diff -r 000000000000 -r 6474c204b198 build/pymake/tests/parallel-toserial.mk
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/build/pymake/tests/parallel-toserial.mk	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,31 @@
+#T commandline: ['-j4']
+
+# Test that -j1 in a submake has the proper effect.
+
+define SLOWCMD
+printf "$@:0:" >>$(RFILE)
+sleep 0.5
+printf "$@:1:" >>$(RFILE)
+endef
+
+all: p1 p2
+subtarget: s1 s2
+
+p1 p2: RFILE = presult
+s1 s2: RFILE = sresult
+
+p1 s1:
+	$(SLOWCMD)
+
+p2 s2:
+	sleep 0.1
+	$(SLOWCMD)
+
+all:
+	$(MAKE) -j1 -f $(TESTPATH)/parallel-toserial.mk subtarget
+	printf "presult: %s\n" "$$(cat presult)"
+	test "$$(cat presult)" = "p1:0:p2:0:p1:1:p2:1:"
+	printf "sresult: %s\n" "$$(cat sresult)"
+	test "$$(cat sresult)" = "s1:0:s1:1:s2:0:s2:1:"
+	@echo TEST-PASS
+