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#!/bin/sh

#

# FFmpeg configure script

#

# Copyright (c) 2000-2002 Fabrice Bellard

# Copyright (c) 2005-2008 Diego Biurrun

# Copyright (c) 2005-2008 Mans Rullgard

#

# Prevent locale nonsense from breaking basic text processing.

LC_ALL=C

export LC_ALL

# make sure we are running under a compatible shell

# try to make this part work with most shells

try_exec(){

    echo "Trying shell $1"

    type "$1" > /dev/null 2>&1 && exec "$@"

}

unset foo

(: ${foo%%bar}) 2> /dev/null

E1="$?"

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

E2="$?"

if test "$E1" != 0 || test "$E2" = 0; then

    echo "Broken shell detected.  Trying alternatives."

    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 "$0" "$@"

    fi

    echo "No compatible shell script interpreter found."

    echo "This configure script requires a POSIX-compatible shell"

    echo "such as bash or ksh."

    echo "THIS IS NOT A BUG IN FFMPEG, DO NOT REPORT IT AS SUCH."

    echo "Instead, install a working POSIX-compatible shell."

    echo "Disabling this configure test will create a broken FFmpeg."

    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

    exit 1

fi

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

show_help(){

    cat <

Usage: configure [options]

Options: [defaults in brackets after descriptions]

Help options:

  --help                   print this message

  --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:

  --logfile=FILE           log tests and output to FILE [config.log]

  --disable-logging        do not log configure debug information

  --fatal-warnings         fail if any configure warning is generated

  --prefix=PREFIX          install in PREFIX [$prefix]

  --bindir=DIR             install binaries in DIR [PREFIX/bin]

  --datadir=DIR            install data files in DIR [PREFIX/share/ffmpeg]

  --docdir=DIR             install documentation in DIR [PREFIX/share/doc/ffmpeg]

  --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]

Licensing options:

  --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]

Configuration options:

  --disable-static         do not build static libraries [no]

  --enable-shared          build shared libraries [no]

  --enable-small           optimize for size instead of speed

  --disable-runtime-cpudetect disable detecting cpu capabilities at runtime (smaller binary)

  --enable-gray            enable full grayscale support (slower color)

  --disable-swscale-alpha  disable alpha channel support in swscale

  --disable-all            disable building components, libraries and programs

  --enable-incompatible-libav-abi enable incompatible Libav fork ABI [no]

  --enable-incompatible-fork-abi  enable incompatible Libav fork ABI (deprecated) [no]

Program options:

  --disable-programs       do not build command line programs

  --disable-ffmpeg         disable ffmpeg build

  --disable-ffplay         disable ffplay build

  --disable-ffprobe        disable ffprobe build

  --disable-ffserver       disable ffserver build

Documentation options:

  --disable-doc            do not build documentation

  --disable-htmlpages      do not build HTML documentation pages

  --disable-manpages       do not build man documentation pages

  --disable-podpages       do not build POD documentation pages

  --disable-txtpages       do not build text documentation pages

Component options:

  --disable-avdevice       disable libavdevice build

  --disable-avcodec        disable libavcodec build

  --disable-avformat       disable libavformat build

  --disable-avutil         disable libavutil build

  --disable-swresample     disable libswresample build

  --disable-swscale        disable libswscale build

  --disable-postproc       disable libpostproc build

  --disable-avfilter       disable libavfilter build

  --enable-avresample      enable libavresample build [no]

  --disable-pthreads       disable pthreads [auto]

  --disable-w32threads     disable Win32 threads [auto]

  --disable-os2threads     disable OS/2 threads [auto]

  --disable-network        disable network support [no]

  --disable-dct            disable DCT code

  --disable-dwt            disable DWT code

  --disable-error-resilience disable error resilience code

  --disable-lsp            disable LSP code

  --disable-lzo            disable LZO decoder code

  --disable-mdct           disable MDCT code

  --disable-rdft           disable RDFT code

  --disable-fft            disable FFT code

Hardware accelerators:

