags $optval
2835         ;;
2836         --extra-ldexeflags=*)
2837             add_ldexeflags $optval
2838         ;;
2839         --extra-ldsoflags=*)
2840             add_ldsoflags $optval
2841         ;;
2842         --extra-libs=*)
2843             add_extralibs $optval
2844         ;;
2845         --disable-devices)
2846             disable $INDEV_LIST $OUTDEV_LIST
2847         ;;
2848         --enable-debug=*)
2849             debuglevel="$optval"
2850         ;;
2851         --disable-programs)
2852             disable $PROGRAM_LIST
2853         ;;
2854         --disable-everything)
2855             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2856         ;;
2857         --disable-all)
2858             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2859             disable $LIBRARY_LIST $PROGRAM_LIST doc
2860         ;;
2861         --enable-random|--disable-random)
2862             action=${opt%%-random}
2863             do_random ${action#--} $COMPONENT_LIST
2864         ;;
2865         --enable-random=*|--disable-random=*)
2866             action=${opt%%-random=*}
2867             do_random ${action#--} $optval
2868         ;;
2869         --enable-*=*|--disable-*=*)
2870             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2871             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2872             eval list=\$$(toupper $thing)_LIST
2873             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2874             $action $(filter "$name" $list)
2875         ;;
2876         --enable-avserver|--disable-avserver*)
2877             warn "avserver has been removed, the ${opt} option is only"\
2878                  "provided for compatibility and will be removed in the future"
2879         ;;
2880         --enable-yasm|--disable-yasm)
2881             warn "The ${opt} option is only provided for compatibility and will be\n"\
2882                  "removed in the future. Use --enable-x86asm / --disable-x86asm instead."
2883             test $opt = --enable-yasm && x86asm=yes || x86asm=no
2884         ;;
2885         --enable-?*|--disable-?*)
2886             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2887             if is_in $option $COMPONENT_LIST; then
2888                 test $action = disable && action=unset
2889                 eval $action \$$(toupper ${option%s})_LIST
2890             elif is_in $option $CMDLINE_SELECT; then
2891                 $action $option
2892             else
2893                 die_unknown $opt
2894             fi
2895         ;;
2896         --list-*)
2897             NAME="${opt#--list-}"
2898             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2899             NAME=${NAME%s}
2900             eval show_list $NAME \$$(toupper $NAME)_LIST
2901         ;;
2902         --help|-h) show_help
2903         ;;
2904         --quiet|-q) quiet=yes
2905         ;;
2906         *)
2907             optname="${opt%%=*}"
2908             optname="${optname#--}"
2909             optname=$(echo "$optname" | sed 's/-/_/g')
2910             if is_in $optname $CMDLINE_SET; then
2911                 eval $optname='$optval'
2912             elif is_in $optname $CMDLINE_APPEND; then
2913                 append $optname "$optval"
2914             else
2915                 die_unknown $opt
2916             fi
2917         ;;
2918     esac
2919 done
2920
2921 for e in $env; do
2922     eval "export $e"
2923 done
2924
2925 disabled logging && logfile=/dev/null
2926
2927 # Die early if licensing-related configure options are incompatible.
2928 die_license_disabled() {
2929     enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
2930 }
2931
2932 map "die_license_disabled gpl"      $EXTERNAL_LIBRARY_GPL_LIST
2933 map "die_license_disabled nonfree"  $EXTERNAL_LIBRARY_NONFREE_LIST $HWACCEL_LIBRARY_NONFREE_LIST
2934 map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST
2935
2936 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
2937
2938 enabled_all gnutls openssl &&
2939     die "GnuTLS and OpenSSL must not be enabled at the same time."
2940
2941 # Disable all the library-specific components if the library itself
2942 # is disabled, see AVCODEC_LIST and following _LIST variables.
2943
2944 disable_components(){
2945     disabled ${1} && disable $(
2946         eval components="\$$(toupper ${1})_COMPONENTS"
2947         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2948     )
2949 }
2950
2951 map 'disable_components $v' $LIBRARY_LIST
2952
2953 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2954 set >> $logfile
2955
2956 case "$toolchain" in
2957     *-asan)
2958         cc_default="${toolchain%-asan}"
2959         add_cflags  -fsanitize=address
2960         add_ldflags -fsanitize=address
2961     ;;
2962     *-msan)
2963         cc_default="${toolchain%-msan}"
2964         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2965         add_ldflags -fsanitize=memory
2966     ;;
2967     *-tsan)
2968         cc_default="${toolchain%-tsan}"
2969         add_cflags  -fsanitize=thread -fPIE
2970         add_ldflags -fsanitize=thread -pie
2971         case "$toolchain" in
2972             gcc-tsan)
2973                 add_cflags  -fPIC
2974                 add_ldflags -fPIC
2975                 ;;
2976         esac
2977     ;;
2978     *-usan)
2979         cc_default="${toolchain%-usan}"
2980         add_cflags  -fsanitize=undefined
2981         add_ldflags -fsanitize=undefined
2982         case "$toolchain" in
2983             clang-usan)
2984                 add_cflags -O1
2985                 ;;
2986         esac
2987     ;;
2988     valgrind-*)
2989         target_exec_default="valgrind"
2990         case "$toolchain" in
2991             valgrind-massif)
2992                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2993                 ;;
2994             valgrind-memcheck)
2995                 target_exec_args="--track-origins=yes --leak-check=full"
2996                 ;;
2997         esac
2998     ;;
2999     msvc)
3000         # Check whether the current MSVC version needs the C99 converter.
3001         # From MSVC 2013 (compiler major version 18) onwards, it does actually
3002         # support enough of C99 to build libav. Default to the new
3003         # behaviour if the regexp was unable to match anything, since this
3004         # successfully parses the version number of existing supported
3005         # versions that require the converter (MSVC 2010 and 2012).
3006         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
3007         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
3008             cc_default="cl"
3009         else
3010             cc_default="c99wrap cl"
3011         fi
3012         ld_default="$source_path/compat/windows/mslink"
3013         nm_default="dumpbin -symbols"
3014         ar_default="lib"
3015         case "$arch" in
3016         arm*)
3017             as_default="armasm"
3018             ;;
3019         esac
3020         target_os_default="win32"
3021         # Use a relative path for TMPDIR. This makes sure all the
3022         # ffconf temp files are written with a relative path, avoiding
3023         # issues with msys/win32 path conversion for MSVC parameters
3024         # such as -Fo<file> or -out:<file>.
3025         TMPDIR=.
3026     ;;
3027     icl)
3028         cc_default="icl"
3029         ld_default="xilink"
3030         nm_default="dumpbin -symbols"
3031         ar_default="xilib"
3032         target_os_default="win32"
3033         TMPDIR=.
3034     ;;
3035     gcov)
3036         add_cflags  -fprofile-arcs -ftest-coverage
3037         add_ldflags -fprofile-arcs -ftest-coverage
3038     ;;
3039     llvm-cov)
3040         add_cflags -fprofile-arcs -ftest-coverage
3041         add_ldflags --coverage
3042     ;;
3043     hardened)
3044         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
3045         add_cflags   -fno-strict-overflow -fstack-protector-all
3046         add_ldflags  -Wl,-z,relro -Wl,-z,now
3047     ;;
3048     ?*)
3049         die "Unknown toolchain $toolchain"
3050     ;;
3051 esac
3052
3053 test -n "$cross_prefix" && enable cross_compile
3054
3055 if enabled cross_compile; then
3056     test -n "$arch" && test -n "$target_os" ||
3057         die "Must specify target arch (--arch) and OS (--target-os) when cross-compiling"
3058 fi
3059
3060 ar_default="${cross_prefix}${ar_default}"
3061 cc_default="${cross_prefix}${cc_default}"
3062 objcc_default="${cross_prefix}${objcc_default}"
3063 x86asmexe_default="${cross_prefix}${x86asmexe_default}"
3064 nm_default="${cross_prefix}${nm_default}"
3065 pkg_config_default="${cross_prefix}${pkg_config_default}"
3066 ranlib="${cross_prefix}${ranlib}"
3067 strip="${cross_prefix}${strip}"
3068
3069 sysinclude_default="${sysroot}/usr/include"
3070
3071 set_default arch cc pkg_config sysinclude target_exec target_os x86asmexe
3072 enabled cross_compile || host_cc_default=$cc
3073 set_default host_cc
3074
3075 if ! $pkg_config --version >/dev/null 2>&1; then
3076     warn "$pkg_config not found, library detection may fail."
3077     pkg_config=false
3078 fi
3079
3080 exesuf() {
3081     case $1 in
3082         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
3083     esac
3084 }
3085
3086 EXESUF=$(exesuf $target_os)
3087 HOSTEXESUF=$(exesuf $host_os)
3088
3089 # set temporary file name
3090 : ${TMPDIR:=$TEMPDIR}
3091 : ${TMPDIR:=$TMP}
3092 : ${TMPDIR:=/tmp}
3093
3094 if ! check_cmd mktemp -u XXXXXX; then
3095     # simple replacement for missing mktemp
3096     # NOT SAFE FOR GENERAL USE
3097     mktemp(){
3098         tmpname="${2%%XXX*}.${HOSTNAME}.${UID}.$$"
3099         echo "$tmpname"
3100         mkdir "$tmpname"
3101     }
3102 fi
3103
3104 AVTMPDIR=$(mktemp -d "${TMPDIR}/avconf.XXXXXXXX" 2> /dev/null) ||
3105     die "Unable to create temporary directory in $TMPDIR."
3106
3107 tmpfile(){
3108     tmp="${AVTMPDIR}/test"$2
3109     (set -C; exec > $tmp) 2> /dev/null ||
3110         die "Unable to create temporary file in $AVTMPDIR."
3111     eval $1=$tmp
3112 }
3113
3114 trap 'rm -rf -- "$AVTMPDIR"' EXIT
3115 trap 'exit 2' INT
3116
3117 tmpfile TMPASM .asm
3118 tmpfile TMPC   .c
3119 tmpfile TMPE   $EXESUF
3120 tmpfile TMPH   .h
3121 tmpfile TMPO   .o
3122 tmpfile TMPS   .S
3123 tmpfile TMPSH  .sh
3124 tmpfile TMPV   .ver
3125
3126 unset -f mktemp
3127
3128 chmod +x $TMPE
3129
3130 # make sure we can execute files in $TMPDIR
3131 cat > $TMPSH 2>> $logfile <<EOF
3132 #! /bin/sh
3133 EOF
3134 chmod +x $TMPSH >> $logfile 2>&1
3135 if ! $TMPSH >> $logfile 2>&1; then
3136     cat <<EOF
3137 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
3138 variable to another directory and make sure that it is not mounted noexec.
3139 EOF
3140     die "Sanity test failed."
3141 fi
3142
3143 armasm_flags(){
3144     for flag; do
3145         case $flag in
3146             # Filter out MSVC cl.exe options from cflags that shouldn't
3147             # be passed to gas-preprocessor
3148             -M[TD]*)                                            ;;
3149             *)                  echo $flag                      ;;
3150         esac
3151    done
3152 }
3153
3154 ccc_flags(){
3155     for flag; do
3156         case $flag in
3157             -std=c99)           echo -c99                       ;;
3158             -mcpu=*)            echo -arch ${flag#*=}           ;;
3159             -mieee)             echo -ieee                      ;;
3160             -O*|-fast)          echo $flag                      ;;
3161             -fno-math-errno)    echo -assume nomath_errno       ;;
3162             -g)                 echo -g3                        ;;
3163             -Wall)              echo -msg_enable level2         ;;
3164             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
3165             -Wl,*)              echo $flag                      ;;
3166             -f*|-W*)                                            ;;
3167             *)                  echo $flag                      ;;
3168         esac
3169    done
3170 }
3171
3172 cparser_flags(){
3173     for flag; do
3174         case $flag in
3175             -Wno-switch)             echo -Wno-switch-enum ;;
3176             -Wno-format-zero-length) ;;
3177             -Wdisabled-optimization) ;;
3178             -Wno-pointer-sign)       echo -Wno-other ;;
3179             *)                       echo $flag ;;
3180         esac
3181     done
3182 }
3183
3184 msvc_common_flags(){
3185     for flag; do
3186         case $flag in
3187             # In addition to specifying certain flags under the compiler
3188             # specific filters, they must be specified here as well or else the
3189             # generic catch all at the bottom will print the original flag.
3190             -Wall)                ;;
3191             -Wextra)              ;;
3192             -std=c99)             ;;
3193             # Common flags
3194             -fomit-frame-pointer) ;;
3195             -g)                   echo -Z7 ;;
3196             -fno-math-errno)      ;;
3197             -fno-common)          ;;
3198             -fno-signed-zeros)    ;;
3199             -fPIC)                ;;
3200             -mthumb)              ;;
3201             -march=*)             ;;
3202             -lz)                  echo zlib.lib ;;
3203             -lx264)               echo libx264.lib ;;
3204             -l*)                  echo ${flag#-l}.lib ;;
3205             -L*)                  echo -libpath:${flag#-L} ;;
3206             *)                    echo $flag ;;
3207         esac
3208     done
3209 }
3210
3211 msvc_flags(){
3212     msvc_common_flags "$@"
3213     for flag; do
3214         case $flag in
3215             -Wall)                echo -W3 -wd4018 -wd4146 -wd4244 -wd4305     \
3216                                        -wd4554 ;;
3217             -Wextra)              echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3218                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3219                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3220                                        -wd4273 -wd4554 -wd4701 -wd4703 ;;
3221         esac
3222     done
3223 }
3224
3225 icl_flags(){
3226     msvc_common_flags "$@"
3227     for flag; do
3228         case $flag in
3229             # Despite what Intel's documentation says -Wall, which is supported
3230             # on Windows, does enable remarks so disable them here.
