Merge branch 'gcc8.GeneratorUtils-20181011' into 'master'

GeneratorUtils: Suppress a gcc8 warning from boost.

See merge request atlas/athena!14934

Generators/GeneratorUtils/test/StringParse_test.cxx

@@ -2,7 +2,17 @@
   Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
 */
 
+// Suppress a gcc8 warning from boost.
+// (Binaries apparently include boost with -I rather than -isystem.)
+// Fixed in boost 1.68 (see https://github.com/boostorg/mpl/issues/31)
+#ifdef __GNUC__
+# pragma GCC diagnostic push
+# pragma GCC diagnostic ignored "-Wparentheses"
+#endif
 #include "GeneratorUtils/StringParse.h"
+#ifdef __GNUC__
+# pragma GCC diagnostic pop
+#endif
 #include <iostream>
 #include <cmath>