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diff --git a/src/m/ibmrt.h b/src/m/ibmrt.h
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-/* RTPC machine dependent defines
- Copyright (C) 1986 Free Software Foundation, Inc.
-
-This file is part of GNU Emacs.
-
-GNU Emacs 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 Emacs 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 Emacs; see the file COPYING. If not, write to
-the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
-
-
-/* The following line tells the configuration script what sort of
- operating system this machine is likely to run.
- USUAL-OPSYS="bsd4-2" */
-
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
- is the most significant byte. */
-
-#define WORDS_BIG_ENDIAN
-
-/* Define NO_ARG_ARRAY if you cannot take the address of the first of a
- * group of arguments and treat it as an array of the arguments. */
-
-#define NO_ARG_ARRAY
-
-/* Define WORD_MACHINE if addresses and such have
- * to be corrected before they can be used as byte counts. */
-
-#define WORD_MACHINE
-
-/* Now define a symbol for the cpu type, if your compiler
- does not define it automatically. */
-
-#define ibmrt
-#define romp /* unfortunately old include files are hanging around. */
-
-/* Use type int rather than a union, to represent Lisp_Object */
-/* This is desirable for most machines. */
-
-#define NO_UNION_TYPE
-
-/* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
- the bit field into an int. In other words, if bit fields
- are always unsigned.
-
- If you use NO_UNION_TYPE, this flag does not matter. */
-
-#define EXPLICIT_SIGN_EXTEND
-
-/* Data type of load average, as read out of kmem. */
-
-#define LOAD_AVE_TYPE double /* For AIS (sysV) */
-
-/* Convert that into an integer that is 100 for a load average of 1.0 */
-
-#define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0)
-
-/* Define CANNOT_DUMP on machines where unexec does not work.
- Then the function dump-emacs will not be defined
- and temacs will do (load "loadup") automatically unless told otherwise. */
-
-/* #define CANNOT_DUMP */
-
-/* Define VIRT_ADDR_VARIES if the virtual addresses of
- pure and impure space as loaded can vary, and even their
- relative order cannot be relied on.
-
- Otherwise Emacs assumes that text space precedes data space,
- numerically. */
-
-#undef VIRT_ADDR_VARIES
-
-/* Define C_ALLOCA if this machine does not support a true alloca
- and the one written in C should be used instead.
- Define HAVE_ALLOCA to say that the system provides a properly
- working alloca function and it should be used.
- Define neither one if an assembler-language alloca
- in the file alloca.s should be used. */
-
-#define HAVE_ALLOCA
-
-/* The data segment in this machine starts at a fixed address.
- An address of data cannot be stored correctly in a Lisp object;
- we always lose the high bits. We must tell XPNTR to add them back. */
-
-#define DATA_SEG_BITS 0x10000000
-#define DATA_START 0x10000000
-
-/* The text segment always starts at a fixed address.
- This way we don't need to have a label _start defined. */
-#define TEXT_START 0
-
-/* Taking a pointer to a char casting it as int pointer */
-/* and then taking the int which the int pointer points to */
-/* is practically guaranteed to give erroneous results */
-
-#define NEED_ERRNO
-
-#define SKTPAIR
-
-/* BSD has BSTRING. */
-
-#define BSTRING
-
-/* Special switches to give the C compiler. */
-
-#ifndef __GNUC__
-#define C_SWITCH_MACHINE -Dalloca=_Alloca
-#endif
-
-/* Don't attempt to relabel some of the data as text when dumping.
- It does not work because their virtual addresses are not consecutive.
- This enables us to use the standard crt0.o. */
-
-#define NO_REMAP
-
-/* Use the bitmap files that come with Emacs. */
-#define EMACS_BITMAP_FILES