CROSS_COMPILE = stm32- CC = $(CROSS_COMPILE)gcc OBJCOPY = $(CROSS_COMPILE)objcopy all: stm32_opterase.bin stm32_optprog.bin %.bin: %.S $(CC) -nostdlib -Wl,-Ttext,0x20000000 $< $(OBJCOPY) -O binary a.out $@ clean: -rm *.bin