Commit | Line | Data |
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23b0668c | 1 | /* Machine description file for intel 386. |
d8f6d720 | 2 | Copyright (C) 1987, 2002 Free Software Foundation, Inc. |
20c428fd JB |
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="note" | |
25 | ||
26 | NOTE-START | |
27 | Intel 386 (-machine=intel386 or -machine=is386.h) | |
28 | ||
29 | The possibilities for -opsystem are: bsd4-2, usg5-2-2, usg5-3, | |
b2aaf43a | 30 | isc2-2, 386-ix, esix, linux, sco3.2v4, and xenix. |
20c428fd JB |
31 | |
32 | 18.58 should support a wide variety of operating systems. | |
33 | Use isc2-2 for Interactive 386/ix version 2.2. | |
34 | Use 386ix for prior versions. | |
b2aaf43a JB |
35 | Use esix for Esix. |
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 | ||
74d3f806 KH |
52 | /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word |
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 | ||
88 | #ifdef XENIX | |
89 | /* Data type of load average, as read out of kmem. */ | |
90 | #define LOAD_AVE_TYPE short | |
91 | ||
92 | /* Convert that into an integer that is 100 for a load average of 1.0 */ | |
23b0668c | 93 | #define LOAD_AVE_CVT(x) (((double) (x)) * 100.0 / FSCALE) |
3186ddb7 | 94 | |
20c428fd JB |
95 | #define FSCALE 256.0 /* determined by experimentation... */ |
96 | #endif | |
97 | ||
20c428fd | 98 | |
bb0807e7 RS |
99 | #ifdef SOLARIS2 |
100 | /* Data type of load average, as read out of kmem. */ | |
101 | #define LOAD_AVE_TYPE long | |
102 | ||
103 | /* Convert that into an integer that is 100 for a load average of 1.0 */ | |
104 | /* This is totally uncalibrated. */ | |
105 | #define LOAD_AVE_CVT(x) ((int) (((double) (x)) * 100.0 / FSCALE)) | |
106 | ||
2eec96b2 | 107 | /* J.W.Hawtin@lut.ac.uk say Solaris 2.4 as well as Solaris 2.1 on X86 |
421e0af7 RS |
108 | requires -lkvm as well. |
109 | And handa@etl.gov.jp says that -lkvm needs -llelf, at least on 2.5. */ | |
110 | #define LIBS_MACHINE -lkvm -lelf | |
3a7cf115 | 111 | |
2eec96b2 RS |
112 | #ifndef SOLARIS2_4 |
113 | /* J.W.hawtin@lut.ac.uk says Solaris 2.1 on the X86 has FSCALE defined in a | |
114 | system header. */ | |
17b406a8 RS |
115 | #else /* SOLARIS2_4 */ |
116 | #ifndef __GNUC__ | |
7602ba70 | 117 | #if 0 /* wisner@gryphon.com says this screws up cpp */ |
a40b9bc7 | 118 | #define C_SWITCH_MACHINE -Xa |
7602ba70 | 119 | #endif |
17b406a8 RS |
120 | #endif /* not __GNUC__ */ |
121 | #endif /* SOLARIS2_4 */ | |
7fa36802 RS |
122 | |
123 | /* configure thinks solaris X86 has gethostname, but it does not work, | |
124 | so undefine it. */ | |
bb0807e7 | 125 | #undef HAVE_GETHOSTNAME |
5d32abe6 RS |
126 | |
127 | #else /* not SOLARIS2 */ | |
128 | #ifdef USG5_4 /* Older USG systems do not support the load average. */ | |
129 | /* Data type of load average, as read out of kmem. */ | |
130 | ||
131 | #define LOAD_AVE_TYPE long | |
132 | ||
133 | /* Convert that into an integer that is 100 for a load average of 1.0 */ | |
134 | /* This is totally uncalibrated. */ | |
135 | ||
