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<a name="n1"></a><H1>0 Preface</H1>
<!-- INDEX -->
<ul>
<li><a href="#n2">Introduction</a>
<li><a href="#n3">Special Introduction for Version 1.3</a>
<li><a href="#n4">SWIG Versions</a>
<li><a href="#n5">SWIG resources</a>
<li><a href="#n6">Prerequisites</a>
<li><a href="#n7">Organization of this manual</a>
<li><a href="#n8">How to avoid reading the manual</a>
<li><a href="#n9">Backwards Compatibility</a>
<li><a href="#n10">Credits</a>
<li><a href="#n11">Bug reports</a>
</ul>
<!-- INDEX -->



<a name="n2"></a><H2>0.1 Introduction</H2>


SWIG is a software development tool for building scripting language
interfaces to C and C++ programs.  Originally developed in 1995, SWIG was
first used by scientists in the Theoretical Physics Division at Los Alamos National Laboratory for
building user interfaces to simulation codes running on the Connection
Machine 5 supercomputer. In this environment, scientists needed to
work with huge amounts of simulation data, complex hardware, and a
constantly changing code base. The use of a scripting language
interface provided a simple yet highly flexible foundation for solving these
types of problems.  SWIG simplifies development by largely automating
the task of scripting language integration--allowing developers and users
to focus on more important problems.

<p>
Although SWIG was originally developed for scientific applications, it
has since evolved into a general purpose tool that is used in a wide
variety of applications--in fact almost anything where C/C++ programming
is involved.

<p>
<a name="n3"></a><H2>0.2 Special Introduction for Version 1.3</H2>


Since SWIG was released in 1996, its user base and applicability has
continued to grow. Although its rate of development has varied, an
active development effort has continued to make improvements to the
system.  Today, nearly a dozen developers are working to create
SWIG-2.0---a system that aims to provide wrapping support for nearly
all of the ANSI C++ standard and approximately ten target languages
including Guile, Java, Mzscheme, Ocaml, Perl, Pike, PHP, Python, Ruby,
and Tcl.

<p>
<a name="n4"></a><H2>0.3 SWIG Versions</H2>


For several years, the most stable version of SWIG has been release
1.1p5. Starting with version 1.3, a new version numbering scheme has
been adopted.  Odd version numbers (1.3, 1.5, etc.) represent
development versions of SWIG.  Even version numbers (1.4, 1.6, etc.)
represent stable releases.  Currently, developers are working to
create a stable SWIG-2.0 release (late 2002).

<a name="n5"></a><H2>0.4 SWIG resources</H2>


The official location of SWIG related material is<p>

<blockquote><pre>
<a href="http://www.swig.org">http://www.swig.org</a>
</pre></blockquote>

<p>
This site contains the latest version of the software, users guide,
and information regarding bugs, installation problems, and
implementation tricks. 

<p>
You can also subscribe to the SWIG mailing list by visiting the page

<p>
<blockquote><pre><a href="http://mailman.cs.uchicago.edu/listinfo/swig">http://mailman.cs.uchicago.edu/listinfo/swig</a>
</pre></blockquote>

<p>
The mailing list often discusses some of the more technical aspects of
SWIG along with information about beta releases and future work.<p>

<p>
CVS access to the latest version of SWIG is also available.  More information 
about this can be obtained at:

<p>
<blockquote><pre><a href="http://www.swig.org/cvs.html">http://www.swig.org/cvs.html</a>
</pre></blockquote>


<a name="n6"></a><H2>0.5 Prerequisites</H2>


This manual assumes that you know how to write C/C++ programs and that you
have at least heard of scripting languages such as 
Tcl, Python, and Perl. A detailed knowledge of these scripting
languages is not required although some familiarity won't
hurt. No prior experience with building C extensions to these
languages is required---after all, this is what SWIG does automatically.
However, you should be reasonably familiar with the use of
compilers, linkers, and makefiles since making
scripting language extensions is somewhat more complicated than
writing a normal C program.

<a name="n7"></a><H2>0.6 Organization of this manual</H2>


The first few chapters of this manual describe SWIG in general and
provide an overview of its capabilities. The remaining chapters are
devoted to specific SWIG language modules and are self
contained. Thus, if you are using SWIG to build Python interfaces, you
can probably skip to that chapter and find almost everything you need
to know.   Caveat: we are currently working on a documentation rewrite and many
of the older language module chapters are still somewhat out of date.

<a name="n8"></a><H2>0.7 How to avoid reading the manual</H2>


If you hate reading manuals, glance at the "Introduction" which
contains a few simple examples. These
examples contain about 95% of everything you need to know to use
SWIG. After that, simply use the language-specific chapters as a reference.
The SWIG distribution also comes with a large directory of
examples that illustrate different topics.

<a name="n9"></a><H2>0.8 Backwards Compatibility</H2>


If you are a previous user of SWIG, don't expect recent versions of
SWIG to provide backwards compatibility.  In fact, backwards
compatibility issues may arise even between successive 1.3.x releases.
Although these incompatibilities are regretable, SWIG-1.3 is an active
development project.  The primary goal of this effort is to make SWIG
better---a process that would simply be impossible if the developers
are constantly bogged down with backwards compatibility issues.

<p>
On a positive note, a few incompatibilities are a small price to pay
for the large number of new features that have been
added---namespaces, templates, smart pointers, overloaded methods,
operators, and more.

<a name="n10"></a><H2>0.9 Credits</H2>


SWIG is an unfunded project that would not be possible without the
contributions of many people.  Most recent SWIG development has been
supported by Matthias K&ouml;ppe, William Fulton, Lyle Johnson,
Richard Palmer, Thien-Thi Nguyen, Jason Stewart, Loic Dachary, Masaki
Fukushima, Luigi Ballabio, Sam Liddicott, Art Yerkes, Marcelo Matus, and Harco de Hilster.

<p>
Historically, the following people contributed to early versions of SWIG.
Peter Lomdahl, Brad Holian, Shujia Zhou, Niels Jensen, and Tim Germann
at Los Alamos National Laboratory were the first users. Patrick
Tullmann at the University of Utah suggested the idea of automatic
documentation generation. John Schmidt and Kurtis Bleeker at the
University of Utah tested out the early versions.  Chris Johnson
supported SWIG's developed at the University of Utah. John Buckman,
Larry Virden, and Tom Schwaller provided valuable input on the first
releases and improving the portability of SWIG. David Fletcher and
Gary Holt have provided a great deal of input on improving SWIG's
Perl5 implementation. Kevin Butler contributed the first Windows NT
port.

<a name="n11"></a><H2>0.10 Bug reports</H2>


Although every attempt has been made to make SWIG bug-free, we are also trying
to make feature improvements that may introduce bugs.
To report a bug, either send mail to the SWIG developer
list at <tt>swig-dev@cs.uchicago.edu</tt> or report a bug
at <tt>http://www.swig.org</tt>. In your report, be as specific as
possible, including (if applicable), error messages, tracebacks (if a
core dump occurred), corresponding portions of the SWIG interface file
used, and any important pieces of the SWIG generated wrapper code.  We
can only fix bugs if we know about them.

<p><hr>
<address>SWIG 1.3 - Last Modified : August 10, 2002</address>
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