avr.c (avr_handle_fndecl_attribute): Generate a warning if the function name does not begin with "__vector" and the...

	* config/avr/avr.c (avr_handle_fndecl_attribute): Generate a
	warning if the function name does not begin with "__vector" and the
	function has either the 'signal' or 'interrupt' attribute.

From-SVN: r91433