configure 138 KB
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#!/bin/sh
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#
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# Libav configure script
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#
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# Copyright (c) 2000-2002 Fabrice Bellard
# Copyright (c) 2005-2008 Diego Biurrun
# Copyright (c) 2005-2008 Mans Rullgard
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#
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# Prevent locale nonsense from breaking basic text processing.
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LC_ALL=C
export LC_ALL
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# make sure we are running under a compatible shell
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# try to make this part work with most shells

try_exec(){
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    echo "Trying shell $1"
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    type "$1" > /dev/null 2>&1 && exec "$@"
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}

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unset foo
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(: ${foo%%bar}) 2> /dev/null
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E1="$?"

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(: ${foo?}) 2> /dev/null
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E2="$?"

if test "$E1" != 0 || test "$E2" = 0; then
    echo "Broken shell detected.  Trying alternatives."
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    export FF_CONF_EXEC
    if test "0$FF_CONF_EXEC" -lt 1; then
        FF_CONF_EXEC=1
        try_exec bash "$0" "$@"
    fi
    if test "0$FF_CONF_EXEC" -lt 2; then
        FF_CONF_EXEC=2
        try_exec ksh "$0" "$@"
    fi
    if test "0$FF_CONF_EXEC" -lt 3; then
        FF_CONF_EXEC=3
        try_exec /usr/xpg4/bin/sh "$0" "$@"
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    fi
    echo "No compatible shell script interpreter found."
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    echo "This configure script requires a POSIX-compatible shell"
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    echo "such as bash or ksh."
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    echo "THIS IS NOT A BUG IN LIBAV, DO NOT REPORT IT AS SUCH."
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    echo "Instead, install a working POSIX-compatible shell."
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    echo "Disabling this configure test will create a broken Libav."
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    if test "$BASH_VERSION" = '2.04.0(1)-release'; then
        echo "This bash version ($BASH_VERSION) is broken on your platform."
        echo "Upgrade to a later version if available."
    fi
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    exit 1
fi

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test -d /usr/xpg4/bin && PATH=/usr/xpg4/bin:$PATH

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show_help(){
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    cat <<EOF
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Usage: configure [options]
Options: [defaults in brackets after descriptions]

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Help options:
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  --help                   print this message
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  --list-decoders          show all available decoders
  --list-encoders          show all available encoders
  --list-hwaccels          show all available hardware accelerators
  --list-demuxers          show all available demuxers
  --list-muxers            show all available muxers
  --list-parsers           show all available parsers
  --list-protocols         show all available protocols
  --list-bsfs              show all available bitstream filters
  --list-indevs            show all available input devices
  --list-outdevs           show all available output devices
  --list-filters           show all available filters

Standard options:
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  --logfile=FILE           log tests and output to FILE [config.log]
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  --disable-logging        do not log configure debug information
  --prefix=PREFIX          install in PREFIX [$prefix]
  --bindir=DIR             install binaries in DIR [PREFIX/bin]
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  --datadir=DIR            install data files in DIR [PREFIX/share/avconv]
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  --docdir=DIR             install documentation in DIR [PREFIX/share/doc/libav]
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  --libdir=DIR             install libs in DIR [PREFIX/lib]
  --shlibdir=DIR           install shared libs in DIR [PREFIX/lib]
  --incdir=DIR             install includes in DIR [PREFIX/include]
  --mandir=DIR             install man page in DIR [PREFIX/share/man]

