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diff --git a/gcc/config/rs6000/linux.h b/gcc/config/rs6000/linux.h
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+/* Definitions of target machine for GNU compiler,
+   for IBM RS/6000 running AIX version 3.1.
+   Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
+   Contributed by Michael Meissner (meissner@cygnus.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 "rs6000/sysv4.h"
+
+#undef CPP_PREDEFINES
+#define CPP_PREDEFINES \
+ "-DPPC -D__ELF__ -Dunix -Dlinux -Dpowerpc -Asystem(unix) -Asystem(linux) -Acpu(powerpc) -Amachine(powerpc)"
+
+#undef	CPP_OS_DEFAULT_SPEC
+#define CPP_OS_DEFAULT_SPEC "%(cpp_os_linux)"
+
+#undef LINK_SPEC
+#define LINK_SPEC "-m elf32ppc %{G*} %{shared:-shared} \
+  %{!shared: \
+    %{!static: \
+      %{rdynamic:-export-dynamic} \
+      %{!dynamic-linker:-dynamic-linker /lib/ld.so.1}} \
+    %{static:-static}}"
+
+#undef	LIB_DEFAULT_SPEC
+#define LIB_DEFAULT_SPEC "%(lib_linux)"
+
+#undef	STARTFILE_DEFAULT_SPEC
+#define STARTFILE_DEFAULT_SPEC "%(startfile_linux)"
+
+#undef	ENDFILE_DEFAULT_SPEC
+#define ENDFILE_DEFAULT_SPEC "%(endfile_linux)"
+
+#undef	LINK_START_DEFAULT_SPEC
+#define LINK_START_DEFAULT_SPEC "%(link_start_linux)"
+
+#undef	LINK_OS_DEFAULT_SPEC
+#define LINK_OS_DEFAULT_SPEC "%(link_os_linux)"
+
+#undef TARGET_VERSION
+#define TARGET_VERSION fprintf (stderr, " (PowerPC GNU/Linux)");
+
+/* Define this macro as a C expression for the initializer of an
+   array of string to tell the driver program which options are
+   defaults for this target and thus do not need to be handled
+   specially when using `MULTILIB_OPTIONS'.
+
+   Do not define this macro if `MULTILIB_OPTIONS' is not defined in
+   the target makefile fragment or if none of the options listed in
+   `MULTILIB_OPTIONS' are set by default.  *Note Target Fragment::.  */
+
+#undef	MULTILIB_DEFAULTS
+#define	MULTILIB_DEFAULTS { "mbig", "mcall-linux" }
+
+#undef DEFAULT_VTABLE_THUNKS
+#ifndef USE_GNULIBC_1
+#define DEFAULT_VTABLE_THUNKS 1
+#endif
+
+#undef JUMP_TABLES_IN_TEXT_SECTION
+#define JUMP_TABLES_IN_TEXT_SECTION 0