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| <title>SWIG:Examples:ruby</title> |
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| <H1>SWIG Ruby Examples</H1> |
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| <p> |
| The following examples illustrate the use of SWIG with Ruby. |
| |
| <ul> |
| <li><a href="simple/index.html">simple</a>. A minimal example showing how SWIG can |
| be used to wrap a C function, a global variable, and a constant. |
| <li><a href="constants/index.html">constants</a>. This shows how preprocessor macros and |
| certain C declarations are turned into constants. |
| <li><a href="variables/index.html">variables</a>. An example showing how to access C global variables from Ruby. |
| <li><a href="value/index.html">value</a>. How to pass and return structures by value. |
| <li><a href="class/index.html">class</a>. Wrapping a simple C++ class. |
| <li><a href="reference/index.html">reference</a>. C++ references. |
| <li><a href="pointer/index.html">pointer</a>. Simple pointer handling. |
| <li><a href="funcptr/index.html">funcptr</a>. Pointers to functions. |
| <li><a href="enum/index.html">enum</a>. Enumeration. |
| </ul> |
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| <h2>Compilation Issues</h2> |
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| <ul> |
| <li>To create a Ruby extension, SWIG is run with the following options: |
| |
| <blockquote> |
| <pre> |
| % swig -ruby interface.i |
| </pre> |
| </blockquote> |
| |
| <li> |
| Please see the <a href="../../Doc/Manual/Windows.html">Windows</a> page in the main manual for information on using the examples on Windows. <p> |
| </li> |
| |
| <li>On Unix the compilation of examples is done using the file <tt>Example/Makefile</tt>. This |
| makefile performs a manual module compilation which is platform specific. Typically, |
| the steps look like this (Linux): |
| |
| <blockquote> |
| <pre> |
| % swig -ruby interface.i |
| % gcc -fpic -c interface_wrap.c -I/usr/local/lib/ruby/1.4/i686-linux |
| % gcc -shared interface_wrap.o $(OBJS) -o interface.so |
| % ruby |
| require 'interface' |
| Interface.blah(...) |
| ... |
| </pre> |
| </blockquote> |
| |
| <li>The politically "correct" way to compile a Ruby extension is to follow the steps |
| described <tt>README.EXT</tt> in Ruby distribution: |
| |
| <p> |
| <ol> |
| <li>Create a file called <tt>extconf.rb</tt> that looks like the following: |
| |
| <blockquote> |
| <pre> |
| require 'mkmf' |
| create_makefile('interface') |
| </pre> |
| </blockquote> |
| <li>Type the following to build the extension: |
| |
| <blockquote> |
| <pre> |
| % ruby extconf.rb |
| % make |
| </pre> |
| </blockquote> |
| </ol> |
| </ul> |
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| <h2>Compatibility</h2> |
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| The examples have been extensively tested on the following platforms: |
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| <ul> |
| <li>Linux |
| </ul> |
| |
| Your mileage may vary. If you experience a problem, please let us know by |
| contacting us on the <a href="https://www.swig.org/mail.html">mailing lists</a>. |
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