code.delx.au - gnu-emacs/blob - src/s/usg5-3.h

   1 /* Definitions file for GNU Emacs running on AT&T's System V Release 3
   2    Copyright (C) 1987 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 /* Some versions of V.3 have this, but not all.
  75    #define HAVE_PTYS
  76    #define SYSV_PTYS  */
  77
  78 /* Define HAVE_SOCKETS if system supports 4.2-compatible sockets.  */
  79
  80 /* #define HAVE_SOCKETS */
  81
  82 /*
  83  *      Define NONSYSTEM_DIR_LIBRARY to make Emacs emulate
  84  *      The 4.2 opendir, etc., library functions.
  85  */
  86
  87 /* #define NONSYSTEM_DIR_LIBRARY */
  88
  89 /*
  90  *      Define SYSV_SYSTEM_DIR to use the V.3 getdents/readir
  91  *      library functions.  Almost, but not quite the same as
  92  *      the 4.2 functions
  93  */
  94 #define SYSV_SYSTEM_DIR
  95
  96 /* Define this symbol if your system has the functions bcopy, etc. */
  97
  98 /* #define BSTRING */
  99
 100 /* subprocesses should be defined if you want to
 101  have code for asynchronous subprocesses
 102  (as used in M-x compile and M-x shell).
 103  This is supposed to work now on system V release 2.  */
 104
 105 #define subprocesses
 106
 107 /* If your system uses COFF (Common Object File Format) then define the
 108    preprocessor symbol "COFF". */
 109
 110 #define COFF
 111
 112 /* define MAIL_USE_FLOCK if the mailer uses flock
 113    to interlock access to /usr/spool/mail/$USER.
 114    The alternative is that a lock file named
 115    /usr/spool/mail/$USER.lock.  */
 116
 117 /* #define MAIL_USE_FLOCK */
 118
 119 /* Define CLASH_DETECTION if you want lock files to be written
 120    so that Emacs can tell instantly when you try to modify
 121    a file that someone else has modified in his Emacs.  */
 122
 123 /* #define CLASH_DETECTION */
 124
 125 /* Define SHORTNAMES if the C compiler can distinguish only
 126    short names.  It means that the stuff in ../shortnames
 127    must be run to convert the long names to short ones.  */
 128
 129 /* #define SHORTNAMES */
 130
 131 /* We use the Berkeley (and usg5.2.2) interface to nlist.  */
 132
 133 #define NLIST_STRUCT
 134
 135 /* The file containing the kernel's symbol table is called /unix.  */
 136
 137 #define KERNEL_FILE "/unix"
 138
 139 /* The symbol in the kernel where the load average is found
 140    is named avenrun.  */
 141
 142 #define LDAV_SYMBOL "avenrun"
 143
 144 /* Define this if system V IPC is available.  */
 145
 146 #define HAVE_SYSVIPC
 147 \f
 148 /* Special hacks needed to make Emacs run on this system.  */
 149
 150 /*
 151  *      Make the sigsetmask function go away.  Don't know what the
 152  *      ramifications of this are, but doesn't seem possible to
 153  *      emulate it properly anyway at this point.
 154  */
 155
 156 #define sigsetmask(mask)        /* Null expansion */
 157
 158 /* setjmp and longjmp can safely replace _setjmp and _longjmp,
 159    but they will run slower.  */
 160
 161 #define _setjmp setjmp
 162 #define _longjmp longjmp
 163
 164 /* On USG systems the system calls are interruptable by signals
 165  that the user program has elected to catch.  Thus the system call
 166  must be retried in these cases.  To handle this without massive
 167  changes in the source code, we remap the standard system call names
 168  to names for our own functions in sysdep.c that do the system call
 169  with retries. */
 170
 171 #define read sys_read
 172 #define write sys_write
 173 #define open sys_open
 174 #define close sys_close
 175
 176 #define INTERRUPTIBLE_OPEN
 177 #define INTERRUPTIBLE_CLOSE
 178 #define INTERRUPTIBLE_IO
 179
 180 /* On USG systems these have different names */
 181
 182 #define index strchr
 183 #define rindex strrchr
 184
 185 /* USG systems tend to put everything declared static
 186    into the initialized data area, which becomes pure after dumping Emacs.
 187    Foil this.  Emacs carefully avoids static vars inside functions.  */
 188
 189 #define static
 190
 191 /* Compiler bug bites on many systems when default ADDR_CORRECT is used.  */
 192
 193 #define ADDR_CORRECT(x) (x)
 194
 195 /* Prevent -lg from being used for debugging.  Not implemented?  */
 196
 197 #define LIBS_DEBUG
 198
 199 /* Use terminfo instead of termcap.  */
 200
 201 #define TERMINFO
 202
 203 /* X needs to talk on the network, so search the network library.  */
 204
 205 #define LIBX10_SYSTEM -lnsl_s
 206 #define LIBX11_SYSTEM -lnsl_s
 207
 208 /* Some variants have TIOCGETC, but the structures to go with it
 209    are not declared.  */
 210
 211 #define BROKEN_TIOCGETC
 212
 213 /* Enable support for shared libraries in unexec.  */
 214
 215 #define USG_SHARED_LIBRARIES
 216
 217 /* On USG systems signal handlers return void */
 218
 219 #define SIGTYPE void
 220