Leading embedded systems developer Rudolf Streif gives readers a solid grounding in the basics, then guides them through more advanced topics -- ranging from building board support packages to managing compliance. Students master the Yocto Project toolbox by working through the entire development lifecycle on a realistic project: a distributed home automation system consisting of multiple embedded devices with diverse functionality, all communicating via networking infrastructure. 

 <p style="margin:0px;"><i>Foreword xv</i></p> <p style="margin:0px;"><i>Preface xvii</i></p> <p style="margin:0px;"><i>Acknowledgments xxi</i></p> <p style="margin:0px;"><i>About the Author xxiii</i></p> <p style="margin:0px;">&nbsp;</p> <p style="margin:0px;"><b>Chapter 1: Linux for Embedded Systems 1</b></p> <p style="margin:0px;">1.1 Why Linux for Embedded Systems? 1</p> <p style="margin:0px;">1.2 Embedded Linux Landscape 3</p> <p style="margin:0px;">1.3 A Custom Linux Distribution&ndash;Why Is It Hard? 8</p> <p style="margin:0px;">1.4 A Word about Open Source Licensing 9</p> <p style="margin:0px;">1.5 Organizations, Relevant Bodies, and Standards 11</p> <p style="margin:0px;">1.6 Summary 13</p> <p style="margin:0px;">1.7 References 14</p> <p style="margin:0px;">&nbsp;</p> <p style="margin:0px;"><b>Chapter 2: The Yocto Project 15</b></p> <p style="margin:0px;">2.1 Jumpstarting Your First Yocto Project Build 15</p> <p style="margin:0px;">2.2 The Yocto Project Family 26</p> <p style="margin:0px;">2.3 A Little Bit of History 28</p> <p style="margin:0px;">2.4 Yocto Project Terms 31</p> <p style="margin:0px;">2.5 Summary 33</p> <p style="margin:0px;">2.6 References 34</p> <p style="margin:0px;">&nbsp;</p> <p style="margin:0px;"><b>Chapter 3: OpenEmbedded Build System 35</b></p> <p style="margin:0px;">3.1 Building Open Source Software Packages 35</p> <p style="margin:0px;">3.2 OpenEmbedded Workflow 39</p> <p style="margin:0px;">3.3 OpenEmbedded Build System Architecture 45</p> <p style="margin:0px;">3.4 Summary 56</p> <p style="margin:0px;">3.5 References 57</p> <p style="margin:0px;">&nbsp;</p> <p style="margin:0px;"><b>Chapter 4: BitBake Build Engine 59</b></p> <p style="margin:0px;">4.1 Obtaining and Installing BitBake 59</p> <p style="margin:0px;">4.2 Running BitBake 61</p> <p style="margin:0px;">4.3 BitBake Metadata 70</p> <p style="margin:0px;">4.4 Metadata Syntax 71</p> <p style="margin:0px;">4.5 Source Download 86</p> <p style="margin:0px;">4.6 HelloWorld&ndash;BitBake Style 95</p> <p style="margin:0px;">4.7 Dependency Handling 99</p> <p style="margin:0px;">4.8 Version Selection 102</p> <p style="margin:0px;">4.9 Variants 103</p> <p style="margin:0px;">4.10 Default Metadata 103</p> <p style="margin:0px;">4.11 Summary 107</p> <p style="margin:0px;">4.12 References 108</p> <p style="margin:0px;">&nbsp;</p> <p style="margin:0px;"><b>Chapter 5: Troubleshooting 109</b></p> <p style="margin:0px;">5.1 Logging 110</p> <p style="margin:0px;">5.2 Task Execution 116</p> <p style="margin:0px;">5.3 Analyzing Metadata 119</p> <p style="margin:0px;">5.4 Development Shell 120</p> <p style="margin:0px;">5.5 Dependency Graphs 121</p> <p style="margin:0px;">5.6 Debugging Layers 122</p> <p style="margin:0px;">5.7 Summary 124</p> <p style="margin:0px;">&nbsp;</p> <p style="margin:0px;"><b>Chapter 6: Linux System Architecture 127</b></p> <p style="margin:0px;">6.1 Linux or GNU/Linux? 