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Building and Installing Log4j - Apache Log4j 2</title>
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<div class="section"><h2>Building and Installing Log4j<a name="Building_and_Installing_Log4j"></a></h2>
<p>
<i>The information below is for developers who want to modify Log4j or
contribute to Log4j. If your goal is to add logging to your application
you don't need to build from the source code,
you can <a href="download.html">download</a> the pre-built binaries instead.
</i>
</p>
<p>
Log4j 2.x is hosted in the Apache Software Foundation's subversion repository. Details on obtaining the
most current source code can be found at
<a href="./source-repository.html">Log4j Source Repository</a>. The source from the latest release may be
obtained by downloading it using the instructions at <a href="./download.html">Log4j Downloads</a>.
</p>
<p>
Log4j 2.x uses Maven 3 as its build tool. To build and install Log4j in your local Maven cache, from
the root directory run: <kbd>mvn install</kbd>
</p>
<p class="bg-warning">Note that in order to build the website, you need to use
<a class="externalLink" href="http://maven.apache.org/download.cgi#Maven_3.0.5">Maven 3.0.5</a> due to plugin compatibility
issues as documented in
<a class="externalLink" href="http://jira.codehaus.org/browse/MSITE-695">MSITE-695</a>.
</p>
<p>
Then to build the full site, you must use a local staging directory:
</p>
<div><pre>mvn site
[Windows] mvn site:stage-deploy -DstagingSiteURL=file:///%HOME%/log4j
[Unix] mvn site:stage-deploy -DstagingSiteURL=file:///$HOME/log4j</pre></div>
<p>
To rebuild only what's changed and execute the tests, run: <kbd>mvn test</kbd>
</p>
<p>
To rebuild from scratch, add &quot;clean&quot;, for example: <kbd>mvn clean test</kbd>
</p>
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