src/s/usg5-0.h

   1 /* Definitions file for GNU Emacs running on AT&T's System V.0
   2    Copyright (C) 1985, 1986 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Emacs.
   5
   6 GNU Emacs is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Emacs is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Emacs; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20
  21 /*
  22  *      Define symbols to identify the version of Unix this is.
  23  *      Define all the symbols that apply correctly.
  24  */
  25
  26 #define USG                             /* System III, System V, etc */
  27
  28 #define USG5
  29 #define USG5_0
  30
  31 /* SYSTEM_TYPE should indicate the kind of system you are using.
  32  It sets the Lisp variable system-type.  */
  33
  34 #define SYSTEM_TYPE "usg-unix-v"
  35
  36 /* nomultiplejobs should be defined if your system's shell
  37  does not have "job control" (the ability to stop a program,
  38  run some other program, then continue the first one).  */
  39
  40 #define NOMULTIPLEJOBS
  41
  42 /* Default is to set interrupt_input to 0: don't do input buffering within Emacs */
  43
  44 /* #define INTERRUPT_INPUT */
  45
  46 /* Letter to use in finding device name of first pty,
  47   if system supports pty's.  'p' means it is /dev/ptyp0  */
  48
  49 #define FIRST_PTY_LETTER 'p'
  50
  51 /*
  52  *      Define HAVE_TERMIO if the system provides sysV-style ioctls
  53  *      for terminal control.
  54  */
  55
  56 #define HAVE_TERMIO
  57
  58 /*
  59  *      Define HAVE_PTYS if the system supports pty devices.
  60  */
  61
  62 /* #define HAVE_PTYS */
  63
  64 /* Define HAVE_SOCKETS if system supports 4.2-compatible sockets.  */
  65
  66 /* #define HAVE_SOCKETS */
  67
  68 /*
  69  *      Define NONSYSTEM_DIR_LIBRARY to make Emacs emulate
  70  *      The 4.2 opendir, etc., library functions.
  71  */
  72
  73 #define NONSYSTEM_DIR_LIBRARY
  74
  75 /* Define this symbol if your system has the functions bcopy, etc. */
  76
  77 /* #define BSTRING */
  78
  79 /* subprocesses should be defined if you want to
  80  have code for asynchronous subprocesses
  81  (as used in M-x compile and M-x shell).
  82  This is supposed to work now on system V release 2.  */
  83
  84 #define subprocesses
  85
  86 /* If your system uses COFF (Common Object File Format) then define the
  87    preprocessor symbol "COFF". */
  88
  89 #define COFF
  90
  91 /* define MAIL_USE_FLOCK if the mailer uses flock
  92    to interlock access to /usr/spool/mail/$USER.
  93    The alternative is that a lock file named
  94    /usr/spool/mail/$USER.lock.  */
  95
  96 /* #define MAIL_USE_FLOCK */
  97
  98 /* Define CLASH_DETECTION if you want lock files to be written
  99    so that Emacs can tell instantly when you try to modify
 100    a file that someone else has modified in his Emacs.  */
 101
 102 /* #define CLASH_DETECTION */
 103
 104 /* Define SHORTNAMES if the C compiler can distinguish only
 105    short names.  It means that the stuff in ../shortnames
 106    must be run to convert the long names to short ones.  */
 107
 108 #define SHORTNAMES
 109
 110 /* We do NOT use the Berkeley (and usg5.2.2) interface to nlist.  */
 111
 112 /* #define NLIST_STRUCT */
 113
 114 /* The file containing the kernel's symbol table is called /unix.  */
 115
 116 #define KERNEL_FILE "/unix"
 117
 118 /* The symbol in the kernel where the load average is found
 119    is named avenrun.  */
 120
 121 #define LDAV_SYMBOL "avenrun"
 122 \f
 123 /* Special hacks needed to make Emacs run on this system.  */
 124
 125 /*
 126  *      Make the sigsetmask function go away.  Don't know what the
 127  *      ramifications of this are, but doesn't seem possible to
 128  *      emulate it properly anyway at this point.
 129  */
 130
 131 #define sigsetmask(mask)        /* Null expansion */
 132
 133 /* setjmp and longjmp can safely replace _setjmp and _longjmp,
 134    but they will run slower.  */
 135
 136 #define _setjmp setjmp
 137 #define _longjmp longjmp
 138
 139 /* On USG systems the system calls are interruptible by signals
 140  that the user program has elected to catch.  Thus the system call
 141  must be retried in these cases.  To handle this without massive
 142  changes in the source code, we remap the standard system call names
 143  to names for our own functions in sysdep.c that do the system call
 144  with retries. */
 145
 146 #define read sys_read
 147 #define open sys_open
 148 #define write sys_write
 149
 150 #define INTERRUPTIBLE_OPEN
 151 #define INTERRUPTIBLE_IO
 152
 153 /* On USG systems these have different names */
 154
 155 #define index strchr
 156 #define rindex strrchr
 157
 158 /* USG systems tend to put everything declared static
 159    into the initialized data area, which becomes pure after dumping Emacs.
 160    Foil this.  Emacs carefully avoids static vars inside functions.  */
 161
 162 #define static
 163
 164 /* Compiler bug bites on many systems when default ADDR_CORRECT is used.  */
 165
 166 #define ADDR_CORRECT(x) (x)
 167
 168 /* Prevent -lg from being used for debugging.  Not implemented?  */
 169
 170 #define LIBS_DEBUG