configure

   1 #!/bin/sh
   2 #
   3 # Libav configure script
   4 #
   5 # Copyright (c) 2000-2002 Fabrice Bellard
   6 # Copyright (c) 2005-2008 Diego Biurrun
   7 # Copyright (c) 2005-2008 Mans Rullgard
   8 #
   9
  10 # Prevent locale nonsense from breaking basic text processing.
  11 LC_ALL=C
  12 export LC_ALL
  13
  14 # make sure we are running under a compatible shell
  15 # try to make this part work with most shells
  16
  17 try_exec(){
  18     echo "Trying shell $1"
  19     type "$1" > /dev/null 2>&1 && exec "$@"
  20 }
  21
  22 unset foo
  23 (: ${foo%%bar}) 2> /dev/null
  24 E1="$?"
  25
  26 (: ${foo?}) 2> /dev/null
  27 E2="$?"
  28
  29 if test "$E1" != 0 || test "$E2" = 0; then
  30     echo "Broken shell detected.  Trying alternatives."
  31     export FF_CONF_EXEC
  32     if test "0$FF_CONF_EXEC" -lt 1; then
  33         FF_CONF_EXEC=1
  34         try_exec bash "$0" "$@"
  35     fi
  36     if test "0$FF_CONF_EXEC" -lt 2; then
  37         FF_CONF_EXEC=2
  38         try_exec ksh "$0" "$@"
  39     fi
  40     if test "0$FF_CONF_EXEC" -lt 3; then
  41         FF_CONF_EXEC=3
  42         try_exec /usr/xpg4/bin/sh "$0" "$@"
  43     fi
  44     echo "No compatible shell script interpreter found."
  45     echo "This configure script requires a POSIX-compatible shell"
  46     echo "such as bash or ksh."
  47     echo "THIS IS NOT A BUG IN LIBAV, DO NOT REPORT IT AS SUCH."
  48     echo "Instead, install a working POSIX-compatible shell."
  49     echo "Disabling this configure test will create a broken Libav."
  50     if test "$BASH_VERSION" = '2.04.0(1)-release'; then
  51         echo "This bash version ($BASH_VERSION) is broken on your platform."
  52         echo "Upgrade to a later version if available."
  53     fi
  54     exit 1
  55 fi
  56
  57 test -d /usr/xpg4/bin && PATH=/usr/xpg4/bin:$PATH
  58
  59 show_help(){
  60     cat <<EOF
  61 Usage: configure [options]
  62 Options: [defaults in brackets after descriptions]
  63
  64 Help options:
  65   --help                   print this message
  66   --quiet                  Suppress showing informative output
  67   --list-decoders          show all available decoders
  68   --list-encoders          show all available encoders
  69   --list-hwaccels          show all available hardware accelerators
  70   --list-demuxers          show all available demuxers
  71   --list-muxers            show all available muxers
  72   --list-parsers           show all available parsers
  73   --list-protocols         show all available protocols
  74   --list-bsfs              show all available bitstream filters
  75   --list-indevs            show all available input devices
  76   --list-filters           show all available filters
  77
  78 Standard options:
  79   --logfile=FILE           log tests and output to FILE [avbuild/config.log]
  80   --disable-logging        do not log configure debug information
  81   --prefix=PREFIX          install in PREFIX [$prefix_default]
  82   --bindir=DIR             install binaries in DIR [PREFIX/bin]
  83   --datadir=DIR            install data files in DIR [PREFIX/share/avconv]
  84   --docdir=DIR             install documentation in DIR [PREFIX/share/doc/libav]
  85   --libdir=DIR             install libs in DIR [PREFIX/lib]
  86   --shlibdir=DIR           install shared libs in DIR [PREFIX/lib]
  87   --incdir=DIR             install includes in DIR [PREFIX/include]
  88   --mandir=DIR             install man page in DIR [PREFIX/share/man]
  89   --enable-rpath           use rpath when linking programs (USE WITH CARE)
  90
  91 Licensing options:
  92   --enable-gpl             allow use of GPL code, the resulting libs
  93                            and binaries will be under GPL [no]
  94   --enable-version3        upgrade (L)GPL to version 3 [no]
  95   --enable-nonfree         allow use of nonfree code, the resulting libs
  96                            and binaries will be unredistributable [no]
  97
  98 Configuration options:
  99   --disable-static         do not build static libraries [no]
 100   --enable-shared          build shared libraries [no]
 101   --enable-small           optimize for size instead of speed
 102   --enable-runtime-cpudetect detect CPU capabilities at runtime (bigger binary)
 103   --enable-gray            enable full grayscale support (slower color)
 104   --disable-swscale-alpha  disable alpha channel support in swscale
 105   --disable-all            disable building components, libraries and programs
 106
 107 Program options:
 108   --disable-programs       do not build command line programs
 109   --disable-avconv         disable avconv build
 110   --disable-avplay         disable avplay build
 111   --disable-avprobe        disable avprobe build
 112
 113 Component options:
 114   --disable-doc            do not build documentation
 115   --disable-pod2man        do not build manual pages
 116   --disable-texi2html      do not build HTML documentation
 117   --disable-avdevice       disable libavdevice build
 118   --disable-avcodec        disable libavcodec build
 119   --disable-avformat       disable libavformat build
 120   --disable-avutil         disable libavutil build
 121   --disable-swscale        disable libswscale build
 122   --disable-avfilter       disable video filter support [no]
 123   --disable-avresample     disable libavresample build [no]
 124   --disable-pthreads       disable pthreads [auto]
 125   --disable-w32threads     disable Win32 threads [auto]
 126   --disable-network        disable network support [no]
 127   --disable-dct            disable DCT code
 128   --disable-error-resilience disable error resilience code
 129   --disable-lsp            disable LSP code
 130   --disable-lzo            disable LZO decoder code
 131   --disable-mdct           disable MDCT code
 132   --disable-rdft           disable RDFT code
 133   --disable-fft            disable FFT code
 134   --disable-faan           disable floating point AAN (I)DCT code
 135
 136 Individual component options:
 137   --disable-everything     disable all components listed below
 138   --disable-encoder=NAME   disable encoder NAME
 139   --enable-encoder=NAME    enable encoder NAME
 140   --disable-encoders       disable all encoders
 141   --disable-decoder=NAME   disable decoder NAME
 142   --enable-decoder=NAME    enable decoder NAME
 143   --disable-decoders       disable all decoders
 144   --disable-hwaccel=NAME   disable hwaccel NAME
 145   --enable-hwaccel=NAME    enable hwaccel NAME
 146   --disable-hwaccels       disable all hwaccels
 147   --disable-muxer=NAME     disable muxer NAME
 148   --enable-muxer=NAME      enable muxer NAME
 149   --disable-muxers         disable all muxers
 150   --disable-demuxer=NAME   disable demuxer NAME
 151   --enable-demuxer=NAME    enable demuxer NAME
 152   --disable-demuxers       disable all demuxers
 153   --enable-parser=NAME     enable parser NAME
 154   --disable-parser=NAME    disable parser NAME
 155   --disable-parsers        disable all parsers
 156   --enable-bsf=NAME        enable bitstream filter NAME
 157   --disable-bsf=NAME       disable bitstream filter NAME
 158   --disable-bsfs           disable all bitstream filters
 159   --enable-protocol=NAME   enable protocol NAME
 160   --disable-protocol=NAME  disable protocol NAME
 161   --disable-protocols      disable all protocols
 162   --enable-indev=NAME      enable input device NAME
 163   --disable-indev=NAME     disable input device NAME
 164   --disable-indevs         disable input devices
 165   --disable-devices        disable all devices
 166   --enable-filter=NAME     enable filter NAME
 167   --disable-filter=NAME    disable filter NAME
 168   --disable-filters        disable all filters
 169
 170 External library support:
 171
 172   Using any of the following switches will allow Libav to link to the
 173   corresponding external library. All the components depending on that library
 174   will become enabled, if all their other dependencies are met and they are not
 175   explicitly disabled. E.g. --enable-libwavpack will enable linking to
 176   libwavpack and allow the libwavpack encoder to be built, unless it is
 177   specifically disabled with --disable-encoder=libwavpack.
 178
 179   Note that only the system libraries are auto-detected. All the other external
 180   libraries must be explicitly enabled.
 181
 182   Also note that the following help text describes the purpose of the libraries
 183   themselves, not all their features will necessarily be usable by Libav.
 184
 185   --enable-avisynth          video frameserver
 186   --enable-avxsynth          Linux version of AviSynth
 187   --enable-bzlib             bzip2 compression [autodetect]
 188   --enable-frei0r            video filtering plugins
 189   --enable-gnutls            crypto
 190   --enable-libaom            AV1 video encoding/decoding
 191   --enable-libbs2b           Bauer stereophonic-to-binaural DSP
 192   --enable-libcdio           audio CD input
 193   --enable-libdc1394         IEEE 1394/Firewire camera input
 194   --enable-libdcadec         DCA audio decoding
 195   --enable-libfaac           AAC audio encoding
 196   --enable-libfdk-aac        AAC audio encoding/decoding
 197   --enable-libfontconfig     font configuration and management
 198   --enable-libfreetype       font rendering
 199   --enable-libgsm            GSM audio encoding/decoding
 200   --enable-libhdcd           HDCD decoding filter
 201   --enable-libilbc           ILBC audio encoding/decoding
 202   --enable-libjack           JACK audio sound server
 203   --enable-libkvazaar        HEVC video encoding
 204   --enable-libmp3lame        MP3 audio encoding
 205   --enable-libopencore-amrnb AMR-NB audio encoding/decoding
 206   --enable-libopencore-amrwb AMR-WB audio decoding
 207   --enable-libopencv         computer vision
 208   --enable-libopenh264       H.264 video encoding/decoding
 209   --enable-libopenjpeg       JPEG 2000 image encoding/decoding
 210   --enable-libopus           Opus audio encoding/decoding
 211   --enable-libpulse          Pulseaudio sound server
 212   --enable-librtmp           RTMP streaming
 213   --enable-libschroedinger   Dirac video encoding/decoding
 214   --enable-libsnappy         snappy compression
 215   --enable-libspeex          Speex audio encoding/decoding
 216   --enable-libtheora         Theora video encoding/decoding
 217   --enable-libtwolame        MP2 audio encoding
 218   --enable-libvo-aacenc      AAC audio encoding
 219   --enable-libvo-amrwbenc    AMR-WB audio encoding
 220   --enable-libvorbis         Vorbis audio encoding/decoding
 221   --enable-libvpx            VP* video encoding/decoding
 222   --enable-libwavpack        Wavpack audio encoding/decoding
 223   --enable-libwebp           WebP image encoding/decoding
 224   --enable-libx264           H.264 video encoding
 225   --enable-libx265           HEVC video encoding
 226   --enable-libxavs           Chinese AVS video encoding
 227   --enable-libxcb            X window system protocol communication
 228   --enable-libxcb-shm        X11 shm communication [auto]
 229   --enable-libxcb-xfixes     X11 mouse rendering [auto]
 230   --enable-libxvid           MPEG-4 ASP video encoding
 231   --enable-openssl           crypto
 232   --enable-zlib              compression [autodetect]
 233
 234   The following libraries provide various hardware acceleration features:
 235   --enable-amf     AMF video encoding code [auto]
 236   --enable-cuda    Nvidia CUDA (dynamically linked)
 237   --enable-cuvid   Nvidia CUVID video decode acceleration
 238   --enable-d3d11va Microsoft Direct3D 11 video acceleration [auto]
 239   --enable-dxva2   Microsoft DirectX 9 video acceleration [auto]
 240   --enable-libmfx  Intel MediaSDK (AKA Quick Sync Video)
 241   --enable-libnpp  Nvidia CUDA processing
 242   --enable-mmal    Broadcom Multi-Media Abstraction Layer (Raspberry Pi)
 243   --enable-nvenc   Nvidia video encoding
 244   --enable-omx     OpenMAX IL
 245   --enable-omx-rpi OpenMAX IL for Raspberry Pi
 246   --enable-vaapi   Video Acceleration API (mainly Unix/Intel)
 247   --enable-vda     Apple Video Decode Acceleration [auto]
 248   --enable-vdpau   Nvidia Video Decode and Presentation API for Unix [auto]
 249
 250 Toolchain options:
 251   --arch=ARCH              select architecture [$arch]
 252   --cpu=CPU                select the minimum required CPU (affects
 253                            instruction selection, may crash on older CPUs)
 254   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
 255   --enable-cross-compile   assume a cross-compiler is used
 256   --sysroot=PATH           root of cross-build tree
 257   --sysinclude=PATH        location of cross-build system headers
 258   --target-os=OS           compiler targets OS [$target_os]
 259   --target-exec=CMD        command to run executables on target
 260   --target-path=DIR        path to view of build directory on target
 261   --target-samples=DIR     path to samples directory on target
 262   --toolchain=NAME         set tool defaults according to NAME
 263   --nm=NM                  use nm tool
 264   --ar=AR                  use archive tool AR [$ar_default]
 265   --as=AS                  use assembler AS [$as_default]
 266   --cc=CC                  use C compiler CC [$cc_default]
 267   --objcc=OCC              use ObjC compiler OCC [$cc_default]
 268   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
 269   --ld=LD                  use linker LD
 270   --x86asmexe=X86ASM       use x86 assembler X86ASM
 271   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
 272   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
 273   --host-cc=HOSTCC         use host C compiler HOSTCC
 274   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
 275   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
 276   --host-ld=HOSTLD         use host linker HOSTLD
 277   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
 278   --host-libs=HLIBS        use libs HLIBS when linking for host
 279   --host-os=OS             compiler host OS [$target_os]
 280   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
 281   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
 282   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
 283   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
 284   --extra-ldsoflags=ELDFLAGS add ELDFLAGS to LDSOFLAGS [$LDSOFLAGS]
 285   --extra-libs=ELIBS       add ELIBS [$ELIBS]
 286   --extra-version=STRING   version string suffix []
 287   --optflags=OPTFLAGS      override optimization-related compiler flags
 288   --enable-pic             build position-independent code
 289   --enable-thumb           compile for Thumb instruction set
 290   --enable-lto             use link-time optimization
 291   --env="ENV=override"     override the environment variables
 292
 293 Advanced options (experts only):
 294   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
 295   --custom-allocator=NAME  use a supported custom allocator
 296   --disable-symver         disable symbol versioning
 297   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
 298   --disable-safe-bitstream-reader
 299                            disable buffer boundary checking in bitreaders
 300                            (faster, but may crash)
 301   --enable-sram            allow use of on-chip SRAM
 302
 303 Optimization options (experts only):
 304   --disable-asm            disable all assembly optimizations
 305   --disable-altivec        disable AltiVec optimizations
 306   --disable-vsx            disable VSX optimizations
 307   --disable-power8         disable POWER8 optimizations
 308   --disable-amd3dnow       disable 3DNow! optimizations
 309   --disable-amd3dnowext    disable 3DNow! extended optimizations
 310   --disable-mmx            disable MMX optimizations
 311   --disable-mmxext         disable MMXEXT optimizations
 312   --disable-sse            disable SSE optimizations
 313   --disable-sse2           disable SSE2 optimizations
 314   --disable-sse3           disable SSE3 optimizations
 315   --disable-ssse3          disable SSSE3 optimizations
 316   --disable-sse4           disable SSE4 optimizations
 317   --disable-sse42          disable SSE4.2 optimizations
 318   --disable-avx            disable AVX optimizations
 319   --disable-xop            disable XOP optimizations
 320   --disable-fma3           disable FMA3 optimizations
 321   --disable-fma4           disable FMA4 optimizations
 322   --disable-avx2           disable AVX2 optimizations
 323   --disable-armv5te        disable armv5te optimizations
 324   --disable-armv6          disable armv6 optimizations
 325   --disable-armv6t2        disable armv6t2 optimizations
 326   --disable-vfp            disable VFP optimizations
 327   --disable-neon           disable NEON optimizations
 328   --disable-inline-asm     disable use of inline assembly
 329   --disable-x86asm         disable use of standalone x86 assembly
 330
 331 Developer options (useful when working on Libav itself):
 332   --disable-debug          disable debugging symbols
 333   --enable-debug=LEVEL     set the debug level [$debuglevel]
 334   --disable-optimizations  disable compiler optimizations
 335   --enable-extra-warnings  enable more compiler warnings
 336   --samples=PATH           location of test samples for FATE, if not set use
 337                            \$LIBAV_SAMPLES at make invocation time.
 338   --enable-neon-clobber-test check NEON registers for clobbering (should be
 339                            used only for debugging purposes)
 340   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
 341                            should be used only for debugging purposes)
 342   --disable-valgrind-backtrace do not print a backtrace under Valgrind
 343                            (only applies to --disable-optimizations builds)
 344   --ignore-tests=TESTS     comma-separated list (without "fate-" prefix
 345                            in the name) of tests whose result is ignored
 346
 347 NOTE: Object files are built at the place where configure is launched.
 348 EOF
 349   exit 0
 350 }
 351
 352 log(){
 353     echo "$@" >> $logfile
 354 }
 355
 356 log_file(){
 357     log BEGIN $1
 358     i=1
 359     while read line; do
 360         printf '%5s   %s\n' "${i}" "${line}"
 361         i=$(($i+1))
 362     done < $1 >> $logfile
 363     log END $1
 364 }
 365
 366 echolog(){
 367     log "$@"
 368     echo "$@"
 369 }
 370
 371 warn(){
 372     log "WARNING: $*"
 373     WARNINGS="${WARNINGS}WARNING: $*\n"
 374 }
 375
 376 die(){
 377     echolog "$@"
 378     cat <<EOF
 379
 380 If you think configure made a mistake, make sure you are using the latest
 381 version from Git.  If the latest version fails, report the problem to the
 382 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
 383 EOF
 384     if disabled logging; then
 385         cat <<EOF
 386 Rerun configure with logging enabled (do not use --disable-logging), and
 387 include the log this produces with your report.
 388 EOF
 389     else
 390         cat <<EOF
 391 Include the log file "$logfile" produced by configure as this will help
 392 solving the problem.
 393 EOF
 394     fi
 395     exit 1
 396 }
 397
 398 # Avoid locale weirdness, besides we really just want to translate ASCII.
 399 toupper(){
 400     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
 401 }
 402
 403 tolower(){
 404     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
 405 }
 406
 407 c_escape(){
 408     echo "$*" | sed 's/["\\]/\\\0/g'
 409 }
 410
 411 sh_quote(){
 412     v=$(echo "$1" | sed "s/'/'\\\\''/g")
 413     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
 414     echo "$v"
 415 }
 416
 417 cleanws(){
 418     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
 419 }
 420
 421 filter(){
 422     pat=$1
 423     shift
 424     for v; do
 425         eval "case '$v' in $pat) printf '%s ' '$v' ;; esac"
 426     done
 427 }
 428
 429 filter_out(){
 430     pat=$1
 431     shift
 432     for v; do
 433         eval "case '$v' in $pat) ;; *) printf '%s ' '$v' ;; esac"
 434     done
 435 }
 436
 437 map(){
 438     m=$1
 439     shift
 440     for v; do eval $m; done
 441 }
 442
 443 add_suffix(){
 444     suffix=$1
 445     shift
 446     for v; do echo ${v}${suffix}; done
 447 }
 448
 449 set_all(){
 450     value=$1
 451     shift
 452     for var in $*; do
 453         eval $var=$value
 454     done
 455 }
 456
 457 set_weak(){
 458     value=$1
 459     shift
 460     for var; do
 461         eval : \${$var:=$value}
 462     done
 463 }
 464
 465 sanitize_var_name(){
 466     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
 467 }
 468
 469 set_sanitized(){
 470     var=$1
 471     shift
 472     eval $(sanitize_var_name "$var")='$*'
 473 }
 474
 475 get_sanitized(){
 476     eval echo \$$(sanitize_var_name "$1")
 477 }
 478
 479 pushvar(){
 480     for pvar in $*; do
 481         eval level=\${${pvar}_level:=0}
 482         eval ${pvar}_${level}="\$$pvar"
 483         eval ${pvar}_level=$(($level+1))
 484     done
 485 }
 486
 487 popvar(){
 488     for pvar in $*; do
 489         eval level=\${${pvar}_level:-0}
 490         test $level = 0 && continue
 491         eval level=$(($level-1))
 492         eval $pvar="\${${pvar}_${level}}"
 493         eval ${pvar}_level=$level
 494         eval unset ${pvar}_${level}
 495     done
 496 }
 497
 498 enable(){
 499     set_all yes $*
 500 }
 501
 502 disable(){
 503     set_all no $*
 504 }
 505
 506 enable_weak(){
 507     set_weak yes $*
 508 }
 509
 510 disable_weak(){
 511     set_weak no $*
 512 }
 513
 514 enable_sanitized(){
 515     for var; do
 516         enable $(sanitize_var_name $var)
 517     done
 518 }
 519
 520 disable_sanitized(){
 521     for var; do
 522         disable $(sanitize_var_name $var)
 523     done
 524 }
 525
 526 do_enable_deep(){
 527     for var; do
 528         enabled $var && continue
 529         eval sel="\$${var}_select"
 530         eval sgs="\$${var}_suggest"
 531         pushvar var sgs
 532         enable_deep $sel
 533         popvar sgs
 534         enable_deep_weak $sgs
 535         popvar var
 536     done
 537 }
 538
 539 enable_deep(){
 540     do_enable_deep $*
 541     enable $*
 542 }
 543
 544 enable_deep_weak(){
 545     for var; do
 546         disabled $var && continue
 547         pushvar var
 548         do_enable_deep $var
 549         popvar var
 550         enable_weak $var
 551     done
 552 }
 553
 554 enabled(){
 555     test "${1#!}" = "$1" && op="=" || op="!="
 556     eval test "x\$${1#!}" $op "xyes"
 557 }
 558
 559 disabled(){
 560     test "${1#!}" = "$1" && op="=" || op="!="
 561     eval test "x\$${1#!}" $op "xno"
 562 }
 563
 564 enabled_all(){
 565     for opt; do
 566         enabled $opt || return 1
 567     done
 568 }
 569
 570 disabled_all(){
 571     for opt; do
 572         disabled $opt || return 1
 573     done
 574 }
 575
 576 enabled_any(){
 577     for opt; do
 578         enabled $opt && return 0
 579     done
 580 }
 581
 582 disabled_any(){
 583     for opt; do
 584         disabled $opt && return 0
 585     done
 586     return 1
 587 }
 588
 589 set_default(){
 590     for opt; do
 591         eval : \${$opt:=\$${opt}_default}
 592     done
 593 }
 594
 595 is_in(){
 596     value=$1
 597     shift
 598     for var in $*; do
 599         [ $var = $value ] && return 0
 600     done
 601     return 1
 602 }
 603
 604 check_deps(){
 605     for cfg; do
 606         enabled ${cfg}_checking && die "Circular dependency for $cfg."
