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23b0668c | 1 | /* Machine description file for intel 386. |
429ab54e | 2 | Copyright (C) 1987, 2001, 2002, 2003, 2004, 2005, |
49c1c3cc | 3 | 2006, 2007, 2008 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 | |
4a9f99bd | 9 | the Free Software Foundation; either version 3, 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 |
20c428fd JB |
24 | operating system this machine is likely to run. |
25 | USUAL-OPSYS="note" | |
26 | ||
27 | NOTE-START | |
f3041af1 | 28 | Intel 386 (-machine=intel386) |
20c428fd JB |
29 | |
30 | The possibilities for -opsystem are: bsd4-2, usg5-2-2, usg5-3, | |
f3041af1 | 31 | isc2-2, 386-ix, and linux. |
20c428fd JB |
32 | |
33 | 18.58 should support a wide variety of operating systems. | |
34 | Use isc2-2 for Interactive 386/ix version 2.2. | |
35 | Use 386ix for prior versions. | |
b2aaf43a JB |
36 | Use linux for Linux. |
37 | It isn't clear what to do on an SCO system. | |
20c428fd JB |
38 | |
39 | -machine=is386 is used for an Integrated Solutions 386 machine. | |
40 | It may also be correct for Microport systems. | |
41 | ||
42 | Cubix QBx/386 (-machine=intel386 -opsystem=usg5-3) | |
43 | ||
44 | Changes merged in 19.1. Systems before 2/A/0 may fail to compile etags.c | |
45 | due to a compiler bug. | |
46 | ||
47 | Prime EXL (-machine=intel386 -opsystem=usg5-3) | |
48 | ||
49 | Minor changes merged in 19.1. | |
50 | NOTE-END */ | |
51 | ||
22e9fe24 | 52 | /* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word |
74d3f806 KH |
53 | is the most significant byte. */ |
54 | ||
55 | #undef WORDS_BIG_ENDIAN | |
56 | ||
20c428fd JB |
57 | /* Define NO_ARG_ARRAY if you cannot take the address of the first of a |
58 | * group of arguments and treat it as an array of the arguments. */ | |
59 | ||
60 | /* #define NO_ARG_ARRAY */ | |
61 | ||
62 | /* Define WORD_MACHINE if addresses and such have | |
63 | * to be corrected before they can be used as byte counts. */ | |
64 | ||
65 | /* #define WORD_MACHINE */ | |
66 | ||
20c428fd JB |
67 | /* Now define a symbol for the cpu type, if your compiler |
68 | does not define it automatically: | |
69 | Ones defined so far include vax, m68000, ns16000, pyramid, | |
70 | orion, tahoe, APOLLO and many others */ | |
71 | ||
72 | #define INTEL386 | |
73 | ||
74 | /* Use type int rather than a union, to represent Lisp_Object */ | |
75 | ||
76 | #define NO_UNION_TYPE | |
77 | ||
78 | /* crt0.c, if it is used, should use the i386-bsd style of entry. | |
79 | with no extra dummy args. On USG and XENIX, | |
80 | NO_REMAP says this isn't used. */ | |
81 | ||
82 | #define CRT0_DUMMIES bogus_fp, | |
83 | ||
84 | /* crt0.c should define a symbol `start' and do .globl with a dot. */ | |
85 | ||
86 | #define DOT_GLOBAL_START | |
87 | ||
bb0807e7 RS |
88 | #ifdef SOLARIS2 |
89 | /* Data type of load average, as read out of kmem. */ | |
90 | #define LOAD_AVE_TYPE long | |
91 | ||
92 | /* Convert that into an integer that is 100 for a load average of 1.0 */ | |
93 | /* This is totally uncalibrated. */ | |
94 | #define LOAD_AVE_CVT(x) ((int) (((double) (x)) * 100.0 / FSCALE)) | |
95 | ||
2eec96b2 | 96 | /* J.W.Hawtin@lut.ac.uk say Solaris 2.4 as well as Solaris 2.1 on X86 |
421e0af7 RS |
97 | requires -lkvm as well. |
98 | And handa@etl.gov.jp says that -lkvm needs -llelf, at least on 2.5. */ | |
