MAKEFLAGS += -R -r

CROSS	  = riscv32-unknown-elf-
CC	  = $(CROSS)gcc
LD	  = $(CROSS)ld
OBJCOPY   = $(CROSS)objcopy
PERL      = perl
CFLAGS	  =  -march=rv32imc -O2 -ggdb3 -mabi=ilp32 \
	     -mshorten-memrefs -mno-strict-align
LDFLAGS   = --section-start=.init=0 -z common-page-size=16 -z max-page-size=16

# Delete output files on error
.DELETE_ON_ERROR:

# Don't delete intermediate files
.SECONDARY:

all: boot.mif

boot.elf: head.o hello.o
boot_depth := 2048
boot_width := 32

%.mif: %.bin bin2mif.pl
	$(PERL) bin2mif.pl $< $@ $($*_depth) $($*_width)

%.hex: %.elf
	$(OBJCOPY) -O ihex $< $@

%.mem: %.bin
	$(BIN2MEM) $< > $@

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

%.elf:
	$(LD) $(LDFLAGS) -o $@ $^

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

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

%.i: %.c
	$(CC) $(CFLAGS) -E -o $@ $<

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

%.s: %.S
	$(CC) $(CFLAGS) -E -o $@ $<

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

spotless: clean
	rm -f *.mem *.hex *.mif