library source file

[Artin-GH]

What does libs/A/src/A.cpp or libs/B/src/B.cpp do?

[pOmelchenko]

This is example files, but in your project it can be an external library which you use in your project.

more info you can find in that article https://medium.com/swlh/c-project-structure-for-cmake-67d60135f6f5