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class="navItem" href="/docs/next/compiling-osx">Compiling on OS X</a></li><li class="navListItem"><a class="navItem" href="/docs/next/compiling-docker">Compiling With Docker</a></li><li class="navListItem"><a class="navItem" href="/docs/next/compiling-running-tests">Running Tests</a></li><li class="navListItem"><a class="navItem" href="/docs/next/compiling-code-organization">Code Organization</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Extending Heron</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/next/extending-heron-scheduler">Custom Scheduler</a></li><li class="navListItem"><a class="navItem" href="/docs/next/extending-heron-metric-sink">Custom Metrics Sink</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Heron Resources</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/next/heron-resources-resources">Heron Resources</a></li></ul></div></div></section></div><script>
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<p>Heron is currently available for <a href="compiling-osx">Mac OS X 12</a>,
<a href="compiling-linux">Ubuntu 20.04</a>, and <a href="compiling-docker#building-heron">debian11</a>.
This guide describes the basics of the
Heron build system. For step-by-step build instructions for other platforms,
the following guides are available:</p>
<ul>
<li><a href="compiling-linux">Building on Linux Platforms</a></li>
<li><a href="compiling-osx">Building on Mac OS X</a></li>
</ul>
<p>Heron can be built either <a href="#building-all-components">in its entirety</a>, as <a href="#building-specific-components">individual components</a>.</p>
<p>Instructions on running unit tests for Heron can also be found in <a href="compiling-running-tests">Testing Heron</a>.</p>
<h2><a class="anchor" aria-hidden="true" id="requirements"></a><a href="#requirements" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Requirements</h2>
<p>You must have the following installed to compile Heron:</p>
<ul>
<li><a href="http://bazel.io/docs/install.html">Bazel</a> = 4.2.2. Later
versions might work but have not been tested. See <a href="#installing-bazel">Installing Bazel</a>below.</li>
<li><a href="https://www.oracle.com/java/technologies/javase-jdk11-downloads.html">Java 11</a>
is required by Bazel and Heron;
topologies can be written in Java 7 or above
, but Heron jars are required to run with a Java 11 JRE.</li>
<li><a href="http://www.gnu.org/software/autoconf/autoconf.html">Autoconf</a> &gt;=
2.6.3</li>
<li><a href="https://www.gnu.org/software/automake/">Automake</a> &gt;= 1.11.1</li>
<li><a href="https://www.gnu.org/software/make/">GNU Make</a> &gt;= 3.81</li>
<li><a href="http://www.gnu.org/software/libtool/">GNU Libtool</a> &gt;= 2.4.6</li>
<li><a href="https://gcc.gnu.org/">gcc/g++</a> &gt;= 4.8.1 (Linux platforms)</li>
<li><a href="https://cmake.org/">CMake</a> &gt;= 2.6.4</li>
<li><a href="https://www.python.org/">Python</a> &gt;= 3.8</li>
<li><a href="https://www.perl.org/">Perl</a> &gt;= 5.8.8</li>
<li>[Ant] (<a href="https://ant.apache.org/">https://ant.apache.org/</a>) &gt;= 1.10.0</li>
<li>[Pkg-Config] (<a href="https://www.freedesktop.org/wiki/Software/pkg-config/">https://www.freedesktop.org/wiki/Software/pkg-config/</a>) &gt;= 0.29.2</li>
</ul>
<p>Export the <code>CC</code> and <code>CXX</code> environment variables with a path specific to your
machine:</p>
<pre><code class="hljs css language-bash">$ <span class="hljs-built_in">export</span> CC=/your-path-to/bin/c_compiler
$ <span class="hljs-built_in">export</span> CXX=/your-path-to/bin/c++_compiler
$ <span class="hljs-built_in">echo</span> <span class="hljs-variable">$CC</span> <span class="hljs-variable">$CXX</span>
</code></pre>
<h2><a class="anchor" aria-hidden="true" id="installing-bazel"></a><a href="#installing-bazel" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Installing Bazel</h2>
<p>Heron uses the <a href="http://bazel.io">Bazel</a> build tool. Bazel releases can be found here:
<a href="https://github.com/bazelbuild/bazel/releases/tag/">https://github.com/bazelbuild/bazel/releases/tag/</a>4.2.2
and installation instructions can be found <a href="http://bazel.io/docs/install.html">here</a>.</p>
<p>To ensure that Bazel has been installed, run <code>bazel version</code> and check the
version (listed next to <code>Build label</code> in the script's output) to ensure that you
have Bazel 4.2.2.</p>
<h2><a class="anchor" aria-hidden="true" id="configuring-bazel"></a><a href="#configuring-bazel" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Configuring Bazel</h2>
<p>There is a Python script that you can run to configure Bazel on supported
platforms:</p>
<pre><code class="hljs css language-bash">$ <span class="hljs-built_in">cd</span> /path/to/heron
$ ./bazel_configure.py
</code></pre>
<h2><a class="anchor" aria-hidden="true" id="building"></a><a href="#building" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Building</h2>
<pre><code class="hljs css language-bash">$ bazel build heron/...
