Build Linux Kernel for Android Device
hahnavi
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Download the Kernel Source Code
For example, kernel for Xiaomi Mi8937
git clone https://github.com/LineageOS/android_kernel_xiaomi_msm8937.git --depth=1
Install Cross Compiler
Arch Linux
sudo pacman -S aarch64-linux-gnu-gcc
Ubuntu
sudo apt install gcc-aarch64-linux-gnu
Compile the Kernel
Export the environment variable
export CROSS_COMPILE=aarch64-linux-gnu-
export ARCH=arm64
Create the output folder
mkdir out
Locate the kernel defconfig for the device in arch/arm64/configs, run
make O=out <defconfig>
Example for my device
make O=out vendor/msm8937-perf_defconfig
Or we can copy the defconfig file from outside kernel source code and put in the out directory
cp <defconfig-file-path> out/.config
make O=out oldconfig
To modify the kernel configuration
make O=out menuconfig
Start compile process
make O=out -j`nproc`
The output file will be stored in the boot directory
out/arch/arm64/boot/