3231             -Wall)                echo $flag -Qdiag-disable:remark ;;
3232             -std=c99)             echo -Qstd=c99 ;;
3233         esac
3234     done
3235 }
3236
3237 pgi_flags(){
3238     for flag; do
3239         case $flag in
3240             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3241             -fomit-frame-pointer) echo -Mnoframe ;;
3242             -g)                   echo -gopt ;;
3243             *)                    echo $flag ;;
3244         esac
3245     done
3246 }
3247
3248 suncc_flags(){
3249     for flag; do
3250         case $flag in
3251             -march=*|-mcpu=*)
3252                 case "${flag#*=}" in
3253                     native)                   echo -xtarget=native       ;;
3254                     v9|niagara)               echo -xarch=sparc          ;;
3255                     ultrasparc)               echo -xarch=sparcvis       ;;
3256                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3257                     i586|pentium)             echo -xchip=pentium        ;;
3258                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3259                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3260                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3261                     pentium4*)          echo -xtarget=pentium4           ;;
3262                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3263                     *-sse3)             echo -xarch=sse3                 ;;
3264                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3265                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3266                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3267                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3268                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3269                     k8|opteron|athlon64|athlon-fx)
3270                                                echo -xarch=sse2a         ;;
3271                     athlon*)                   echo -xarch=pentium_proa  ;;
3272                 esac
3273                 ;;
3274             -std=c99)             echo -xc99              ;;
3275             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3276             -fPIC)                echo -KPIC -xcode=pic32 ;;
3277             -W*,*)                echo $flag              ;;
3278             -f*-*|-W*|-mimpure-text)                      ;;
3279             -shared)              echo -G                 ;;
3280             *)                    echo $flag              ;;
3281         esac
3282     done
3283 }
3284
3285 tms470_flags(){
3286     for flag; do
3287         case $flag in
3288             -march=*|-mcpu=*)
3289                 case "${flag#*=}" in
3290                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3291                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3292                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3293                     armv6*|arm11*)          echo -mv=6   ;;
3294                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3295                                             echo -mv=5e  ;;
3296                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3297                 esac
3298                 ;;
3299             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3300             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3301             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3302             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3303             -msoft-float)   echo --float_support=vfplib       ;;
3304             -O[0-3]|-mf=*)  echo $flag                        ;;
3305             -g)             echo -g -mn                       ;;
3306             -pds=*)         echo $flag                        ;;
3307             -D*|-I*)        echo $flag                        ;;
3308             --gcc|--abi=*)  echo $flag                        ;;
3309             -me)            echo $flag                        ;;
3310         esac
3311     done
3312 }
3313
3314 probe_cc(){
3315     pfx=$1
3316     _cc=$2
3317
3318     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3319     unset _ld_o _ldflags _ld_lib _ld_path
3320     unset _depflags _DEPCMD _DEPFLAGS
3321     _flags_filter=echo
3322
3323     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3324         _type=llvm_gcc
3325         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3326         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3327         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3328         _cflags_speed='-O3'
3329         _cflags_size='-Os'
3330     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3331         _type=gcc
3332         gcc_version=$($_cc --version | head -n1)
3333         gcc_basever=$($_cc -dumpversion)
3334         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3335         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3336         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3337         if ! $_cc -dumpversion | grep -q '^2\.'; then
3338             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3339         fi
3340         _cflags_speed='-O3'
3341         _cflags_size='-Os'
3342     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3343         _type=icc
3344         _ident=$($_cc --version | head -n1)
3345         _depflags='-MMD'
3346         _cflags_speed='-O3'
3347         _cflags_size='-Os'
3348         _cflags_noopt='-O1'
3349     elif $_cc -v 2>&1 | grep -q xlc; then
3350         _type=xlc
3351         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3352         _cflags_speed='-O5'
3353         _cflags_size='-O5 -qcompact'
3354     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3355         _type=ccc
3356         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3357         _DEPFLAGS='-M'
3358         _cflags_speed='-fast'
3359         _cflags_size='-O1'
3360         _flags_filter=ccc_flags
3361     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3362         test -d "$sysroot" || die "No valid sysroot specified."
3363         _type=armcc
3364         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3365         armcc_conf="$PWD/armcc.conf"
3366         $_cc --arm_linux_configure                 \
3367              --arm_linux_config_file="$armcc_conf" \
3368              --configure_sysroot="$sysroot"        \
3369              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3370              die "Error creating armcc configuration file."
3371         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3372         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3373         as_default="${cross_prefix}gcc"
3374         _depflags='-MMD'
3375         _cflags_speed='-O3'
3376         _cflags_size='-Os'
3377     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3378         _type=tms470
3379         _ident=$($_cc -version | head -n1 | tr -s ' ')
3380         _flags='--gcc --abi=eabi -me'
3381         _cc_e='-ppl -fe=$@'
3382         _cc_o='-fe=$@'
3383         _depflags='-ppa -ppd=$(@:.o=.d)'
3384         _cflags_speed='-O3 -mf=5'
3385         _cflags_size='-O3 -mf=2'
3386         _flags_filter=tms470_flags
3387     elif $_cc -v 2>&1 | grep -q clang; then
3388         _type=clang
3389         _ident=$($_cc --version 2>/dev/null | head -n1)
3390         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3391         _cflags_speed='-O3'
3392         _cflags_size='-Os'
3393     elif $_cc -V 2>&1 | grep -q Sun; then
3394         _type=suncc
3395         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3396         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3397         _DEPFLAGS='-xM1 -xc99'
3398         _ldflags='-std=c99'
3399         _cflags_speed='-O5'
3400         _cflags_size='-O5 -xspace'
3401         _flags_filter=suncc_flags
3402     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3403         _type=pathscale
3404         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3405         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3406         _cflags_speed='-O2'
3407         _cflags_size='-Os'
3408         _flags_filter='filter_out -Wdisabled-optimization'
3409     elif $_cc -v 2>&1 | grep -q Open64; then
3410         _type=open64
3411         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3412         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3413         _cflags_speed='-O2'
3414         _cflags_size='-Os'
3415         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3416     elif $_cc -V 2>&1 | grep -q Portland; then
3417         _type=pgi
3418         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3419         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3420         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3421         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3422         _cflags_noopt="-O1"
3423         _flags_filter=pgi_flags
3424     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3425         _type=armasm
3426         _ident=$($_cc | head -n1)
3427         # 4509: "This form of conditional instruction is deprecated"
3428         _flags="-nologo -ignore 4509"
3429         _flags_filter=armasm_flags
3430     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3431         _type=msvc
3432         _ident=$($_cc 2>&1 | head -n1)
3433         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3434         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3435         _cflags_speed="-O2"
3436         _cflags_size="-O1"
3437         _cflags_noopt="-O1"
3438         if $_cc -nologo- 2>&1 | grep -q Linker; then
3439             _ld_o='-out:$@'
3440         else
3441             _ld_o='-Fe$@'
3442         fi
3443         _cc_o='-Fo$@'
3444         _cc_e='-P -Fi$@'
3445         _flags_filter=msvc_flags
3446         _ld_lib='lib%.a'
3447         _ld_path='-libpath:'
3448         _flags='-nologo'
3449     elif $_cc 2>&1 | grep -q Intel; then
3450         _type=icl
3451         _ident=$($_cc 2>&1 | head -n1)
3452         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3453         # Not only is O3 broken on 13.x+ but it is slower on all previous
3454         # versions (tested) as well.
3455         _cflags_speed="-O2"
3456         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3457         if $_cc 2>&1 | grep -q Linker; then
3458             _ld_o='-out:$@'
3459         else
3460             _ld_o='-Fe$@'
3461         fi
3462         _cc_o='-Fo$@'
3463         _cc_e='-P'
3464         _flags_filter=icl_flags
3465         _ld_lib='lib%.a'
3466         _ld_path='-libpath:'
3467         # -Qdiag-error to make icl error when seeing certain unknown arguments
3468         _flags='-nologo -Qdiag-error:4044,10157'
3469         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3470         # with MSVC which enables it by default.
3471         _cflags='-Qms0 -Qvec- -Qsimd- -GS'
3472     elif $_cc -? 2>/dev/null | grep -q 'LLVM.*Linker'; then
3473         # lld can emulate multiple different linkers; in ms link.exe mode,
3474         # the -? parameter gives the help output which contains an identifyable
3475         # string, while it gives an error in other modes.
3476         _type=lld-link
3477         # The link.exe mode doesn't have a switch for getting the version,
3478         # but we can force it back to gnu mode and get the version from there.
3479         _ident=$($_cc -flavor gnu --version 2>/dev/null)
3480         _ld_o='-out:$@'
3481         _flags_filter=msvc_flags
3482         _ld_lib='lib%.a'
3483         _ld_path='-libpath:'
3484     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3485         _type=cparser
3486         _ident=$($_cc --version | head -n1)
3487         _depflags='-MMD'
3488         _cflags_speed='-O4'
3489         _cflags_size='-O2'
3490         _flags_filter=cparser_flags
3491     fi
3492
3493     eval ${pfx}_type=\$_type
3494     eval ${pfx}_ident=\$_ident
3495 }
3496
3497 set_ccvars(){
3498     eval ${1}_C=\${_cc_c-\${${1}_C}}
3499     eval ${1}_E=\${_cc_e-\${${1}_E}}
3500     eval ${1}_O=\${_cc_o-\${${1}_O}}
3501
3502     if [ -n "$_depflags" ]; then
3503         eval ${1}_DEPFLAGS=\$_depflags
3504     else
3505         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3506         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3507         eval DEP${1}FLAGS=\$_flags
3508     fi
3509 }
3510
3511 probe_cc cc "$cc"
3512 cflags_filter=$_flags_filter
3513 cflags_speed=$_cflags_speed
3514 cflags_size=$_cflags_size
3515 cflags_noopt=$_cflags_noopt
3516 add_cflags $_flags $_cflags
3517 cc_ldflags=$_ldflags
3518 set_ccvars CC
3519
3520 probe_cc hostcc "$host_cc"
3521 host_cflags_filter=$_flags_filter
3522 host_cflags_speed=$_cflags_speed
3523 add_host_cflags  $_flags $_cflags
3524 set_ccvars HOSTCC
3525
3526 test -n "$cc_type" && enable $cc_type ||
3527     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3528
3529 : ${as_default:=$cc}
3530 : ${objcc_default:=$cc}
3531 : ${dep_cc_default:=$cc}
3532 : ${ld_default:=$cc}
3533 : ${host_ld_default:=$host_cc}
3534 set_default ar as objcc dep_cc ld host_ld
3535
3536 probe_cc as "$as"
3537 asflags_filter=$_flags_filter
3538 add_asflags $_flags $_cflags
3539 set_ccvars AS
3540
3541 probe_cc objcc "$objcc"
3542 objcflags_filter=$_flags_filter
3543 add_objcflags $_flags $_cflags
3544 set_ccvars OBJC
3545
3546 probe_cc ld "$ld"
3547 ldflags_filter=$_flags_filter
3548 add_ldflags $_flags $_ldflags
3549 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3550 LD_O=${_ld_o-$LD_O}
3551 LD_LIB=${_ld_lib-$LD_LIB}
3552 LD_PATH=${_ld_path-$LD_PATH}
3553
3554 probe_cc hostld "$host_ld"
3555 host_ldflags_filter=$_flags_filter
3556 add_host_ldflags $_flags $_ldflags
3557 HOSTLD_O=${_ld_o-$HOSTLD_O}
3558
3559 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3560     probe_cc depcc "$dep_cc"
3561     CCDEP=${_DEPCMD:-$DEPCMD}
3562     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3563     DEPCCFLAGS=$_flags
3564 fi
3565
3566 if $ar 2>&1 | grep -q Microsoft; then
3567     arflags="-nologo"
3568     ar_o='-out:$@'
3569 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3570     arflags="rq"
3571     ar_o='$@'
3572 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3573     arflags='-Xany -r -c'
3574     ar_o='$@'
3575 else
3576     arflags="rc"
3577     ar_o='$@'
3578 fi
3579
3580 add_cflags $extra_cflags
3581 add_objcflags $extra_objcflags
3582 add_asflags $extra_cflags
3583
3584 if test -n "$sysroot"; then
3585     case "$cc_type" in
3586         gcc|llvm_gcc|clang)
3587             add_cppflags --sysroot="$sysroot"
3588             add_ldflags --sysroot="$sysroot"
3589         ;;
3590         tms470)
3591             add_cppflags -I"$sysinclude"
3592             add_ldflags  --sysroot="$sysroot"
3593         ;;
3594     esac
3595 fi
3596
3597 if test "$cpu" = host; then
3598     enabled cross_compile &&
3599         die "--cpu=host makes no sense when cross-compiling."
