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| 1 | <html> | ||
| 2 | <head> | ||
| 3 | <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> | ||
| 4 | <title>2.8. Development Concepts</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-development-environment.html" title="Chapter 2. The Yocto Project Development Environment"> | ||
| 9 | <link rel="prev" href="recipe-syntax.html" title="2.7. Recipe Syntax"> | ||
| 10 | <link rel="next" href="user-configuration.html" title="2.8.1. User Configuration"> | ||
| 11 | </head> | ||
| 12 | <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="section" title="2.8. Development Concepts"> | ||
| 13 | <div class="titlepage"><div><div><h2 class="title" style="clear: both"> | ||
| 14 | <a name="development-concepts"></a>2.8. Development Concepts</h2></div></div></div> | ||
| 15 | <p> | ||
| 16 | This section takes a more detailed look inside the development | ||
| 17 | process. | ||
| 18 | The following diagram represents development at a high level. | ||
| 19 | The remainder of this chapter expands on the fundamental input, output, | ||
| 20 | process, and | ||
| 21 | <a class="link" href="../ref-manual/metadata.html" target="_self">Metadata</a>) blocks | ||
| 22 | that make up development in the Yocto Project environment. | ||
| 23 | </p> | ||
| 24 | <p><a name="general-yocto-environment-figure"></a> | ||
| 25 | </p> | ||
| 26 | <table border="0" summary="manufactured viewport for HTML img" cellspacing="0" cellpadding="0" width="720"><tr style="height: 383px"><td align="center"><img src="figures/yocto-environment-ref.png" align="middle" height="383"></td></tr></table> | ||
| 27 | <p> | ||
| 28 | </p> | ||
| 29 | <p> | ||
| 30 | In general, development consists of several functional areas: | ||
| 31 | </p> | ||
| 32 | <div class="itemizedlist"><ul class="itemizedlist" type="disc"> | ||
| 33 | <li class="listitem"><p><span class="emphasis"><em>User Configuration:</em></span> | ||
| 34 | Metadata you can use to control the build process. | ||
| 35 | </p></li> | ||
| 36 | <li class="listitem"><p><span class="emphasis"><em>Metadata Layers:</em></span> | ||
| 37 | Various layers that provide software, machine, and | ||
| 38 | distro Metadata.</p></li> | ||
| 39 | <li class="listitem"><p><span class="emphasis"><em>Source Files:</em></span> | ||
| 40 | Upstream releases, local projects, and SCMs.</p></li> | ||
| 41 | <li class="listitem"><p><span class="emphasis"><em>Build System:</em></span> | ||
| 42 | Processes under the control of | ||
| 43 | <a class="link" href="../ref-manual/bitbake-term.html" target="_self">BitBake</a>. | ||
| 44 | This block expands on how BitBake fetches source, applies | ||
| 45 | patches, completes compilation, analyzes output for package | ||
| 46 | generation, creates and tests packages, generates images, and | ||
| 47 | generates cross-development tools.</p></li> | ||
| 48 | <li class="listitem"><p><span class="emphasis"><em>Package Feeds:</em></span> | ||
| 49 | Directories containing output packages (RPM, DEB or IPK), | ||
| 50 | which are subsequently used in the construction of an image or | ||
| 51 | SDK, produced by the build system. | ||
| 52 | These feeds can also be copied and shared using a web server or | ||
| 53 | other means to facilitate extending or updating existing | ||
| 54 | images on devices at runtime if runtime package management is | ||
| 55 | enabled.</p></li> | ||
| 56 | <li class="listitem"><p><span class="emphasis"><em>Images:</em></span> | ||
| 57 | Images produced by the development process. | ||
| 58 | </p></li> | ||
| 59 | <li class="listitem"><p><span class="emphasis"><em>Application Development SDK:</em></span> | ||
| 60 | Cross-development tools that are produced along with an image | ||
| 61 | or separately with BitBake.</p></li> | ||
| 62 | </ul></div> | ||
| 63 | <p> | ||
| 64 | </p> | ||
| 65 | </div></body> | ||
| 66 | </html> | ||