• https://www.raspberrypi.com/documentation/computers/linux_kernel.html

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cross compile Toolchain download

• prerequisite

$ sudo apt install git bc bison flex libssl-dev make libc6-dev libncurses5-dev

• install 32-bit Toolchain for a 32-bit Kernel

$ sudo apt install crossbuild-essential-armhf

• install 64-bit Toolchain for a 64-bit Kernel

$ sudo apt install crossbuild-essential-arm64

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Kernel Source

$ git clone https://github.com/raspberrypi/linux

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config

• 32bit rpi3

$ cd linux
$ KERNEL=kernel7
$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- bcm2709_defconfig

• 32bit rpi4

$ cd linux
$ KERNEL=kernel7l
$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- bcm2711_defconfig

• 64bit rpi3,4

$ cd linux
$ KERNEL=kernel8
$ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- bcm2711_defconfig

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build

• for all 32-bit build

$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- zImage modules dtbs

• for all 64-bit build

$ make ARCH=64 CROSS_COMPILE=aarch64-linux-gnu- Image modules dtbs

결과

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Install onto SD Card

1. SD카드 fdisk
2. 파일시스템
3. 마운트