diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 5432e5bdb3a986a42d49d0a82d65afcbd9c5fdda..c8e5816c2abd662db51b0fdc84e7749761a0c54e 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+1999-12-20  Michael Hayes  <m.hayes@elec.canterbury.ac.nz>
+
+	* config/c4x/rtems.h: New file.
+
 1999-12-19  Bernd Schmidt  <bernds@cygnus.co.uk>
 
 	* reload1.c (spill_failure): Take class of failed reload as argument
diff --git a/gcc/config/c4x/rtems.h b/gcc/config/c4x/rtems.h
new file mode 100644
index 0000000000000000000000000000000000000000..f4c92977a9c2ebea96cc70fd4f47a371793adaa9
--- /dev/null
+++ b/gcc/config/c4x/rtems.h
@@ -0,0 +1,34 @@
+/* Definitions of RTEMS executing on an TMS320C[34]x using coff
+   Copyright (C) 1996, 1997, 1999 Free Software Foundation, Inc.
+   Contributed by Joel Sherrill (joel@OARcorp.com).
+
+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, 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#include "c4x/c4x.h"
+
+/* Specify predefined symbols in preprocessor.  */
+
+#undef CPP_PREDEFINES
+#define CPP_PREDEFINES "-D__rtems__ -Asystem(rtems)"
+
+/* Generate calls to memcpy, memcmp and memset.  */
+#ifndef TARGET_MEM_FUNCTIONS
+#define TARGET_MEM_FUNCTIONS
+#endif
+
+/* End of c4x/rtems.h.  */