How to build KernelSU?
First, you should read the Android Official docs for kernel build:
WARNING
This page is for GKI devices, if you use an old kernel, please refer how to integrate KernelSU for old kernel
Build Kernel
Sync the kernel source code
repo init -u https://android.googlesource.com/kernel/manifest
mv <kernel_manifest.xml> .repo/manifests
repo init -m manifest.xml
repo sync
The <kernel_manifest.xml> is a manifest file which can determine a build uniquely, you can use the manifest to do a re-preducable build. You should download the manifest file from Google GKI release builds
Build
Please check the official docs first.
For example, we need to build aarch64 kernel image:
LTO=thin BUILD_CONFIG=common/build.config.gki.aarch64 build/build.sh
Don't forget to add the LTO=thin flag, otherwise the build may fail if your computer's memory is less then 24Gb.
Starting from Android 13, the kernel is built by bazel:
tools/bazel build --config=fast //common:kernel_aarch64_dist
Build Kernel with KernelSU
If you can build the kernel successfully, then build KernelSU is so easy, run this command in Kernel source root dir:
curl -LSs "https://raw.githubusercontent.com/tiann/KernelSU/main/kernel/setup.sh" | bash -
And then rebuild the kernel and you will get a kernel image with KernelSU!