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#!/bin/dash
KERNEL_VERSION=5.15.113
#KERNEL_VERSION=4.4.187
#KERNEL_VERSION=4.9.120
#KERNEL_VERSION=4.14.63
KERNEL_MAJOR_VERSION=v5.x
#KERNEL_MAJOR_VERSION=v4.x
KERNEL_PAGE=https://cdn.kernel.org
DEVICE_NAME=generic
OUT_DIRECTORY=out-arm64
#prepare
_PWD=`pwd`
mkdir -p $OUT_DIRECTORY/lib/modules
echo "Download kernel"
if [ ! -f linux-$KERNEL_VERSION.tar.xz ]; then
wget -c $KERNEL_PAGE/pub/linux/kernel/$KERNEL_MAJOR_VERSION/linux-$KERNEL_VERSION.tar.xz
fi
#echo "Unpack kernel"
#mkdir -p linux-$KERNEL_VERSION-arm64
#tar -xvf linux-$KERNEL_VERSION.tar.xz --strip-components=1 -C linux-$KERNEL_VERSION-arm64
#echo "Copy config to kernel"
#cp configs/$DEVICE_NAME/generic-$KERNEL_VERSION-arm64 ./linux-$KERNEL_VERSION-arm-arm64/.config
#echo "Compile kernel"
cd ./linux-$KERNEL_VERSION-arm64
#
#ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- make defconfig
#ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- make -j4
#make -j4
make INSTALL_MOD_PATH=$_PWD/$OUT_DIRECTORY/ modules_install
#output results
echo "Copy results to out"
cd $_PWD
cp ./linux-$KERNEL_VERSION-arm64/arch/arm64/boot/Image $_PWD/$OUT_DIRECTORY/
cp ./linux-$KERNEL_VERSION-arm64/arch/arm64/boot/Image.gz $_PWD/$OUT_DIRECTORY/
cp ./linux-$KERNEL_VERSION-arm64/vmlinux $_PWD/$OUT_DIRECTORY/vmlinux
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