  --disable-dxva2          disable DXVA2 code [autodetect]

  --disable-vaapi          disable VAAPI code [autodetect]

  --enable-vda             enable VDA code

  --disable-vdpau          disable VDPAU code [autodetect]

Individual component options:

  --disable-everything     disable all components listed below

  --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

  --enable-indev=NAME      enable input device NAME

  --disable-indev=NAME     disable input device NAME

  --disable-indevs         disable input devices

  --enable-outdev=NAME     enable output device NAME

  --disable-outdev=NAME    disable output device NAME

  --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:

  --enable-avisynth        enable reading of AviSynth script files [no]

  --disable-bzlib          disable bzlib [autodetect]

  --enable-fontconfig      enable fontconfig

  --enable-frei0r          enable frei0r video filtering

  --enable-gnutls          enable gnutls [no]

  --disable-iconv          disable iconv [autodetect]

  --enable-ladspa          enable LADSPA audio filtering

  --enable-libaacplus      enable AAC+ encoding via libaacplus [no]

  --enable-libass          enable libass subtitles rendering [no]

  --enable-libbluray       enable BluRay reading using libbluray [no]

  --enable-libcaca         enable textual display using libcaca

  --enable-libcelt         enable CELT decoding via libcelt [no]

  --enable-libcdio         enable audio CD grabbing with libcdio

  --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394

                           and libraw1394 [no]

  --enable-libfaac         enable AAC encoding via libfaac [no]

  --enable-libfdk-aac      enable AAC de/encoding via libfdk-aac [no]

  --enable-libflite        enable flite (voice synthesis) support via libflite [no]

  --enable-libfreetype     enable libfreetype [no]

  --enable-libgme          enable Game Music Emu via libgme [no]

  --enable-libgsm          enable GSM de/encoding via libgsm [no]

  --enable-libiec61883     enable iec61883 via libiec61883 [no]

  --enable-libilbc         enable iLBC de/encoding via libilbc [no]

  --enable-libmodplug      enable ModPlug via libmodplug [no]

  --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]

  --enable-libnut          enable NUT (de)muxing via libnut,

                           native (de)muxer exists [no]

  --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]

  --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]

  --enable-libopus         enable Opus decoding via libopus [no]

  --enable-libpulse        enable Pulseaudio input via libpulse [no]

  --enable-libquvi         enable quvi input via libquvi [no]

  --enable-librtmp         enable RTMP[E] support via librtmp [no]

  --enable-libschroedinger enable Dirac de/encoding via libschroedinger [no]

  --enable-libshine        enable fixed-point MP3 encoding via libshine [no]

  --enable-libsoxr         enable Include libsoxr resampling [no]

  --enable-libspeex        enable Speex de/encoding via libspeex [no]

  --enable-libssh          enable SFTP protocol via libssh [no]

  --enable-libstagefright-h264  enable H.264 decoding via libstagefright [no]

  --enable-libtheora       enable Theora encoding via libtheora [no]

  --enable-libtwolame      enable MP2 encoding via libtwolame [no]

  --enable-libutvideo      enable Ut Video encoding and decoding via libutvideo [no]

  --enable-libv4l2         enable libv4l2/v4l-utils [no]

  --enable-libvidstab      enable video stabilization using vid.stab [no]

  --enable-libvo-aacenc    enable AAC encoding via libvo-aacenc [no]

  --enable-libvo-amrwbenc  enable AMR-WB encoding via libvo-amrwbenc [no]

  --enable-libvorbis       enable Vorbis en/decoding via libvorbis,

                           native implementation exists [no]

  --enable-libvpx          enable VP8 and VP9 de/encoding via libvpx [no]

  --enable-libwavpack      enable wavpack encoding via libwavpack [no]

  --enable-libx264         enable H.264 encoding via x264 [no]

  --enable-libxavs         enable AVS encoding via xavs [no]