</code></pre>
<p>This will build in the Bazel default <code>fastbuild</code> mode. Production release packages include additional performance optimizations not enabled by default. To enable production optimizations, include the <code>opt</code> flag. This defaults to optimization level <code>-O2</code>. The second option overrides the setting to bump it to <code>-CO3</code>.</p>
<pre><code class="hljs css language-bash">$ bazel build -c opt heron/...
</code></pre>
<pre><code class="hljs css language-bash">$ bazel build -c opt --copt=-O3 heron/...
</code></pre>
<p>If you wish to add the code syntax style check, add <code>--config=stylecheck</code>.</p>
<h3><a class="anchor" aria-hidden="true" id="building-all-components"></a><a href="#building-all-components" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Building All Components</h3>
<p>The Bazel build process can produce either executable install scripts or
bundled tars. To build executables or tars for all Heron components at once,
use the following <code>bazel build</code> commands, respectively:</p>
<pre><code class="hljs css language-bash">$ bazel build scripts/packages:binpkgs
$ bazel build scripts/packages:tarpkgs
</code></pre>
<p>Resulting artifacts can be found in subdirectories below the <code>bazel-bin</code>
directory. The <code>heron-tracker</code> executable, for example, can be found at
<code>bazel-bin/heron/tools/tracker/src/python/heron-tracker</code>.</p>
<h3><a class="anchor" aria-hidden="true" id="building-specific-components"></a><a href="#building-specific-components" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Building Specific Components</h3>
<p>As an alternative to building a full release, you can build Heron executables
for a single Heron component (such as the <a href="user-manuals-heron-tracker-runbook">Heron
Tracker</a>) by passing a target to the <code>bazel build</code> command. For example, the following command would build the Heron Tracker:</p>
<pre><code class="hljs css language-bash">$ bazel build heron/tools/tracker/src/python:heron-tracker
</code></pre>
<h2><a class="anchor" aria-hidden="true" id="testing-heron"></a><a href="#testing-heron" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Testing Heron</h2>
<p>Instructions for running Heron unit tests can be found at <a href="compiling-running-tests">Testing
Heron</a>.</p>
</span></div></article></div><div class="docs-prevnext"><a class="docs-prev button" href="/docs/next/user-manuals-heron-shell"><span class="arrow-prev">← </span><span>Heron Shell</span></a><a class="docs-next button" href="/docs/next/compiling-linux"><span>Compiling on Linux</span><span class="arrow-next"> →</span></a></div></div></div><nav class="onPageNav"><ul class="toc-headings"><li><a href="#requirements">Requirements</a></li><li><a href="#installing-bazel">Installing Bazel</a></li><li><a href="#configuring-bazel">Configuring Bazel</a></li><li><a href="#building">Building</a><ul class="toc-headings"><li><a href="#building-all-components">Building All Components</a></li><li><a href="#building-specific-components">Building Specific Components</a></li></ul></li><li><a href="#testing-heron">Testing Heron</a></li></ul></nav></div><footer class="nav-footer" id="footer"><div class="apache-disclaimer">Apache Heron is an effort undergoing incubation at <a target="_blank" href="https://apache.org/">The Apache Software Foundation (ASF)</a> sponsored by the Apache Incubator PMC. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.<br/><br/>Apache®, the names of Apache projects, and the feather logo are either <a rel="external" href="https://www.apache.org/foundation/marks/list/">registered trademarks or trademarks</a> of the Apache Software Foundation in the United States and/or other countries.<br/><br/><div class="copyright-box">Copyright © 2023 the Apache Software Foundation, Apache Heron, Heron, 
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