comparison src/s/linux.h @ 0:376386a54a3c r19-14

Import from CVS: tag r19-14
author cvs
date Mon, 13 Aug 2007 08:45:50 +0200
parents
children ac2d302a0011
comparison
equal deleted inserted replaced
-1:000000000000 0:376386a54a3c
1 /* This file is the configuration file for the GNU/Linux operating system,
2 prior to version 1.1.56.
3 Copyright (C) 1985, 1986, 1992, 1994 Free Software Foundation, Inc.
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
9 the Free Software Foundation; either version 2, or (at your option)
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 XEmacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
21
22 /* Synched up with: FSF 19.31 (called, ahem ... lignux.h in FSF). */
23
24 /* This file was put together by Michael K. Johnson and Rik Faith. */
25
26
27 /*
28 * Define symbols to identify the version of Unix this is.
29 * Define all the symbols that apply correctly.
30 */
31
32 /* #define UNIPLUS */
33 /* #define USG5 */
34 #define USG
35 /* #define BSD */
36 #define LINUX
37
38 /* SYSTEM_TYPE should indicate the kind of system you are using.
39 It sets the Lisp variable system-type. */
40
41 #define SYSTEM_TYPE "linux" /* All the best software is free. */
42
43 /* Letter to use in finding device name of first pty,
44 if system supports pty's. 'p' means it is /dev/ptyp0 */
45
46 #define FIRST_PTY_LETTER 'p'
47
48 /*
49 * Define HAVE_PTYS if the system supports pty devices.
50 */
51
52 #define HAVE_PTYS
53
54 /* define MAIL_USE_FLOCK if the mailer uses flock
55 to interlock access to /usr/spool/mail/$USER.
56 The alternative is that a lock file named
57 /usr/spool/mail/$USER.lock. */
58
59 /* Both are used in Linux by different mail programs. I assume that most
60 people are using newer mailers that have heard of flock. Change this
61 if you need to. */
62
63 #define MAIL_USE_FLOCK
64
65 /* Here, on a separate page, add any special hacks needed
66 to make Emacs work on this system. For example,
67 you might define certain system call names that don't
68 exist on your system, or that do different things on
69 your system and must be used only through an encapsulation
70 (Which you should place, by convention, in sysdep.c). */
71
72 /* On POSIX systems the system calls are interruptible by signals
73 that the user program has elected to catch. Thus the system call
74 must be retried in these cases. To handle this without massive
75 changes in the source code, we remap the standard system call names
76 to names for our own functions in sysdep.c that do the system call
77 with retries. */
78
79 #define INTERRUPTIBLE_OPEN
80 #define INTERRUPTIBLE_CLOSE
81 #define INTERRUPTIBLE_IO
82
83 /* If you mount the proc file system somewhere other than /proc
84 you will have to uncomment the following and make the proper
85 changes */
86
87 /* #define LINUX_LDAV_FILE "/proc/loadavg" */
88
89 /* XEmacs change: The realpath() in linux's libc (4.6.27) sometimes
90 * fails with ELOOP erroneously. For example, create a file
91 * thirty-five or so directories deep and call realpath on it. You
92 * get ELOOP even if no symlinks at all are involved.
