src/m/vax.h

   1 /* machine description file for vax.
   2    Copyright (C) 1985, 1986, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
   3                  2008  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 3 of the License, or
  10 (at your option) 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.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20
  21 /* The following line tells the configuration script what sort of
  22    operating system this machine is likely to run.
  23    USUAL-OPSYS="note"
  24
  25 NOTE-START
  26 The vax (-machine=vax) runs zillions of different operating systems.
  27
  28 Vax running Berkeley Unix (-opsystem=bsd4-1, -opsystem=bsd4-2 or
  29                            -opsystem=bsd4-3)
  30
  31   Works.
  32
  33 Vax running Ultrix (-opsystem=bsd4-2)
  34
  35   Works.  See under Ultrix in share-lib/MACHINES for problems using X
  36   windows on Ultrix.
  37
  38 Vax running System V rel 2 (-opsystem=usg5-2)
  39
  40   18.27 Works.
  41
  42 Vax running System V rel 0 (-opsystem=usg5-0)
  43
  44   Works as of 18.36.
  45
  46 Vax running VMS (-opsystem=vms)
  47
  48   18.36 believed to work.  Addition of features is necessary to make
  49   this Emacs version more usable.
  50
  51 NOTE-END  */
  52
  53 /* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
  54    is the most significant byte.  */
  55
  56 #undef WORDS_BIG_ENDIAN
  57
  58 /* #define vax    -- appears to be done automatically  */
  59
  60 /* Use type int rather than a union, to represent Lisp_Object */
  61
  62 #define NO_UNION_TYPE
  63
  64 /* crt0.c should use the vax-bsd style of entry, with no dummy args.  */
  65
  66 #define CRT0_DUMMIES
  67
  68 /* crt0.c should define a symbol `start' and do .globl with a dot.  */
  69
  70 #define DOT_GLOBAL_START
  71
  72 #ifdef BSD_SYSTEM
  73 /* USG systems I know of running on Vaxes do not actually
  74    support the load average, so disable it for them.  */
  75
  76 /* Data type of load average, as read out of kmem.  */
  77
  78 #define LOAD_AVE_TYPE double
  79
  80 /* Convert that into an integer that is 100 for a load average of 1.0  */
  81
  82 #define LOAD_AVE_CVT(x) ((int) ((x) * 100.0))
  83
  84 #endif /* BSD_SYSTEM */
  85
  86 #ifdef VMS
  87
  88 /* Data type of load average, as read out of driver.  */
  89
  90 #define LOAD_AVE_TYPE float
  91
  92 /* Convert that into an integer that is 100 for a load average of 1.0  */
  93
  94 #define LOAD_AVE_CVT(x) ((int) ((x) * 100.0))
  95
  96 #endif /* VMS */
  97
  98 /* Vax sysV has alloca in the PW library.  */
  99
 100 #ifdef USG
 101 #define LIB_STANDARD -lPW -lc
 102
 103 /* There is some bug in unexec in for usg 5.2 on a vax
 104    which nobody who runs such a system has yet tracked down. */
 105 #ifndef USG5_0
 106 #define NO_REMAP
 107 #endif /* USG 5_0 */
 108
 109 #define TEXT_START 0
 110 #endif /* USG */
 111
 112 #ifdef BSD4_2
 113 #define HAVE_FTIME
 114 #endif
 115
 116 /* arch-tag: 508bdf7a-01a0-4ce0-8eba-0704d0df55a0
 117    (do not change this comment) */