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A GNU Manual
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<a name="GNU-Objective-C-runtime-API"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="Executing-code-before-main.html#Executing-code-before-main">Executing code before main</a>,
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Up: <a rel="up" accesskey="u" href="Objective_002dC.html#Objective_002dC">Objective-C</a>
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<h3 class="section">8.1 GNU Objective-C Runtime API</h3>
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<p>This section is specific for the GNU Objective-C runtime. If you are
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using a different runtime, you can skip it.
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<p>The GNU Objective-C runtime provides an API that allows you to
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interact with the Objective-C runtime system, querying the live
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runtime structures and even manipulating them. This allows you for
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example to inspect and navigate classes, methods and protocols; to
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define new classes or new methods, and even to modify existing classes
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or protocols.
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<p>If you are using a “Foundation” library such as GNUstep-Base, this
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library will provide you with a rich set of functionality to do most
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of the inspection tasks, and you probably will only need direct access
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to the GNU Objective-C runtime API to define new classes or methods.
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<ul class="menu">
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<li><a accesskey="1" href="Modern-GNU-Objective_002dC-runtime-API.html#Modern-GNU-Objective_002dC-runtime-API">Modern GNU Objective-C runtime API</a>
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<li><a accesskey="2" href="Traditional-GNU-Objective_002dC-runtime-API.html#Traditional-GNU-Objective_002dC-runtime-API">Traditional GNU Objective-C runtime API</a>
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</ul>
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