  --enable-libxvid         enable Xvid encoding via xvidcore,

                           native MPEG-4/Xvid encoder exists [no]

  --enable-libzmq          enable message passing via libzmq [no]

  --enable-libzvbi         enable teletext support via libzvbi [no]

  --enable-openal          enable OpenAL 1.1 capture support [no]

  --enable-opencl          enable OpenCL code

  --enable-openssl         enable openssl [no]

  --enable-x11grab         enable X11 grabbing [no]

  --disable-zlib           disable zlib [autodetect]

Advanced options (experts only):

  --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

  --target-samples=DIR     path to samples directory on target

  --tempprefix=PATH        force fixed dir/prefix instead of mktemp for checks

  --toolchain=NAME         set tool defaults according to NAME

  --nm=NM                  use nm tool NM [$nm_default]

  --ar=AR                  use archive tool AR [$ar_default]

  --as=AS                  use assembler AS [$as_default]

  --yasmexe=EXE            use yasm-compatible assembler EXE [$yasmexe_default]

  --cc=CC                  use C compiler CC [$cc_default]

  --cxx=CXX                use C compiler CXX [$cxx_default]

  --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]

  --ld=LD                  use linker LD [$ld_default]

  --host-cc=HOSTCC         use host C compiler HOSTCC

  --host-cflags=HCFLAGS    use HCFLAGS when compiling for host

  --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host

  --host-ld=HOSTLD         use host linker HOSTLD

  --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host

  --host-libs=HLIBS        use libs HLIBS when linking for host

  --host-os=OS             compiler host OS [$target_os]

  --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]

  --extra-cxxflags=ECFLAGS add ECFLAGS to CXXFLAGS [$CXXFLAGS]

  --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]

  --extra-libs=ELIBS       add ELIBS [$ELIBS]

  --extra-version=STRING   version string suffix []

  --optflags=OPTFLAGS      override optimization-related compiler flags

  --build-suffix=SUFFIX    library name suffix []

  --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX

  --progs-suffix=SUFFIX    program name suffix []

  --arch=ARCH              select architecture [$arch]

  --cpu=CPU                select the minimum required CPU (affects

                           instruction selection, may crash on older CPUs)

  --enable-pic             build position-independent code

  --enable-sram            allow use of on-chip SRAM

  --enable-thumb           compile for Thumb instruction set

  --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

  --enable-lto             use link-time optimization

Optimization options (experts only):

  --disable-asm            disable all assembler optimizations

  --disable-altivec        disable AltiVec optimizations

  --disable-amd3dnow       disable 3DNow! optimizations

  --disable-amd3dnowext    disable 3DNow! extended optimizations

  --disable-mmx            disable MMX optimizations

  --disable-mmxext         disable MMXEXT optimizations

  --disable-sse            disable SSE optimizations

  --disable-sse2           disable SSE2 optimizations

  --disable-sse3           disable SSE3 optimizations

  --disable-ssse3          disable SSSE3 optimizations

  --disable-sse4           disable SSE4 optimizations

  --disable-sse42          disable SSE4.2 optimizations

  --disable-avx            disable AVX optimizations

  --disable-fma4           disable FMA4 optimizations

  --disable-avx2           disable AVX2 optimizations

  --disable-armv5te        disable armv5te optimizations

  --disable-armv6          disable armv6 optimizations

  --disable-armv6t2        disable armv6t2 optimizations

  --disable-vfp            disable VFP optimizations

  --disable-neon           disable NEON optimizations

  --disable-vis            disable VIS optimizations

  --disable-inline-asm     disable use of inline assembler

  --disable-yasm           disable use of yasm assembler

  --disable-mips32r2       disable MIPS32R2 optimizations

  --disable-mipsdspr1      disable MIPS DSP ASE R1 optimizations

  --disable-mipsdspr2      disable MIPS DSP ASE R2 optimizations

  --disable-mipsfpu        disable floating point MIPS optimizations

  --disable-fast-unaligned consider unaligned accesses slow

Developer options (useful when working on FFmpeg itself):

  --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

  --disable-stripping      disable stripping of executables and shared libraries

  --assert-level=level     0(default), 1 or 2, amount of assertion testing,

                           2 causes a slowdown at runtime.

