src/s/aix4-2.h

   1 /*
   2 Copyright (C) 1999, 2001-2012  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 3 of the License, or
   9 (at your option) 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.  If not, see <http://www.gnu.org/licenses/>.  */
  18
  19 /* Define symbols to identify the version of Unix this is.
  20    Define all the symbols that apply correctly.  */
  21 #define USG                             /* System III, System V, etc */
  22 #define USG5
  23
  24 /* This symbol should be defined on AIX Version 3  ??????? */
  25 #ifndef _AIX
  26 #define _AIX
  27 #endif
  28
  29 /* In AIX, you allocate a pty by opening /dev/ptc to get the master side.
  30    To get the name of the slave side, you just ttyname() the master side.  */
  31 #define PTY_ITERATION int c; for (c = 0; !c ; c++)
  32 #define PTY_NAME_SPRINTF strcpy (pty_name, "/dev/ptc");
  33 #define PTY_TTY_NAME_SPRINTF strcpy (pty_name, ttyname (fd));
  34
  35 /* Define HAVE_PTYS if the system supports pty devices.  */
  36 #define HAVE_PTYS
  37
  38 /* Define HAVE_SOCKETS if system supports 4.2-compatible sockets.  */
  39 #define HAVE_SOCKETS
  40 \f
  41 /* Special items needed to make Emacs run on this system.  */
  42
  43 /* Perry Smith <pedz@ddivt1.austin.ibm.com> says these are correct.  */
  44 #define SIGNALS_VIA_CHARACTERS
  45
  46 /* Perry Smith <pedz@ddivt1.austin.ibm.com> says these are correct.  */
  47 #undef sigmask
  48
  49 #ifndef HAVE_LIBXMU
  50 /* Unfortunately without libXmu we cannot support EditRes.  */
  51 #define NO_EDITRES
  52 #endif
  53
  54 /* On AIX Emacs uses the gmalloc.c malloc implementation.  But given
  55    the way this system works, libc functions that return malloced
  56    memory use the libc malloc implementation. Calling xfree or
  57    xrealloc on the results of such functions results in a crash.
  58
  59    One solution for this could be to define SYSTEM_MALLOC in configure,
  60    but that does not currently work on this system.
  61
  62    It is possible to completely override the malloc implementation on
  63    AIX, but that involves putting the malloc functions in a shared
  64    library and setting the MALLOCTYPE environment variable to point to
  65    that shared library.
  66
  67    Emacs currently calls xrealloc on the results of get_current_dir name,
  68    to avoid a crash just use the Emacs implementation for that function.  */
  69 #define BROKEN_GET_CURRENT_DIR_NAME 1
  70
  71 /*** BUILD 9008 - FIONREAD problem still exists in X-Windows. ***/
  72 #define BROKEN_FIONREAD
  73 /* As we define BROKEN_FIONREAD, SIGIO will be undefined in systty.h.
  74    But, on AIX, SIGAIO, SIGPTY, and SIGPOLL are defined as SIGIO,
  75    which causes compilation error at init_signals in sysdep.c.  So, we
  76    define these macros so that syssignal.h detects them and undefine
  77    SIGAIO, SIGPTY and SIGPOLL.  */
  78 #define BROKEN_SIGAIO
  79 #define BROKEN_SIGPTY
  80 #define BROKEN_SIGPOLL
  81
  82 /* Conservative garbage collection has not been tested, so for now
  83    play it safe and stick with the old-fashioned way of marking.  */
  84 #define GC_MARK_STACK GC_USE_GCPROS_AS_BEFORE