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1 | /* This file is the configuration file for the Linux operating system. |
2 | Copyright (C) 1985, 1986, 1992 Free Software Foundation, Inc. | |
566e3587 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 | |
8 | the Free Software Foundation; either version 2, 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 | ||
b49ef455 JB |
20 | /* This file was put together by Michael K. Johnson and Rik Faith. */ |
21 | ||
566e3587 JB |
22 | |
23 | /* | |
24 | * Define symbols to identify the version of Unix this is. | |
25 | * Define all the symbols that apply correctly. | |
26 | */ | |
27 | ||
28 | /* #define UNIPLUS */ | |
29 | /* #define USG5 */ | |
30 | #define USG | |
d391fe09 | 31 | /* #define BSD */ |
566e3587 JB |
32 | #define LINUX |
33 | ||
34 | /* SYSTEM_TYPE should indicate the kind of system you are using. | |
35 | It sets the Lisp variable system-type. */ | |
36 | ||
37 | #define SYSTEM_TYPE "linux" /* All the best software is free. */ | |
38 | ||
39 | /* Emacs can read input using SIGIO and buffering characters itself, | |
40 | or using CBREAK mode and making C-g cause SIGINT. | |
41 | The choice is controlled by the variable interrupt_input. | |
42 | Define INTERRUPT_INPUT to make interrupt_input = 1 the default (use SIGIO) | |
43 | ||
44 | SIGIO can be used only on systems that implement it (4.2 and 4.3). | |
eb8c3be9 | 45 | CBREAK mode has two disadvantages |
566e3587 JB |
46 | 1) At least in 4.2, it is impossible to handle the Meta key properly. |
47 | I hear that in system V this problem does not exist. | |
48 | 2) Control-G causes output to be discarded. | |
49 | I do not know whether this can be fixed in system V. | |
50 | ||
51 | Another method of doing input is planned but not implemented. | |
52 | It would have Emacs fork off a separate process | |
53 | to read the input and send it to the true Emacs process | |
54 | through a pipe. | |
55 | */ | |
56 | ||
57 | /* There have been suggestions made to add SIGIO to Linux. If this | |
58 | is done, you may, at your discretion, uncomment the line below. | |
59 | */ | |
60 | ||
61 | /* #define INTERRUPT_INPUT */ | |
62 | ||
63 | /* Letter to use in finding device name of first pty, | |
64 | if system supports pty's. 'p' means it is /dev/ptyp0 */ | |
65 | ||
66 | #define FIRST_PTY_LETTER 'p' | |
67 | ||
68 | /* | |
69 | * Define HAVE_TERMIOS if the system provides POSIX-style | |
70 | * functions and macros for terminal control. | |
71 | */ | |
72 | ||
73 | #define HAVE_TERMIOS | |
74 | ||
75 | /* | |
76 | * Define HAVE_TIMEVAL if the system supports the BSD style clock values. | |
77 | * Look in <sys/time.h> for a timeval structure. | |
78 | */ | |
79 | ||
80 | #define HAVE_TIMEVAL | |
81 | ||
82 | /* | |
83 | * Define HAVE_SELECT if the system supports the `select' system call. | |
84 | */ | |
85 | ||
86 | #define HAVE_SELECT | |
87 | ||
88 | /* | |
89 | * Define HAVE_PTYS if the system supports pty devices. | |
90 | */ | |
91 | ||
92 | #define HAVE_PTYS | |
93 | ||
94 | /* Uncomment this later when other problems are dealt with -mkj */ | |
95 | ||
dad29761 | 96 | #define HAVE_SOCKETS |
566e3587 JB |
97 | |
98 | /* Define this symbol if your system has the functions bcopy, etc. */ | |
99 | ||
100 | #define BSTRING | |
101 | ||
102 | /* subprocesses should be defined if you want to | |
103 | have code for asynchronous subprocesses | |
104 | (as used in M-x compile and M-x shell). | |
105 | This is generally OS dependent, and not supported | |
106 | under most USG systems. */ | |
107 | ||
108 | #define subprocesses | |
109 | ||
110 | /* define MAIL_USE_FLOCK if the mailer uses flock | |
111 | to interlock access to /usr/spool/mail/$USER. | |
112 | The alternative is that a lock file named | |
113 | /usr/spool/mail/$USER.lock. */ | |
114 | ||
115 | /* Both are used in Linux by different mail programs. I assume that most | |
116 | people are using newer mailers that have heard of flock. Change this | |
117 | if you need to. */ | |
118 | ||
119 | #define MAIL_USE_FLOCK | |
120 | ||
121 | /* Define CLASH_DETECTION if you want lock files to be written | |
122 | so that Emacs can tell instantly when you try to modify | |
123 | a file that someone else has modified in his Emacs. */ | |
124 | ||
125 | /* #define CLASH_DETECTION */ | |
126 | ||
127 | /* Here, on a separate page, add any special hacks needed | |
128 | to make Emacs work on this system. For example, | |
129 | you might define certain system call names that don't | |
130 | exist on your system, or that do different things on | |
131 | your system and must be used only through an encapsulation | |
132 | (Which you should place, by convention, in sysdep.c). */ | |