 607         disabled ${cfg}_checking && continue
 608         enable ${cfg}_checking
 609
 610         eval dep_all="\$${cfg}_deps"
 611         eval dep_any="\$${cfg}_deps_any"
 612         eval dep_con="\$${cfg}_conflict"
 613         eval dep_sel="\$${cfg}_select"
 614         eval dep_sgs="\$${cfg}_suggest"
 615         eval dep_ifa="\$${cfg}_if"
 616         eval dep_ifn="\$${cfg}_if_any"
 617
 618         pushvar cfg dep_all dep_any dep_con dep_sel dep_sgs dep_ifa dep_ifn
 619         check_deps $dep_all $dep_any $dep_con $dep_sel $dep_sgs $dep_ifa $dep_ifn
 620         popvar cfg dep_all dep_any dep_con dep_sel dep_sgs dep_ifa dep_ifn
 621
 622         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
 623         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
 624         enabled_all  $dep_all || disable $cfg
 625         enabled_any  $dep_any || disable $cfg
 626         disabled_all $dep_con || disable $cfg
 627         disabled_any $dep_sel && disable $cfg
 628
 629         enabled $cfg && enable_deep_weak $dep_sel $dep_sgs
 630
 631         for dep in $dep_all $dep_any $dep_sel $dep_sgs; do
 632             # filter out library deps, these do not belong in extralibs
 633             is_in $dep $LIBRARY_LIST && continue
 634             enabled $dep && eval append ${cfg}_extralibs ${dep}_extralibs
 635         done
 636
 637         disable ${cfg}_checking
 638     done
 639 }
 640
 641 print_config(){
 642     pfx=$1
 643     files=$2
 644     shift 2
 645     map 'eval echo "$v \${$v:-no}"' "$@" |
 646     awk "BEGIN { split(\"$files\", files) }
 647         {
 648             c = \"$pfx\" toupper(\$1);
 649             v = \$2;
 650             sub(/yes/, 1, v);
 651             sub(/no/,  0, v);
 652             for (f in files) {
 653                 file = files[f];
 654                 if (file ~ /\\.h\$/) {
 655                     printf(\"#define %s %d\\n\", c, v) >>file;
 656                 } else if (file ~ /\\.asm\$/) {
 657                     printf(\"%%define %s %d\\n\", c, v) >>file;
 658                 } else if (file ~ /\\.mak\$/) {
 659                     n = -v ? \"\" : \"!\";
 660                     printf(\"%s%s=yes\\n\", n, c) >>file;
 661                 }
 662             }
 663         }"
 664 }
 665
 666 print_enabled(){
 667     suf=$1
 668     shift
 669     for v; do
 670         enabled $v && printf "%s\n" ${v%$suf}
 671     done
 672 }
 673
 674 append(){
 675     var=$1
 676     shift
 677     eval "$var=\"\$$var $*\""
 678 }
 679
 680 prepend(){
 681     var=$1
 682     shift
 683     eval "$var=\"$* \$$var\""
 684 }
 685
 686 unique(){
 687     var=$1
 688     uniq_list=""
 689     for tok in $(eval echo \$$var); do
 690         uniq_list="$(filter_out $tok $uniq_list) $tok"
 691     done
 692     eval "$var=\"${uniq_list}\""
 693 }
 694
 695 resolve(){
 696     var=$1
 697     tmpvar=
 698     for entry in $(eval echo \$$var); do
 699         tmpvar="$tmpvar $(eval echo \$${entry})"
 700     done
 701     eval "$var=\"${tmpvar}\""
 702 }
 703
 704 add_cppflags(){
 705     append CPPFLAGS "$@"
 706 }
 707
 708 add_cflags(){
 709     append CFLAGS $($cflags_filter "$@")
 710 }
 711
 712 add_cflags_headers(){
 713     append CFLAGS_HEADERS $($cflags_filter "$@")
 714 }
 715
 716 add_asflags(){
 717     append ASFLAGS $($asflags_filter "$@")
 718 }
 719
 720 add_objcflags(){
 721     append OBJCFLAGS $($objcflags_filter "$@")
 722 }
 723
 724 add_ldflags(){
 725     append LDFLAGS $($ldflags_filter "$@")
 726 }
 727
 728 add_ldexeflags(){
 729     append LDEXEFLAGS $($ldflags_filter "$@")
 730 }
 731
 732 add_ldsoflags(){
 733     append LDSOFLAGS $($ldflags_filter "$@")
 734 }
 735
 736 add_stripflags(){
 737     append STRIPFLAGS "$@"
 738 }
 739
 740 add_extralibs(){
 741     prepend extralibs $($ldflags_filter "$@")
 742 }
 743
 744 add_host_cppflags(){
 745     append host_cppflags "$@"
 746 }
 747
 748 add_host_cflags(){
 749     append host_cflags $($host_cflags_filter "$@")
 750 }
 751
 752 add_host_ldflags(){
 753     append host_ldflags $($host_ldflags_filter "$@")
 754 }
 755
 756 add_compat(){
 757     append compat_objs $1
 758     shift
 759     map 'add_cppflags -D$v' "$@"
 760 }
 761
 762 test_cmd(){
 763     log "$@"
 764     "$@" >> $logfile 2>&1
 765 }
 766
 767 cc_o(){
 768     eval printf '%s\\n' $CC_O
 769 }
 770
 771 cc_e(){
 772     eval printf '%s\\n' $CC_E
 773 }
 774
 775 test_cc(){
 776     log test_cc "$@"
 777     cat > $TMPC
 778     log_file $TMPC
 779     test_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
 780 }
 781
 782 test_objcc(){
 783     log test_objcc "$@"
 784     cat > $TMPC
 785     log_file $TMPC
 786     test_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
 787 }
 788
 789 test_cpp(){
 790     log test_cpp "$@"
 791     cat > $TMPC
 792     log_file $TMPC
 793     test_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
 794 }
 795
 796 as_o(){
 797     eval printf '%s\\n' $AS_O
 798 }
 799
 800 test_as(){
 801     log test_as "$@"
 802     cat > $TMPS
 803     log_file $TMPS
 804     test_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
 805 }
 806
 807 check_cmd(){
 808     log check_cmd "$@"
 809     cmd=$1
 810     disabled $cmd && return
 811     disable $cmd
 812     test_cmd $@ && enable $cmd
 813 }
 814
 815 check_as(){
 816     log check_as "$@"
 817     name=$1
 818     code=$2
 819     shift 2
 820     disable $name
 821     test_as $@ <<EOF && enable $name
 822 $code
 823 EOF
 824 }
 825
 826 check_inline_asm(){
 827     log check_inline_asm "$@"
 828     name="$1"
 829     code="$2"
 830     shift 2
 831     disable $name
 832     test_cc "$@" <<EOF && enable $name
 833 void foo(void){ __asm__ volatile($code); }
 834 EOF
 835 }
 836
 837 check_insn(){
 838     log check_insn "$@"
 839     check_inline_asm ${1}_inline "$2"
 840     check_as ${1}_external "$2"
 841 }
 842
 843 test_x86asm(){
 844     log test_x86asm "$@"
 845     echo "$1" > $TMPS
 846     log_file $TMPS
 847     shift 1
 848     test_cmd $x86asmexe $X86ASMFLAGS "$@" -o $TMPO $TMPS
 849 }
 850
 851 ld_o(){
 852     eval printf '%s\\n' $LD_O
 853 }
 854
 855 test_ld(){
 856     log test_ld "$@"
 857     flags=$(filter_out '-l*' "$@")
 858     libs=$(filter '-l*' "$@")
 859     test_cc $($cflags_filter $flags) || return
 860     flags=$($ldflags_filter $flags)
 861     libs=$($ldflags_filter $libs)
 862     test_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
 863 }
 864
 865 check_ld(){
 866     log check_ld "$@"
 867     name=$1
 868     shift
 869     disable $name
 870     test_ld $@ && enable $name
 871 }
 872
 873 print_include(){
 874     hdr=$1
 875     test "${hdr%.h}" = "${hdr}" &&
 876         echo "#include $hdr"    ||
 877         echo "#include <$hdr>"
 878 }
 879
 880 test_code(){
 881     log test_code "$@"
 882     check=$1
 883     headers=$2
 884     code=$3
 885     shift 3
 886     {
 887         for hdr in $headers; do
 888             print_include $hdr
 889         done
 890         echo "int main(void) { $code; return 0; }"
 891     } | test_$check "$@"
 892 }
 893
 894 check_cppflags(){
 895     log check_cppflags "$@"
 896     test_cpp "$@" <<EOF && add_cppflags "$@"
 897 #include <stdlib.h>;
 898 EOF
 899 }
 900
 901 test_cflags(){
 902     log test_cflags "$@"
 903     set -- $($cflags_filter "$@")
 904     test_cc "$@" <<EOF
 905 int x;
 906 EOF
 907 }
 908
 909 check_cflags(){
 910     log check_cflags "$@"
 911     test_cflags "$@" && add_cflags "$@"
 912 }
 913
 914 test_objcflags(){
 915     log test_objcflags "$@"
 916     set -- $($objcflags_filter "$@")
 917     test_objcc "$@" <<EOF
 918 int x;
 919 EOF
 920 }
 921
 922 check_objcflags(){
 923     log check_objcflags "$@"
 924     test_objcflags "$@" && add_objcflags "$@"
 925 }
 926
 927 test_ldflags(){
 928     log test_ldflags "$@"
 929     set -- $($ldflags_filter "$@")
 930     test_ld "$@" <<EOF
 931 int main(void){ return 0; }
 932 EOF
 933 }
 934
 935 check_ldflags(){
 936     log check_ldflags "$@"
 937     test_ldflags "$@" && add_ldflags "$@"
 938 }
 939
 940 test_stripflags(){
 941     log test_stripflags "$@"
 942     # call test_cc to get a fresh TMPO
 943     test_cc <<EOF
 944 int main(void) { return 0; }
 945 EOF
 946     test_cmd $strip $STRIPFLAGS "$@" $TMPO
 947 }
 948
 949 check_stripflags(){
 950     log check_stripflags "$@"
 951     test_stripflags "$@" && add_stripflags "$@"
 952 }
 953
 954 check_header(){
 955     log check_header "$@"
 956     headers=$1
 957     shift
 958     disable_sanitized $headers
 959     {
 960         for hdr in $headers; do
 961             print_include $hdr
 962         done
 963         echo "int x;"
 964     } | test_cpp "$@" && enable_sanitized $headers
 965 }
 966
 967 check_func(){
 968     log check_func "$@"
 969     func=$1
 970     shift
 971     disable $func
 972     test_ld "$@" <<EOF && enable $func
 973 extern int $func();
 974 int main(void){ $func(); }
 975 EOF
 976 }
 977
 978 check_mathfunc(){
 979     log check_mathfunc "$@"
 980     func=$1
 981     narg=$2
 982     shift 2
 983     test $narg = 2 && args="f, g" || args="f"
 984     disable $func
 985     test_ld "$@" <<EOF && enable $func
 986 #include <math.h>
 987 float foo(float f, float g) { return $func($args); }
 988 int main(void){ return 0; }
 989 EOF
 990 }
 991
 992 check_func_headers(){
 993     log check_func_headers "$@"
 994     headers=$1
 995     funcs=$2
 996     shift 2
 997     {
 998         for hdr in $headers; do
 999             print_include $hdr
1000         done
1001         for func in $funcs; do
1002             echo "long check_$func(void) { return (long) $func; }"
1003         done
1004         echo "int main(void) { return 0; }"
1005     } | test_ld "$@" && enable $funcs && enable_sanitized $headers
1006 }
1007
1008 test_cpp_condition(){
1009     log test_cpp_condition "$@"
1010     header=$1
1011     condition=$2
1012     shift 2
1013     test_cpp "$@" <<EOF
1014 #include <$header>
1015 #if !($condition)
1016 #error "unsatisfied condition: $condition"
1017 #endif
1018 EOF
1019 }
1020
1021 check_cpp_condition(){
1022     log check_cpp_condition "$@"
1023     name=$1
1024     shift 1
1025     disable $name
1026     test_cpp_condition "$@" && enable $name
1027 }
1028
1029 test_cflags_cpp(){
1030     log test_cflags_cpp "$@"
1031     flags=$1
1032     condition=$2
1033     shift 2
1034     set -- $($cflags_filter "$flags")
1035     test_cpp "$@" <<EOF
1036 #if !($condition)
1037 #error "unsatisfied condition: $condition"
1038 #endif
1039 EOF
1040 }
1041
1042 check_lib(){
1043     log check_lib "$@"
1044     name="$1"
1045     headers="$2"
1046     funcs="$3"
1047     shift 3
1048     disable $name
1049     check_func_headers "$headers" "$funcs" "$@" &&
1050         enable $name && eval ${name}_extralibs="\$@"
1051 }
1052
1053 test_pkg_config(){
1054     log test_pkg_config "$@"
1055     name="$1"
1056     pkg_version="$2"
1057     pkg="${2%% *}"
1058     headers="$3"
1059     funcs="$4"
1060     shift 4
1061     disable $name
1062     test_cmd $pkg_config --exists --print-errors $pkg_version || return
1063     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1064     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1065     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1066         enable $name &&
1067         set_sanitized "${name}_cflags"    $pkg_cflags &&
1068         set_sanitized "${name}_extralibs" $pkg_libs
1069 }
1070
1071 check_pkg_config(){
1072     log check_pkg_config "$@"
1073     name="$1"
1074     test_pkg_config "$@" &&
1075         eval add_cflags \$${name}_cflags
1076 }
1077
1078 test_exec(){
1079     log test_exec "$@"
1080     test_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1081 }
1082
1083 check_exec_crash(){
1084     log check_exec_crash "$@"
1085     code=$(cat)
1086
1087     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1088     # are safe but may not be available everywhere.  Thus we use
1089     # raise(SIGTERM) instead.  The check is run in a subshell so we
1090     # can redirect the "Terminated" message from the shell.  SIGBUS
1091     # is not defined by standard C so it is used conditionally.
1092
1093     (test_exec "$@") >> $logfile 2>&1 <<EOF
1094 #include <signal.h>
1095 static void sighandler(int sig){
1096     raise(SIGTERM);
1097 }
1098 int foo(void){
1099     $code
1100 }
1101 int (*func_ptr)(void) = foo;
1102 int main(void){
1103     signal(SIGILL, sighandler);
1104     signal(SIGFPE, sighandler);
1105     signal(SIGSEGV, sighandler);
1106 #ifdef SIGBUS
1107     signal(SIGBUS, sighandler);
1108 #endif
1109     return func_ptr();
1110 }
1111 EOF
1112 }
1113
1114 check_type(){
1115     log check_type "$@"
1116     headers=$1
1117     type=$2
1118     shift 2
1119     disable_sanitized "$type"
1120     test_code cc "$headers" "$type v" "$@" && enable_sanitized "$type"
1121 }
1122
1123 check_struct(){
1124     log check_struct "$@"
1125     headers=$1
1126     struct=$2
1127     member=$3
1128     shift 3
1129     disable_sanitized "${struct}_${member}"
1130     test_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1131         enable_sanitized "${struct}_${member}"
1132 }
1133
1134 check_builtin(){
1135     log check_builtin "$@"
1136     name=$1
1137     shift
1138     disable "$name"
1139     test_code ld "$@" && enable "$name"
1140 }
1141
1142 check_compile_assert(){
1143     log check_compile_assert "$@"
1144     name=$1
1145     headers=$2
1146     condition=$3
1147     shift 3
1148     disable "$name"
1149     test_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1150 }
1151
1152 check_cc(){
1153     log check_cc "$@"
1154     name=$1
1155     shift
1156     disable "$name"
1157     test_code cc "$@" && enable "$name"
1158 }
1159
1160 require(){
1161     log require "$@"
1162     name_version="$1"
1163     name="${1%% *}"
1164     shift
1165     check_lib $name "$@" || die "ERROR: $name_version not found"
1166 }
1167
1168 require_cc(){
1169     log require_cc "$@"
1170     name="$1"
1171     shift
1172     test_code cc "$@" || die "ERROR: $name failed"
1173 }
1174
1175 require_header(){
1176     log require_header "$@"
1177     headers="$1"
1178     check_header "$@" || die "ERROR: $headers not found"
1179 }
1180
1181 require_cpp_condition(){
1182     log require_cpp_condition "$@"
1183     condition="$2"
1184     test_cpp_condition "$@" || die "ERROR: $condition not satisfied"
1185 }
1186
1187 require_pkg_config(){
1188     log require_pkg_config "$@"
1189     pkg_version="$2"
1190     check_pkg_config "$@" || die "ERROR: $pkg_version not found"
1191 }
1192
1193 hostcc_e(){
1194     eval printf '%s\\n' $HOSTCC_E
1195 }
1196
1197 hostcc_o(){
1198     eval printf '%s\\n' $HOSTCC_O
1199 }
1200
1201 test_host_cc(){
1202     log test_host_cc "$@"
1203     cat > $TMPC
1204     log_file $TMPC
1205     test_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1206 }
1207
1208 test_host_cpp(){
1209     log test_host_cpp "$@"
1210     cat > $TMPC
1211     log_file $TMPC
1212     test_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1213 }
1214
1215 check_host_cppflags(){
1216     log check_host_cppflags "$@"
1217     test_host_cpp "$@" <<EOF && append host_cppflags "$@"
1218 #include <stdlib.h>;
1219 EOF
1220 }
1221
1222 check_host_cflags(){
1223     log check_host_cflags "$@"
1224     set -- $($host_cflags_filter "$@")
1225     test_host_cc "$@" <<EOF && append host_cflags "$@"
1226 int x;
1227 EOF
1228 }
1229
1230 test_host_cpp_condition(){
1231     log test_host_cpp_condition "$@"
1232     header=$1
1233     condition=$2
1234     shift 2
1235     test_host_cpp "$@" <<EOF
1236 #include <$header>
1237 #if !($condition)
1238 #error "unsatisfied condition: $condition"
1239 #endif
1240 EOF
1241 }
1242
1243 check_host_cpp_condition(){
1244     log check_host_cpp_condition "$@"
1245     name=$1
1246     shift 1
1247     disable $name
1248     test_host_cpp_condition "$@" && enable $name
1249 }
1250
1251 cp_if_changed(){
1252     cmp -s "$1" "$2" && { test "$quiet" != "yes" && echo "$2 is unchanged"; } && return
1253     mkdir -p "$(dirname $2)"
1254     cp -f "$1" "$2"
1255 }
1256
1257 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1258 # system-dependent things.
