build-kernel

#!/bin/sh
# ------------------------------------------------------------------------------
# build-kernel - Builds the ev3dev kernel.
# ------------------------------------------------------------------------------

echo
echo -------------------------------------------------------------------------------
echo BUILDING KERNEL
echo -------------------------------------------------------------------------------
echo

. ./setup-env

kernel_src_path="$AM1808_KERNEL"
obj_path="$AM1808_OBJ"
install_path="$AM1808_INSTALL"
make_args="$AM1808_MAKE_ARGS -C ${kernel_src_path} KBUILD_OUTPUT=${obj_path} \
ARCH=arm CROSS_COMPILE=$AM1808_COMPILER/$AM1808_ABI"

if [ ! -d "${obj_path}" ]
then
	echo "CREATING OBJ DIRECTORY"
	mkdir -p "${obj_path}" || exit $?
fi

if [ ! -f "${obj_path}/.config" ]
then
	echo "LOADING DEFAULT KERNEL CONFIGURATION"
	make ${make_args} defconfig KBUILD_DEFCONFIG=ev3dev_defconfig || exit $?
fi

if [ $# -eq 0 ]
then
	echo "CROSS COMPILING KERNEL"
	make ${make_args} uImage  modules|| exit $?

	if [ ! -d "${install_path}" ]
	then
		echo "CREATING OUTPUT DIRECTORY"
		mkdir -p "${install_path}" || exit $?
	fi

	echo "COPYING BOOTABLE IMAGE TO LOCAL DIRECTORY"
	cp ${obj_path}/arch/arm/boot/uImage ${install_path} || exit $?

	echo "COPYING MODULES TO LOCAL DIRECTORY"
	make ${make_args} modules_install INSTALL_MOD_PATH=${install_path}/ || exit $?
else
	echo "CROSS COMPILING KERNEL"
	make ${make_args} $@ || exit $?

	for arg in "$@"
	do
		# If cleaning, remove the files generated by this script too.
		if [ "$arg" = "clean" -o "$arg" = "mrproper" -o "$arg" = "distclean" ]
		then
			rm -rf kernel
		fi
	done
fi