code.delx.au - gnu-emacs/blob - src/s/gnu-linux.h

   1 /* This file is the configuration file for Lignux systems
   2    (that is,  Linux-based GNU operating systems.)
   3    Copyright (C) 1985, 1986, 1992, 1994, 1996 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 GNU Emacs; 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 /* This file was put together by Michael K. Johnson and Rik Faith.  */
  23
  24
  25 /*
  26  *      Define symbols to identify the version of Unix this is.
  27  *      Define all the symbols that apply correctly.
  28  */
  29
  30 /* #define UNIPLUS */
  31 /* #define USG5 */
  32 #define USG
  33 /* #define BSD */
  34 #define LINUX
  35
  36 /* SYSTEM_TYPE should indicate the kind of system you are using.
  37  It sets the Lisp variable system-type.  */
  38
  39 #define SYSTEM_TYPE "lignux"            /* All the best software is free. */
  40
  41 /* Check the version number of Linux--if it is at least 1.2.0,
  42    it is safe to use SIGIO.  */
  43 #ifndef NOT_C_CODE
  44 #ifdef emacs
  45 #ifdef HAVE_LINUX_VERSION_H
  46 #include <linux/version.h>
  47
  48 #if LINUX_VERSION_CODE > 0x10200
  49 #define LINUX_SIGIO_DOES_WORK
  50 #endif /* LINUX_VERSION_CODE > 0x10200 */
  51 #endif /* HAVE_LINUX_VERSION_H */
  52 #endif /* emacs */
  53 #endif /* NOT_C_CODE */
  54
  55 /* Letter to use in finding device name of first pty,
  56   if system supports pty's.  'p' means it is /dev/ptyp0  */
  57
  58 #define FIRST_PTY_LETTER 'p'
  59
  60 /*
  61  *      Define HAVE_TERMIOS if the system provides POSIX-style
  62  *      functions and macros for terminal control.
  63  */
  64
  65 #define HAVE_TERMIOS
  66
  67 /*
  68  *      Define HAVE_PTYS if the system supports pty devices.
  69  */
  70
  71 #define HAVE_PTYS
  72
  73 /* Uncomment this later when other problems are dealt with -mkj */
  74
  75 #define HAVE_SOCKETS
  76
  77 /* Define this symbol if your system has the functions bcopy, etc. */
  78
  79 #define BSTRING
  80
  81 /* subprocesses should be defined if you want to
  82    have code for asynchronous subprocesses
  83    (as used in M-x compile and M-x shell).
  84    This is generally OS dependent, and not supported
  85    under most USG systems. */
  86
  87 #define subprocesses
  88
  89 /* define MAIL_USE_FLOCK if the mailer uses flock
  90    to interlock access to /usr/spool/mail/$USER.
