-.PHONY: report.main report.gcc report.modules report.var report.true
+.PHONY: report.main report.gcc report.modules report.var report.true report.help
+.PHONY: shell.run
report.modules::
@echo " ----------------------------------------------------------------"
$(foreach n,main gcc var,$(call REPORT.help.item.global,$n))
$(foreach n,$(MODULES.NAMES),$(call REPORT.help.item.module,$n))
+
+## diagnostic aid when troubleshooting build issues
+shell.run:
+ $(command)