--- a/src/hotspot/share/runtime/flags/jvmFlag.cpp	Tue May 29 13:44:44 2018 +0200
+++ b/src/hotspot/share/runtime/flags/jvmFlag.cpp	Tue May 29 11:04:56 2018 -0500
@@ -1504,3 +1504,12 @@
   FREE_C_HEAP_ARRAY(JVMFlag*, array);
 }
 
+void JVMFlag::printError(bool verbose, const char* msg, ...) {
+  if (verbose) {
+    va_list listPointer;
+    va_start(listPointer, msg);
+    jio_vfprintf(defaultStream::error_stream(), msg, listPointer);
+    va_end(listPointer);
+  }
+}
+