make_kernel.sh

if [ $# != 2 ]
then
    #echo
    #echo IMPORTANT!!  IF THIS IS YOUR FIRST TIME COMPILING A KERNEL, DO NOT USE THIS SCRIPT.
    #echo look around, search and try doing it yourself!
    #echo
    echo Usage:
    echo -e \\\tmake_kernel \<compiler prefix\> \< url of tar archive of the linux kernel \>
else
    which $1gcc &> /dev/null
    if [ $? != 0 ]
    then
        echo incorrect compiler prefix
    else
        echo $(tput setaf 6)Script for version 4.4.X$(tput sgr 0)
        echo -n $(tput setaf 6)downloading kernel$(tput sgr 0)\ \
        wget $2 -q -O /tmp/kern.tar.xz
        if [ $? != 0 ]
        then
            echo $(tput setaf 6)failed $(tput sgr 0)
            echo Incorrect link
        else
            NAME=`tar -tf /tmp/kern.tar.xz  | head -n 1`
            echo
            echo -n $(tput setaf 6)extracting kernel\ \ $(tput sgr 0)
            cont=1
            if [ -d $NAME ]
            then
                echo -n $(tput setaf 6)Dir exists.Delete directory ? \(y\/n\)+enter\ $(tput sgr 0)
                read ans
                if [ "$ans" == "y" ]
                then
                    rm -r $NAME
                    if [ $? != 0 ]
                    then
                        echo $(tput setaf 6)failed$(tput sgr 0)
                        cont=0
                    fi
                else
                    cont=0
                fi
            fi
            if [ $cont == 1 ]
            then
                tar xf /tmp/kern.tar.xz
                if [ $? != 0 ]
                then
                    echo -n $(tput setaf 6)fail$(tput sgr 0)
                else
                    echo
                    #rm /tmp/kern.tar.xz
                    echo -n $(tput setaf 6)getting patches from openwrt github repo\ \ $(tput sgr 0)
                    CONT=1
                    if [ -d openwrt-pxa-target ]
                    then
                        echo -n $(tput setaf 6)Repo exists.Delete directory ? \(y\/n\)+enter\ $(tput sgr 0)
                        read ans
                        if [ "$ans" == "y" ]
                        then
                            rm -r openwrt-pxa-target
                            if [ $? != 0 ]
                            then
                                echo $(tput setaf 6)failed$(tput sgr 0)
                                cont=0
                            fi
                        else
                            cont=0
                        fi
                    fi
                    if [ $CONT == 1 ]
                    then
                        git clone https://github.com/openwrt-zipit/openwrt-pxa-target &> /dev/null
                        if [ $? != 0 ]
                        then
                            echo $(tput setaf 6)fail$(tput sgr 0)
                        else
                            echo
                            echo $(tput setaf 6)Patching the kernel$(tput sgr 0)
                            cd $NAME
                            OK=1
                            for f in ../openwrt-pxa-target/pxa/patches-4.4/*
                            do
                                if [ $OK == 1 ]
                                then
                                    patch -p1 < "${f}"
                                fi
                                if [ $? != 0 ]
                                then
                                    OK=0
                                fi
                            done
                            if [ $OK == 1 ]
                            then
                                echo $(tput setaf 6)getting config for 4.4 from mozzwald\'s website$(tput sgr 0)
                                curl https://mozzwald.com/zipit/kernel/config.4.4 > .config
                                if [ $? != 0 ]
                                then
                                    echo $(tput setaf 6)fail$(tput sgr 0)
                                else
                                    echo $(tput setaf 6)compiling the kernel$(tput sgr 0)
                                    mkdir ../kernel
                                    cont=1
                                    if [ $? != 0 ]
                                    then
                                        if [ -d ../kenrel ]
                                        then
                                            echo -n $(tput setaf 6)Folder ../kernel exists\(Used for output\).Delete directory ? \(y\/n\)+enter\ $(tput sgr 0)
                                            read ans
                                            if [ "$ans" == "y" ]
                                            then
                                                rm -r ../kernel
                                                if [ $? != 0 ]
                                                then
                                                    echo $(tput setaf 6)failed$(tput sgr 0)
                                                    cont=0
                                                fi
                                            else
                                                cont=0
                                            fi
                                        else
                                            echo $(tput setaf 6)error$(tput sgr 0)
                                            cont=0
                                        fi
                                    fi
                                    if [ $cont == 1 ]
                                    then
                                        echo $(tput setaf 6)run make menuconfig before building kernel? \(y\/n\)$(tput sgr 0)
                                        read ans
                                        while [ $ans == "y" ]
                                        do
                                            make ARCH=arm CROSS_COMPILE=$1 INSTALL_MOD_PATH=../kernel/ menuconfig
                                            if [ $? != 0 ]
                                            then
                                                echo -n $(tput setaf 6)Something went wrong. Try again? \(y\/n\)$(tput sgr 0)
                                                read ans
                                            else
                                                ans="ok, we can move on"
                                            fi
                                        done
                                        make ARCH=arm CROSS_COMPILE=$1 INSTALL_MOD_PATH=../kernel/ zImage modules dtbs modules_install
                                        if [ $? != 0 ]
                                        then
                                            echo $(tput setaf 6)Error compiling kernel$(tput sgr 0)
                                        else
                                            cat arch/arm/boot/zImage arch/arm/boot/dts/zipit-z2.dtb >zImage-dtb
                                            mkimage -A Arm -O linux \
                                                -C none \
                                                -T kernel \
                                                -a 0xA0008000 -e 0xA0008000 \
                                                -n uImage -d zImage-dtb uImage
                                            mkdir ../kernel/boot
                                            cp uImage ../kernel/boot
                                            cd ..
                                        fi
                                    fi
                                fi
                            fi
                        fi
                    fi
                fi
            fi
        fi
    fi
fi