I'm using avr-libc 1.8.0 (release 7.fc20) and i've noticed that
iom128rfr2.h provides only one type of pin definition whilst
iom128rfa1.h and others use a dual definition of pins (P##, and PORT##).
It seems that this may have come from the Atmel patch:
avr-libc upstream provides iom128rfr2.h with both definitions:
I encountered this when building simavr:
Is this intended or should I file it as a bug?