diff -r 000000000000 -r 6474c204b198 build/pymake/tests/commandmodifiers.mk
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/build/pymake/tests/commandmodifiers.mk	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,21 @@
+define COMMAND
+$(1)
+ 	$(1)
+
+endef
+
+all:
+	$(call COMMAND,@true #TEST-FAIL)
+	$(call COMMAND,-exit 4)
+	$(call COMMAND,@-exit 1 # TEST-FAIL)
+	$(call COMMAND,-@exit 1 # TEST-FAIL)
+	$(call COMMAND,+exit 0)
+	$(call COMMAND,+-exit 1)
+	$(call COMMAND,@+exit 0 # TEST-FAIL)
+	$(call COMMAND,+@exit 0 # TEST-FAIL)
+	$(call COMMAND,-+@exit 1 # TEST-FAIL)
+	$(call COMMAND,+-@exit 1 # TEST-FAIL)
+	$(call COMMAND,@+-exit 1 # TEST-FAIL)
+	$(call COMMAND,@+-@+-exit 1 # TEST-FAIL)
+	$(call COMMAND,@@++exit 0 # TEST-FAIL)
+	@echo TEST-PASS