CC ?= riscv64-unknown-elf-gcc
OBJCOPY ?= riscv64-unknown-elf-objcopy
ROM_BASE ?= 0x00100

LDFLAGS=-Tlinker.ld -nostdlib -nostartfiles -nodefaultlibs -static -Wl,--no-gc-sections -Wl,--defsym=ROM_BASE=$(ROM_BASE)

b=rbootrom

all: $b.elf $b.bin

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

$b.elf: $b.o linker.ld
	$(CC) $(LDFLAGS) -o $@ $<

$b.bin: $b.elf
	$(OBJCOPY) -O binary $b.elf $b.bin

clean:
	rm -f $b.elf $b.bin $b.o

.PHONY: clean all