  --enable-memory-poisoning fill heap uninitialized allocated space with arbitrary data

  --valgrind=VALGRIND      run "make fate" tests through valgrind to detect memory

                           leaks and errors, using the specified valgrind binary.

                           Cannot be combined with --target-exec

  --enable-ftrapv          Trap arithmetic overflows

  --samples=PATH           location of test samples for FATE, if not set use

                           \$FATE_SAMPLES at make invocation time.

  --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;

                           should be used only for debugging purposes)

  --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

NOTE: Object files are built at the place where configure is launched.

EOF

  exit 0

}

quotes='""'

log(){

    echo "$@" >> $logfile

}

log_file(){

    log BEGIN $1

    pr -n -t $1 >> $logfile

    log END $1

}

echolog(){

    log "$@"

    echo "$@"

}

warn(){

    log "WARNING: $*"

    WARNINGS="${WARNINGS}WARNING: $*\n"

}

die(){

    echolog "$@"

    cat <

If you think configure made a mistake, make sure you are using the latest

version from Git.  If the latest version fails, report the problem to the

ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.

EOF

    if disabled logging; then

        cat <

Rerun configure with logging enabled (do not use --disable-logging), and

include the log this produces with your report.

EOF

    else

        cat <

Include the log file "$logfile" produced by configure as this will help

solving the problem.

EOF

    fi

    exit 1

}

# Avoid locale weirdness, besides we really just want to translate ASCII.

toupper(){

    echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ

}

tolower(){

    echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz

}

c_escape(){

    echo "$*" | sed 's/["\\]/\\\0/g'

}

sh_quote(){

    v=$(echo "$1" | sed "s/'/'\\\\''/g")

    test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"

    echo "$v"

}

cleanws(){

    echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//;s/\r//g'

}

filter(){

    pat=$1

    shift

    for v; do

        eval "case $v in $pat) echo $v ;; esac"

    done

}

filter_out(){

    pat=$1

    shift

    for v; do

        eval "case $v in $pat) ;; *) echo $v ;; esac"

    done

}

map(){

    m=$1

    shift

    for v; do eval $m; done

}

add_suffix(){

    suffix=$1

    shift

    for v; do echo ${v}${suffix}; done

}

set_all(){

    value=$1

    shift

    for var in $*; do

        eval $var=$value

    done

}

set_weak(){

    value=$1

    shift

    for var; do

        eval : \${$var:=$value}

    done

}

sanitize_var_name(){

    echo $@ | sed 's/[^A-Za-z0-9_]/_/g'

}

set_safe(){

    var=$1

    shift

    eval $(sanitize_var_name "$var")='$*'

}

get_safe(){

    eval echo \$$(sanitize_var_name "$1")

}

pushvar(){

    for pvar in $*; do

        eval level=\${${pvar}_level:=0}

        eval ${pvar}_${level}="\$$pvar"

        eval ${pvar}_level=$(($level+1))

    done

}

popvar(){

    for pvar in $*; do

        eval level=\${${pvar}_level:-0}

        test $level = 0 && continue

        eval level=$(($level-1))

        eval $pvar="\${${pvar}_${level}}"

        eval ${pvar}_level=$level

        eval unset ${pvar}_${level}

    done

}

enable(){

    set_all yes $*

}

disable(){

    set_all no $*

}

enable_weak(){

    set_weak yes $*

}

disable_weak(){

    set_weak no $*

}

enable_safe(){

    for var; do

        enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')

    done

}

disable_safe(){

    for var; do

        disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')

    done

}

do_enable_deep(){

    for var; do

        enabled $var && continue

        eval sel="\$${var}_select"

        eval sgs="\$${var}_suggest"

        pushvar var sgs

        enable_deep $sel

        popvar sgs

        enable_deep_weak $sgs

        popvar var

    done

}

enable_deep(){

    do_enable_deep $*

    enable $*

}

enable_deep_weak(){

    for var; do

        disabled $var && continue

        pushvar var

        do_enable_deep $var

        popvar var

        enable_weak $var

    done

}

enabled(){

    test "${1#!}" = "$1" && op== || op=!=

    eval test "x\$${1#!}" $op "xyes"

