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From: karl@haddock.ISC.COM (Karl Heuer)
Newsgroups: comp.emacs
Subject: Re: GNU exists on IBM RT running AIX
Message-ID: <775@haddock.ISC.COM>
Date: Tue, 21-Jul-87 20:06:15 EDT
Article-I.D.: haddock.775
Posted: Tue Jul 21 20:06:15 1987
Date-Received: Thu, 23-Jul-87 06:46:38 EDT
References: <640@haddock.UUCP> <711@haddock.ISC.COM> <721@haddock.ISC.COM>
Reply-To: karl@haddock.ima.isc.com (Karl Heuer)
Distribution: world
Organization: Interactive Systems, Boston
Lines: 198
Summary: Part 3: src/s-aix.h

This is s-aix.h, the third installment of the AIX patches.  I chose to make a
new s- file rather than using s-usg5-2-2.h and hacking config.h; there seemed
to be enough differences to justify calling it a separate flavor of UNIX.  I
defined the cpp symbol USG because it is a SysV derivative, and also defined
the symbol AIX for more specific testing.  The lisp variable system-type is
set to 'aix, which may or may not be a good idea.

Old versions of AIX don't have a select system call.  (You can check for it by
typing "ar t /lib/libc.a select.o".)  If you don't have it, you should turn
off HAVE_SELECT.  Do this in config.h (see next posting), not s-aix.h.

If you do have select, make sure it isn't being clobbered by the bogus select
in libcurses.  To test this, type "cd /tmp; ar x /usr/lib/libcurses.a select.o
&& size select.o"; if you get a non-zero result you have a problem.  You
should get rid of the bogus routine with "ar d /usr/lib/libcurses.a select.o"
if you have root permission, otherwise just make a local copy of libcurses and
hack the Makefile to load it instead of the one in /usr/lib.

Karl W. Z. Heuer (ima!haddock!karl or karl@haddock.isc.com), The Walking Lint
---- cut here ----
#!/bin/sh
cat <<\EOF >s-aix.h
/* Definitions file for GNU Emacs running on AIX
   Copyright (C) 1985, 1986 Free Software Foundation, Inc.

This file is part of GNU Emacs.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY.  No author or distributor
accepts responsibility to anyone for the consequences of using it
or for whether it serves any particular purpose or works at all,
unless he says so in writing.  Refer to the GNU Emacs General Public
License for full details.

Everyone is granted permission to copy, modify and redistribute
GNU Emacs, but only under the conditions described in the
GNU Emacs General Public License.   A copy of this license is
supposed to have been given to you along with GNU Emacs so you
can know your rights and responsibilities.  It should be in a
file named COPYING.  Among other things, the copyright notice
and this notice must be preserved on all copies.  */


/*
 *	Define symbols to identify the version of Unix this is.
 *	Define all the symbols that apply correctly.
 */

#define	AIX
#define USG				/* Close enough */
#define USG5

/* SYSTEM_TYPE should indicate the kind of system you are using.
 It sets the Lisp variable system-type.  */

#define SYSTEM_TYPE "aix"

/* nomultiplejobs should be defined if your system's shell
 does not have "job control" (the ability to stop a program,
 run some other program, then continue the first one).  */

#define NOMULTIPLEJOBS

/* Default is to set interrupt_input to 0: don't do input buffering within Emacs */

/* #define INTERRUPT_INPUT */

/* Letter to use in finding device name of first pty,
  if system supports pty's.  'p' means it is /dev/ptyp0  */

#define FIRST_PTY_LETTER 'p'

/*
 *	Define HAVE_TERMIO if the system provides sysV-style ioctls
 *	for terminal control.
 */

#define HAVE_TERMIO

/*
 *	Define HAVE_TIMEVAL if the system supports the BSD style clock values.
 *	Look in  for a timeval structure.
 */

/* #define HAVE_TIMEVAL */
 
/*
 *	Define HAVE_SELECT if the system supports the `select' system call.
 */

#define HAVE_SELECT

/*
 *	Define HAVE_PTYS if the system supports pty devices.
 */

/* #define HAVE_PTYS */

/* Define HAVE_SOCKETS if system supports 4.2-compatible sockets.  */

/* #define HAVE_SOCKETS */

/*
 *	Define NONSYSTEM_DIR_LIBRARY to make Emacs emulate
 *      The 4.2 opendir, etc., library functions.
 */

#define NONSYSTEM_DIR_LIBRARY

/* Define this symbol if your system has the functions bcopy, etc. */

#define BSTRING	/* we can emulate them as follows: */
#define	bcopy(src, dst, len)	(void)memcpy(dst, src, len)
#define	bzero(buf, len)		(void)memset(buf, '\0', len)
#define	bcmp			memcmp

/* subprocesses should be defined if you want to
 have code for asynchronous subprocesses
 (as used in M-x compile and M-x shell).
 This is supposed to work now on system V release 2.  */

#define subprocesses

/* If your system uses COFF (Common Object File Format) then define the
   preprocessor symbol "COFF". */

#define	GPOFF	/* This is almost like COFF */

/* define MAIL_USE_FLOCK if the mailer uses flock
   to interlock access to /usr/spool/mail/$USER.
   The alternative is that a lock file named
   /usr/spool/mail/$USER.lock.  */

/* #define MAIL_USE_FLOCK */

/* Define CLASH_DETECTION if you want lock files to be written
   so that Emacs can tell instantly when you try to modify
   a file that someone else has modified in his Emacs.  */

/* #define CLASH_DETECTION */

/* Define SHORTNAMES if the C compiler can distinguish only
   short names.  It means that the stuff in ../shortnames
   must be run to convert the long names to short ones.  */

/* #define SHORTNAMES */

/* We use the Berkeley (and usg5.2.2) interface to nlist.  */

#define NLIST_STRUCT

/* The file containing the kernel's symbol table is called /unix.  */

#define KERNEL_FILE "/unix"

/* The symbol in the kernel where the load average is found
   is named avenrun.  */

#define LDAV_SYMBOL "avenrun"

/* Special hacks needed to make Emacs run on this system.  */

/* setjmp and longjmp can safely replace _setjmp and _longjmp,
   but they will run slower.  */

#define _setjmp setjmp
#define _longjmp longjmp

/* On USG-based systems the system calls are interruptable by signals
 that the user program has elected to catch.  Thus the system call
 must be retried in these cases.  To handle this without massive
 changes in the source code, we remap the standard system call names
 to names for our own functions in sysdep.c that do the system call
 with retries. */

#define read sys_read
#define open sys_open
#define write sys_write

#define INTERRUPTABLE_OPEN
#define INTERRUPTABLE_IO

/* On USG-based systems these have different names */

#define index strchr
#define rindex strrchr

/* AIX handles static bss correctly */
/* #define static */

/* Either this definition or the default should generate the same code */
#define ADDR_CORRECT(x) (x)

/* Use terminfo instead of termcap.  */

#define TERMINFO
EOF
exit 0