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+From johnsonm@stolaf.edu Thu Apr 29 23:04:42 1993
+Status: RO
+X-VM-v5-Data: ([nil nil nil nil nil nil nil nil nil]
+        ["6194" "Thu" "29" "April" "93" "21:50:38" "CDT" "Michael K Johnson" "johnsonm@stolaf.edu " nil "194" "linux.h file as promised" "^From:" nil nil "4"])
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+From: johnsonm@stolaf.edu (Michael K Johnson)
+To: emacs-19-alpha@gnu.ai.mit.edu
+Subject: linux.h file as promised
+Date: Thu, 29 Apr 93 21:50:38 CDT
+
+Here is the linux.h file that I used to compile emacs 19 with the
+patches that I just sent to the list in my last message.:
+
+michaelkjohnson
+
+--------8<--------linux.h
+/* This file is the configuration file for the Linux operating system.
+   Copyright (C) 1985, 1986, 1992 Free Software Foundation, Inc.
+   Some changes copyright (C) 1993 Michael K. Johnson and Rik Faith.
+
+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.  */
+
+
+/*
+ *      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 disadvatages
+     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).  */
+
+
+/* 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
+#endif
+
+/* This is needed for sysdep.c */
+
+#define HAVE_RENAME
+#define HAVE_UNISTD_H         /* for getpagesize.h */
+#define HAVE_ALLOCA_H         /* for getdate.y */
+#define NO_SIOCTL_H           /* don't have sioctl.h */
+
+#define HAVE_DUP2             /* is builtin */
+#define HAVE_RANDOM           /* is builtin */
+#define HAVE_CLOSEDIR
+#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 */
+#ifdef HAVE_X11
+#define LD_SWITCH_SYSTEM -L/usr/X386/lib
+#endif
+