Ah, if that's the case then try running gcc from the command line. It *should* work. If it doesn't, copy gcc, as, objcopy, and ld to the project directory (where the Makefile is) and rename them to arm-eabi-gcc, arm-none-eabi-as, arm-none-eabi-objcopy and arm-none-eabi-ld. If it did work, try editing the makefile to use those executables instead (ie replace arm-none-eabi-gcc with just gcc)