Current best practice to select GCC compiler in Portfile

[Artur Szostak]

Hi,

I couldnt really find this information and I see lots of different approaches in the Portfiles.
What is the current best practice to select the GCC compiler over the XCode clang one used by default?
I dont care much about the exact version of the GCC compiler used, but it must be gcc rather than clang.

Kind regards.

Artur