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1<html>
2<head>
3<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
4<title>2.8.4. Package Feeds</title>
5<link rel="stylesheet" type="text/css" href="../book.css">
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7<link rel="home" href="index.html" title="Getting Started With Yocto Project">
8<link rel="up" href="development-concepts.html" title="2.8. Development Concepts">
9<link rel="prev" href="source-mirrors.html" title="2.8.3.4. Source Mirror(s)">
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11</head>
12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="section" title="2.8.4. Package Feeds">
13<div class="titlepage"><div><div><h3 class="title">
14<a name="package-feeds-dev-environment"></a>2.8.4. Package Feeds</h3></div></div></div>
15<p>
16 When the OpenEmbedded build system generates an image or an SDK,
17 it gets the packages from a package feed area located in the
18 <a class="link" href="../ref-manual/build-directory.html" target="_self">Build Directory</a>.
19 The
20 <a class="link" href="development-concepts.html#general-yocto-environment-figure">general Yocto Project Development Environment figure</a>
21 shows this package feeds area in the upper-right corner.
22 </p>
23<p>
24 This section looks a little closer into the package feeds area used
25 by the build system.
26 Here is a more detailed look at the area:
27 </p>
28<table border="0" summary="manufactured viewport for HTML img" cellspacing="0" cellpadding="0" width="630"><tr style="height: 540px"><td align="center"><img src="figures/package-feeds.png" align="middle" width="630"></td></tr></table>
29<p>
30 </p>
31<p>
32 Package feeds are an intermediary step in the build process.
33 The OpenEmbedded build system provides classes to generate
34 different package types, and you specify which classes to enable
35 through the
36 <a class="link" href="../ref-manual/var-PACKAGE_CLASSES.html" target="_self"><code class="filename">PACKAGE_CLASSES</code></a>
37 variable.
38 Before placing the packages into package feeds,
39 the build process validates them with generated output quality
40 assurance checks through the
41 <a class="link" href="../ref-manual/ref-classes-insane.html" target="_self"><code class="filename">insane</code></a>
42 class.
43 </p>
44<p>
45 The package feed area resides in the Build Directory.
46 The directory the build system uses to temporarily store packages
47 is determined by a combination of variables and the particular
48 package manager in use.
49 See the "Package Feeds" box in the illustration and note the
50 information to the right of that area.
51 In particular, the following defines where package files are
52 kept:
53 </p>
54<div class="itemizedlist"><ul class="itemizedlist" type="disc">
55<li class="listitem"><p><a class="link" href="../ref-manual/var-DEPLOY_DIR.html" target="_self"><code class="filename">DEPLOY_DIR</code></a>:
56 Defined as <code class="filename">tmp/deploy</code> in the Build
57 Directory.
58 </p></li>
59<li class="listitem"><p><code class="filename">DEPLOY_DIR_*</code>:
60 Depending on the package manager used, the package type
61 sub-folder.
62 Given RPM, IPK, or DEB packaging and tarball creation, the
63 <a class="link" href="../ref-manual/var-DEPLOY_DIR_RPM.html" target="_self"><code class="filename">DEPLOY_DIR_RPM</code></a>,
64 <a class="link" href="../ref-manual/var-DEPLOY_DIR_IPK.html" target="_self"><code class="filename">DEPLOY_DIR_IPK</code></a>,
65 <a class="link" href="../ref-manual/var-DEPLOY_DIR_DEB.html" target="_self"><code class="filename">DEPLOY_DIR_DEB</code></a>,
66 or
67 <a class="link" href="../ref-manual/var-DEPLOY_DIR_TAR.html" target="_self"><code class="filename">DEPLOY_DIR_TAR</code></a>,
68 variables are used, respectively.
69 </p></li>
70<li class="listitem"><p><a class="link" href="../ref-manual/var-PACKAGE_ARCH.html" target="_self"><code class="filename">PACKAGE_ARCH</code></a>:
71 Defines architecture-specific sub-folders.
72 For example, packages could exist for the i586 or qemux86
73 architectures.
74 </p></li>
75</ul></div>
76<p>
77 </p>
78<p>
79 BitBake uses the <code class="filename">do_package_write_*</code> tasks to
80 generate packages and place them into the package holding area (e.g.
81 <code class="filename">do_package_write_ipk</code> for IPK packages).
82 See the
83 "<a class="link" href="../ref-manual/ref-tasks-package_write_deb.html" target="_self"><code class="filename">do_package_write_deb</code></a>",
84 "<a class="link" href="../ref-manual/ref-tasks-package_write_ipk.html" target="_self"><code class="filename">do_package_write_ipk</code></a>",
85 "<a class="link" href="../ref-manual/ref-tasks-package_write_rpm.html" target="_self"><code class="filename">do_package_write_rpm</code></a>",
86 and
87 "<a class="link" href="../ref-manual/ref-tasks-package_write_tar.html" target="_self"><code class="filename">do_package_write_tar</code></a>"
88 sections for additional information.
89 As an example, consider a scenario where an IPK packaging manager
90 is being used and package architecture support for both i586
91 and qemux86 exist.
92 Packages for the i586 architecture are placed in
93 <code class="filename">build/tmp/deploy/ipk/i586</code>, while packages for
94 the qemux86 architecture are placed in
95 <code class="filename">build/tmp/deploy/ipk/qemux86</code>.
96 </p>
97</div></body>
98</html>
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