New file, with build instructions moved from the top-level INSTALL.

msdos/ChangeLog

@@ -1,3 +1,8 @@
+2008-11-08  Eli Zaretskii  <eliz@gnu.org>
+
+	* INSTALL: New file, with build instructions moved from the
+	top-level INSTALL.
+
 2008-10-14  Eli Zaretskii  <eliz@gnu.org>
 
 	* sedlisp.inp (lisp): Set to absolute file name of current

msdos/INSTALL

@@ -0,0 +1,153 @@
+GNU Emacs Installation Guide for the DJGPP (a.k.a. MS-DOS) port
+
+Copyright (C) 1992, 1994, 1996, 1997, 2000, 2001, 2002, 2003, 2004,
+2005, 2006, 2007, 2008  Free Software Foundation, Inc.
+See the end of the file for license conditions.
+
+The DJGPP port of GNU Emacs builds and runs on plain DOS and also on
+all versions of MS-Windows from version 3.X on, including Windows XP
+and Vista.
+
+To build and install the DJGPP port, you need to have the DJGPP ports
+of GCC (the GNU C compiler), GNU Make, rm, mv, and sed.  See the
+remarks in CONFIG.BAT for more information about locations and
+versions.  The Emacs FAQ (see info/efaq) includes pointers to Internet
+sites where you can find the necessary utilities; search for "MS-DOS".
+The configuration step (see below) will test for these utilities and
+will refuse to continue if any of them isn't found.
+
+Recompiling Lisp files in the `lisp' subdirectory using the various
+targets in the lisp/Makefile file requires additional utilities:
+`find' (from Findutils), GNU `echo' and `test' (from Sh-utils), and a
+port of Bash.  However, you should not normally need to run
+lisp/Makefile, as all the Lisp files are distributed in byte-compiled
+form as well.
+
+If you are building the DJGPP version of Emacs on an DOS-like system
+which supports long file names (e.g. Windows 9X or Windows XP), you
+need to make sure that long file names are handled consistently both
+when you unpack the distribution and compile it.  If you intend to
+compile with DJGPP v2.0 or later, and long file names support is
+enabled (LFN=y in the environment), you need to unpack Emacs
+distribution in a way that doesn't truncate the original long
+filenames to the DOS 8.3 namespace; the easiest way to do this is to
+use djtar program which comes with DJGPP, since it will note the LFN
+setting and behave accordingly.  You can build Emacs with LFN=n, if
+some of your tools don't support long file names: just ensure that LFN
+is set to `n' during both unpacking and compiling.
+
+(By the time you read this, you have already unpacked the Emacs
+distribution, but if the explanations above imply that you should have
+done it differently, it's safer to delete the directory tree created
+by the unpacking program and unpack Emacs again, than to risk running
+into problems during the build process.)
+
+It is important to understand that the runtime support of long file
+names by the Emacs binary is NOT affected by the LFN setting during
+compilation; Emacs compiled with DJGPP v2.0 or later will always
+support long file names on Windows no matter what was the setting
+of LFN at compile time.  However, if you compiled with LFN disabled
+and want to enable LFN support after Emacs was already built, you need
+to make sure that the support files in the lisp, etc and info
+directories are called by their original long names as found in the
+distribution.  You can do this either by renaming the files manually,
+or by extracting them from the original distribution archive with
+djtar after you set LFN=y in the environment.
+
+To unpack Emacs with djtar, type this command:
+
+    djtar -x emacs.tgz
+
+(This assumes that the Emacs distribution is called `emacs.tgz' on
+your system.)
+
+If you want to print international characters, install the intlfonts
+distribution.  For this, create a directory called `fonts' under the
+Emacs top-level directory (usually called `emacs-XX.YY') created by
+unpacking emacs.tgz, chdir into the directory emacs-XX.YY/fonts, and
+type this:
+
+    djtar -x intlfonts.tgz
+
+When unpacking Emacs is done, a directory called `emacs-XX.YY' will be
+created, where XX.YY is the Emacs version.  To build and install
+Emacs, chdir to that directory and type these commands:
+
+    config msdos
+    make install
+
+Running "config msdos" checks for several programs that are required
+to configure and build Emacs; if one of those programs is not found,
+CONFIG.BAT stops and prints an error message.  If you have DJGPP
+version 2.0 or 2.01, it will complain about a program called
+DJECHO.EXE.  These old versions of DJGPP shipped that program under
+the name ECHO.EXE, so you can simply copy ECHO.EXE to DJECHO.EXE and
+rerun CONFIG.BAT.  If you have neither ECHO.EXE nor DJECHO.EXE, you
+should be able to find them in your djdevNNN.zip archive (where NNN is
+the DJGPP version number).
+
+On Windows NT, Windows 2000/XP/Vista, running "config msdos" might
+print an error message like "VDM has been already loaded".  This is
+because those systems have a program called `redir.exe' which is
+incompatible with a program by the same name supplied with DJGPP,
+which is used by config.bat.  To resolve this, move the DJGPP's `bin'
+subdirectory to the front of your PATH environment variable.
+
+To install the international fonts, chdir to the intlfonts-X.Y
+directory created when you unpacked the intlfonts distribution (X.Y is
+the version number of the fonts' distribution), and type the following
+command:
+
+    make bdf INSTALLDIR=..
+
+After Make finishes, you may remove the directory intlfonts-X.Y; the
+fonts are installed into the fonts/bdf subdirectory of the top-level
+Emacs directory, and that is where Emacs will look for them by
+default.
+
+Building Emacs creates executable files in the src and lib-src
+directories.  Installing the DJGPP port of Emacs moves these
+executables to a sibling directory called bin.  For example, if you
+build in directory C:/emacs, installing moves the executables from
+C:/emacs/src and C:/emacs/lib-src to the directory C:/emacs/bin, so
+you can then delete the subdirectories C:/emacs/src and
+C:/emacs/lib-src if you wish.  The only subdirectories you need to
+keep are bin, lisp, etc and info.  (If you installed intlfonts, keep
+the fonts directory and all its subdirectories as well.)  The bin
+subdirectory should be added to your PATH.  The msdos subdirectory
+includes a PIF and an icon file for Emacs which you might find useful
+if you run Emacs under MS Windows.
+
+Emacs on MSDOS finds the lisp, etc and info directories by looking in
+../lisp, ../etc and ../info, starting from the directory where the
+Emacs executable was run from.  You can override this by setting the
+environment variables EMACSDATA (for the location of `etc' directory),
+EMACSLOADPATH (for the location of `lisp' directory) and INFOPATH (for
+the location of the `info' directory).
+
+Emacs features which require asynchronous subprocesses that depend on
+multitasking do not work in the DJGPP port.  Synchronous subprocesses
+do work, so features such as compilation and grep run synchronously,
+unlike opn other platforms.
+
+Version 2.0 of djgpp has two bugs that affect Emacs.  We've included
+corrected versions of two files from djgpp in the msdos subdirectory:
+is_exec.c and sigaction.c.  To work around the bugs, compile these
+files and link them into temacs.  Djgpp versions 2.01 and later have
+these bugs fixed, so upgrade if you can before building Emacs.
+
+
+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 3 of the License, 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.  If not, see <http://www.gnu.org/licenses/>.