src/m/vax.h

   1 /* machine description file for vax.
   2    Copyright (C) 1985, 1986, 2002 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Emacs.
   5
   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)
   9 any later version.
  10
  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.
  15
  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.  */
  20
  21
  22 /* The following line tells the configuration script what sort of
  23    operating system this machine is likely to run.
  24    USUAL-OPSYS="note"
  25
  26 NOTE-START
  27 The vax (-machine=vax) runs zillions of different operating systems.
  28
  29 Vax running Berkeley Unix (-opsystem=bsd4-1, -opsystem=bsd4-2 or
  30                            -opsystem=bsd4-3)
  31
  32   Works.
  33
  34 Vax running Ultrix (-opsystem=bsd4-2)
  35
  36   Works.  See under Ultrix in share-lib/MACHINES for problems using X
  37   windows on Ultrix.
  38
  39 Vax running System V rel 2 (-opsystem=usg5-2)
  40
  41   18.27 Works.
  42
  43 Vax running System V rel 0 (-opsystem=usg5-0)
  44
  45   Works as of 18.36.
  46
  47 Vax running VMS (-opsystem=vms)
  48
  49   18.36 believed to work.  Addition of features is necessary to make
  50   this Emacs version more usable.
  51
  52 NOTE-END  */
  53
  54 /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
  55    is the most significant byte.  */
  56
  57 #undef WORDS_BIG_ENDIAN
  58
  59 /* #define vax    -- appears to be done automatically  */
  60
  61 /* Use type int rather than a union, to represent Lisp_Object */
  62
  63 #define NO_UNION_TYPE
  64
  65 /* crt0.c should use the vax-bsd style of entry, with no dummy args.  */
  66
  67 #define CRT0_DUMMIES
  68
  69 /* crt0.c should define a symbol `start' and do .globl with a dot.  */
  70
  71 #define DOT_GLOBAL_START
  72
  73 #ifdef BSD_SYSTEM
  74 /* USG systems I know of running on Vaxes do not actually
  75    support the load average, so disable it for them.  */
  76
  77 /* Data type of load average, as read out of kmem.  */
  78
  79 #define LOAD_AVE_TYPE double
  80
  81 /* Convert that into an integer that is 100 for a load average of 1.0  */
  82
  83 #define LOAD_AVE_CVT(x) ((int) ((x) * 100.0))
  84
  85 #endif /* BSD_SYSTEM */
  86
  87 #ifdef VMS
  88
  89 /* Data type of load average, as read out of driver.  */
  90
  91 #define LOAD_AVE_TYPE float
  92
  93 /* Convert that into an integer that is 100 for a load average of 1.0  */
  94
  95 #define LOAD_AVE_CVT(x) ((int) ((x) * 100.0))
  96
  97 #endif /* VMS */
  98
  99 /* Vax sysV has alloca in the PW library.  */
 100
 101 #ifdef USG
 102 #define LIB_STANDARD -lPW -lc
 103
 104 /* There is some bug in unexec in for usg 5.2 on a vax
 105    which nobody who runs such a system has yet tracked down. */
 106 #ifndef USG5_0
 107 #define NO_REMAP
 108 #endif /* USG 5_0 */
 109
 110 #define TEXT_START 0
 111 #endif /* USG */
 112
 113 #ifdef BSD4_2
 114 #define HAVE_FTIME
 115 #endif