diff -r 000000000000 -r 6474c204b198 build/pymake/tests/func-refs.mk
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/build/pymake/tests/func-refs.mk	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,11 @@
+unknown var = uval
+
+all:
+	test "$(subst a,b,value)" = "vblue"
+	test "${subst a,b,va)lue}" = "vb)lue"
+	test "$(subst /,\,ab/c)" = "ab\c"
+	test '$(subst a,b,\\#)' = '\\#'
+	test "$( subst a,b,value)" = ""
+	test "$(Subst a,b,value)" = ""
+	test "$(unknown var)" = "uval"
+	@echo TEST-PASS