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 | 4 | <title>Appendix B. Boost.Build v2 architecture</title> | 
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 | 33 | </div> | 
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 | 34 | <div class="appendix" lang="en"> | 
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 | 35 | <div class="titlepage"><div><div><h2 class="title"> | 
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 | 36 | <a name="bbv2.arch"></a>Appendix B. Boost.Build v2 architecture</h2></div></div></div> | 
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 | 37 | <div class="toc"> | 
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 | 38 | <p><b>Table of Contents</b></p> | 
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 | 39 | <dl> | 
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 | 40 | <dt><span class="section"><a href="arch.html#bbv2.arch.overview">Overview</a></span></dt> | 
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 | 41 | <dt><span class="section"><a href="arch/build.html">The build layer</a></span></dt> | 
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 | 42 | <dd><dl> | 
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 | 43 | <dt><span class="section"><a href="arch/build.html#bbv2.arch.metatargets">Metatargets</a></span></dt> | 
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 | 44 | <dt><span class="section"><a href="arch/build.html#bbv2.arch.virtual">Virtual targets</a></span></dt> | 
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 | 45 | <dt><span class="section"><a href="arch/build.html#bbv2.arch.properties"></a></span></dt> | 
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 | 46 | </dl></dd> | 
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 | 47 | <dt><span class="section"><a href="arch/tools.html">The tools layer</a></span></dt> | 
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 | 48 | <dt><span class="section"><a href="arch/targets.html">Targets</a></span></dt> | 
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 | 49 | <dd><dl><dt><span class="section"><a href="arch/targets.html#bbv2.arch.depends">Dependency scanning</a></span></dt></dl></dd> | 
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 | 50 | </dl> | 
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 | 51 | </div> | 
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 | 52 | <div class="sidebar"><p>This document is work-in progress. Don't expect much from it | 
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 | 53 |       yet.</p></div> | 
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 | 54 | <div class="section" lang="en"> | 
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 | 55 | <div class="titlepage"><div><div><h2 class="title" style="clear: both"> | 
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 | 56 | <a name="bbv2.arch.overview"></a>Overview</h2></div></div></div> | 
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 | 57 | <p>The Boost.Build code is structured in four different components: | 
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 | 58 |     "kernel", "util", "build" and "tools". The first two are relatively | 
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 | 59 |     uninteresting, so we'll focus on the remaining pair. The "build" component | 
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 | 60 |     provides classes necessary to declare targets, determine which properties | 
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 | 61 |     should be used for their building, and for creating the dependency | 
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 | 62 |     graph. The "tools" component provides user-visible functionality. It | 
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 | 63 |     mostly allows to declare specific kind of main targets, and declare | 
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 | 64 |     avaiable tools, which are then used when creating the dependency graph. | 
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 | 65 |     </p> | 
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 | 69 | <td align="left"></td> | 
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 | 70 | <td align="right"><small></small></td> | 
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