+ifdef SELECTOR
+SELECTOR_ACTUAL=$(SELECTOR)
+else ifndef MAKECMDGOALS
+SELECTOR_ACTUAL=$(SELECTOR_DEFAULT)
+else ifeq ($(MAKECMDGOALS),all)
+SELECTOR_ACTUAL=$(SELECTOR_DEFAULT)
+else ifeq ($(MAKECMDGOALS),check)
+SELECTOR_ACTUAL=$(SELECTOR_DEFAULT)
+else ifeq ($(MAKECMDGOALS),check-maybe)