So COMPILER changed again, hopefully for the last time. It's now definitely a list that's somewhat more specific base-gcc base-clang gcc3 (for really old stuff ports-gcc ports-clang
'gcc' and 'clang' are currently shortcuts so that the existing stuff doesn't change too much. this went thru a bulk. And is documented in bsd.port.mk(5) mostly because people whined they didn't understand things. Hopefully this will make sense for everyone. This is needed for limber stuff like gcc-only, which didn't make enough sense... COMPILER=base-gcc gcc3 ports-gcc (for stuff that's happy with any gcc) vs. COMPILER=ports-gcc (for stuff that really wants the gcc 4.9 from ports)