1259
1260 AVCODEC_COMPONENTS="
1261     bsfs
1262     decoders
1263     encoders
1264     hwaccels
1265     parsers
1266 "
1267
1268 AVDEVICE_COMPONENTS="
1269     indevs
1270 "
1271 AVFILTER_COMPONENTS="
1272     filters
1273 "
1274 AVFORMAT_COMPONENTS="
1275     demuxers
1276     muxers
1277     protocols
1278 "
1279
1280 COMPONENT_LIST="
1281     $AVCODEC_COMPONENTS
1282     $AVDEVICE_COMPONENTS
1283     $AVFILTER_COMPONENTS
1284     $AVFORMAT_COMPONENTS
1285 "
1286
1287 EXAMPLE_LIST="
1288     decode_audio_example
1289     decode_video_example
1290     encode_audio_example
1291     encode_video_example
1292     filter_audio_example
1293     metadata_example
1294     output_example
1295     qsvdec_example
1296     transcode_aac_example
1297 "
1298
1299 # catchall list of things that require external libs to link
1300 EXTRALIBS_LIST="
1301     cpu_init
1302     cws2fws
1303 "
1304
1305 HWACCEL_LIBRARY_NONFREE_LIST="
1306     cuda
1307     cuvid
1308     libnpp
1309 "
1310 HWACCEL_LIBRARY_LIST="
1311     $HWACCEL_LIBRARY_NONFREE_LIST
1312     amf
1313     d3d11va
1314     dxva2
1315     libmfx
1316     mmal
1317     nvenc
1318     omx
1319     vaapi
1320     vda
1321     vdpau
1322 "
1323
1324 EXTERNAL_LIBRARY_GPL_LIST="
1325     libcdio
1326     libx264
1327     libx265
1328     libxavs
1329     libxvid
1330 "
1331
1332 EXTERNAL_LIBRARY_NONFREE_LIST="
1333     libfaac
1334     libfdk_aac
1335     openssl
1336 "
1337
1338 EXTERNAL_LIBRARY_VERSION3_LIST="
1339     libopencore_amrnb
1340     libopencore_amrwb
1341     libvo_aacenc
1342     libvo_amrwbenc
1343 "
1344
1345 EXTERNAL_LIBRARY_LIST="
1346     $EXTERNAL_LIBRARY_GPL_LIST
1347     $EXTERNAL_LIBRARY_NONFREE_LIST
1348     $EXTERNAL_LIBRARY_VERSION3_LIST
1349     avisynth
1350     avxsynth
1351     frei0r
1352     gnutls
1353     libaom
1354     libbs2b
1355     libdc1394
1356     libdcadec
1357     libfontconfig
1358     libfreetype
1359     libgsm
1360     libhdcd
1361     libilbc
1362     libjack
1363     libkvazaar
1364     libmp3lame
1365     libopencv
1366     libopenh264
1367     libopenjpeg
1368     libopus
1369     libpulse
1370     librtmp
1371     libschroedinger
1372     libsnappy
1373     libspeex
1374     libtheora
1375     libtwolame
1376     libvorbis
1377     libvpx
1378     libwavpack
1379     libwebp
1380     libxcb
1381     libxcb_shm
1382     libxcb_xfixes
1383 "
1384
1385 SYSTEM_LIBRARY_LIST="
1386     bzlib
1387     zlib
1388 "
1389
1390 FEATURE_LIST="
1391     gray
1392     hardcoded_tables
1393     omx_rpi
1394     runtime_cpudetect
1395     safe_bitstream_reader
1396     shared
1397     small
1398     sram
1399     static
1400     swscale_alpha
1401 "
1402
1403 LIBRARY_LIST="
1404     avcodec
1405     avdevice
1406     avfilter
1407     avformat
1408     avresample
1409     avutil
1410     swscale
1411 "
1412
1413 LICENSE_LIST="
1414     gpl
1415     nonfree
1416     version3
1417 "
1418
1419 PROGRAM_LIST="
1420     avconv
1421     avplay
1422     avprobe
1423 "
1424
1425 SUBSYSTEM_LIST="
1426     dct
1427     doc
1428     error_resilience
1429     faan
1430     fft
1431     lsp
1432     lzo
1433     mdct
1434     network
1435     rdft
1436 "
1437
1438 # COMPONENT_LIST needs to come last to ensure correct dependency checking
1439 CONFIG_LIST="
1440     $EXAMPLE_LIST
1441     $EXTERNAL_LIBRARY_LIST
1442     $HWACCEL_LIBRARY_LIST
1443     $FEATURE_LIST
1444     $LICENSE_LIST
1445     $LIBRARY_LIST
1446     $PROGRAM_LIST
1447     $SUBSYSTEM_LIST
1448     $SYSTEM_LIBRARY_LIST
1449     neon_clobber_test
1450     pic
1451     pod2man
1452     texi2html
1453     thumb
1454     valgrind_backtrace
1455     xmm_clobber_test
1456     $COMPONENT_LIST
1457 "
1458
1459 THREADS_LIST="
1460     pthreads
1461     w32threads
1462 "
1463
1464 ATOMICS_LIST="
1465     atomics_gcc
1466     atomics_suncc
1467     atomics_win32
1468 "
1469
1470 ARCH_LIST="
1471     aarch64
1472     alpha
1473     arm
1474     avr32
1475     avr32_ap
1476     avr32_uc
1477     bfin
1478     ia64
1479     m68k
1480     mips
1481     mips64
1482     parisc
1483     ppc
1484     ppc64
1485     s390
1486     sh4
1487     sparc
1488     sparc64
1489     tilegx
1490     tilepro
1491     tomi
1492     x86
1493     x86_32
1494     x86_64
1495 "
1496
1497 ARCH_EXT_LIST_ARM="
1498     armv5te
1499     armv6
1500     armv6t2
1501     armv8
1502     neon
1503     vfp
1504     vfpv3
1505 "
1506
1507 ARCH_EXT_LIST_X86_SIMD="
1508     amd3dnow
1509     amd3dnowext
1510     avx
1511     avx2
1512     fma3
1513     fma4
1514     mmx
1515     mmxext
1516     sse
1517     sse2
1518     sse3
1519     sse4
1520     sse42
1521     ssse3
1522     xop
1523 "
1524
1525 ARCH_EXT_LIST_PPC="
1526     altivec
1527     dcbzl
1528     ldbrx
1529     power8
1530     ppc4xx
1531     vsx
1532 "
1533
1534 ARCH_EXT_LIST_X86="
1535     $ARCH_EXT_LIST_X86_SIMD
1536     cpunop
1537     i686
1538 "
1539
1540 ARCH_EXT_LIST_MIPS="
1541     loongson
1542     mips32r1
1543     mips64r1
1544     mips32r2
1545     mips64r2
1546     mips32r6
1547     mips64r6
1548 "
1549
1550 ARCH_EXT_LIST="
1551     $ARCH_EXT_LIST_ARM
1552     $ARCH_EXT_LIST_MIPS
1553     $ARCH_EXT_LIST_PPC
1554     $ARCH_EXT_LIST_X86
1555     vis
1556 "
1557
1558 ARCH_FEATURES="
1559     aligned_stack
1560     fast_64bit
1561     fast_clz
1562     fast_cmov
1563     local_aligned_8
1564     local_aligned_16
1565     local_aligned_32
1566     simd_align_16
1567     simd_align_32
1568 "
1569
1570 BUILTIN_LIST="
1571     atomic_cas_ptr
1572     machine_rw_barrier
1573     MemoryBarrier
1574     mm_empty
1575     rdtsc
1576     sem_timedwait
1577     sync_val_compare_and_swap
1578 "
1579 HAVE_LIST_CMDLINE="
1580     inline_asm
1581     symver
1582     x86asm
1583 "
1584
1585 HAVE_LIST_PUB="
1586     bigendian
1587     fast_unaligned
1588 "
1589
1590 HEADERS_LIST="
1591     AVFoundation_AVFoundation_h
1592     arpa_inet_h
1593     cdio_paranoia_h
1594     cdio_paranoia_paranoia_h
1595     dispatch_dispatch_h
1596     dev_bktr_ioctl_bt848_h
1597     dev_bktr_ioctl_meteor_h
1598     dev_ic_bt8xx_h
1599     dev_video_bktr_ioctl_bt848_h
1600     dev_video_meteor_ioctl_meteor_h
1601     direct_h
1602     dxgidebug_h
1603     dxva_h
1604     io_h
1605     machine_ioctl_bt848_h
1606     machine_ioctl_meteor_h
1607     malloc_h
1608     poll_h
1609     sys_param_h
1610     sys_resource_h
1611     sys_select_h
1612     sys_soundcard_h
1613     sys_time_h
1614     sys_un_h
1615     sys_videoio_h
1616     unistd_h
1617     valgrind_valgrind_h
1618     windows_h
1619     winsock2_h
1620 "
1621
1622 INTRINSICS_LIST="
1623     intrinsics_neon
1624 "
1625
1626 MATH_FUNCS="
1627     atanf
1628     atan2f
1629     cbrtf
1630     cosf
1631     exp2
1632     exp2f
1633     expf
1634     isinf
1635     isnan
1636     ldexpf
1637     llrint
1638     llrintf
1639     log2
1640     log2f
1641     log10f
1642     lrint
1643     lrintf
1644     powf
1645     rint
1646     round
1647     roundf
1648     sinf
1649     trunc
1650     truncf
1651 "
1652
1653 SYSTEM_FEATURES="
1654     dos_paths
1655     libc_msvcrt
1656     MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
1657     section_data_rel_ro
1658     threads
1659     uwp
1660 "
1661
1662 SYSTEM_FUNCS="
1663     aligned_malloc
1664     clock_gettime
1665     closesocket
1666     CommandLineToArgvW
1667     fcntl
1668     getaddrinfo
1669     gethrtime
1670     getopt
1671     GetProcessAffinityMask
1672     GetProcessMemoryInfo
1673     GetProcessTimes
1674     getrusage
1675     GetSystemTimeAsFileTime
1676     gettimeofday
1677     gmtime_r
1678     inet_aton
1679     isatty
1680     localtime_r
1681     mach_absolute_time
1682     MapViewOfFile
1683     memalign
1684     mmap
1685     mprotect
1686     nanosleep
1687     posix_memalign
1688     sched_getaffinity
1689     SetConsoleTextAttribute
1690     setmode
1691     setrlimit
1692     Sleep
1693     strerror_r
1694     sysconf
1695     sysctl
1696     usleep
1697     VirtualAlloc
1698 "
1699
1700 SYSTEM_LIBRARIES="
1701     sdl
1702     vaapi_1
1703     vaapi_drm
1704     vaapi_x11
1705     vdpau_x11
1706     wincrypt
1707 "
1708
1709 TOOLCHAIN_FEATURES="
1710     as_arch_directive
1711     as_fpu_directive
1712     as_func
1713     as_object_arch
1714     asm_mod_q
1715     blocks_extension
1716     ebp_available
1717     ebx_available
1718     gnu_as
1719     ibm_asm
1720     inline_asm_labels
1721     pragma_deprecated
1722     symver_asm_label
1723     symver_gnu_asm
1724     vfp_args
1725     xform_asm
1726     xmm_clobbers
1727 "
1728
1729 TYPES_LIST="
1730     CONDITION_VARIABLE_Ptr
1731     CUVIDDECODECREATEINFO_bitDepthMinus8
1732     socklen_t
1733     struct_addrinfo
1734     struct_group_source_req
1735     struct_ip_mreq_source
1736     struct_ipv6_mreq
1737     struct_pollfd
1738     struct_rusage_ru_maxrss
1739     struct_sockaddr_in6
1740     struct_sockaddr_sa_len
1741     struct_sockaddr_storage
1742     struct_v4l2_frmivalenum_discrete
1743 "
1744
1745 HAVE_LIST="
1746     $ARCH_EXT_LIST
1747     $(add_suffix _external $ARCH_EXT_LIST)
1748     $(add_suffix _inline   $ARCH_EXT_LIST)
1749     $ARCH_FEATURES
1750     $BUILTIN_LIST
1751     $HAVE_LIST_CMDLINE
1752     $HAVE_LIST_PUB
1753     $HEADERS_LIST
1754     $INTRINSICS_LIST
1755     $MATH_FUNCS
1756     $SYSTEM_FEATURES
1757     $SYSTEM_FUNCS
1758     $SYSTEM_LIBRARIES
1759     $THREADS_LIST
1760     $TOOLCHAIN_FEATURES
1761     $TYPES_LIST
1762 "
1763
1764 # options emitted with CONFIG_ prefix but not available on the command line
1765 CONFIG_EXTRA="
1766     aandcttables
1767     ac3dsp
1768     adts_header
1769     audio_frame_queue
1770     audiodsp
1771     blockdsp
1772     bswapdsp
1773     cabac
1774     cbs
1775     cbs_h264
1776     cbs_h265
1777     cbs_mpeg2
1778     dirac_parse
1779     dvprofile
1780     faandct
1781     faanidct
1782     fdctdsp
1783     flacdsp
1784     fmtconvert
1785     g722dsp
1786     gmp
1787     golomb
1788     gplv3
1789     h263dsp
1790     h264chroma
1791     h264dsp
1792     h264parse
1793     h264pred
1794     h264qpel
1795     hevcparse
1796     hpeldsp
1797     huffman
1798     huffyuvdsp
1799     huffyuvencdsp
1800     idctdsp
1801     iirfilter
1802     imdct15
1803     intrax8
1804     iso_media
1805     ividsp
1806     jpegtables
1807     lgplv3
1808     libx262
1809     libxcb_shape
1810     lpc
1811     lzf
1812     me_cmp
1813     mpeg_er
1814     mpegaudio
1815     mpegaudiodsp
1816     mpegaudioheader
1817     mpegvideo
1818     mpegvideoenc
1819     mss34dsp
1820     pixblockdsp
1821     qpeldsp
1822     qsv
1823     qsvdec
1824     qsvenc
1825     qsvvpp
1826     rangecoder
1827     riffdec
1828     riffenc
1829     rtpdec
1830     rtpenc_chain
1831     rv34dsp
1832     sinewin
1833     snappy
1834     srtp
1835     startcode
1836     texturedsp
1837     texturedspenc
1838     tpeldsp
1839     vaapi_encode
1840     vc1dsp
1841     videodsp
1842     vp3dsp
1843     vp56dsp
1844     vp8dsp
1845     wma_freqs
1846     wmv2dsp
1847 "
1848
1849 CMDLINE_SELECT="
1850     $ARCH_EXT_LIST
1851     $CONFIG_LIST
1852     $HAVE_LIST_CMDLINE
1853     $THREADS_LIST
1854     asm
1855     cross_compile
1856     debug
1857     extra_warnings
1858     logging
1859     lto
1860     optimizations
1861     rpath
1862 "
1863
1864 PATHS_LIST="
1865     bindir
1866     datadir
1867     docdir
1868     incdir
1869     libdir
1870     mandir
1871     prefix
1872     shlibdir
1873 "
1874
1875 CMDLINE_SET="
1876     $PATHS_LIST
1877     ar
1878     arch
1879     as
1880     cc
1881     objcc
1882     cpu
1883     cross_prefix
1884     custom_allocator
1885     dep_cc
1886     env
1887     extra_version
1888     host_cc
1889     host_cflags
1890     host_extralibs
1891     host_ld
1892     host_ldflags
1893     host_os
1894     ignore_tests
1895     ld
1896     logfile
1897     malloc_prefix
1898     nm
1899     optflags
1900     pkg_config
1901     pkg_config_flags
1902     samples
1903     sysinclude
1904     sysroot
1905     target_exec
1906     target_os
1907     target_path
1908     target_samples
1909     toolchain
1910     x86asmexe
1911 "
1912
1913 CMDLINE_APPEND="
1914     extra_cflags
1915     extra_objcflags
1916     host_cppflags
1917 "
1918
1919 # code dependency declarations
1920
1921 # architecture extensions
1922
1923 armv5te_deps="arm"
1924 armv6_deps="arm"
1925 armv6t2_deps="arm"
1926 armv8_deps="aarch64"
1927 neon_deps_any="aarch64 arm"
1928 intrinsics_neon_deps="neon"
1929 vfp_deps_any="aarch64 arm"
1930 vfpv3_deps="vfp"
1931
1932 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1933
1934 altivec_deps="ppc"
1935 dcbzl_deps="ppc"
1936 ldbrx_deps="ppc"
1937 ppc4xx_deps="ppc"
1938 vsx_deps="altivec"
1939 power8_deps="vsx"
1940
1941 loongson_deps="mips"
1942 mips32r1_deps="mips32"
1943 mips32r2_deps="mips32"
1944 mips32r6_deps="mips32"
1945 mips64r1_deps="mips64"
1946 mips64r2_deps="mips64"
1947 mips64r6_deps="mips64"
1948
1949 vis_deps="sparc"
1950
1951 cpunop_deps="i686"
1952 x86_64_select="i686"
1953 x86_64_suggest="fast_cmov"
1954
1955 amd3dnow_deps="mmx"
1956 amd3dnowext_deps="amd3dnow"
1957 i686_deps="x86"
1958 mmx_deps="x86"
1959 mmxext_deps="mmx"
1960 sse_deps="mmxext"
1961 sse2_deps="sse"
1962 sse3_deps="sse2"
1963 ssse3_deps="sse3"
1964 sse4_deps="ssse3"
1965 sse42_deps="sse4"
1966 avx_deps="sse42"
1967 xop_deps="avx"
1968 fma3_deps="avx"
1969 fma4_deps="avx"
1970 avx2_deps="avx"
1971
1972 mmx_external_deps="x86asm"
1973 mmx_inline_deps="inline_asm x86"
1974 mmx_suggest="mmx_external mmx_inline"
1975
1976 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1977     eval dep=\$${ext}_deps
1978     eval ${ext}_external_deps='"${dep}_external"'
1979     eval ${ext}_inline_deps='"${dep}_inline"'
1980     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1981 done
1982
1983 aligned_stack_if_any="aarch64 ppc x86"
1984 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1985 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1986 fast_unaligned_if_any="aarch64 ppc x86"
1987 simd_align_16_if_any="altivec neon sse"
1988 simd_align_32_if_any="avx"
1989
1990 # system capabilities
1991 symver_if_any="symver_asm_label symver_gnu_asm"
1992 valgrind_backtrace_conflict="optimizations"
1993 valgrind_backtrace_deps="valgrind_valgrind_h"
1994
1995 # threading support
1996 atomics_gcc_if="sync_val_compare_and_swap"
1997 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1998 atomics_win32_if="MemoryBarrier"
1999 atomics_native_if_any="$ATOMICS_LIST"
2000 w32threads_deps="atomics_native"
2001 threads_if_any="$THREADS_LIST"
2002
2003 # subsystems
2004 cbs_h264_select="cbs golomb"
2005 cbs_h265_select="cbs golomb"
2006 cbs_mpeg2_select="cbs"
2007 dct_select="rdft"
2008 dirac_parse_select="golomb"
2009 error_resilience_select="me_cmp"
2010 faandct_deps="faan"
2011 faandct_select="fdctdsp"
2012 faanidct_deps="faan"
2013 faanidct_select="idctdsp"
2014 h264dsp_select="startcode"
2015 hevcparse_select="golomb"
2016 intrax8_select="blockdsp idctdsp"
2017 mdct_select="fft"
2018 rdft_select="fft"
2019 me_cmp_select="fdctdsp idctdsp pixblockdsp"
2020 mpeg_er_select="error_resilience"
2021 mpegaudio_select="mpegaudiodsp mpegaudioheader"
2022 mpegaudiodsp_select="dct"
2023 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp mpeg_er videodsp"
2024 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
2025 vc1dsp_select="h264chroma qpeldsp startcode"
2026
2027 # decoders / encoders
2028 aac_decoder_select="adts_header imdct15 mdct sinewin"
2029 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
2030 aac_latm_decoder_select="aac_decoder aac_latm_parser"
2031 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
2032 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
2033 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
2034 adpcm_g722_decoder_select="g722dsp"
2035 adpcm_g722_encoder_select="g722dsp"
2036 aic_decoder_select="golomb idctdsp"
2037 alac_encoder_select="lpc"
2038 als_decoder_select="bswapdsp"
2039 amrnb_decoder_select="lsp"
2040 amrwb_decoder_select="lsp"
2041 amv_decoder_select="sp5x_decoder"
2042 ape_decoder_select="bswapdsp"
2043 asv1_decoder_select="blockdsp bswapdsp idctdsp"
2044 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
2045 asv2_decoder_select="blockdsp bswapdsp idctdsp"
2046 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
2047 atrac1_decoder_select="mdct sinewin"
2048 atrac3_decoder_select="mdct"
2049 atrac3p_decoder_select="mdct sinewin"
2050 bink_decoder_select="blockdsp hpeldsp"
2051 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
2052 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
2053 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
2054 clearvideo_decoder_select="idctdsp"
2055 cllc_decoder_select="bswapdsp"
2056 comfortnoise_encoder_select="lpc"
2057 cook_decoder_select="audiodsp mdct sinewin"
2058 cscd_decoder_select="lzo"
2059 cscd_decoder_suggest="zlib"
2060 dca_decoder_select="fmtconvert mdct"
2061 dds_decoder_select="texturedsp"
2062 dnxhd_decoder_select="blockdsp idctdsp"
2063 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
2064 dvvideo_decoder_select="dvprofile idctdsp"
2065 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
2066 dxa_decoder_deps="zlib"
2067 dxv_decoder_select="lzf texturedsp"
2068 eac3_decoder_select="ac3_decoder"
2069 eac3_encoder_select="ac3_encoder"
2070 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
2071 eatgq_decoder_select="aandcttables idctdsp"
2072 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
2073 exr_decoder_deps="zlib"
2074 ffv1_decoder_select="rangecoder"
2075 ffv1_encoder_select="rangecoder"
2076 ffvhuff_decoder_select="huffyuv_decoder"
2077 ffvhuff_encoder_select="huffyuv_encoder"
2078 fic_decoder_select="golomb"
2079 flac_decoder_select="flacdsp"
2080 flac_encoder_select="bswapdsp flacdsp lpc"
2081 flashsv_decoder_deps="zlib"
2082 flashsv_encoder_deps="zlib"
2083 flashsv2_decoder_deps="zlib"
2084 flv_decoder_select="h263_decoder"
2085 flv_encoder_select="h263_encoder"
2086 fourxm_decoder_select="blockdsp bswapdsp"
2087 fraps_decoder_select="bswapdsp huffman"
2088 g2m_decoder_deps="zlib"
2089 g2m_decoder_select="blockdsp idctdsp jpegtables"
2090 h261_decoder_select="mpeg_er mpegvideo"
2091 h261_encoder_select="aandcttables mpegvideoenc"
2092 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
2093 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
2094 h263i_decoder_select="h263_decoder"
2095 h263p_encoder_select="h263_encoder"
2096 h264_decoder_select="cabac golomb h264chroma h264dsp h264parse h264pred h264qpel videodsp"
2097 h264_decoder_suggest="error_resilience"
2098 hap_decoder_select="snappy texturedsp"
