#!/bin/bash

#+--------------------------------------------------------------------------------------------
#|Description:  This shell script used download and compile dhcpd for ARM
#|     Author:  GuoWenxue <guowenxue@gmail.com>
#|  ChangeLog:
#|           1, Initialize 1.0.0 on 2011.04.12
#+--------------------------------------------------------------------------------------------

PREFIX_PATH=`pwd`/../install/bin

LYFTP_SRC=ftp://master.iot-yun.club/src/

CROSSTOOL=/opt/crosstool/cortex-a7/bin/arm-linux-gnueabi-

function msg_banner()
{
    echo ""
    echo "+-----------------------------------------------------------------------"
    echo "|  $1 "
    echo "+-----------------------------------------------------------------------"
    echo ""
}

function check_result()
{
    if [ $? != 0 ] ; then
       echo ""
       echo "+-----------------------------------------------------------------------"
       echo "|  $1 "
       echo "+-----------------------------------------------------------------------"
       echo ""
       exit ;
    fi
}

function export_cross()
{
    # export cross toolchain
    export CC=${CROSSTOOL}gcc
    export AS=${CROSSTOOL}as
    export AR=${CROSSTOOL}ar
    export LD=${CROSSTOOL}ld
    export NM=${CROSSTOOL}nm
    export RANLIB=${CROSSTOOL}ranlib
    export OBJDUMP=${CROSSTOOL}objdump
    export STRIP=${CROSSTOOL}strip

    # export cross configure 
    export CONFIG_CROSS=" --build=i686-pc-linux --host=arm-linux "

    # Clear LDFLAGS and CFLAGS
    export LDFLAGS=
    export CFLAGS=
}

function compile_dhcpd()
{
    IMG_NAME=dhcpd
    SRC_NAME=dhcp-4.0.3
    PACK_SUFIX=tar.gz

    if [ -f ${PREFIX_PATH}/${IMG_NAME} ] ; then
        return 0;
    fi

    msg_banner "Start cross compile $SRC_NAME "

    if [ ! -f ${SRC_NAME}.${PACK_SUFIX} ] ; then
        #wget ftp://ftp.isc.org/isc/dhcp/${SRC_NAME}.${PACK_SUFIX}
        wget $LYFTP_SRC/$SRC_NAME.$PACK_SUFIX
        check_result "ERROR: download ${SRC_NAME} failure"
    fi

    tar -xzf ${SRC_NAME}.${PACK_SUFIX}
    cd ${SRC_NAME}

    echo "ac_cv_file__dev_random=yes" > arm-linux.cache
    ./configure --prefix=${PREFIX_PATH} ${CONFIG_CROSS} --cache-file=arm-linux.cache -with-srv-lease-file=/tmp/dhcpd.leases \
    --with-srv-pid-file=/var/run/dhcpd.pid --with-relay-pid-file=/var/run/dhcrelay.pid
    check_result "ERROR: configure ${SRC_NAME} failure"

    make 
    check_result "ERROR: compile ${SRC_NAME} failure"

    ${STRIP} server/${IMG_NAME}
    cp server/${IMG_NAME} ${PREFIX_PATH} ../
    cp client/dhclient  ${PREFIX_PATH} ../

    cd -
}


export_cross

compile_dhcpd