diff --git a/gcc/config/rs6000/xm-rs6000.h b/gcc/config/rs6000/xm-rs6000.h
new file mode 100644
index 0000000000000000000000000000000000000000..a2671675f09d23990508528f33f79591a08982f6
--- /dev/null
+++ b/gcc/config/rs6000/xm-rs6000.h
@@ -0,0 +1,57 @@
+/* Configuration for GNU C-compiler for IBM RS/6000.
+   Copyright (C) 1990 Free Software Foundation, Inc.
+   Contributed by Richard Kenner (kenner@nyu.edu).
+
+This file is part of GNU CC.
+
+GNU CC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU CC 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU CC; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+
+/* #defines that need visibility everywhere.  */
+#define	FALSE	0
+#define	TRUE	1
+
+/* This describes the machine the compiler is hosted on.  */
+#define	HOST_BITS_PER_CHAR	8
+#define	HOST_BITS_PER_SHORT	16
+#define	HOST_BITS_PER_INT	32
+#define	HOST_BITS_PER_LONG	32
+#define HOST_BITS_PER_LONGLONG 64
+
+#define	HOST_WORDS_BIG_ENDIAN
+
+/* target machine dependencies.
+   tm.h is a symbolic link to the actual target specific file.   */
+#include "tm.h"
+
+/* Arguments to use with `exit'.  */
+#define	SUCCESS_EXIT_CODE	0
+#define	FAILURE_EXIT_CODE	2
+#define	FATAL_EXIT_CODE		3
+
+/* If compiled with GNU C, use the built-in alloca.  */
+#ifdef __GNUC__
+#define alloca __builtin_alloca
+#else
+#define USE_C_ALLOCA
+#endif
+
+/* If not compiled with GNU C, use only int bitfields.  */
+#ifndef __GNUC__
+#define	ONLY_INT_FIELDS
+#endif
+
+
+#define	USG