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KERNEL_TAG ?= v6.14
all: prepare-kernel build-kernel

prepare-kernel:
	rm -rf linux || true
	git clone git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git --depth 1 --branch ${KERNEL_TAG}
	cd linux && git checkout -b stable ${KERNEL_TAG}

build-kernel: build-kernel-arm64

build-kernel-arm64:
	cp linux-config-aarch64 linux/.config
	cd linux && ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- make olddefconfig && ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- make -j$$((`nproc`-1)) && cp arch/arm64/boot/Image ../kernel.arm64