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diff --git a/src/m/sun3.h b/src/m/sun3.h
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-/* machine description file for Sun 68000's OPERATING SYSTEM version 3
- (for either 68000 or 68020 systems). */
-
-#include "sun2.h"
-#undef sun2
-#ifndef sun3
-#define sun3
-#endif
-
-/* The following line tells the configuration script what sort of
- operating system this machine is likely to run.
- USUAL-OPSYS="note"
-
-NOTE-START
-Sun 1, 2 and 3 (-machine=sun1, -machine=sun2, -machine=sun3;
- -opsystem=bsd4-2 or -opsystem=sunos4)
-
- Whether you should use sun1, sun2 or sun3 depends on the
- VERSION OF THE OPERATING SYSTEM
- you have. There are three machine types for different versions of
- SunOS. All are derived from Berkeley 4.2, meaning that you should
- use -opsystem=bsd4-2. Emacs 17 has run on all of them. You will
- need to use sun3 on Sun 2's running SunOS release 3.
-
- For SunOS release 4 on a Sun 3, use -machine=sun3 and
- -opsystem=sunos4. See the file share-lib/SUNBUG for how to solve
- problems caused by bugs in the "export" version of SunOS 4.
-NOTE-END */
-
-/* Say that the text segment of a.out includes the header;
- the header actually occupies the first few bytes of the text segment
- and is counted in hdr.a_text. */
-
-#define A_TEXT_OFFSET(HDR) sizeof (HDR)
-
-/* This is the offset of the executable's text, from the start of the file. */
-
-#define A_TEXT_SEEK(HDR) (N_TXTOFF (hdr) + sizeof (hdr))
-
-/* In case we are using floating point, work together with crt0.c. */
-
-#ifndef __GNUC__
-#define C_SWITCH_MACHINE -fsoft
-#endif
-
-/* This line is needed if you are linking with X windows
- and the library xlib was compiled to use the 68881.
- For maximum cleanliness, don't edit this file;
- instead, insert this line in config.h. */
-/* #define START_FILES crt0.o /usr/lib/Mcrt1.o */