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Licensing options:
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  --enable-gpl             allow use of GPL code, the resulting libs
                           and binaries will be under GPL [no]
  --enable-version3        upgrade (L)GPL to version 3 [no]
  --enable-nonfree         allow use of nonfree code, the resulting libs
                           and binaries will be unredistributable [no]
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Configuration options:
  --disable-static         do not build static libraries [no]
  --enable-shared          build shared libraries [no]
  --enable-small           optimize for size instead of speed
  --enable-runtime-cpudetect detect cpu capabilities at runtime (bigger binary)
  --enable-gray            enable full grayscale support (slower color)
  --disable-swscale-alpha  disable alpha channel support in swscale
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  --disable-all            disable building components, libraries and programs
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Program options:
  --disable-programs       do not build command line programs
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  --disable-avconv         disable avconv build
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  --disable-avplay         disable avplay build
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  --disable-avprobe        disable avprobe build
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  --disable-avserver       disable avserver build
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Component options:
  --disable-doc            do not build documentation
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  --disable-avdevice       disable libavdevice build
  --disable-avcodec        disable libavcodec build
  --disable-avformat       disable libavformat build
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  --disable-avutil         disable libavutil build
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  --disable-swscale        disable libswscale build
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  --disable-avfilter       disable video filter support [no]
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  --disable-avresample     disable libavresample build [no]
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  --disable-pthreads       disable pthreads [auto]
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  --disable-w32threads     disable Win32 threads [auto]
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  --disable-network        disable network support [no]
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  --disable-dct            disable DCT code
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  --disable-error-resilience disable error resilience code
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  --disable-lsp            disable LSP code
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  --disable-lzo            disable LZO decoder code
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  --disable-mdct           disable MDCT code
  --disable-rdft           disable RDFT code
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  --disable-fft            disable FFT code
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Hardware accelerators:
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  --enable-dxva2           enable DXVA2 code
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  --enable-vaapi           enable VAAPI code
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  --enable-vda             enable VDA code
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  --enable-vdpau           enable VDPAU code
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Individual component options:
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  --disable-everything     disable all components listed below
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  --disable-encoder=NAME   disable encoder NAME
  --enable-encoder=NAME    enable encoder NAME
  --disable-encoders       disable all encoders
  --disable-decoder=NAME   disable decoder NAME
  --enable-decoder=NAME    enable decoder NAME
  --disable-decoders       disable all decoders
  --disable-hwaccel=NAME   disable hwaccel NAME
  --enable-hwaccel=NAME    enable hwaccel NAME
  --disable-hwaccels       disable all hwaccels
  --disable-muxer=NAME     disable muxer NAME
  --enable-muxer=NAME      enable muxer NAME
  --disable-muxers         disable all muxers
  --disable-demuxer=NAME   disable demuxer NAME
  --enable-demuxer=NAME    enable demuxer NAME
  --disable-demuxers       disable all demuxers
  --enable-parser=NAME     enable parser NAME
  --disable-parser=NAME    disable parser NAME
  --disable-parsers        disable all parsers
  --enable-bsf=NAME        enable bitstream filter NAME
  --disable-bsf=NAME       disable bitstream filter NAME
  --disable-bsfs           disable all bitstream filters
  --enable-protocol=NAME   enable protocol NAME
  --disable-protocol=NAME  disable protocol NAME
  --disable-protocols      disable all protocols
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  --enable-indev=NAME      enable input device NAME
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  --disable-indev=NAME     disable input device NAME
  --disable-indevs         disable input devices
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  --enable-outdev=NAME     enable output device NAME
  --disable-outdev=NAME    disable output device NAME
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  --disable-outdevs        disable output devices
  --disable-devices        disable all devices
  --enable-filter=NAME     enable filter NAME
  --disable-filter=NAME    disable filter NAME
  --disable-filters        disable all filters

External library support:
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  --enable-avisynth        enable reading of AviSynth script files [no]
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  --enable-bzlib           enable bzlib [autodetect]
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  --enable-frei0r          enable frei0r video filtering
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  --enable-gnutls          enable gnutls [no]
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  --enable-libbs2b         enable bs2b DSP library [no]
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  --enable-libcdio         enable audio CD grabbing with libcdio
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  --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394
                           and libraw1394 [no]
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  --enable-libfaac         enable AAC encoding via libfaac [no]
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  --enable-libfdk-aac      enable AAC de/encoding via libfdk-aac [no]
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  --enable-libfreetype     enable libfreetype [no]
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  --enable-libgsm          enable GSM de/encoding via libgsm [no]
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  --enable-libilbc         enable iLBC de/encoding via libilbc [no]
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  --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
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  --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
  --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
  --enable-libopencv       enable video filtering via libopencv [no]
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  --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]
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  --enable-libopus         enable Opus decoding via libopus [no]
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  --enable-libpulse        enable Pulseaudio input via libpulse [no]
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  --enable-librtmp         enable RTMP[E] support via librtmp [no]
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  --enable-libschroedinger enable Dirac de/encoding via libschroedinger [no]
  --enable-libspeex        enable Speex de/encoding via libspeex [no]
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  --enable-libtheora       enable Theora encoding via libtheora [no]
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  --enable-libtwolame      enable MP2 encoding via libtwolame [no]
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  --enable-libvo-aacenc    enable AAC encoding via libvo-aacenc [no]
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  --enable-libvo-amrwbenc  enable AMR-WB encoding via libvo-amrwbenc [no]
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  --enable-libvorbis       enable Vorbis encoding via libvorbis [no]
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  --enable-libvpx          enable VP8 and VP9 de/encoding via libvpx [no]
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  --enable-libwavpack      enable wavpack encoding via libwavpack [no]
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  --enable-libwebp         enable WebP encoding via libwebp [no]
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  --enable-libx264         enable H.264 encoding via x264 [no]
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  --enable-libx265         enable HEVC encoding via x265 [no]
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  --enable-libxavs         enable AVS encoding via xavs [no]
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  --enable-libxvid         enable Xvid encoding via xvidcore,
                           native MPEG-4/Xvid encoder exists [no]
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  --enable-openssl         enable openssl [no]
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  --enable-x11grab         enable X11 grabbing [no]
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  --enable-zlib            enable zlib [autodetect]

