Vijay Holimath <vijay@xxxxxxxxx> writes: > I am using gcc compiler for v850e cpu. When I use the > arrtribute: __attribute__ ((interrupt_handler)) or __attribute__ > ((interrupt); for interrupt function, say for example ... > I am getting following error messages when I compile: > > main.o (.text+0xea): In function 'swnmi': undefined reference to '__ep' > > main.o (.text+0xee): In function 'swnmi': undefined reference to '__ep' It looks like the compiler expects the linker to define __ep. Make sure you have an up to date version of the GNU binutils. Ian