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#!/bin/sh
# mmap-win32 configure script
#
# Parts copied from FFmpeg's configure
#

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

enable(){
    set_all yes $*
}

disable(){
    set_all no $*
}

enabled(){
    eval test "x\$$1" = "xyes"
}

disabled(){
    eval test "x\$$1" = "xno"
}

show_help(){
  echo "Usage: configure [options]"
  echo "Options: [defaults in brackets after descriptions]"
  echo "All \"enable\" options have \"disable\" counterparts"
  echo
  echo "  --help                    print this message"
  echo "  --prefix=PREFIX           install in PREFIX [$PREFIX]"
  echo "  --bindir=DIR              install binaries in DIR [$PREFIX/bin]"
  echo "  --libdir=DIR              install libs in DIR [$PREFIX/lib]"
  echo "  --incdir=DIR              install includes in DIR [$PREFIX/include]"
  echo "  --enable-static           build static libraries [yes]"
  echo "  --enable-shared           build shared libraries [no]"
  echo "  --enable-msvc             create msvc-compatible import lib [auto]"
  echo
  echo "  --cc=CC                   use C compiler CC [$cc_default]"
  echo "  --cross-prefix=PREFIX     use PREFIX for compilation tools [$cross_prefix]"
  exit 1
}

die_unknown(){
    echo "Unknown option \"$1\"."
    echo "See $0 --help for available options."
    exit 1
}

PREFIX="/mingw"
ar="ar"
cc_default="gcc"
ranlib="ranlib"
strip="strip"

DEFAULT="msvc
"

DEFAULT_YES="static
    stripping
"

DEFAULT_NO="shared
"

CMDLINE_SELECT="$DEFAULT
    $DEFAULT_NO
    $DEFAULT_YES
"

enable  $DEFAULT_YES
disable $DEFAULT_NO

for opt do
    optval="${opt#*=}"
    case "$opt" in
    --help)
        show_help
    ;;
    --prefix=*)
        PREFIX="$optval"
    ;;
    --bindir=*)
        bindir="$optval"
    ;;
    --libdir=*)
        libdir="$optval"
    ;;
    --incdir=*)
        incdir="$optval"
    ;;
    --cc=*)
        cc="$optval"
    ;;
    --cross-prefix=*)
        cross_prefix="$optval"
    ;;
    --enable-?*|--disable-?*)
        eval `echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g'`
        echo "$CMDLINE_SELECT" | grep -q "^ *$option\$" || die_unknown $opt
        $action $option
    ;;
    *)
        die_unknown $opt
    ;;
    esac
done

bindir="${PREFIX}/bin"
libdir="${PREFIX}/lib"
incdir="${PREFIX}/include/sys"
ar="${cross_prefix}${ar}"
cc_default="${cross_prefix}${cc_default}"
ranlib="${cross_prefix}${ranlib}"
strip="${cross_prefix}${strip}"

if ! test -z $cc; then
    cc_default="${cc}"
fi
cc="${cc_default}"

disabled static && disabled shared && {
    echo "At least one library type must be set.";
    exit 1;
}

if enabled msvc; then
    lib /? > /dev/null 2>&1 /dev/null || {
        echo "MSVC's lib command not found."
        echo "Make sure MSVC is installed and its bin folder is in your \$PATH."
        exit 1
    }
fi

if ! enabled stripping; then
    strip="echo ignoring strip"
fi

enabled msvc && libcmd="lib" || libcmd="echo ignoring lib"

echo "# Automatically generated by configure" > config.mak
echo "PREFIX=$PREFIX" >> config.mak
echo "bindir=$bindir" >> config.mak
echo "libdir=$libdir" >> config.mak
echo "incdir=$incdir" >> config.mak
echo "AR=$ar" >> config.mak
echo "CC=$cc" >> config.mak
echo "RANLIB=$ranlib" >> config.mak
echo "STRIP=$strip" >> config.mak
echo "BUILD_STATIC=$static" >> config.mak
echo "BUILD_SHARED=$shared" >> config.mak
echo "BUILD_MSVC=$msvc" >> config.mak
echo "LIBCMD=$libcmd" >> config.mak

echo "prefix: $PREFIX"
echo "bindir: $bindir"
echo "libdir: $libdir"
echo "incdir: $incdir"
echo "ar:     $ar"
echo "cc:     $cc"
echo "ranlib: $ranlib"
echo "strip:  $strip"
echo "static: $static"
echo "shared: $shared"