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Toolchain options:
  --arch=ARCH              select architecture [$arch]
  --cpu=CPU                select the minimum required CPU (affects
                           instruction selection, may crash on older CPUs)
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  --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
  --enable-cross-compile   assume a cross-compiler is used
  --sysroot=PATH           root of cross-build tree
  --sysinclude=PATH        location of cross-build system headers
  --target-os=OS           compiler targets OS [$target_os]
  --target-exec=CMD        command to run executables on target
  --target-path=DIR        path to view of build directory on target
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  --target-samples=DIR     path to samples directory on target
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  --toolchain=NAME         set tool defaults according to NAME
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  --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
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  --nm=NM                  use nm tool
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  --ar=AR                  use archive tool AR [$ar_default]
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  --as=AS                  use assembler AS [$as_default]
  --cc=CC                  use C compiler CC [$cc_default]
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  --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
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  --ld=LD                  use linker LD
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  --pkg-config=PKGCONF     use pkg-config PKGCONF [$pkg_config_default]
  --pkg-config-flags=FLAGS pass additional flags to pkgconf []
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  --host-cc=HOSTCC         use host C compiler HOSTCC
  --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
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  --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
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  --host-ld=HOSTLD         use host linker HOSTLD
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  --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
  --host-libs=HLIBS        use libs HLIBS when linking for host
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  --host-os=OS             compiler host OS [$target_os]
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  --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
  --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
  --extra-libs=ELIBS       add ELIBS [$ELIBS]
  --extra-version=STRING   version string suffix []
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  --optflags=OPTFLAGS      override optimization-related compiler flags
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  --build-suffix=SUFFIX    library name suffix []
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  --enable-pic             build position-independent code
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  --enable-thumb           compile for Thumb instruction set
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  --enable-lto             use link-time optimization

Advanced options (experts only):
  --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
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  --disable-symver         disable symbol versioning
  --enable-hardcoded-tables use hardcoded tables instead of runtime generation
  --disable-safe-bitstream-reader
                           disable buffer boundary checking in bitreaders
                           (faster, but may crash)
  --enable-memalign-hack   emulate memalign, interferes with memory debuggers
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  --enable-sram            allow use of on-chip SRAM
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Optimization options (experts only):
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  --disable-asm            disable all assembler optimizations
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  --disable-altivec        disable AltiVec optimizations
  --disable-amd3dnow       disable 3DNow! optimizations
  --disable-amd3dnowext    disable 3DNow! extended optimizations
  --disable-mmx            disable MMX optimizations
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  --disable-mmxext         disable MMXEXT optimizations
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  --disable-sse            disable SSE optimizations
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  --disable-sse2           disable SSE2 optimizations
  --disable-sse3           disable SSE3 optimizations
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  --disable-ssse3          disable SSSE3 optimizations
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  --disable-sse4           disable SSE4 optimizations
  --disable-sse42          disable SSE4.2 optimizations
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  --disable-avx            disable AVX optimizations
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  --disable-xop            disable XOP optimizations
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  --disable-fma3           disable FMA3 optimizations
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  --disable-fma4           disable FMA4 optimizations
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  --disable-avx2           disable AVX2 optimizations
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  --disable-armv5te        disable armv5te optimizations
  --disable-armv6          disable armv6 optimizations
  --disable-armv6t2        disable armv6t2 optimizations
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  --disable-vfp            disable VFP optimizations
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  --disable-neon           disable NEON optimizations
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  --disable-inline-asm     disable use of inline assembler
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  --disable-yasm           disable use of yasm assembler

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Developer options (useful when working on Libav itself):
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  --disable-debug          disable debugging symbols
  --enable-debug=LEVEL     set the debug level [$debuglevel]
  --disable-optimizations  disable compiler optimizations
  --enable-extra-warnings  enable more compiler warnings
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  --samples=PATH           location of test samples for FATE, if not set use
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                           \$LIBAV_SAMPLES at make invocation time.
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  --enable-neon-clobber-test check NEON registers for clobbering (should be
                           used only for debugging purposes)
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  --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
                           should be used only for debugging purposes)
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  --enable-random          randomly enable/disable components
  --disable-random
  --enable-random=LIST     randomly enable/disable specific components or
  --disable-random=LIST    component groups. LIST is a comma-separated list
                           of NAME[:PROB] entries where NAME is a component
                           (group) and PROB the probability associated with
                           NAME (default 0.5).
  --random-seed=VALUE      seed value for --enable/disable-random
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NOTE: Object files are built at the place where configure is launched.
EOF
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  exit 0
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}
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quotes='""'

