Define -DOBJECT when generating Makefile rules, for consistency.

Inhibit -Werror when generating Makefile rules, to prevent warnings
from killing the dependency list.

src/Makefile.housekeeping

 #
 define obj_template
 
-	@$(CPP) $(CFLAGS) $(CFLAGS_$(3)) $(CFLAGS_$(4)) \
-		-M $(1) -MT "$(4)_DEPS" -MG -MP | \
+	@$(CPP) $(CFLAGS) $(CFLAGS_$(3)) $(CFLAGS_$(4)) -DOBJECT=$(4) \
+		-Wno-error -M $(1) -MT "$(4)_DEPS" -MG -MP | \
 		sed 's/_DEPS\s*:/_DEPS =/' >> $(2)
 	@echo -e '\n$$(BIN)/$(4).o : $(1) $$(MAKEDEPS) $$($(4)_DEPS)' \
 		 '\n\t$$(QM)echo "  [BUILD] $$@"\n' \