root/trunk/src/m/ibmrt-aix.h

/* RTPC AIX machine/system dependent defines
   Copyright (C) 1988, 1999, 2001, 2002, 2003, 2004,
                 2005, 2006, 2007, 2008  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 3, 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="usg5-2-2"  */

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

#define WORDS_BIG_ENDIAN

/* Define NO_ARG_ARRAY if you cannot take the address of the first of a
 * group of arguments and treat it as an array of the arguments.  */

#define NO_ARG_ARRAY

/* Now define a symbol for the cpu type, if your compiler
   does not define it automatically.  */

#ifndef IBMAIX
#define IBMAIX
#endif

/* Use type int rather than a union, to represent Lisp_Object */
/* This is desirable for most machines.  */

#define NO_UNION_TYPE

/* No load average information appears in the AIX kernel.  VRM has this
   info, and if anyone desires they should fix fns.c to get it out of VRM */

/* Define CANNOT_DUMP on machines where unexec does not work.
   Then the function dump-emacs will not be defined
   and temacs will do (load "loadup") automatically unless told otherwise.  */

/* #define CANNOT_DUMP */

/* Define addresses, macros, change some setup for dump */

#undef COFF
#define NO_REMAP
#undef static
  /* Since NO_REMAP, problem with statics doesn't exist */

#define TEXT_START 0x10000000
#define TEXT_END 0
#define DATA_START 0x20000000
#define DATA_END 0

/* The data segment in this machine always starts at address 0x20000000.
   An address of data cannot be stored correctly in a Lisp object;
   we always lose the high bits.  We must tell XPNTR to add them back.  */

#define DATA_SEG_BITS 0x20000000

#define N_BADMAG(x) BADMAG(x)
#define N_TXTOFF(x) A_TEXTPOS(x)
#define N_SYMOFF(x) A_SYMPOS(x)
#define A_TEXT_OFFSET(HDR) sizeof(HDR)
#define ADJUST_EXEC_HEADER \
    unexec_text_start += sizeof(hdr); \
    unexec_data_start = ohdr.a_dbase
#undef ADDR_CORRECT
#define ADDR_CORRECT(x) ((int)(x))

/* This is the offset of the executable's text, from the start of the file.  */

#define A_TEXT_SEEK(HDR) (N_TXTOFF (hdr) + sizeof (hdr))

/* Define C_ALLOCA if this machine does not support a true alloca
   and the one written in C should be used instead.
   Define HAVE_ALLOCA to say that the system provides a properly
   working alloca function and it should be used.
   Define neither one if an assembler-language alloca
   in the file alloca.s should be used.  */

#define C_ALLOCA
#define STACK_DIRECTION -1 /* tell alloca.c which way it grows */

/* AIX has PTYs, so define here, along with macros needed to make them work. */

#define HAVE_PTYS
#define PTY_ITERATION for (i=0; i<256; i++)
#define PTY_NAME_SPRINTF sprintf (ptyname, "/dev/ptc%d", i);

#define PTY_TTY_NAME_SPRINTF                            \
{ /* Check that server side not already open */         \
  if ((ioctl (*ptyv, PTYSTATUS, 0) & 0xFFFF) != 0)      \
    {                                                   \
      emacs_close (*ptyv);                              \
      continue;                                         \
    }                                                   \
  /* And finally to be sure we can open it later */     \
  sprintf (ptyname, "/dev/pts%d", i);                   \
  signal (SIGHUP,SIG_IGN);                              \
}     /* ignore hangup at process end */

/* TIOCNOTTY doesn't occur on AIX, but the rest
   of the conditionalized code in process.c does
   the right thing if we fake this out.  */
#define TIOCNOTTY IOCTYPE

/* AIX has IPC. It also has sockets, and either can be used for client/server.
   I would suggest the client/server code be changed to use HAVE_SOCKETS rather
   than BSD_SYSTEM as the conditional if sockets provide any advantages. */

#define HAVE_SYSVIPC

/* AIX has sockets */

#define HAVE_SOCKETS
/* #define SKTPAIR */ /* SKTPAIR works, but what is advantage over pipes? */

/* Specify the font for X to use.  */

#define X_DEFAULT_FONT "Rom14.500"

/* Here override various assumptions in ymakefile */

/* On AIX 2.2.1, use these definitions instead
#define C_SWITCH_MACHINE -I/usr/include -Nn2000
#define LIBS_MACHINE -lX -lrts
*/

#define C_SWITCH_MACHINE -I/usr/include -I/usr/include/bsd -Nn2000
#define LIBS_MACHINE -lXMenu -lX -lsock -lbsd -lrts

#define OBJECTS_MACHINE hftctl.o
#define START_FILES /lib/crt0.o
/* -lXMenu, -lX must precede -lsock, -lbsd */
#define LD_SWITCH_MACHINE -n -T0x10000000 -K -e start

#if 0 /* I refuse to promulgate a recommendation that would make
         users unable to debug - RMS.  */
/* delete the following line to foil optimization, enable debugging */
#define C_DEBUG_SWITCH -O
#endif


/* Setup to do some things BSD way - these won't work previous to AIX 2.1.2 */

#include </usr/include/bsd/BSDtoAIX.h>
#define BSTRING

/* AIX utimes allegedly causes SIGSEGV.  */
#undef HAVE_UTIMES /* override configuration decision */

/* AIX defines FIONREAD, but it does not work.  */
#define BROKEN_FIONREAD

/* rocky@watson.ibm.com says this is needed.  */
#define HAVE_FTIME