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20c428fd | 1 | /* machine description file for the Plexus running System V.2. |
aaef169d TTN |
2 | Copyright (C) 1986, 2002, 2003, 2004, 2005, |
3 | 2006 Free Software Foundation, Inc. | |
20c428fd JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
17385adc | 9 | the Free Software Foundation; either version 2, or (at your option) |
20c428fd JB |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
364c38d3 LK |
19 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
20 | Boston, MA 02110-1301, USA. */ | |
20c428fd JB |
21 | |
22 | ||
177c0ea7 | 23 | /* The following line tells the configuration script what sort of |
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24 | operating system this machine is likely to run. |
25 | USUAL-OPSYS="usg5-2" */ | |
26 | ||
74d3f806 KH |
27 | /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word |
28 | is the most significant byte. */ | |
29 | ||
30 | #define WORDS_BIG_ENDIAN | |
31 | ||
20c428fd JB |
32 | /* Define NO_ARG_ARRAY if you cannot take the address of the first of a |
33 | * group of arguments and treat it as an array of the arguments. */ | |
34 | ||
35 | #undef NO_ARG_ARRAY | |
36 | ||
37 | /* Define WORD_MACHINE if addresses and such have | |
38 | * to be corrected before they can be used as byte counts. */ | |
39 | ||
40 | #undef WORD_MACHINE | |
41 | ||
20c428fd JB |
42 | /* Now define a symbol for the cpu type, if your compiler |
43 | does not define it automatically: | |
44 | vax, m68000, ns16000, pyramid, orion, tahoe and APOLLO | |
45 | are the ones defined so far. */ | |
46 | /* Plexus predefines m68 instead of m68000. */ | |
47 | #define m68000 m68 | |
48 | ||
49 | /* Use type int rather than a union, to represent Lisp_Object */ | |
50 | /* This is desirable for most machines. */ | |
51 | ||
52 | #define NO_UNION_TYPE | |
53 | ||
54 | /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend | |
55 | the 24-bit bit field into an int. In other words, if bit fields | |
56 | are always unsigned. | |
57 | ||
58 | If you use NO_UNION_TYPE, this flag does not matter. */ | |
59 | ||
60 | #undef EXPLICIT_SIGN_EXTEND | |
61 | ||
62 | /* Data type of load average, as read out of kmem. */ | |
63 | ||
64 | #undef LOAD_AVE_TYPE | |
65 | ||
66 | /* Convert that into an integer that is 100 for a load average of 1.0 */ | |
67 | ||
68 | #undef LOAD_AVE_CVT | |
69 | ||
70 | /* Define CANNOT_DUMP on machines where unexec does not work. | |
71 | Then the function dump-emacs will not be defined | |
72 | and temacs will do (load "loadup") automatically unless told otherwise. */ | |
73 | ||
74 | #undef CANNOT_DUMP | |
75 | ||
76 | /* Define VIRT_ADDR_VARIES if the virtual addresses of | |
77 | pure and impure space as loaded can vary, and even their | |
78 | relative order cannot be relied on. | |
79 | ||
80 | Otherwise Emacs assumes that text space precedes data space, | |
81 | numerically. */ | |
82 | ||
83 | #undef VIRT_ADDR_VARIES | |
84 | ||
20c428fd JB |
85 | /* Define NO_REMAP if memory segmentation makes it not work well |
86 | to change the boundary between the text section and data section | |
87 | when Emacs is dumped. If you define this, the preloaded Lisp | |
88 | code will not be sharable; but that's better than failing completely. */ | |
89 | ||
90 | #undef NO_REMAP | |
91 | ||
177c0ea7 | 92 | /* Use the following on ld so we can use the gnu crt0 |
20c428fd JB |
93 | The plexus ld looks for start */ |
94 | #define LD_SWITCH_MACHINE -e __start | |
95 | ||
96 | /* Use the PW library, which contains alloca. */ | |
97 | ||
98 | #define LIB_STANDARD -lPW -lc | |
99 | ||
100 | /* crt0.c should use the vax-bsd style of entry, with no dummy args. */ | |
101 | ||
102 | #define CRT0_DUMMIES zero1, zero2, | |
103 | ||
104 | /* This triggers some stuff to avoid a compiler bug */ | |
105 | ||
106 | #define TAHOE_REGISTER_BUG | |
ab5796a9 MB |
107 | |
108 | /* arch-tag: 78c607eb-b4f8-4750-b575-39670d979448 | |
109 | (do not change this comment) */ |