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diff --git a/gcc/config/mips/svr3-4.h b/gcc/config/mips/svr3-4.h
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+/* Definitions of target machine for GNU compiler. 
+   MIPS RISC-OS System V version.
+   Copyright (C) 1991 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 MIPS_SYSV
+
+#define CPP_PREDEFINES "\
+-Dmips -Dunix -Dhost_mips -DMIPSEB -DR3000 -DSYSTYPE_SYSV \
+-D_mips -D_unix -D_host_mips -D_MIPSEB -D_R3000 -D_SYSTYPE_SYSV \
+-Asystem(unix) -Asystem(svr3) -Acpu(mips) -Amachine(mips)"
+
+#define STANDARD_INCLUDE_DIR "/sysv/usr/include"
+
+#define LINK_SPEC "\
+%{G*} %{EB} %{EL} %{mips1} %{mips2} %{mips3} \
+%{bestGnum} %{shared} %{non_shared} \
+-systype /sysv/"
+		    
+#define LIB_SPEC "%{p:-lprof1} %{pg:-lprof1} -lc crtn.o%s"
+
+#define STARTFILE_SPEC "%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt1.o%s}}"
+
+#define MACHINE_TYPE "RISC-OS System V Mips"
+
+/* Override defaults for finding the MIPS tools.  */
+#define MD_STARTFILE_PREFIX "/sysv/usr/lib/cmplrs/cc/"
+#define MD_EXEC_PREFIX "/sysv/usr/lib/cmplrs/cc/"
+
+/* Mips System V doesn't have a getpagesize() function needed by the
+   trampoline code, so use the POSIX sysconf function to get it.
+   This is only done when compiling the trampoline code.  */
+
+#ifdef  L_trampoline
+#include <sys/param.h>
+#include <unistd.h>
+
+#ifdef _SC_PAGE_SIZE
+#define getpagesize()	sysconf(_SC_PAGE_SIZE)
+
+#else				/* older rev of OS */
+#define getpagesize()	(NBPC)
+#endif /* !_SC_PAGE_SIZE */
+#endif /*  L_trampoline */
+
+/* Generate calls to memcpy, etc., not bcopy, etc.  */
+#define TARGET_MEM_FUNCTIONS