src/s/usg5-2.h

   1 /* Definitions file for GNU Emacs running on AT&T's System V Release 2.0
   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
  30 /* SYSTEM_TYPE should indicate the kind of system you are using.
  31  It sets the Lisp variable system-type.  */
  32
  33 #define SYSTEM_TYPE "usg-unix-v"
  34
  35 /* nomultiplejobs should be defined if your system's shell
  36  does not have "job control" (the ability to stop a program,
  37  run some other program, then continue the first one).  */
  38
  39 #define NOMULTIPLEJOBS
  40
  41 /* Default is to set interrupt_input to 0: don't do input buffering within Emacs */
  42
  43 /* #define INTERRUPT_INPUT */
  44
  45 /* Letter to use in finding device name of first pty,
  46   if system supports pty's.  'p' means it is /dev/ptyp0  */
  47
  48 #define FIRST_PTY_LETTER 'p'
  49
  50 /*
  51  *      Define HAVE_TERMIO if the system provides sysV-style ioctls
  52  *      for terminal control.
  53  */
  54
  55 #define HAVE_TERMIO
  56
  57 /*
  58  *      Define HAVE_TIMEVAL if the system supports the BSD style clock values.
  59  *      Look in <sys/time.h> for a timeval structure.
  60  */
  61
  62 /* #define HAVE_TIMEVAL */
  63
  64 /*
  65  *      Define HAVE_SELECT if the system supports the `select' system call.
  66  */
  67
  68 /* #define HAVE_SELECT */
  69
  70 /*
  71  *      Define HAVE_PTYS if the system supports pty devices.
  72  */
  73
  74 /* #define HAVE_PTYS */
  75
  76 /* Define HAVE_SOCKETS if system supports 4.2-compatible sockets.  */
  77
  78 /* #define HAVE_SOCKETS */
  79
  80 /*
  81  *      Define NONSYSTEM_DIR_LIBRARY to make Emacs emulate
  82  *      The 4.2 opendir, etc., library functions.
  83  */
  84
  85 #define NONSYSTEM_DIR_LIBRARY
  86
  87 /* Define this symbol if your system has the functions bcopy, etc. */
  88
  89 /* #define BSTRING */
  90
  91 /* subprocesses should be defined if you want to
  92  have code for asynchronous subprocesses
  93  (as used in M-x compile and M-x shell).
  94  This is supposed to work now on system V release 2.  */
  95
  96 #define subprocesses
  97
  98 /* If your system uses COFF (Common Object File Format) then define the
  99    preprocessor symbol "COFF". */
 100
 101 #define COFF
 102
 103 /* define MAIL_USE_FLOCK if the mailer uses flock
 104    to interlock access to /usr/spool/mail/$USER.
 105    The alternative is that a lock file named
 106    /usr/spool/mail/$USER.lock.  */
 107
 108 /* #define MAIL_USE_FLOCK */
 109
 110 /* Define CLASH_DETECTION if you want lock files to be written
 111    so that Emacs can tell instantly when you try to modify
 112    a file that someone else has modified in his Emacs.  */
 113
 114 /* #define CLASH_DETECTION */
 115
 116 /* Define SHORTNAMES if the C compiler can distinguish only
 117    short names.  It means that the stuff in ../shortnames
 118    must be run to convert the long names to short ones.  */
 119
 120 /* #define SHORTNAMES */
 121
 122 /* We do NOT use the Berkeley (and usg5.2.2) interface to nlist.  */
 123
 124 /* #define NLIST_STRUCT */
 125
 126 /* The file containing the kernel's symbol table is called /unix.  */
 127
 128 #define KERNEL_FILE "/unix"
 129
 130 /* The symbol in the kernel where the load average is found
 131    is named avenrun.  */
 132
 133 #define LDAV_SYMBOL "avenrun"
 134 \f
 135 /* Special hacks needed to make Emacs run on this system.  */
 136
 137 /*
 138  *      Make the sigsetmask function go away.  Don't know what the
 139  *      ramifications of this are, but doesn't seem possible to
 140  *      emulate it properly anyway at this point.
 141  */
 142
 143 #define sigsetmask(mask)        /* Null expansion */
 144
 145 /* setjmp and longjmp can safely replace _setjmp and _longjmp,
 146    but they will run slower.  */
 147
 148 #define _setjmp setjmp
 149 #define _longjmp longjmp
 150
 151 /* On USG systems the system calls are interruptable by signals
 152  that the user program has elected to catch.  Thus the system call
 153  must be retried in these cases.  To handle this without massive
 154  changes in the source code, we remap the standard system call names
 155  to names for our own functions in sysdep.c that do the system call
 156  with retries. */
 157
 158 #define read sys_read
 159 #define open sys_open
 160 #define write sys_write
 161
 162 #define INTERRUPTIBLE_OPEN
 163 #define INTERRUPTIBLE_IO
 164
 165 /* On USG systems these have different names */
 166
 167 #define index strchr
 168 #define rindex strrchr
 169
 170 /* USG systems tend to put everything declared static
 171    into the initialized data area, which becomes pure after dumping Emacs.
 172    Foil this.  Emacs carefully avoids static vars inside functions.  */
 173
 174 #define static
 175
 176 /* Compiler bug bites on many systems when default ADDR_CORRECT is used.  */
 177
 178 #define ADDR_CORRECT(x) (x)
 179
 180 /* Prevent -lg from being used for debugging.  Not implemented?  */
 181
 182 #define LIBS_DEBUG
 183
 184 /* Use terminfo instead of termcap.  */
 185
 186 #define TERMINFO