Hi,first at all: I did not receive the mail from Jonathan, I only see the quotation from his post??
Check the output of 'env' -- is /opt/avr_8.3.0/avr/bin in your PATH? Do you have any variables like AS_FOR_BUILD set?
No, I did not set anything special to my environment. I simply run a fresh bash and execute the Makefile with the targets as reported in my first mail.
Regards Klaus