# Linux for Mecha Comet

This guide helps you build the Linux kernel for **Mecha Comet** using cross-compilation for **ARM64**.


## 1. Set Up Cross-Compilation

Install the ARM64 toolchain and set up environment variables.

```bash
sudo apt install gcc-aarch64-linux-gnu
export ARCH=arm64
export CROSS_COMPILE=/usr/bin/aarch64-linux-gnu-
````

* `gcc-aarch64-linux-gnu`: ARM64 toolchain.
* `ARCH=arm64`: Target architecture.
* `CROSS_COMPILE`: Path to the ARM64 tools.


## 2. Build the Kernel

Prepare the config and build the kernel.

add mwifiex (wifi module) driver

```bash
cd drivers/staging
git clone https://github.com/nxp-imx/mwifiex
cd ../..
```

build kernel

```bash
cp arch/arm64/configs/mecha_v8_defconfig .config
make menuconfig
make
```

* `mecha_v8_defconfig`: Default config for Mecha Comet.
* `make menuconfig`: Customize the kernel (optional).
* `make`: Build the kernel.


## 3. Create RPM Package

Package the kernel into an RPM file.

```bash
make KBUILD_IMAGE=arch/arm64/boot/Image binrpm-pkg
```

* `KBUILD_IMAGE`: Specifies the kernel image.
* `binrpm-pkg`: Builds the RPM package.


### Notes

* Ensure all dependencies are installed.
* Run commands from the kernel source directory.