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diff --git a/gnu/lib/libg++/g++-include/ACG.h b/gnu/lib/libg++/g++-include/ACG.h
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+++ b/gnu/lib/libg++/g++-include/ACG.h
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+// This may look like C code, but it is really -*- C++ -*-
+/* 
+Copyright (C) 1988 Free Software Foundation
+    written by Dirk Grunwald (grunwald@cs.uiuc.edu)
+
+This file is part of the GNU C++ Library.  This library is free
+software; you can redistribute it and/or modify it under the terms of
+the GNU Library General Public License as published by the Free
+Software Foundation; either version 2 of the License, or (at your
+option) any later version.  This library is distributed in the hope
+that it will be useful, but WITHOUT ANY WARRANTY; without even the
+implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+PURPOSE.  See the GNU Library General Public License for more details.
+You should have received a copy of the GNU Library General Public
+License along with this library; if not, write to the Free Software
+Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+	$Id: ACG.h,v 1.1 1995/10/18 08:38:14 deraadt Exp $
+*/
+
+#ifndef _ACG_h
+#define _ACG_h 1 
+
+#include <RNG.h>
+#include <math.h>
+#ifdef __GNUG__
+#pragma interface
+#endif
+
+//
+//	Additive number generator. This method is presented in Volume II
+//	of The Art of Computer Programming by Knuth. I've coded the algorithm
+//	and have added the extensions by Andres Nowatzyk of CMU to randomize
+//	the result of algorithm M a bit	by using an LCG & a spatial
+//	permutation table.
+//
+//	The version presented uses the same constants for the LCG that Andres
+//	uses (chosen by trial & error). The spatial permutation table is
+//	the same size (it's based on word size). This is for 32-bit words.
+//
+//	The ``auxillary table'' used by the LCG table varies in size, and
+//	is chosen to be the the smallest power of two which is larger than
+//	twice the size of the state table.
+//
+
+class ACG : public RNG {
+
+    unsigned long initialSeed;	// used to reset generator
+    int initialTableEntry;
+
+    unsigned long *state;
+    unsigned long *auxState;
+    short stateSize;
+    short auxSize;
+    unsigned long lcgRecurr;
+    short j;
+    short k;
+
+protected:
+
+public:
+    ACG(unsigned long seed = 0, int size = 55);
+    virtual ~ACG();
+    //
+    // Return a long-words word of random bits
+    //
+    virtual unsigned long asLong();
+    virtual void reset();
+};
+
+#endif