1 /* This file is the configuration file for GNU/Linux operating systems.
2 Copyright (C) 1985, 1986, 1992, 1994 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
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)
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.
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, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 /* This file was put together by Michael K. Johnson and Rik Faith. */
25 * Define symbols to identify the version of Unix this is.
26 * Define all the symbols that apply correctly.
35 /* SYSTEM_TYPE should indicate the kind of system you are using.
36 It sets the Lisp variable system-type. */
38 #define SYSTEM_TYPE "linux" /* All the best software is free. */
40 /* Emacs can read input using SIGIO and buffering characters itself,
41 or using CBREAK mode and making C-g cause SIGINT.
42 The choice is controlled by the variable interrupt_input.
43 Define INTERRUPT_INPUT to make interrupt_input = 1 the default (use SIGIO)
45 SIGIO can be used only on systems that implement it (4.2 and 4.3).
46 CBREAK mode has two disadvantages
47 1) At least in 4.2, it is impossible to handle the Meta key properly.
48 I hear that in system V this problem does not exist.
49 2) Control-G causes output to be discarded.
50 I do not know whether this can be fixed in system V.
52 Another method of doing input is planned but not implemented.
53 It would have Emacs fork off a separate process
54 to read the input and send it to the true Emacs process
58 /* There have been suggestions made to add SIGIO to Linux. If this
59 is done, you may, at your discretion, uncomment the line below.
62 /* #define INTERRUPT_INPUT */
64 /* Letter to use in finding device name of first pty,
65 if system supports pty's. 'p' means it is /dev/ptyp0 */
67 #define FIRST_PTY_LETTER 'p'
70 * Define HAVE_TERMIOS if the system provides POSIX-style
71 * functions and macros for terminal control.
77 * Define HAVE_PTYS if the system supports pty devices.
82 /* Uncomment this later when other problems are dealt with -mkj */
86 /* Define this symbol if your system has the functions bcopy, etc. */
90 /* subprocesses should be defined if you want to
91 have code for asynchronous subprocesses
92 (as used in M-x compile and M-x shell).
93 This is generally OS dependent, and not supported
94 under most USG systems. */
98 /* define MAIL_USE_FLOCK if the mailer uses flock
99 to interlock access to /usr/spool/mail/$USER.
100 The alternative is that a lock file named
101 /usr/spool/mail/$USER.lock. */
103 /* Both are used in Linux by different mail programs. I assume that most
104 people are using newer mailers that have heard of flock. Change this
107 #define MAIL_USE_FLOCK
109 /* Define CLASH_DETECTION if you want lock files to be written
110 so that Emacs can tell instantly when you try to modify
111 a file that someone else has modified in his Emacs. */
113 #define CLASH_DETECTION
115 /* Here, on a separate page, add any special hacks needed
116 to make Emacs work on this system. For example,
117 you might define certain system call names that don't
118 exist on your system, or that do different things on
119 your system and must be used only through an encapsulation
120 (Which you should place, by convention, in sysdep.c). */
122 /* On POSIX systems the system calls are interruptible by signals
123 that the user program has elected to catch. Thus the system call
124 must be retried in these cases. To handle this without massive
125 changes in the source code, we remap the standard system call names
126 to names for our own functions in sysdep.c that do the system call
129 #define read sys_read
130 #define write sys_write
131 #define open sys_open
132 #define close sys_close
134 #define INTERRUPTIBLE_OPEN
135 #define INTERRUPTIBLE_CLOSE
136 #define INTERRUPTIBLE_IO
138 /* If you mount the proc file system somewhere other than /proc
139 you will have to uncomment the following and make the proper
142 /* #define LINUX_LDAV_FILE "/proc/loadavg" */
144 /* This is needed for disknew.c:update_frame */
147 #include <stdio.h> /* Get the definition of _IO_STDIO_H. */
148 #if defined(_IO_STDIO_H) || defined(_STDIO_USES_IOSTREAM)
149 /* new C libio names */
150 #define GNU_LIBRARY_PENDING_OUTPUT_COUNT(FILE) \
151 ((FILE)->_IO_write_ptr - (FILE)->_IO_write_base)
152 #else /* !_IO_STDIO_H */
153 /* old C++ iostream names */
154 #define GNU_LIBRARY_PENDING_OUTPUT_COUNT(FILE) \
155 ((FILE)->_pptr - (FILE)->_pbase)
156 #endif /* !_IO_STDIO_H */
159 /* Ask GCC where to find libgcc.a. */
160 #define LIB_GCC `$(CC) $(C_SWITCH_X_SITE) -print-libgcc-file-name`
163 /* Linux has crt0.o in a non-standard place */
164 #define START_FILES pre-crt0.o /usr/lib/crt0.o
166 #define START_FILES pre-crt0.o /usr/lib/crt1.o /usr/lib/crti.o
169 /* As of version 1.1.51, Linux does not actually implement SIGIO. */
170 /* Here we assume that signal.h is already included. */
173 /* Some versions of Linux define SIGURG and SIGPOLL as aliases for SIGIO.
