src/s/template.h

   1 /* Template for system description header files.
   2    This file describes the parameters that system description files
   3    should define or not.
   4
   5 Copyright (C) 1985-1986, 1992, 1999, 2001-2011  Free Software Foundation, Inc.
   6
   7 This file is part of GNU Emacs.
   8
   9 GNU Emacs is free software: you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation, either version 3 of the License, or
  12 (at your option) any later version.
  13
  14 GNU Emacs is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
  21
  22
  23 /* Define symbols to identify the version of Unix this is.
  24    Define all the symbols that apply correctly.  */
  25
  26 /* #define USG5 */
  27 /* #define USG */
  28 /* #define HPUX */
  29 /* #define BSD4_2 */
  30 /* #define BSD4_3 */
  31 /* #define BSD_SYSTEM */
  32
  33 /* SYSTEM_TYPE should indicate the kind of system you are using.
  34    It sets the Lisp variable system-type.  */
  35
  36 #define SYSTEM_TYPE "berkeley-unix"
  37
  38 /* Emacs can read input using SIGIO and buffering characters itself,
  39    or using CBREAK mode and making C-g cause SIGINT.
  40    The choice is controlled by the variable interrupt_input.
  41
  42    Define INTERRUPT_INPUT to make interrupt_input = 1 the default (use SIGIO)
  43
  44    Emacs uses the presence or absence of the SIGIO and BROKEN_SIGIO macros
  45    to indicate whether or not signal-driven I/O is possible.  It uses
  46    INTERRUPT_INPUT to decide whether to use it by default.
  47
  48    SIGIO can be used only on systems that implement it (4.2 and 4.3).
  49    CBREAK mode has two disadvantages
  50      1) At least in 4.2, it is impossible to handle the Meta key properly.
  51         I hear that in system V this problem does not exist.
  52      2) Control-G causes output to be discarded.
  53         I do not know whether this can be fixed in system V.
  54
  55    Another method of doing input is planned but not implemented.
  56    It would have Emacs fork off a separate process
  57    to read the input and send it to the true Emacs process
  58    through a pipe.  */
  59 #define INTERRUPT_INPUT
  60
  61 /* Letter to use in finding device name of first pty,
  62    if system supports pty's.  'a' means it is /dev/ptya0.  */
  63 #define FIRST_PTY_LETTER 'a'
  64
  65 /* Define HAVE_PTYS if the system supports pty devices.  */
  66 #define HAVE_PTYS
  67
  68 /* subprocesses should be undefined if you do NOT want to
  69    have code for asynchronous subprocesses
  70    (as used in M-x compile and M-x shell).
  71    Currently only MSDOS does not support this.  */
  72
  73 /* #undef subprocesses */
  74
  75 /* Define CLASH_DETECTION if you want lock files to be written
  76    so that Emacs can tell instantly when you try to modify
  77    a file that someone else has modified in his Emacs.  */
  78 #define CLASH_DETECTION
  79
  80 /* Define this if your operating system declares signal handlers to
  81    have a type other than the usual.  `The usual' is `void' for ANSI C
  82    systems (i.e. when the __STDC__ macro is defined), and `int' for
  83    pre-ANSI systems.  If you're using GCC on an older system, __STDC__
  84    will be defined, but the system's include files will still say that
  85    signal returns int or whatever; in situations like that, define
  86    this to be what the system's include files want.  */
  87 /* #define SIGTYPE int */
  88
  89 /* If the character used to separate elements of the executable path
  90    is not ':', #define this to be the appropriate character constant.  */
  91 /* #define SEPCHAR ':' */
  92
  93 /* ============================================================ */
  94
  95 /* Here, add any special hacks needed to make Emacs work on this
  96    system.  For example, you might define certain system call names
  97    that don't exist on your system, or that do different things on
  98    your system and must be used only through an encapsulation (which
  99    you should place, by convention, in sysdep.c).  */
 100
 101 /* If the system's imake configuration file defines `NeedWidePrototypes'
 102    as `NO', we must define NARROWPROTO manually.  Such a define is
 103    generated in the Makefile generated by `xmkmf'.  If we don't
 104    define NARROWPROTO, we will see the wrong function prototypes
 105    for X functions taking float or double parameters.  */
 106
 107 /*  #define NARROWPROTO 1 */
 108
 109 /* ============================================================ */
 110
 111 /* After adding support for a new system, modify the large case
 112    statement in configure.in to recognize reasonable
 113    configuration names, and add a description of the system to
 114    `etc/MACHINES'.
 115
 116    Check for any tests of $opsys in configure.in, and add an entry
 117    for the new system if needed.
 118
 119    If you've just fixed a problem in an existing configuration file,
 120    you should also check `etc/MACHINES' to make sure its descriptions
 121    of known problems in that configuration should be updated.  */
 122