2099 hap_encoder_deps="libsnappy"
2100 hap_encoder_select="texturedspenc"
2101 hevc_decoder_select="bswapdsp cabac hevcparse videodsp"
2102 huffyuv_decoder_select="bswapdsp huffyuvdsp"
2103 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
2104 iac_decoder_select="imc_decoder"
2105 imc_decoder_select="bswapdsp fft mdct sinewin"
2106 indeo3_decoder_select="hpeldsp"
2107 indeo4_decoder_select="ividsp"
2108 indeo5_decoder_select="ividsp"
2109 interplay_video_decoder_select="hpeldsp"
2110 jpegls_decoder_select="mjpeg_decoder"
2111 jv_decoder_select="blockdsp"
2112 lagarith_decoder_select="huffyuvdsp"
2113 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
2114 magicyuv_decoder_select="huffyuvdsp"
2115 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2116 metasound_decoder_select="lsp mdct sinewin"
2117 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2118 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
2119 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
2120 mjpegb_decoder_select="mjpeg_decoder"
2121 mlp_decoder_select="mlp_parser"
2122 motionpixels_decoder_select="bswapdsp"
2123 mp1_decoder_select="mpegaudio"
2124 mp1float_decoder_select="mpegaudio"
2125 mp2_decoder_select="mpegaudio"
2126 mp2float_decoder_select="mpegaudio"
2127 mp3_decoder_select="mpegaudio"
2128 mp3adu_decoder_select="mpegaudio"
2129 mp3adufloat_decoder_select="mpegaudio"
2130 mp3float_decoder_select="mpegaudio"
2131 mp3on4_decoder_select="mpegaudio"
2132 mp3on4float_decoder_select="mpegaudio"
2133 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2134 mpc8_decoder_select="mpegaudiodsp"
2135 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2136 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2137 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2138 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2139 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2140 mpeg4_encoder_select="h263_encoder"
2141 msa1_decoder_select="mss34dsp"
2142 msmpeg4v1_decoder_select="h263_decoder"
2143 msmpeg4v2_decoder_select="h263_decoder"
2144 msmpeg4v2_encoder_select="h263_encoder"
2145 msmpeg4v3_decoder_select="h263_decoder"
2146 msmpeg4v3_encoder_select="h263_encoder"
2147 mss2_decoder_select="error_resilience mpeg_er mpegvideo qpeldsp vc1_decoder"
2148 mts2_decoder_select="mss34dsp"
2149 mxpeg_decoder_select="mjpeg_decoder"
2150 nellymoser_decoder_select="mdct sinewin"
2151 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2152 nuv_decoder_select="idctdsp lzo"
2153 on2avc_decoder_select="mdct"
2154 opus_decoder_deps="avresample"
2155 opus_decoder_select="imdct15"
2156 png_decoder_deps="zlib"
2157 png_encoder_deps="zlib"
2158 png_encoder_select="huffyuvencdsp"
2159 prores_decoder_select="idctdsp"
2160 prores_encoder_select="fdctdsp"
2161 qcelp_decoder_select="lsp"
2162 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2163 ra_144_encoder_select="audio_frame_queue lpc"
2164 ralf_decoder_select="golomb"
2165 rscc_decoder_deps="zlib"
2166 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2167 rv10_encoder_select="h263_encoder"
2168 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2169 rv20_encoder_select="h263_encoder"
2170 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2171 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2172 screenpresso_decoder_deps="zlib"
2173 sipr_decoder_select="lsp"
2174 sp5x_decoder_select="mjpeg_decoder"
2175 svq1_decoder_select="hpeldsp"
2176 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2177 svq3_decoder_select="golomb h264dsp h264parse h264pred hpeldsp tpeldsp videodsp"
2178 svq3_decoder_suggest="zlib"
2179 tak_decoder_select="audiodsp"
2180 tdsc_decoder_deps="zlib"
2181 tdsc_decoder_select="mjpeg_decoder"
2182 theora_decoder_select="vp3_decoder"
2183 thp_decoder_select="mjpeg_decoder"
2184 tiff_decoder_suggest="zlib"
2185 tiff_encoder_suggest="zlib"
2186 truehd_decoder_select="mlp_decoder"
2187 truemotion2_decoder_select="bswapdsp"
2188 truespeech_decoder_select="bswapdsp"
2189 tscc_decoder_deps="zlib"
2190 txd_decoder_select="texturedsp"
2191 twinvq_decoder_select="mdct lsp sinewin"
2192 utvideo_decoder_select="bswapdsp huffyuvdsp"
2193 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2194 vble_decoder_select="huffyuvdsp"
2195 vc1_decoder_select="blockdsp error_resilience h263_decoder h264qpel intrax8 mpeg_er mpegvideo vc1dsp"
2196 vc1image_decoder_select="vc1_decoder"
2197 vorbis_decoder_select="mdct"
2198 vorbis_encoder_select="mdct"
2199 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2200 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2201 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2202 vp6a_decoder_select="vp6_decoder"
2203 vp6f_decoder_select="vp6_decoder"
2204 vp7_decoder_select="h264pred videodsp vp8dsp"
2205 vp8_decoder_select="h264pred videodsp vp8dsp"
2206 vp9_decoder_select="videodsp vp9_superframe_split_bsf"
2207 webp_decoder_select="vp8_decoder"
2208 wmapro_decoder_select="mdct sinewin wma_freqs"
2209 wmav1_decoder_select="mdct sinewin wma_freqs"
2210 wmav1_encoder_select="mdct sinewin wma_freqs"
2211 wmav2_decoder_select="mdct sinewin wma_freqs"
2212 wmav2_encoder_select="mdct sinewin wma_freqs"
2213 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2214 wmv1_decoder_select="h263_decoder"
2215 wmv1_encoder_select="h263_encoder"
2216 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2217 wmv2_encoder_select="h263_encoder wmv2dsp"
2218 wmv3_decoder_select="vc1_decoder"
2219 wmv3image_decoder_select="wmv3_decoder"
2220 zerocodec_decoder_deps="zlib"
2221 zlib_decoder_deps="zlib"
2222 zlib_encoder_deps="zlib"
2223 zmbv_decoder_deps="zlib"
2224 zmbv_encoder_deps="zlib"
2225
2226 # hardware accelerators
2227 d3d11va_deps="dxva_h ID3D11VideoDecoder"
2228 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode ole32"
2229 vda_deps="VideoDecodeAcceleration_VDADecoder_h blocks_extension pthreads"
2230 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2231
2232 h263_vaapi_hwaccel_deps="vaapi"
2233 h263_vaapi_hwaccel_select="h263_decoder"
2234 h264_cuvid_hwaccel_deps="cuvid CUVIDH264PICPARAMS"
2235 h264_cuvid_hwaccel_select="h264_decoder"
2236 h264_d3d11va_hwaccel_deps="d3d11va"
2237 h264_d3d11va_hwaccel_select="h264_decoder"
2238 h264_d3d11va2_hwaccel_deps="d3d11va"
2239 h264_d3d11va2_hwaccel_select="h264_decoder"
2240 h264_dxva2_hwaccel_deps="dxva2"
2241 h264_dxva2_hwaccel_select="h264_decoder"
2242 h264_vaapi_hwaccel_deps="vaapi"
2243 h264_vaapi_hwaccel_select="h264_decoder"
2244 h264_vda_hwaccel_deps="vda"
2245 h264_vda_hwaccel_select="h264_decoder"
2246 h264_vda_old_hwaccel_deps="vda"
2247 h264_vda_old_hwaccel_select="h264_decoder"
2248 h264_vdpau_hwaccel_deps="vdpau"
2249 h264_vdpau_hwaccel_select="h264_decoder"
2250 hevc_cuvid_hwaccel_deps="cuvid CUVIDHEVCPICPARAMS"
2251 hevc_cuvid_hwaccel_select="hevc_decoder"
2252 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2253 hevc_d3d11va_hwaccel_select="hevc_decoder"
2254 hevc_d3d11va2_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2255 hevc_d3d11va2_hwaccel_select="hevc_decoder"
2256 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2257 hevc_dxva2_hwaccel_select="hevc_decoder"
2258 hevc_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferHEVC"
2259 hevc_vaapi_hwaccel_select="hevc_decoder"
2260 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2261 hevc_vdpau_hwaccel_select="hevc_decoder"
2262 mpeg1_vdpau_hwaccel_deps="vdpau"
2263 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2264 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2265 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2266 mpeg2_d3d11va2_hwaccel_deps="d3d11va"
2267 mpeg2_d3d11va2_hwaccel_select="mpeg2video_decoder"
2268 mpeg2_dxva2_hwaccel_deps="dxva2"
2269 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2270 mpeg2_vaapi_hwaccel_deps="vaapi"
2271 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2272 mpeg2_vdpau_hwaccel_deps="vdpau"
2273 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2274 mpeg4_vaapi_hwaccel_deps="vaapi"
2275 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2276 mpeg4_vdpau_hwaccel_deps="vdpau"
2277 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2278 vc1_d3d11va_hwaccel_deps="d3d11va"
2279 vc1_d3d11va_hwaccel_select="vc1_decoder"
2280 vc1_d3d11va2_hwaccel_deps="d3d11va"
2281 vc1_d3d11va2_hwaccel_select="vc1_decoder"
2282 vc1_dxva2_hwaccel_deps="dxva2"
2283 vc1_dxva2_hwaccel_select="vc1_decoder"
2284 vc1_vaapi_hwaccel_deps="vaapi"
2285 vc1_vaapi_hwaccel_select="vc1_decoder"
2286 vc1_vdpau_hwaccel_deps="vdpau"
2287 vc1_vdpau_hwaccel_select="vc1_decoder"
2288 vp8_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferVP8"
2289 vp8_vaapi_hwaccel_select="vp8_decoder"
2290 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2291 wmv3_d3d11va2_hwaccel_select="vc1_d3d11va2_hwaccel"
2292 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2293 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2294 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2295
2296 # hardware-accelerated codecs
2297 amf_deps_any="libdl LoadLibrary"
2298 nvenc_deps_any="libdl LoadLibrary"
2299 omx_deps="libdl pthreads"
2300 omx_rpi_select="omx"
2301 qsv_deps="libmfx"
2302 qsvdec_select="qsv"
2303 qsvenc_select="qsv"
2304 qsvvpp_select="qsv"
2305 vaapi_encode_deps="vaapi"
2306
2307 hwupload_cuda_filter_deps="cuda"
2308 scale_npp_filter_deps="cuda libnpp"
2309
2310 h264_amf_encoder_deps="amf"
2311 h264_mmal_decoder_deps="mmal"
2312 h264_nvenc_encoder_deps="nvenc"
2313 h264_omx_encoder_deps="omx"
2314 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec"
2315 h264_qsv_encoder_select="qsvenc"
2316 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
2317 h264_vaapi_encoder_select="cbs_h264 vaapi_encode"
2318 hevc_amf_encoder_deps="amf"
2319 hevc_nvenc_encoder_deps="nvenc"
2320 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser qsvdec"
2321 hevc_qsv_encoder_select="hevcparse qsvenc"
2322 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
2323 hevc_vaapi_encoder_select="cbs_h265 vaapi_encode"
2324 mjpeg_qsv_encoder_deps="libmfx"
2325 mjpeg_qsv_encoder_select="qsvenc"
2326 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
2327 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
2328 mpeg2_mmal_decoder_deps="mmal"
2329 mpeg2_qsv_decoder_select="qsvdec mpegvideo_parser"
2330 mpeg2_qsv_encoder_select="qsvenc"
2331 mpeg2_vaapi_encoder_deps="VAEncPictureParameterBufferMPEG2"
2332 mpeg2_vaapi_encoder_select="cbs_mpeg2 vaapi_encode"
2333 mpeg4_omx_encoder_deps="omx"
2334 vc1_mmal_decoder_deps="mmal"
2335 vc1_qsv_decoder_select="qsvdec vc1_parser"
2336 vp8_qsv_decoder_select="qsvdec vp8_parser"
2337 vp8_vaapi_encoder_deps="VAEncPictureParameterBufferVP8"
2338 vp8_vaapi_encoder_select="vaapi_encode"
2339 vp9_vaapi_encoder_deps="VAEncPictureParameterBufferVP9"
2340 vp9_vaapi_encoder_select="vaapi_encode"
2341
2342 nvenc_h264_encoder_select="h264_nvenc_encoder"
2343 nvenc_hevc_encoder_select="hevc_nvenc_encoder"
2344
2345 # parsers
2346 aac_parser_select="adts_header"
2347 h264_parser_select="golomb h264dsp h264parse"
2348 hevc_parser_select="hevcparse"
2349 mpegaudio_parser_select="mpegaudioheader"
2350 mpegvideo_parser_select="mpegvideo"
2351 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2352 vc1_parser_select="vc1dsp"
2353
2354 # bitstream_filters
2355 aac_adtstoasc_bsf_select="adts_header"
2356 h264_metadata_bsf_select="cbs_h264"
2357 h264_redundant_pps_bsf_select="cbs_h264"
2358 hevc_metadata_bsf_select="cbs_h265"
2359 mjpeg2jpeg_bsf_select="jpegtables"
2360 mpeg2_metadata_bsf_select="cbs_mpeg2"
2361 trace_headers_bsf_select="cbs_h264 cbs_h265 cbs_mpeg2"
2362
2363 # external libraries
2364 avisynth_deps="LoadLibrary"
2365 avxsynth_deps="libdl"
2366 avisynth_demuxer_deps_any="avisynth avxsynth"
2367 avisynth_demuxer_select="riffdec"
2368 libaom_av1_decoder_deps="libaom"
2369 libdcadec_decoder_deps="libdcadec"
2370 libfaac_encoder_deps="libfaac"
2371 libfaac_encoder_select="audio_frame_queue"
2372 libfdk_aac_decoder_deps="libfdk_aac"
2373 libfdk_aac_encoder_deps="libfdk_aac"
2374 libfdk_aac_encoder_select="audio_frame_queue"
2375 libgsm_decoder_deps="libgsm"
2376 libgsm_encoder_deps="libgsm"
2377 libgsm_ms_decoder_deps="libgsm"
2378 libgsm_ms_encoder_deps="libgsm"
2379 libilbc_decoder_deps="libilbc"
2380 libilbc_encoder_deps="libilbc"
2381 libkvazaar_encoder_deps="libkvazaar"
2382 libmp3lame_encoder_deps="libmp3lame"
2383 libmp3lame_encoder_select="audio_frame_queue mpegaudioheader"
2384 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2385 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2386 libopencore_amrnb_encoder_select="audio_frame_queue"
2387 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2388 libopenh264_decoder_deps="libopenh264"
2389 libopenh264_decoder_select="h264_mp4toannexb_bsf"
2390 libopenh264_encoder_deps="libopenh264"
2391 libopenjpeg_decoder_deps="libopenjpeg"
2392 libopenjpeg_encoder_deps="libopenjpeg"
2393 libopus_decoder_deps="libopus"
2394 libopus_encoder_deps="libopus"
2395 libopus_encoder_select="audio_frame_queue"
2396 libschroedinger_decoder_deps="libschroedinger"
2397 libschroedinger_encoder_deps="libschroedinger"
2398 libspeex_decoder_deps="libspeex"
2399 libspeex_encoder_deps="libspeex"
2400 libspeex_encoder_select="audio_frame_queue"
2401 libtheora_encoder_deps="libtheora"
2402 libtwolame_encoder_deps="libtwolame"
2403 libvo_aacenc_encoder_deps="libvo_aacenc"
2404 libvo_aacenc_encoder_select="audio_frame_queue"
2405 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2406 libvorbis_encoder_deps="libvorbis"
2407 libvorbis_encoder_select="audio_frame_queue"
2408 libvpx_vp8_decoder_deps="libvpx"
2409 libvpx_vp8_encoder_deps="libvpx"
2410 libvpx_vp9_decoder_deps="libvpx"
2411 libvpx_vp9_encoder_deps="libvpx"
2412 libwavpack_encoder_deps="libwavpack"
2413 libwavpack_encoder_select="audio_frame_queue"
2414 libwebp_encoder_deps="libwebp"
2415 libx262_encoder_deps="libx262"
2416 libx264_encoder_deps="libx264"
2417 libx265_encoder_deps="libx265"
2418 libxavs_encoder_deps="libxavs"
2419 libxvid_encoder_deps="libxvid mkstemp"
2420
2421 # demuxers / muxers
2422 ac3_demuxer_select="ac3_parser"
2423 asf_demuxer_select="riffdec"
2424 asf_muxer_select="riffenc"
2425 asf_stream_muxer_select="asf_muxer"
2426 avi_demuxer_select="iso_media riffdec"
2427 avi_muxer_select="riffenc"
2428 caf_demuxer_select="iso_media riffdec"
2429 dash_muxer_select="mp4_muxer"
2430 dirac_demuxer_select="dirac_parser"
2431 dv_demuxer_select="dvprofile"
2432 dv_muxer_select="dvprofile"
2433 dxa_demuxer_select="riffdec"
2434 eac3_demuxer_select="ac3_parser"
2435 f4v_muxer_select="mov_muxer"
2436 flac_demuxer_select="flac_parser"
2437 hds_muxer_select="flv_muxer"
2438 hls_muxer_select="mpegts_muxer"
2439 ipod_muxer_select="mov_muxer"
2440 ismv_muxer_select="mov_muxer"
2441 matroska_audio_muxer_select="matroska_muxer"
2442 matroska_demuxer_select="iso_media riffdec"
2443 matroska_demuxer_suggest="bzlib lzo zlib"
2444 matroska_muxer_select="iso_media riffenc"
2445 mmf_muxer_select="riffenc"
2446 mov_demuxer_select="iso_media riffdec"
2447 mov_demuxer_suggest="zlib"
2448 mov_muxer_select="iso_media riffenc rtpenc_chain"
2449 mp3_demuxer_select="mpegaudio_parser"
2450 mp3_muxer_select="mpegaudioheader"
2451 mp4_muxer_select="mov_muxer"
2452 mpegts_demuxer_select="iso_media"
2453 mpegts_muxer_select="adts_muxer latm_muxer"
2454 mpegtsraw_demuxer_select="mpegts_demuxer"
2455 mxf_d10_muxer_select="mxf_muxer"
2456 nut_muxer_select="riffenc"
2457 nuv_demuxer_select="riffdec"
2458 oga_muxer_select="ogg_muxer"
2459 ogg_demuxer_select="dirac_parse"
2460 opus_muxer_select="ogg_muxer"
2461 psp_muxer_select="mov_muxer"
2462 rtp_demuxer_select="sdp_demuxer"
2463 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2464 rtsp_demuxer_select="http_protocol rtpdec"
2465 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2466 sap_demuxer_select="sdp_demuxer"
2467 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2468 sdp_demuxer_select="rtpdec"
2469 smoothstreaming_muxer_select="ismv_muxer"
2470 spdif_demuxer_select="adts_header"
2471 spdif_muxer_select="adts_header"
2472 spx_muxer_select="ogg_muxer"
2473 swf_demuxer_suggest="zlib"
2474 tak_demuxer_select="tak_parser"
2475 tg2_muxer_select="mov_muxer"
2476 tgp_muxer_select="mov_muxer"
2477 w64_demuxer_select="wav_demuxer"
2478 wav_demuxer_select="riffdec"
2479 wav_muxer_select="riffenc"
2480 webm_muxer_select="iso_media riffenc"
2481 wtv_demuxer_select="mpegts_demuxer riffdec"
2482 xmv_demuxer_select="riffdec"
2483 xwma_demuxer_select="riffdec"
2484
2485 # indevs
2486 alsa_indev_deps="alsa"
2487 avfoundation_indev_deps="AVFoundation_AVFoundation_h objc_arc pthreads"
2488 avfoundation_indev_extralibs="-framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia"
2489 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2490 fbdev_indev_deps="linux_fb_h"
2491 jack_indev_deps="libjack"
2492 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
2493 libcdio_indev_deps="libcdio"
2494 libdc1394_indev_deps="libdc1394"
2495 oss_indev_deps_any="sys_soundcard_h"
2496 pulse_indev_deps="libpulse"
2497 sndio_indev_deps="sndio"
2498 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2499 vfwcap_indev_deps="vfw32 vfwcap_defines"
2500 xcbgrab_indev_deps="libxcb libxcb_shape"
2501 xcbgrab_indev_suggest="libxcb_shm libxcb_xfixes"
2502
2503 # protocols
2504 ffrtmpcrypt_protocol_conflict="librtmp_protocol"
2505 ffrtmpcrypt_protocol_deps_any="gmp openssl"
2506 ffrtmpcrypt_protocol_select="tcp_protocol"
2507 ffrtmphttp_protocol_conflict="librtmp_protocol"
2508 ffrtmphttp_protocol_select="http_protocol"
2509 gopher_protocol_select="network"
2510 http_protocol_select="tcp_protocol"
2511 http_protocol_suggest="zlib"
2512 httpproxy_protocol_select="tcp_protocol"
2513 httpproxy_protocol_suggest="zlib"
2514 https_protocol_select="tls_protocol"
2515 https_protocol_suggest="zlib"
2516 icecast_protocol_select="http_protocol"
2517 librtmp_protocol_deps="librtmp"
2518 librtmpe_protocol_deps="librtmp"
2519 librtmps_protocol_deps="librtmp"
2520 librtmpt_protocol_deps="librtmp"
2521 librtmpte_protocol_deps="librtmp"
2522 mmsh_protocol_select="http_protocol"
2523 mmst_protocol_select="network"
2524 rtmp_protocol_conflict="librtmp_protocol"
2525 rtmp_protocol_select="tcp_protocol"
2526 rtmp_protocol_suggest="zlib"
2527 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2528 rtmpe_protocol_suggest="zlib"
2529 rtmps_protocol_conflict="librtmp_protocol"
2530 rtmps_protocol_select="tls_protocol"
2531 rtmps_protocol_suggest="zlib"
2532 rtmpt_protocol_select="ffrtmphttp_protocol"
2533 rtmpt_protocol_suggest="zlib"
