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<title>Updating a Precompiled File Automatically</title>
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<h3>Updating a Precompiled File Automatically</h3>
<p>Use the Carbide IDE’s project manager to update a precompiled header automatically. The IDE creates a precompiled file from a source code file during a compile, update, or make operation if the source code file meets these criteria:</p>
<ul>
<li>The text file name ends with .pch (for C header files) or .pch++ (for C++ header files)</li>
<li> The file is in a project’s build target</li>
<li>The file uses the pragma precompile_target pragma</li>
<li>The file, or files it depends on, have been modified</li>
</ul>
<p class="fix">See the Carbide IDE User Guide for information on how the IDE determines that a file must be updated.</p>
<p>The IDE uses the build target’s settings to preprocess and precompile files.<br />
</p>
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