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428
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1 /* RTPC machine dependent defines
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2 Copyright (C) 1986 Free Software Foundation, Inc.
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3
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4 This file is part of GNU Emacs.
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5
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6 GNU Emacs is free software; you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 2, or (at your option)
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9 any later version.
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10
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11 GNU Emacs is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with XEmacs; see the file COPYING. If not, write to
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18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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19 Boston, MA 02111-1307, USA. */
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20
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21 /* Synched up with: FSF 19.31. */
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22
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23 /* The following line tells the configuration script what sort of
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24 operating system this machine is likely to run.
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25 USUAL-OPSYS="bsd4-2" */
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26
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27 /* Define WORD_MACHINE if addresses and such have
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28 * to be corrected before they can be used as byte counts. */
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29
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30 #define WORD_MACHINE
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31
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32 /* Now define a symbol for the cpu type, if your compiler
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33 does not define it automatically. */
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34
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35 /* XEmacs change */
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36 #ifndef ibmrt
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37 #define ibmrt
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38 #endif
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39 #ifndef romp
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40 #define romp /* unfortunately old include files are hanging around. */
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41 #endif
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42
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43 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
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44 the bit field into an int. In other words, if bit fields
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45 are always unsigned.
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46
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47 If you use NO_UNION_TYPE, this flag does not matter. */
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48
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49 #define EXPLICIT_SIGN_EXTEND
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50
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51 /* Data type of load average, as read out of kmem. */
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52
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53 #define LOAD_AVE_TYPE double /* For AIS (sysV) */
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54
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55 /* Convert that into an integer that is 100 for a load average of 1.0 */
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56
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57 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0)
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58
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59 /* Define CANNOT_DUMP on machines where unexec does not work.
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60 Then the function dump-emacs will not be defined
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61 and temacs will do (load "loadup") automatically unless told otherwise. */
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62
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63 /* #define CANNOT_DUMP */
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64
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65 /* Define VIRT_ADDR_VARIES if the virtual addresses of
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66 pure and impure space as loaded can vary, and even their
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67 relative order cannot be relied on.
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68
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69 Otherwise Emacs assumes that text space precedes data space,
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70 numerically. */
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71
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72 #undef VIRT_ADDR_VARIES
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73
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74 /* Define C_ALLOCA if this machine does not support a true alloca
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75 and the one written in C should be used instead.
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76 Define HAVE_ALLOCA to say that the system provides a properly
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77 working alloca function and it should be used.
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78 Define neither one if an assembler-language alloca
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79 in the file alloca.s should be used. */
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80
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81 #define HAVE_ALLOCA
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82
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83 /* The data segment in this machine starts at a fixed address.
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84 An address of data cannot be stored correctly in a Lisp object;
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85 we always lose the high bits. We must tell XPNTR to add them back. */
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86
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87 #define DATA_SEG_BITS 0x10000000
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88 #define DATA_START 0x10000000
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89
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90 /* The text segment always starts at a fixed address.
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91 This way we don't need to have a label _start defined. */
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92 #define TEXT_START 0
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93
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94 /* Taking a pointer to a char casting it as int pointer */
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95 /* and then taking the int which the int pointer points to */
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96 /* is practically guaranteed to give erroneous results */
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97
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98 #define NEED_ERRNO
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99
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100 #define SKTPAIR
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101
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102 /* Special switches to give the C compiler. */
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103
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104 #ifndef __GNUC__
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105 #define C_SWITCH_MACHINE "-Dalloca=_Alloca"
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106 #endif
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107
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108 /* XEmacs addition: */
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109 /* Under Mach at least, gcc doesn't seem to work as the linker. */
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110 #ifdef MACH
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111 #define START_FILES "pre-crt0.o"
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112 #ifdef __GNUC__
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113 #define LINKER "pcc"
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114 #endif
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115 #endif
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116
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117 /* Don't attempt to relabel some of the data as text when dumping.
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118 It does not work because their virtual addresses are not consecutive.
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119 This enables us to use the standard crt0.o. */
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120
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121 #define NO_REMAP
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122
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123 /* Use the bitmap files that come with Emacs. */
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124 #define EMACS_BITMAP_FILES
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