2534 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2535 rtmpte_protocol_suggest="zlib"
2536 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2537 rtmpts_protocol_suggest="zlib"
2538 rtp_protocol_select="udp_protocol"
2539 sctp_protocol_deps="struct_sctp_event_subscribe"
2540 sctp_protocol_select="network"
2541 srtp_protocol_select="rtp_protocol srtp"
2542 tcp_protocol_select="network"
2543 tls_protocol_deps_any="gnutls openssl"
2544 tls_protocol_select="tcp_protocol"
2545 udp_protocol_select="network"
2546 unix_protocol_deps="sys_un_h"
2547 unix_protocol_select="network"
2548
2549 # filters
2550 asyncts_filter_deps="avresample"
2551 blackframe_filter_deps="gpl"
2552 boxblur_filter_deps="gpl"
2553 bs2b_filter_deps="libbs2b"
2554 cropdetect_filter_deps="gpl"
2555 deinterlace_qsv_filter_deps="libmfx"
2556 deinterlace_vaapi_filter_deps="vaapi"
2557 delogo_filter_deps="gpl"
2558 drawtext_filter_deps="libfreetype"
2559 drawtext_filter_suggest="libfontconfig"
2560 frei0r_filter_deps="frei0r libdl"
2561 frei0r_src_filter_deps="frei0r libdl"
2562 hdcd_filter_deps="libhdcd"
2563 hqdn3d_filter_deps="gpl"
2564 interlace_filter_deps="gpl"
2565 movie_filter_deps="avcodec avformat"
2566 ocv_filter_deps="libopencv"
2567 overlay_qsv_filter_deps="libmfx"
2568 overlay_qsv_filter_select="qsvvpp"
2569 resample_filter_deps="avresample"
2570 scale_filter_deps="swscale"
2571 scale_qsv_filter_deps="libmfx"
2572 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2573 vpp_qsv_filter_deps="libmfx"
2574 vpp_qsv_filter_select="qsvvpp"
2575
2576 # examples
2577 decode_audio_example_deps="avcodec avutil"
2578 decode_video_example_deps="avcodec avutil"
2579 encode_audio_example_deps="avcodec avutil"
2580 encode_video_example_deps="avcodec avutil"
2581 filter_audio_example_deps="avfilter avutil"
2582 metadata_example_deps="avformat avutil"
2583 output_example_deps="avcodec avformat avresample avutil swscale"
2584 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder"
2585 transcode_aac_example_deps="avcodec avformat avresample"
2586
2587 # EXTRALIBS_LIST
2588 cpu_init_extralibs="pthreads_extralibs"
2589 cws2fws_extralibs="zlib_extralibs"
2590
2591 # libraries, in linking order
2592 avcodec_deps="avutil"
2593 avcodec_select="null_bsf"
2594 avdevice_deps="avformat avcodec avutil"
2595 avfilter_deps="avutil"
2596 avformat_deps="avcodec avutil"
2597 avformat_suggest="network"
2598 avresample_deps="avutil"
2599 swscale_deps="avutil"
2600
2601 avcodec_extralibs="pthreads_extralibs libm_extralibs"
2602 avdevice_extralibs="libm_extralibs"
2603 avformat_extralibs="libm_extralibs"
2604 avfilter_extralibs="pthreads_extralibs libm_extralibs"
2605 avresample_extralibs="libm_extralibs"
2606 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"
2607 swscale_extralibs="libm_extralibs"
2608
2609 # programs
2610 avconv_deps="avcodec avfilter avformat avresample swscale"
2611 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2612                fps_filter null_filter resample_filter scale_filter
2613                trim_filter"
2614 avconv_suggest="psapi shell32"
2615 avplay_deps="avcodec avfilter avformat avresample sdl"
2616 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2617 avplay_suggest="shell32"
2618 avprobe_deps="avcodec avformat"
2619 avprobe_suggest="shell32"
2620
2621 # documentation
2622 pod2man_deps="doc"
2623 texi2html_deps="doc"
2624
2625 # default parameters
2626
2627 logfile="avbuild/config.log"
2628
2629 # installation paths
2630 prefix_default="/usr/local"
2631 bindir_default='${prefix}/bin'
2632 datadir_default='${prefix}/share/avconv'
2633 docdir_default='${prefix}/share/doc/libav'
2634 incdir_default='${prefix}/include'
2635 libdir_default='${prefix}/lib'
2636 mandir_default='${prefix}/share/man'
2637 shlibdir_default="$libdir_default"
2638
2639 # toolchain
2640 ar_default="ar"
2641 cc_default="gcc"
2642 host_cc_default="gcc"
2643 x86asmexe_default="nasm"
2644 ln_s="ln -s -f"
2645 nm_default="nm -g"
2646 pkg_config_default=pkg-config
2647 ranlib="ranlib"
2648 strip="strip"
2649 version_script='--version-script'
2650 objformat="elf32"
2651
2652 # machine
2653 arch_default=$(uname -m)
2654 cpu="generic"
2655 intrinsics="none"
2656
2657 # OS
2658 target_os_default=$(tolower $(uname -s))
2659 host_os=$target_os_default
2660
2661 # configurable options
2662 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2663
2664 enable asm
2665 enable debug
2666 enable doc
2667 enable faan faandct faanidct
2668 enable optimizations
2669 enable safe_bitstream_reader
2670 enable static
2671 enable swscale_alpha
2672 enable valgrind_backtrace
2673
2674 # By default, enable only those hwaccels that have no external dependencies.
2675 enable d3d11va dxva2 vda vdpau
2676
2677 # internal components are enabled by default
2678 enable $EXTRALIBS_LIST
2679
2680 # Avoid external, non-system, libraries getting enabled by dependency resolution
2681 disable $EXTERNAL_LIBRARY_LIST
2682
2683 # build settings
2684 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2685 LIBPREF="lib"
2686 LIBSUF=".a"
2687 LIBNAME='$(LIBPREF)$(NAME)$(LIBSUF)'
2688 SLIBPREF="lib"
2689 SLIBSUF=".so"
2690 SLIBNAME='$(SLIBPREF)$(NAME)$(SLIBSUF)'
2691 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2692 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2693 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2694 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2695 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2696 VERSION_SCRIPT_POSTPROCESS_CMD="cat"
2697
2698 asflags_filter=echo
2699 cflags_filter=echo
2700 ldflags_filter=echo
2701
2702 AS_C='-c'
2703 AS_O='-o $@'
2704 CC_C='-c'
2705 CC_E='-E -o $@'
2706 CC_O='-o $@'
2707 OBJCC_C='-c'
2708 OBJCC_E='-E -o $@'
2709 OBJCC_O='-o $@'
2710 X86ASM_O='-o $@'
2711 LD_O='-o $@'
2712 LD_LIB='-l%'
2713 LD_PATH='-L'
2714 HOSTCC_C='-c'
2715 HOSTCC_E='-E -o $@'
2716 HOSTCC_O='-o $@'
2717 HOSTLD_O='-o $@'
2718
2719 host_extralibs='-lm'
2720 host_cflags_filter=echo
2721 host_ldflags_filter=echo
2722
2723 target_path='$(CURDIR)'
2724
2725 # since the object filename is not given with the -MM flag, the compiler
2726 # is only able to print the basename, and we must add the path ourselves
2727 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2728 DEPFLAGS='-MM'
2729
2730 mkdir -p avbuild
2731
2732 # find source path
2733 if test -f configure; then
2734     source_path=.
2735 else
2736     source_path=$(cd $(dirname "$0"); pwd)
2737     echo "$source_path" | grep -q '[[:blank:]]' &&
2738         die "Out of tree builds are impossible with whitespace in source path."
2739     test -e "$source_path/config.h" &&
2740         die "Out of tree builds are impossible with config.h in source dir."
2741 fi
2742
2743 for v in "$@"; do
2744     r=${v#*=}
2745     l=${v%"$r"}
2746     r=$(sh_quote "$r")
2747     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2748 done
2749
2750 find_things(){
2751     thing=$1
2752     pattern=$2
2753     file=$source_path/$3
2754     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2755 }
2756
2757 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2758 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2759 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2760 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2761 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2762 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2763 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2764
2765 find_things_extern(){
2766     thing=$1
2767     pattern=$2
2768     file=$source_path/$3
2769     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2770 }
2771
2772 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2773 HWACCEL_LIST=$(find_things_extern hwaccel AVHWAccel libavcodec/hwaccels.h)
2774 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2775
2776 AVCODEC_COMPONENTS_LIST="
2777     $BSF_LIST
2778     $DECODER_LIST
2779     $ENCODER_LIST
2780     $HWACCEL_LIST
2781     $PARSER_LIST
2782 "
2783
2784 AVDEVICE_COMPONENTS_LIST="
2785     $INDEV_LIST
2786 "
2787
2788 AVFILTER_COMPONENTS_LIST="
2789     $FILTER_LIST
2790 "
2791
2792 AVFORMAT_COMPONENTS_LIST="
2793     $DEMUXER_LIST
2794     $MUXER_LIST
2795     $PROTOCOL_LIST
2796 "
2797
2798 ALL_COMPONENTS="
2799     $AVCODEC_COMPONENTS_LIST
2800     $AVDEVICE_COMPONENTS_LIST
2801     $AVFILTER_COMPONENTS_LIST
2802     $AVFORMAT_COMPONENTS_LIST
2803 "
2804
2805 for n in $COMPONENT_LIST; do
2806     v=$(toupper ${n%s})_LIST
2807     eval enable \$$v
2808     eval ${n}_if_any="\$$v"
2809 done
2810
2811 enable $ARCH_EXT_LIST
2812
2813 die_unknown(){
2814     echo "Unknown option \"$1\"."
2815     echo "See $0 --help for available options."
2816     exit 1
2817 }
2818
2819 print_3_columns() {
2820     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2821 }
2822
2823 show_list() {
2824     suffix=_$1
2825     shift
2826     echo $* | sed s/$suffix//g | print_3_columns
2827     exit 0
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 $INDEV_LIST
2847         ;;
2848         --enable-debug=*)
2849             debuglevel="$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-*=*|--disable-*=*)
2862             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2863             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2864             eval list=\$$(toupper $thing)_LIST
2865             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2866             $action $(filter "$name" $list)
2867         ;;
2868         --enable-yasm|--disable-yasm)
2869             warn "The ${opt} option is only provided for compatibility and will be\n"\
2870                  "removed in the future. Use --enable-x86asm / --disable-x86asm instead."
2871             test $opt = --enable-yasm && x86asm=yes || x86asm=no
2872         ;;
2873         --enable-?*|--disable-?*)
2874             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2875             if is_in $option $COMPONENT_LIST; then
2876                 test $action = disable && action=unset
2877                 eval $action \$$(toupper ${option%s})_LIST
2878             elif is_in $option $CMDLINE_SELECT; then
2879                 $action $option
2880             else
2881                 die_unknown $opt
2882             fi
2883         ;;
2884         --list-*)
2885             NAME="${opt#--list-}"
2886             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2887             NAME=${NAME%s}
2888             eval show_list $NAME \$$(toupper $NAME)_LIST
2889         ;;
2890         --help|-h) show_help
2891         ;;
2892         --quiet|-q) quiet=yes
2893         ;;
2894         *)
2895             optname="${opt%%=*}"
2896             optname="${optname#--}"
2897             optname=$(echo "$optname" | sed 's/-/_/g')
2898             if is_in $optname $CMDLINE_SET; then
2899                 eval $optname='$optval'
2900             elif is_in $optname $CMDLINE_APPEND; then
2901                 append $optname "$optval"
2902             else
2903                 die_unknown $opt
2904             fi
2905         ;;
2906     esac
2907 done
2908
2909 for e in $env; do
2910     eval "export $e"
2911 done
2912
2913 disabled logging && logfile=/dev/null
2914
2915 # command line configuration sanity checks
2916
2917 # we need to build at least one lib type
2918 if ! enabled_any static shared; then
2919     cat <<EOF
2920 At least one library type must be built.
2921 Specify --enable-static to build the static libraries or --enable-shared to
2922 build the shared libraries as well. To only build the shared libraries specify
2923 --disable-static in addition to --enable-shared.
2924 EOF
2925     exit 1
2926 fi
2927
2928 # Die early if licensing-related configure options are incompatible.
2929 die_license_disabled() {
2930     enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
2931 }
2932
2933 map "die_license_disabled gpl"      $EXTERNAL_LIBRARY_GPL_LIST
2934 map "die_license_disabled nonfree"  $EXTERNAL_LIBRARY_NONFREE_LIST $HWACCEL_LIBRARY_NONFREE_LIST
2935 map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST
2936
2937 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
2938
2939 if enabled nonfree; then
2940     license="nonfree and unredistributable"
2941 elif enabled gplv3; then
2942     license="GPL version 3 or later"
2943 elif enabled lgplv3; then
2944     license="LGPL version 3 or later"
2945 elif enabled gpl; then
2946     license="GPL version 2 or later"
2947 else
2948     license="LGPL version 2.1 or later"
2949 fi
2950
2951 enabled_all gnutls openssl &&
2952     die "GnuTLS and OpenSSL must not be enabled at the same time."
2953
2954 # Disable all the library-specific components if the library itself
2955 # is disabled, see AVCODEC_LIST and following _LIST variables.
2956
2957 disable_components(){
2958     disabled ${1} && disable $(
2959         eval components="\$$(toupper ${1})_COMPONENTS"
2960         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2961     )
2962 }
2963
2964 map 'disable_components $v' $LIBRARY_LIST
2965
2966 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2967 set >> $logfile
2968
2969 case "$toolchain" in
2970     *-asan)
2971         cc_default="${toolchain%-asan}"
2972         add_cflags  -fsanitize=address
2973         add_ldflags -fsanitize=address
2974     ;;
2975     *-msan)
2976         cc_default="${toolchain%-msan}"
2977         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2978         add_ldflags -fsanitize=memory
2979     ;;
2980     *-tsan)
2981         cc_default="${toolchain%-tsan}"
2982         add_cflags  -fsanitize=thread -fPIE
2983         add_ldflags -fsanitize=thread -pie
2984         case "$toolchain" in
2985             gcc-tsan)
2986                 add_cflags  -fPIC
2987                 add_ldflags -fPIC
2988                 ;;
2989         esac
2990     ;;
2991     *-usan)
2992         cc_default="${toolchain%-usan}"
2993         add_cflags  -fsanitize=undefined
2994         add_ldflags -fsanitize=undefined
2995         case "$toolchain" in
2996             clang-usan)
2997                 add_cflags -O1
2998                 ;;
2999         esac
3000     ;;
3001     valgrind-*)
3002         target_exec_default="valgrind"
3003         case "$toolchain" in
3004             valgrind-massif)
3005                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
3006                 ;;
3007             valgrind-memcheck)
3008                 target_exec_args="--track-origins=yes --leak-check=full"
3009                 ;;
3010         esac
3011     ;;
3012     msvc)
3013         # Check whether the current MSVC version needs the C99 converter.
3014         # From MSVC 2013 (compiler major version 18) onwards, it does actually
3015         # support enough of C99 to build libav. Default to the new
3016         # behaviour if the regexp was unable to match anything, since this
3017         # successfully parses the version number of existing supported
3018         # versions that require the converter (MSVC 2010 and 2012).
3019         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
3020         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
3021             cc_default="cl"
3022         else
3023             cc_default="c99wrap cl"
3024         fi
3025         ld_default="$source_path/compat/windows/mslink"
3026         nm_default="dumpbin -symbols"
3027         ar_default="lib"
3028         case "$arch" in
3029         aarch64|arm64)
3030             as_default="armasm64"
3031             ;;
3032         arm*)
3033             as_default="armasm"
3034             ;;
3035         esac
3036         target_os_default="win32"
3037         # Use a relative path for TMPDIR. This makes sure all the
3038         # ffconf temp files are written with a relative path, avoiding
3039         # issues with msys/win32 path conversion for MSVC parameters
3040         # such as -Fo<file> or -out:<file>.
3041         TMPDIR=.
3042     ;;
3043     icl)
3044         cc_default="icl"
3045         ld_default="xilink"
3046         nm_default="dumpbin -symbols"
3047         ar_default="xilib"
3048         target_os_default="win32"
3049         TMPDIR=.
3050     ;;
3051     gcov)
3052         add_cflags  -fprofile-arcs -ftest-coverage
3053         add_ldflags -fprofile-arcs -ftest-coverage
3054     ;;
3055     llvm-cov)
3056         add_cflags -fprofile-arcs -ftest-coverage
3057         add_ldflags --coverage
3058     ;;
3059     hardened)
3060         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
3061         add_cflags   -fno-strict-overflow -fstack-protector-all
3062         add_ldflags  -Wl,-z,relro -Wl,-z,now
3063     ;;
3064     ?*)
3065         die "Unknown toolchain $toolchain"
3066     ;;
3067 esac
3068
3069 if test -n "$cross_prefix"; then
3070     test -n "$arch" && test -n "$target_os" ||
3071         die "Must specify target arch (--arch) and OS (--target-os) when cross-compiling"
3072     enable cross_compile
3073 fi
3074
3075 ar_default="${cross_prefix}${ar_default}"
3076 cc_default="${cross_prefix}${cc_default}"
3077 objcc_default="${cross_prefix}${objcc_default}"
3078 x86asmexe_default="${cross_prefix}${x86asmexe_default}"
3079 nm_default="${cross_prefix}${nm_default}"
3080 pkg_config_default="${cross_prefix}${pkg_config_default}"
3081 ranlib="${cross_prefix}${ranlib}"
3082 strip="${cross_prefix}${strip}"
3083
3084 sysinclude_default="${sysroot}/usr/include"
3085
3086 set_default arch cc pkg_config sysinclude target_exec target_os x86asmexe
3087 enabled cross_compile || host_cc_default=$cc
3088 set_default host_cc
3089
3090 if ! $pkg_config --version >/dev/null 2>&1; then
3091     warn "$pkg_config not found, library detection may fail."
3092     pkg_config=false
3093 fi
3094
3095 exesuf() {
3096     case $1 in
3097         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
3098     esac
3099 }
3100
3101 EXESUF=$(exesuf $target_os)
3102 HOSTEXESUF=$(exesuf $host_os)
3103
3104 # set temporary file name
3105 : ${TMPDIR:=$TEMPDIR}
3106 : ${TMPDIR:=$TMP}
3107 : ${TMPDIR:=/tmp}
3108
3109 if ! test_cmd mktemp -u XXXXXX; then
3110     # simple replacement for missing mktemp
3111     # NOT SAFE FOR GENERAL USE
3112     mktemp(){
3113         tmpname="${2%%XXX*}.${HOSTNAME}.${UID}.$$"
3114         echo "$tmpname"
3115         mkdir "$tmpname"
3116     }
3117 fi
3118
3119 AVTMPDIR=$(mktemp -d "${TMPDIR}/avconf.XXXXXXXX" 2> /dev/null) ||
3120     die "Unable to create temporary directory in $TMPDIR."
3121
3122 tmpfile(){
3123     tmp="${AVTMPDIR}/test"$2
3124     (set -C; exec > $tmp) 2> /dev/null ||
3125         die "Unable to create temporary file in $AVTMPDIR."