3600
3601     case "$cc_type" in
3602         gcc|llvm_gcc)
3603             check_native(){
3604                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3605                 sed -n "/cc1.*$1=/{
3606                             s/.*$1=\\([^ ]*\\).*/\\1/
3607                             p
3608                             q
3609                         }" $TMPE
3610             }
3611             cpu=$(check_native -march || check_native -mcpu)
3612         ;;
3613     esac
3614
3615     test "${cpu:-host}" = host &&
3616         die "--cpu=host not supported with compiler $cc"
3617 fi
3618
3619 # Deal with common $arch aliases
3620 case "$arch" in
3621     aarch64|arm64)
3622         arch="aarch64"
3623     ;;
3624     arm*)
3625         arch="arm"
3626     ;;
3627     mips*|IP*)
3628         case "$arch" in
3629         *el)
3630             add_cppflags -EL
3631             add_ldflags -EL
3632         ;;
3633         *eb)
3634             add_cppflags -EB
3635             add_ldflags -EB
3636         ;;
3637         esac
3638         arch="mips"
3639     ;;
3640     parisc*|hppa*)
3641         arch="parisc"
3642     ;;
3643     "Power Macintosh"|ppc*|powerpc*)
3644         arch="ppc"
3645     ;;
3646     s390|s390x)
3647         arch="s390"
3648     ;;
3649     sh4|sh)
3650         arch="sh4"
3651     ;;
3652     sun4u|sparc*)
3653         arch="sparc"
3654     ;;
3655     tilegx|tile-gx)
3656         arch="tilegx"
3657     ;;
3658     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3659         arch="x86"
3660     ;;
3661 esac
3662
3663 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3664 enable $arch
3665
3666 # Add processor-specific flags
3667 if enabled aarch64; then
3668
3669     case $cpu in
3670         armv*)
3671             cpuflags="-march=$cpu"
3672         ;;
3673         *)
3674             cpuflags="-mcpu=$cpu"
3675         ;;
3676     esac
3677
3678 elif enabled alpha; then
3679
3680     cpuflags="-mcpu=$cpu"
3681
3682 elif enabled arm; then
3683
3684     check_arm_arch() {
3685         check_cpp_condition stddef.h \
3686             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3687             $cpuflags
3688     }
3689
3690     probe_arm_arch() {
3691         if   check_arm_arch 4;        then echo armv4
3692         elif check_arm_arch 4T;       then echo armv4t
3693         elif check_arm_arch 5;        then echo armv5
3694         elif check_arm_arch 5E;       then echo armv5e
3695         elif check_arm_arch 5T;       then echo armv5t
3696         elif check_arm_arch 5TE;      then echo armv5te
3697         elif check_arm_arch 5TEJ;     then echo armv5te
3698         elif check_arm_arch 6;        then echo armv6
3699         elif check_arm_arch 6J;       then echo armv6j
3700         elif check_arm_arch 6K;       then echo armv6k
3701         elif check_arm_arch 6Z;       then echo armv6z
3702         elif check_arm_arch 6ZK;      then echo armv6zk
3703         elif check_arm_arch 6T2;      then echo armv6t2
3704         elif check_arm_arch 7;        then echo armv7
3705         elif check_arm_arch 7A  7_A;  then echo armv7-a
3706         elif check_arm_arch 7S;       then echo armv7-a
3707         elif check_arm_arch 7R  7_R;  then echo armv7-r
3708         elif check_arm_arch 7M  7_M;  then echo armv7-m
3709         elif check_arm_arch 7EM 7E_M; then echo armv7-m
3710         elif check_arm_arch 8A  8_A;  then echo armv8-a
3711         fi
3712     }
3713
3714     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3715
3716     case $cpu in
3717         armv*)
3718             cpuflags="-march=$cpu"
3719             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3720         ;;
3721         *)
3722             cpuflags="-mcpu=$cpu"
3723             case $cpu in
3724                 cortex-a*)                               subarch=armv7a  ;;
3725                 cortex-r*)                               subarch=armv7r  ;;
3726                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3727                 arm11*)                                  subarch=armv6   ;;
3728                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3729                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3730                 *)                             subarch=$(probe_arm_arch) ;;
3731             esac
3732         ;;
3733     esac
3734
3735     case "$subarch" in
3736         armv5t*)    enable fast_clz                ;;
3737         armv[6-8]*) enable fast_clz fast_unaligned ;;
3738     esac
3739
3740 elif enabled avr32; then
3741
3742     case $cpu in
3743         ap7[02]0[0-2])
3744             subarch="avr32_ap"
3745             cpuflags="-mpart=$cpu"
3746         ;;
3747         ap)
3748             subarch="avr32_ap"
3749             cpuflags="-march=$cpu"
3750         ;;
3751         uc3[ab]*)
3752             subarch="avr32_uc"
3753             cpuflags="-mcpu=$cpu"
3754         ;;
3755         uc)
3756             subarch="avr32_uc"
3757             cpuflags="-march=$cpu"
3758         ;;
3759     esac
3760
3761 elif enabled bfin; then
3762
3763     cpuflags="-mcpu=$cpu"
3764
3765 elif enabled mips; then
3766
3767     cpuflags="-march=$cpu"
3768
3769 elif enabled ppc; then
3770
3771     disable ldbrx
3772
3773     case $(tolower $cpu) in
3774         601|ppc601|powerpc601)
3775             cpuflags="-mcpu=601"
3776             disable altivec
3777         ;;
3778         603*|ppc603*|powerpc603*)
3779             cpuflags="-mcpu=603"
3780             disable altivec
3781         ;;
3782         604*|ppc604*|powerpc604*)
3783             cpuflags="-mcpu=604"
3784             disable altivec
3785         ;;
3786         g3|75*|ppc75*|powerpc75*)
3787             cpuflags="-mcpu=750"
3788             disable altivec
3789         ;;
3790         g4|745*|ppc745*|powerpc745*)
3791             cpuflags="-mcpu=7450"
3792             disable vsx
3793         ;;
3794         74*|ppc74*|powerpc74*)
3795             cpuflags="-mcpu=7400"
3796             disable vsx
3797         ;;
3798         g5|970|ppc970|powerpc970)
3799             cpuflags="-mcpu=970"
3800             disable vsx
3801         ;;
3802         power[3-6]*)
3803             cpuflags="-mcpu=$cpu"
3804             disable vsx
3805         ;;
3806         power[7-8]*)
3807             cpuflags="-mcpu=$cpu"
3808             enable ldbrx
3809         ;;
3810         cell)
3811             cpuflags="-mcpu=cell"
3812             enable ldbrx
3813             disable vsx
3814         ;;
3815         e500mc)
3816             cpuflags="-mcpu=e500mc"
3817             disable altivec
3818         ;;
3819         e500v2)
3820             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3821             disable altivec
3822             disable dcbzl
3823         ;;
3824         e500)
3825             cpuflags="-mcpu=8540 -mhard-float"
3826             disable altivec
3827             disable dcbzl
3828         ;;
3829     esac
3830
3831 elif enabled sparc; then
3832
3833     case $cpu in
3834         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3835             cpuflags="-mcpu=$cpu"
3836         ;;
3837         ultrasparc*|niagara[234])
3838             cpuflags="-mcpu=$cpu"
3839         ;;
3840     esac
3841
3842 elif enabled x86; then
3843
3844     case $cpu in
3845         i[345]86|pentium)
3846             cpuflags="-march=$cpu"
3847             disable i686
3848             disable mmx
3849         ;;
3850         # targets that do NOT support nopl and conditional mov (cmov)
3851         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3852             cpuflags="-march=$cpu"
3853             disable i686
3854         ;;
3855         # targets that do support nopl and conditional mov (cmov)
3856         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3857             cpuflags="-march=$cpu"
3858             enable i686
3859             enable fast_cmov
3860         ;;
3861         # targets that do support conditional mov but on which it's slow
3862         pentium4|pentium4m|prescott|nocona)
3863             cpuflags="-march=$cpu"
3864             enable i686
3865             disable fast_cmov
3866         ;;
3867     esac
3868
3869 fi
3870
3871 if [ "$cpu" != generic ]; then
3872     add_cflags  $cpuflags
3873     add_asflags $cpuflags
3874     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3875 fi
3876
3877 # compiler sanity check
3878 check_exec <<EOF
3879 int main(void){ return 0; }
3880 EOF
3881 if test "$?" != 0; then
3882     echo "$cc is unable to create an executable file."
3883     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3884         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3885         echo "Only do this if you know what cross compiling means."
3886     fi
3887     die "C compiler test failed."
3888 fi
3889
3890 add_cppflags -D_ISOC99_SOURCE
3891
3892 # some compilers silently accept -std=c11, so we also need to check that the
3893 # version macro is defined properly
3894 check_cpp_condition stdlib.h  "__STDC_VERSION__ >= 201112L" -std=c11 &&
3895     add_cflags -std=c11 ||
3896     check_cflags -std=c99
3897
3898 check_cppflags -D_FILE_OFFSET_BITS=64
3899 check_cppflags -D_LARGEFILE_SOURCE
3900
3901 add_host_cppflags -D_ISOC99_SOURCE
3902 check_host_cflags -std=c99
3903 check_host_cflags -Wall
3904 check_host_cflags $host_cflags_speed
3905
3906 check_64bit(){
3907     arch32=$1
3908     arch64=$2
3909     expr=$3
3910     check_code cc "" "int test[2*($expr) - 1]" &&
3911         subarch=$arch64 || subarch=$arch32
3912 }
3913
3914 case "$arch" in
3915     aarch64|alpha|ia64)
3916         spic=$shared
3917     ;;
3918     mips)
3919         check_64bit mips mips64 '_MIPS_SIM > 1'
3920         spic=$shared
3921     ;;
3922     parisc)
3923         check_64bit parisc parisc64 'sizeof(void *) > 4'
3924         spic=$shared
3925     ;;
3926     ppc)
3927         check_64bit ppc ppc64 'sizeof(void *) > 4'
3928         spic=$shared
3929     ;;
3930     s390)
3931         check_64bit s390 s390x 'sizeof(void *) > 4'
3932         spic=$shared
3933     ;;
3934     sparc)
3935         check_64bit sparc sparc64 'sizeof(void *) > 4'
3936         spic=$shared
3937     ;;
3938     x86)
3939         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3940         if test "$subarch" = "x86_64"; then
3941             spic=$shared
3942         fi
3943     ;;
3944 esac
3945
3946 enable $subarch
3947 enabled spic && enable_weak pic
3948
3949 enabled x86_64 && objformat=elf64 || objformat="elf32"
3950
3951 # OS specific
3952 case $target_os in
3953     aix)
3954         SHFLAGS=-shared
3955         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3956         enabled shared && add_ldflags -Wl,-brtl
3957         ;;
3958     android)
3959         disable symver
3960         enable section_data_rel_ro
3961         SLIB_INSTALL_NAME='$(SLIBNAME)'
3962         SLIB_INSTALL_LINKS=
3963         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3964         ;;
3965     haiku)
3966         prefix_default="/boot/common"
3967         network_extralibs="-lnetwork"
3968         host_extralibs=
3969         ;;
3970     sunos)
3971         SHFLAGS='-shared -Wl,-h,$$(@F)'
3972         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3973         network_extralibs="-lsocket -lnsl"
3974         # When using suncc to build, the Solaris linker will mark
3975         # an executable with each instruction set encountered by
3976         # the Solaris assembler.  As our libraries contain their own
3977         # guards for processor-specific code, instead suppress
3978         # generation of the HWCAPS ELF section on Solaris x86 only.
3979         enabled_all suncc x86 &&
3980             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3981             add_ldflags -Wl,-M,mapfile
3982         nm_default='nm -P -g'
3983         version_script='-M'
3984         VERSION_SCRIPT_POSTPROCESS_CMD='perl $(SRC_PATH)/compat/solaris/make_sunver.pl - $(OBJS)'
3985         ;;
3986     netbsd)
3987         disable symver
3988         oss_indev_extralibs="-lossaudio"
3989         oss_outdev_extralibs="-lossaudio"
3990         ;;
3991     openbsd|bitrig)
3992         disable symver
3993         SHFLAGS='-shared'
3994         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3995         SLIB_INSTALL_LINKS=
3996         oss_indev_extralibs="-lossaudio"
3997         oss_outdev_extralibs="-lossaudio"
3998         ;;
3999     dragonfly)
4000         disable symver
4001         ;;
4002     freebsd)
4003         ;;
4004     bsd/os)
4005         add_extralibs -lpoll -lgnugetopt
4006         ;;
4007     darwin)
4008         enabled ppc && add_asflags -force_cpusubtype_ALL
4009         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
4010         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
4011         add_ldflags -Wl,-dynamic,-search_paths_first
4012         check_cflags -Werror=partial-availability
4013         SLIBSUF=".dylib"
4014         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME).$(LIBVERSION)$(SLIBSUF)'
4015         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME).$(LIBMAJOR)$(SLIBSUF)'
4016         enabled x86_64 && objformat="macho64" || objformat="macho32"
4017         enabled_any pic shared ||
4018             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
4019         check_header dispatch/dispatch.h &&
4020             add_cppflags '-I\$(SRC_PATH)/compat/dispatch_semaphore'
4021         if test -n "$sysroot"; then
4022             is_in -isysroot $cc $CPPFLAGS $CFLAGS || check_cppflags -isysroot $sysroot
4023             is_in -isysroot $ld $LDFLAGS          || check_ldflags  -isysroot $sysroot
4024         fi
4025         ;;
4026     msys*)
4027         die "Native MSYS builds are discouraged, please use the MINGW environment."
