configure

#!/bin/bash

usage() {
    cat <<EOF
configure options:

    --help                      Show this help and exit
    --prefix                    [/] Prefix path for installation of kernel and user components
    --kdir                      Path to the kernel directory to use for out-of-tree module compilation
    --nodriver                  Don't build the guest kernel driver
    --noproxy                   Don't build proxy code
    --netmap			Build the proxy backend with netmap support
EOF
}

# Default parameter values
INSTALL_PREFIX="/"
KERNBUILDDIR="/lib/modules/`uname -r`/build"
BUILD_DRIVER="y"
BUILD_PROXY="y"
KER_INSTALL_DEPS="ker"
NETMAP="n"

# Option parsing
while [[ $# > 0 ]]
do
    key="$1"
    case $key in
        "-h")
            usage
            exit 0
        ;;

        "--help")
            usage
            exit 0
        ;;

        "--prefix")
        if [ -n "$2" ]; then
            INSTALL_PREFIX=$2
            shift
        else
            echo "--prefix requires a path argument"
            exit 255
        fi
        ;;

        "--kdir")
        if [ -n "$2" ]; then
            KERNBUILDDIR=$2
            shift
        else
            echo "--kdir requires a path argument"
            exit 255
        fi
        ;;

        "--nodriver")
        BUILD_DRIVER="n"
        ;;

        "--noproxy")
        BUILD_PROXY="n"
        ;;

        "--netmap")
        NETMAP="y"
        ;;

        *)
        echo "Unknown option '$key'"
        echo "Try ./configure --help"
        exit 255
        ;;
    esac
    shift
done

SRCDIR=$(dirname $(realpath $0))
cp $SRCDIR/Makefile.in $SRCDIR/Makefile
sed -i "s|@SRCDIR@|$SRCDIR|g" $SRCDIR/Makefile
sed -i "s|@NETMAP@|$NETMAP|g" $SRCDIR/Makefile
sed -i "s|@PROXY@|${BUILD_PROXY}|g" $SRCDIR/Makefile
sed -i "s|@DRIVER@|${BUILD_DRIVER}|g" $SRCDIR/Makefile
sed -i "s|@INSTALL_MOD_PATH@|${INSTALL_PREFIX}|g" $SRCDIR/Makefile
sed -i "s|@KERNBUILDDIR@|$KERNBUILDDIR|g" $SRCDIR/Makefile