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 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, Inc., 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21
  22 /*
  23  *      Define symbols to identify the version of Unix this is.
  24  *      Define all the symbols that apply correctly.
  25  */
  26
  27 #define USG                             /* System III, System V, etc */
  28
  29 #define USG5
  30
  31 #define USG5_3
  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 "usg-unix-v"
  37
  38 /* nomultiplejobs should be defined if your system's shell
  39  does not have "job control" (the ability to stop a program,
  40  run some other program, then continue the first one).  */
  41
  42 #define NOMULTIPLEJOBS
  43
  44 /* Default is to set interrupt_input to 0: don't do input buffering within Emacs */
  45
  46 /* #define INTERRUPT_INPUT */
  47
  48 /* Letter to use in finding device name of first pty,
  49   if system supports pty's.  'p' means it is /dev/ptyp0  */
  50
  51 #define FIRST_PTY_LETTER 'p'
  52
  53 /*
  54  *      Define HAVE_TERMIO if the system provides sysV-style ioctls
  55  *      for terminal control.
  56  */
  57
  58 #define HAVE_TERMIO
  59
  60 /*
  61  *      Define HAVE_PTYS if the system supports pty devices.
  62  */
  63
  64 /* Some versions of V.3 have this, but not all.
  65    #define HAVE_PTYS
  66    #define SYSV_PTYS  */
  67
  68 /* Define HAVE_SOCKETS if system supports 4.2-compatible sockets.  */
  69
  70 /* #define HAVE_SOCKETS */
  71
  72 /*
  73  *      Define NONSYSTEM_DIR_LIBRARY to make Emacs emulate
  74  *      The 4.2 opendir, etc., library functions.
  75  */
  76
  77 /* #define NONSYSTEM_DIR_LIBRARY */
  78
  79 /*
  80  *      Define SYSV_SYSTEM_DIR to use the V.3 getdents/readir
  81  *      library functions.  Almost, but not quite the same as
  82  *      the 4.2 functions
  83  */
  84 #define SYSV_SYSTEM_DIR
  85
  86 /* Define this symbol if your system has the functions bcopy, etc. */
  87
  88 /* #define BSTRING */
  89
  90 /* subprocesses should be defined if you want to
  91  have code for asynchronous subprocesses
  92  (as used in M-x compile and M-x shell).
  93  This is supposed to work now on system V release 2.  */
  94
  95 #define subprocesses
  96
  97 /* If your system uses COFF (Common Object File Format) then define the
  98    preprocessor symbol "COFF". */
  99
 100 #define COFF
 101
 102 /* define MAIL_USE_FLOCK if the mailer uses flock
 103    to interlock access to /usr/spool/mail/$USER.
 104    The alternative is that a lock file named
 105    /usr/spool/mail/$USER.lock.  */
 106
 107 /* #define MAIL_USE_FLOCK */
 108
 109 /* Define CLASH_DETECTION if you want lock files to be written
 110    so that Emacs can tell instantly when you try to modify
 111    a file that someone else has modified in his Emacs.  */
 112
 113 /* #define CLASH_DETECTION */
 114
 115 /* Define SHORTNAMES if the C compiler can distinguish only
 116    short names.  It means that the stuff in ../shortnames
 117    must be run to convert the long names to short ones.  */
 118
 119 /* #define SHORTNAMES */
 120
 121 /* We use the Berkeley (and usg5.2.2) interface to nlist.  */
 122
 123 #define NLIST_STRUCT
 124
 125 /* The file containing the kernel's symbol table is called /unix.  */
 126
 127 #define KERNEL_FILE "/unix"
 128
 129 /* The symbol in the kernel where the load average is found
 130    is named avenrun.  */
 131
 132 #define LDAV_SYMBOL "avenrun"
 133
 134 /* Define this if system V IPC is available.  */
 135
 136 #define HAVE_SYSVIPC
 137
 138 /* Special hacks needed to make Emacs run on this system.  */
 139
 140 /*
 141  *      Make the sigsetmask function go away.  Don't know what the
 142  *      ramifications of this are, but doesn't seem possible to
 143  *      emulate it properly anyway at this point.
 144  */
 145
 146 #define sigsetmask(mask)        /* Null expansion */
 147
 148 /* setjmp and longjmp can safely replace _setjmp and _longjmp,
 149    but they will run slower.  */
 150
 151 #define _setjmp setjmp
 152 #define _longjmp longjmp
 153
 154 /* On USG systems the system calls are interruptible by signals
 155  that the user program has elected to catch.  Thus the system call
 156  must be retried in these cases.  To handle this without massive
 157  changes in the source code, we remap the standard system call names
 158  to names for our own functions in sysdep.c that do the system call
 159  with retries. */
 160
 161 #define read sys_read
 162 #define write sys_write
 163 #define open sys_open
 164 #define close sys_close
 165
 166 #define INTERRUPTIBLE_OPEN
 167 #define INTERRUPTIBLE_CLOSE
 168 #define INTERRUPTIBLE_IO
 169
 170 /* On USG systems these have different names */
 171 #define index strchr
 172 #define rindex strrchr
 173
 174 /* USG systems tend to put everything declared static
 175    into the initialized data area, which becomes pure after dumping Emacs.
 176    Foil this.  Emacs carefully avoids static vars inside functions.  */
 177
 178 #define static
 179
 180 /* Compiler bug bites on many systems when default ADDR_CORRECT is used.  */
 181
 182 #define ADDR_CORRECT(x) (x)
 183
 184 /* Use terminfo instead of termcap.  */
 185
 186 #define TERMINFO
 187
 188 /* Some variants have TIOCGETC, but the structures to go with it
 189    are not declared.  */
 190
 191 #define BROKEN_TIOCGETC
 192
 193 /* AT&T SVr3 X wants to be linked with shared libraries */
 194
 195 #define LIB_X11_LIB -lX11_s
 196
 197 /* X needs to talk on the network, so search the network library.  */
 198
 199 #define LIBX10_SYSTEM -lnsl_s
 200 #define LIBX11_SYSTEM -lpt -lnls -lnsl_s -lc_s
 201
 202 /* The docs for system V/386 suggest v.3 has sigpause,
 203    so let's give it a try.  */
 204 #define HAVE_SYSV_SIGPAUSE
 205
 206 /* Some variants have TIOCGWINSZ, but the structures to go with it
 207    are not declared.  */
 208
 209 #define BROKEN_TIOCGWINSZ
 210
 211 /* If we're using the System V X port, BSD bstring functions will be handy */
 212
 213 #ifdef HAVE_X_WINDOWS
 214 #define BSTRING
 215 #endif /* HAVE_X_WINDOWS */
 216
 217 /* Enable support for shared libraries in unexec.  */
 218
 219 #define USG_SHARED_LIBRARIES
 220
 221 /* On USG systems signal handlers return void */
 222
 223 #define SIGTYPE void