ASMOBJS         := $(patsubst %.asm,%.o,$(wildcard *.asm))
COBJS           := $(patsubst %.c,%.o,$(wildcard *.c))
CXXOBJS         := $(patsubst %.cc,%.o,$(wildcard *.cc))
CDEPS           := $(COBJS:.o=.dep)
CXXDEPS         := $(CXXOBJS:.o=.dep)
DEPS			:= $(CDEPS) $(CXXDEPS)
OUTPUT_FILE     := $(SUBDIR)_all.o

ifdef SUBDIRS
SUBDIRS_clean   := $(SUBDIRS:%=%.clean)
endif

all: $(OUTPUT_FILE)

$(OUTPUT_FILE): $(ASMOBJS) $(COBJS) $(CXXOBJS) $(SUBDIRS)
	$(LD) -r -o $@ $(ASMOBJS) $(COBJS) $(CXXOBJS) $(foreach subdir,$(SUBDIRS),$(subdir)/$(subdir)_all.o)

%.o: %.asm
	$(NASM) -f elf -o $@ -l $<.lst $<

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

%.o: %.cc
	$(CXX) -c -o $@ $(CPPFLAGS) $(CXXFLAGS) $<

ifdef SUBDIRS
.PHONY: $(SUBDIRS)
$(SUBDIRS):
	$(MAKE) -C $@ SUBDIR=$@
endif

# Make dependency files
%.dep: %.c
	@set -e; rm -f $@; \
	  $(CC) -MM $(CPPFLAGS) $< | sed 's,\($*\)\.o[ :]*,\1.o $@ : ,g' > $@

%.dep: %.cc
	@set -e; rm -f $@; \
	  $(CXX) -MM $(CPPFLAGS) $< | sed 's,\($*\)\.o[ :]*,\1.o $@ : ,g' > $@

clean: $(SUBDIRS_clean)
	-rm -f *.o *.dep *.lst *~

ifdef SUBDIRS
%.clean:
	$(MAKE) -C $* clean clean=1
endif

# Include dependency files
ifndef clean
-include $(DEPS)
endif