}

disabled(){

    test "${1#!}" = "$1" && op== || op=!=

    eval test "x\$${1#!}" $op "xno"

}

enabled_all(){

    for opt; do

        enabled $opt || return 1

    done

}

disabled_all(){

    for opt; do

        disabled $opt || return 1

    done

}

enabled_any(){

    for opt; do

        enabled $opt && return 0

    done

}

disabled_any(){

    for opt; do

        disabled $opt && return 0

    done

    return 1

}

set_default(){

    for opt; do

        eval : \${$opt:=\$${opt}_default}

    done

}

is_in(){

    value=$1

    shift

    for var in $*; do

        [ $var = $value ] && return 0

    done

    return 1

}

do_check_deps(){

    for cfg; do

        cfg="${cfg#!}"

        enabled ${cfg}_checking && die "Circular dependency for $cfg."

        disabled ${cfg}_checking && continue

        enable ${cfg}_checking

        append allopts $cfg

        eval dep_all="\$${cfg}_deps"

        eval dep_any="\$${cfg}_deps_any"

        eval dep_sel="\$${cfg}_select"

        eval dep_sgs="\$${cfg}_suggest"

        eval dep_ifa="\$${cfg}_if"

        eval dep_ifn="\$${cfg}_if_any"

        pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn

        do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn

        popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn

        [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }

        [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }

        enabled_all  $dep_all || disable $cfg

        enabled_any  $dep_any || disable $cfg

        disabled_any $dep_sel && disable $cfg

        if enabled $cfg; then

            enable_deep $dep_sel

            enable_deep_weak $dep_sgs

        fi

        disable ${cfg}_checking

    done

}

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

}

print_config(){

    pfx=$1

    files=$2

    shift 2

    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\$/) {

                    n = -v ? \"\" : \"!\";

                    printf(\"%s%s=yes\\n\", n, c) >>file;

                } else if (file ~ /\\.texi\$/) {

                    pre = -v ? \"\" : \"@c \";

                    yesno = \$2;

                    c2 = tolower(c);

                    gsub(/_/, \"-\", c2);

                    printf(\"%s@set %s %s\\n\", pre, c2, yesno) >>file;

                }

            }

        }"

}

print_enabled(){

    suf=$1

    shift

    for v; do

        enabled $v && printf "%s\n" ${v%$suf};

    done

}

append(){

    var=$1

    shift

    eval "$var=\"\$$var $*\""

}

prepend(){

    var=$1

    shift

    eval "$var=\"$* \$$var\""

}

add_cppflags(){

    append CPPFLAGS "$@"

}

add_cflags(){

    append CFLAGS $($cflags_filter "$@")

}

add_cxxflags(){

    append CXXFLAGS $($cflags_filter "$@")

}

add_asflags(){

    append ASFLAGS $($asflags_filter "$@")

}

add_ldflags(){

    append LDFLAGS $($ldflags_filter "$@")

}

add_extralibs(){

    prepend extralibs $($ldflags_filter "$@")

}

add_host_cppflags(){

    append host_cppflags "$@"

}

add_host_cflags(){

    append host_cflags $($host_cflags_filter "$@")

}

add_host_ldflags(){

    append host_ldflags $($host_ldflags_filter "$@")

}

add_compat(){

    append compat_objs $1

    shift

    map 'add_cppflags -D$v' "$@"

}

check_cmd(){

    log "$@"