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log(){
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    echo "$@" >> $logfile
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}

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log_file(){
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    log BEGIN $1
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    pr -n -t $1 >> $logfile
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    log END $1
}

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echolog(){
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    log "$@"
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    echo "$@"
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}

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warn(){
    log "WARNING: $*"
    WARNINGS="${WARNINGS}WARNING: $*\n"
}

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die(){
    echolog "$@"
    cat <<EOF
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If you think configure made a mistake, make sure you are using the latest
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version from Git.  If the latest version fails, report the problem to the
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libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
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EOF
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    if disabled logging; then
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        cat <<EOF
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Rerun configure with logging enabled (do not use --disable-logging), and
include the log this produces with your report.
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EOF
    else
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        cat <<EOF
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Include the log file "$logfile" produced by configure as this will help
solving the problem.
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EOF
    fi
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    exit 1
}

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# Avoid locale weirdness, besides we really just want to translate ASCII.
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toupper(){
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    echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
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}

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tolower(){
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    echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
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}

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c_escape(){
    echo "$*" | sed 's/["\\]/\\\0/g'
}

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sh_quote(){
    v=$(echo "$1" | sed "s/'/'\\\\''/g")
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    test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
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    echo "$v"
}

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cleanws(){
    echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
}

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filter(){
    pat=$1
    shift
    for v; do
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        eval "case $v in $pat) echo $v ;; esac"
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    done
}

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filter_out(){
    pat=$1
    shift
    for v; do
        eval "case $v in $pat) ;; *) echo $v ;; esac"
    done
}

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map(){
    m=$1
    shift
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    for v; do eval $m; done
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}

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add_suffix(){
    suffix=$1
    shift
    for v; do echo ${v}${suffix}; done
}

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set_all(){
    value=$1
    shift
    for var in $*; do
        eval $var=$value
    done
}

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set_weak(){
    value=$1
    shift
    for var; do
        eval : \${$var:=$value}
    done
}

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sanitize_var_name(){
    echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
}

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set_safe(){
    var=$1
    shift
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    eval $(sanitize_var_name "$var")='$*'
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}

get_safe(){
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    eval echo \$$(sanitize_var_name "$1")
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}

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pushvar(){
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    for pvar in $*; do
        eval level=\${${pvar}_level:=0}
        eval ${pvar}_${level}="\$$pvar"
        eval ${pvar}_level=$(($level+1))
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    done
}

popvar(){
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    for pvar in $*; do
        eval level=\${${pvar}_level:-0}
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        test $level = 0 && continue
        eval level=$(($level-1))
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        eval $pvar="\${${pvar}_${level}}"
        eval ${pvar}_level=$level
        eval unset ${pvar}_${level}
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    done
}

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enable(){
    set_all yes $*
}

disable(){
    set_all no $*
}

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enable_weak(){
    set_weak yes $*
}

disable_weak(){
    set_weak no $*
}

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enable_safe(){
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    for var; do
        enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
    done
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}

disable_safe(){
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    for var; do
        disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
    done
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}

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do_enable_deep(){
    for var; do
        enabled $var && continue
        eval sel="\$${var}_select"
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        eval sgs="\$${var}_suggest"
        pushvar var sgs
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        enable_deep $sel
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        popvar sgs
        enable_deep_weak $sgs
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        popvar var
    done
}

enable_deep(){
    do_enable_deep $*
    enable $*
}

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enable_deep_weak(){
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    for var; do
        disabled $var && continue
        pushvar var
        do_enable_deep $var
        popvar var
        enable_weak $var
    done
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}

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enabled(){
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    test "${1#!}" = "$1" && op== || op=!=
    eval test "x\$${1#!}" $op "xyes"
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}

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disabled(){
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    test "${1#!}" = "$1" && op== || op=!=
    eval test "x\$${1#!}" $op "xno"
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}

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enabled_all(){
    for opt; do
        enabled $opt || return 1
    done
}

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disabled_all(){
    for opt; do
        disabled $opt || return 1
    done
}

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enabled_any(){
    for opt; do
        enabled $opt && return 0
    done
}

