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

   1 /* This file is the configuration file for GNU/Linux operating systems.
   2    Copyright (C) 1985, 1986, 1992, 1994, 1996 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, Inc., 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21 /* This file was put together by Michael K. Johnson and Rik Faith.  */
  22
  23
  24 /*
  25  *      Define symbols to identify the version of Unix this is.
  26  *      Define all the symbols that apply correctly.
  27  */
  28
  29 /* #define UNIPLUS */
  30 /* #define USG5 */
  31 #define USG
  32 /* #define BSD */
  33 #define LINUX
  34
  35 /* SYSTEM_TYPE should indicate the kind of system you are using.
  36  It sets the Lisp variable system-type.  */
  37
  38 #define SYSTEM_TYPE "linux"             /* All the best software is free. */
  39
  40 /* Check the version number of Linux--if it is at least 1.2.0,
  41    it is safe to use SIGIO.  */
  42 #ifndef NOT_C_CODE
  43 #ifdef emacs
  44 #ifdef HAVE_VERSION_H
  45 #include <linux/version.h>
  46
  47 #if LINUX_VERSION_CODE > 0x10200
  48 #define LINUX_SIGIO_DOES_WORK
  49 #endif /* LINUX_VERSION_CODE > 0x10200 */
  50 #endif /* HAVE_VERSION_H */
  51 #endif /* emacs */
  52 #endif /* NOT_C_CODE */
  53
  54 /* Letter to use in finding device name of first pty,
  55   if system supports pty's.  'p' means it is /dev/ptyp0  */
  56
  57 #define FIRST_PTY_LETTER 'p'
  58
  59 /*
  60  *      Define HAVE_TERMIOS if the system provides POSIX-style
  61  *      functions and macros for terminal control.
  62  */
  63
  64 #define HAVE_TERMIOS
  65
  66 /*
  67  *      Define HAVE_PTYS if the system supports pty devices.
  68  */
  69
  70 #define HAVE_PTYS
  71
  72 /* Uncomment this later when other problems are dealt with -mkj */
  73
  74 #define HAVE_SOCKETS
  75
  76 /* Define this symbol if your system has the functions bcopy, etc. */
  77
  78 #define BSTRING
  79
  80 /* subprocesses should be defined if you want to
  81    have code for asynchronous subprocesses
  82    (as used in M-x compile and M-x shell).
  83    This is generally OS dependent, and not supported
  84    under most USG systems. */
  85
  86 #define subprocesses
  87
  88 /* define MAIL_USE_FLOCK if the mailer uses flock
  89    to interlock access to /usr/spool/mail/$USER.
  90    The alternative is that a lock file named
  91    /usr/spool/mail/$USER.lock.  */
  92
  93 /* Both are used in Linux by different mail programs.  I assume that most
  94    people are using newer mailers that have heard of flock.  Change this
  95    if you need to. */
  96
  97 #define MAIL_USE_FLOCK
  98
  99 /* Define CLASH_DETECTION if you want lock files to be written
 100    so that Emacs can tell instantly when you try to modify
 101    a file that someone else has modified in his Emacs.  */
 102
 103 #define CLASH_DETECTION
 104
 105 /* Here, on a separate page, add any special hacks needed
 106    to make Emacs work on this system.  For example,
 107    you might define certain system call names that don't
 108    exist on your system, or that do different things on
 109    your system and must be used only through an encapsulation
 110    (Which you should place, by convention, in sysdep.c).  */
 111 \f
 112 /* On POSIX systems the system calls are interruptible by signals
 113  that the user program has elected to catch.  Thus the system call
 114  must be retried in these cases.  To handle this without massive
 115  changes in the source code, we remap the standard system call names
 116  to names for our own functions in sysdep.c that do the system call
 117  with retries. */
 118
 119 #define read sys_read
 120 #define write sys_write
 121 #define open sys_open
 122 #define close sys_close
 123
 124 #define INTERRUPTIBLE_OPEN
 125 #define INTERRUPTIBLE_CLOSE
 126 #define INTERRUPTIBLE_IO
 127
 128 /* If you mount the proc file system somewhere other than /proc
 129    you will have to uncomment the following and make the proper
 130    changes */
 131
 132 /* #define LINUX_LDAV_FILE "/proc/loadavg" */
 133
 134 /* This is needed for dispnew.c:update_frame */
 135
 136 #ifdef emacs
 137 #include <stdio.h>  /* Get the definition of _IO_STDIO_H.  */
 138 #if defined(_IO_STDIO_H) || defined(_STDIO_USES_IOSTREAM)
 139 /* new C libio names */
 140 #define GNU_LIBRARY_PENDING_OUTPUT_COUNT(FILE) \
 141   ((FILE)->_IO_write_ptr - (FILE)->_IO_write_base)
 142 #else /* !_IO_STDIO_H */
 143 /* old C++ iostream names */
 144 #define GNU_LIBRARY_PENDING_OUTPUT_COUNT(FILE) \
 145   ((FILE)->_pptr - (FILE)->_pbase)
 146 #endif /* !_IO_STDIO_H */
 147 #endif /* emacs */
 148
 149 /* Ask GCC where to find libgcc.a.  */
 150 #define LIB_GCC `$(CC) $(C_SWITCH_X_SITE) -print-libgcc-file-name`
 151
 152 #ifndef __ELF__
 153 /* Linux has crt0.o in a non-standard place */
 154 #define START_FILES pre-crt0.o /usr/lib/crt0.o
 155 #else
 156 #define START_FILES pre-crt0.o /usr/lib/crt1.o /usr/lib/crti.o
 157 #endif
 158
 159 /* As of version 1.1.51, Linux does not actually implement SIGIO.  */
 160 /* Here we assume that signal.h is already included.  */
 161 #ifdef emacs
 162 #ifdef LINUX_SIGIO_DOES_WORK
 163 #define INTERRUPT_INPUT
 164 #else
 165 #undef SIGIO
 166 /* Some versions of Linux define SIGURG and SIGPOLL as aliases for SIGIO.
