1 /* machine description file template.
2 Copyright (C) 1985, 1986, 2002, 2003, 2004,
3 2005, 2006 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 GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 Boston, MA 02110-1301, USA. */
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 s- or .h>" */
27 /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
28 is the most significant byte. */
30 #define WORDS_BIG_ENDIAN
32 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
33 * group of arguments and treat it as an array of the arguments. */
37 /* Define WORD_MACHINE if addresses and such have
38 * to be corrected before they can be used as byte counts. */
42 /* Now define a symbol for the cpu type, if your compiler
43 does not define it automatically:
44 Ones defined so far include vax, m68000, ns16000, pyramid,
45 orion, tahoe, APOLLO and many others */
47 /* Use type int rather than a union, to represent Lisp_Object */
48 /* This is desirable for most machines. */
52 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
53 the 24-bit bit field into an int. In other words, if bit fields
56 If you use NO_UNION_TYPE, this flag does not matter. */
58 #define EXPLICIT_SIGN_EXTEND
60 /* Data type of load average, as read out of kmem. */
62 #define LOAD_AVE_TYPE long
64 /* Convert that into an integer that is 100 for a load average of 1.0 */
66 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
68 /* Define CANNOT_DUMP on machines where unexec does not work.
69 Then the function dump-emacs will not be defined
70 and temacs will do (load "loadup") automatically unless told otherwise. */
74 /* Define VIRT_ADDR_VARIES if the virtual addresses of
75 pure and impure space as loaded can vary, and even their
76 relative order cannot be relied on.
78 Otherwise Emacs assumes that text space precedes data space,
81 #define VIRT_ADDR_VARIES
83 /* Define NO_REMAP if memory segmentation makes it not work well
84 to change the boundary between the text section and data section
85 when Emacs is dumped. If you define this, the preloaded Lisp
86 code will not be sharable; but that's better than failing completely. */
90 /* Some really obscure 4.2-based systems (like Sequent DYNIX)
91 * do not support asynchronous I/O (using SIGIO) on sockets,
92 * even though it works fine on tty's. If you have one of
93 * these systems, define the following, and then use it in
94 * config.h (or elsewhere) to decide when (not) to use SIGIO.
96 * You'd think this would go in an operating-system description file,
97 * but since it only occurs on some, but not all, BSD systems, the
98 * reasonable place to select for it is in the machine description
102 #define NO_SOCK_SIGIO
105 /* After adding support for a new system, modify the large case
106 statement in the `configure' script to recognize reasonable
107 configuration names, and add a description of the system to
110 If you've just fixed a problem in an existing configuration file,
111 you should also check `etc/MACHINES' to make sure its descriptions
112 of known problems in that configuration should be updated. */
114 /* arch-tag: d7dae0a9-4f99-4939-bef9-5738e1f33955
115 (do not change this comment) */