136 | #define LOAD_AVE_CVT(x) ((int) (((double) (x)) * 100.0 / FSCALE)) | |
137 | #define FSCALE 256.0 | |
bb0807e7 | 138 | #endif |
5d32abe6 | 139 | #endif /* not SOLARIS2 */ |
bb0807e7 | 140 | |
20c428fd JB |
141 | /* Define CANNOT_DUMP on machines where unexec does not work. |
142 | Then the function dump-emacs will not be defined | |
143 | and temacs will do (load "loadup") automatically unless told otherwise. */ | |
144 | ||
145 | /* #define CANNOT_DUMP */ | |
146 | ||
147 | /* Define VIRT_ADDR_VARIES if the virtual addresses of | |
148 | pure and impure space as loaded can vary, and even their | |
149 | relative order cannot be relied on. | |
150 | ||
151 | Otherwise Emacs assumes that text space precedes data space, | |
152 | numerically. */ | |
153 | ||
154 | /* #define VIRT_ADDR_VARIES */ | |
155 | ||
156 | #ifdef XENIX | |
20c428fd JB |
157 | /* Define NO_REMAP if memory segmentation makes it not work well |
158 | to change the boundary between the text section and data section | |
159 | when Emacs is dumped. If you define this, the preloaded Lisp | |
160 | code will not be sharable; but that's better than failing completely. */ | |
161 | ||
162 | #define NO_REMAP | |
163 | ||
20c428fd JB |
164 | /* Since cannot purify, use standard Xenix 386 startup code. */ |
165 | ||
166 | #define START_FILES /lib/386/Sseg.o pre-crt0.o /lib/386/Scrt0.o | |
167 | ||
168 | /* These really use terminfo. */ | |
169 | ||
170 | #define LIBS_TERMCAP /lib/386/Slibcurses.a \ | |
171 | /lib/386/Slibtinfo.a /lib/386/Slibx.a | |
172 | ||
173 | /* Standard libraries for this machine. Since `-l' doesn't work in `ld'. */ | |
174 | /* '__fltused' is unresolved w/o Slibcfp.a */ | |
175 | #define LIB_STANDARD /lib/386/Slibcfp.a /lib/386/Slibc.a | |
176 | #else /* not XENIX */ | |
177 | ||
399c3df8 | 178 | /* this brings in alloca() if we're using cc */ |
20c428fd | 179 | #ifdef USG |
23b0668c | 180 | #ifndef LIB_STANDARD |
399c3df8 JB |
181 | #ifdef USG5_4 |
182 | #define LIB_STANDARD -lc | |
183 | #else /* not USG5_4 */ | |
20c428fd | 184 | #define LIB_STANDARD -lPW -lc |
399c3df8 JB |
185 | #endif /* not USG5_4 */ |
186 | #endif /* LIB_STANDARD */ | |
187 | ||
20c428fd JB |
188 | #define NO_REMAP |
189 | #define TEXT_START 0 | |
ebfbbbe4 | 190 | #endif /* USG */ |
20c428fd JB |
191 | #endif /* not XENIX */ |
192 | ||
23b0668c JB |
193 | #ifdef USG5_4 |
194 | #define DATA_SEG_BITS 0x08000000 | |
195 | #endif | |
44177ab0 RS |
196 | |
197 | #ifdef MSDOS | |
198 | #define NO_REMAP | |
199 | #endif | |
8c147e40 KH |
200 | |
201 | #ifdef WINDOWSNT | |
202 | #define VIRT_ADDR_VARIES | |
203 | #define DATA_END get_data_end () | |
204 | #define DATA_START get_data_start () | |
6f4961eb | 205 | #define NO_ARG_ARRAY |
8c147e40 | 206 | #endif |
03d6a59e RS |
207 | |
208 | #ifdef linux | |
209 | /* libc-linux/sysdeps/linux/i386/ulimit.c says that due to shared library, */ | |
210 | /* we cannot get the maximum address for brk */ | |
211 | #define ULIMIT_BREAK_VALUE (32*1024*1024) | |
212 | ||
213 | #define SEGMENT_MASK ((SEGMENT_SIZE)-1) | |
214 | #endif |