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diff --git a/gcc/config/mips/dec-osf1.h b/gcc/config/mips/dec-osf1.h
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+/* Definitions of target machine for GNU compiler. DECstation (OSF/1) version.
+ Copyright (C) 1992, 1996, 1998 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, 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#define DEC_OSF1
+
+#define CPP_PREDEFINES "\
+-D__ANSI_COMPAT -DMIPSEL -DR3000 -DSYSTYPE_BSD -D_SYSTYPE_BSD \
+-Dbsd4_2 -Dhost_mips -Dmips -Dosf -Dunix \
+-Asystem(unix) -Asystem(xpg4) -Acpu(mips) -Amachine(mips)"
+
+#define LINK_SPEC "\
+%{G*} %{EB} %{EL} %{mips1} %{mips2} %{mips3} \
+%{bestGnum} %{shared} %{non_shared} \
+%{call_shared} %{no_archive} %{exact_version} \
+%{!shared: %{!non_shared: %{!call_shared: -non_shared}}}"
+
+#include "mips/ultrix.h"
+#include "mips/mips.h"
+
+/* Specify size_t and wchar_t types. */
+#undef SIZE_TYPE
+#undef WCHAR_TYPE
+#undef WCHAR_TYPE_SIZE
+
+#define SIZE_TYPE "long unsigned int"
+#define WCHAR_TYPE "short unsigned int"
+#define WCHAR_TYPE_SIZE SHORT_TYPE_SIZE
+
+#undef SUBTARGET_CPP_SIZE_SPEC
+#define SUBTARGET_CPP_SIZE_SPEC "\
+%{mlong64:-D__PTRDIFF_TYPE__=long\\ int} \
+%{!mlong64:-D__PTRDIFF_TYPE__=int}"
+
+/* turn off collect2 COFF support, since ldfcn now has elf declaration */
+#undef OBJECT_FORMAT_COFF
+
+#undef MACHINE_TYPE
+#define MACHINE_TYPE "DECstation running DEC OSF/1"