Summary of https://gnu-mcu-eclipse.github.io/install/ below:
npm install xpm --global
This installs xpm package manager executable
xpm install @gnu-mcu-eclipse/openocd --global
to install Gnu MC Eclipse openOCD
Install PAckages CMSIS
Set active project, check MCU set correctly
Check for updates
Using Git with GNU-MCU-Eclipse
Option: Github Desktop
- 
- 
-  Optional: create local branch of cloned repo for tests  
-  In Eclipse, create new workspace pointing to local clone of cloned Github UHSDR repository  
-  Check Eclipse settings for  - 
-  active build config  
-  MCU device used * …  
 
 
Option: git commandline
Import git UHSDR project into Eclipse installation
-  In Eclipse, choose “File→Import”.  
-  .. then choose “General→Existing Projects into Workspace”.  
-  Then choose the folder “mchf-eclipse in the path where you just downloaded the zip file as “root-directory”  
-  The project is now recognized and can be imported * Next: check Eclipse settings