  91    The alternative is that a lock file named
  92    /usr/spool/mail/$USER.lock.  */
  93
  94 /* Both are used in Linux by different mail programs.  I assume that most
  95    people are using newer mailers that have heard of flock.  Change this
  96    if you need to. */
  97
  98 #define MAIL_USE_FLOCK
  99
 100 /* Define CLASH_DETECTION if you want lock files to be written
 101    so that Emacs can tell instantly when you try to modify
 102    a file that someone else has modified in his Emacs.  */
 103
 104 #define CLASH_DETECTION
 105
 106 /* Here, on a separate page, add any special hacks needed
 107    to make Emacs work on this system.  For example,
 108    you might define certain system call names that don't
 109    exist on your system, or that do different things on
 110    your system and must be used only through an encapsulation
 111    (Which you should place, by convention, in sysdep.c).  */
 112 \f
 113 /* On POSIX systems the system calls are interruptible by signals
 114  that the user program has elected to catch.  Thus the system call
 115  must be retried in these cases.  To handle this without massive
 116  changes in the source code, we remap the standard system call names
 117  to names for our own functions in sysdep.c that do the system call
 118  with retries. */
 119
 120 #define read sys_read
 121 #define write sys_write
 122 #define open sys_open
 123 #define close sys_close
 124
 125 #define INTERRUPTIBLE_OPEN
 126 #define INTERRUPTIBLE_CLOSE
 127 #define INTERRUPTIBLE_IO
 128
 129 /* If you mount the proc file system somewhere other than /proc
 130    you will have to uncomment the following and make the proper
 131    changes */
 132
 133 /* #define LINUX_LDAV_FILE "/proc/loadavg" */
 134
 135 /* This is needed for dispnew.c:update_frame */
 136
 137 #ifdef emacs
 138 #include <stdio.h>  /* Get the definition of _IO_STDIO_H.  */
 139 #if defined(_IO_STDIO_H) || defined(_STDIO_USES_IOSTREAM)
 140 /* new C libio names */
 141 #define GNU_LIBRARY_PENDING_OUTPUT_COUNT(FILE) \
 142   ((FILE)->_IO_write_ptr - (FILE)->_IO_write_base)
 143 #else /* !_IO_STDIO_H */
 144 /* old C++ iostream names */
 145 #define GNU_LIBRARY_PENDING_OUTPUT_COUNT(FILE) \
 146   ((FILE)->_pptr - (FILE)->_pbase)
 147 #endif /* !_IO_STDIO_H */
 148 #endif /* emacs */
 149
 150 /* Ask GCC where to find libgcc.a.  */
 151 #define LIB_GCC `$(CC) $(C_SWITCH_X_SITE) -print-libgcc-file-name`
 152
 153 #ifndef __ELF__
 154 /* Linux has crt0.o in a non-standard place */
 155 #define START_FILES pre-crt0.o /usr/lib/crt0.o
 156 #else
 157 #define START_FILES pre-crt0.o /usr/lib/crt1.o /usr/lib/crti.o
 158 #endif
 159
 160 /* As of version 1.1.51, Linux does not actually implement SIGIO.  */
 161 /* Here we assume that signal.h is already included.  */
 162 #ifdef emacs
 163 #ifdef LINUX_SIGIO_DOES_WORK
 164 #define INTERRUPT_INPUT
 165 #else
 166 #undef SIGIO
 167 /* Some versions of Linux define SIGURG and SIGPOLL as aliases for SIGIO.
 168    This prevents lossage in process.c.  */
 169 #undef SIGURG
 170 #undef SIGPOLL
 171 #endif
 172 #endif
 173
 174 /* This is needed for sysdep.c */
 175
 176 #define NO_SIOCTL_H           /* don't have sioctl.h */
 177
 178 #define HAVE_VFORK
 179 #define HAVE_SYS_SIGLIST
 180 #define HAVE_GETWD            /* cure conflict with getcwd? */
 181 #define HAVE_WAIT_HEADER
 182
 183 #define SYSV_SYSTEM_DIR       /* use dirent.h */
 184
 185 #define POSIX                 /* affects getpagesize.h and systty.h */
 186 #define POSIX_SIGNALS
 187
 188 /* Best not to include -lg, unless it is last on the command line */
 189 #define LIBS_DEBUG
 190 #ifndef __ELF__
 191 #define LIB_STANDARD -lc /* avoid -lPW */
 192 #else
 193 #undef LIB_GCC
 194 #define LIB_GCC
 195 #define LIB_STANDARD -lgcc -lc -lgcc /usr/lib/crtn.o
 196 #endif
 197
 198 /* Don't use -g in test compiles in configure.
 199    This is so we will use the same shared libs for that linking
 200    that are used when linking temacs.  */
 201 #ifdef THIS_IS_CONFIGURE
 202 #define C_DEBUG_SWITCH
 203 #endif
 204
 205 /* Let's try this out, just in case.