99 | #define LIBS_MACHINE -lkvm -lelf | |
3a7cf115 | 100 | |
2eec96b2 RS |
101 | #ifndef SOLARIS2_4 |
102 | /* J.W.hawtin@lut.ac.uk says Solaris 2.1 on the X86 has FSCALE defined in a | |
103 | system header. */ | |
17b406a8 RS |
104 | #else /* SOLARIS2_4 */ |
105 | #ifndef __GNUC__ | |
7602ba70 | 106 | #if 0 /* wisner@gryphon.com says this screws up cpp */ |
a40b9bc7 | 107 | #define C_SWITCH_MACHINE -Xa |
7602ba70 | 108 | #endif |
17b406a8 RS |
109 | #endif /* not __GNUC__ */ |
110 | #endif /* SOLARIS2_4 */ | |
7fa36802 RS |
111 | |
112 | /* configure thinks solaris X86 has gethostname, but it does not work, | |
113 | so undefine it. */ | |
bb0807e7 | 114 | #undef HAVE_GETHOSTNAME |
5d32abe6 RS |
115 | |
116 | #else /* not SOLARIS2 */ | |
117 | #ifdef USG5_4 /* Older USG systems do not support the load average. */ | |
118 | /* Data type of load average, as read out of kmem. */ | |
119 | ||
120 | #define LOAD_AVE_TYPE long | |
121 | ||
122 | /* Convert that into an integer that is 100 for a load average of 1.0 */ | |
123 | /* This is totally uncalibrated. */ | |
124 | ||
125 | #define LOAD_AVE_CVT(x) ((int) (((double) (x)) * 100.0 / FSCALE)) | |
126 | #define FSCALE 256.0 | |
bb0807e7 | 127 | #endif |
5d32abe6 | 128 | #endif /* not SOLARIS2 */ |
bb0807e7 | 129 | |
20c428fd JB |
130 | /* Define CANNOT_DUMP on machines where unexec does not work. |
131 | Then the function dump-emacs will not be defined | |
132 | and temacs will do (load "loadup") automatically unless told otherwise. */ | |
133 | ||
134 | /* #define CANNOT_DUMP */ | |
135 | ||
136 | /* Define VIRT_ADDR_VARIES if the virtual addresses of | |
137 | pure and impure space as loaded can vary, and even their | |
138 | relative order cannot be relied on. | |
139 | ||
140 | Otherwise Emacs assumes that text space precedes data space, | |
141 | numerically. */ | |
142 | ||
143 | /* #define VIRT_ADDR_VARIES */ | |
144 | ||
399c3df8 | 145 | /* this brings in alloca() if we're using cc */ |
20c428fd | 146 | #ifdef USG |
23b0668c | 147 | #ifndef LIB_STANDARD |
399c3df8 JB |
148 | #ifdef USG5_4 |
149 | #define LIB_STANDARD -lc | |
150 | #else /* not USG5_4 */ | |
20c428fd | 151 | #define LIB_STANDARD -lPW -lc |
399c3df8 JB |
152 | #endif /* not USG5_4 */ |
153 | #endif /* LIB_STANDARD */ | |
154 | ||
177c0ea7 | 155 | #define NO_REMAP |
20c428fd | 156 | #define TEXT_START 0 |
ebfbbbe4 | 157 | #endif /* USG */ |
20c428fd | 158 | |
23b0668c JB |
159 | #ifdef USG5_4 |
160 | #define DATA_SEG_BITS 0x08000000 | |
161 | #endif | |
44177ab0 RS |
162 | |
163 | #ifdef MSDOS | |
164 | #define NO_REMAP | |
165 | #endif | |
8c147e40 KH |
166 | |
167 | #ifdef WINDOWSNT | |
168 | #define VIRT_ADDR_VARIES | |
169 | #define DATA_END get_data_end () | |
170 | #define DATA_START get_data_start () | |
6f4961eb | 171 | #define NO_ARG_ARRAY |
8c147e40 | 172 | #endif |
03d6a59e RS |
173 | |
174 | #ifdef linux | |
175 | /* libc-linux/sysdeps/linux/i386/ulimit.c says that due to shared library, */ | |
176 | /* we cannot get the maximum address for brk */ | |
177 | #define ULIMIT_BREAK_VALUE (32*1024*1024) | |
178 | ||
179 | #define SEGMENT_MASK ((SEGMENT_SIZE)-1) | |
180 | #endif | |
ab5796a9 MB |
181 | |
182 | /* arch-tag: 746338f0-cb7b-4f49-a98c-cb50817cf2ec | |
183 | (do not change this comment) */ |