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=== Installation ===
{{Warningbox|Some versions of the Arm GCC compiler appear to produce firmware that do not work. Known working versions include Windows/2018-q2 and Linux/5.4.1 20160919. Versions known not to work include Windows/2018-q1, Windows/2018-q4}}
To be able to build firmware for ARM Targets, you'll need to install the GNU Toolchain for ARM Devices. An installer for Windows and archives for Linux/Windows
can be found [https://developer.arm.com/open-source/gnu-toolchain/gnu-rm/downloads here]. If you use the installer, make sure the "Add path to environment variable", "Add registry information", and "Launch gccvar.bat" boxes are ticked. If you're using an a Linux based operating system (like the VM), you can install the toolchain via your package manager. For example, in the VM run <code>sudo apt-get install gcc-arm-none-eabi</code> in a terminal:. Once you've done this, open a terminal and type <code>arm-none-eabi-gcc</code>. If this fails, you'll need to add the toolchain to your path.