src/m/template.h

   1 /* machine description file template.
   2    Copyright (C) 1985, 1986, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
   3                  2008, 2009, 2010  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="<name of system .h file here, without the s- or .h>"  */
  24
  25 /* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
  26    is the most significant byte.  */
  27
  28 #define WORDS_BIG_ENDIAN
  29
  30 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  31  * group of arguments and treat it as an array of the arguments.  */
  32
  33 #define NO_ARG_ARRAY
  34
  35 /* Now define a symbol for the cpu type, if your compiler
  36    does not define it automatically.
  37    Ones defined so far include m68k and many others */
  38
  39 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  40    the 24-bit bit field into an int.  In other words, if bit fields
  41    are always unsigned.
  42
  43    This flag only matters if you use USE_LISP_UNION_TYPE.  */
  44
  45 #define EXPLICIT_SIGN_EXTEND
  46
  47 /* Data type of load average, as read out of kmem.  */
  48
  49 #define LOAD_AVE_TYPE long
  50
  51 /* Convert that into an integer that is 100 for a load average of 1.0  */
  52
  53 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
  54
  55 /* Define CANNOT_DUMP on machines where unexec does not work.
  56    Then the function dump-emacs will not be defined
  57    and temacs will do (load "loadup") automatically unless told otherwise.  */
  58
  59 #define CANNOT_DUMP
  60
  61 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  62    pure and impure space as loaded can vary, and even their
  63    relative order cannot be relied on.
  64
  65    Otherwise Emacs assumes that text space precedes data space,
  66    numerically.  */
  67
  68 #define VIRT_ADDR_VARIES
  69
  70 /* Define NO_REMAP if memory segmentation makes it not work well
  71    to change the boundary between the text section and data section
  72    when Emacs is dumped.  If you define this, the preloaded Lisp
  73    code will not be sharable; but that's better than failing completely.  */
  74
  75 #define NO_REMAP
  76
  77 /* Some really obscure 4.2-based systems (like Sequent DYNIX)
  78  * do not support asynchronous I/O (using SIGIO) on sockets,
  79  * even though it works fine on tty's.  If you have one of
  80  * these systems, define the following, and then use it in
  81  * config.h (or elsewhere) to decide when (not) to use SIGIO.
  82  *
  83  * You'd think this would go in an operating-system description file,
  84  * but since it only occurs on some, but not all, BSD systems, the
  85  * reasonable place to select for it is in the machine description
  86  * file.
  87  */
  88
  89 #define NO_SOCK_SIGIO
  90
  91
  92 /* After adding support for a new system, modify the large case
  93    statement in the `configure' script to recognize reasonable
  94    configuration names, and add a description of the system to
  95    `etc/MACHINES'.
  96
  97    If you've just fixed a problem in an existing configuration file,
  98    you should also check `etc/MACHINES' to make sure its descriptions
  99    of known problems in that configuration should be updated.  */
 100
 101 /* arch-tag: d7dae0a9-4f99-4939-bef9-5738e1f33955
 102    (do not change this comment) */