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| 1 | <html> | ||
| 2 | <head> | ||
| 3 | <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> | ||
| 4 | <title>2.8.5.6. SDK Generation</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="bitbake-dev-environment.html" title="2.8.5. BitBake"> | ||
| 9 | <link rel="prev" href="image-generation-dev-environment.html" title="2.8.5.5. Image Generation"> | ||
| 10 | <link rel="next" href="stamp-files-and-the-rerunning-of-tasks.html" title="2.8.5.7. Stamp Files and the Rerunning of Tasks"> | ||
| 11 | </head> | ||
| 12 | <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="section" title="2.8.5.6. SDK Generation"> | ||
| 13 | <div class="titlepage"><div><div><h4 class="title"> | ||
| 14 | <a name="sdk-generation-dev-environment"></a>2.8.5.6. SDK Generation</h4></div></div></div> | ||
| 15 | <p> | ||
| 16 | The OpenEmbedded build system uses BitBake to generate the | ||
| 17 | Software Development Kit (SDK) installer script for both the | ||
| 18 | standard and extensible SDKs: | ||
| 19 | <img src="figures/sdk-generation.png" align="middle"> | ||
| 20 | </p> | ||
| 21 | <div class="note" title="Note" style="margin-left: 0.5in; margin-right: 0.5in;"> | ||
| 22 | <h3 class="title">Note</h3> | ||
| 23 | For more information on the cross-development toolchain | ||
| 24 | generation, see the | ||
| 25 | "<a class="link" href="cross-development-toolchain-generation.html" title="3.2. Cross-Development Toolchain Generation">Cross-Development Toolchain Generation</a>" | ||
| 26 | section. | ||
| 27 | For information on advantages gained when building a | ||
| 28 | cross-development toolchain using the | ||
| 29 | <a class="link" href="../ref-manual/ref-tasks-populate_sdk.html" target="_self"><code class="filename">do_populate_sdk</code></a> | ||
| 30 | task, see the | ||
| 31 | "<a class="link" href="../sdk-manual/sdk-building-an-sdk-installer.html" target="_self">Building an SDK Installer</a>" | ||
| 32 | section in the Yocto Project Application Development and the | ||
| 33 | Extensible Software Development Kit (SDK) manual. | ||
| 34 | </div> | ||
| 35 | <p> | ||
| 36 | Like image generation, the SDK script process consists of | ||
| 37 | several stages and depends on many variables. | ||
| 38 | The <code class="filename">do_populate_sdk</code> and | ||
| 39 | <code class="filename">do_populate_sdk_ext</code> tasks use these | ||
| 40 | key variables to help create the list of packages to actually | ||
| 41 | install. | ||
| 42 | For information on the variables listed in the figure, see the | ||
| 43 | "<a class="link" href="sdk-dev-environment.html" title="2.8.7. Application Development SDK">Application Development SDK</a>" | ||
| 44 | section. | ||
| 45 | </p> | ||
| 46 | <p> | ||
| 47 | The <code class="filename">do_populate_sdk</code> task helps create | ||
| 48 | the standard SDK and handles two parts: a target part and a | ||
| 49 | host part. | ||
| 50 | The target part is the part built for the target hardware and | ||
| 51 | includes libraries and headers. | ||
| 52 | The host part is the part of the SDK that runs on the | ||
| 53 | <a class="link" href="../ref-manual/var-SDKMACHINE.html" target="_self"><code class="filename">SDKMACHINE</code></a>. | ||
| 54 | </p> | ||
| 55 | <p> | ||
| 56 | The <code class="filename">do_populate_sdk_ext</code> task helps create | ||
| 57 | the extensible SDK and handles host and target parts | ||
| 58 | differently than its counter part does for the standard SDK. | ||
| 59 | For the extensible SDK, the task encapsulates the build system, | ||
| 60 | which includes everything needed (host and target) for the SDK. | ||
| 61 | </p> | ||
| 62 | <p> | ||
| 63 | Regardless of the type of SDK being constructed, the | ||
| 64 | tasks perform some cleanup after which a cross-development | ||
| 65 | environment setup script and any needed configuration files | ||
| 66 | are created. | ||
| 67 | The final output is the Cross-development | ||
| 68 | toolchain installation script (<code class="filename">.sh</code> file), | ||
| 69 | which includes the environment setup script. | ||
| 70 | </p> | ||
| 71 | </div></body> | ||
| 72 | </html> | ||