SukiSU-Ultra/website/docs/guide/how-to-build.md

How to build KernelSU?

First, you should read the Android Official docs for kernel build:

1. Building Kernels
2. GKI Release Builds

::: 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!