Support arm64 (Apple Silicon)

[tsbehlman]

Treating the arm64 architecture as 64-bit appears to be enough to compile successfully on an M1 Pro, and likely the rest of the current Apple Silicon-based chips.

[m4dEngi]

I know that project is already a mess and i'm considering reorganizing and migrating it to cmake, but still... maybe you can make it at least a little bit more specific about apple/osx instead of using linux build dirs and generic aarch64?

[tsbehlman]

I know that project is already a mess and i'm considering reorganizing and migrating it to cmake, but still... maybe you can make it at least a little bit more specific about apple/osx instead of using linux build dirs and generic aarch64?

Sure thing, sorry for the late reply! I've updated the PR with these changes, let me know how you feel about them.

It might make more sense to generate the platform directories as $(UNAME)-$(UNAME_M) instead of including them in the git repository but I decided to follow the existing pattern for now. I can try making that change if you prefer.

[Ciel1996]

Hey I just found this nice repo and this issue and it's PR. Is it stable or still in progress? :)

Or can one assume that the branch can be used to remote play together?

Thanks