ifndef missingMappingsCmd

$(error $$(missingMappingsCmd) required)

endif

missingMappingTypes = join non-empty_join input

missing_mappings: _always $(missingMappingTypes:%=missing_%_mappings) ;

missingMappingsMsg = Missing $(*2Space) mappings:$(if\

$(filter join,$*), (indicates mapping to invalid location))

missing_%_mappings: _always # stem is one of $(missingMappingTypes)

	@echo $(emph)"$(missingMappingsMsg)"$(endEmph)

	@$(missingMappingsCmd)