KDevelop

KDevelop is a free, open source IDE for all desktop platforms.

Importing the project

From the KDevelop's main screen select Open Project.

KDevelop's main screen.

Navigate to the Redot root folder and select it.
On the next screen, choose Custom Build System for the Project Manager.

After the project has been imported, open the project configuration by right-clicking on it in the Projects panel and selecting Open Configuration.. option.

Under Language Support open the Includes/Imports tab and add the following paths:

.  // A dot, to indicate the root of the Redot project
core/
core/os/
core/math/
drivers/
platform/<your_platform>/  // Replace <your_platform> with a folder
                              corresponding to your current platform

Apply the changes.
Under Custom Build System add a new build configuration with the following settings:

Build Directory	blank
Enable	True
Executable	scons
Arguments	See Introduction To The Buildsystem for a full list of arguments.

Apply the changes and close the configuration window.

Debugging the project

Select Run > Configure Launches... from the top menu.

Click Add to create a new launch configuration.
Select Executable option and specify the path to your executable located in the <Redot root directory>/bin folder. The name depends on your build configuration, e.g. Redot.linuxbsd.editor.dev.x86_64 for 64-bit LinuxBSD platform with platform=editor and dev_build=yes.

If you run into any issues, ask for help in the Redot discord server.