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diff --git a/gcc/config/i386/lynx.h b/gcc/config/i386/lynx.h
index 91ed31e0..cd838623 100644
--- a/gcc/config/i386/lynx.h
+++ b/gcc/config/i386/lynx.h
@@ -1,39 +1,90 @@
-/* Definitions for Intel 386 running LynxOS.
-   Copyright (C) 1993, 1995, 1996 Free Software Foundation, Inc.
+/* Definitions for LynxOS on i386.
+   Copyright (C) 1993, 1995, 1996, 2002, 2004, 2005, 2007
+   Free Software Foundation, Inc. 
 
-This file is part of GNU CC.
+This file is part of GCC.
 
-GNU CC is free software; you can redistribute it and/or modify
+GCC 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)
+the Free Software Foundation; either version 3, or (at your option)
 any later version.
 
-GNU CC is distributed in the hope that it will be useful,
+GCC 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.  */
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
 
-#include <i386/gstabs.h>
-#include <lynx.h>
+#define TARGET_VERSION fputs (" (i386/LynxOS)", stderr);
 
-#undef CPP_PREDEFINES
-#define CPP_PREDEFINES "-DI386 -DLynx -DIBITS32 -Asystem=unix -Asystem=lynx"
+#define TARGET_OS_CPP_BUILTINS()		\
+  do						\
+    {						\
+      builtin_define ("__LITTLE_ENDIAN__");	\
+      builtin_define ("__x86__");		\
+    }						\
+  while (0)
 
-/* The prefix to add to user-visible assembler symbols.  */
+/* The svr4 ABI for the i386 says that records and unions are returned
+   in memory.  */
 
-/* Override the svr3 convention of adding a leading underscore.  */
+#define DEFAULT_PCC_STRUCT_RETURN 1
 
-#undef USER_LABEL_PREFIX
-#define USER_LABEL_PREFIX ""
+/* BSS_SECTION_ASM_OP gets defined i386/unix.h.  */
 
-/* Apparently LynxOS clobbers ebx when you call into the OS.  */
+#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
+  asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
 
-#undef CALL_USED_REGISTERS
-#define CALL_USED_REGISTERS \
-/*ax,dx,cx,bx,si,di,bp,sp,st,st1,st2,st3,st4,st5,st6,st7,arg*/ \
-{  1, 1, 1, 1, 0, 0, 0, 1, 1,  1,  1,  1,  1,  1,  1,  1,  1 }
+/* LynxOS's GDB counts the floating point registers from 16.  */
+
+#undef DBX_REGISTER_NUMBER
+#define DBX_REGISTER_NUMBER(n)						\
+  (TARGET_64BIT ? dbx64_register_map[n]					\
+   : (n) == 0 ? 0							\
+   : (n) == 1 ? 2							\
+   : (n) == 2 ? 1							\
+   : (n) == 3 ? 3							\
+   : (n) == 4 ? 6							\
+   : (n) == 5 ? 7							\
+   : (n) == 6 ? 5							\
+   : (n) == 7 ? 4							\
+   : ((n) >= FIRST_STACK_REG && (n) <= LAST_STACK_REG) ? (n) + 8	\
+   : (-1))
+  
+/* A C statement to output to the stdio stream FILE an assembler
+   command to advance the location counter to a multiple of 1<<LOG
+   bytes if it is within MAX_SKIP bytes.
+
+   This is used to align code labels according to Intel recommendations.  */
+
+#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
+#define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP)			\
+  do {									\
+    if ((LOG) != 0) {							\
+      if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG));	\
+      else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP));	\
+    }									\
+  } while (0)
+#endif
+
+/* Undefine SUBTARGET_EXTRA_SPECS it is empty anyway.  We define it in
+   config/lynx.h.  */
+
+#undef SUBTARGET_EXTRA_SPECS
+
+/* Undefine the definition from att.h to enable our default.  */
+
+#undef ASM_OUTPUT_ALIGN
+
+/* Undefine the definition from elfos.h to enable our default.  */
+
+#undef PREFERRED_DEBUGGING_TYPE
+
+/* The file i386.c defines TARGET_HAVE_TLS unconditionally if
+   HAVE_AS_TLS is defined.  HAVE_AS_TLS is defined as gas support for
+   TLS is detected by configure.  We undefine it here.  */
+
+#undef HAVE_AS_TLS