4028         ;;
4029     mingw32*|mingw64*)
4030         target_os=mingw32
4031         LIBTARGET=i386
4032         if enabled x86_64; then
4033             LIBTARGET="i386:x86-64"
4034         fi
4035         if enabled shared; then
4036             # Cannot build both shared and static libs when using dllexport.
4037             disable static
4038         fi
4039         check_ldflags -Wl,--nxcompat
4040         check_ldflags -Wl,--dynamicbase
4041         shlibdir_default="$bindir_default"
4042         SLIBPREF=""
4043         SLIBSUF=".dll"
4044         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
4045         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
4046         SLIB_EXTRA_CMD=-'$(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
4047         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4048         SLIB_INSTALL_LINKS=
4049         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
4050         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
4051         SLIB_CREATE_DEF_CMD='ARCH="$(ARCH)" AR="$(AR_CMD)" NM="$(NM_CMD)" $(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
4052         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-auto-image-base $$(@:$(SLIBSUF)=.def)'
4053         enabled x86_64 && objformat="win64" || objformat="win32"
4054         dlltool="${cross_prefix}dlltool"
4055         ranlib=:
4056         enable dos_paths
4057         ;;
4058     win32|win64)
4059         disable symver
4060         if enabled shared; then
4061             # Link to the import library instead of the normal static library
4062             # for shared libs.
4063             LD_LIB='%.lib'
4064             # Cannot build both shared and static libs with MSVC or icl.
4065             disable static
4066         fi
4067         shlibdir_default="$bindir_default"
4068         SLIBPREF=""
4069         SLIBSUF=".dll"
4070         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
4071         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
4072         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
4073         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4074         SLIB_INSTALL_LINKS=
4075         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
4076         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
4077         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
4078         enabled x86_64 && objformat="win64" || objformat="win32"
4079         ranlib=:
4080         enable dos_paths
4081         ;;
4082     cygwin*)
4083         target_os=cygwin
4084         shlibdir_default="$bindir_default"
4085         SLIBPREF="cyg"
4086         SLIBSUF=".dll"
4087         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
4088         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
4089         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4090         SLIB_INSTALL_LINKS=
4091         SLIB_INSTALL_EXTRA_LIB='lib$(NAME).dll.a'
4092         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(NAME).dll.a'
4093         enabled x86_64 && objformat="win64" || objformat="win32"
4094         enable dos_paths
4095         ;;
4096     *-dos|freedos|opendos)
4097         network_extralibs="-lsocket"
4098         objformat="coff"
4099         enable dos_paths
4100         add_cppflags -U__STRICT_ANSI__
4101         ;;
4102     linux)
4103         enable dv1394
4104         enable section_data_rel_ro
4105         ;;
4106     irix*)
4107         target_os=irix
4108         ranlib="echo ignoring ranlib"
4109         ;;
4110     os/2*)
4111         ln_s="cp -f"
4112         objformat="aout"
4113         add_cppflags -D_GNU_SOURCE
4114         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zhigh-mem -Zmap
4115         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
4116         LIBSUF="_s.a"
4117         SLIBPREF=""
4118         SLIBSUF=".dll"
4119         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
4120         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
4121         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
4122             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
4123             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
4124             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
4125             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
4126         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
4127             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
4128         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
4129         enable dos_paths
4130         ;;
4131     gnu/kfreebsd)
4132         add_cppflags -D_BSD_SOURCE
4133         ;;
4134     gnu)
4135         ;;
4136     qnx)
4137         add_cppflags -D_QNX_SOURCE
4138         network_extralibs="-lsocket"
4139         ;;
4140     symbian)
4141         SLIBSUF=".dll"
4142         enable dos_paths
4143         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
4144         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
4145         add_ldflags -Wl,--target1-abs,--no-undefined \
4146                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
4147                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
4148         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
4149                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
4150                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
4151         ;;
4152     osf1)
4153         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
4154         ;;
4155     minix)
4156         ;;
4157     none)
4158         ;;
4159     *)
4160         die "Unknown OS '$target_os'."
4161         ;;
4162 esac
4163
4164 # determine libc flavour
4165
4166 probe_libc(){
4167     pfx=$1
4168     pfx_no_=${pfx%_}
4169     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
4170     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
4171         eval ${pfx}libc_type=uclibc
4172         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4173     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
4174         eval ${pfx}libc_type=glibc
4175         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4176     # MinGW headers can be installed on Cygwin, so check for newlib first.
4177     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
4178         eval ${pfx}libc_type=newlib
4179         add_${pfx}cppflags -U__STRICT_ANSI__ -D_XOPEN_SOURCE=600
4180     # MinGW64 is backwards compatible with MinGW32, so check for it first.
4181     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
4182         eval ${pfx}libc_type=mingw64
4183         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4184         eval test \$${pfx_no_}cc_type = "gcc" &&
4185             add_${pfx}cppflags -D__printf__=__gnu_printf__
4186     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
4187          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
4188         eval ${pfx}libc_type=mingw32
4189         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
4190             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
4191             die "ERROR: MinGW32 runtime version must be >= 3.15."
4192         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4193         check_${pfx}cpp_condition _mingw.h "__MSVCRT_VERSION__ < 0x0700" &&
4194             add_${pfx}cppflags -D__MSVCRT_VERSION__=0x0700
4195         check_${pfx}cpp_condition windows.h "defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0502" &&
4196             add_${pfx}cppflags -D_WIN32_WINNT=0x0502
4197         eval test \$${pfx_no_}cc_type = "gcc" &&
4198             add_${pfx}cppflags -D__printf__=__gnu_printf__
4199     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
4200         eval ${pfx}libc_type=msvcrt
4201         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
4202             if [ "$pfx" = host_ ]; then
4203                 add_host_cppflags -Dsnprintf=_snprintf
4204             else
4205                 add_compat strtod.o strtod=avpriv_strtod
4206                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
4207                                              _snprintf=avpriv_snprintf  \
4208                                              vsnprintf=avpriv_vsnprintf
4209             fi
4210         fi
4211         add_${pfx}cppflags -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS
4212         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
4213         # 0x601 by default unless something else is set by the user.
4214         # This can easily lead to us detecting functions only present
4215         # in such new versions and producing binaries requiring windows 7.0.
4216         # Therefore explicitly set the default to XP unless the user has
4217         # set something else on the command line.
4218         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
4219         # family. For these cases, configure is free to use any functions
4220         # found in the SDK headers by default. (Alternatively, we could force
4221         # _WIN32_WINNT to 0x0602 in that case.)
4222         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
4223             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
4224 #ifdef WINAPI_FAMILY
4225 #include <winapifamily.h>
4226 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4227 #error not desktop
4228 #endif
4229 #endif
4230 EOF
4231         if [ "$pfx" = "" ]; then
4232             check_func strtoll || add_cflags -Dstrtoll=_strtoi64
4233         fi
4234     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4235         eval ${pfx}libc_type=klibc
4236     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4237         eval ${pfx}libc_type=bionic
4238     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4239         eval ${pfx}libc_type=solaris
4240         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4241     else
4242         eval ${pfx}libc_type=default
4243         add_${pfx}cppflags -D_DEFAULT_SOURCE
4244     fi
4245 }
4246
4247 probe_libc
4248 test -n "$libc_type" && enable libc_$libc_type
4249 probe_libc host_
4250 test -n "$host_libc_type" && enable host_libc_$host_libc_type
4251
4252 # hacks for compiler/libc/os combinations
4253
4254 case $libc_type in
4255     bionic)
4256         add_compat strtod.o strtod=avpriv_strtod
4257         ;;
4258     glibc)
4259         if enabled tms470; then
4260             CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4261             add_cppflags -D__USER_LABEL_PREFIX__=
4262             add_cppflags -D__builtin_memset=memset
4263             add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4264             add_cflags   -pds=48    # incompatible redefinition of macro
4265         elif enabled ccc; then
4266             add_ldflags -Wl,-z,now  # calls to libots crash without this
4267         fi
4268         ;;
4269 esac
4270
4271 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4272     add_cppflags '-I\$(SRC_PATH)/compat/float'
4273
4274 esc(){
4275     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4276 }
4277
4278 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" > avbuild/config.fate
4279
4280 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4281
4282 set_default $PATHS_LIST
4283 set_default nm
4284
4285 # we need to build at least one lib type
4286 if ! enabled_any static shared; then
4287     cat <<EOF
4288 At least one library type must be built.
4289 Specify --enable-static to build the static libraries or --enable-shared to
4290 build the shared libraries as well. To only build the shared libraries specify
4291 --disable-static in addition to --enable-shared.
4292 EOF
4293     exit 1
4294 fi
4295
4296 disabled optimizations || check_cflags -fomit-frame-pointer
4297
4298 enable_weak_pic() {
4299     disabled pic && return
4300     enable pic
4301     add_cppflags -DPIC
4302     case "$target_os" in
4303     mingw*|cygwin*)
4304         ;;
4305     *)
4306         add_cflags -fPIC
4307         ;;
4308     esac
4309     add_asflags  -fPIC
4310 }
4311
4312 enabled pic && enable_weak_pic
4313
4314 check_cc <<EOF || die "Symbol mangling check failed."
4315 int ff_extern;
4316 EOF
4317 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4318 extern_prefix=${sym%%ff_extern*}
4319
4320 ! disabled inline_asm && check_inline_asm inline_asm '"" ::'
4321
4322 _restrict=
4323 for restrict_keyword in restrict __restrict__ __restrict; do
4324     check_cc <<EOF && _restrict=$restrict_keyword && break
4325 void foo(char * $restrict_keyword p);
4326 EOF
4327 done
4328
4329 check_cc <<EOF && enable pragma_deprecated
4330 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4331 EOF
4332
4333 check_cc <<EOF && enable attribute_packed
4334 struct { int x; } __attribute__((packed)) x;
4335 EOF
4336
4337 check_cc <<EOF && enable attribute_may_alias
4338 union { int x; } __attribute__((may_alias)) x;
4339 EOF
4340
4341 check_cc <<EOF || die "endian test failed"
4342 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4343 EOF
4344 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4345
4346 check_gas() {
4347     log "check_gas using '$as' as AS"
4348     # :vararg is used on aarch64, arm and ppc altivec
4349     check_as <<EOF || return 1
4350 .macro m n, y:vararg=0
4351 \n: .int \y
4352 .endm
4353 m x
4354 EOF
4355     # .altmacro is only used in arm asm
4356     ! enabled arm || check_as <<EOF || return 1
4357 .altmacro
4358 EOF
4359     enable gnu_as
4360     return 0
4361 }
4362
4363 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4364     nogas=:
4365     enabled_any arm aarch64 && nogas=die
4366     enabled_all ppc altivec && nogas=warn
4367     as_noop=-v
4368
4369     case $as_type in
4370         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4371         gcc)  gaspp_as_type=gas ;;
4372         *)    gaspp_as_type=$as_type ;;
4373     esac
4374
4375     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4376
4377     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4378         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4379
4380     if ! check_gas ; then
4381         as=${gas:=$as}
4382         check_gas || \
4383             $nogas "GNU assembler not found, install/update gas-preprocessor"
4384     fi
4385
4386     check_as <<EOF && enable as_func
4387 .func test
4388 .endfunc
4389 EOF
4390 fi
4391
4392 check_inline_asm inline_asm_labels '"1:\n"'
4393
4394 if enabled aarch64; then
4395     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4396     # internal assembler in clang 3.3 does not support this instruction
4397     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4398     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4399
4400     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4401
4402 elif enabled alpha; then
4403
4404     check_cflags -mieee
4405
4406 elif enabled arm; then
4407
4408     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4409     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4410     enabled thumb && check_cflags -mthumb || check_cflags -marm
4411
4412     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4413         enable vfp_args
4414     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4415         enable vfp_args
4416     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4417         case "${cross_prefix:-$cc}" in
4418             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4419             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4420 __asm__ (".eabi_attribute 28, 1");
4421 int main(void) { return 0; }
4422 EOF
4423         esac
4424         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4425     fi
4426
4427     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4428     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4429     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4430     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4431     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4432     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4433
4434     [ $target_os = linux ] || [ $target_os = android ] ||
4435         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4436             $ARCH_EXT_LIST_ARM
4437
4438     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4439
4440     check_as <<EOF && enable as_arch_directive
4441 .arch armv7-a
4442 EOF
4443     check_as <<EOF && enable as_fpu_directive
4444 .fpu neon
4445 EOF
4446
4447     # llvm's integrated assembler supports .object_arch from llvm 3.5
4448     [ "$objformat" = elf32 ] || [ "$objformat" = elf64 ] &&
4449         check_as <<EOF && enable as_object_arch
4450 .object_arch armv4
4451 EOF
4452
4453     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4454
4455 elif enabled mips; then
4456
4457     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4458
4459     # make sure that only an instruction set is enabled
4460     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4461
4462     if enabled mips64; then
4463         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4464             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4465                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4466     else
4467         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4468             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4469                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4470     fi
4471
4472 elif enabled parisc; then
4473
4474     if enabled gcc; then
4475         case $($cc -dumpversion) in
4476             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4477         esac
4478     fi
4479
4480 elif enabled ppc; then
4481
4482     enable local_aligned_8 local_aligned_16 local_aligned_32
4483
4484     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4485     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4486     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4487     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4488
4489     if enabled altivec; then
4490         check_cflags -maltivec -mabi=altivec
4491
4492         # check if our compiler supports Motorola AltiVec C API
4493         check_code cc altivec.h "vector signed int v1 = (vector signed int) { 0 };
4494                                  vector signed int v2 = (vector signed int) { 1 };
4495                                  v1 = vec_add(v1, v2);" ||
4496             disable altivec
4497
4498         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4499     fi
4500
4501     if enabled vsx; then
4502         check_cflags -mvsx &&
4503         check_code cc altivec.h "int v[4] = { 0 };
4504                                  vector signed int v1 = vec_vsx_ld(0, v);" ||
4505             disable vsx
4506     fi
4507
4508     if enabled power8; then
4509         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4510     fi
4511
4512 elif enabled x86; then
4513
4514     check_builtin rdtsc    intrin.h   "__rdtsc()"
4515     check_builtin mm_empty mmintrin.h "_mm_empty()"
4516
4517     enable local_aligned_8 local_aligned_16 local_aligned_32
4518
4519     # check whether EBP is available on x86
4520     # As 'i' is stored on the stack, this program will crash
4521     # if the base pointer is used to access it because the
4522     # base pointer is cleared in the inline assembly code.
