diff -r eb22ea192d73 -r 62b5f067032e make/common/MakeBase.gmk
--- a/make/common/MakeBase.gmk	Thu Apr 07 12:44:23 2016 -0700
+++ b/make/common/MakeBase.gmk	Fri Apr 08 13:14:23 2016 +0200
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2016, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -731,6 +731,16 @@
   "$(subst $(SPACE),$(PATH_SEP),$(strip $1))"
 
 ################################################################################
+# Check if a specified hotspot variant is being built, or at least one of a
+# list of variants. Will return 'true' or 'false'.
+# $1 - the variant to test for
+check-jvm-variant = \
+  $(strip \
+    $(if $(filter-out $(VALID_JVM_VARIANTS), $1), \
+      $(error Internal error: Invalid variant tested: $1)) \
+    $(if $(filter $1, $(JVM_VARIANTS)), true, false))
+
+################################################################################
 
 # Hook to include the corresponding custom file, if present.
 $(eval $(call IncludeCustomExtension, , common/MakeBase.gmk))