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<h1 class="title">Porting Qt for Embedded Linux to a New Architecture</h1>
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<p>When porting <a href="qt-embedded-linux.html">Qt for Embedded Linux</a> to a new architecture there are several issues to be aware of: You must provide suitable hardware drivers, and you must ensure to implement platform dependent atomic operations to enable multithreading on the new architecture.</p>
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<p>When running a <a href="qt-embedded-linux.html">Qt for Embedded Linux</a> application, it either runs as a server or connects to an existing server. All system generated events, including keyboard and mouse events, are passed to the server application which then propagates the event to the appropriate client. When rendering, the default behavior is for each client to render its widgets into memory while the server is responsible for putting the contents of the memory onto the screen.</p>
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<h2>Atomic Operations</h2>
<p>Qt uses an optimization called <a href="shared.html">implicit sharing</a> for many of its value classes; implicitly shared classes can safely be copied across threads. This technology is implemented using atomic operations; i.e., <a href="qt-embedded-linux.html">Qt for Embedded Linux</a> requires that platform-specific atomic operations are implemented to support Linux.</p>
<p>When porting <a href="qt-embedded-linux.html">Qt for Embedded Linux</a> to a new architecture, it is important to ensure that the platform-specific atomic operations are implemented in a corresponding header file, and that this file is located in Qt's <tt>src/corelib/arch</tt> directory.</p>
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