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, 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 #define USG5_3
  31
  32 /* SYSTEM_TYPE should indicate the kind of system you are using.
  33  It sets the Lisp variable system-type.  */
  34
  35 #define SYSTEM_TYPE "usg-unix-v"
  36
  37 /* nomultiplejobs should be defined if your system's shell
  38  does not have "job control" (the ability to stop a program,
  39  run some other program, then continue the first one).  */
  40
  41 #define NOMULTIPLEJOBS
  42
  43 /* Default is to set interrupt_input to 0: don't do input buffering within Emacs */
  44
  45 /* #define INTERRUPT_INPUT */
  46
  47 /* Letter to use in finding device name of first pty,
  48   if system supports pty's.  'p' means it is /dev/ptyp0  */
  49
  50 #define FIRST_PTY_LETTER 'p'
  51
  52 /*
  53  *      Define HAVE_TERMIO if the system provides sysV-style ioctls
  54  *      for terminal control.
  55  */
  56
  57 #define HAVE_TERMIO
  58
  59 /*
  60  *      Define HAVE_TIMEVAL if the system supports the BSD style clock values.
  61  *      Look in <sys/time.h> for a timeval structure.
  62  */
  63
  64 /* #define HAVE_TIMEVAL */
  65
  66 /*
  67  *      Define HAVE_SELECT if the system supports the `select' system call.
  68  */
  69
  70 /* SVr3.2 ports of X include an emulation of select in the libraries.  */
  71 #ifdef HAVE_X_WINDOWS
  72 #define HAVE_SELECT
  73 #endif
  74
  75 /*
  76  *      Define HAVE_PTYS if the system supports pty devices.
  77  */
  78
  79 /* Some versions of V.3 have this, but not all.
  80    #define HAVE_PTYS
  81    #define SYSV_PTYS  */
  82
  83 /* Define HAVE_SOCKETS if system supports 4.2-compatible sockets.  */
  84
  85 /* #define HAVE_SOCKETS */
  86
  87 /*
  88  *      Define NONSYSTEM_DIR_LIBRARY to make Emacs emulate
  89  *      The 4.2 opendir, etc., library functions.
  90  */
  91
  92 /* #define NONSYSTEM_DIR_LIBRARY */
  93
  94 /*
  95  *      Define SYSV_SYSTEM_DIR to use the V.3 getdents/readir
  96  *      library functions.  Almost, but not quite the same as
  97  *      the 4.2 functions
  98  */
  99 #define SYSV_SYSTEM_DIR
 100
 101 /* Define this symbol if your system has the functions bcopy, etc. */
 102
 103 /* #define BSTRING */
 104
 105 /* subprocesses should be defined if you want to
 106  have code for asynchronous subprocesses
 107  (as used in M-x compile and M-x shell).
 108  This is supposed to work now on system V release 2.  */
 109
 110 #define subprocesses
 111
 112 /* If your system uses COFF (Common Object File Format) then define the
 113    preprocessor symbol "COFF". */
 114
 115 #define COFF
 116
 117 /* define MAIL_USE_FLOCK if the mailer uses flock
 118    to interlock access to /usr/spool/mail/$USER.
 119    The alternative is that a lock file named
 120    /usr/spool/mail/$USER.lock.  */
 121
 122 /* #define MAIL_USE_FLOCK */
 123
 124 /* Define CLASH_DETECTION if you want lock files to be written
 125    so that Emacs can tell instantly when you try to modify
 126    a file that someone else has modified in his Emacs.  */
 127
 128 /* #define CLASH_DETECTION */
 129
 130 /* Define SHORTNAMES if the C compiler can distinguish only
 131    short names.  It means that the stuff in ../shortnames
 132    must be run to convert the long names to short ones.  */
 133
 134 /* #define SHORTNAMES */
 135
 136 /* We use the Berkeley (and usg5.2.2) interface to nlist.  */
 137
 138 #define NLIST_STRUCT
 139
 140 /* The file containing the kernel's symbol table is called /unix.  */
 141
 142 #define KERNEL_FILE "/unix"
 143
 144 /* The symbol in the kernel where the load average is found
 145    is named avenrun.  */
 146
 147 #define LDAV_SYMBOL "avenrun"
 148
 149 /* Define this if system V IPC is available.  */
 150
 151 #define HAVE_SYSVIPC
 152
 153 /* Special hacks needed to make Emacs run on this system.  */
 154
 155 /*
 156  *      Make the sigsetmask function go away.  Don't know what the
 157  *      ramifications of this are, but doesn't seem possible to
 158  *      emulate it properly anyway at this point.
 159  */
 160
 161 #define sigsetmask(mask)        /* Null expansion */
 162
 163 /* setjmp and longjmp can safely replace _setjmp and _longjmp,
 164    but they will run slower.  */
 165
 166 #define _setjmp setjmp
 167 #define _longjmp longjmp
 168
 169 /* On USG systems the system calls are interruptible by signals
 170  that the user program has elected to catch.  Thus the system call
 171  must be retried in these cases.  To handle this without massive
 172  changes in the source code, we remap the standard system call names
 173  to names for our own functions in sysdep.c that do the system call
 174  with retries. */
 175
 176 #define read sys_read
 177 #define write sys_write
 178 #define open sys_open
 179 #define close sys_close
 180
 181 #define INTERRUPTIBLE_OPEN
 182 #define INTERRUPTIBLE_CLOSE
 183 #define INTERRUPTIBLE_IO
 184
 185 /* On USG systems these have different names */
 186 #define index strchr
 187 #define rindex strrchr
 188
 189 /* USG systems tend to put everything declared static
 190    into the initialized data area, which becomes pure after dumping Emacs.
 191    Foil this.  Emacs carefully avoids static vars inside functions.  */
 192
 193 #define static
 194
 195 /* Compiler bug bites on many systems when default ADDR_CORRECT is used.  */
 196
 197 #define ADDR_CORRECT(x) (x)
 198
 199 /* Use terminfo instead of termcap.  */
 200
 201 #define TERMINFO
 202
 203 /* Some variants have TIOCGETC, but the structures to go with it
 204    are not declared.  */
 205
 206 #define BROKEN_TIOCGETC
 207
 208 /* AT&T SVr3 X wants to be linked with shared libraries */
 209
 210 #define LIB_X11_LIB -lX11_s
 211
 212 /* X needs to talk on the network, so search the network library.  */
 213
 214 #define LIBX10_SYSTEM -lnsl_s
 215 #define LIBX11_SYSTEM -lpt -lnls -lnsl_s -lc_s
 216
 217 /* The docs for system V/386 suggest v.3 has sigpause,
 218    so let's give it a try.  */
 219 #define HAVE_SYSV_SIGPAUSE
 220
 221 /* Some variants have TIOCGWINSZ, but the structures to go with it
 222    are not declared.  */
 223
 224 #define BROKEN_TIOCGWINSZ
 225
 226 /* SVr3 does not have utimes(2) */
 227
 228 #define USE_UTIME
 229
 230 /* If we're using the System V X port, BSD bstring functions will be handy */
 231
 232 #ifdef HAVE_X_WINDOWS
 233 #define BSTRING
 234 #endif /* HAVE_X_WINDOWS */
 235
 236 /* Enable support for shared libraries in unexec.  */
 237
 238 #define USG_SHARED_LIBRARIES
 239
 240 /* On USG systems signal handlers return void */
 241
 242 #define SIGTYPE void