4523     check_exec_crash <<EOF && enable ebp_available
4524 volatile int i=0;
4525 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4526 return i;
4527 EOF
4528
4529     # check whether EBX is available on x86
4530     check_inline_asm ebx_available '""::"b"(0)' &&
4531         check_inline_asm ebx_available '"":::"%ebx"'
4532
4533     # check whether xmm clobbers are supported
4534     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4535
4536     # check whether binutils is new enough to compile SSSE3/MMXEXT
4537     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4538     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4539
4540     probe_x86asm(){
4541         x86asmexe_probe=$1
4542         if check_cmd $x86asmexe_probe -v; then
4543             x86asmexe=$x86asmexe_probe
4544             x86asm_type=nasm
4545             x86asm_debug="-g -F dwarf"
4546             X86ASMDEP=
4547             X86ASM_DEPFLAGS='-MD $(@:.o=.d)'
4548         elif check_cmd $x86asmexe_probe --version; then
4549             x86asmexe=$x86asmexe_probe
4550             x86asm_type=yasm
4551             x86asm_debug="-g dwarf2"
4552             X86ASMDEP='$(DEPX86ASM) $(X86ASMFLAGS) -M $(X86ASM_O) $< > $(@:.o=.d)'
4553             X86ASM_DEPFLAGS=
4554         fi
4555         check_x86asm "movbe ecx, [5]" && enable x86asm
4556     }
4557
4558     if ! disabled_any asm mmx x86asm; then
4559         disable x86asm
4560         for program in $x86asmexe nasm yasm; do
4561             probe_x86asm $program && break
4562         done
4563         disabled x86asm && die "nasm/yasm not found or too old. Use --disable-x86asm for a crippled build."
4564         X86ASMFLAGS="-f $objformat"
4565         enabled pic               && append X86ASMFLAGS "-DPIC"
4566         test -n "$extern_prefix"  && append X86ASMFLAGS "-DPREFIX"
4567         case "$objformat" in
4568             elf*) enabled debug && append X86ASMFLAGS $x86asm_debug ;;
4569         esac
4570
4571         check_x86asm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4572         check_x86asm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4573         check_x86asm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4574         check_x86asm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4575         check_x86asm "CPU amdnop"                      || disable cpunop
4576     fi
4577
4578     case "$cpu" in
4579         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4580             disable fast_clz
4581         ;;
4582     esac
4583
4584 fi
4585
4586 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4587
4588 check_ldflags -Wl,--as-needed
4589
4590 if ! disabled network; then
4591     check_func getaddrinfo $network_extralibs
4592     check_func inet_aton $network_extralibs
4593
4594     check_type netdb.h "struct addrinfo"
4595     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4596     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4597     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4598     check_type poll.h "struct pollfd"
4599     check_type netinet/sctp.h "struct sctp_event_subscribe"
4600     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4601     check_type netinet/in.h "struct sockaddr_in6"
4602     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4603     check_type "sys/types.h sys/socket.h" socklen_t
4604
4605     # Prefer arpa/inet.h over winsock2
4606     if check_header arpa/inet.h ; then
4607         check_func closesocket
4608     elif check_header winsock2.h ; then
4609         check_func_headers winsock2.h closesocket -lws2 &&
4610             network_extralibs="-lws2" ||
4611         { check_func_headers winsock2.h closesocket -lws2_32 &&
4612             network_extralibs="-lws2_32"; } || disable winsock2_h network
4613         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4614
4615         check_type ws2tcpip.h socklen_t
4616         check_type ws2tcpip.h "struct addrinfo"
4617         check_type ws2tcpip.h "struct group_source_req"
4618         check_type ws2tcpip.h "struct ip_mreq_source"
4619         check_type ws2tcpip.h "struct ipv6_mreq"
4620         check_type winsock2.h "struct pollfd"
4621         check_struct winsock2.h "struct sockaddr" sa_len
4622         check_type ws2tcpip.h "struct sockaddr_in6"
4623         check_type ws2tcpip.h "struct sockaddr_storage"
4624     else
4625         disable network
4626     fi
4627 fi
4628
4629 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4630 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4631 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4632 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4633
4634 case "$custom_allocator" in
4635     jemalloc)
4636         # jemalloc by default does not use a prefix
4637         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4638     ;;
4639     tcmalloc)
4640         require_pkg_config libtcmalloc libtcmalloc gperftools/tcmalloc.h tc_malloc
4641         malloc_prefix=tc_
4642     ;;
4643 esac
4644
4645 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4646 check_func  ${malloc_prefix}memalign            && enable memalign
4647 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4648
4649 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4650     { check_lib clock_gettime time.h clock_gettime ||
4651       check_lib clock_gettime time.h clock_gettime -lrt; }
4652
4653 check_func  fcntl
4654 check_func  fork
4655 check_func  gethrtime
4656 check_func  getopt
4657 check_func  getrusage
4658 check_func  gettimeofday
4659 check_func  gmtime_r
4660 check_func  isatty
4661 check_func  localtime_r
4662 check_func  mach_absolute_time
4663 check_func  mkstemp
4664 check_func  mmap
4665 check_func  mprotect
4666 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4667 check_func_headers time.h nanosleep || check_lib nanosleep time.h nanosleep -lrt
4668 check_func  sched_getaffinity
4669 check_func  setrlimit
4670 check_func  strerror_r
4671 check_func  sysconf
4672 check_func  sysctl
4673 check_func  usleep
4674
4675 check_func_headers io.h setmode
4676 check_func_headers stdlib.h getenv
4677
4678 check_func_headers windows.h GetProcessAffinityMask
4679 check_func_headers windows.h GetProcessTimes
4680 check_func_headers windows.h GetSystemTimeAsFileTime
4681 check_func_headers windows.h LoadLibrary
4682 check_func_headers windows.h MapViewOfFile
4683 check_func_headers windows.h SetConsoleTextAttribute
4684 check_func_headers windows.h Sleep
4685 check_func_headers windows.h VirtualAlloc
4686 check_struct windows.h "CONDITION_VARIABLE" Ptr
4687
4688 check_header d3d11.h
4689 check_header direct.h
4690 check_header dlfcn.h
4691 check_header dxgidebug.h
4692 check_header dxva.h
4693 check_header dxva2api.h
4694 check_header io.h
4695 check_header mach/mach_time.h
4696 check_header malloc.h
4697 check_header poll.h
4698 check_header sys/mman.h
4699 check_header sys/param.h
4700 check_header sys/resource.h
4701 check_header sys/select.h
4702 check_header sys/time.h
4703 check_header sys/un.h
4704 check_header unistd.h
4705 check_header valgrind/valgrind.h
4706 check_header VideoDecodeAcceleration/VDADecoder.h
4707 check_header windows.h
4708
4709 # it seems there are versions of clang in some distros that try to use the
4710 # gcc headers, which explodes for stdatomic
4711 # so we also check that atomics actually work here
4712 check_builtin stdatomic_h stdatomic.h "atomic_int foo; atomic_store(&foo, 0)"
4713
4714 check_lib ole32    "windows.h"            CoTaskMemFree        -lole32
4715 check_lib shell32  "windows.h shellapi.h" CommandLineToArgvW   -lshell32
4716 check_lib wincrypt "windows.h wincrypt.h" CryptGenRandom       -ladvapi32
4717 check_lib psapi    "windows.h psapi.h"    GetProcessMemoryInfo -lpsapi
4718
4719 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4720
4721 check_type "cuviddec.h" "CUVIDH264PICPARAMS"
4722 check_type "cuviddec.h" "CUVIDHEVCPICPARAMS"
4723 check_struct "cuviddec.h" "CUVIDDECODECREATEINFO" bitDepthMinus8
4724
4725 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4726 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4727 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4728
4729 check_type "va/va.h va/va_dec_hevc.h" "VAPictureParameterBufferHEVC"
4730 check_type "va/va.h va/va_dec_vp8.h" "VAPictureParameterBufferVP8"
4731 check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
4732 check_type "va/va.h va/va_enc_h264.h" "VAEncPictureParameterBufferH264"
4733 check_type "va/va.h va/va_enc_hevc.h" "VAEncPictureParameterBufferHEVC"
4734 check_type "va/va.h va/va_enc_jpeg.h" "VAEncPictureParameterBufferJPEG"
4735 check_type "va/va.h va/va_enc_mpeg2.h" "VAEncPictureParameterBufferMPEG2"
4736 check_type "va/va.h va/va_enc_vp8.h"  "VAEncPictureParameterBufferVP8"
4737 check_type "va/va.h va/va_enc_vp9.h"  "VAEncPictureParameterBufferVP9"
4738
4739 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4740
4741 if ! disabled w32threads && ! enabled pthreads; then
4742     check_lib w32threads "windows.h process.h" _beginthreadex
4743 fi
4744
4745 # check for some common methods of building with pthread support
4746 # do this before the optional library checks as some of them require pthreads
4747 if ! disabled pthreads && ! enabled w32threads; then
4748     if check_lib pthreads pthread.h pthread_join -pthread; then
4749         add_cflags -pthread
4750     elif check_lib pthreads pthread.h pthread_join -pthreads; then
4751         add_cflags -pthreads
4752     elif check_lib pthreads pthread.h pthread_join -lpthreadGC2; then
4753         :
4754     elif check_lib pthreads pthread.h pthread_join -lpthread; then
4755         :
4756     elif check_func pthread_join; then
4757         enable pthreads
4758     fi
4759 fi
4760
4761 enabled pthreads &&
4762     check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwait(s,0); sem_destroy(s)" $pthreads_extralibs
4763
4764 disabled  zlib || check_lib  zlib  zlib.h      zlibVersion -lz
4765 disabled bzlib || check_lib bzlib bzlib.h BZ2_bzlibVersion -lbz2
4766
4767 # On some systems dynamic loading requires no extra linker flags
4768 check_lib libdl dlfcn.h dlopen || check_lib libdl dlfcn.h dlopen -ldl
4769
4770 check_lib libm math.h sin -lm
4771
4772 atan2f_args=2
4773 ldexpf_args=2
4774 powf_args=2
4775
4776 for func in $MATH_FUNCS; do
4777     eval check_mathfunc $func \${${func}_args:-1} $libm_extralibs
4778 done
4779
4780 # these are off by default, so fail if requested and not available
4781 enabled avisynth          && require_header avisynth/avisynth_c.h
4782 enabled avxsynth          && require_header avxsynth/avxsynth_c.h
4783 enabled cuda              && require cuda cuda.h cuInit -lcuda
4784 enabled cuvid             && require cuvid cuviddec.h cuvidCreateDecoder -lnvcuvid
4785 enabled frei0r            && require_header frei0r.h
4786 enabled gnutls            && require_pkg_config gnutls gnutls gnutls/gnutls.h gnutls_global_init
4787 enabled libbs2b           && require_pkg_config libbs2b libbs2b bs2b.h bs2b_open
4788 enabled libdc1394         && require_pkg_config libdc1394 libdc1394-2 dc1394/dc1394.h dc1394_new
4789 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4790 enabled libfaac           && require libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4791 enabled libfdk_aac        && require_pkg_config libfdk_aac fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4792 enabled libfontconfig     && require_pkg_config libfontconfig fontconfig "fontconfig/fontconfig.h" FcInit
