.PRECIOUS: $(yy_build_dir)/%.flex.c $(yy_build_dir)/%.bison.c \
	$(yy_build_dir)/%.bison.h

$(yy_build_dir)/%.flex.c: $(yy_src_dir)/%.lex | $(yy_build_dir)
	@[ -z "$(Q)" ] || echo 'FLEX $<'
	@$(FLEX) -o $@ $<

$(yy_build_dir)/%.bison.c $(yy_build_dir)/%.bison.h: $(yy_src_dir)/%.y \
		| $(yy_build_dir)
	@[ -z "$(Q)" ] || echo 'BISON $<'
	@$(BISON) --defines=$(yy_build_dir)/$(notdir $(<:.y=.bison.h)) \
		--output=$(yy_build_dir)/$(notdir $(<:.y=.bison.c)) $<

$(object_dir)/%.o: $(yy_build_dir)/%.c | $(object_dir)
	@[ -z "$(Q)" ] || echo 'CC $<'
	@$(Q) $(CC) -g -c -o $@ $(CPPFLAGS) -MMD -MF $(dep_dir)/$(*F).d \
		-MT $@ -iquote . -Wno-unused-macros $<