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1<html>
2<head>
3<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
4<title>2.8.5.3. Configuration and Compilation</title>
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8<link rel="up" href="bitbake-dev-environment.html" title="2.8.5. BitBake">
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12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="section" title="2.8.5.3. Configuration and Compilation">
13<div class="titlepage"><div><div><h4 class="title">
14<a name="configuration-and-compilation-dev-environment"></a>2.8.5.3. Configuration and Compilation</h4></div></div></div>
15<p>
16 After source code is patched, BitBake executes tasks that
17 configure and compile the source code:
18 </p>
19<table border="0" summary="manufactured viewport for HTML img" cellspacing="0" cellpadding="0" width="630"><tr style="height: 450px"><td align="center"><img src="figures/configuration-compile-autoreconf.png" align="middle" width="630"></td></tr></table>
20<p>
21 </p>
22<p>
23 This step in the build process consists of three tasks:
24 </p>
25<div class="itemizedlist"><ul class="itemizedlist" type="disc">
26<li class="listitem"><p>
27 <span class="emphasis"><em><a class="link" href="../ref-manual/ref-tasks-prepare_recipe_sysroot.html" target="_self"><code class="filename">do_prepare_recipe_sysroot</code></a>:</em></span>
28 This task sets up the two sysroots in
29 <code class="filename">${</code><a class="link" href="../ref-manual/var-WORKDIR.html" target="_self"><code class="filename">WORKDIR</code></a><code class="filename">}</code>
30 (i.e. <code class="filename">recipe-sysroot</code> and
31 <code class="filename">recipe-sysroot-native</code>) so that
32 the sysroots contain the contents of the
33 <a class="link" href="../ref-manual/ref-tasks-populate_sysroot.html" target="_self"><code class="filename">do_populate_sysroot</code></a>
34 tasks of the recipes on which the recipe
35 containing the tasks depends.
36 A sysroot exists for both the target and for the native
37 binaries, which run on the host system.
38 </p></li>
39<li class="listitem">
40<p><span class="emphasis"><em><code class="filename">do_configure</code>:</em></span>
41 This task configures the source by enabling and
42 disabling any build-time and configuration options for
43 the software being built.
44 Configurations can come from the recipe itself as well
45 as from an inherited class.
46 Additionally, the software itself might configure itself
47 depending on the target for which it is being built.
48 </p>
49<p>The configurations handled by the
50 <a class="link" href="../ref-manual/ref-tasks-configure.html" target="_self"><code class="filename">do_configure</code></a>
51 task are specific
52 to source code configuration for the source code
53 being built by the recipe.</p>
54<p>If you are using the
55 <a class="link" href="../ref-manual/ref-classes-autotools.html" target="_self"><code class="filename">autotools</code></a>
56 class,
57 you can add additional configuration options by using
58 the
59 <a class="link" href="../ref-manual/var-EXTRA_OECONF.html" target="_self"><code class="filename">EXTRA_OECONF</code></a>
60 or
61 <a class="link" href="../ref-manual/var-PACKAGECONFIG_CONFARGS.html" target="_self"><code class="filename">PACKAGECONFIG_CONFARGS</code></a>
62 variables.
63 For information on how this variable works within
64 that class, see the
65 <code class="filename">meta/classes/autotools.bbclass</code> file.
66 </p>
67</li>
68<li class="listitem"><p><span class="emphasis"><em><code class="filename">do_compile</code>:</em></span>
69 Once a configuration task has been satisfied, BitBake
70 compiles the source using the
71 <a class="link" href="../ref-manual/ref-tasks-compile.html" target="_self"><code class="filename">do_compile</code></a>
72 task.
73 Compilation occurs in the directory pointed to by the
74 <a class="link" href="../ref-manual/var-B.html" target="_self"><code class="filename">B</code></a>
75 variable.
76 Realize that the <code class="filename">B</code> directory is, by
77 default, the same as the
78 <a class="link" href="../ref-manual/var-S.html" target="_self"><code class="filename">S</code></a>
79 directory.</p></li>
80<li class="listitem"><p><span class="emphasis"><em><code class="filename">do_install</code>:</em></span>
81 Once compilation is done, BitBake executes the
82 <a class="link" href="../ref-manual/ref-tasks-install.html" target="_self"><code class="filename">do_install</code></a>
83 task.
84 This task copies files from the <code class="filename">B</code>
85 directory and places them in a holding area pointed to
86 by the
87 <a class="link" href="../ref-manual/var-D.html" target="_self"><code class="filename">D</code></a>
88 variable.</p></li>
89</ul></div>
90<p>
91 </p>
92</div></body>
93</html>
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