KERNEL  := hos
LDFLAGS := -T link.ld

export PLATFORM := $(shell if [[ `uname` =~ "CYGWIN" ]]; then \
                             echo cygwin; \
                           else \
                             echo unix; \
                           fi)
ifeq ($(PLATFORM), cygwin)
export LD		:= i586-elf-ld
export CC		:= i586-elf-gcc
export CXX		:= i586-elf-g++
else
export LD      := ld
export CC      := gcc
export CXX     := g++
endif
export NASM    := nasm


.PHONY: all
all: $(KERNEL).gz

$(KERNEL).gz: $(KERNEL)
	gzip -c $< > $@

$(KERNEL): boot.o
	$(LD) $(LDFLAGS) -o $@ $<

boot.o: boot.asm
	$(NASM) -f elf -o $@ $<

.PHONY: clean
clean:
	-rm -f *~ $(KERNEL) $(KERNEL).gz *.o