-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
-// Complex arithmetic
-// ----------------------------------------------------------------------------
-
-#ifndef __COMPLEX_H
-#define __COMPLEX_H __COMPLEX_H
-
+/* ----------------------------------------------------------------------------
+ * $Id$
+ * ----------------------------------------------------------------------------
+ * Public Domain C Library - http://pdclib.sourceforge.net
+ * This code is Public Domain. Use, modify, and redistribute at will.
+ * ----------------------------------------------------------------------------
+ * Complex arithmetic
+ * --------------------------------------------------------------------------*/
+
+#ifndef _COMPLEX_H
+#define _COMPLEX_H _COMPLEX_H
+
+#ifndef _PERSONALITY
+#define _PERSONALITY _PERSONALITY