133 | \f | |
d391fe09 RS |
134 | /* On POSIX systems the system calls are interruptible by signals |
135 | that the user program has elected to catch. Thus the system call | |
136 | must be retried in these cases. To handle this without massive | |
137 | changes in the source code, we remap the standard system call names | |
138 | to names for our own functions in sysdep.c that do the system call | |
139 | with retries. */ | |
140 | ||
141 | #define read sys_read | |
142 | #define write sys_write | |
143 | #define open sys_open | |
144 | #define close sys_close | |
145 | ||
146 | #define INTERRUPTIBLE_OPEN | |
147 | #define INTERRUPTIBLE_CLOSE | |
148 | #define INTERRUPTIBLE_IO | |
566e3587 JB |
149 | |
150 | /* If you mount the proc file system somewhere other than /proc | |
151 | you will have to uncomment the following and make the proper | |
152 | changes */ | |
153 | ||
154 | /* #define LINUX_LDAV_FILE "/proc/loadavg" */ | |
155 | ||
156 | /* This is needed for disknew.c:update_frame() */ | |
157 | ||
5e5623c2 | 158 | #ifdef emacs |
5e5623c2 RS |
159 | #ifdef _IO_STDIO_H |
160 | /* new C libio names */ | |
161 | #define PENDING_OUTPUT_COUNT(FILE) \ | |
162 | ((FILE)->_IO_write_ptr - (FILE)->_IO_write_base) | |
163 | #else /* !_IO_STDIO_H */ | |
164 | /* old C++ iostream names */ | |
165 | #define PENDING_OUTPUT_COUNT(FILE) \ | |
166 | ((FILE)->_pptr - (FILE)->_pbase) | |
167 | #endif /* !_IO_STDIO_H */ | |
168 | #endif /* emacs */ | |
566e3587 JB |
169 | |
170 | /* Linux has crt0.o in a non-standard place */ | |
171 | #define START_FILES pre-crt0.o /usr/lib/crt0.o | |
172 | ||
173 | /* Linux has SIGIO defined, but not implemented, as of version 0.99.8 | |
174 | * What an ugly kludge! This will not be necessary if the | |
175 | * INTERRUPT_INPUT define gets fully implemented. | |
176 | */ | |
177 | #ifdef emacs | |
178 | #include <signal.h> | |
179 | #undef SIGIO | |
d391fe09 RS |
180 | #undef signal |
181 | #define signal sys_signal | |
182 | #include <values.h> | |
566e3587 JB |
183 | #endif |
184 | ||
185 | /* This is needed for sysdep.c */ | |
186 | ||
566e3587 JB |
187 | #define NO_SIOCTL_H /* don't have sioctl.h */ |
188 | ||
f7bcff96 | 189 | #if 0 /* autoconf should take care of this. */ |
4eeddc66 | 190 | #define HAVE_UNISTD_H /* for getpagesize.h */ |
566e3587 | 191 | #define HAVE_RANDOM /* is builtin */ |
f7bcff96 | 192 | #endif |
566e3587 JB |
193 | #define HAVE_GETPAGESIZE |
194 | #define HAVE_VFORK | |
195 | #define HAVE_SYS_SIGLIST | |
196 | #define HAVE_GETWD /* cure conflict with getcwd? */ | |
197 | ||
198 | #define USE_UTIME /* don't have utimes */ | |
199 | #define SYSV_SYSTEM_DIR /* use dirent.h */ | |
200 | #define USG_SYS_TIME /* use sys/time.h, not time.h */ | |
201 | ||
1abbab7a | 202 | #define POSIX /* affects getpagesize.h and systty.h */ |
566e3587 JB |
203 | #define POSIX_SIGNALS |
204 | ||
205 | /* libc-linux/sysdeps/linux/i386/ulimit.c says that due to shared library, */ | |
206 | /* we cannot get the maximum address for brk */ | |
207 | #define ULIMIT_BREAK_VALUE (32*1024*1024) | |
208 | ||
209 | /* Best not to include -lg, unless it is last on the command line */ | |
210 | #define LIBS_DEBUG | |
211 | #define LIBS_TERMCAP -ltermcap -lcurses /* save some space with shared libs*/ | |
212 | #define LIB_STANDARD -lc /* avoid -lPW */ | |
9183f1f9 | 213 | #define C_OPTIMIZE_SWITCH /* configure can guess this just fine */ |
566e3587 JB |
214 | #ifdef HAVE_X11 |
215 | #define LD_SWITCH_SYSTEM -L/usr/X386/lib | |
216 | #endif | |
3233bbe1 | 217 | |
9e479734 JB |
218 | /* Let's try this out, just in case. |
219 | Nah. Rik Faith <faith@cs.unc.edu> says it doesn't work well. */ | |
220 | /* #define SIGNALS_VIA_CHARACTERS */ | |
9199fa7f JB |
221 | |
222 | /* Rob Malouf <malouf@csli.stanford.edu> says: | |
223 | SYSV IPC is standard a standard part of Linux since version 0.99pl10, | |
224 | and is a very common addition to previous versions. */ | |
cafdb68a RS |
225 | |
226 | #ifdef TERM | |
227 | #define LIBS_MACHINE -lclient | |
228 | #define C_SWITCH_SYSTEM -D_BSD_SOURCE -I/usr/src/term | |
229 | #else | |
edb0cf8d RS |
230 | /* alane@wozzle.linet.org says that -lipc is not a separate library, |
231 | since libc-4.4.1. So -lipc was deleted. */ | |
232 | #define LIBS_MACHINE | |
cafdb68a RS |
233 | #define C_SWITCH_SYSTEM -D_BSD_SOURCE |
234 | #endif | |
235 | ||
9199fa7f | 236 | #define HAVE_SYSVIPC |
b04101bb RS |
237 | |
238 | #define A_TEXT_OFFSET(hdr) (N_MAGIC(hdr) == QMAGIC ? sizeof (struct exec) : 0) | |
239 | #define A_TEXT_SEEK(hdr) (N_TXTOFF(hdr) + A_TEXT_OFFSET(hdr)) | |
240 | #define ADJUST_EXEC_HEADER \ | |
241 | unexec_text_start = N_TXTADDR(ohdr) + A_TEXT_OFFSET(ohdr) |