Error: L6200E: Symbol SystemInit multiply defined (by system_tm4c123.o and mazinterrupt.o).

Trying to Build some simple code, for the TI Tiva Launchpad, to teach me Interrupts and it keeps throwing up "Error: L6200E: Symbol SystemInit multiply defined (by system_tm4c123.o and mazinterrupt.o)."

I would as is my habit not have a clue what this means.

Thank you.