EDKII UEFI Firmware | Building EDKII UEFI firmware for Arm Platforms

Set up the development environment

This section of the guide shows you how to set up the environment on either a Linux or Windows development PC before starting to build EDKII firmware.

We use the following source repositories in this guide:

Project	Repository	Repository URL	Description;
Tianocore	tianocore\edk2	https://github.com/tianocore/edk2.git	The `edk2` repository contains the firmware development environment and required packages for building the UEFI firmware.
Tianocore	tianocore\edk2-platforms	https://github.com/tianocore/edk2-platforms.git	The `edk2`-platforms repository contains the platform workspace and associated modules.
ACPICA	acpica\acpica	https://github.com/acpica/acpica.git	The Advanced Configuration and Power Interface (ACPI) Component Architecture (ACPICA) tools provide an open-source implementation of the iASL compiler.

The following steps show you how to set up your development environment:

Launch a terminal window and create a workspace folder on your development PC called source. Set the WORKSPACE environment variable to point to this folder.
This can be seen in the following code:
In a Linux bash shell:
```
cd <directory where you want to work>
mkdir source
cd source
export WORKSPACE=$PWD
```
In a Windows command prompt:
```
cd <directory where you want to work>
mkdir source
cd source
set WORKSPACE=%CD%
```

Clone the source code repositories. In the terminal window, change directory to your workspace (source) folder and run the following commands:

git clone https://github.com/tianocore/edk2-platforms.git
git clone https://github.com/acpica/acpica.git
git clone https://github.com/tianocore/edk2.git

Go to the edk2 folder and update the submodules:
```
cd edk2
git submodule update --init
cd ..
```

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