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 /* Now define a symbol for the cpu type, if your compiler
  31    does not define it automatically.
  32    Ones defined so far include m68k and many others */
  33
  34 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  35    the 24-bit bit field into an int.  In other words, if bit fields
  36    are always unsigned.
  37
  38    This flag only matters if you use USE_LISP_UNION_TYPE.  */
  39
  40 #define EXPLICIT_SIGN_EXTEND
  41
  42 /* Data type of load average, as read out of kmem.  */
  43
  44 #define LOAD_AVE_TYPE long
  45
  46 /* Convert that into an integer that is 100 for a load average of 1.0  */
  47
  48 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
  49
  50 /* Define CANNOT_DUMP on machines where unexec does not work.
  51    Then the function dump-emacs will not be defined
  52    and temacs will do (load "loadup") automatically unless told otherwise.  */
  53
  54 #define CANNOT_DUMP
  55
  56 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  57    pure and impure space as loaded can vary, and even their
  58    relative order cannot be relied on.
  59
  60    Otherwise Emacs assumes that text space precedes data space,
  61    numerically.  */
  62
  63 #define VIRT_ADDR_VARIES
  64
  65 /* Define NO_REMAP if memory segmentation makes it not work well
  66    to change the boundary between the text section and data section
  67    when Emacs is dumped.  If you define this, the preloaded Lisp
  68    code will not be sharable; but that's better than failing completely.  */
  69
  70 #define NO_REMAP
  71
  72 /* Some really obscure 4.2-based systems (like Sequent DYNIX)
  73  * do not support asynchronous I/O (using SIGIO) on sockets,
  74  * even though it works fine on tty's.  If you have one of
  75  * these systems, define the following, and then use it in
  76  * config.h (or elsewhere) to decide when (not) to use SIGIO.
  77  *
  78  * You'd think this would go in an operating-system description file,
  79  * but since it only occurs on some, but not all, BSD systems, the
  80  * reasonable place to select for it is in the machine description
  81  * file.
  82  */
  83
  84 #define NO_SOCK_SIGIO
  85
  86
  87 /* After adding support for a new system, modify the large case
  88    statement in the `configure' script to recognize reasonable
  89    configuration names, and add a description of the system to
  90    `etc/MACHINES'.
  91
  92    If you've just fixed a problem in an existing configuration file,
  93    you should also check `etc/MACHINES' to make sure its descriptions
  94    of known problems in that configuration should be updated.  */
  95
  96 /* arch-tag: d7dae0a9-4f99-4939-bef9-5738e1f33955
  97    (do not change this comment) */