8233530: gcc 5.4 build warning -Wc++14-compat after JDK-8233359

Reviewed-by: dholmes, goetz

Author: tstuefe

src/hotspot/share/memory/operator_new.cpp

@@ -89,6 +89,12 @@ void operator delete [](void* p) throw() {
   fatal("Should not call global delete []");
 }
 
+#ifdef __GNUG__
+// Warning disabled for gcc 5.4
+PRAGMA_DIAG_PUSH
+PRAGMA_DISABLE_GCC_WARNING("-Wc++14-compat")
+#endif // __GNUG__
+
 void operator delete(void* p, size_t size) throw() {
   fatal("Should not call global sized delete");
 }
@@ -97,4 +103,8 @@ void operator delete [](void* p, size_t size) throw() {
   fatal("Should not call global sized delete []");
 }
 
+#ifdef __GNUG__
+PRAGMA_DIAG_POP
+#endif // __GNUG__
+
 #endif // Non-product