3126     eval $1=$tmp
3127 }
3128
3129 trap 'rm -rf -- "$AVTMPDIR"' EXIT
3130 trap 'exit 2' INT
3131
3132 tmpfile TMPASM .asm
3133 tmpfile TMPC   .c
3134 tmpfile TMPE   $EXESUF
3135 tmpfile TMPH   .h
3136 tmpfile TMPO   .o
3137 tmpfile TMPS   .S
3138 tmpfile TMPSH  .sh
3139 tmpfile TMPV   .ver
3140
3141 unset -f mktemp
3142
3143 chmod +x $TMPE
3144
3145 # make sure we can execute files in $TMPDIR
3146 cat > $TMPSH 2>> $logfile <<EOF
3147 #! /bin/sh
3148 EOF
3149 chmod +x $TMPSH >> $logfile 2>&1
3150 if ! $TMPSH >> $logfile 2>&1; then
3151     cat <<EOF
3152 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
3153 variable to another directory and make sure that it is not mounted noexec.
3154 EOF
3155     die "Sanity test failed."
3156 fi
3157
3158 armasm_flags(){
3159     for flag; do
3160         case $flag in
3161             # Filter out MSVC cl.exe options from cflags that shouldn't
3162             # be passed to gas-preprocessor
3163             -M[TD]*)                                            ;;
3164             *)                  echo $flag                      ;;
3165         esac
3166    done
3167 }
3168
3169 cparser_flags(){
3170     for flag; do
3171         case $flag in
3172             -Wno-switch)             echo -Wno-switch-enum ;;
3173             -Wno-format-zero-length) ;;
3174             -Wdisabled-optimization) ;;
3175             -Wno-pointer-sign)       echo -Wno-other ;;
3176             *)                       echo $flag ;;
3177         esac
3178     done
3179 }
3180
3181 msvc_common_flags(){
3182     for flag; do
3183         case $flag in
3184             # In addition to specifying certain flags under the compiler
3185             # specific filters, they must be specified here as well or else the
3186             # generic catch all at the bottom will print the original flag.
3187             -Wall)                ;;
3188             -Wextra)              ;;
3189             -std=c99)             ;;
3190             # Common flags
3191             -fomit-frame-pointer) ;;
3192             -g)                   echo -Z7 ;;
3193             -fno-math-errno)      ;;
3194             -fno-common)          ;;
3195             -fno-signed-zeros)    ;;
3196             -fPIC)                ;;
3197             -mthumb)              ;;
3198             -march=*)             ;;
3199             -lz)                  echo zlib.lib ;;
3200             -lx264)               echo libx264.lib ;;
3201             -l*)                  echo ${flag#-l}.lib ;;
3202             -L*)                  echo -libpath:${flag#-L} ;;
3203             *)                    echo $flag ;;
3204         esac
3205     done
3206 }
3207
3208 msvc_flags(){
3209     msvc_common_flags "$@"
3210     for flag; do
3211         case $flag in
3212             -Wall)                echo -W3 -wd4018 -wd4146 -wd4244 -wd4305     \
3213                                        -wd4554 ;;
3214             -Wextra)              echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3215                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3216                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3217                                        -wd4273 -wd4554 -wd4701 -wd4703 ;;
3218         esac
3219     done
3220 }
3221
3222 icl_flags(){
3223     msvc_common_flags "$@"
3224     for flag; do
3225         case $flag in
3226             # Despite what Intel's documentation says -Wall, which is supported
3227             # on Windows, does enable remarks so disable them here.
3228             -Wall)                echo $flag -Qdiag-disable:remark ;;
3229             -std=c99)             echo -Qstd=c99 ;;
3230         esac
3231     done
3232 }
3233
3234 suncc_flags(){
3235     for flag; do
3236         case $flag in
3237             -march=*|-mcpu=*)
3238                 case "${flag#*=}" in
3239                     native)                   echo -xtarget=native       ;;
3240                     v9|niagara)               echo -xarch=sparc          ;;
3241                     ultrasparc)               echo -xarch=sparcvis       ;;
3242                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3243                     i586|pentium)             echo -xchip=pentium        ;;
3244                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3245                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3246                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3247                     pentium4*)          echo -xtarget=pentium4           ;;
3248                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3249                     *-sse3)             echo -xarch=sse3                 ;;
3250                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3251                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3252                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3253                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3254                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3255                     k8|opteron|athlon64|athlon-fx)
3256                                                echo -xarch=sse2a         ;;
3257                     athlon*)                   echo -xarch=pentium_proa  ;;
3258                 esac
3259                 ;;
3260             -std=c99)             echo -xc99              ;;
3261             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3262             -fPIC)                echo -KPIC -xcode=pic32 ;;
3263             -W*,*)                echo $flag              ;;
3264             -f*-*|-W*|-mimpure-text)                      ;;
3265             -shared)              echo -G                 ;;
3266             *)                    echo $flag              ;;
3267         esac
3268     done
3269 }
3270
3271 probe_cc(){
3272     pfx=$1
3273     _cc=$2
3274
3275     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3276     unset _ld_o _ldflags _ld_lib _ld_path
3277     unset _depflags _DEPCMD _DEPFLAGS
3278     _flags_filter=echo
3279
3280     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3281         _type=llvm_gcc
3282         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3283         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3284         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3285         _cflags_speed='-O3'
3286         _cflags_size='-Os'
3287     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3288         _type=gcc
3289         gcc_version=$($_cc --version | head -n1)
3290         gcc_basever=$($_cc -dumpversion)
3291         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3292         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3293         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3294         if ! $_cc -dumpversion | grep -q '^2\.'; then
3295             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3296         fi
3297         _cflags_speed='-O3'
3298         _cflags_size='-Os'
3299     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3300         _type=icc
3301         _ident=$($_cc --version | head -n1)
3302         _depflags='-MMD'
3303         _cflags_speed='-O3'
3304         _cflags_size='-Os'
3305         _cflags_noopt='-O1'
3306     elif $_cc -v 2>&1 | grep -q xlc; then
3307         _type=xlc
3308         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3309         _cflags_speed='-O5'
3310         _cflags_size='-O5 -qcompact'
3311     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3312         test -d "$sysroot" || die "No valid sysroot specified."
3313         _type=armcc
3314         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3315         armcc_conf="$PWD/armcc.conf"
3316         $_cc --arm_linux_configure                 \
3317              --arm_linux_config_file="$armcc_conf" \
3318              --configure_sysroot="$sysroot"        \
3319              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3320              die "Error creating armcc configuration file."
3321         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3322         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3323         as_default="${cross_prefix}gcc"
3324         _depflags='-MMD'
3325         _cflags_speed='-O3'
3326         _cflags_size='-Os'
3327     elif $_cc -v 2>&1 | grep -q clang; then
3328         _type=clang
3329         _ident=$($_cc --version 2>/dev/null | head -n1)
3330         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3331         _cflags_speed='-O3'
3332         _cflags_size='-Os'
3333     elif $_cc -V 2>&1 | grep -q Sun; then
3334         _type=suncc
3335         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3336         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3337         _DEPFLAGS='-xM1 -xc99'
3338         _ldflags='-std=c99'
3339         _cflags_speed='-O5'
3340         _cflags_size='-O5 -xspace'
3341         _flags_filter=suncc_flags
3342     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3343         _type=pathscale
3344         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3345         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3346         _cflags_speed='-O2'
3347         _cflags_size='-Os'
3348         _flags_filter='filter_out -Wdisabled-optimization'
3349     elif $_cc -v 2>&1 | grep -q Open64; then
3350         _type=open64
3351         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3352         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3353         _cflags_speed='-O2'
3354         _cflags_size='-Os'
3355         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3356     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3357         _type=armasm
3358         _ident=$($_cc | head -n1)
3359         # 4509: "This form of conditional instruction is deprecated"
3360         _flags="-nologo -ignore 4509"
3361         _flags_filter=armasm_flags
3362     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3363         _type=msvc
3364         _ident=$($_cc 2>&1 | head -n1)
3365         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3366         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3367         _cflags_speed="-O2"
3368         _cflags_size="-O1"
3369         _cflags_noopt="-O1"
3370         if $_cc -nologo- 2>&1 | grep -q Linker; then
3371             _ld_o='-out:$@'
3372         else
3373             _ld_o='-Fe$@'
3374         fi
3375         _cc_o='-Fo$@'
3376         _cc_e='-P -Fi$@'
3377         _flags_filter=msvc_flags
3378         _ld_lib='lib%.a'
3379         _ld_path='-libpath:'
3380         _flags='-nologo'
3381     elif $_cc 2>&1 | grep -q Intel; then
3382         _type=icl
3383         _ident=$($_cc 2>&1 | head -n1)
3384         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3385         # Not only is O3 broken on 13.x+ but it is slower on all previous
3386         # versions (tested) as well.
3387         _cflags_speed="-O2"
3388         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3389         if $_cc 2>&1 | grep -q Linker; then
3390             _ld_o='-out:$@'
3391         else
3392             _ld_o='-Fe$@'
3393         fi
3394         _cc_o='-Fo$@'
3395         _cc_e='-P'
3396         _flags_filter=icl_flags
3397         _ld_lib='lib%.a'
3398         _ld_path='-libpath:'
3399         # -Qdiag-error to make icl error when seeing certain unknown arguments
3400         _flags='-nologo -Qdiag-error:4044,10157'
3401         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3402         # with MSVC which enables it by default.
3403         _cflags='-Qms0 -Qvec- -Qsimd- -GS'
3404     elif $_cc -? 2>/dev/null | grep -q 'LLVM.*Linker'; then
3405         # lld can emulate multiple different linkers; in ms link.exe mode,
3406         # the -? parameter gives the help output which contains an identifyable
3407         # string, while it gives an error in other modes.
3408         _type=lld-link
3409         # The link.exe mode doesn't have a switch for getting the version,
3410         # but we can force it back to gnu mode and get the version from there.
3411         _ident=$($_cc -flavor gnu --version 2>/dev/null)
3412         _ld_o='-out:$@'
3413         _flags_filter=msvc_flags
3414         _ld_lib='lib%.a'
3415         _ld_path='-libpath:'
3416     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3417         _type=cparser
3418         _ident=$($_cc --version | head -n1)
3419         _depflags='-MMD'
3420         _cflags_speed='-O4'
3421         _cflags_size='-O2'
3422         _flags_filter=cparser_flags
3423     fi
3424
3425     eval ${pfx}_type=\$_type
3426     eval ${pfx}_ident=\$_ident
3427 }
3428
3429 set_ccvars(){
3430     eval ${1}_C=\${_cc_c-\${${1}_C}}
3431     eval ${1}_E=\${_cc_e-\${${1}_E}}
3432     eval ${1}_O=\${_cc_o-\${${1}_O}}
3433
3434     if [ -n "$_depflags" ]; then
3435         eval ${1}_DEPFLAGS=\$_depflags
3436     else
3437         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3438         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3439         eval DEP${1}FLAGS=\$_flags
3440     fi
3441 }
3442
3443 probe_cc cc "$cc"
3444 cflags_filter=$_flags_filter
3445 cflags_speed=$_cflags_speed
3446 cflags_size=$_cflags_size
3447 cflags_noopt=$_cflags_noopt
3448 add_cflags $_flags $_cflags
3449 cc_ldflags=$_ldflags
3450 set_ccvars CC
3451
3452 probe_cc hostcc "$host_cc"
3453 host_cflags_filter=$_flags_filter
3454 host_cflags_speed=$_cflags_speed
3455 add_host_cflags  $_flags $_cflags
3456 set_ccvars HOSTCC
3457
3458 test -n "$cc_type" && enable $cc_type ||
3459     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3460
3461 : ${as_default:=$cc}
3462 : ${objcc_default:=$cc}
3463 : ${dep_cc_default:=$cc}
3464 : ${ld_default:=$cc}
3465 : ${host_ld_default:=$host_cc}
3466 set_default ar as objcc dep_cc ld host_ld
3467
3468 probe_cc as "$as"
3469 asflags_filter=$_flags_filter
3470 add_asflags $_flags $_cflags
3471 set_ccvars AS
3472
3473 probe_cc objcc "$objcc"
3474 objcflags_filter=$_flags_filter
3475 add_objcflags $_flags $_cflags
3476 set_ccvars OBJC
3477
3478 probe_cc ld "$ld"
3479 ldflags_filter=$_flags_filter
3480 add_ldflags $_flags $_ldflags
3481 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3482 LD_O=${_ld_o-$LD_O}
3483 LD_LIB=${_ld_lib-$LD_LIB}
3484 LD_PATH=${_ld_path-$LD_PATH}
3485
3486 probe_cc hostld "$host_ld"
3487 host_ldflags_filter=$_flags_filter
3488 add_host_ldflags $_flags $_ldflags
3489 HOSTLD_O=${_ld_o-$HOSTLD_O}
3490
3491 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3492     probe_cc depcc "$dep_cc"
3493     CCDEP=${_DEPCMD:-$DEPCMD}
3494     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3495     DEPCCFLAGS=$_flags
3496 fi
3497
3498 if $ar 2>&1 | grep -q Microsoft; then
3499     arflags="-nologo"
3500     ar_o='-out:$@'
3501 else
3502     arflags="rc"
3503     ar_o='$@'
3504 fi
3505
3506 add_cflags $extra_cflags
3507 add_objcflags $extra_objcflags
3508 add_asflags $extra_cflags
3509
3510 if test -n "$sysroot"; then
3511     case "$cc_type" in
3512         gcc|llvm_gcc|clang)
3513             add_cppflags --sysroot="$sysroot"
3514             add_ldflags --sysroot="$sysroot"
3515         ;;
3516     esac
3517 fi
3518
3519 if test "$cpu" = host; then
3520     enabled cross_compile &&
3521         die "--cpu=host makes no sense when cross-compiling."
3522
3523     case "$cc_type" in
3524         gcc|llvm_gcc)
3525             check_native(){
3526                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3527                 sed -n "/cc1.*$1=/{
3528                             s/.*$1=\\([^ ]*\\).*/\\1/
3529                             p
3530                             q
3531                         }" $TMPE
3532             }
3533             cpu=$(check_native -march || check_native -mcpu)
3534         ;;
3535     esac
3536
3537     test "${cpu:-host}" = host &&
3538         die "--cpu=host not supported with compiler $cc"
3539 fi
3540
3541 # Deal with common $arch aliases
3542 case "$arch" in
3543     aarch64|arm64)
3544         arch="aarch64"
3545     ;;
3546     arm*)
3547         arch="arm"
3548     ;;
3549     mips*|IP*)
3550         case "$arch" in
3551         *el)
3552             add_cppflags -EL
3553             add_ldflags -EL
3554         ;;
3555         *eb)
3556             add_cppflags -EB
3557             add_ldflags -EB
3558         ;;
3559         esac
3560         arch="mips"
3561     ;;
3562     parisc*|hppa*)
3563         arch="parisc"
3564     ;;
3565     "Power Macintosh"|ppc*|powerpc*)
3566         arch="ppc"
3567     ;;
3568     s390|s390x)
3569         arch="s390"
3570     ;;
3571     sh4|sh)
3572         arch="sh4"
3573     ;;
3574     sun4u|sparc*)
3575         arch="sparc"
3576     ;;
3577     tilegx|tile-gx)
3578         arch="tilegx"
3579     ;;
3580     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3581         arch="x86"
3582     ;;
3583 esac
3584
3585 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3586 enable $arch
3587
3588 # Add processor-specific flags
3589 if enabled aarch64; then
3590
3591     case $cpu in
3592         armv*)
3593             cpuflags="-march=$cpu"
3594         ;;
3595         *)
3596             cpuflags="-mcpu=$cpu"
3597         ;;
3598     esac
3599
3600 elif enabled alpha; then
3601
3602     cpuflags="-mcpu=$cpu"
3603
3604 elif enabled arm; then
3605
3606     check_arm_arch() {
3607         test_cpp_condition stddef.h \
3608             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3609             $cpuflags
3610     }
3611
3612     probe_arm_arch() {
3613         if   check_arm_arch 4;        then echo armv4
3614         elif check_arm_arch 4T;       then echo armv4t
3615         elif check_arm_arch 5;        then echo armv5
3616         elif check_arm_arch 5E;       then echo armv5e
3617         elif check_arm_arch 5T;       then echo armv5t
3618         elif check_arm_arch 5TE;      then echo armv5te
3619         elif check_arm_arch 5TEJ;     then echo armv5te
3620         elif check_arm_arch 6;        then echo armv6
3621         elif check_arm_arch 6J;       then echo armv6j
3622         elif check_arm_arch 6K;       then echo armv6k
3623         elif check_arm_arch 6Z;       then echo armv6z
3624         elif check_arm_arch 6ZK;      then echo armv6zk
3625         elif check_arm_arch 6T2;      then echo armv6t2
3626         elif check_arm_arch 7;        then echo armv7
3627         elif check_arm_arch 7A  7_A;  then echo armv7-a
3628         elif check_arm_arch 7S;       then echo armv7-a
3629         elif check_arm_arch 7R  7_R;  then echo armv7-r
3630         elif check_arm_arch 7M  7_M;  then echo armv7-m
3631         elif check_arm_arch 7EM 7E_M; then echo armv7-m
3632         elif check_arm_arch 8A  8_A;  then echo armv8-a
3633         fi
3634     }
3635
3636     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3637
3638     case $cpu in
3639         armv*)
3640             cpuflags="-march=$cpu"
3641             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3642         ;;
3643         *)
3644             cpuflags="-mcpu=$cpu"
3645             case $cpu in
3646                 cortex-a*)                               subarch=armv7a  ;;
3647                 cortex-r*)                               subarch=armv7r  ;;
3648                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3649                 arm11*)                                  subarch=armv6   ;;
3650                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3651                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3652                 *)                             subarch=$(probe_arm_arch) ;;
3653             esac
3654         ;;
3655     esac
3656
3657     case "$subarch" in
3658         armv5t*)    enable fast_clz                ;;
3659         armv[6-8]*) enable fast_clz fast_unaligned ;;
3660     esac
3661
3662 elif enabled avr32; then
3663
3664     case $cpu in
3665         ap7[02]0[0-2])
3666             subarch="avr32_ap"
3667             cpuflags="-mpart=$cpu"
3668         ;;
3669         ap)
3670             subarch="avr32_ap"
3671             cpuflags="-march=$cpu"
3672         ;;
3673         uc3[ab]*)
3674             subarch="avr32_uc"
3675             cpuflags="-mcpu=$cpu"
3676         ;;
3677         uc)
3678             subarch="avr32_uc"
3679             cpuflags="-march=$cpu"
3680         ;;
3681     esac
3682
3683 elif enabled bfin; then
3684
3685     cpuflags="-mcpu=$cpu"
3686
3687 elif enabled mips; then
3688
3689     cpuflags="-march=$cpu"
3690
3691 elif enabled ppc; then
3692
3693     disable ldbrx
3694
3695     case $(tolower $cpu) in
3696         601|ppc601|powerpc601)
3697             cpuflags="-mcpu=601"
3698             disable altivec
3699         ;;
3700         603*|ppc603*|powerpc603*)
3701             cpuflags="-mcpu=603"
3702             disable altivec
3703         ;;
3704         604*|ppc604*|powerpc604*)
3705             cpuflags="-mcpu=604"
3706             disable altivec
3707         ;;
3708         g3|75*|ppc75*|powerpc75*)
3709             cpuflags="-mcpu=750"
3710             disable altivec
3711         ;;
3712         g4|745*|ppc745*|powerpc745*)
3713             cpuflags="-mcpu=7450"
3714             disable vsx
3715         ;;
3716         74*|ppc74*|powerpc74*)
3717             cpuflags="-mcpu=7400"
3718             disable vsx
3719         ;;
3720         g5|970|ppc970|powerpc970)
3721             cpuflags="-mcpu=970"
3722             disable vsx
3723         ;;
3724         power[3-6]*)
3725             cpuflags="-mcpu=$cpu"
3726             disable vsx
3727         ;;
3728         power[7-8]*)
3729             cpuflags="-mcpu=$cpu"
3730             enable ldbrx
3731         ;;
3732         cell)
3733             cpuflags="-mcpu=cell"
3734             enable ldbrx
3735             disable vsx
3736         ;;
3737         e500mc)
3738             cpuflags="-mcpu=e500mc"
3739             disable altivec
3740         ;;
3741         e500v2)
3742             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3743             disable altivec
3744             disable dcbzl
3745         ;;
3746         e500)
3747             cpuflags="-mcpu=8540 -mhard-float"
3748             disable altivec
3749             disable dcbzl
3750         ;;
3751     esac
3752
3753 elif enabled sparc; then
3754
3755     case $cpu in
3756         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3757             cpuflags="-mcpu=$cpu"
3758         ;;
3759         ultrasparc*|niagara[234])
3760             cpuflags="-mcpu=$cpu"
3761         ;;
3762     esac
3763
3764 elif enabled x86; then
3765
3766     case $cpu in
3767         i[345]86|pentium)
3768             cpuflags="-march=$cpu"
3769             disable i686
3770             disable mmx
3771         ;;
3772         # targets that do NOT support nopl and conditional mov (cmov)
3773         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3774             cpuflags="-march=$cpu"
3775             disable i686
3776         ;;
3777         # targets that do support nopl and conditional mov (cmov)
3778         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3779             cpuflags="-march=$cpu"
3780             enable i686
3781             enable fast_cmov
3782         ;;
3783         # targets that do support conditional mov but on which it's slow
3784         pentium4|pentium4m|prescott|nocona)
3785             cpuflags="-march=$cpu"
3786             enable i686
3787             disable fast_cmov
3788         ;;
3789     esac
3790
3791 fi
3792
3793 if [ "$cpu" != generic ]; then
3794     add_cflags  $cpuflags
3795     add_asflags $cpuflags
3796     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3797 fi
3798
3799 # compiler sanity check
3800 test_exec <<EOF
3801 int main(void){ return 0; }
3802 EOF
3803 if test "$?" != 0; then
3804     echo "$cc is unable to create an executable file."