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disabled_any(){
    for opt; do
        disabled $opt && return 0
    done
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    return 1
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}

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set_default(){
    for opt; do
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        eval : \${$opt:=\$${opt}_default}
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    done
}

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is_in(){
    value=$1
    shift
    for var in $*; do
        [ $var = $value ] && return 0
    done
    return 1
}

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do_check_deps(){
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    for cfg; do
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        cfg="${cfg#!}"
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        enabled ${cfg}_checking && die "Circular dependency for $cfg."
        disabled ${cfg}_checking && continue
        enable ${cfg}_checking
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        append allopts $cfg
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        eval dep_all="\$${cfg}_deps"
        eval dep_any="\$${cfg}_deps_any"
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        eval dep_sel="\$${cfg}_select"
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        eval dep_sgs="\$${cfg}_suggest"
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        eval dep_ifa="\$${cfg}_if"
        eval dep_ifn="\$${cfg}_if_any"
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        pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
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        do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
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        popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
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        [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
        [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
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        enabled_all  $dep_all || disable $cfg
        enabled_any  $dep_any || disable $cfg
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        disabled_any $dep_sel && disable $cfg
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        if enabled $cfg; then
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            enable_deep $dep_sel
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            enable_deep_weak $dep_sgs
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        fi

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        disable ${cfg}_checking
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    done
}

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check_deps(){
    unset allopts

    do_check_deps "$@"

    for cfg in $allopts; do
        enabled $cfg || continue
        eval dep_extralibs="\$${cfg}_extralibs"
        test -n "$dep_extralibs" && add_extralibs $dep_extralibs
    done
}

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print_config(){
    pfx=$1
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    files=$2
    shift 2
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    map 'eval echo "$v \${$v:-no}"' "$@" |
    awk "BEGIN { split(\"$files\", files) }
        {
            c = \"$pfx\" toupper(\$1);
            v = \$2;
            sub(/yes/, 1, v);
            sub(/no/,  0, v);
            for (f in files) {
                file = files[f];
                if (file ~ /\\.h\$/) {
                    printf(\"#define %s %d\\n\", c, v) >>file;
                } else if (file ~ /\\.asm\$/) {
                    printf(\"%%define %s %d\\n\", c, v) >>file;
                } else if (file ~ /\\.mak\$/) {
631
                    n = -v ? \"\" : \"!\";
632 633 634 635
                    printf(\"%s%s=yes\\n\", n, c) >>file;
                }
            }
        }"
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}

638 639 640 641
print_enabled(){
    suf=$1
    shift
    for v; do
642
        enabled $v && printf "%s\n" ${v%$suf};
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    done
}

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append(){
    var=$1
    shift
    eval "$var=\"\$$var $*\""
}

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prepend(){
    var=$1
    shift
    eval "$var=\"$* \$$var\""
}

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add_cppflags(){
659
    append CPPFLAGS "$@"
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}

662
add_cflags(){
663
    append CFLAGS $($cflags_filter "$@")
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}

666
add_asflags(){
667
    append ASFLAGS $($asflags_filter "$@")
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}

670
add_ldflags(){
671
    append LDFLAGS $($ldflags_filter "$@")
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}

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add_stripflags(){
    append STRIPFLAGS "$@"
}

678
add_extralibs(){
679
    prepend extralibs $($ldflags_filter "$@")
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}

682 683 684 685
add_host_cppflags(){
    append host_cppflags "$@"
}

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add_host_cflags(){
    append host_cflags $($host_cflags_filter "$@")
}

add_host_ldflags(){
    append host_ldflags $($host_ldflags_filter "$@")
}

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add_compat(){
    append compat_objs $1
    shift
    map 'add_cppflags -D$v' "$@"
}

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check_cmd(){
701
    log "$@"
702
    "$@" >> $logfile 2>&1
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}

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cc_o(){
    eval printf '%s\\n' $CC_O
}

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cc_e(){
    eval printf '%s\\n' $CC_E
}

713
check_cc(){
714
    log check_cc "$@"
715
    cat > $TMPC
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    log_file $TMPC
717
    check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
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}

check_cpp(){
    log check_cpp "$@"
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    cat > $TMPC
723
    log_file $TMPC
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    check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
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}

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as_o(){
    eval printf '%s\\n' $AS_O
}

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check_as(){
    log check_as "$@"
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    cat > $TMPS
    log_file $TMPS
    check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
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}

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check_inline_asm(){
    log check_inline_asm "$@"
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    name="$1"
741
    code="$2"
742
    shift 2
743
    disable $name
744
    check_cc "$@" <<EOF && enable $name
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void foo(void){ __asm__ volatile($code); }
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EOF
}

