gcc compiler advice?

Hi,

Where is the best place to post questions about compiling and using a C package with the gcc compiler?

I am trying to make use of https://github.com/F6HQZ/rotary-enco...r-raspberry-pi but am baffled by error messages that I get at compile time.

Suggestions for a good resource forum for such things?

Thanks,

Brian H.
Uxbridge Ont