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- /* This file is the configuration file for the Linux operating system.
- Copyright (C) 1985, 1986, 1992 Free Software Foundation, Inc.
-
- This file is part of GNU Emacs.
-
- GNU Emacs is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- GNU Emacs is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNU Emacs; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- /* This file was put together by Michael K. Johnson and Rik Faith. */
-
-
- /*
- * Define symbols to identify the version of Unix this is.
- * Define all the symbols that apply correctly.
- */
-
- /* #define UNIPLUS */
- /* #define USG5 */
- #define USG
- /* #define BSD */
- #define LINUX
-
- /* SYSTEM_TYPE should indicate the kind of system you are using.
- It sets the Lisp variable system-type. */
-
- #define SYSTEM_TYPE "linux" /* All the best software is free. */
-
- /* Emacs can read input using SIGIO and buffering characters itself,
- or using CBREAK mode and making C-g cause SIGINT.
- The choice is controlled by the variable interrupt_input.
- Define INTERRUPT_INPUT to make interrupt_input = 1 the default (use SIGIO)
-
- SIGIO can be used only on systems that implement it (4.2 and 4.3).
- CBREAK mode has two disadvantages
- 1) At least in 4.2, it is impossible to handle the Meta key properly.
- I hear that in system V this problem does not exist.
- 2) Control-G causes output to be discarded.
- I do not know whether this can be fixed in system V.
-
- Another method of doing input is planned but not implemented.
- It would have Emacs fork off a separate process
- to read the input and send it to the true Emacs process
- through a pipe.
- */
-
- /* There have been suggestions made to add SIGIO to Linux. If this
- is done, you may, at your discretion, uncomment the line below.
- */
-
- /* #define INTERRUPT_INPUT */
-
- /* Letter to use in finding device name of first pty,
- if system supports pty's. 'p' means it is /dev/ptyp0 */
-
- #define FIRST_PTY_LETTER 'p'
-
- /*
- * Define HAVE_TERMIOS if the system provides POSIX-style
- * functions and macros for terminal control.
- */
-
- #define HAVE_TERMIOS
-
- /*
- * Define HAVE_TIMEVAL if the system supports the BSD style clock values.
- * Look in <sys/time.h> for a timeval structure.
- */
-
- #define HAVE_TIMEVAL
-
- /*
- * Define HAVE_SELECT if the system supports the `select' system call.
- */
-
- #define HAVE_SELECT
-
- /*
- * Define HAVE_PTYS if the system supports pty devices.
- */
-
- #define HAVE_PTYS
-
- /* Uncomment this later when other problems are dealt with -mkj */
-
- #define HAVE_SOCKETS
-
- /* Define this symbol if your system has the functions bcopy, etc. */
-
- #define BSTRING
-
- /* subprocesses should be defined if you want to
- have code for asynchronous subprocesses
- (as used in M-x compile and M-x shell).
- This is generally OS dependent, and not supported
- under most USG systems. */
-
- #define subprocesses
-
- /* define MAIL_USE_FLOCK if the mailer uses flock
- to interlock access to /usr/spool/mail/$USER.
- The alternative is that a lock file named
- /usr/spool/mail/$USER.lock. */
-
- /* Both are used in Linux by different mail programs. I assume that most
- people are using newer mailers that have heard of flock. Change this
- if you need to. */
-
- #define MAIL_USE_FLOCK
-
- /* Define CLASH_DETECTION if you want lock files to be written
- so that Emacs can tell instantly when you try to modify
- a file that someone else has modified in his Emacs. */
-
- /* #define CLASH_DETECTION */
-
- /* Here, on a separate page, add any special hacks needed
- to make Emacs work on this system. For example,
- you might define certain system call names that don't
- exist on your system, or that do different things on
- your system and must be used only through an encapsulation
- (Which you should place, by convention, in sysdep.c). */
-
- /* On POSIX systems the system calls are interruptible by signals
- that the user program has elected to catch. Thus the system call
- must be retried in these cases. To handle this without massive
- changes in the source code, we remap the standard system call names
- to names for our own functions in sysdep.c that do the system call
- with retries. */
-
- #define read sys_read
- #define write sys_write
- #define open sys_open
- #define close sys_close
-
- #define INTERRUPTIBLE_OPEN
- #define INTERRUPTIBLE_CLOSE
- #define INTERRUPTIBLE_IO
-
- /* If you mount the proc file system somewhere other than /proc
- you will have to uncomment the following and make the proper
- changes */
-
- /* #define LINUX_LDAV_FILE "/proc/loadavg" */
-
- /* This is needed for disknew.c:update_frame() */
-
- #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_pptr - (FILE)->_pbase)
-
- /* Linux has crt0.o in a non-standard place */
- #define START_FILES pre-crt0.o /usr/lib/crt0.o
-
- /* Linux has SIGIO defined, but not implemented, as of version 0.99.8
- * What an ugly kludge! This will not be necessary if the
- * INTERRUPT_INPUT define gets fully implemented.
- */
- #ifdef emacs
- #include <signal.h>
- #undef SIGIO
- #undef signal
- #define signal sys_signal
- #include <values.h>
- #endif
-
- #define HAVE_SETSID
-
- /* This is needed for sysdep.c */
-
- #define HAVE_UNISTD_H /* for getpagesize.h */
- #define NO_SIOCTL_H /* don't have sioctl.h */
-
- #if 0 /* autoconf should take care of this. */
- #define HAVE_RANDOM /* is builtin */
- #endif
- #define HAVE_GETPAGESIZE
- #define HAVE_VFORK
- #define HAVE_SYS_SIGLIST
- #define HAVE_GETWD /* cure conflict with getcwd? */
-
- #define USE_UTIME /* don't have utimes */
- #define SYSV_SYSTEM_DIR /* use dirent.h */
- #define USG_SYS_TIME /* use sys/time.h, not time.h */
-
- #define POSIX /* affects only getpagesize.h */
- #define POSIX_SIGNALS
-
- /* libc-linux/sysdeps/linux/i386/ulimit.c says that due to shared library, */
- /* we cannot get the maximum address for brk */
- #define ULIMIT_BREAK_VALUE (32*1024*1024)
-
- /* Best not to include -lg, unless it is last on the command line */
- #define LIBS_DEBUG
- #define LIBS_TERMCAP -ltermcap -lcurses /* save some space with shared libs*/
- #define LIB_STANDARD -lc /* avoid -lPW */
- #define C_OPTIMIZE_SWITCH /* configure can guess this just fine */
- #ifdef HAVE_X11
- #define LD_SWITCH_SYSTEM -L/usr/X386/lib
- #endif
-
- /* Work around a bug in glibc with _longjmp. */
- #define C_SWITCH_SYSTEM -D_BSD_SOURCE
-
- /* Let's try this out, just in case.
- Nah. Rik Faith <faith@cs.unc.edu> says it doesn't work well. */
- /* #define SIGNALS_VIA_CHARACTERS */
-
- /* Rob Malouf <malouf@csli.stanford.edu> says:
- SYSV IPC is standard a standard part of Linux since version 0.99pl10,
- and is a very common addition to previous versions. */
- #define LIBS_MACHINE -lipc
- #define HAVE_SYSVIPC
-