code.delx.au - gnu-emacs/blob - 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 1, 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_TIMEVAL if the system supports the BSD style clock values.
  60  *      Look in <sys/time.h> for a timeval structure.
  61  */
  62
  63 /* #define HAVE_TIMEVAL */
  64
  65 /*
  66  *      Define HAVE_SELECT if the system supports the `select' system call.
  67  */
  68
  69 /* #define HAVE_SELECT */
  70
  71 /*
  72  *      Define HAVE_PTYS if the system supports pty devices.
  73  */
  74
  75 /* #define HAVE_PTYS */
  76
  77 /* Define HAVE_SOCKETS if system supports 4.2-compatible sockets.  */
  78
  79 /* #define HAVE_SOCKETS */
  80
  81 /*
  82  *      Define NONSYSTEM_DIR_LIBRARY to make Emacs emulate
  83  *      The 4.2 opendir, etc., library functions.
  84  */
  85
  86 #define NONSYSTEM_DIR_LIBRARY
  87
  88 /* Define this symbol if your system has the functions bcopy, etc. */
  89
  90 /* #define BSTRING */
  91
  92 /* subprocesses should be defined if you want to
  93  have code for asynchronous subprocesses
  94  (as used in M-x compile and M-x shell).
  95  This is supposed to work now on system V release 2.  */
  96
  97 #define subprocesses
  98
  99 /* If your system uses COFF (Common Object File Format) then define the
 100    preprocessor symbol "COFF". */
 101
 102 #define COFF
 103
 104 /* define MAIL_USE_FLOCK if the mailer uses flock
 105    to interlock access to /usr/spool/mail/$USER.
 106    The alternative is that a lock file named
 107    /usr/spool/mail/$USER.lock.  */
 108
 109 /* #define MAIL_USE_FLOCK */
 110
 111 /* Define CLASH_DETECTION if you want lock files to be written
 112    so that Emacs can tell instantly when you try to modify
 113    a file that someone else has modified in his Emacs.  */
 114
 115 /* #define CLASH_DETECTION */
 116
 117 /* Define SHORTNAMES if the C compiler can distinguish only
 118    short names.  It means that the stuff in ../shortnames
 119    must be run to convert the long names to short ones.  */
 120
 121 #define SHORTNAMES
 122
 123 /* We do NOT use the Berkeley (and usg5.2.2) interface to nlist.  */
 124
 125 /* #define NLIST_STRUCT */
 126
 127 /* The file containing the kernel's symbol table is called /unix.  */
 128
 129 #define KERNEL_FILE "/unix"
 130
 131 /* The symbol in the kernel where the load average is found
 132    is named avenrun.  */
 133
 134 #define LDAV_SYMBOL "avenrun"
 135 \f
 136 /* Special hacks needed to make Emacs run on this system.  */
 137
 138 /*
 139  *      Make the sigsetmask function go away.  Don't know what the
 140  *      ramifications of this are, but doesn't seem possible to
 141  *      emulate it properly anyway at this point.
 142  */
 143
 144 #define sigsetmask(mask)        /* Null expansion */
 145
 146 /* setjmp and longjmp can safely replace _setjmp and _longjmp,
 147    but they will run slower.  */
 148
 149 #define _setjmp setjmp
 150 #define _longjmp longjmp
 151
 152 /* On USG systems the system calls are interruptable by signals
 153  that the user program has elected to catch.  Thus the system call
 154  must be retried in these cases.  To handle this without massive
 155  changes in the source code, we remap the standard system call names
 156  to names for our own functions in sysdep.c that do the system call
 157  with retries. */
 158
 159 #define read sys_read
 160 #define open sys_open
 161 #define write sys_write
 162
 163 #define INTERRUPTIBLE_OPEN
 164 #define INTERRUPTIBLE_IO
 165
 166 /* On USG systems these have different names */
 167
 168 #define index strchr
 169 #define rindex strrchr
 170
 171 /* USG systems tend to put everything declared static
 172    into the initialized data area, which becomes pure after dumping Emacs.
 173    Foil this.  Emacs carefully avoids static vars inside functions.  */
 174
 175 #define static
 176
 177 /* Compiler bug bites on many systems when default ADDR_CORRECT is used.  */
 178
 179 #define ADDR_CORRECT(x) (x)
 180
 181 /* Prevent -lg from being used for debugging.  Not implemented?  */
 182
 183 #define LIBS_DEBUG