diff -r 000000000000 -r 6474c204b198 build/pymake/tests/env-var-append.mk
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/build/pymake/tests/env-var-append.mk	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,7 @@
+#T environment: {'FOO': 'TEST'}
+
+FOO += $(BAR)
+BAR := PASS
+
+all:
+	@echo $(subst $(NULL) ,-,$(FOO))