New file.

From-SVN: r3631

gcc/config/h8300/t-h8300

+LIBGCC1 = libgcc1.null
+T_CFLAGS = -DDONT_HAVE_STDIO -DDONT_HAVE_SETJMP 
+# we do not have DF or DI types, so fake out the libgcc2 compilation
+LIBGCC2_CFLAGS=-O -DDF=SF -DDI=SI $(GCC_CFLAGS) 
+LIB2FUNCS_EXTRA =

gcc/config/h8300/xm-h8300.h

+/* Configuration for GNU C-compiler for H8/300.
+   Copyright (C) 1993 Free Software Foundation, Inc.
+
+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 16
+#define HOST_BITS_PER_LONG 32
+#define HOST_BITS_PER_LONGLONG 64
+
+/* Arguments to use with `exit'.  */
+#define SUCCESS_EXIT_CODE 0
+#define FATAL_EXIT_CODE 33
+
+/* If compiled with GNU C, use the built-in alloca */
+#ifdef __GNUC__
+#define alloca __builtin_alloca
+#else
+#define USE_C_ALLOCA
+#endif
+
+/* target machine dependencies.
+   tm.h is a symbolic link to the actual target specific file.   */
+#include "tm.h"
+