35 lines
2.1 KiB
HTML
35 lines
2.1 KiB
HTML
<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>6.3. Dependencies</title>
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<link rel="stylesheet" type="text/css" href="../book.css">
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<meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
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<link rel="home" href="index.html" title="The Yocto Project Reference Manual">
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<link rel="up" href="ref-bitbake.html" title="Chapter 6. BitBake">
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<link rel="prev" href="ref-bitbake-providers.html" title="6.2. Preferences and Providers">
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<link rel="next" href="ref-bitbake-tasklist.html" title="6.4. The Task List">
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</head>
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="section" title="6.3. Dependencies">
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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
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<a name="ref-bitbake-dependencies"></a>6.3. Dependencies</h2></div></div></div>
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<p>
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Each target BitBake builds consists of multiple tasks such as
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<code class="filename">fetch</code>, <code class="filename">unpack</code>,
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<code class="filename">patch</code>, <code class="filename">configure</code>,
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and <code class="filename">compile</code>.
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For best performance on multi-core systems, BitBake considers each task as an independent
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entity with its own set of dependencies.
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</p>
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<p>
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Dependencies are defined through several variables.
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You can find information about variables BitBake uses in the BitBake documentation,
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which is found in the <code class="filename">bitbake/doc/manual</code> directory within the
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<a class="link" href="../dev-manual/source-directory.html" target="_self">Source Directory</a>.
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At a basic level, it is sufficient to know that BitBake uses the
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<code class="filename"><a class="link" href="ref-variables-glos.html#var-DEPENDS" title="DEPENDS">DEPENDS</a></code> and
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<code class="filename"><a class="link" href="ref-variables-glos.html#var-RDEPENDS" title="RDEPENDS">RDEPENDS</a></code> variables when
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calculating dependencies.
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</p>
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</div></body>
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</html>
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