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20c428fd JB |
1 | /* machine description file for the Plexus running System V.2. |
2 | Copyright (C) 1986 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 | |
17385adc | 8 | the Free Software Foundation; either version 2, or (at your option) |
20c428fd JB |
9 | 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; see the file COPYING. If not, write to | |
3b7ad313 EN |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
20c428fd JB |
20 | |
21 | ||
22 | /* The following line tells the configuration script what sort of | |
23 | operating system this machine is likely to run. | |
24 | USUAL-OPSYS="usg5-2" */ | |
25 | ||
74d3f806 KH |
26 | /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word |
27 | is the most significant byte. */ | |
28 | ||
29 | #define WORDS_BIG_ENDIAN | |
30 | ||
20c428fd JB |
31 | /* Define NO_ARG_ARRAY if you cannot take the address of the first of a |
32 | * group of arguments and treat it as an array of the arguments. */ | |
33 | ||
34 | #undef NO_ARG_ARRAY | |
35 | ||
36 | /* Define WORD_MACHINE if addresses and such have | |
37 | * to be corrected before they can be used as byte counts. */ | |
38 | ||
39 | #undef WORD_MACHINE | |
40 | ||
20c428fd JB |
41 | /* Now define a symbol for the cpu type, if your compiler |
42 | does not define it automatically: | |
43 | vax, m68000, ns16000, pyramid, orion, tahoe and APOLLO | |
44 | are the ones defined so far. */ | |
45 | /* Plexus predefines m68 instead of m68000. */ | |
46 | #define m68000 m68 | |
47 | ||
48 | /* Use type int rather than a union, to represent Lisp_Object */ | |
49 | /* This is desirable for most machines. */ | |
50 | ||
51 | #define NO_UNION_TYPE | |
52 | ||
53 | /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend | |
54 | the 24-bit bit field into an int. In other words, if bit fields | |
55 | are always unsigned. | |
56 | ||
57 | If you use NO_UNION_TYPE, this flag does not matter. */ | |
58 | ||
59 | #undef EXPLICIT_SIGN_EXTEND | |
60 | ||
61 | /* Data type of load average, as read out of kmem. */ | |
62 | ||
63 | #undef LOAD_AVE_TYPE | |
64 | ||
65 | /* Convert that into an integer that is 100 for a load average of 1.0 */ | |
66 | ||
67 | #undef LOAD_AVE_CVT | |
68 | ||
69 | /* Define CANNOT_DUMP on machines where unexec does not work. | |
70 | Then the function dump-emacs will not be defined | |
71 | and temacs will do (load "loadup") automatically unless told otherwise. */ | |
72 | ||
73 | #undef CANNOT_DUMP | |
74 | ||
75 | /* Define VIRT_ADDR_VARIES if the virtual addresses of | |
76 | pure and impure space as loaded can vary, and even their | |
77 | relative order cannot be relied on. | |
78 | ||
79 | Otherwise Emacs assumes that text space precedes data space, | |
80 | numerically. */ | |
81 | ||
82 | #undef VIRT_ADDR_VARIES | |
83 | ||
84 | /* Define C_ALLOCA if this machine does not support a true alloca | |
85 | and the one written in C should be used instead. | |
86 | Define HAVE_ALLOCA to say that the system provides a properly | |
87 | working alloca function and it should be used. | |
88 | Define neither one if an assembler-language alloca | |
89 | in the file alloca.s should be used. */ | |
90 | ||
91 | #undef C_ALLOCA | |
92 | #define HAVE_ALLOCA | |
93 | ||
94 | /* Define NO_REMAP if memory segmentation makes it not work well | |
95 | to change the boundary between the text section and data section | |
96 | when Emacs is dumped. If you define this, the preloaded Lisp | |
97 | code will not be sharable; but that's better than failing completely. */ | |
98 | ||
99 | #undef NO_REMAP | |
100 | ||
101 | /* Use the following on ld so we can use the gnu crt0 | |
102 | The plexus ld looks for start */ | |
103 | #define LD_SWITCH_MACHINE -e __start | |
104 | ||
105 | /* Use the PW library, which contains alloca. */ | |
106 | ||
107 | #define LIB_STANDARD -lPW -lc | |
108 | ||
109 | /* crt0.c should use the vax-bsd style of entry, with no dummy args. */ | |
110 | ||
111 | #define CRT0_DUMMIES zero1, zero2, | |
112 | ||
113 | /* This triggers some stuff to avoid a compiler bug */ | |
114 | ||
115 | #define TAHOE_REGISTER_BUG |