src/s/gnu-linux.h

   1 /* This file is the configuration file for the Linux operating system.
   2    Copyright (C) 1985, 1986, 1992 Free Software Foundation, Inc.
   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
  20 /* This file was put together by Michael K. Johnson and Rik Faith.  */
  21
  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
  31 #define BSD
  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).
  45    CBREAK mode has two disadvatages
  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
  96 #define HAVE_SOCKETS
  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
 134
 135 /* If you mount the proc file system somewhere other than /proc
 136    you will have to uncomment the following and make the proper
 137    changes */
 138
 139 /* #define LINUX_LDAV_FILE "/proc/loadavg" */
 140
 141 /* This is needed for disknew.c:update_frame() */
 142
 143 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_pptr - (FILE)->_pbase)
 144
 145 /* Linux has crt0.o in a non-standard place */
 146 #define START_FILES pre-crt0.o /usr/lib/crt0.o
 147
 148 /* Linux has SIGIO defined, but not implemented, as of version 0.99.8
 149  * What an ugly kludge!  This will not be necessary if the
 150  * INTERRUPT_INPUT define gets fully implemented.
 151  */
 152 #ifdef emacs
 153 #include <signal.h>
 154 #undef SIGIO
 155 #endif
 156
 157 #define HAVE_SETSID
 158
 159 /* This is needed for sysdep.c */
 160
 161 #define HAVE_UNISTD_H         /* for getpagesize.h */
 162 #define NO_SIOCTL_H           /* don't have sioctl.h */
 163
 164 #define HAVE_RANDOM           /* is builtin */
 165 #define HAVE_CLOSEDIR
 166 #define HAVE_GETPAGESIZE
 167 #define HAVE_VFORK
 168 #define HAVE_SYS_SIGLIST
 169 #define HAVE_GETWD            /* cure conflict with getcwd? */
 170
 171 #define USE_UTIME             /* don't have utimes */
 172 #define SYSV_SYSTEM_DIR       /* use dirent.h */
 173 #define USG_SYS_TIME          /* use sys/time.h, not time.h */
 174
 175 #define POSIX                 /* affects only getpagesize.h */
 176 #define POSIX_SIGNALS
 177
 178 /* libc-linux/sysdeps/linux/i386/ulimit.c says that due to shared library, */
 179 /* we cannot get the maximum address for brk */
 180 #define ULIMIT_BREAK_VALUE (32*1024*1024)
 181
 182 /* Best not to include -lg, unless it is last on the command line */
 183 #define LIBS_DEBUG
 184 #define LIBS_TERMCAP -ltermcap -lcurses /* save some space with shared libs*/
 185 #define LIB_STANDARD -lc /* avoid -lPW */
 186 #ifdef HAVE_X11
 187 #define LD_SWITCH_SYSTEM -L/usr/X386/lib
 188 #endif