4793 enabled libfreetype       && require_pkg_config libfreetype freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4794 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4795                                    check_lib libgsm "${gsm_hdr}" gsm_create -lgsm && break;
4796                                done || die "ERROR: libgsm not found"; }
4797 enabled libhdcd           && require_pkg_config libhdcd libhdcd "hdcd/hdcd_simple.h" hdcd_new
4798 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4799 enabled libkvazaar        && require_pkg_config libkvazaar "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4800 enabled libmfx            && require_pkg_config libmfx libmfx "mfx/mfxvideo.h" MFXInit
4801 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4802 enabled libnpp            && require libnpp npp.h nppGetLibVersion -lnppi -lnppc
4803 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4804 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4805 enabled libopencv         && require_pkg_config libopencv opencv opencv/cv.h cvCreateImageHeader
4806 enabled libopenh264       && require_pkg_config libopenh264 openh264 wels/codec_api.h WelsGetCodecVersion
4807 enabled libopenjpeg       && { check_lib libopenjpeg openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC ||
4808                                require_pkg_config libopenjpeg libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; }
4809 enabled libopus           && require_pkg_config libopus opus opus_multistream.h opus_multistream_decoder_create
4810 enabled libpulse          && require_pkg_config libpulse libpulse-simple pulse/simple.h pa_simple_new
4811 enabled librtmp           && require_pkg_config librtmp librtmp librtmp/rtmp.h RTMP_Socket
4812 enabled libschroedinger   && require_pkg_config libschroedinger schroedinger-1.0 schroedinger/schro.h schro_init
4813 enabled libsnappy         && require libsnappy snappy-c.h snappy_compress -lsnappy
4814 enabled libspeex          && require_pkg_config libspeex speex speex/speex.h speex_decoder_init -lspeex
4815 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4816 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4817 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4818 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4819 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4820 enabled libvpx            && require_pkg_config libvpx "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version &&
4821                              { enabled libvpx_vp8_decoder &&
4822                                    check_pkg_config libvpx_vp8_decoder vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx
4823                                enabled libvpx_vp8_encoder &&
4824                                    check_pkg_config libvpx_vp8_encoder vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx
4825                                enabled libvpx_vp9_decoder &&
4826                                    check_pkg_config libvpx_vp9_decoder vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx
4827                                enabled libvpx_vp9_encoder &&
4828                                    check_pkg_config libvpx_vp9_encoder vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx
4829                                disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder &&
4830                                    die "libvpx enabled but no supported decoders/encoders found"
4831                              }
4832 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4833 enabled libwebp           && require_pkg_config libwebp libwebp webp/encode.h WebPGetEncoderVersion
4834 enabled libx264           && require_pkg_config libx264 x264 "stdint.h x264.h" x264_encoder_encode &&
4835                              require_cpp_condition x264.h "X264_BUILD >= 118" &&
4836                              { check_cpp_condition x264.h "X264_MPEG2" &&
4837                                enable libx262; }
4838 enabled libx265           && require_pkg_config libx265 x265 x265.h x265_api_get &&
4839                              require_cpp_condition x265.h "X265_BUILD >= 57"
4840 enabled libxavs           && require libxavs "stdint.h xavs.h" xavs_encoder_encode -lxavs
4841 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4842 enabled mmal              && { check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4843                                { ! enabled cross_compile &&
4844                                  add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline &&
4845                                  add_ldflags -L/opt/vc/lib/ &&
4846                                  check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host; } ||
4847                                die "ERROR: mmal not found" &&
4848                                check_func_headers interface/mmal/mmal.h "MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS"; }
4849 enabled omx               && require_header OMX_Core.h
4850 enabled omx_rpi           && { check_header OMX_Core.h ||
4851                                { ! enabled cross_compile && add_cflags -isystem/opt/vc/include/IL && check_header OMX_Core.h ; } ||
4852                                die "ERROR: OpenMAX IL headers not found"; } && enable omx
4853 enabled openssl           && { { check_pkg_config openssl openssl openssl/ssl.h OPENSSL_init_ssl ||
4854                                  check_pkg_config openssl openssl openssl/ssl.h SSL_library_init; } ||
4855                                check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4856                                check_lib openssl openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4857                                check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4858                                die "ERROR: openssl not found"; }
4859
4860 enabled gnutls            && check_lib gmp gmp.h mpz_export -lgmp
4861
4862 if enabled nvenc; then
4863     require_header nvEncodeAPI.h
4864     require_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 6"
4865 fi
4866
4867 # SDL is "special" and adds some CFLAGS that should not pollute anything else.
4868 if enabled avplay; then
4869     CFLAGS_SAVE=$CFLAGS
4870     check_pkg_config sdl "sdl >= 1.2.1 sdl < 1.3.0" SDL_events.h SDL_PollEvent &&
4871     sdl_cflags=$pkg_cflags
4872     CFLAGS=$CFLAGS_SAVE
4873 fi
4874
4875 ! disabled pod2man   && check_cmd pod2man --help     && enable pod2man   || disable pod2man
4876 ! disabled texi2html && check_cmd texi2html -version && enable texi2html || disable texi2html
4877
4878 check_header linux/fb.h
4879 check_header linux/videodev2.h
4880 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4881
4882 check_header AVFoundation/AVFoundation.h
4883
4884 check_header sys/videoio.h
4885
4886 check_lib user32 "windows.h winuser.h" GetShellWindow -luser32
4887 check_lib vfw32 "windows.h vfw.h" capCreateCaptureWindow -lvfw32
4888 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4889 # w32api 3.12 had it defined wrong
4890 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4891
4892 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4893 { check_header dev/bktr/ioctl_meteor.h &&
4894   check_header dev/bktr/ioctl_bt848.h; } ||
4895 { check_header machine/ioctl_meteor.h &&
4896   check_header machine/ioctl_bt848.h; } ||
4897 { check_header dev/video/meteor/ioctl_meteor.h &&
4898   check_header dev/video/bktr/ioctl_bt848.h; } ||
4899 check_header dev/ic/bt8xx.h
4900
4901 check_header sys/soundcard.h
4902 check_header soundcard.h
4903
4904 enabled_any alsa_indev alsa_outdev &&
4905     check_lib alsa alsa/asoundlib.h snd_pcm_htimestamp -lasound
4906
4907 enabled libjack &&
4908     require_pkg_config libjack jack jack/jack.h jack_port_get_latency_range
4909
4910 enabled_any sndio_indev sndio_outdev && check_lib sndio sndio.h sio_open -lsndio
4911
4912 if enabled libcdio; then
4913     check_lib libcdio "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4914     check_lib libcdio "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4915     die "ERROR: No usable libcdio/cdparanoia found"
4916 fi
4917
4918 if enabled libxcb; then
4919     require_pkg_config libxcb xcb xcb/xcb.h xcb_connect
4920     require_pkg_config libxcb_shape xcb-shape xcb/shape.h xcb_shape_rectangles
4921     disabled libxcb_shm ||
4922         check_pkg_config libxcb_shm xcb-shm xcb/shm.h xcb_shm_attach
4923     disabled libxcb_xfixes ||
4924         check_pkg_config libxcb_xfixes xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image
4925 fi
4926
4927 # d3d11va requires linking directly to dxgi and d3d11 if not building for
4928 # the desktop api partition
4929 check_cpp <<EOF && enable uwp && d3d11va_extralibs="-ldxgi -ld3d11"
4930 #ifdef WINAPI_FAMILY
4931 #include <winapifamily.h>
4932 #if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4933 #error desktop, not uwp
4934 #else
4935 // WINAPI_FAMILY_APP, WINAPI_FAMILY_PHONE_APP => UWP
4936 #endif
4937 #else
4938 #error no family set
4939 #endif
4940 EOF
4941
4942 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4943
4944 enabled vaapi &&
4945     check_code cc "va/va.h" "vaCreateSurfaces(0, 0, 0, 0, 0, 0, 0, 0)" ||
4946     disable vaapi
4947
4948 enabled vaapi &&
4949     check_lib vaapi_drm "va/va.h va/va_drm.h" vaGetDisplayDRM -lva -lva-drm
4950
4951 enabled vaapi &&
4952     check_lib vaapi_x11 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 -lX11
4953
4954 enabled vdpau &&
4955     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4956     disable vdpau
4957
4958 enabled vdpau &&
4959     check_lib vdpau_x11 "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau -lX11
4960
4961 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4962
4963 # add some useful compiler flags if supported
4964 check_cflags -Wdeclaration-after-statement
4965 check_cflags -Wall
4966 check_cflags -Wdisabled-optimization
4967 check_cflags -Wpointer-arith
4968 check_cflags -Wredundant-decls
4969 check_cflags -Wwrite-strings
4970 check_cflags -Wtype-limits
4971 check_cflags -Wundef
4972 check_cflags -Wmissing-prototypes
4973 check_cflags -Wstrict-prototypes
4974
4975 if enabled extra_warnings; then
4976     check_cflags -Wcast-qual
4977     check_cflags -Wextra
4978     check_cflags -Wpedantic
4979 fi
4980
4981 check_disable_warning(){
4982     warning_flag=-W${1#-Wno-}
4983     test_cflags $warning_flag && add_cflags $1
4984 }
4985
4986 check_disable_warning -Wno-parentheses
4987 check_disable_warning -Wno-switch
4988 check_disable_warning -Wno-format-zero-length
4989 check_disable_warning -Wno-pointer-sign
4990
4991 check_disable_warning_headers(){
4992     warning_flag=-W${1#-Wno-}
4993     test_cflags $warning_flag && add_cflags_headers $1
4994 }
4995
4996 check_disable_warning_headers -Wno-deprecated-declarations
4997 check_disable_warning_headers -Wno-unused-variable
4998
4999 check_objcflags -fobjc-arc && enable objc_arc
5000
5001 check_cc <<EOF && enable blocks_extension
5002 void (^block)(void);
5003 EOF
5004
5005 # add some linker flags
5006 check_ldflags -Wl,--warn-common
5007 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
5008 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir && add_ldsoflags -Wl,-rpath,$libdir
5009 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
5010
5011 # add some strip flags
5012 # -wN '..@*' is more selective than -x, but not available everywhere.