127</p> <p style="margin:0px;">6.2 Anatomy of a Linux System 128</p> <p style="margin:0px;">6.3 Bootloader 129</p> <p style="margin:0px;">6.4 Kernel 134</p> <p style="margin:0px;">6.5 User Space 141</p> <p style="margin:0px;">6.6 Summary 143</p> <p style="margin:0px;">6.7 References 144</p> <p style="margin:0px;">&nbsp;</p> <p style="margin:0px;"><b>Chapter 7: Building a Custom Linux Distribution 145</b></p> <p style="margin:0px;">7.1 Core Images&ndash;Linux Distribution Blueprints 146</p> <p style="margin:0px;">7.2 Building Images from Scratch 160</p> <p style="margin:0px;">7.3 Image Options 161</p> <p style="margin:0px;">7.4 Distribution Configuration 169</p> <p style="margin:0px;">7.5 External Layers 181</p> <p style="margin:0px;">7.6 Hob 181</p> <p style="margin:0px;">7.7 Summary 184</p> <p style="margin:0px;">&nbsp;</p> <p style="margin:0px;"><b>Chapter 8: Software Package Recipes 185</b></p> <p style="margin:0px;">8.1 Recipe Layout and Conventions 185</p> <p style="margin:0px;">8.2 Writing a New Recipe 196</p> <p style="margin:0px;">8.3 Recipe Examples 212</p> <p style="margin:0px;">8.4 Devtool 218</p> <p style="margin:0px;">8.5 Summary 224</p> <p style="margin:0px;">8.6 References 224</p> <p style="margin:0px;">&nbsp;</p> <p style="margin:0px;"><b>Chapter 9: Kernel Recipes 225</b></p> <p style="margin:0px;">9.1 Kernel Configuration 226</p> <p style="margin:0px;">9.2 Kernel Patches 231</p> <p style="margin:0px;">9.3 Kernel Recipes 233</p> <p style="margin:0px;">9.4 Out-of-Tree Modules 251</p> <p style="margin:0px;">9.5 Device Tree 257</p> <p style="margin:0px;">9.6 Summary 258</p> <p style="margin:0px;">9.7 References 259</p> <p style="margin:0px;">&nbsp;</p> <p style="margin:0px;"><b>Chapter 10: Board Support Packages 261</b></p> <p style="margin:0px;">10.1 Yocto Project BSP Philosophy 261</p> <p style="margin:0px;">10.2 Building with a BSP 265</p> <p style="margin:0px;">10.3 Inside a Yocto Project BSP 277</p> <p style="margin:0px;">10.4 Creating a Yocto Project BSP 282</p> <p style="margin:0px;">10.5 Tuning 289</p> <p style="margin:0px;">10.6 Creating Bootable Media Images 290</p> <p style="margin:0px;">10.7 Summary 299</p> <p style="margin:0px;">10.8 References 299</p> <p style="margin:0px;">&nbsp;</p> <p style="margin:0px;"><b>Chapter 11: Application Development 301</b></p> <p style="margin:0px;">11.1 Inside a Yocto Project ADT 302</p> <p style="margin:0px;">11.2 Setting Up a Yocto Project ADT 304</p> <p style="margin:0px;">11.3 Building Applications 315</p> <p style="margin:0px;">11.4 Eclipse Integration 317</p> <p style="margin:0px;">11.5 Application Development Using an Emulated Target 331</p> <p style="margin:0px;">11.6 Summary 333</p> <p style="margin:0px;">11.7 References 334</p> <p style="margin:0px;">&nbsp;</p> <p style="margin:0px;"><b>Chapter 12: Licensing and Compliance 335</b></p> <p style="margin:0px;">12.1 Managing Licenses 335</p> <p style="margin:0px;">12.2 Managing Source Code 341</p> <p style="margin:0px;">12.3 Summary 343</p> <p style="margin:0px;">12.4 References 344</p> <p style="margin:0px;">&nbsp;</p> <p style="margin:0px;"><b>Chapter 13: Advanced Topics 