Haha, that'll learn me. I just updated to the latest version 4.19 and now my project doesn't compile due to some error:
/usr/bin/sh: -Wall: command not found
I would think it is a problem with the WINAVR plug in but I do not know enough to fix this.
Even starting a new project causes a similar compile error, I have reinstalled winavr which makes no difference.
Does anyone have a solution?