src/m/vax.h

   1 /* machine description file for vax.
   2    Copyright (C) 1985, 1986, 2001, 2002, 2003, 2004,
   3                  2005, 2006, 2007  Free Software Foundation, Inc.
   4
   5 This file is part of GNU Emacs.
   6
   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)
  10 any later version.
  11
  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.
  16
  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.  */
  21
  22
  23 /* The following line tells the configuration script what sort of
  24    operating system this machine is likely to run.
  25    USUAL-OPSYS="note"
  26
  27 NOTE-START
  28 The vax (-machine=vax) runs zillions of different operating systems.
  29
  30 Vax running Berkeley Unix (-opsystem=bsd4-1, -opsystem=bsd4-2 or
  31                            -opsystem=bsd4-3)
  32
  33   Works.
  34
  35 Vax running Ultrix (-opsystem=bsd4-2)
  36
  37   Works.  See under Ultrix in share-lib/MACHINES for problems using X
  38   windows on Ultrix.
  39
  40 Vax running System V rel 2 (-opsystem=usg5-2)
  41
  42   18.27 Works.
  43
  44 Vax running System V rel 0 (-opsystem=usg5-0)
  45
  46   Works as of 18.36.
  47
  48 Vax running VMS (-opsystem=vms)
  49
  50   18.36 believed to work.  Addition of features is necessary to make
  51   this Emacs version more usable.
  52
  53 NOTE-END  */
  54
  55 /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
  56    is the most significant byte.  */
  57
  58 #undef WORDS_BIG_ENDIAN
  59
  60 /* #define vax    -- appears to be done automatically  */
  61
  62 /* Use type int rather than a union, to represent Lisp_Object */
  63
  64 #define NO_UNION_TYPE
  65
  66 /* crt0.c should use the vax-bsd style of entry, with no dummy args.  */
  67
  68 #define CRT0_DUMMIES
  69
  70 /* crt0.c should define a symbol `start' and do .globl with a dot.  */
  71
  72 #define DOT_GLOBAL_START
  73
  74 #ifdef BSD_SYSTEM
  75 /* USG systems I know of running on Vaxes do not actually
  76    support the load average, so disable it for them.  */
  77
  78 /* Data type of load average, as read out of kmem.  */
  79
  80 #define LOAD_AVE_TYPE double
  81
  82 /* Convert that into an integer that is 100 for a load average of 1.0  */
  83
  84 #define LOAD_AVE_CVT(x) ((int) ((x) * 100.0))
  85
  86 #endif /* BSD_SYSTEM */
  87
  88 #ifdef VMS
  89
  90 /* Data type of load average, as read out of driver.  */
  91
  92 #define LOAD_AVE_TYPE float
  93
  94 /* Convert that into an integer that is 100 for a load average of 1.0  */
  95
  96 #define LOAD_AVE_CVT(x) ((int) ((x) * 100.0))
  97
  98 #endif /* VMS */
  99
 100 /* Vax sysV has alloca in the PW library.  */
 101
 102 #ifdef USG
 103 #define LIB_STANDARD -lPW -lc
 104
 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. */
 107 #ifndef USG5_0
 108 #define NO_REMAP
 109 #endif /* USG 5_0 */
 110
 111 #define TEXT_START 0
 112 #endif /* USG */
 113
 114 #ifdef BSD4_2
 115 #define HAVE_FTIME
 116 #endif
 117
 118 /* arch-tag: 508bdf7a-01a0-4ce0-8eba-0704d0df55a0
 119    (do not change this comment) */