 167    This prevents lossage in process.c.  */
 168 #undef SIGURG
 169 #undef SIGPOLL
 170 #endif
 171 #endif
 172
 173 /* This is needed for sysdep.c */
 174
 175 #define NO_SIOCTL_H           /* don't have sioctl.h */
 176
 177 #define HAVE_VFORK
 178 #define HAVE_SYS_SIGLIST
 179 #define HAVE_GETWD            /* cure conflict with getcwd? */
 180
 181 #define SYSV_SYSTEM_DIR       /* use dirent.h */
 182
 183 #define POSIX                 /* affects getpagesize.h and systty.h */
 184 #define POSIX_SIGNALS
 185
 186 /* Best not to include -lg, unless it is last on the command line */
 187 #define LIBS_DEBUG
 188 #ifndef __ELF__
 189 #define LIB_STANDARD -lc /* avoid -lPW */
 190 #else
 191 #undef LIB_GCC
 192 #define LIB_GCC
 193 #define LIB_STANDARD -lgcc -lc -lgcc /usr/lib/crtn.o
 194 #endif
 195
 196 /* Don't use -g in test compiles in configure.
 197    This is so we will use the same shared libs for that linking
 198    that are used when linking temacs.  */
 199 #ifdef THIS_IS_CONFIGURE
 200 #define C_DEBUG_SWITCH
 201 #endif
 202
 203 /* Let's try this out, just in case.
 204    Nah.  Rik Faith <faith@cs.unc.edu> says it doesn't work well.  */
 205 /* #define SIGNALS_VIA_CHARACTERS */
 206
 207 /* Rob Malouf <malouf@csli.stanford.edu> says:
 208    SYSV IPC is standard a standard part of Linux since version 0.99pl10,
 209    and is a very common addition to previous versions.  */
 210
 211 #ifdef TERM
 212 #define LIBS_SYSTEM -lclient
 213 #define C_SWITCH_SYSTEM -D_BSD_SOURCE -I/usr/src/term
 214 #else
 215 /* alane@wozzle.linet.org says that -lipc is not a separate library,
 216    since libc-4.4.1.  So -lipc was deleted.  */
 217 #define LIBS_SYSTEM
 218 #define C_SWITCH_SYSTEM -D_BSD_SOURCE
 219 #endif
 220
 221 /* Paul Abrahams <abrahams@equinox.shaysnet.com> says this is needed.  */
 222 #define LIB_MOTIF -lXm -lXpm
 223
 224 #if 0 /* bobg@ipost.com reports that terminal type unknown, used by
 225          comint.el, is broken "on Linux".  I don't know which system
 226          or version he means.  */
 227 #ifdef HAVE_NCURSES
 228 #define TERMINFO
 229 #endif
 230 #endif
 231
 232 #define HAVE_SYSVIPC
 233
 234 #ifdef __ELF__
 235 #define UNEXEC unexelf.o
 236 #define UNEXEC_USE_MAP_PRIVATE
 237 #endif
 238
 239 #ifdef LINUX_QMAGIC
 240
 241 #define HAVE_TEXT_START
 242 #define UNEXEC unexsunos4.o
 243 #define N_PAGSIZ(x) PAGE_SIZE
 244
 245 #else /* not LINUX_QMAGIC */
 246
 247 #define A_TEXT_OFFSET(hdr) (N_MAGIC(hdr) == QMAGIC ? sizeof (struct exec) : 0)
 248 #define A_TEXT_SEEK(hdr) (N_TXTOFF(hdr) + A_TEXT_OFFSET(hdr))
 249 #define ADJUST_EXEC_HEADER \
 250   unexec_text_start = N_TXTADDR(ohdr) + A_TEXT_OFFSET(ohdr)
 251
 252 #endif /* not LINUX_QMAGIC */
 253
 254 #if 0
 255 /* In 19.23 and 19.24, configure sometimes fails to define these.
 256    It has to do with the fact that configure uses CFLAGS when linking
 257    while Makefile.in.in (erroneously) fails to do so when linking temacs.  */
 258 #ifndef HAVE_GETTIMEOFDAY
 259 #define HAVE_GETTIMEOFDAY
 260 #endif
 261 #ifndef HAVE_MKDIR
 262 #define HAVE_MKDIR
 263 #endif
 264 #ifndef HAVE_RMDIR
 265 #define HAVE_RMDIR
 266 #endif
 267 #ifndef HAVE_XSCREENNUMBEROFSCREEN
 268 #define HAVE_XSCREENNUMBEROFSCREEN
 269 #endif
 270 #endif /* 0 */
 271
 272 /* This is to work around mysterious gcc failures in some system versions.
 273    It is unlikely that Emacs changes will work around this problem;
 274    therefore, this should remain permanently.  */
 275 #ifndef HAVE_XRMSETDATABASE
 276 #define HAVE_XRMSETDATABASE
 277 #endif
 278
 279 /* The regex.o routines are a part of the GNU C-library used with Linux.  */
 280 /* However, sometimes they disagree with the src/regex.h that comes with Emacs,
 281    and that can make trouble in etags.c because it gets the regex.h from Emacs
 282    and the function definitions in libc.  So turn this off.  */
 283 /* #define REGEXP_IN_LIBC */
 284