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diff --git a/gdb/xm-sun3os4.h b/gdb/xm-sun3os4.h
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-/* Macro definitions for a sun 3 running os 4.
- Copyright (C) 1989, Free Software Foundation, Inc.
-
-This file is part of GDB.
-
-This program 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 of the License, or
-(at your option) any later version.
-
-This program 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 this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-#include "xm-sun3.h"
-#define FPU
-
-/* Large alloca's fail because the attempt to increase the stack limit in
- main() fails because shared libraries are allocated just below the initial
- stack limit. The SunOS kernel will not allow the stack to grow into
- the area occupied by the shared libraries. Sun knows about this bug
- but has no obvious fix for it. */
-#define BROKEN_LARGE_ALLOCA
-
-/* SunOS 4.x has memory mapped files. */
-
-#define HAVE_MMAP
-
-/* If you expect to use the mmalloc package to obtain mapped symbol files,
- for now you have to specify some parameters that determine how gdb places
- the mappings in it's address space. See the comments in map_to_address()
- for details. This is expected to only be a short term solution. Yes it
- is a kludge.
- FIXME: Make this more automatic. */
-
-#define MMAP_BASE_ADDRESS 0xE0000000 /* First mapping here */
-#define MMAP_INCREMENT 0x01000000 /* Increment to next mapping */
-
-/* Prevent type conflicts between yacc malloc decls and defs.h */
-#define MALLOC_INCOMPATIBLE
-extern char *malloc();
-extern char *realloc();
-extern void free();