-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
-// Boolean type and values
-// ----------------------------------------------------------------------------
-
-#ifndef __STDBOOL_H
-#define __STDBOOL_H __STDBOOL_H
-
-// ----------------------------------------------------------------------------
-// MACROS
+/* ----------------------------------------------------------------------------
+ * $Id$
+ * ----------------------------------------------------------------------------
+ * Public Domain C Library - http://pdclib.sourceforge.net
+ * This code is Public Domain. Use, modify, and redistribute at will.
+ * ----------------------------------------------------------------------------
+ * Boolean type and values
+ * ----------------------------------------------------------------------------
+ * This header is part of a freestanding implementation
+ * --------------------------------------------------------------------------*/
+
+#ifndef _STDBOOL_H
+#define _STDBOOL_H _STDBOOL_H
+
+/* ----------------------------------------------------------------------------
+ * MACROS
+ * --------------------------------------------------------------------------*/