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#!/bin/bash
set -e
NUM_CPUS=${NUM_CPUS:-"$(getconf _NPROCESSORS_ONLN)"}
TOP=${TOP:-$(dirname $(pwd))}
FIT_NAME="kernel kernel_dtb"
KDIR=${KDIR:-$(pwd)}
clean_build=0
ARCH=arm64
git_describe=$(git describe --long)
usage() {
echo -e "$0's help text"
echo -e " -a ARCH, specify the architecture to build, default: arm64"
echo -e " -c, cleanup output and staging dir before building, default: 0"
echo -e " -h, prints out this help"
}
while getopts "a:ch" arg; do
case $arg in
a)
ARCH="$OPTARG"
;;
c)
clean_build=1
;;
h|*)
usage
exit 0
;;
esac
done
OUTPUT=${OUTPUT:-"${TOP}/build_output/${ARCH}/${git_describe}"}
STAGING=${STAGING:-"${TOP}/staging/${ARCH}/${git_describe}"}
if [[ $(grep -c "^WHAT IS LINUX" README) -ne 1 ]]; then
echo -e "ERROR: Need to run this script $(basename $0),"
echo -e " from a kernel repository"
echo ""
usage
exit 1
fi
case $ARCH in
arm)
CROSS_COMPILE=${CROSS_COMPILE:-arm-linux-gnueabihf-}
;;
arm64)
CROSS_COMPILE=${CROSS_COMPILE:-aarch64-linux-gnu-}
;;
*)
esac
if [[ $clean_build -eq 1 ]]; then
echo "Cleaning up output and staging dir before building!"
rm -rf ${OUTPUT}
rm -rf ${STAGING}
fi
make -j ${NUM_CPUS} CROSS_COMPILE=${CROSS_COMPILE} ARCH=${ARCH} KDIR=${KDIR} O=${OUTPUT} oldconfig
make -j ${NUM_CPUS} CROSS_COMPILE=${CROSS_COMPILE} ARCH=${ARCH} KDIR=${KDIR} O=${OUTPUT}
if [[ -d arch/${ARCH}/boot/dts ]]; then
make -j ${NUM_CPUS} CROSS_COMPILE=${CROSS_COMPILE} ARCH=${ARCH} KDIR=${KDIR} O=${OUTPUT} INSTALL_DTBS_PATH=${STAGING}/dtbs dtbs_install
fi
if [[ $(grep CONFIG_MODULES=y ${OUTPUT}/.config) ]]; then
make -j ${NUM_CPUS} CROSS_COMPILE=${CROSS_COMPILE} ARCH=${ARCH} KDIR=${KDIR} O=${OUTPUT} INSTALL_MOD_PATH=${STAGING} modules_install
pushd ${STAGING}
tar -zcf modules-$(basename ${STAGING}).tar.gz lib/
popd
fi
cp -f ${OUTPUT}/.config ${STAGING}/kernel.config
if [[ ${ARCH} == arm ]]; then
make -j ${NUM_CPUS} CROSS_COMPILE=${CROSS_COMPILE} ARCH=${ARCH} KDIR=${KDIR} O=${OUTPUT} uImage
cp ${OUTPUT}/arch/arm/boot/uImage ${STAGING}/
elif [[ ${ARCH} == arm64 ]]; then
make -j ${NUM_CPUS} CROSS_COMPILE=${CROSS_COMPILE} ARCH=${ARCH} KDIR=${KDIR} O=${OUTPUT} Image
cp ${OUTPUT}/arch/arm64/boot/Image ${STAGING}/
fi
## vim: set sw=4 sts=4 et foldmethod=syntax : ##
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