174 This prevents lossage in process.c. */
179 /* This is needed for sysdep.c */
181 #define NO_SIOCTL_H /* don't have sioctl.h */
184 #define HAVE_SYS_SIGLIST
185 #define HAVE_GETWD /* cure conflict with getcwd? */
187 #define SYSV_SYSTEM_DIR /* use dirent.h */
189 #define POSIX /* affects getpagesize.h and systty.h */
190 #define POSIX_SIGNALS
192 /* Best not to include -lg, unless it is last on the command line */
195 #define LIB_STANDARD -lc /* avoid -lPW */
199 #define LIB_STANDARD -lgcc -lc -lgcc /usr/lib/crtn.o
202 /* Don't use -g in test compiles in configure.
203 This is so we will use the same shared libs for that linking
204 that are used when linking temacs. */
205 #ifdef THIS_IS_CONFIGURE
206 #define C_DEBUG_SWITCH
209 /* Let's try this out, just in case.
210 Nah. Rik Faith <faith@cs.unc.edu> says it doesn't work well. */
211 /* #define SIGNALS_VIA_CHARACTERS */
213 /* Rob Malouf <malouf@csli.stanford.edu> says:
214 SYSV IPC is standard a standard part of Linux since version 0.99pl10,
215 and is a very common addition to previous versions. */
218 #define LIBS_SYSTEM -lclient
219 #define C_SWITCH_SYSTEM -D_BSD_SOURCE -I/usr/src/term
221 /* alane@wozzle.linet.org says that -lipc is not a separate library,
222 since libc-4.4.1. So -lipc was deleted. */
224 #define C_SWITCH_SYSTEM -D_BSD_SOURCE
227 /* Paul Abrahams <abrahams@equinox.shaysnet.com> says this is needed. */
228 #define LIB_MOTIF -lXm -lXpm
233 #define UNEXEC unexelf.o
234 #define UNEXEC_USE_MAP_PRIVATE
239 #define HAVE_TEXT_START
240 #define UNEXEC unexsunos4.o
241 #define N_PAGSIZ(x) PAGE_SIZE
243 #else /* not LINUX_QMAGIC */
245 #define A_TEXT_OFFSET(hdr) (N_MAGIC(hdr) == QMAGIC ? sizeof (struct exec) : 0)
246 #define A_TEXT_SEEK(hdr) (N_TXTOFF(hdr) + A_TEXT_OFFSET(hdr))
247 #define ADJUST_EXEC_HEADER \
248 unexec_text_start = N_TXTADDR(ohdr) + A_TEXT_OFFSET(ohdr)
250 #endif /* not LINUX_QMAGIC */
253 /* In 19.23 and 19.24, configure sometimes fails to define these.
254 It has to do with the fact that configure uses CFLAGS when linking
255 while Makefile.in.in (erroneously) fails to do so when linking temacs. */
256 #ifndef HAVE_GETTIMEOFDAY
257 #define HAVE_GETTIMEOFDAY
265 #ifndef HAVE_XSCREENNUMBEROFSCREEN
266 #define HAVE_XSCREENNUMBEROFSCREEN
270 /* This is to work around mysterious gcc failures in some system versions.
271 It is unlikely that Emacs changes will work around this problem;
272 therefore, this should remain permanently. */
273 #ifndef HAVE_XRMSETDATABASE
274 #define HAVE_XRMSETDATABASE
277 /* The regex.o routines are a part of the GNU C-library used with Linux. */
278 /* However, sometimes they disagree with the src/regex.h that comes with Emacs,
279 and that can make trouble in etags.c because it gets the regex.h from Emacs
280 and the function definitions in libc. So turn this off. */
281 /* #define REGEXP_IN_LIBC */