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authorTimo Mueller <timo.mueller@bmw-carit.de>2013-02-08 09:16:33 -0600
committerRichard Purdie <richard.purdie@linuxfoundation.org>2013-02-14 17:25:35 +0000
commita41a805500cab281fba15bd8e5d3e60b88d0d4be (patch)
tree9973678912b57cfdef5b1f9676794a556b4d8966 /documentation/ref-manual/eclipse/html/poky-ref-manual/ref-classes-update-alternatives.html
parent768152340898cbb9faed6e8865a4e35c69833230 (diff)
downloadpoky-a41a805500cab281fba15bd8e5d3e60b88d0d4be.tar.gz
documentation: Part 1 of 2 updates to integrating docs to Eclipse help.
Hi, the generation of eclipse help files has been merged from the timo branch to the master. Since the creation of the timo branch there have been some changes to the master branch (e.g. new documentation, renamed documentation). This patch set does some cleanup for the renamed documentation and adds eclipse help generation support to the new documentation. 01: Removes the 'the' from the document titles 02..04: Cleanup obsolete artifacts resulting from the merge 05..08: Add eclipse help generation for ref-manual 09..13: Add eclipse help generation for kernel-dev 14..18: Add eclipse help generation for profile-manual Best regards, Timo This patch set originally contained 18 patches. I (Scott Rifenbark) had to push these changes as two parts. This is the first part. It does not include creation of the three cusomization files. (From yocto-docs rev: 9b1889f6e31ee70dae704fa08763fb9196616dad) Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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1<html>
2<head>
3<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
4<title>7.3. Alternatives - update-alternatives.bbclass</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="The Yocto Project Reference Manual">
8<link rel="up" href="ref-classes.html" title="Chapter 7. Classes">
9<link rel="prev" href="ref-classes-autotools.html" title="7.2. Autotooled Packages - autotools.bbclass">
10<link rel="next" href="ref-classes-update-rc.d.html" title="7.4. Initscripts - update-rc.d.bbclass">
11</head>
12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="section" title="7.3. Alternatives - update-alternatives.bbclass">
13<div class="titlepage"><div><div><h2 class="title" style="clear: both">
14<a name="ref-classes-update-alternatives"></a>7.3. Alternatives - <code class="filename">update-alternatives.bbclass</code>
15</h2></div></div></div>
16<p>
17 Several programs can fulfill the same or similar function and be installed with the same name.
18 For example, the <code class="filename">ar</code> command is available from the
19 <code class="filename">busybox</code>, <code class="filename">binutils</code> and
20 <code class="filename">elfutils</code> packages.
21 The <code class="filename">update-alternatives.bbclass</code> class handles renaming the
22 binaries so that multiple packages can be installed without conflicts.
23 The <code class="filename">ar</code> command still works regardless of which packages are installed
24 or subsequently removed.
25 The class renames the conflicting binary in each package and symlinks the highest
26 priority binary during installation or removal of packages.
27 </p>
28<p>
29 Four variables control this class:
30 </p>
31<div class="itemizedlist"><ul class="itemizedlist" type="disc">
32<li class="listitem"><p><code class="filename">ALTERNATIVE_NAME</code> &#8208; The name of the
33 binary that is replaced (<code class="filename">ar</code> in this example).</p></li>
34<li class="listitem"><p><code class="filename">ALTERNATIVE_LINK</code> &#8208; The path to
35 the resulting binary (<code class="filename">/bin/ar</code> in this example).</p></li>
36<li class="listitem"><p><code class="filename">ALTERNATIVE_PATH</code> &#8208; The path to the
37 real binary (<code class="filename">/usr/bin/ar.binutils</code> in this example).</p></li>
38<li class="listitem"><p><code class="filename">ALTERNATIVE_PRIORITY</code> &#8208; The priority of
39 the binary.
40 The version with the most features should have the highest priority.</p></li>
41</ul></div>
42<p>
43 </p>
44<p>
45 Currently, the OpenEmbedded build system supports only one binary per package.
46 </p>
47</div></body>
48</html>