Index: src/Common/utility.h
===================================================================
--- src/Common/utility.h	(revision 43c461da57a6b7e67b030127cc6b531975a67091)
+++ src/Common/utility.h	(revision 01ff4e13225100fff96400a30dd716c92b951c09)
@@ -10,6 +10,6 @@
 // Created On       : Mon May 18 07:44:20 2015
 // Last Modified By : Peter A. Buhr
-// Last Modified On : Thu May  3 12:18:31 2018
-// Update Count     : 39
+// Last Modified On : Sun May  6 22:24:16 2018
+// Update Count     : 40
 //
 
@@ -442,5 +442,5 @@
 template<typename T>
 inline
-#if __GNUC__ > 4
+#if defined(__GNUC__) && __GNUC__ > 4
 constexpr
 #endif