vax.h   [plain text]


/* machine description file for vax.
   Copyright (C) 1985, 1986, 2001, 2002, 2003, 2004,
                 2005, 2006, 2007  Free Software Foundation, Inc.

This file is part of GNU Emacs.

GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.  */


/* The following line tells the configuration script what sort of
   operating system this machine is likely to run.
   USUAL-OPSYS="note"

NOTE-START
The vax (-machine=vax) runs zillions of different operating systems.

Vax running Berkeley Unix (-opsystem=bsd4-1, -opsystem=bsd4-2 or
			   -opsystem=bsd4-3)

  Works.

Vax running Ultrix (-opsystem=bsd4-2)

  Works.  See under Ultrix in share-lib/MACHINES for problems using X
  windows on Ultrix.

Vax running System V rel 2 (-opsystem=usg5-2)

  18.27 Works.

Vax running System V rel 0 (-opsystem=usg5-0)

  Works as of 18.36.

Vax running VMS (-opsystem=vms)

  18.36 believed to work.  Addition of features is necessary to make
  this Emacs version more usable.

NOTE-END  */

/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
   is the most significant byte.  */

#undef WORDS_BIG_ENDIAN

/* #define vax    -- appears to be done automatically  */

/* Use type int rather than a union, to represent Lisp_Object */

#define NO_UNION_TYPE

/* crt0.c should use the vax-bsd style of entry, with no dummy args.  */

#define CRT0_DUMMIES

/* crt0.c should define a symbol `start' and do .globl with a dot.  */

#define DOT_GLOBAL_START

#ifdef BSD_SYSTEM
/* USG systems I know of running on Vaxes do not actually
   support the load average, so disable it for them.  */

/* Data type of load average, as read out of kmem.  */

#define LOAD_AVE_TYPE double

/* Convert that into an integer that is 100 for a load average of 1.0  */

#define LOAD_AVE_CVT(x) ((int) ((x) * 100.0))

#endif /* BSD_SYSTEM */

#ifdef VMS

/* Data type of load average, as read out of driver.  */

#define LOAD_AVE_TYPE float

/* Convert that into an integer that is 100 for a load average of 1.0  */

#define LOAD_AVE_CVT(x) ((int) ((x) * 100.0))

#endif /* VMS */

/* Vax sysV has alloca in the PW library.  */

#ifdef USG
#define LIB_STANDARD -lPW -lc

/* There is some bug in unexec in for usg 5.2 on a vax
   which nobody who runs such a system has yet tracked down. */
#ifndef USG5_0
#define NO_REMAP
#endif /* USG 5_0 */

#define TEXT_START 0
#endif /* USG */

#ifdef BSD4_2
#define HAVE_FTIME
#endif

/* arch-tag: 508bdf7a-01a0-4ce0-8eba-0704d0df55a0
   (do not change this comment) */