Makefile

CC=arm-none-eabi-gcc
#CC=clang -target armv6-none-eabi
AS=arm-none-eabi-as
#AS=clang -target armv6-none-eabi
LD=arm-none-eabi-ld
OBJCOPY=arm-none-eabi-objcopy
#OBJCOPY=llvm-objcopy-11

ARCH_FLAGS=-march=armv6
CFLAGS=-Wno-builtin-declaration-mismatch

bare_metal.bin: bare_metal.elf
	$(OBJCOPY) -O binary $^ $@

bare_metal.elf: head.o bare_metal.o printf.o isr.o syscall.o
	$(LD) $^ -T bare_metal.ld -o $@

head.o: head.S
	$(AS) $(ARCH_FLAGS) -o $@ $^

.c.o:
	$(CC) $(ARCH_FLAGS) $(CFLAGS) -c $^

clean:
	rm -f *.o *.elf *.bin