93 * -dkindred@cs.cmu.edu */
94 #undef HAVE_REALPATH
95
96 /* This is needed for dispnew.c:update_frame */
97
98 #ifdef emacs
99 #include <stdio.h> /* Get the definition of _IO_STDIO_H. */
100 #if defined(_IO_STDIO_H) || defined(_STDIO_USES_IOSTREAM)
101 /* new C libio names */
102 #define GNU_LIBRARY_PENDING_OUTPUT_COUNT(FILE) \
103 ((FILE)->_IO_write_ptr - (FILE)->_IO_write_base)
104 #else /* !_IO_STDIO_H */
105 /* old C++ iostream names */
106 #define GNU_LIBRARY_PENDING_OUTPUT_COUNT(FILE) \
107 ((FILE)->_pptr - (FILE)->_pbase)
108 #endif /* !_IO_STDIO_H */
109 #endif /* emacs */
110
111 /* Ask GCC where to find libgcc.a. */
112 #define LIB_GCC `$(CC) $(C_SWITCH_X_SITE) -print-libgcc-file-name`
113
114 #ifndef __ELF__
115 /* Linux has crt0.o in a non-standard place */
116 #define START_FILES pre-crt0.o /usr/lib/crt0.o
117 #else
118 #define START_FILES pre-crt0.o /usr/lib/crt1.o /usr/lib/crti.o
119 #endif
120
121 /* Check the version number of Linux--if it is at least 1.1.56,
122 it is safe to use SIGIO. If we can't find version.h (could happen
123 if the user did a `make distclean' or something similar on the
124 kernel distribution) just assume that SIGIO works, because nearly
125 everybody should be running Linux 1.2 or later by now. */
126 #ifndef NOT_C_CODE
127 #ifdef emacs
128 #ifdef HAVE_LINUX_VERSION_H
129 #include <linux/version.h>
130
131 #if LINUX_VERSION_CODE < 0x10138
132 #define BROKEN_SIGIO
133 #endif /* LINUX_VERSION_CODE < 0x10138 */
134 #endif /* HAVE_LINUX_VERSION_H */
135 #endif /* emacs */
136 #endif /* NOT_C_CODE */
137
138 /* This is needed for sysdep.c */
139
140 #define NO_SIOCTL_H /* don't have sioctl.h */
141
142 #define HAVE_SYS_SIGLIST
143 #define HAVE_WAIT_HEADER
144
145 #define POSIX /* affects getpagesize.h and systty.h */
146
147 /* Best not to include -lg, unless it is last on the command line */
148 #define LIBS_DEBUG
149 #ifndef HAVE_NCURSES /* XEmacs change */
150 #define LIBS_TERMCAP -ltermcap -lcurses /* save some space with shared libs*/
151 #endif
152 #ifndef __ELF__
153 #define LIB_STANDARD -lc /* avoid -lPW */
154 #else
155 #undef LIB_GCC
156 #define LIB_GCC
157 #define LIB_STANDARD -lgcc -lc -lgcc /usr/lib/crtn.o
158 #endif
159
160 /* Don't use -g in test compiles in configure.
161 This is so we will use the same shared libs for that linking
162 that are used when linking temacs. */
163 #ifdef THIS_IS_CONFIGURE
164 #define C_DEBUG_SWITCH
165 #endif
166
167 /* Let's try this out, just in case.
