

1. INTRODUCTION.

This is the README file from the distribution of Ada/Ed version
1.11.0a, an Ada interpreter for Unix-based machines.  The distribution
consists of one directory packaged into a compressed tar file available
through anonymous ftp on cs.nyu.edu (128.122.140.24) in the directory
pub/adaed.  The distribution contains all sources, documentation, the
Makefile, and some shell scripts used in building Ada/Ed.  The ftp
directory contains another distribution for 386/DOS machines.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Purpose License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version. See relevant excerpts below.

Ada/Ed is a translator-interpreter for Ada. It is intended as a teaching
tool, and does not have the capacity, performance,  or robustness of 
commercial Ada compilers. Ada/Ed was developed at New York University, as
part of a long-range project in language definition and software prototyping. 
The project produced the first validated translator for Ada, in the form of
an executable definition of the language written in SETL. The SETL system
served as design document and prototype for the C version being released today.

Ada/Ed was last validated under version 1.7 of the ACVC tests. Therefore it is
not currently a validated Ada system, and users can expect to find  small
discrepancies between Ada/Ed and currently validated compilers. 

Apart from the 100-odd tests of ACVC 1.11 that Ada/Ed currently fails, the
major deficiency of the system is that, being an interpreter, it does not 
implement most representation clauses, and thus does not support systems 
programming close to the machine level. 

We trust that even with these limitations, Ada/Ed will be of use to the
Ada community at large: students, educators, user, and implementors. The 
sources of the system should be of interest to compiler writers, and we hope 
that they will encourage the construction of software tools to make the system
more usable and polished. The NYUADA project does not have the resources to
promise regular new maintenance releases of the software, but will do its
best to keep track of reported errors, workarounds, and fixes. We will also
produce at irregular intervals design notes and additional documentation on
the front-end of the system.  We  urge users to send comments, corrections 
and bug reports (reduced to their simplest form!)  to:   adaed@cs.nyu.edu
 

All users of Ada/Ed are urged to register themselves by
sending email to the above address, or to the NYUADA project, New
York University, 251 Mercer Street, New York, NY 10012. This will allow us to
notify users of updates and new releases of the system.


2. (UN) WARRANTY

This software is release 1.11.0a of the Ada/Ed system.
It is distributed absolutely 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.

To receive a copy of the GNU General Public License write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139.

The following is an excerpt from the GNU General Public License concerning
warranties:

Because the program is licensed free of charge, there is no warranty
for the program, to the extent permitted by applicable law.  Except when
otherwise stated in writing the copyright holders and/or other parties
provide the program "as is" without warranty of any kind, either expressed
or implied, including, but not limited to, the implied warranties of
merchantability and fitness for a particular purpose.  The entire risk as
to the quality and performance of the program is with you.  Should the
program prove defective, you assume the cost of all necessary servicing,
repair or correction.

In no event unless required by applicable law or agreed to in writing
will any copyright holder, or any other party who may modify and/or
redistribute the program as permitted above, be liable to you for damages,
including any general, special, incidental or consequential damages arising
out of the use or inability to use the program (including but not limited
to loss of data or data being rendered inaccurate or losses sustained by
you or third parties or a failure of the program to operate with any other
programs), even if such holder or other party has been advised of the
possibility of such damages.


3. INSTALLATION


The directory contains C language source files, a Makefile, shell scripts
used in building the system, and documentation.

To install:

    1.  Edit the Makefile.  The installation of Ada/Ed puts top level
        executables in a directory that should be on users' PATH, and
        other executables called by the driver plus predefined ada
        library files are placed into a library directory.  The makefile
        macros BINDIR and LIBDIR should be defined to name these
        directories.  The makefile comes with gcc specified as the
        C compiler, which is the only one that it has actually been
        built with.  An ANSI C compiler is certainly needed.  Edit
        MANDIR for the location of man pages.

    2.  Look at the file config.h and determine if the symbols specifying
        word length and alignment will be set properly.

    3.  Build it. 'make install' will do everything; otherwise do
        'make', 'make predef', and 'make install'.

    4.  Read the man pages for adaed and enjoy it.

Copyright C 1986-1992 New York University