3805     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3806         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3807         echo "Only do this if you know what cross compiling means."
3808     fi
3809     die "C compiler test failed."
3810 fi
3811
3812 add_cppflags -D_ISOC99_SOURCE
3813
3814 # some compilers silently accept -std=c11, so we also need to check that the
3815 # version macro is defined properly
3816 test_cpp_condition stdlib.h  "__STDC_VERSION__ >= 201112L" -std=c11 &&
3817     add_cflags -std=c11 ||
3818     check_cflags -std=c99
3819
3820 check_cppflags -D_FILE_OFFSET_BITS=64
3821 check_cppflags -D_LARGEFILE_SOURCE
3822
3823 add_host_cppflags -D_ISOC99_SOURCE
3824 check_host_cflags -std=c99
3825 check_host_cflags -Wall
3826 check_host_cflags $host_cflags_speed
3827
3828 check_64bit(){
3829     arch32=$1
3830     arch64=$2
3831     expr=${3:-'sizeof(void *) > 4'}
3832     test_code cc "" "int test[2*($expr) - 1]" &&
3833         subarch=$arch64 || subarch=$arch32
3834     enable $subarch
3835 }
3836
3837 case "$arch" in
3838     aarch64|alpha|ia64)
3839         enabled shared && enable_weak pic
3840     ;;
3841     mips)
3842         check_64bit mips mips64 '_MIPS_SIM > 1'
3843         enabled shared && enable_weak pic
3844     ;;
3845     parisc)
3846         check_64bit parisc parisc64
3847         enabled shared && enable_weak pic
3848     ;;
3849     ppc)
3850         check_64bit ppc ppc64
3851         enabled shared && enable_weak pic
3852     ;;
3853     s390)
3854         check_64bit s390 s390x
3855         enabled shared && enable_weak pic
3856     ;;
3857     sparc)
3858         check_64bit sparc sparc64
3859         enabled shared && enable_weak pic
3860     ;;
3861     x86)
3862         check_64bit x86_32 x86_64
3863         if enabled x86_64; then
3864             enabled shared && enable_weak pic
3865             objformat=elf64
3866         fi
3867     ;;
3868 esac
3869
3870 # OS specific
3871 case $target_os in
3872     aix)
3873         SHFLAGS=-shared
3874         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3875         enabled shared && add_ldflags -Wl,-brtl
3876         arflags='-Xany -r -c'
3877         ;;
3878     android)
3879         disable symver
3880         enable section_data_rel_ro
3881         SLIB_INSTALL_NAME='$(SLIBNAME)'
3882         SLIB_INSTALL_LINKS=
3883         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3884         ;;
3885     haiku)
3886         prefix_default="/boot/common"
3887         network_extralibs="-lnetwork"
3888         host_extralibs=
3889         ;;
3890     sunos)
3891         SHFLAGS='-shared -Wl,-h,$$(@F)'
3892         enabled x86 && append SHFLAGS -mimpure-text
3893         network_extralibs="-lsocket -lnsl"
3894         # When using suncc to build, the Solaris linker will mark
3895         # an executable with each instruction set encountered by
3896         # the Solaris assembler.  As our libraries contain their own
3897         # guards for processor-specific code, instead suppress
3898         # generation of the HWCAPS ELF section on Solaris x86 only.
3899         enabled_all suncc x86 &&
3900             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3901             add_ldflags -Wl,-M,mapfile
3902         nm_default='nm -P -g'
3903         version_script='-M'
3904         VERSION_SCRIPT_POSTPROCESS_CMD='perl $(SRC_PATH)/compat/solaris/make_sunver.pl - $(OBJS)'
3905         ;;
3906     netbsd)
3907         disable symver
3908         oss_indev_extralibs="-lossaudio"
3909         ;;
3910     openbsd|bitrig)
3911         disable symver
3912         SHFLAGS='-shared'
3913         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3914         SLIB_INSTALL_LINKS=
3915         oss_indev_extralibs="-lossaudio"
3916         ;;
3917     dragonfly)
3918         disable symver
3919         ;;
3920     freebsd)
3921         ;;
3922     bsd/os)
3923         add_extralibs -lpoll -lgnugetopt
3924         ;;
3925     darwin)
3926         enabled ppc && add_asflags -force_cpusubtype_ALL
3927         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3928         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3929         add_ldflags -Wl,-dynamic,-search_paths_first
3930         check_cflags -Werror=partial-availability
3931         SLIBSUF=".dylib"
3932         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME).$(LIBVERSION)$(SLIBSUF)'
3933         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME).$(LIBMAJOR)$(SLIBSUF)'
3934         enabled x86_64 && objformat="macho64" || objformat="macho32"
3935         enabled_any pic shared ||
3936             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3937         check_header dispatch/dispatch.h &&
3938             add_cppflags '-I\$(SRC_PATH)/compat/dispatch_semaphore'
3939         if test -n "$sysroot"; then
3940             is_in -isysroot $cc $CPPFLAGS $CFLAGS || check_cppflags -isysroot $sysroot
3941             is_in -isysroot $ld $LDFLAGS          || check_ldflags  -isysroot $sysroot
3942         fi
3943         ;;
3944     msys*)
3945         die "Native MSYS builds are discouraged, please use the MINGW environment."
3946         ;;
3947     mingw32*|mingw64*)
3948         target_os=mingw32
3949         LIBTARGET=i386
3950         if enabled x86_64; then
3951             LIBTARGET="i386:x86-64"
3952         elif enabled arm; then
3953             LIBTARGET="arm"
3954         elif enabled aarch64; then
3955             LIBTARGET="arm64"
3956         fi
3957         if enabled shared; then
3958             # Cannot build both shared and static libs when using dllimport.
3959             disable static
3960         fi
3961         check_ldflags -Wl,--nxcompat
3962         check_ldflags -Wl,--dynamicbase
3963         shlibdir_default="$bindir_default"
3964         SLIBPREF=""
3965         SLIBSUF=".dll"
3966         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3967         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3968         SLIB_EXTRA_CMD=-'$(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3969         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3970         SLIB_INSTALL_LINKS=
3971         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3972         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3973         SLIB_CREATE_DEF_CMD='EXTERN_PREFIX="$(EXTERN_PREFIX)" AR="$(AR_CMD)" NM="$(NM_CMD)" $(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3974         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-auto-image-base $$(@:$(SLIBSUF)=.def)'
3975         enabled x86_64 && objformat="win64" || objformat="win32"
3976         dlltool="${cross_prefix}dlltool"
3977         ranlib=:
3978         enable dos_paths
3979         ;;
3980     win32|win64)
3981         disable symver
3982         if enabled shared; then
3983             # Link to the import library instead of the normal static library
3984             # for shared libs.
3985             LD_LIB='%.lib'
3986             # Cannot build both shared and static libs with MSVC or icl.
3987             disable static
3988         fi
3989         shlibdir_default="$bindir_default"
3990         SLIBPREF=""
3991         SLIBSUF=".dll"
3992         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3993         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3994         SLIB_CREATE_DEF_CMD='EXTERN_PREFIX="$(EXTERN_PREFIX)" $(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3995         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3996         SLIB_INSTALL_LINKS=
3997         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3998         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3999         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
4000         enabled x86_64 && objformat="win64" || objformat="win32"
4001         ranlib=:
4002         enable dos_paths
4003         ;;
4004     cygwin*)
4005         target_os=cygwin
4006         shlibdir_default="$bindir_default"
4007         SLIBPREF="cyg"
4008         SLIBSUF=".dll"
4009         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
4010         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
4011         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4012         SLIB_INSTALL_LINKS=
4013         SLIB_INSTALL_EXTRA_LIB='lib$(NAME).dll.a'
4014         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(NAME).dll.a'
4015         enabled x86_64 && objformat="win64" || objformat="win32"
4016         enable dos_paths
4017         ;;
4018     *-dos|freedos|opendos)
4019         network_extralibs="-lsocket"
4020         objformat="coff"
4021         enable dos_paths
4022         add_cppflags -U__STRICT_ANSI__
4023         ;;
4024     linux)
4025         enable section_data_rel_ro
4026         ;;
4027     irix*)
4028         target_os=irix
4029         ranlib="echo ignoring ranlib"
4030         ;;
4031     os/2*)
4032         ln_s="cp -f"
4033         objformat="aout"
4034         add_cppflags -D_GNU_SOURCE
4035         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zhigh-mem -Zmap
4036         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
4037         LIBSUF="_s.a"
4038         SLIBPREF=""
4039         SLIBSUF=".dll"
4040         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
4041         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
4042         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
4043             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
4044             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
4045             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
4046             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
4047         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
4048             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
4049         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
4050         enable dos_paths
4051         ;;
4052     gnu/kfreebsd)
4053         add_cppflags -D_BSD_SOURCE
4054         ;;
4055     gnu)
4056         ;;
4057     qnx)
4058         add_cppflags -D_QNX_SOURCE
4059         network_extralibs="-lsocket"
4060         ;;
4061     symbian)
4062         SLIBSUF=".dll"
4063         enable dos_paths
4064         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
4065         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
4066         add_ldflags -Wl,--target1-abs,--no-undefined \
4067                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
4068                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
4069         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
4070                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
4071                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
4072         ;;
4073     minix)
4074         ;;
4075     none)
4076         ;;
4077     *)
4078         die "Unknown OS '$target_os'."
4079         ;;
4080 esac
4081
4082 # determine libc flavour
4083
4084 probe_libc(){
4085     pfx=$1
4086     pfx_no_=${pfx%_}
4087     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
4088     if test_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
4089         eval ${pfx}libc_type=uclibc
4090         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4091     elif test_${pfx}cpp_condition features.h "defined __GLIBC__"; then
4092         eval ${pfx}libc_type=glibc
4093         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4094     # MinGW headers can be installed on Cygwin, so check for newlib first.
4095     elif test_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
4096         eval ${pfx}libc_type=newlib
4097         add_${pfx}cppflags -U__STRICT_ANSI__ -D_XOPEN_SOURCE=600
4098     # MinGW64 is backwards compatible with MinGW32, so check for it first.
4099     elif test_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
4100         eval ${pfx}libc_type=mingw64
4101         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4102         eval test \$${pfx_no_}cc_type = "gcc" &&
4103             add_${pfx}cppflags -D__printf__=__gnu_printf__
4104     elif test_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
4105          test_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
4106         eval ${pfx}libc_type=mingw32
4107         test_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
4108             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
4109             die "ERROR: MinGW32 runtime version must be >= 3.15."
4110         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4111         test_${pfx}cpp_condition _mingw.h "__MSVCRT_VERSION__ < 0x0700" &&
4112             add_${pfx}cppflags -D__MSVCRT_VERSION__=0x0700
4113         test_${pfx}cpp_condition windows.h "defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0502" &&
4114             add_${pfx}cppflags -D_WIN32_WINNT=0x0502
4115         eval test \$${pfx_no_}cc_type = "gcc" &&
4116             add_${pfx}cppflags -D__printf__=__gnu_printf__
4117     elif test_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
4118         eval ${pfx}libc_type=msvcrt
4119         if test_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
4120             if [ "$pfx" = host_ ]; then
4121                 add_host_cppflags -Dsnprintf=_snprintf
4122             else
4123                 add_compat strtod.o strtod=avpriv_strtod
4124                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
4125                                              _snprintf=avpriv_snprintf  \
4126                                              vsnprintf=avpriv_vsnprintf
4127             fi
4128         fi
4129         add_${pfx}cppflags -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS
4130         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
4131         # 0x601 by default unless something else is set by the user.
4132         # This can easily lead to us detecting functions only present
4133         # in such new versions and producing binaries requiring windows 7.0.
4134         # Therefore explicitly set the default to XP unless the user has
4135         # set something else on the command line.
4136         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
4137         # family. For these cases, configure is free to use any functions
4138         # found in the SDK headers by default. (Alternatively, we could force
4139         # _WIN32_WINNT to 0x0602 in that case.)
4140         test_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
4141             { test_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
4142 #ifdef WINAPI_FAMILY
4143 #include <winapifamily.h>
4144 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4145 #error not desktop
4146 #endif
4147 #endif
4148 EOF
4149         if [ "$pfx" = "" ]; then
4150             check_func strtoll || add_cflags -Dstrtoll=_strtoi64
4151         fi
4152     elif test_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4153         eval ${pfx}libc_type=klibc
4154     elif test_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4155         eval ${pfx}libc_type=bionic
4156     elif test_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4157         eval ${pfx}libc_type=solaris
4158         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4159     else
4160         eval ${pfx}libc_type=default
4161         add_${pfx}cppflags -D_DEFAULT_SOURCE
4162     fi
4163     eval test -n "\${${pfx}libc_type}" && enable ${pfx}libc_${libc_type}
4164 }
4165
4166 probe_libc
4167 probe_libc host_
4168
4169 # hacks for compiler/libc/os combinations
4170
4171 case $libc_type in
4172     bionic)
4173         add_compat strtod.o strtod=avpriv_strtod
4174         ;;
4175 esac
4176
4177 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4178     add_cppflags '-I\$(SRC_PATH)/compat/float'
4179
4180 test_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4181
4182 set_default $PATHS_LIST
4183 set_default nm
4184
4185 disabled optimizations || check_cflags -fomit-frame-pointer
4186
4187 enable_weak_pic() {
4188     disabled pic && return
4189     enable pic
4190     add_cppflags -DPIC
4191     case "$target_os" in
4192     mingw*|cygwin*|win*)
4193         ;;
4194     *)
4195         add_cflags -fPIC
4196         add_asflags -fPIC
4197         ;;
4198     esac
4199 }
4200
4201 enabled pic && enable_weak_pic
4202
4203 test_cc <<EOF || die "Symbol mangling check failed."
4204 int ff_extern;
4205 EOF
4206 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4207 extern_prefix=${sym%%ff_extern*}
4208
4209 ! disabled inline_asm && check_inline_asm inline_asm '"" ::'
4210
4211 for restrict_keyword in restrict __restrict__ __restrict ""; do
4212     test_code cc "" "char * $restrict_keyword p" && break
4213 done
4214
4215 check_cc pragma_deprecated "" '_Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"")'
4216
4217 # The global variable ensures the bits appear unchanged in the object file.
4218 test_cc <<EOF || die "endian test failed"
4219 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4220 EOF
4221 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4222
4223 check_gas() {
4224     log "check_gas using '$as' as AS"
4225     # :vararg is used on aarch64, arm and ppc altivec
4226     test_as <<EOF || return 1
4227 .macro m n, y:vararg=0
4228 \n: .int \y
4229 .endm
4230 m x
4231 EOF
4232     # .altmacro is only used in arm asm
4233     ! enabled arm || check_as gnu_as ".altmacro"
4234 }
4235
4236 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4237     nogas=:
4238     enabled_any arm aarch64 && nogas=die
4239     enabled_all ppc altivec && nogas=warn
4240     as_noop=-v
4241
4242     case $as_type in
4243         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4244         gcc)  gaspp_as_type=gas ;;
4245         *)    gaspp_as_type=$as_type ;;
4246     esac
4247
4248     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4249
4250     test_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4251         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4252
4253     if ! check_gas ; then
4254         as=${gas:=$as}
4255         check_gas || \
4256             $nogas "GNU assembler not found, install/update gas-preprocessor"
4257     fi
4258
4259     check_as as_func ".func test
4260                       .endfunc"
4261 fi
4262
4263 check_inline_asm inline_asm_labels '"1:\n"'
4264
4265 if enabled aarch64; then
4266     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4267     # internal assembler in clang 3.3 does not support this instruction
4268     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4269     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4270
4271     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4272
4273 elif enabled alpha; then
4274
4275     check_cflags -mieee
4276
4277 elif enabled arm; then
4278
4279     enabled msvc && check_cpp_condition thumb stddef.h "defined _M_ARMT"
4280     test_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4281     enabled thumb && check_cflags -mthumb || check_cflags -marm
4282
4283     if check_cpp_condition vfp_args stddef.h "defined __ARM_PCS_VFP"; then
4284         :
4285     elif check_cpp_condition vfp_args stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4286         :
4287     elif ! test_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4288         case "${cross_prefix:-$cc}" in
4289             *hardfloat*) enable vfp_args; fpabi=vfp ;;
4290             *) check_ld vfp_args <<EOF && fpabi=vfp || fpabi=soft ;;
4291 __asm__ (".eabi_attribute 28, 1");
4292 int main(void) { return 0; }
4293 EOF
4294         esac
4295         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4296     fi
4297
4298     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4299     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4300     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4301     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4302     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4303     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4304
4305     [ $target_os = linux ] || [ $target_os = android ] ||
4306         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4307             $ARCH_EXT_LIST_ARM
4308
4309     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4310
4311     check_as as_arch_directive ".arch armv7-a"
4312     check_as as_fpu_directive  ".fpu neon"
4313
4314     # llvm's integrated assembler supports .object_arch from llvm 3.5
4315     [ "$objformat" = elf32 ] || [ "$objformat" = elf64 ] &&
4316         check_as as_object_arch ".object_arch armv4"
4317
4318     # MS armasm fails to assemble our PIC constructs
4319     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4320
4321 elif enabled mips; then
4322
4323     # make sure that only one instruction set is enabled
4324     disable $ARCH_EXT_LIST_MIPS
4325
4326     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4327
4328     if enabled mips64; then
4329         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4330             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4331                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4332     else
4333         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4334             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4335                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4336     fi
4337
4338 elif enabled parisc; then
4339
4340     if enabled gcc; then
4341         case $($cc -dumpversion) in
4342             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4343         esac
4344     fi
4345
4346 elif enabled ppc; then
4347
4348     enable local_aligned_8 local_aligned_16 local_aligned_32
4349
4350     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4351     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4352     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4353     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4354
4355     if enabled altivec; then
4356         check_cflags -maltivec -mabi=altivec
4357
4358         # check if our compiler supports Motorola AltiVec C API
4359         check_cc altivec altivec.h "vector signed int v1 = (vector signed int) { 0 };
4360                                     vector signed int v2 = (vector signed int) { 1 };
4361                                     v1 = vec_add(v1, v2);"
4362
4363         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4364     fi
4365
4366     if enabled vsx; then
4367         check_cflags -mvsx &&
4368         check_cc vsx altivec.h "int v[4] = { 0 };
4369                                 vector signed int v1 = vec_vsx_ld(0, v);"
4370     fi
4371
4372     if enabled power8; then
4373         check_cpp_condition power8 altivec.h "defined(_ARCH_PWR8)"
4374     fi
4375
4376 elif enabled x86; then
4377
4378     check_builtin rdtsc    intrin.h   "__rdtsc()"
4379     check_builtin mm_empty mmintrin.h "_mm_empty()"
4380
4381     enable local_aligned_8 local_aligned_16 local_aligned_32
4382
4383     # check whether EBP is available on x86
4384     # As 'i' is stored on the stack, this program will crash
4385     # if the base pointer is used to access it because the
4386     # base pointer is cleared in the inline assembly code.
4387     check_exec_crash <<EOF && enable ebp_available
4388 volatile int i=0;
4389 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4390 return i;
4391 EOF
4392
4393     # check whether EBX is available on x86
4394     check_inline_asm ebx_available '""::"b"(0)' &&
4395         check_inline_asm ebx_available '"":::"%ebx"'
4396
4397     # check whether xmm clobbers are supported
4398     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4399
4400     # check whether binutils is new enough to compile SSSE3/MMXEXT
4401     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4402     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4403
4404     probe_x86asm(){
4405         x86asmexe_probe=$1
4406         if test_cmd $x86asmexe_probe -v; then
4407             x86asmexe=$x86asmexe_probe
4408             x86asm_type=nasm
4409             x86asm_debug="-g -F dwarf"
4410             X86ASMDEP=
4411             X86ASM_DEPFLAGS='-MD $(@:.o=.d)'
4412         elif test_cmd $x86asmexe_probe --version; then
4413             x86asmexe=$x86asmexe_probe
4414             x86asm_type=yasm
4415             x86asm_debug="-g dwarf2"
4416             X86ASMDEP='$(DEPX86ASM) $(X86ASMFLAGS) -M $(X86ASM_O) $< > $(@:.o=.d)'
4417             X86ASM_DEPFLAGS=
4418         fi
4419         test_x86asm "movbe ecx, [5]" && enable x86asm
4420     }
4421
4422     if ! disabled_any asm mmx x86asm; then
4423         disable x86asm
4424         for program in $x86asmexe nasm yasm; do
4425             probe_x86asm $program && break
4426         done
4427         disabled x86asm && die "nasm/yasm not found or too old. Use --disable-x86asm for a crippled build."
