Issue
I have just installed the eclipse AVR Plugin, followed the download issues here: http://avr-eclipse.sourceforge.net
But the AVR Header files are not valid, in AVR Path settings:
Where can I find these Paths? (runs on Win 10 64bit)
Solution
I just found the answer. You should install WinAVR, it includes the GNU GCC compiler for C and C++.
https://sourceforge.net/projects/winavr/
You can also find a good manual here:
http://avr-eclipse.sourceforge.net/user%20manual/tasks/task_path_preferences.html
Aftre intalling this tool, eclipse recognise the path automatically (or you must select it).
Answered By - PeterN