5013 check_stripflags -wN \'..@*\' || check_stripflags -x || strip='true'
5014
5015 enabled neon_clobber_test &&
5016     check_ldflags -Wl,--wrap,avcodec_open2              \
5017                   -Wl,--wrap,avcodec_decode_audio4      \
5018                   -Wl,--wrap,avcodec_decode_video2      \
5019                   -Wl,--wrap,avcodec_decode_subtitle2   \
5020                   -Wl,--wrap,avcodec_encode_audio2      \
5021                   -Wl,--wrap,avcodec_encode_video2      \
5022                   -Wl,--wrap,avcodec_encode_subtitle    \
5023                   -Wl,--wrap,avcodec_send_packet        \
5024                   -Wl,--wrap,avcodec_receive_packet     \
5025                   -Wl,--wrap,avcodec_send_frame         \
5026                   -Wl,--wrap,avcodec_receive_frame      \
5027                   -Wl,--wrap,avresample_convert ||
5028     disable neon_clobber_test
5029
5030 enabled xmm_clobber_test &&
5031     check_ldflags -Wl,--wrap,avcodec_open2              \
5032                   -Wl,--wrap,avcodec_decode_audio4      \
5033                   -Wl,--wrap,avcodec_decode_video2      \
5034                   -Wl,--wrap,avcodec_decode_subtitle2   \
5035                   -Wl,--wrap,avcodec_encode_audio2      \
5036                   -Wl,--wrap,avcodec_encode_video2      \
5037                   -Wl,--wrap,avcodec_encode_subtitle    \
5038                   -Wl,--wrap,avcodec_send_packet        \
5039                   -Wl,--wrap,avcodec_receive_packet     \
5040                   -Wl,--wrap,avcodec_send_frame         \
5041                   -Wl,--wrap,avcodec_receive_frame      \
5042                   -Wl,--wrap,avresample_convert         \
5043                   -Wl,--wrap,sws_scale ||
5044     disable xmm_clobber_test
5045
5046 check_ld <<EOF && enable proper_dce
5047 extern const int array[512];
5048 static inline int func(void) { return array[0]; }
5049 int main(void) { return 0; }
5050 EOF
5051
5052 if enabled proper_dce; then
5053     echo "X { local: *; };" > $TMPV
5054     if test_ldflags -Wl,${version_script},$TMPV; then
5055         append SHFLAGS '-Wl,${version_script},\$(SUBDIR)lib\$(NAME).ver'
5056         check_cc <<EOF && enable symver_asm_label
5057 void ff_foo(void) __asm__ ("av_foo@VERSION");
5058 void ff_foo(void) { ${inline_asm+__asm__($quotes);} }
5059 EOF
5060         check_cc <<EOF && enable symver_gnu_asm
5061 __asm__(".symver ff_foo,av_foo@VERSION");
5062 void ff_foo(void) {}
5063 EOF
5064     fi
5065 fi
5066
5067 if [ -z "$optflags" ]; then
5068     if enabled small; then
5069         optflags=$cflags_size
5070     elif enabled optimizations; then
5071         optflags=$cflags_speed
5072     else
5073         optflags=$cflags_noopt
5074     fi
5075 fi
5076
5077 check_optflags(){
5078     check_cflags "$@"
5079     enabled lto && check_ldflags "$@"
5080 }
5081
5082 check_optflags $optflags
5083 check_optflags -fno-math-errno
5084 check_optflags -fno-signed-zeros
5085
5086 if enabled lto; then
5087     test "$cc_type" != "$ld_type" && die "LTO requires same compiler and linker"
5088     check_cflags  -flto
5089     check_ldflags -flto $cpuflags
5090 fi
5091
5092 if enabled icc; then
5093     # Just warnings, no remarks
5094     check_cflags -w1
5095     # -wd: Disable following warnings
5096     # 144, 167, 556: -Wno-pointer-sign
5097     # 1292: attribute "foo" ignored
5098     # 1419: external declaration in primary source file
5099     # 10006: ignoring unknown option -fno-signed-zeros
5100     # 10148: ignoring unknown option -Wno-parentheses
5101     # 10156: ignoring option '-W'; no argument required
5102     check_cflags -wd144,167,556,1292,1419,10006,10148,10156
5103     # 11030: Warning unknown option --as-needed
5104     # 10156: ignoring option '-export'; no argument required
5105     check_ldflags -wd10156,11030
5106     # icc 11.0 and 11.1 work with ebp_available, but don't pass the test
5107     enable ebp_available
5108     if enabled x86_32; then
5109         icc_version=$($cc -dumpversion)
5110         test ${icc_version%%.*} -ge 11 &&
5111             check_cflags -falign-stack=maintain-16-byte ||
5112             disable aligned_stack
5113     fi
5114 elif enabled ccc; then
5115     # disable some annoying warnings
5116     add_cflags -msg_disable bitnotint
5117     add_cflags -msg_disable mixfuncvoid
5118     add_cflags -msg_disable nonstandcast
5119     add_cflags -msg_disable unsupieee
5120 elif enabled gcc; then
5121     check_optflags -fno-tree-vectorize
5122     check_cflags -Werror=implicit-function-declaration
5123     check_cflags -Werror=missing-prototypes
5124     check_cflags -Werror=return-type
5125     check_cflags -Werror=declaration-after-statement
5126     check_cflags -Werror=vla
5127     check_cflags -Werror=format-security
5128     check_cflags -fdiagnostics-color=auto
5129     enabled extra_warnings || check_disable_warning -Wno-maybe-uninitialized
5130 elif enabled llvm_gcc; then
5131     check_cflags -mllvm -stack-alignment=16
5132 elif enabled clang; then
5133     check_cflags -mllvm -stack-alignment=16
5134     check_cflags -Qunused-arguments
5135     check_cflags -Werror=implicit-function-declaration
5136     check_cflags -Werror=missing-prototypes
5137     check_cflags -Werror=return-type
5138 elif enabled cparser; then
5139     add_cflags -Wno-missing-variable-declarations
5140     add_cflags -Wno-empty-statement
5141 elif enabled armcc; then
5142     add_cflags -W${armcc_opt},--diag_suppress=4343 # hardfp compat
5143     add_cflags -W${armcc_opt},--diag_suppress=3036 # using . as system include dir
5144     # 2523: use of inline assembly is deprecated
5145     add_cflags -W${armcc_opt},--diag_suppress=2523
5146     add_cflags -W${armcc_opt},--diag_suppress=1207
5147     add_cflags -W${armcc_opt},--diag_suppress=1293 # assignment in condition
5148     add_cflags -W${armcc_opt},--diag_suppress=3343 # hardfp compat
5149     add_cflags -W${armcc_opt},--diag_suppress=167  # pointer sign
5150     add_cflags -W${armcc_opt},--diag_suppress=513  # pointer sign
5151 elif enabled tms470; then
5152     add_cflags -pds=824 -pds=837
5153     disable inline_asm
5154 elif enabled pathscale; then
5155     add_cflags -fstrict-overflow -OPT:wrap_around_unsafe_opt=OFF
5156     disable inline_asm
5157 elif enabled_any msvc icl; then
5158     enabled x86_32 && disable aligned_stack
5159     enabled_all x86_32 debug && add_cflags -Oy-
5160     enabled debug && add_ldflags -debug
5161     enable pragma_deprecated
5162     if enabled icl; then
5163         # -Qansi-alias is basically -fstrict-aliasing, but does not work
5164         # (correctly) on icl 13.x.
5165         check_cpp_condition "windows.h" "__ICL < 1300 || __ICL >= 1400" &&
5166             add_cflags -Qansi-alias
5167         # icl will pass the inline asm tests but inline asm is currently
5168         # not supported (build will fail)
5169         disable inline_asm
5170     fi
5171     # msvcrt10 x64 incorrectly enables log2, only msvcrt12 (MSVC 2013) onwards actually has log2.
5172     check_cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION >= 12" || disable log2
5173     # The CRT headers contain __declspec(restrict) in a few places, but if redefining
5174     # restrict, this might break. MSVC 2010 and 2012 fail with __declspec(__restrict)
5175     # (as it ends up if the restrict redefine is done before including stdlib.h), while
5176     # MSVC 2013 and newer can handle it fine.
5177     # If this declspec fails, force including stdlib.h before the restrict redefinition
5178     # happens in config.h.
5179     if [ $_restrict != restrict ]; then
5180         check_cc <<EOF || add_cflags -FIstdlib.h
5181 __declspec($_restrict) void* foo(int);
5182 EOF
5183     fi
5184 fi
5185
5186 for pfx in "" host_; do
5187     varname=${pfx%_}cc_type
5188     eval "type=\$$varname"
5189     if [ "$type" = "msvc" ]; then
5190         check_${pfx}cc <<EOF || add_${pfx}cflags -Dinline=__inline
5191 static inline int foo(int a) { return a; }
5192 EOF
5193     fi
5194 done
5195
5196 case $as_type in
5197     clang)
5198         add_asflags -Qunused-arguments
5199     ;;
5200 esac
5201
5202 case $ld_type in
5203     clang)
5204         check_ldflags -Qunused-arguments
5205     ;;
5206 esac
5207
5208 case $target_os in
5209     osf1)
5210         enabled ccc && add_ldflags '-Wl,-expect_unresolved,*'
5211     ;;
5212 esac
5213
5214 enabled asm || { arch=c; disable $ARCH_LIST $ARCH_EXT_LIST; }
5215
5216 check_deps $CONFIG_LIST       \
5217            $CONFIG_EXTRA      \
5218            $HAVE_LIST         \
5219            $ALL_COMPONENTS    \
5220
5221 flatten_extralibs(){
5222     unset nested_entries
5223     list_name=$1
5224     eval list=\$${1}
5225     for entry in $list; do
5226         entry_copy=$entry
5227         resolve entry_copy
5228         append nested_entries $(filter '*_extralibs' $entry_copy)
5229         flat_entries=$(filter_out '*_extralibs' $entry_copy)
5230         eval $entry="\$flat_entries"
5231     done
5232     append $list_name "$nested_entries"
5233
5234     resolve nested_entries
5235     if test -n "$(filter '*_extralibs' $nested_entries)"; then
5236         flatten_extralibs $list_name
5237     fi
5238 }
5239
5240 for linkunit in $LIBRARY_LIST; do
5241     unset current_extralibs
5242     eval components=\$$(toupper ${linkunit})_COMPONENTS_LIST
5243     for comp in ${components}; do
5244         enabled $comp || continue
5245         comp_extralibs="${comp}_extralibs"
5246         append current_extralibs $comp_extralibs
5247     done
5248     eval prepend ${linkunit}_extralibs $current_extralibs
5249 done
5250
5251 for linkunit in $LIBRARY_LIST $PROGRAM_LIST $EXTRALIBS_LIST; do
5252     flatten_extralibs ${linkunit}_extralibs
5253     unique  ${linkunit}_extralibs
5254     resolve ${linkunit}_extralibs
5255     eval ${linkunit}_extralibs=\$\(\$ldflags_filter \$${linkunit}_extralibs\)
5256 done
5257
5258 map 'enabled $v && intrinsics=${v#intrinsics_}' $INTRINSICS_LIST
5259
5260 for thread in $THREADS_LIST; do
5261     if enabled $thread; then
5262         test -n "$thread_type" &&
5263             die "ERROR: Only one thread type must be selected." ||
5264             thread_type="$thread"
5265     fi
5266 done
5267
5268 if disabled stdatomic_h; then
5269     if enabled atomics_gcc; then
5270         add_cppflags '-I\$(SRC_PATH)/compat/atomics/gcc'
5271     elif enabled atomics_win32; then
5272         add_cppflags '-I\$(SRC_PATH)/compat/atomics/win32'
5273     elif enabled atomics_suncc; then
5274         add_cppflags '-I\$(SRC_PATH)/compat/atomics/suncc'
5275     elif enabled pthreads; then
5276         add_compat atomics/pthread/stdatomic.o
5277         add_cppflags '-I\$(SRC_PATH)/compat/atomics/pthread'
5278     else
5279         enabled threads && die "Threading is enabled, but no atomics are available"
5280         add_cppflags '-I\$(SRC_PATH)/compat/atomics/dummy'
5281     fi
5282 fi
5283
5284 enabled zlib && add_cppflags -DZLIB_CONST
5285
5286 # conditional library dependencies, in linking order
5287 enabled movie_filter    && prepend avfilter_deps "avformat avcodec"
5288 enabled_any asyncts_filter resample_filter &&
5289                            prepend avfilter_deps "avresample"
5290 enabled scale_filter    && prepend avfilter_deps "swscale"
5291
5292 enabled opus_decoder    && prepend avcodec_deps "avresample"
5293
5294 expand_deps(){
5295     lib_deps=${1}_deps
5296     eval "deps=\$$lib_deps"
5297     append $lib_deps $(map 'eval echo \$${v}_deps' $deps)
5298     unique $lib_deps
5299 }
5300
5301 map 'expand_deps $v' $LIBRARY_LIST
5302
5303 if test "$quiet" != "yes"; then
5304
5305 echo "install prefix            $prefix"
5306 echo "source path               $source_path"
5307 echo "C compiler                $cc"
5308 echo "C library                 $libc_type"
5309 if test "$host_cc" != "$cc"; then
5310     echo "host C compiler           $host_cc"
5311     echo "host C library            $host_libc_type"
5312 fi
5313 echo "ARCH                      $arch ($cpu)"
5314 if test "$extra_version" != ""; then
5315     echo "version string suffix     $extra_version"
5316 fi
5317 echo "big-endian                ${bigendian-no}"
5318 echo "runtime cpu detection     ${runtime_cpudetect-no}"
5319 if enabled x86; then
5320     echo "standalone assembly       ${x86asm-no}"
5321     echo "x86 assembler             ${x86asmexe}"
5322     echo "MMX enabled               ${mmx-no}"
5323     echo "MMXEXT enabled            ${mmxext-no}"
5324     echo "3DNow! enabled            ${amd3dnow-no}"
5325     echo "3DNow! extended enabled   ${amd3dnowext-no}"
5326     echo "SSE enabled               ${sse-no}"
5327     echo "SSSE3 enabled             ${ssse3-no}"
5328     echo "AVX enabled               ${avx-no}"
5329     echo "XOP enabled               ${xop-no}"
5330     echo "FMA3 enabled              ${fma3-no}"
5331     echo "FMA4 enabled              ${fma4-no}"
5332     echo "i686 features enabled     ${i686-no}"
5333     echo "CMOV is fast              ${fast_cmov-no}"
5334     echo "EBX available             ${ebx_available-no}"
5335     echo "EBP available             ${ebp_available-no}"
5336 fi
5337 if enabled aarch64; then
5338     echo "NEON enabled              ${neon-no}"
5339     echo "VFP enabled               ${vfp-no}"
5340 fi
5341 if enabled arm; then
5342     echo "ARMv5TE enabled           ${armv5te-no}"
5343     echo "ARMv6 enabled             ${armv6-no}"
5344     echo "ARMv6T2 enabled           ${armv6t2-no}"
5345     echo "VFP enabled               ${vfp-no}"
5346     echo "NEON enabled              ${neon-no}"
5347 fi
5348 if enabled ppc; then
5349     echo "AltiVec enabled           ${altivec-no}"
5350     echo "VSX enabled               ${vsx-no}"
5351     echo "POWER8 enabled            ${power8-no}"
5352     echo "PPC 4xx optimizations     ${ppc4xx-no}"
5353     echo "dcbzl available           ${dcbzl-no}"
5354 fi
5355 echo "debug symbols             ${debug-no}"
5356 echo "optimize for size         ${small-no}"
5357 echo "optimizations             ${optimizations-no}"
5358 echo "static                    ${static-no}"
5359 echo "shared                    ${shared-no}"
5360 echo "network support           ${network-no}"
5361 echo "threading support         ${thread_type-no}"
5362 echo "safe bitstream reader     ${safe_bitstream_reader-no}"
5363 test -n "$random_seed" &&
5364     echo "random seed               ${random_seed}"
5365 echo
5366
5367 echo "External libraries:"
5368 print_enabled '' $EXTERNAL_LIBRARY_LIST | print_3_columns
5369 echo
5370 echo "External libraries providing hardware acceleration:"
5371 print_enabled '' $HWACCEL_LIBRARY_LIST | print_3_columns
5372 echo
5373
5374 echo "Libraries:"
5375 print_enabled '' $LIBRARY_LIST | print_3_columns
5376 echo
5377
5378 echo "Programs:"
5379 print_enabled '' $PROGRAM_LIST | print_3_columns
5380 echo
5381
5382 for type in decoder encoder hwaccel parser demuxer muxer protocol filter bsf indev outdev; do
5383     echo "Enabled ${type}s:"
5384     eval list=\$$(toupper $type)_LIST
5385     print_enabled '_*' $list | print_3_columns
5386     echo
5387 done
5388
5389 if test -n "$ignore_tests"; then
5390     ignore_tests=$(echo $ignore_tests | tr ',' ' ')
5391     echo "Ignored FATE tests:"
5392     echo $ignore_tests | print_3_columns
5393     echo
5394 fi
5395
5396 license="LGPL version 2.1 or later"
5397 if enabled nonfree; then
5398     license="nonfree and unredistributable"
5399 elif enabled gplv3; then
5400     license="GPL version 3 or later"
5401 elif enabled lgplv3; then
5402     license="LGPL version 3 or later"
5403 elif enabled gpl; then
5404     license="GPL version 2 or later"
5405 fi
5406
5407 echo "License: $license"
5408
5409 echo "Creating configuration files ..."