    "$@" >> $logfile 2>&1

}

cc_o(){

    eval printf '%s\\n' $CC_O

}

cc_e(){

    eval printf '%s\\n' $CC_E

}

check_cc(){

    log check_cc "$@"

    cat > $TMPC

    log_file $TMPC

    check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC

}

check_cxx(){

    log check_cxx "$@"

    cat > $TMPCPP

    log_file $TMPCPP

    check_cmd $cxx $CPPFLAGS $CFLAGS $CXXFLAGS "$@" $CXX_C -o $TMPO $TMPCPP

}

check_cpp(){

    log check_cpp "$@"

    cat > $TMPC

    log_file $TMPC

    check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC

}

as_o(){

    eval printf '%s\\n' $AS_O

}

check_as(){

    log check_as "$@"

    cat > $TMPS

    log_file $TMPS

    check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS

}

check_inline_asm(){

    log check_inline_asm "$@"

    name="$1"

    code="$2"

    shift 2

    disable $name

    check_cc "$@" <

void foo(void){ __asm__ volatile($code); }

EOF

}

check_insn(){

    log check_insn "$@"

    check_inline_asm ${1}_inline "\"$2\""

    echo "$2" | check_as && enable ${1}_external || disable ${1}_external

}

check_yasm(){

    log check_yasm "$@"

    echo "$1" > $TMPS

    log_file $TMPS

    shift 1

    check_cmd $yasmexe $YASMFLAGS -Werror "$@" -o $TMPO $TMPS

}

ld_o(){

    eval printf '%s\\n' $LD_O

}

check_ld(){

    log check_ld "$@"

    type=$1

    shift 1

    flags=$(filter_out '-l*|*.so' $@)

    libs=$(filter '-l*|*.so' $@)

    check_$type $($cflags_filter $flags) || return

    flags=$($ldflags_filter $flags)

    libs=$($ldflags_filter $libs)

    check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs

}

check_code(){

    log check_code "$@"

    check=$1

    headers=$2

    code=$3

    shift 3

    {

        for hdr in $headers; do

            echo "#include <$hdr>"

        done

        echo "int main(void) { $code; return 0; }"

    } | check_$check "$@"

}

check_cppflags(){

    log check_cppflags "$@"

    check_cc "$@" <

int x;

EOF

}

check_cflags(){

    log check_cflags "$@"

    set -- $($cflags_filter "$@")

    check_cc "$@" <

int x;

EOF

}

check_cxxflags(){

    log check_cxxflags "$@"

    set -- $($cflags_filter "$@")

    check_cxx "$@" <

int x;

EOF

}

test_ldflags(){

    log test_ldflags "$@"

    check_ld "cc" "$@" <

int main(void){ return 0; }

EOF

}

check_ldflags(){

    log check_ldflags "$@"

    test_ldflags "$@" && add_ldflags "$@"

}

check_header(){

    log check_header "$@"

    header=$1

    shift

    disable_safe $header

    check_cpp "$@" <

#include <$header>

int x;

EOF

}

check_func(){

    log check_func "$@"

    func=$1

    shift

    disable $func

    check_ld "cc" "$@" <

extern int $func();

int main(void){ $func(); }

EOF

}

check_mathfunc(){

    log check_mathfunc "$@"

    func=$1

    narg=$2

    shift 2

    test $narg = 2 && args="f, g" || args="f"

    disable $func

    check_ld "cc" "$@" <

#include 

float foo(float f, float g) { return $func($args); }

int main(void){ return (int) foo; }

EOF

}

check_func_headers(){

    log check_func_headers "$@"

    headers=$1

    funcs=$2

    shift 2

    {

        for hdr in $headers; do

            echo "#include <$hdr>"

        done

        for func in $funcs; do

            echo "long check_$func(void) { return (long) $func; }"

        done

        echo "int main(void) { return 0; }"