168 Nah. Rik Faith <faith@cs.unc.edu> says it doesn't work well. */
169 /* #define SIGNALS_VIA_CHARACTERS */
170
171 #ifdef TERM
172 #define LIBS_SYSTEM -lclient
173 #define C_SWITCH_SYSTEM -D_BSD_SOURCE -I/usr/src/term
174 #else
175 /* alane@wozzle.linet.org says that -lipc is not a separate library,
176 since libc-4.4.1. So -lipc was deleted. */
177 #define LIBS_SYSTEM
178
179 /* XFree86 is built with -DFUNCPROTO=11 -DNARROWPROTO so we better build
180 XEmacs with these switches too so that X functions get called correctly.
181 At least XawScrollbarSetThumb needs this. */
182 #define C_SWITCH_SYSTEM -DFUNCPROTO=11 -DNARROWPROTO -D_BSD_SOURCE
183 #endif
184
185 /* Paul Abrahams <abrahams@equinox.shaysnet.com> says this is needed. */
186 #define LIB_MOTIF -lXm -lXpm
187
188 /* XEmacs change: configure doesn't find this because math.h aliases
189 rint to __rint so that it's not found. */
190 #define HAVE_RINT 1
191
192 #ifdef __ELF__
193 #define UNEXEC unexelf.o
194 #define UNEXEC_USE_MAP_PRIVATE
195 #endif
196
197 #ifdef LINUX_QMAGIC
198
199 #define HAVE_TEXT_START
200 #define UNEXEC unexsunos4.o
201 #define N_PAGSIZ(x) PAGE_SIZE
202
203 #else /* not LINUX_QMAGIC */
204
205 #define A_TEXT_OFFSET(hdr) (N_MAGIC(hdr) == QMAGIC ? sizeof (struct exec) : 0)
206 #define A_TEXT_SEEK(hdr) (N_TXTOFF(hdr) + A_TEXT_OFFSET(hdr))
207 #define ADJUST_EXEC_HEADER \
208 unexec_text_start = N_TXTADDR(ohdr) + A_TEXT_OFFSET(ohdr)
209
210 #endif /* not LINUX_QMAGIC */
211
212 #if 0
213 /* In 19.23 and 19.24, configure sometimes fails to define these.
214 It has to do with the fact that configure uses CFLAGS when linking
215 while Makefile.in.in (erroneously) fails to do so when linking temacs. */
216 #ifndef HAVE_GETTIMEOFDAY
217 #define HAVE_GETTIMEOFDAY
218 #endif
219 #ifndef HAVE_MKDIR
220 #define HAVE_MKDIR
221 #endif
222 #ifndef HAVE_RMDIR
223 #define HAVE_RMDIR
224 #endif
225 #ifndef HAVE_XSCREENNUMBEROFSCREEN
226 #define HAVE_XSCREENNUMBEROFSCREEN
227 #endif
228 #endif /* 0 */
229
230 /* This is to work around mysterious gcc failures in some system versions.
231 It is unlikely that Emacs changes will work around this problem;
232 therefore, this should remain permanently. */
233 #ifndef HAVE_XRMSETDATABASE
234 #define HAVE_XRMSETDATABASE
235 #endif
236
237 /* XEmacs addition: */
238 /* Linux defines these in <values.h>, but they can't be used in #if's
239 Include values.h now so that we don't get complaints if it's included later. */
240
241 #include <values.h>
242 #undef SHORTBITS
243 #undef INTBITS
244 #undef LONGBITS
245
246 /* The regex.o routines are a part of the GNU C-library used with Linux. */
247 /* However, sometimes they disagree with the src/regex.h that comes with Emacs,
248 and that can make trouble in etags.c because it gets the regex.h from Emacs
249 and the function definitions in libc. So turn this off. */
250 /* XEmacs: in any case, Mule uses different regex routines. */
251 /* #define REGEXP_IN_LIBC */
252
253 /* XEmacs change: the standard linux libc includes regex routines in
254 it. We have to use our own and have to avoid name conflicts. */
255
256 #define re_compile_pattern sys_re_compile_pattern
257 #define re_search sys_re_search
258 #define re_search_2 sys_re_search_2
259 #define re_match_2 sys_re_match_2
260 #define re_max_failures sys_re_max_failures
261 #define re_set_syntax sys_re_set_syntax
262 #define re_set_registers sys_re_set_registers
263 #define re_compile_fastmap sys_re_compile_fastmap
264 #define re_match sys_re_match
265 #define regcomp sys_regcomp
266 #define regexec sys_regexec
267 #define regerror sys_regerror
268 #define regfree sys_regfree
269
270 /* XEmacs: Damon Lipparelli says that he incorrectly gets this
271 defined on his system */
272 #undef GETTIMEOFDAY_ONE_ARGUMENT
273
274 /* Use BSD process groups, but use setpgid() instead of setpgrp() to
275 actually set a process group. */
276
277 /* Formerly "BSD_PGRPS" */
278
279 #if 0 /* XEmacs (ben): I'm not convinced this is necessary and it has
280 lots of possibility of fuckup. */
281 #define SIGIO_REQUIRES_SEPARATE_PROCESS_GROUP
282 #endif
283 /* XEmacs: removed setpgrp() definition because we use setpgid() when
284 it's available, and autodetect it. */