How to compile a port with clang?

[Mojca Miklavec]

Hello,

I would like to try to compile fontforge with clang compiler (since
the default one doesn't work). What exactly should I do?

I was playing with portconfigure.tcl, but I'm not sure that I didn't
mess up something (I don't know what exactly I have to change and I
also didn't see any clang++ mention in that file).

Or do I have to recompile macports?

Thank you,
   Mojca