    } | check_ld "cc" "$@" && enable $funcs && enable_safe $headers

}

check_class_headers_cpp(){

    log check_class_headers_cpp "$@"

    headers=$1

    classes=$2

    shift 2

    {

        for hdr in $headers; do

            echo "#include <$hdr>"

        done

        echo "int main(void) { "

        i=1

        for class in $classes; do

            echo "$class obj$i;"

            i=$(expr $i + 1)

        done

        echo "return 0; }"

    } | check_ld "cxx" "$@" && enable $funcs && enable_safe $headers

}

check_cpp_condition(){

    log check_cpp_condition "$@"

    header=$1

    condition=$2

    shift 2

    check_cpp "$@" <

#include <$header>

#if !($condition)

#error "unsatisfied condition: $condition"

#endif

EOF

}

check_lib(){

    log check_lib "$@"

    header="$1"

    func="$2"

    shift 2

    check_header $header && check_func $func "$@" && add_extralibs "$@"

}

check_lib2(){

    log check_lib2 "$@"

    headers="$1"

    funcs="$2"

    shift 2

    check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"

}

check_lib_cpp(){

    log check_lib_cpp "$@"

    headers="$1"

    classes="$2"

    shift 2

    check_class_headers_cpp "$headers" "$classes" "$@" && add_extralibs "$@"

}

check_pkg_config(){

    log check_pkg_config "$@"

    pkg="$1"

    headers="$2"

    funcs="$3"

    shift 3

    check_cmd $pkg_config --exists --print-errors $pkg || return

    pkg_cflags=$($pkg_config --cflags $pkg)

    pkg_libs=$($pkg_config --libs $pkg)

    check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&

        set_safe ${pkg}_cflags $pkg_cflags   &&

        set_safe ${pkg}_libs   $pkg_libs

}

check_exec(){

    check_ld "cc" "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }

}

check_exec_crash(){

    code=$(cat)

    # 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.

    (check_exec "$@") >> $logfile 2>&1 <

#include 

static void sighandler(int sig){

    raise(SIGTERM);

}

int foo(void){

    $code

}

int (*func_ptr)(void) = foo;

int main(void){

    signal(SIGILL, sighandler);

    signal(SIGFPE, sighandler);

    signal(SIGSEGV, sighandler);

#ifdef SIGBUS

    signal(SIGBUS, sighandler);

#endif

    return func_ptr();

}

EOF

}

check_type(){

    log check_type "$@"

    headers=$1

    type=$2

    shift 2

    disable_safe "$type"

    check_code cc "$headers" "$type v" "$@" && enable_safe "$type"

}

check_struct(){

    log check_struct "$@"

    headers=$1

    struct=$2

    member=$3

    shift 3

    disable_safe "${struct}_${member}"

    check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&

        enable_safe "${struct}_${member}"

}

check_builtin(){

    log check_builtin "$@"

    name=$1

    headers=$2

    builtin=$3

    shift 3

    disable "$name"

    check_code ld "$headers" "$builtin" "cc" "$@" && enable "$name"

}

require(){

    name="$1"

    header="$2"

    func="$3"

    shift 3

    check_lib $header $func "$@" || die "ERROR: $name not found"

}

require2(){

    name="$1"

    headers="$2"

    func="$3"

    shift 3

    check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"

}

require_cpp(){

    name="$1"

    headers="$2"

    classes="$3"

    shift 3

    check_lib_cpp "$headers" "$classes" "$@" || die "ERROR: $name not found"

}

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)

}

hostcc_o(){

    eval printf '%s\\n' $HOSTCC_O

}

check_host_cc(){

    log check_host_cc "$@"

    cat > $TMPC

    log_file $TMPC

    check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC

}

check_host_cppflags(){

    log check_host_cppflags "$@"

    check_host_cc "$@" <

int x;

EOF

}

check_host_cflags(){

    log check_host_cflags "$@"

    set -- $($host_cflags_filter "$@")

    check_host_cc "$@" <

int x;