Because of the following, which Coding Badly explained to me:
There are entries specifically:
Arduino Uno w/'328
Leonardo16They won't compile in 1.0.2, IDE complains about the MCU not being there. I have checked & rechecked, I created both in avrdude.conf
At this point you're barking up the wrong tree. The compiler doesn't use avrdude.conf. All of its stuff is internal. avrdude.conf will have
to have entries for the processors when you upload but adding the entries won't help when compiling.The only solution is to swap out the AVR-GCC toolset for something newer. I've posted instructions for upgrading to the latest version of
WinAVR on the forum. If you can't find one of the posts or get stuck just let me know and I'll try to help. Warning: I have no idea if the
latest version of WinAVR supports the ATMEGA16U4 or the ATMEGA328.
It only took a few minutes to do the steps needed.