Simple solution for a new project: includes are recognized in Eclipse only after first build as mentioned in the tutorial: Note: You will see a lot of unresolved inclusion errors in the editor and those will be resolved only after the build. However, Eclipse still not works for me, as expected. I wi...

followed the introduction till Create a new Project using Eclipse IDE for C/C++ Developers, Version: 2020-03 (4.15.0), Build id: 20200313-1211 on Debian Stretch . A main.c is created, but Eclipse can't find any include file. Searching the web how to tell CDT-Eclipse where to find include files faile...