Makefile

PREFIX := arm-none-eabi-

CFLAGS += -mcpu=cortex-m4 -mthumb -g3 -o0
LDFLAGS += ${CFLAGS} -nostartfiles -nodefaultlibs -Wl,-Tlinker.ld

all: build.elf build.hex

main.o: main.c
	${PREFIX}gcc ${CFLAGS} -c main.c -o main.o

startup.o: startup.c
	${PREFIX}gcc ${CFLAGS} -c startup.c -o startup.o

build.elf: main.o startup.o linker.ld
	${PREFIX}gcc ${LDFLAGS} main.o startup.o  -o build.elf

build.hex: build.elf
	${PREFIX}objcopy -O ihex build.elf build.hex

.PHONY: clean

clean:
	rm build.elf *.o