345</b></p> <p style="margin:0px;">13.1 Toaster 345</p> <p style="margin:0px;">13.2 Build History 358</p> <p style="margin:0px;">13.3 Source Mirrors 366</p> <p style="margin:0px;">13.4 Autobuilder 368</p> <p style="margin:0px;">13.5 Summary 374</p> <p style="margin:0px;">13.6 References 375</p> <p style="margin:0px;">&nbsp;</p> <p style="margin:0px;"><b>Appendix A: Open Source Licenses 377</b></p> <p style="margin:0px;">A.1 MIT License (MIT) 377</p> <p style="margin:0px;">A.2 GNU General Public License (GPL) Version 2 378</p> <p style="margin:0px;">A.3 GNU General Public License (GPL) Version 3 384</p> <p style="margin:0px;">A.4 Apache License Version 2.0 397</p> <p style="margin:0px;">&nbsp;</p> <p style="margin:0px;"><b>Appendix B: Metadata Reference 403</b></p> <p style="margin:0px;">&nbsp;</p> <p style="margin:0px;"></p><p style="margin:0px;"><i>Index 429</i>&nbsp;</p>   

<p><em>Foreword xv</em></p><p><em>Preface xvii</em></p><p><em>Acknowledgments xxi</em></p><p><em>About the Author xxiii</em></p><p><strong>Chapter 1: Linux for Embedded Systems 1</strong></p><p>1.1 Why Linux for Embedded Systems? 1</p><p>1.2 Embedded Linux Landscape 3</p><p>1.3 A Custom Linux Distribution&ndash;Why Is It Hard? 8</p><p>1.4 A Word about Open Source Licensing 9</p><p>1.5 Organizations, Relevant Bodies, and Standards 11</p><p>1.6 Summary 13</p><p>1.7 References 14</p><p><strong>Chapter 2: The Yocto Project 15</strong></p><p>2.1 Jumpstarting Your First Yocto Project Build 15</p><p>2.2 The Yocto Project Family 26</p><p>2.3 A Little Bit of History 28</p><p>2.4 Yocto Project Terms 31</p><p>2.5 Summary 33</p><p>2.6 References 34</p><p><strong>Chapter 3: OpenEmbedded Build System 35</strong></p><p>3.1 Building Open Source Software Packages 35</p><p>3.2 OpenEmbedded Workflow 39</p><p>3.3 OpenEmbedded Build System Architecture 45</p><p>3.4 Summary 56</p><p>3.5 References 57</p><p><strong>Chapter 4: BitBake Build Engine 59</strong></p><p>4.1 Obtaining and Installing BitBake 59</p><p>4.2 Running BitBake 61</p><p>4.3 BitBake Metadata 70</p><p>4.4 Metadata Syntax 71</p><p>4.5 Source Download 86</p><p>4.6 HelloWorld&ndash;BitBake Style 95</p><p>4.7 Dependency Handling 99</p><p>4.8 Version Selection 102</p><p>4.9 Variants 103</p><p>4.10 Default Metadata 103</p><p>4.11 Summary 107</p><p>4.12 References 108</p><p><strong>Chapter 5: Troubleshooting 109</strong></p><p>5.1 Logging 110</p><p>5.2 Task Execution 116</p><p>5.3 Analyzing Metadata 119</p><p>5.4 Development Shell 120</p><p>5.5 Dependency Graphs 121</p><p>5.6 Debugging Layers 122</p><p>5.7 Summary 124</p><p><strong>Chapter 6: Linux System Architecture 127</strong></p><p>6.1 Linux or GNU/Linux? 127</p><p>6.2 Anatomy of a Linux System 128</p><p>6.3 Bootloader 129</p><p>6.4 Kernel 134</p><p>6.5 User Space 141</p><p>6.6 Summary 143</p><p>6.7 References 144</p><p><strong>Chapter 7: Building a Custom Linux Distribution 145</strong></p><p>7.1 Core Images&ndash;Linux Distribution Blueprints 146</p><p>7.2 Building Images from Scratch 160</p><p>7.3 Image Options 161</p><p>7.4 Distribution Configuration 169</p><p>7.5 External Layers 181</p><p>7.6 Hob 181</p><p>7.7 Summary 184</p><p><strong>Chapter 8: Software Package Recipes 185</strong></p><p>8.1 Recipe Layout and Conventions 185</p><p>8.2 Writing a New Recipe 