1 /* machine description file template.
2 Copyright (C) 1985, 1986 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
6 GNU Emacs is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU Emacs is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with XEmacs; see the file COPYING. If not, write to
18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 /* Synched up with: FSF 19.31. */
23 /* The following line tells the configuration script what sort of
24 operating system this machine is likely to run.
25 USUAL-OPSYS="<name of system .h file here, without the .h>" */
27 /* Now define a symbol for the cpu type, if your compiler
28 does not define it automatically:
29 Ones defined so far include vax, m68000, ns16000, pyramid,
30 orion, tahoe, APOLLO and many others */
32 /* Data type of load average, as read out of kmem. */
34 #define LOAD_AVE_TYPE long
36 /* Convert that into an integer that is 100 for a load average of 1.0 */
38 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
40 /* Define CANNOT_DUMP on machines where unexec does not work.
41 Then the function dump-emacs will not be defined
42 and temacs will do (load "loadup") automatically unless told otherwise. */
46 /* Define VIRT_ADDR_VARIES if the virtual addresses of
47 pure and impure space as loaded can vary, and even their
48 relative order cannot be relied on.
50 Otherwise Emacs assumes that text space precedes data space,
53 #define VIRT_ADDR_VARIES
55 /* Define C_ALLOCA if this machine does not support a true alloca
56 and the one written in C should be used instead.
57 Define HAVE_ALLOCA to say that the system provides a properly
58 working alloca function and it should be used.
59 Define neither one if an assembler-language alloca
60 in the file alloca.s should be used. */
65 /* Define NO_REMAP if memory segmentation makes it not work well
66 to change the boundary between the text section and data section
67 when Emacs is dumped. If you define this, the preloaded Lisp
68 code will not be sharable; but that's better than failing completely. */
72 /* Some really obscure 4.2-based systems (like Sequent DYNIX)
73 * do not support asynchronous I/O (using SIGIO) on sockets,
74 * even though it works fine on tty's. If you have one of
75 * these systems, define the following, and then use it in
76 * config.h (or elsewhere) to decide when (not) to use SIGIO.
78 * You'd think this would go in an operating-system description file,
79 * but since it only occurs on some, but not all, BSD systems, the
80 * reasonable place to select for it is in the machine description
87 /* After adding support for a new system, modify the large case
88 statement in the `configure' script to recognize reasonable
89 configuration names, and add a description of the system to
92 If you've just fixed a problem in an existing configuration file,
93 you should also check `etc/MACHINES' to make sure its descriptions
94 of known problems in that configuration should be updated. */