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check_insn(){
    log check_insn "$@"
    check_inline_asm ${1}_inline "\"$2\""
    echo "$2" | check_as && enable ${1}_external || disable ${1}_external
}

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check_yasm(){
    log check_yasm "$@"
    echo "$1" > $TMPS
    log_file $TMPS
    shift 1
    check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
}

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ld_o(){
    eval printf '%s\\n' $LD_O
}

767
check_ld(){
768
    log check_ld "$@"
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    flags=$(filter_out '-l*' "$@")
    libs=$(filter '-l*' "$@")
771
    check_cc $($cflags_filter $flags) || return
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    flags=$($ldflags_filter $flags)
    libs=$($ldflags_filter $libs)
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    check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
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}

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print_include(){
    hdr=$1
    test "${hdr%.h}" = "${hdr}" &&
        echo "#include $hdr"    ||
        echo "#include <$hdr>"
}

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check_code(){
    log check_code "$@"
    check=$1
    headers=$2
    code=$3
    shift 3
    {
        for hdr in $headers; do
792
            print_include $hdr
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        done
        echo "int main(void) { $code; return 0; }"
    } | check_$check "$@"
}

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check_cppflags(){
    log check_cppflags "$@"
800
    check_cc "$@" <<EOF && append CPPFLAGS "$@"
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int x;
EOF
}

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test_cflags(){
    log test_cflags "$@"
807
    set -- $($cflags_filter "$@")
808
    check_cc "$@" <<EOF
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int x;
EOF
}

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check_cflags(){
    log check_cflags "$@"
    test_cflags "$@" && add_cflags "$@"
}

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test_ldflags(){
    log test_ldflags "$@"
    check_ld "$@" <<EOF
821
int main(void){ return 0; }
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EOF
}

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check_ldflags(){
    log check_ldflags "$@"
    test_ldflags "$@" && add_ldflags "$@"
}

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test_stripflags(){
    log test_stripflags "$@"
    # call check_cc to get a fresh TMPO
    check_cc <<EOF
int main(void) { return 0; }
EOF
    check_cmd $strip $STRIPFLAGS "$@" $TMPO
}

check_stripflags(){
    log check_stripflags "$@"
    test_stripflags "$@" && add_stripflags "$@"
}

844
check_header(){
845
    log check_header "$@"
846 847
    header=$1
    shift
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    disable_safe $header
    check_cpp "$@" <<EOF && enable_safe $header
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#include <$header>
int x;
EOF
}

check_func(){
856
    log check_func "$@"
857 858
    func=$1
    shift
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859 860
    disable $func
    check_ld "$@" <<EOF && enable $func
861
extern int $func();
862
int main(void){ $func(); }
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EOF
}

866
check_mathfunc(){
867
    log check_mathfunc "$@"
868
    func=$1
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    narg=$2
    shift 2
    test $narg = 2 && args="f, g" || args="f"
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    disable $func
    check_ld "$@" <<EOF && enable $func
#include <math.h>
875
float foo(float f, float g) { return $func($args); }
876
int main(void){ return 0; }
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EOF
}

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check_func_headers(){
    log check_func_headers "$@"
882
    headers=$1
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    funcs=$2
884
    shift 2
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    {
        for hdr in $headers; do
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            print_include $hdr
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        done
        for func in $funcs; do
            echo "long check_$func(void) { return (long) $func; }"
        done
        echo "int main(void) { return 0; }"
    } | check_ld "$@" && enable $funcs && enable_safe $headers
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}

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check_cpp_condition(){
    log check_cpp_condition "$@"
    header=$1
    condition=$2
900
    shift 2
901
    check_cpp "$@" <<EOF
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#include <$header>
#if !($condition)
#error "unsatisfied condition: $condition"
#endif
EOF
}

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check_lib(){
    log check_lib "$@"
    header="$1"
    func="$2"
    shift 2
914
    check_header $header && check_func $func "$@" && add_extralibs "$@"
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}

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check_lib2(){
    log check_lib2 "$@"
    headers="$1"
920
    funcs="$2"
921
    shift 2
922
    check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
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}

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check_pkg_config(){
    log check_pkg_config "$@"
    pkg="$1"
    headers="$2"
    funcs="$3"
    shift 3
931
    check_cmd $pkg_config --exists --print-errors $pkg || return
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    pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
    pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
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    check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
        set_safe ${pkg}_cflags $pkg_cflags   &&
        set_safe ${pkg}_libs   $pkg_libs
}

939
check_exec(){
940
    check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
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}

943
check_exec_crash(){
944
    code=$(cat)
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    # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
    # are safe but may not be available everywhere.  Thus we use
    # raise(SIGTERM) instead.  The check is run in a subshell so we
    # can redirect the "Terminated" message from the shell.  SIGBUS
    # is not defined by standard C so it is used conditionally.

