
This is the PLT software package directory for Unix.

You have downloaded either the executable distribution or the source
code distribution. (If there is no plt/src directory,
you downloaded the executable distribution.) See the appropriate
section below for further instructions.


Executable Distribution
-----------------------

IMPORTANT:
 After unpacking this distribution, set the current directory to "plt"
 (the one containing this README file) and run: ./install

The following are the executables:

  plt/bin/drscheme -- the Scheme development environment

  plt/bin/mzscheme -- a text-only Scheme interpreter
  plt/bin/mred -- a graphical Scheme interpreter
  plt/bin/mzc -- a Scheme compiler
  plt/bin/help-desk --- for Help (also built into DrScheme)
  plt/bin/setup-plt --- command-line setup tool

DrScheme relies on MrEd (i.e., the DrScheme executable launches
MrEd with special startup instructions), and mzc relies on
MzScheme. You may not have some of these executables, depending on
which distribution you downloaded.


Source Code Distribution
------------------------

You must compile MzScheme and MrEd before using the PLT software
(including DrScheme).

For compilation instructions, see plt/src/README.


License
-------

PLT Software
Copyright (c) 1995-2002 PLT

PLT software is distributed under the GNU Lesser General Public
License (LGPL).  This means you can link PLT software (such as
MzScheme or MrEd) into proprietary applications, provided you follow
the specific rules stated in the LGPL.  You can also modify PLT
software; if you distribute a modified version, you must distribute it
under the terms of the LGPL, which in particular means that you must
release the source code for the modified software. See
notes/COPYING.LIB for more information.


More Information
----------------

For further information, select `Help Desk' from DrScheme's `Help'
menu, or run plt/bin/help-desk.
