H=@

DIRECTORIES = $(shell cat Make)

INCLUDES = $(DIRECTORIES:%=-I %) 

OCAMLDEP  = ocamlfind ocamldep -native $(INCLUDES)
OCAMLOPT  = ocamlfind opt -linkpkg -package "$(REQUIRES)" $(INCLUDES)
OCAMLLEX  = ocamllex.opt
OCAMLYACC = ocamlyacc -v
TAR       = tar -czf $(MAIN:%=%.tgz)
GZIP      = gzip

define DIR_TEMPLATE
   MODULES += $$(addprefix $(1)/,$$(shell cat $(1)/Make))
endef

define MOD_TEMPLATE
   SOURCES += $$(if $$(wildcard $(1).ml[yi]),$(1).mli $(1).ml,$(1).ml)  
   CMXS    += $(1).cmx
   CLEAN   += $(1).cmi $(1).cmx $(1).o 
   CLEAN   += $$(if $$(wildcard $(1).ml[ly]),$(1).ml,)
   CLEAN   += $$(if $$(wildcard $(1).mly),$(1).mli $(1).output,)
   KEEP    += $$(if $$(wildcard $(1).mly),$(1).mly,\
               $$(if $$(wildcard $(1).mll),$(1).mll,\
	        $$(if $$(wildcard $(1).mli),$(1).mli $(1).ml,$(1).ml)\
               )\
	      )
endef

$(foreach DIR,$(DIRECTORIES),$(eval $(call DIR_TEMPLATE, $(DIR))))
$(foreach MOD,$(MODULES),$(eval $(call MOD_TEMPLATE, $(MOD))))

OBJECTS = $(patsubst %.ml,%.cmx,$(SOURCES:%.mli=%.cmi))
CLEAN += $(MAIN).opt

all opt: .depend.opt
	@$(MAKE) --no-print-directory $(MAIN).opt

$(MAIN).opt: $(OBJECTS)
	@echo "  OCAMLOPT -o $(MAIN).opt"
	$(H)$(OCAMLOPT) -o $(MAIN).opt $(CMXS)

.depend.opt: $(SOURCES) 
	@echo "  OCAMLDEP -native"
	$(H)$(OCAMLDEP) $^ > .depend.opt

clean:
	@echo "  CLEAN . $(DIRECTORIES)"
	$(H)find -name "*~" | xargs $(RM) $(CLEAN)

tgz: clean
	@echo "  TAR -czf $(MAIN:%=%.tgz) . $(DIRECTORIES)" 
	$(H)find -name "Make*" | xargs $(TAR) $(KEEP)

%.ml %.mli: %.mly
	@echo "  OCAMLYACC $<"
	$(H)$(OCAMLYACC) $<
%.ml: %.mll
	@echo "  OCAMLLEX $<"
	$(H)$(OCAMLLEX) $<
%.cmi: %.mli
	@echo "  OCAMLOPT $<"
	$(H)$(OCAMLOPT) -c $<
%.cmx: %.ml
	@echo "  OCAMLOPT $<"
	$(H)$(OCAMLOPT) -c $<

ifeq ($(MAKECMDGOALS), $(MAIN).opt)
  include .depend.opt
endif