I'm starting to use Xcode as my IDE. I have a library (panstamp.h). that references PRR and xcode is giving me a compile error on this. I'm trying to find the Arduino library where PRR is defined, but I can't. I even downloaded the arduino master from github and used grep from terminal to search, but I still didn't find it. Anyone know what library PRR is in?
Found it: iom328p.h