5410
5411 fi # test "$quiet" != "yes"
5412
5413 test -e Makefile || echo "include $source_path/Makefile" > Makefile
5414
5415 config_files="$TMPH avbuild/config.mak"
5416
5417 cat > avbuild/config.mak <<EOF
5418 # Automatically generated by configure - do not modify!
5419 LIBAV_CONFIGURATION=$LIBAV_CONFIGURATION
5420 prefix=$prefix
5421 LIBDIR=\$(DESTDIR)$libdir
5422 SHLIBDIR=\$(DESTDIR)$shlibdir
5423 INCDIR=\$(DESTDIR)$incdir
5424 BINDIR=\$(DESTDIR)$bindir
5425 DATADIR=\$(DESTDIR)$datadir
5426 DOCDIR=\$(DESTDIR)$docdir
5427 MANDIR=\$(DESTDIR)$mandir
5428 SRC_PATH=$source_path
5429 CC_IDENT=$cc_ident
5430 ARCH=$arch
5431 INTRINSICS=$intrinsics
5432 CC=$cc
5433 AS=$as
5434 OBJCC=$objcc
5435 LD=$ld
5436 DEPCC=$dep_cc
5437 DEPCCFLAGS=$DEPCCFLAGS \$(CPPFLAGS)
5438 DEPAS=$as
5439 DEPASFLAGS=$DEPASFLAGS \$(CPPFLAGS)
5440 X86ASM=$x86asmexe
5441 DEPX86ASM=$x86asmexe
5442 DEPX86ASMFLAGS=\$(X86ASMFLAGS)
5443 AR=$ar
5444 ARFLAGS=$arflags
5445 AR_O=$ar_o
5446 AR_CMD=$ar
5447 NM_CMD=$nm
5448 RANLIB=$ranlib
5449 STRIP=$strip
5450 LN_S=$ln_s
5451 CPPFLAGS=$CPPFLAGS
5452 CFLAGS=$CFLAGS
5453 OBJCFLAGS=$OBJCFLAGS
5454 ASFLAGS=$ASFLAGS
5455 AS_C=$AS_C
5456 AS_O=$AS_O
5457 OBJCC_C=$OBJCC_C
5458 OBJCC_E=$OBJCC_E
5459 OBJCC_O=$OBJCC_O
5460 CC_C=$CC_C
5461 CC_E=$CC_E
5462 CC_O=$CC_O
5463 X86ASM_O=$X86ASM_O
5464 LD_O=$LD_O
5465 LD_LIB=$LD_LIB
5466 LD_PATH=$LD_PATH
5467 DLLTOOL=$dlltool
5468 LDFLAGS=$LDFLAGS
5469 LDEXEFLAGS=$LDEXEFLAGS
5470 LDSOFLAGS=$LDSOFLAGS
5471 SHFLAGS=$(echo $($ldflags_filter $SHFLAGS))
5472 STRIPFLAGS=$STRIPFLAGS
5473 X86ASMFLAGS=$X86ASMFLAGS
5474 LIBPREF=$LIBPREF
5475 LIBSUF=$LIBSUF
5476 LIBNAME=$LIBNAME
5477 SLIBPREF=$SLIBPREF
5478 SLIBSUF=$SLIBSUF
5479 EXESUF=$EXESUF
5480 EXTRA_VERSION=$extra_version
5481 CCDEP=$CCDEP
5482 CCDEP_FLAGS=$CCDEP_FLAGS
5483 ASDEP=$ASDEP
5484 ASDEP_FLAGS=$ASDEP_FLAGS
5485 X86ASMDEP=$X86ASMDEP
5486 X86ASMDEP_FLAGS=$X86ASMDEP_FLAGS
5487 CC_DEPFLAGS=$CC_DEPFLAGS
5488 AS_DEPFLAGS=$AS_DEPFLAGS
5489 X86ASM_DEPFLAGS=$X86ASM_DEPFLAGS
5490 HOSTCC=$host_cc
5491 HOSTLD=$host_ld
5492 HOSTCFLAGS=$host_cflags
5493 HOSTCPPFLAGS=$host_cppflags
5494 HOSTEXESUF=$HOSTEXESUF
5495 HOSTLDFLAGS=$host_ldflags
5496 HOSTEXTRALIBS=$host_extralibs
5497 DEPHOSTCC=$host_cc
5498 DEPHOSTCCFLAGS=$DEPHOSTCCFLAGS \$(HOSTCCFLAGS)
5499 HOSTCCDEP=$HOSTCCDEP
5500 HOSTCCDEP_FLAGS=$HOSTCCDEP_FLAGS
5501 HOSTCC_DEPFLAGS=$HOSTCC_DEPFLAGS
5502 HOSTCC_C=$HOSTCC_C
5503 HOSTCC_O=$HOSTCC_O
5504 HOSTLD_O=$HOSTLD_O
5505 TARGET_EXEC=$target_exec $target_exec_args
5506 TARGET_PATH=$target_path
5507 TARGET_SAMPLES=${target_samples:-\$(SAMPLES)}
5508 CFLAGS-avplay=$sdl_cflags
5509 CFLAGS_HEADERS=$CFLAGS_HEADERS
5510 LIB_INSTALL_EXTRA_CMD=$LIB_INSTALL_EXTRA_CMD
5511 EXTRALIBS=$extralibs
5512 COMPAT_OBJS=$compat_objs
5513 INSTALL=install
5514 LIBTARGET=${LIBTARGET}
5515 SLIBNAME=${SLIBNAME}
5516 SLIBNAME_WITH_VERSION=${SLIBNAME_WITH_VERSION}
5517 SLIBNAME_WITH_MAJOR=${SLIBNAME_WITH_MAJOR}
5518 SLIB_CREATE_DEF_CMD=${SLIB_CREATE_DEF_CMD}
5519 SLIB_EXTRA_CMD=${SLIB_EXTRA_CMD}
5520 SLIB_INSTALL_NAME=${SLIB_INSTALL_NAME}
5521 SLIB_INSTALL_LINKS=${SLIB_INSTALL_LINKS}
5522 SLIB_INSTALL_EXTRA_LIB=${SLIB_INSTALL_EXTRA_LIB}
5523 SLIB_INSTALL_EXTRA_SHLIB=${SLIB_INSTALL_EXTRA_SHLIB}
5524 VERSION_SCRIPT_POSTPROCESS_CMD=${VERSION_SCRIPT_POSTPROCESS_CMD}
5525 SAMPLES:=${samples:-\$(LIBAV_SAMPLES)}
5526 IGNORE_TESTS=$ignore_tests
5527 EOF
5528
5529 map 'eval echo "${v}_FFLIBS=\$${v}_deps" >> avbuild/config.mak' $LIBRARY_LIST
5530
5531 for entry in $LIBRARY_LIST $PROGRAM_LIST $EXTRALIBS_LIST; do
5532     eval echo "EXTRALIBS-${entry}=\$${entry}_extralibs" >> avbuild/config.mak
5533 done
5534
5535 cat > $TMPH <<EOF
5536 /* Automatically generated by configure - do not modify! */
5537 #ifndef LIBAV_CONFIG_H
5538 #define LIBAV_CONFIG_H
5539 #define LIBAV_CONFIGURATION "$(c_escape $LIBAV_CONFIGURATION)"
5540 #define LIBAV_LICENSE "$(c_escape $license)"
5541 #define AVCONV_DATADIR "$(eval c_escape $datadir)"
5542 #define CC_IDENT "$(c_escape ${cc_ident:-Unknown compiler})"
5543 #define restrict $_restrict
5544 #define EXTERN_PREFIX "${extern_prefix}"
5545 #define EXTERN_ASM ${extern_prefix}
5546 #define SLIBSUF "$SLIBSUF"
5547 EOF
5548
5549 test -n "$malloc_prefix" &&
5550     echo "#define MALLOC_PREFIX $malloc_prefix" >>$TMPH
5551
5552 if enabled x86asm; then
5553     append config_files $TMPASM
5554     printf '' >$TMPASM
5555 fi
5556
5557 enabled getenv || echo "#define getenv(x) NULL" >> $TMPH
5558
5559 print_config ARCH_   "$config_files" $ARCH_LIST
5560 print_config HAVE_   "$config_files" $HAVE_LIST
5561 print_config CONFIG_ "$config_files" $CONFIG_LIST       \
5562                                      $CONFIG_EXTRA      \
5563                                      $ALL_COMPONENTS    \
5564
5565 echo "#endif /* LIBAV_CONFIG_H */" >> $TMPH
5566
5567 # Do not overwrite an unchanged config.h to avoid superfluous rebuilds.
5568 cp_if_changed $TMPH config.h
5569 touch avbuild/.config
5570
5571 enabled x86asm && cp_if_changed $TMPASM config.asm
5572
5573 cat > $TMPH <<EOF
5574 /* Generated by ffconf */
5575 #ifndef AVUTIL_AVCONFIG_H
5576 #define AVUTIL_AVCONFIG_H
5577 EOF
5578
5579 print_config AV_HAVE_ $TMPH $HAVE_LIST_PUB
5580
5581 echo "#endif /* AVUTIL_AVCONFIG_H */" >> $TMPH
5582
5583 cp_if_changed $TMPH libavutil/avconfig.h
5584
5585 # generate the lists of enabled components
5586 print_enabled_components(){
5587     file=$1
5588     struct_name=$2
5589     name=$3
5590     shift 3
5591     echo "static const $struct_name * const $name[] = {" > $TMPH
5592     for c in $*; do
5593         enabled $c && printf "    &ff_%s,\n" $c >> $TMPH
5594     done
5595     echo "    NULL };" >> $TMPH
5596     cp_if_changed $TMPH $file
5597 }
5598
5599 print_enabled_components libavcodec/bsf_list.c AVBitStreamFilter bitstream_filters $BSF_LIST
5600 print_enabled_components libavformat/protocol_list.c URLProtocol url_protocols $PROTOCOL_LIST
5601
5602 test -n "$WARNINGS" && printf "\n$WARNINGS"
5603
5604 # Settings for pkg-config files
5605
5606 cat > avbuild/config.sh <<EOF
5607 # Automatically generated by configure - do not modify!
5608 shared=$shared
5609 prefix=$prefix
5610 libdir=$libdir
5611 incdir=$incdir
5612 source_path=${source_path}
5613 LIBPREF=${LIBPREF}
5614 LIBSUF=${LIBSUF}
5615 extralibs_avutil="$avutil_extralibs"
5616 extralibs_avcodec="$avcodec_extralibs"
5617 extralibs_avformat="$avformat_extralibs"
5618 extralibs_avdevice="$avdevice_extralibs"
5619 extralibs_avfilter="$avfilter_extralibs"
5620 extralibs_avresample="$avresample_extralibs"
5621 extralibs_swscale="$swscale_extralibs"
5622 EOF
5623
5624 for lib in $LIBRARY_LIST; do
5625     lib_deps="$(eval echo \$${lib}_deps)"
5626     echo ${lib}_deps=\"$lib_deps\" >> avbuild/config.sh
5627 done