CROSS_COMPILE = arm-none-eabi-
AS = $(CROSS_COMPILE)as
CC = $(CROSS_COMPILE)gcc
LD = $(CROSS_COMPILE)ld
OBJCOPY = $(CROSS_COMPILE)objcopy

CFLAGS = -Wall -mcpu=arm926ej-s -nostdlib -ffreestanding

all: kernel.bin

kernel.elf: boot.o kernel.o
	$(LD) -T boot.ld -o $@ $^

kernel.bin: kernel.elf
	$(OBJCOPY) -O binary $< $@

boot.o: boot.s
	$(AS) -mcpu=arm926ej-s $< -o $@

kernel.o: kernel.c
	$(CC) $(CFLAGS) -c $< -o $@

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