4428         X86ASMFLAGS="-f $objformat"
4429         enabled pic               && append X86ASMFLAGS "-DPIC"
4430         test -n "$extern_prefix"  && append X86ASMFLAGS "-DPREFIX"
4431         case "$objformat" in
4432             elf*) enabled debug && append X86ASMFLAGS $x86asm_debug ;;
4433         esac
4434
4435         test_x86asm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4436         test_x86asm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4437         test_x86asm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4438         test_x86asm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4439         test_x86asm "CPU amdnop"                      || disable cpunop
4440     fi
4441
4442     case "$cpu" in
4443         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4444             disable fast_clz
4445         ;;
4446     esac
4447
4448 fi
4449
4450 check_cc intrinsics_neon arm_neon.h "int16x8_t test = vdupq_n_s16(0)"
4451
4452 check_ldflags -Wl,--as-needed
4453
4454 if ! disabled network; then
4455     check_func getaddrinfo $network_extralibs
4456     check_func inet_aton $network_extralibs
4457
4458     check_type netdb.h "struct addrinfo"
4459     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4460     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4461     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4462     check_type poll.h "struct pollfd"
4463     check_type netinet/sctp.h "struct sctp_event_subscribe"
4464     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4465     check_type netinet/in.h "struct sockaddr_in6"
4466     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4467     check_type "sys/types.h sys/socket.h" socklen_t
4468
4469     # Prefer arpa/inet.h over winsock2
4470     if check_header arpa/inet.h ; then
4471         check_func closesocket
4472     elif check_header winsock2.h ; then
4473         check_func_headers winsock2.h closesocket -lws2 &&
4474             network_extralibs="-lws2" ||
4475         { check_func_headers winsock2.h closesocket -lws2_32 &&
4476             network_extralibs="-lws2_32"; } || disable winsock2_h network
4477         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4478
4479         check_type ws2tcpip.h socklen_t
4480         check_type ws2tcpip.h "struct addrinfo"
4481         check_type ws2tcpip.h "struct group_source_req"
4482         check_type ws2tcpip.h "struct ip_mreq_source"
4483         check_type ws2tcpip.h "struct ipv6_mreq"
4484         check_type winsock2.h "struct pollfd"
4485         check_struct winsock2.h "struct sockaddr" sa_len
4486         check_type ws2tcpip.h "struct sockaddr_in6"
4487         check_type ws2tcpip.h "struct sockaddr_storage"
4488     else
4489         disable network
4490     fi
4491 fi
4492
4493 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4494 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4495 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4496 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4497
4498 case "$custom_allocator" in
4499     jemalloc)
4500         # jemalloc by default does not use a prefix
4501         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4502     ;;
4503     tcmalloc)
4504         require_pkg_config libtcmalloc libtcmalloc gperftools/tcmalloc.h tc_malloc
4505         malloc_prefix=tc_
4506     ;;
4507 esac
4508
4509 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4510 check_func  ${malloc_prefix}memalign            && enable memalign
4511 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4512
4513 test_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4514     { check_lib clock_gettime time.h clock_gettime ||
4515       check_lib clock_gettime time.h clock_gettime -lrt; }
4516
4517 check_func  fcntl
4518 check_func  gethrtime
4519 check_func  getopt
4520 check_func  getrusage
4521 check_func  gettimeofday
4522 check_func  gmtime_r
4523 check_func  isatty
4524 check_func  localtime_r
4525 check_func  mkstemp
4526 check_func  mmap
4527 check_func  mprotect
4528 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4529 check_func_headers time.h nanosleep || check_lib nanosleep time.h nanosleep -lrt
4530 check_func  sched_getaffinity
4531 check_func  setrlimit
4532 check_func  strerror_r
4533 check_func  sysconf
4534 check_func  sysctl
4535 check_func  usleep
4536
4537 check_func_headers io.h setmode
4538 check_func_headers mach/mach_time.h mach_absolute_time
4539 check_func_headers stdlib.h getenv
4540
4541 check_func_headers windows.h GetProcessAffinityMask
4542 check_func_headers windows.h GetProcessTimes
4543 check_func_headers windows.h GetSystemTimeAsFileTime
4544 check_func_headers windows.h LoadLibrary
4545 check_func_headers windows.h MapViewOfFile
4546 check_func_headers windows.h SetConsoleTextAttribute
4547 check_func_headers windows.h Sleep
4548 check_func_headers windows.h VirtualAlloc
4549 check_struct windows.h "CONDITION_VARIABLE" Ptr
4550
4551 check_header direct.h
4552 check_header dxgidebug.h
4553 check_header dxva.h
4554 check_header dxva2api.h
4555 check_header io.h
4556 check_header malloc.h
4557 check_header poll.h
4558 check_header sys/param.h
4559 check_header sys/resource.h
4560 check_header sys/select.h
4561 check_header sys/time.h
4562 check_header sys/un.h
4563 check_header unistd.h
4564 check_header valgrind/valgrind.h
4565 check_header VideoDecodeAcceleration/VDADecoder.h
4566 check_header windows.h
4567
4568 # it seems there are versions of clang in some distros that try to use the
4569 # gcc headers, which explodes for stdatomic
4570 # so we also check that atomics actually work here
4571 check_builtin stdatomic stdatomic.h "atomic_int foo; atomic_store(&foo, 0)"
4572
4573 check_lib ole32    "windows.h"            CoTaskMemFree        -lole32
4574 check_lib shell32  "windows.h shellapi.h" CommandLineToArgvW   -lshell32
4575 check_lib wincrypt "windows.h wincrypt.h" CryptGenRandom       -ladvapi32
4576 check_lib psapi    "windows.h psapi.h"    GetProcessMemoryInfo -lpsapi
4577
4578 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4579
4580 check_type "cuviddec.h" "CUVIDH264PICPARAMS"
4581 check_type "cuviddec.h" "CUVIDHEVCPICPARAMS"
4582 check_struct "cuviddec.h" "CUVIDDECODECREATEINFO" bitDepthMinus8
4583
4584 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4585 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4586 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4587
4588 check_type "va/va.h va/va_dec_hevc.h" "VAPictureParameterBufferHEVC"
4589 check_type "va/va.h va/va_dec_vp8.h" "VAPictureParameterBufferVP8"
4590 check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
4591 check_type "va/va.h va/va_enc_h264.h" "VAEncPictureParameterBufferH264"
4592 check_type "va/va.h va/va_enc_hevc.h" "VAEncPictureParameterBufferHEVC"
4593 check_type "va/va.h va/va_enc_jpeg.h" "VAEncPictureParameterBufferJPEG"
4594 check_type "va/va.h va/va_enc_mpeg2.h" "VAEncPictureParameterBufferMPEG2"
4595 check_type "va/va.h va/va_enc_vp8.h"  "VAEncPictureParameterBufferVP8"
4596 check_type "va/va.h va/va_enc_vp9.h"  "VAEncPictureParameterBufferVP9"
4597
4598 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4599
4600 if ! disabled w32threads && ! enabled pthreads; then
4601     check_lib w32threads "windows.h process.h" _beginthreadex
4602 fi
4603
4604 # check for some common methods of building with pthread support
4605 # do this before the optional library checks as some of them require pthreads
4606 if ! disabled pthreads && ! enabled w32threads; then
4607     if check_lib pthreads pthread.h pthread_join -pthread; then
4608         add_cflags -pthread
4609     elif check_lib pthreads pthread.h pthread_join -pthreads; then
4610         add_cflags -pthreads
4611     elif check_lib pthreads pthread.h pthread_join -lpthreadGC2; then
4612         :
4613     elif check_lib pthreads pthread.h pthread_join -lpthread; then
4614         :
4615     elif check_func pthread_join; then
4616         enable pthreads
4617     fi
4618     enabled pthreads &&
4619         check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwait(s,0); sem_destroy(s)" $pthreads_extralibs
4620 fi
4621
4622 disabled  zlib || check_lib  zlib  zlib.h      zlibVersion -lz
4623 disabled bzlib || check_lib bzlib bzlib.h BZ2_bzlibVersion -lbz2
4624
4625 # On some systems dynamic loading requires no extra linker flags
4626 check_lib libdl dlfcn.h dlopen || check_lib libdl dlfcn.h dlopen -ldl
4627
4628 check_lib libm math.h sin -lm
4629
4630 atan2f_args=2
4631 ldexpf_args=2
4632 powf_args=2
4633
4634 for func in $MATH_FUNCS; do
4635     eval check_mathfunc $func \${${func}_args:-1} $libm_extralibs
4636 done
4637
4638 # these are off by default, so fail if requested and not available
4639 enabled amf               && require_cpp_condition AMF/core/Version.h "(AMF_VERSION_MAJOR << 48 | AMF_VERSION_MINOR << 32 | AMF_VERSION_RELEASE << 16 | AMF_VERSION_BUILD_NUM) >= 0x0001000400040001"
4640 enabled avisynth          && require_header avisynth/avisynth_c.h
4641 enabled avxsynth          && require_header avxsynth/avxsynth_c.h
4642 enabled cuda              && require cuda cuda.h cuInit -lcuda
4643 enabled cuvid             && require cuvid cuviddec.h cuvidCreateDecoder -lnvcuvid
4644 enabled frei0r            && require_header frei0r.h
4645 enabled gnutls            && require_pkg_config gnutls gnutls gnutls/gnutls.h gnutls_global_init &&
4646                              check_lib gmp gmp.h mpz_export -lgmp
4647 enabled libaom            && require_pkg_config libaom "aom >= 0.1.0" aom/aom_codec.h aom_codec_version
4648 enabled libbs2b           && require_pkg_config libbs2b libbs2b bs2b.h bs2b_open
4649 enabled libdc1394         && require_pkg_config libdc1394 libdc1394-2 dc1394/dc1394.h dc1394_new
4650 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4651 enabled libfaac           && require libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4652 enabled libfdk_aac        && require_pkg_config libfdk_aac fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4653 enabled libfontconfig     && require_pkg_config libfontconfig fontconfig "fontconfig/fontconfig.h" FcInit
4654 enabled libfreetype       && require_pkg_config libfreetype freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4655 enabled libgsm            && require libgsm gsm.h gsm_create -lgsm
4656 enabled libhdcd           && require_pkg_config libhdcd libhdcd "hdcd/hdcd_simple.h" hdcd_new
4657 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4658 enabled libkvazaar        && require_pkg_config libkvazaar "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4659 enabled libmfx            && require_pkg_config libmfx libmfx "mfx/mfxvideo.h" MFXInit
4660 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4661 enabled libnpp            && require libnpp npp.h nppGetLibVersion -lnppi -lnppc
4662 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4663 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4664 enabled libopencv         && require_pkg_config libopencv opencv opencv/cv.h cvCreateImageHeader
4665 enabled libopenh264       && require_pkg_config libopenh264 openh264 wels/codec_api.h WelsGetCodecVersion
4666 enabled libopenjpeg       && { check_lib libopenjpeg openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC ||
4667                                require_pkg_config libopenjpeg libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; }
4668 enabled libopus           && require_pkg_config libopus opus opus_multistream.h opus_multistream_decoder_create
4669 enabled libpulse          && require_pkg_config libpulse libpulse-simple pulse/simple.h pa_simple_new
4670 enabled librtmp           && require_pkg_config librtmp librtmp librtmp/rtmp.h RTMP_Socket
4671 enabled libschroedinger   && require_pkg_config libschroedinger schroedinger-1.0 schroedinger/schro.h schro_init
4672 enabled libsnappy         && require libsnappy snappy-c.h snappy_compress -lsnappy
4673 enabled libspeex          && require_pkg_config libspeex speex speex/speex.h speex_decoder_init
4674 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4675 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4676 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4677 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4678 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4679 enabled libvpx            && require_pkg_config libvpx "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version &&
4680                              { enabled libvpx_vp8_decoder &&
4681                                    check_pkg_config libvpx_vp8_decoder vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx
4682                                enabled libvpx_vp8_encoder &&
4683                                    check_pkg_config libvpx_vp8_encoder vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx
4684                                enabled libvpx_vp9_decoder &&
4685                                    check_pkg_config libvpx_vp9_decoder vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx
4686                                enabled libvpx_vp9_encoder &&
4687                                    check_pkg_config libvpx_vp9_encoder vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx
4688                                disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder &&
4689                                    die "libvpx enabled but no supported decoders/encoders found"
4690                              }
4691 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4692 enabled libwebp           && require_pkg_config libwebp libwebp webp/encode.h WebPGetEncoderVersion
4693 enabled libx264           && require_pkg_config libx264 x264 "stdint.h x264.h" x264_encoder_encode &&
4694                              require_cpp_condition x264.h "X264_BUILD >= 118" &&
4695                              check_cpp_condition libx262 x264.h "X264_MPEG2"
4696 enabled libx265           && require_pkg_config libx265 x265 x265.h x265_api_get &&
4697                              require_cpp_condition x265.h "X265_BUILD >= 57"
4698 enabled libxavs           && require libxavs "stdint.h xavs.h" xavs_encoder_encode -lxavs
4699 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4700 enabled mmal              && { check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4701                                { ! enabled cross_compile &&
4702                                  add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline &&
4703                                  add_ldflags -L/opt/vc/lib/ &&
4704                                  check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host; } ||
4705                                die "ERROR: mmal not found" &&
4706                                check_func_headers interface/mmal/mmal.h "MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS"; }
4707 enabled nvenc             && require_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 6"
4708 enabled omx               && require_header OMX_Core.h
4709 enabled omx_rpi           && { check_header OMX_Core.h ||
4710                                { ! enabled cross_compile && add_cflags -isystem/opt/vc/include/IL && check_header OMX_Core.h ; } ||
4711                                die "ERROR: OpenMAX IL headers not found"; } && enable omx
4712 enabled openssl           && { { check_pkg_config openssl openssl openssl/ssl.h OPENSSL_init_ssl ||
4713                                  check_pkg_config openssl openssl openssl/ssl.h SSL_library_init; } ||
4714                                check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4715                                check_lib openssl openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4716                                check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4717                                die "ERROR: openssl not found"; }
4718
4719 # SDL adds some CFLAGS that should not be part of the general CFLAGS.
4720 enabled avplay &&
4721     test_pkg_config sdl "sdl >= 1.2.1 sdl < 1.3.0" SDL_events.h SDL_PollEvent
4722
4723 check_header linux/fb.h
4724 check_header linux/videodev2.h
4725 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4726
4727 check_header AVFoundation/AVFoundation.h
4728
4729 check_header sys/videoio.h
4730
4731 check_lib user32 "windows.h winuser.h" GetShellWindow -luser32
4732 check_lib vfw32 "windows.h vfw.h" capCreateCaptureWindow -lvfw32
4733 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4734 # w32api 3.12 had it defined wrong
4735 check_cpp_condition vfwcap_defines vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER"
4736
4737 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4738 check_header "dev/bktr/ioctl_meteor.h dev/bktr/ioctl_bt848.h"                   ||
4739     check_header "machine/ioctl_meteor.h machine/ioctl_bt848.h"                 ||
4740     check_header "dev/video/meteor/ioctl_meteor.h dev/video/bktr/ioctl_bt848.h" ||
4741     check_header "dev/ic/bt8xx.h"
4742
4743 check_header sys/soundcard.h
4744
4745 enabled alsa_indev &&
4746     check_lib alsa alsa/asoundlib.h snd_pcm_htimestamp -lasound
4747
4748 enabled libjack &&
4749     require_pkg_config libjack jack jack/jack.h jack_port_get_latency_range
4750
4751 enabled sndio_indev && check_lib sndio sndio.h sio_open -lsndio
4752
4753 if enabled libcdio; then
4754     check_lib libcdio "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4755     check_lib libcdio "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4756     die "ERROR: No usable libcdio/cdparanoia found"
4757 fi
4758
4759 if enabled libxcb; then
4760     require_pkg_config libxcb xcb xcb/xcb.h xcb_connect
4761     require_pkg_config libxcb_shape xcb-shape xcb/shape.h xcb_shape_rectangles
4762     disabled libxcb_shm ||
4763         check_pkg_config libxcb_shm xcb-shm xcb/shm.h xcb_shm_attach
4764     disabled libxcb_xfixes ||
4765         check_pkg_config libxcb_xfixes xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image
4766 fi
4767
4768 # d3d11va requires linking directly to dxgi and d3d11 if not building for
4769 # the desktop api partition
4770 test_cpp <<EOF && enable uwp && d3d11va_extralibs="-ldxgi -ld3d11"
4771 #ifdef WINAPI_FAMILY
4772 #include <winapifamily.h>
4773 #if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4774 #error desktop, not uwp
4775 #else
4776 // WINAPI_FAMILY_APP, WINAPI_FAMILY_PHONE_APP => UWP
4777 #endif
4778 #else
4779 #error no family set
4780 #endif
4781 EOF
4782
4783 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4784
4785 if enabled vaapi; then
4786      require_cc vaapi "va/va.h" "vaCreateSurfaces(0, 0, 0, 0, 0, 0, 0, 0)"
4787      check_lib vaapi_drm "va/va.h va/va_drm.h" vaGetDisplayDRM -lva -lva-drm
4788      check_lib vaapi_x11 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 -lX11
4789 fi
4790
4791 enabled vaapi &&
4792     test_cpp_condition "va/va.h" "VA_CHECK_VERSION(1, 0, 0)" &&
4793     enable vaapi_1
4794
4795 enabled vdpau &&
4796     check_cpp_condition vdpau vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP"
4797
4798 enabled vdpau &&
4799     check_lib vdpau_x11 "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau -lX11
4800
4801 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4802
4803 # add some useful compiler flags if supported
4804 check_cflags -Wdeclaration-after-statement
4805 check_cflags -Wall
4806 check_cflags -Wdisabled-optimization
4807 check_cflags -Wpointer-arith
4808 check_cflags -Wredundant-decls
4809 check_cflags -Wwrite-strings
4810 check_cflags -Wtype-limits
4811 check_cflags -Wundef
4812 check_cflags -Wmissing-prototypes
4813 check_cflags -Wstrict-prototypes
4814
4815 if enabled extra_warnings; then
4816     check_cflags -Wcast-qual
4817     check_cflags -Wextra
4818     check_cflags -Wpedantic
4819 fi
4820
4821 check_disable_warning(){
4822     warning_flag=-W${1#-Wno-}
4823     test_cflags $warning_flag && add_cflags $1
4824 }
4825
4826 check_disable_warning -Wno-parentheses
4827 check_disable_warning -Wno-switch
4828 check_disable_warning -Wno-format-zero-length
4829 check_disable_warning -Wno-pointer-sign
4830
4831 check_disable_warning_headers(){
4832     warning_flag=-W${1#-Wno-}
4833     test_cflags $warning_flag && add_cflags_headers $1
4834 }
4835
4836 check_disable_warning_headers -Wno-deprecated-declarations
4837 check_disable_warning_headers -Wno-unused-variable
4838
4839 check_objcflags -fobjc-arc && enable objc_arc
4840
4841 check_cc blocks_extension "" "void (^block)(void)"
4842
4843 # add some linker flags
4844 check_ldflags -Wl,--warn-common
4845 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4846 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir && add_ldsoflags -Wl,-rpath,$libdir
4847 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
4848
4849 # add some strip flags
4850 # -wN '..@*' is more selective than -x, but not available everywhere.
4851 check_stripflags -wN \'..@*\' || check_stripflags -x || strip='true'
4852
4853 enabled neon_clobber_test &&
4854     check_ldflags -Wl,--wrap,avcodec_open2              \
4855                   -Wl,--wrap,avcodec_decode_audio4      \
4856                   -Wl,--wrap,avcodec_decode_video2      \
4857                   -Wl,--wrap,avcodec_decode_subtitle2   \
4858                   -Wl,--wrap,avcodec_encode_audio2      \
4859                   -Wl,--wrap,avcodec_encode_video2      \
4860                   -Wl,--wrap,avcodec_encode_subtitle    \
4861                   -Wl,--wrap,avcodec_send_packet        \
4862                   -Wl,--wrap,avcodec_receive_packet     \
4863                   -Wl,--wrap,avcodec_send_frame         \
4864                   -Wl,--wrap,avcodec_receive_frame      \
4865                   -Wl,--wrap,avresample_convert ||
4866     disable neon_clobber_test
4867
4868 enabled xmm_clobber_test &&
4869     check_ldflags -Wl,--wrap,avcodec_open2              \
4870                   -Wl,--wrap,avcodec_decode_audio4      \
4871                   -Wl,--wrap,avcodec_decode_video2      \
4872                   -Wl,--wrap,avcodec_decode_subtitle2   \
4873                   -Wl,--wrap,avcodec_encode_audio2      \
4874                   -Wl,--wrap,avcodec_encode_video2      \
4875                   -Wl,--wrap,avcodec_encode_subtitle    \