how to set up cmake and c++ on lazyvim?

[loginAsOne]

I am trying to learn c++ and c with cmake. I tried to set up lazyvim to work like c++/ cmake ide.
Only thing I added is clangd and cmake from the extras.

However, it is not recognizing library from other folders.

If I build with cmake, it actually work.

below screen shot is showing me it can't recognize header files from other location that I specified on cmake

[loginAsOne]

It was the CMakeLists.txt missing part.