952
    (check_exec "$@") >> $logfile 2>&1 <<EOF
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#include <signal.h>
static void sighandler(int sig){
    raise(SIGTERM);
}
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int foo(void){
    $code
}
960
int (*func_ptr)(void) = foo;
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961
int main(void){
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    signal(SIGILL, sighandler);
    signal(SIGFPE, sighandler);
    signal(SIGSEGV, sighandler);
#ifdef SIGBUS
    signal(SIGBUS, sighandler);
#endif
968
    return func_ptr();
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}
EOF
}

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check_type(){
    log check_type "$@"
    headers=$1
    type=$2
    shift 2
978
    disable_safe "$type"
979
    check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
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}

982
check_struct(){
983
    log check_struct "$@"
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    headers=$1
    struct=$2
    member=$3
    shift 3
    disable_safe "${struct}_${member}"
989 990
    check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
        enable_safe "${struct}_${member}"
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}

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check_builtin(){
    log check_builtin "$@"
    name=$1
    headers=$2
    builtin=$3
    shift 3
    disable "$name"
    check_code ld "$headers" "$builtin" "$@" && enable "$name"
}

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check_compile_assert(){
    log check_compile_assert "$@"
    name=$1
    headers=$2
    condition=$3
    shift 3
    disable "$name"
    check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
}

1013 1014 1015 1016 1017 1018
require(){
    name="$1"
    header="$2"
    func="$3"
    shift 3
    check_lib $header $func "$@" || die "ERROR: $name not found"
1019 1020
}

1021 1022 1023 1024 1025 1026 1027 1028
require2(){
    name="$1"
    headers="$2"
    func="$3"
    shift 3
    check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
}

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require_pkg_config(){
    pkg="$1"
    check_pkg_config "$@" || die "ERROR: $pkg not found"
    add_cflags    $(get_safe ${pkg}_cflags)
    add_extralibs $(get_safe ${pkg}_libs)
}

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hostcc_e(){
    eval printf '%s\\n' $HOSTCC_E
}

1040 1041 1042 1043
hostcc_o(){
    eval printf '%s\\n' $HOSTCC_O
}

1044 1045 1046 1047
check_host_cc(){
    log check_host_cc "$@"
    cat > $TMPC
    log_file $TMPC
1048
    check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1049 1050
}

1051 1052 1053 1054 1055 1056 1057
check_host_cpp(){
    log check_host_cpp "$@"
    cat > $TMPC
    log_file $TMPC
    check_cmd $host_cc $HOSTCPPFLAGS $HOSTCFLAGS "$@" $(hostcc_e $TMPO) $TMPC
}

1058 1059 1060 1061 1062 1063 1064
check_host_cppflags(){
    log check_host_cppflags "$@"
    check_host_cc "$@" <<EOF && append host_cppflags "$@"
int x;
EOF
}

1065 1066
check_host_cflags(){
    log check_host_cflags "$@"
1067
    set -- $($host_cflags_filter "$@")
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    check_host_cc "$@" <<EOF && append host_cflags "$@"
int x;
EOF
}

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check_host_cpp_condition(){
    log check_host_cpp_condition "$@"
    header=$1
    condition=$2
    shift 2
    check_host_cpp "$@" <<EOF
#include <$header>
#if !($condition)
#error "unsatisfied condition: $condition"
#endif
EOF
}

1086 1087 1088 1089 1090 1091
apply(){
    file=$1
    shift
    "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
}

1092
cp_if_changed(){
1093 1094
    cmp -s "$1" "$2" && echo "$2 is unchanged" && return
    mkdir -p "$(dirname $2)"
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1095
    $cp_f "$1" "$2"
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}

1098 1099 1100
# CONFIG_LIST contains configurable options, while HAVE_LIST is for
# system-dependent things.

