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| 1 | <html> | ||
| 2 | <head> | ||
| 3 | <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> | ||
| 4 | <title>3.1. Yocto Project Components</title> | ||
| 5 | <link rel="stylesheet" type="text/css" href="../book.css"> | ||
| 6 | <meta name="generator" content="DocBook XSL Stylesheets V1.76.1"> | ||
| 7 | <link rel="home" href="index.html" title="Getting Started With Yocto Project"> | ||
| 8 | <link rel="up" href="overview-concepts.html" title="Chapter 3. Yocto Project Concepts"> | ||
| 9 | <link rel="prev" href="overview-concepts.html" title="Chapter 3. Yocto Project Concepts"> | ||
| 10 | <link rel="next" href="usingpoky-components-bitbake.html" title="3.1.1. BitBake"> | ||
| 11 | </head> | ||
| 12 | <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="section" title="3.1. Yocto Project Components"> | ||
| 13 | <div class="titlepage"><div><div><h2 class="title" style="clear: both"> | ||
| 14 | <a name="yocto-project-components"></a>3.1. Yocto Project Components</h2></div></div></div> | ||
| 15 | <p> | ||
| 16 | The | ||
| 17 | <a class="link" href="../ref-manual/bitbake-term.html" target="_self">BitBake</a> | ||
| 18 | task executor together with various types of configuration files | ||
| 19 | form the OpenEmbedded Core. | ||
| 20 | This section overviews these components by describing their use and | ||
| 21 | how they interact. | ||
| 22 | </p> | ||
| 23 | <p> | ||
| 24 | BitBake handles the parsing and execution of the data files. | ||
| 25 | The data itself is of various types: | ||
| 26 | </p> | ||
| 27 | <div class="itemizedlist"><ul class="itemizedlist" type="disc"> | ||
| 28 | <li class="listitem"><p> | ||
| 29 | <span class="emphasis"><em>Recipes:</em></span> | ||
| 30 | Provides details about particular pieces of software. | ||
| 31 | </p></li> | ||
| 32 | <li class="listitem"><p> | ||
| 33 | <span class="emphasis"><em>Class Data:</em></span> | ||
| 34 | Abstracts common build information (e.g. how to build a | ||
| 35 | Linux kernel). | ||
| 36 | </p></li> | ||
| 37 | <li class="listitem"><p> | ||
| 38 | <span class="emphasis"><em>Configuration Data:</em></span> | ||
| 39 | Defines machine-specific settings, policy decisions, and | ||
| 40 | so forth. | ||
| 41 | Configuration data acts as the glue to bind everything | ||
| 42 | together. | ||
| 43 | </p></li> | ||
| 44 | </ul></div> | ||
| 45 | <p> | ||
| 46 | </p> | ||
| 47 | <p> | ||
| 48 | BitBake knows how to combine multiple data sources together and | ||
| 49 | refers to each data source as a layer. | ||
| 50 | For information on layers, see the | ||
| 51 | "<a class="link" href="../dev-manual/understanding-and-creating-layers.html" target="_self">Understanding and Creating Layers</a>" | ||
| 52 | section of the Yocto Project Development Tasks Manual. | ||
| 53 | </p> | ||
| 54 | <p> | ||
| 55 | Following are some brief details on these core components. | ||
| 56 | For additional information on how these components interact during | ||
| 57 | a build, see the | ||
| 58 | "<a class="link" href="development-concepts.html" title="2.8. Development Concepts">Development Concepts</a>" | ||
| 59 | section. | ||
| 60 | </p> | ||
| 61 | </div></body> | ||
| 62 | </html> | ||