1 /* machine description file for vax.
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 GNU Emacs; 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. */
22 /* The following line tells the configuration script what sort of
23 operating system this machine is likely to run.
27 The vax (-machine=vax) runs zillions of different operating systems.
29 Vax running Berkeley Unix (-opsystem=bsd4-1, -opsystem=bsd4-2 or
34 Vax running Ultrix (-opsystem=bsd4-2)
36 Works. See under Ultrix in share-lib/MACHINES for problems using X
39 Vax running System V rel 2 (-opsystem=usg5-2)
43 Vax running System V rel 0 (-opsystem=usg5-0)
47 Vax running VMS (-opsystem=vms)
49 18.36 believed to work. Addition of features is necessary to make
50 this Emacs version more usable.
54 /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
55 is the most significant byte. */
57 #undef WORDS_BIG_ENDIAN
59 /* #define vax -- appears to be done automatically */
61 /* Use type int rather than a union, to represent Lisp_Object */
65 /* crt0.c should use the vax-bsd style of entry, with no dummy args. */
69 /* crt0.c should define a symbol `start' and do .globl with a dot. */
71 #define DOT_GLOBAL_START
74 /* USG systems I know of running on Vaxes do not actually
75 support the load average, so disable it for them. */
77 /* Data type of load average, as read out of kmem. */
79 #define LOAD_AVE_TYPE double
81 /* Convert that into an integer that is 100 for a load average of 1.0 */
83 #define LOAD_AVE_CVT(x) ((int) ((x) * 100.0))
89 /* Data type of load average, as read out of driver. */
91 #define LOAD_AVE_TYPE float
93 /* Convert that into an integer that is 100 for a load average of 1.0 */
95 #define LOAD_AVE_CVT(x) ((int) ((x) * 100.0))
99 /* Vax sysV has alloca in the PW library. */
102 #define LIB_STANDARD -lPW -lc
105 /* There is some bug in unexec in for usg 5.2 on a vax
106 which nobody who runs such a system has yet tracked down. */