1101 1102 1103 1104 1105
COMPONENT_LIST="
    bsfs
    decoders
    demuxers
    encoders
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Vitor Sessak committed
1106
    filters
1107
    hwaccels
1108
    indevs
1109
    muxers
1110
    outdevs
1111 1112 1113 1114
    parsers
    protocols
"

1115
EXAMPLE_LIST="
1116
    avcodec_example
1117
    filter_audio_example
1118
    metadata_example
1119
    output_example
1120
    transcode_aac_example
1121 1122
"

1123 1124 1125 1126 1127
EXTERNAL_LIBRARY_LIST="
    avisynth
    bzlib
    frei0r
    gnutls
1128
    libbs2b
1129 1130 1131 1132
    libcdio
    libdc1394
    libfaac
    libfdk_aac
1133
    libfontconfig
1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147
    libfreetype
    libgsm
    libilbc
    libmp3lame
    libopencore_amrnb
    libopencore_amrwb
    libopencv
    libopenjpeg
    libopus
    libpulse
    librtmp
    libschroedinger
    libspeex
    libtheora
1148
    libtwolame
1149 1150 1151 1152
    libvo_aacenc
    libvo_amrwbenc
    libvorbis
    libvpx
1153
    libwavpack
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1154
    libwebp
1155
    libx264
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Derek Buitenhuis committed
1156
    libx265
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    libxavs
    libxvid
    openssl
    x11grab
    zlib
"

1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175
FEATURE_LIST="
    gray
    hardcoded_tables
    runtime_cpudetect
    safe_bitstream_reader
    shared
    small
    sram
    static
    swscale_alpha
"

1176 1177 1178 1179 1180 1181
HWACCEL_LIST="
    dxva2
    vaapi
    vda
    vdpau
"
1182

1183 1184 1185 1186 1187 1188 1189 1190 1191 1192
LIBRARY_LIST="
    avcodec
    avdevice
    avfilter
    avformat
    avresample
    avutil
    swscale
"

1193 1194 1195 1196 1197 1198
LICENSE_LIST="
    gpl
    nonfree
    version3
"

1199 1200 1201 1202 1203 1204 1205
PROGRAM_LIST="
    avconv
    avplay
    avprobe
    avserver
"

1206
SUBSYSTEM_LIST="
1207
    dct
1208
    doc
1209
    error_resilience
1210
    fft
1211
    lsp
1212
    lzo
1213
    mdct
1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227
    network
    rdft
"

CONFIG_LIST="
    $COMPONENT_LIST
    $EXAMPLE_LIST
    $EXTERNAL_LIBRARY_LIST
    $FEATURE_LIST
    $HWACCEL_LIST
    $LICENSE_LIST
    $LIBRARY_LIST
    $PROGRAM_LIST
    $SUBSYSTEM_LIST
1228
    memalign_hack
1229
    neon_clobber_test
1230
    pic
1231
    pod2man
1232
    texi2html
1233
    thumb
1234
    xmm_clobber_test
1235
"
1236

1237
THREADS_LIST="
1238 1239
    pthreads
    w32threads
1240
"
1241

1242
ATOMICS_LIST="
1243 1244
    atomics_gcc
    atomics_suncc
1245
    atomics_win32
1246
"
1247

1248
ARCH_LIST="
1249
    aarch64
1250
    alpha
1251
    arm
1252 1253 1254
    avr32
    avr32_ap
    avr32_uc
1255 1256 1257 1258
    bfin
    ia64
    m68k
    mips
1259
    mips64
1260
    parisc
1261
    ppc
1262
    ppc64
1263 1264 1265 1266
    s390
    sh4
    sparc
    sparc64
1267 1268
    tilegx
    tilepro
1269
    tomi
1270 1271 1272
    x86
    x86_32
    x86_64
1273
"
1274

1275
ARCH_EXT_LIST_ARM="
1276 1277 1278
    armv5te
    armv6
    armv6t2
1279
    armv8
1280
    neon
1281
    vfp
1282
    vfpv3
1283
"
1284

1285
ARCH_EXT_LIST_X86_SIMD="
1286
    amd3dnow
1287
    amd3dnowext
1288
    avx
1289
    avx2
1290
    fma3
1291 1292 1293 1294 1295 1296 1297 1298 1299
    fma4
    mmx
    mmxext
    sse
    sse2
    sse3
    sse4
    sse42
    ssse3
1300 1301
    xop
"
1302

1303 1304 1305 1306 1307 1308 1309
ARCH_EXT_LIST_PPC="
    altivec
    dcbzl
    ldbrx
    ppc4xx
"

1310 1311 1312 1313 1314 1315
ARCH_EXT_LIST_X86="
    $ARCH_EXT_LIST_X86_SIMD
    cpunop
    i686
"

1316
ARCH_EXT_LIST="
1317
    $ARCH_EXT_LIST_ARM
1318
    $ARCH_EXT_LIST_PPC
1319
    $ARCH_EXT_LIST_X86
1320 1321
    loongson
    vis
1322
"
1323

1324 <