Compile on WSL with ninja

Note

ccache is default disabled because it creats issues in particular situation.
If you are aware its pros and cons and you insist enable it, following this guide: https://github.com/portapack-mayhem/mayhem-firmware/wiki/Notes-About-ccache
If you don't know what's this, just use default.

1. Update your system:

   sudo apt-get update
   sudo apt-get upgrade

2. Install dependencies:

   sudo apt-get install -y git tar wget dfu-util cmake python3 ccache bzip2 liblz4-tool curl ninja-build python3-pip

3. Install pip and pyyaml:

   curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py --break-system-packages
   sudo python3 get-pip.py
   pip install pyyaml --break-system-packages

4. Set up environment variables:

   export LANG=C.UTF-8
   export LC_ALL=C.UTF-8

5. Download and install the ARM toolchain:

   mkdir -p /opt/build
   cd /opt/build
   wget -O gcc-arm-none-eabi.tar.bz2 "https://developer.arm.com/-/media/Files/downloads/gnu-rm/9-2019q4/gcc-arm-none-eabi-9-2019-q4-major-x86_64-linux.tar.bz2?revision=108bd959-44bd-4619-9c19-26187abf5225&la=en&hash=E788CE92E5DFD64B2A8C246BBA91A249CB8E2D2D"
   sudo mkdir armbin
   sudo tar --strip=1 -xjvf gcc-arm-none-eabi.tar.bz2 -C armbin

6. Add the ARM toolchain to your PATH:

   echo 'export PATH=$PATH:/opt/build/armbin/bin' >> ~/.bashrc
   source ~/.bashrc

7. Clone the PortaPack Mayhem repository (if you haven't already):

   sudo git clone --recurse-submodules https://github.com/portapack-mayhem/mayhem-firmware.git
   cd mayhem-firmware
   sudo chmod -R 777 ~/mayhem-firmware

8. Create a build directory and run CMake:

   mkdir build
   cd build
   cmake -G Ninja ..

9. Build the firmware:

   ninja