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1.1 root 1: /* m- 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
8: the Free Software Foundation; either version 1, or (at your option)
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
18: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
19:
20:
21: /* The following three symbols give information on
22: the size of various data types. */
23:
24: #define SHORTBITS 16 /* Number of bits in a short */
25:
26: #define INTBITS 32 /* Number of bits in an int */
27:
28: #define LONGBITS 32 /* Number of bits in a long */
29:
30: /* Define BIG_ENDIAN iff lowest-numbered byte in a word
31: is the most significant byte. */
32:
33: #define BIG_ENDIAN
34:
35: /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
36: * group of arguments and treat it as an array of the arguments. */
37:
38: #undef NO_ARG_ARRAY
39:
40: /* Define WORD_MACHINE if addresses and such have
41: * to be corrected before they can be used as byte counts. */
42:
43: #undef WORD_MACHINE
44:
45: /* Define how to take a char and sign-extend into an int.
46: On machines where char is signed, this is a no-op. */
47:
48: #define SIGN_EXTEND_CHAR(c) (c)
49:
50: /* Now define a symbol for the cpu type, if your compiler
51: does not define it automatically:
52: vax, m68000, ns16000, pyramid, orion, tahoe and APOLLO
53: are the ones defined so far. */
54: /* Plexus predefines m68 instead of m68000. */
55: #define m68000 m68
56:
57: /* Use type int rather than a union, to represent Lisp_Object */
58: /* This is desirable for most machines. */
59:
60: #define NO_UNION_TYPE
61:
62: /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
63: the 24-bit bit field into an int. In other words, if bit fields
64: are always unsigned.
65:
66: If you use NO_UNION_TYPE, this flag does not matter. */
67:
68: #undef EXPLICIT_SIGN_EXTEND
69:
70: /* Data type of load average, as read out of kmem. */
71:
72: #undef LOAD_AVE_TYPE
73:
74: /* Convert that into an integer that is 100 for a load average of 1.0 */
75:
76: #undef LOAD_AVE_CVT
77:
78: /* Define CANNOT_DUMP on machines where unexec does not work.
79: Then the function dump-emacs will not be defined
80: and temacs will do (load "loadup") automatically unless told otherwise. */
81:
82: #undef CANNOT_DUMP
83:
84: /* Define VIRT_ADDR_VARIES if the virtual addresses of
85: pure and impure space as loaded can vary, and even their
86: relative order cannot be relied on.
87:
88: Otherwise Emacs assumes that text space precedes data space,
89: numerically. */
90:
91: #undef VIRT_ADDR_VARIES
92:
93: /* Define C_ALLOCA if this machine does not support a true alloca
94: and the one written in C should be used instead.
95: Define HAVE_ALLOCA to say that the system provides a properly
96: working alloca function and it should be used.
97: Define neither one if an assembler-language alloca
98: in the file alloca.s should be used. */
99:
100: #undef C_ALLOCA
101: #define HAVE_ALLOCA
102:
103: /* Define NO_REMAP if memory segmentation makes it not work well
104: to change the boundary between the text section and data section
105: when Emacs is dumped. If you define this, the preloaded Lisp
106: code will not be sharable; but that's better than failing completely. */
107:
108: #undef NO_REMAP
109:
110: /* Use the following on ld so we can use the gnu crt0
111: The plexus ld looks for start */
112: #define LD_SWITCH_MACHINE -e __start
113:
114: /* Use the PW library, which contains alloca. */
115:
116: #define LIB_STANDARD -lPW -lc
117:
118: /* crt0.c should use the vax-bsd style of entry, with no dummy args. */
119:
120: #define CRT0_DUMMIES zero1, zero2,
121:
122: /* This triggers some stuff to avoid a compiler bug */
123:
124: #define TAHOE_REGISTER_BUG
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