Download & run Eclipse Installer: https://linuxh2o.com/how-to-install-eclipse-ide-on-linux-2020/
Toggle "//" on all selected lines with: Ctrl + /
Alt + Shift + R
open Marketplace and install "cmake4eclipse"
Help -> Marketplace
set Project location
new -> Project -> C++ Project
enter Project name ...
select "Executable" -> Empty Project
next -> Select Configurations (do nat change anything) -> next -> Cross GCC Command (do not change anything) -> finish
import main.cpp & CMakeList.txt to directory
Select Projekt in Project-Explorer
Project -> Preferences -> C/C++ Build -> Builder Settings -> select "Generate Makefiles automatically"
-> C/C++ Build -> Tool Chain Editor -> Current Builder -> select "CMake Builder"
C/C++ General -> Preprocessor Includes -> Check "CDT Managed Build Setting Entries [shared]" and "Move Up" to top position
select main in project explorer -> hit Build 'debug' for 'XX' project (NOT on the left hand side bit in the MIDDLE, tha hammer without Play/Stop/Textbox items)
new Binary available -> select main Binary -> hit green Play button on the left to create a run configuration
Insert "clean" Build Target to project to delete existing binaries