# How to build the rusEFI firmware from the source files  

### The following process is a step-by-step guide to creating the build environment in windows 10+ using Windows Shell for Linux 

The best way to build the rusEFI firmware is using a set of tools that run best under linux, 


1. Install WSL 
Run the following in an elevated powershell  
Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Windows-Subsystem-Linux  

2. Download linux  
Download the appx for linux 2004 from here:   
[WSL Install Manual](https://docs.microsoft.com/en-us/windows/wsl/install-manual)  
Or type the following into powershell:  
cd ubuntu/  
Invoke-WebRequest -Uri https://aka.ms/wsl-ubuntu-2004 -OutFile Ubuntu.appx -UseBasicParsing  
This command will download the file to the currently active directory.  

3. install linux   
PS C:\Windows\system32> cd c:/Ubuntu  
PS C:\Ubuntu> Add-AppxPackage Ubuntu_2004.2020.424.0_x64.appx  
Open start menu and launch linux  
Wait for it to complete install and ask for username and password   

4. check WSL default install   
In powershell type:  
wslconfig /l  
Make sure the ubuntu 2004 is marked as default.   

5. get git  
sudo apt-get install git  

6. clone git  
git clone https://github.com/YOUR-REPOSITORY/rusefi.git  

7. Run setup script  
cd /home/owner/rusefi/firmware  
sh setup_linux_environment.sh  

8. install VScode in windows  
Download and install as normal, is should detect WSL and ask to install the extension for it, do this and close VScode  

9. Install VScode in linux  
cd /home/owner/rusefi  
code .  

10. Hit ctrl-b and run "build unit tests"   
Allow to run and complete, it may exit with "multiple targets" error, if so just run it a second time.  

11. exit both VScode and ubunu  
Click the x in VScode and type exit in ubuntu  

12. reboot ubuntu from the start menu and run make  
cd /home/owner/rusefi/firmware  
make  
This should build the firmware  

13. If successful then reopen VScode in ubuntu  
cd /home/owner/rusefi  
code .  

14. Run the built tool for the specific board in VScode  
Ctrl-Shift-B and select the chosen board, this should build the firmware.  



- Note submodules are their own thing - the main repo just contains a pointer to where the submodule should be checked out  


- Zach method: 
install wsl (already have ubuntu 20.04 on wsl2)  
sudo apt update  
sudo apt install openjdk-8-jre-headless -y  
curl -O https://armkeil.blob.core.windows.net/developer/Files/downloads/gnu-rm/9-2020q2/gcc-arm-none-eabi-9-2020-q2-update-x86_64-linux.tar.bz2  
tar -xf gcc-arm-none-eabi-9-2020-q2-update-x86_64-linux.tar.bz2  


### Without WSL
Less fancy toolchain without WSL works as well https://rusefi.com/forum/viewtopic.php?f=5&t=9