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- /* This file is the configuration file for the Linux operating system.
- Copyright (C) 1985, 1986, 1992, 1994 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 */
-
- #ifdef emacs
- #include <stdio.h> /* Get the definition of _IO_STDIO_H. */
- #ifdef _IO_STDIO_H
- /* new C libio names */
- #define GNU_LIBRARY_PENDING_OUTPUT_COUNT(FILE) \
- ((FILE)->_IO_write_ptr - (FILE)->_IO_write_base)
- #else /* !_IO_STDIO_H */
- /* old C++ iostream names */
- #define GNU_LIBRARY_PENDING_OUTPUT_COUNT(FILE) \
- ((FILE)->_pptr - (FILE)->_pbase)
- #endif /* !_IO_STDIO_H */
- #endif /* emacs */
-
- /* Linux has crt0.o in a non-standard place */
- #define START_FILES pre-crt0.o /usr/lib/crt0.o
-
- /* As of version 1.1.51, Linux does not actually implement SIGIO. */
- /* Here we assume that signal.h is already included. */
- #ifdef emacs
- #undef SIGIO
- #endif
-
- /* This is needed for sysdep.c */
-
- #define NO_SIOCTL_H /* don't have sioctl.h */
-
- #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 getpagesize.h and systty.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)
-
- #define SEGMENT_MASK ((SEGMENT_SIZE)-1)
-
- /* 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 */
-
- /* Don't use -g in test compiles in configure.
- This is so we will use the same shared libs for that linking
- that are used when linking temacs. */
- #ifdef THIS_IS_CONFIGURE
- #define C_DEBUG_SWITCH
- #endif
-
- /* 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. */
-
- #ifdef TERM
- #define LIBS_MACHINE -lclient
- #define C_SWITCH_SYSTEM -D_BSD_SOURCE -I/usr/src/term
- #else
- /* alane@wozzle.linet.org says that -lipc is not a separate library,
- since libc-4.4.1. So -lipc was deleted. */
- #define LIBS_MACHINE
- #define C_SWITCH_SYSTEM -D_BSD_SOURCE
- #endif
-
- #define HAVE_SYSVIPC
-
- #ifdef LINUX_QMAGIC
-
- #define HAVE_TEXT_START
- #define UNEXEC unexsunos4.o
- #define N_PAGSIZ(x) PAGE_SIZE
-
- #else /* not LINUX_QMAGIC */
-
- #define A_TEXT_OFFSET(hdr) (N_MAGIC(hdr) == QMAGIC ? sizeof (struct exec) : 0)
- #define A_TEXT_SEEK(hdr) (N_TXTOFF(hdr) + A_TEXT_OFFSET(hdr))
- #define ADJUST_EXEC_HEADER \
- unexec_text_start = N_TXTADDR(ohdr) + A_TEXT_OFFSET(ohdr)
-
- #endif /* not LINUX_QMAGIC */
-
- #if 0
- /* In 19.23 and 19.24, configure sometimes fails to define these.
- It has to do with the fact that configure uses CFLAGS when linking
- while Makefile.in.in (erroneously) fails to do so when linking temacs. */
- #ifndef HAVE_GETTIMEOFDAY
- #define HAVE_GETTIMEOFDAY
- #endif
- #ifndef HAVE_MKDIR
- #define HAVE_MKDIR
- #endif
- #ifndef HAVE_RMDIR
- #define HAVE_RMDIR
- #endif
- #ifndef HAVE_XSCREENNUMBEROFSCREEN
- #define HAVE_XSCREENNUMBEROFSCREEN
- #endif
- #ifndef HAVE_XRMSETDATABASE
- #define HAVE_XRMSETDATABASE
- #endif
- #endif /* 0 */
-