src/java.desktop/unix/native/libawt_xawt/awt/multiVis.h

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2020, 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
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this

@@ -61,10 +61,14 @@
 other dealings in this Software without prior written authorization
 from The Open Group.
 
  ------------------------------------------------------------------------ **/
 
+#ifdef HEADLESS
+    #error This file should not be included in headless library
+#endif
+
 extern int GetMultiVisualRegions(
     Display *, Window, int, int, unsigned int,
     unsigned int, int *, int *, XVisualInfo **, int *,
     OverlayInfo  **, int *, XVisualInfo ***, list_ptr *,
     list_ptr *, int *