1 /* machine description file for Elxsi machine (running enix).
2 Copyright (C) 1986, 1992 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with XEmacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 /* Synched up with: FSF 19.31. */
24 /* The following line tells the configuration script what sort of
25 operating system this machine is likely to run.
26 USUAL-OPSYS="usg5-2" */
28 /* This file was modified by Matt Crawford <matt@tank.uchicago.edu>
29 to work under Elxsi's 12.0 release of BSD unix. */
31 /* Now define a symbol for the cpu type, if your compiler
32 does not define it automatically:
33 vax, m68000, ns16000, pyramid, orion, tahoe and APOLLO
34 are the ones defined so far. */
40 /* Name of kernel load average variable */
43 #define LDAV_SYMBOL "avenrun"
45 /* Data type of load average, as read out of kmem. */
47 #define LOAD_AVE_TYPE double
49 /* Convert that into an integer that is 100 for a load average of 1.0 */
51 #define LOAD_AVE_CVT(x) (int) ((x) * 100.0)
53 /* Define CANNOT_DUMP on machines where unexec does not work.
54 Then the function dump-emacs will not be defined
55 and temacs will do (load "loadup") automatically unless told otherwise.
57 Earlier versions couldn't dump.
58 Changes for 12.0 release are in 19.1.
59 Dumping should work now. */
61 /* #define CANNOT_DUMP */
63 /* Define C_ALLOCA if this machine does not support a true alloca
64 and the one written in C should be used instead.
65 Define HAVE_ALLOCA to say that the system provides a properly
66 working alloca function and it should be used.
67 Define neither one if an assembler-language alloca
68 in the file alloca.s should be used. */
71 /*#define HAVE_ALLOCA */
73 /* Define NO_REMAP if memory segmentation makes it not work well
74 to change the boundary between the text section and data section
75 when Emacs is dumped. If you define this, the preloaded Lisp
76 code will not be sharable; but that's better than failing completely. */
79 /* This is a guess for an alternate solution to whatever
80 problem motivated defining _sobuf in sysdep,c with extern char *_sobuf. */
83 /* Address of start of text segment as loaded. */
85 #define TEXT_START 0x800
87 /* Tell crt0.c not to define environ. */
89 #define DONT_NEED_ENVIRON
91 /* The elxsi has no debugger, so might as well optimize instead
92 of trying to make a symbol table. */
94 #define C_DEBUG_SWITCH "-O"
96 /* Elxsi uses COFF under both Sys V and BSD environments */
100 #define ADJUST_EXEC_HEADER {\
101 extern int _init_brk;\
102 _init_brk = bss_start;\