diff -r 000000000000 -r 6474c204b198 build/pymake/tests/serial-doublecolon-execution.mk
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/build/pymake/tests/serial-doublecolon-execution.mk	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,18 @@
+#T commandline: ['-j3']
+
+# Commands of double-colon rules are always executed in order.
+
+all: dc
+	cat status
+	test "$$(cat status)" = "all1:all2:"
+	@echo TEST-PASS
+
+dc:: slowt
+	printf "all1:" >> status
+
+dc::
+	sleep 0.2
+	printf "all2:" >> status
+
+slowt:
+	sleep 1