 206    Nah.  Rik Faith <faith@cs.unc.edu> says it doesn't work well.  */
 207 /* #define SIGNALS_VIA_CHARACTERS */
 208
 209 /* Rob Malouf <malouf@csli.stanford.edu> says:
 210    SYSV IPC is standard a standard part of Linux since version 0.99pl10,
 211    and is a very common addition to previous versions.  */
 212
 213 #ifdef TERM
 214 #define LIBS_SYSTEM -lclient
 215 #define C_SWITCH_SYSTEM -D_BSD_SOURCE -I/usr/src/term
 216 #else
 217 /* alane@wozzle.linet.org says that -lipc is not a separate library,
 218    since libc-4.4.1.  So -lipc was deleted.  */
 219 #define LIBS_SYSTEM
 220 #define C_SWITCH_SYSTEM -D_BSD_SOURCE
 221 #endif
 222
 223 /* Paul Abrahams <abrahams@equinox.shaysnet.com> says this is needed.  */
 224 #define LIB_MOTIF -lXm -lXpm
 225
 226 #ifdef HAVE_LIBNCURSES
 227 #define TERMINFO
 228 #define LIBS_TERMCAP -lncurses
 229 #endif
 230
 231 #define HAVE_SYSVIPC
 232
 233 #ifdef __ELF__
 234 #define UNEXEC unexelf.o
 235 #define UNEXEC_USE_MAP_PRIVATE
 236 #endif
 237
 238 #ifdef LINUX_QMAGIC
 239
 240 #define HAVE_TEXT_START
 241 #define UNEXEC unexsunos4.o
 242 #define N_PAGSIZ(x) PAGE_SIZE
 243
 244 #else /* not LINUX_QMAGIC */
 245
 246 #define A_TEXT_OFFSET(hdr) (N_MAGIC(hdr) == QMAGIC ? sizeof (struct exec) : 0)
 247 #define A_TEXT_SEEK(hdr) (N_TXTOFF(hdr) + A_TEXT_OFFSET(hdr))
 248 #define ADJUST_EXEC_HEADER \
 249   unexec_text_start = N_TXTADDR(ohdr) + A_TEXT_OFFSET(ohdr)
 250
 251 #endif /* not LINUX_QMAGIC */
 252
 253 #if 0
 254 /* In 19.23 and 19.24, configure sometimes fails to define these.
 255    It has to do with the fact that configure uses CFLAGS when linking
 256    while Makefile.in.in (erroneously) fails to do so when linking temacs.  */
 257 #ifndef HAVE_GETTIMEOFDAY
 258 #define HAVE_GETTIMEOFDAY
 259 #endif
 260 #ifndef HAVE_MKDIR
 261 #define HAVE_MKDIR
 262 #endif
 263 #ifndef HAVE_RMDIR
 264 #define HAVE_RMDIR
 265 #endif
 266 #ifndef HAVE_XSCREENNUMBEROFSCREEN
 267 #define HAVE_XSCREENNUMBEROFSCREEN
 268 #endif
 269 #endif /* 0 */
 270
 271 /* This is to work around mysterious gcc failures in some system versions.
 272    It is unlikely that Emacs changes will work around this problem;
 273    therefore, this should remain permanently.  */
 274 #ifndef HAVE_XRMSETDATABASE
 275 #define HAVE_XRMSETDATABASE
 276 #endif
 277
 278 /* The regex.o routines are a part of the GNU C-library used with Linux.  */
 279 /* However, sometimes they disagree with the src/regex.h that comes with Emacs,
 280    and that can make trouble in etags.c because it gets the regex.h from Emacs
 281    and the function definitions in libc.  So turn this off.  */
 282 /* #define REGEXP_IN_LIBC */
 283
 284 /* Use BSD process groups, but use setpgid() instead of setpgrp() to
 285    actually set a process group. */
 286
 287 #define BSD_PGRPS
 288 #define setpgrp(pid,pgid) setpgid((pid),(pgid))