src/m/pmax.h

   1 /* Machine description file for DEC MIPS machines.
   2
   3    Copyright (C) 1992, 1999, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
   4                  2008  Free Software Foundation, Inc.
   5
   6 This file is part of GNU Emacs.
   7
   8 GNU Emacs is free software: you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation, either version 3 of the License, or
  11 (at your option) any later version.
  12
  13 GNU Emacs is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21
  22 #include "mips.h"
  23
  24 /* The following line tells the configuration script what sort of
  25    operating system this machine is likely to run.
  26    USUAL-OPSYS="note"
  27
  28 NOTE-START
  29 The operating system would be either osf1, ultrix, or NetBSD.
  30 NOTE-END  */
  31
  32 #ifndef __MIPSEB__
  33 #undef WORDS_BIG_ENDIAN
  34 #endif
  35 #if defined (__NetBSD__)
  36 #define BROKEN_NOCOMBRELOC
  37 #else
  38 #undef LIB_STANDARD
  39 #undef START_FILES
  40 #endif
  41 #undef COFF
  42 #undef TERMINFO
  43 #define MAIL_USE_FLOCK
  44 #define HAVE_UNION_WAIT
  45
  46
  47 #ifdef MACH
  48 #define START_FILES pre-crt0.o /usr/lib/crt0.o
  49 #else
  50 #if !defined (__NetBSD__)
  51 /* This line starts being needed with ultrix 4.0.  */
  52 /* You must delete it for version 3.1.  */
  53 #define START_FILES pre-crt0.o /usr/lib/cmplrs/cc/crt0.o
  54 #endif
  55 #endif
  56
  57 /* Supposedly the following will overcome a kernel bug.  */
  58 #undef LD_SWITCH_MACHINE
  59 #undef DATA_START
  60 #define DATA_START 0x10000000
  61 #define DATA_SEG_BITS 0x10000000
  62
  63 #if 0
  64 /* I don't see any such conflict in Ultrix 4.2, 4.2a, or 4.3.  And
  65    the relocating allocator is a real win.  -JimB  */
  66
  67 /* In Ultrix 4.1, XvmsAlloc.o in libX11.a seems to insist
  68    on defining malloc itself.  This should avoid conflicting with it.  */
  69 #define SYSTEM_MALLOC
  70 #endif
  71
  72 /* Override what mips.h says about this.  */
  73 #if !defined (__NetBSD__)
  74 #undef LINKER
  75 #endif
  76
  77 #ifdef ultrix
  78 /* Ultrix 4.2 (perhaps also 4.1) implements O_NONBLOCK
  79    but it doesn't work right;
  80    and it causes hanging in read_process_output.  */
  81 #define BROKEN_O_NONBLOCK
  82 #endif
  83
  84 #ifndef __NetBSD__
  85 /* mcc@timessqr.gc.cuny.edu says this makes Emacs work with DECnet.  */
  86 #ifdef HAVE_LIBDNET
  87 #define LIBS_MACHINE -ldnet
  88 #endif
  89
  90 /* mcc@timessqr.gc.cuny.edu says it is /vmunix on Ultrix 4.2a.  */
  91 #undef KERNEL_FILE
  92 #define KERNEL_FILE "/vmunix"
  93 #endif
  94
  95 #ifdef ultrix
  96 /* Jim Wilson writes:
  97    [...] The X11 include files that Dec distributes with Ultrix
  98    are bogus.
  99
 100    When __STDC__ is defined (which is true with gcc), the X11 include files
 101    try to define prototypes.  The prototypes however use types which haven't
 102    been defined yet, and thus we get syntax/parse errors.
 103
 104    You can not fix this by changing the include files, because the prototypes
 105    create circular dependencies, in particular Xutil.h depends on types defined
 106    in Xlib.h, and Xlib.h depends on types defined in Xutil.h.  So, no matter
 107    which order you try to include them in, it will still fail.
 108
 109    Compiling with -DNeedFunctionPrototypes=0 will solve the problem by
 110    directly inhibiting the bad prototypes.  This could perhaps just be put in
 111    an a Ultrix configuration file.
 112
 113    Using the MIT X11 distribution instead of the one provided by Dec will
 114    also solve the problem, but I doubt you can convince everyone to do this. */
 115 /* Addendum: the MIT X11 distribution neglects to define certain symbols
 116    when NeedFunctionPrototypes is 0, but still tries to use them when
 117    NeedVarargsPrototypes is 1 (which is its default value).  So if we're
 118    going to disable non-variadic prototypes, we also need to disable
 119    variadic prototypes.  --kwzh@gnu.ai.mit.edu */
 120 #define C_SWITCH_X_MACHINE -DNeedFunctionPrototypes=0 -DNeedVarargsPrototypes=0
 121 #endif
 122
 123 /* Enable a fix in process.c.  */
 124 #define SET_CHILD_PTY_PGRP
 125
 126 /* arch-tag: 45d5070e-d2b7-479f-b336-3fd497c36e15
 127    (do not change this comment) */