196</p><p>8.3 Recipe Examples 212</p><p>8.4 Devtool 218</p><p>8.5 Summary 224</p><p>8.6 References 224</p><p><strong>Chapter 9: Kernel Recipes 225</strong></p><p>9.1 Kernel Configuration 226</p><p>9.2 Kernel Patches 231</p><p>9.3 Kernel Recipes 233</p><p>9.4 Out-of-Tree Modules 251</p><p>9.5 Device Tree 257</p><p>9.6 Summary 258</p><p>9.7 References 259</p><p><strong>Chapter 10: Board Support Packages 261</strong></p><p>10.1 Yocto Project BSP Philosophy 261</p><p>10.2 Building with a BSP 265</p><p>10.3 Inside a Yocto Project BSP 277</p><p>10.4 Creating a Yocto Project BSP 282</p><p>10.5 Tuning 289</p><p>10.6 Creating Bootable Media Images 290</p><p>10.7 Summary 299</p><p>10.8 References 299</p><p><strong>Chapter 11: Application Development 301</strong></p><p>11.1 Inside a Yocto Project ADT 302</p><p>11.2 Setting Up a Yocto Project ADT 304</p><p>11.3 Building Applications 315</p><p>11.4 Eclipse Integration 317</p><p>11.5 Application Development Using an Emulated Target 331</p><p>11.6 Summary 333</p><p>11.7 References 334</p><p><strong>Chapter 12: Licensing and Compliance 335</strong></p><p>12.1 Managing Licenses 335</p><p>12.2 Managing Source Code 341</p><p>12.3 Summary 343</p><p>12.4 References 344</p><p><strong>Chapter 13: Advanced Topics 345</strong></p><p>13.1 Toaster 345</p><p>13.2 Build History 358</p><p>13.3 Source Mirrors 366</p><p>13.4 Autobuilder 368</p><p>13.5 Summary 374</p><p>13.6 References 375</p><p><strong>Appendix A: Open Source Licenses 377</strong></p><p>A.1 MIT License (MIT) 377</p><p>A.2 GNU General Public License (GPL) Version 2 378</p><p>A.3 GNU General Public License (GPL) Version 3 384</p><p>A.4 Apache License Version 2.0 397</p><p><strong>Appendix B: Metadata Reference 403</strong></p><p><em>Index 429</em></p> 

<ul>
    <li>
    <div style="MARGIN: 0px">Chapter 1: Linux for Embedded Systems</div>
    </li>
    <li>
    <div style="MARGIN: 0px">Chapter 2: The Yocto Project</div>
    </li>
    <li>
    <div style="MARGIN: 0px">Chapter 3: OpenEmbedded Build System</div>
    </li>
    <li>
    <div style="MARGIN: 0px">Chapter 4: BitBake Build Engine</div>
    </li>
    <li>
    <div style="MARGIN: 0px">Chapter 5: Troubleshooting </div>
    </li>
    <li>
    <div style="MARGIN: 0px">Chapter 6: Linux System Architecture</div>
    </li>
    <li>
    <div style="MARGIN: 0px">Chapter 7: Building a Custom Linux Distribution</div>
    </li>
    <li>
    <div style="MARGIN: 0px">Chapter 8: Software Package Recipes </div>
    </li>
    <li>
    <div style="MARGIN: 0px">Chapter 9: Kernel Recipes</div>
    </li>
    <li>
    <div style="MARGIN: 0px">Chapter 10: Board Support Packages</div>
    </li>
    <li>
    <div style="MARGIN: 0px">Chapter 11: Application Development</div>
    </li>
    <li>
    <div style="MARGIN: 0px">Chapter 12: Licensing and Compliance</div>
    </li>
    <li>
    <div style="MARGIN: 0px">Chapter 13: Advanced Topics</div>
    </li>
    <li>
    <div style="MARGIN: 0px">Appendix A: Open Source Licenses </div>
    </li>
    <li>
    <div style="MARGIN: 0px">Appendix B: Metadata Reference</div>
    </li>
</ul>

Rudolf J. Streif

Embedded Linux Systems with the Yocto Project

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Embedded Linux Systems with the Yocto Project, 1st edition