Attention: this directory is excluded from Git so you can customize your local build even further without having to fork the project.
If you create the file ViciusPreCustomizeMe.h or ViciusPostCustomizeMe.h in this directory, you can override build flags and macros without having to touch the core sources.
As the names suggest; ViciusPreCustomizeMe.h is processed before the content of CustomizeMe.h and ViciusPostCustomizeMe.h is processed after reading CustomizeMe.h, allowing you to undo and overwrite the default values.