<!--
 Documentation/_templates/layout.html

 Licensed to the Apache Software Foundation (ASF) under one or more
 contributor license agreements.  See the NOTICE file distributed with
 this work for additional information regarding copyright ownership.  The
 ASF licenses this file to you under the Apache License, Version 2.0 (the
 "License"); you may not use this file except in compliance with the
 License.  You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 License for the specific language governing permissions and limitations
 under the License.
-->


<!DOCTYPE html>
<html class="writer-html5" lang="en" >
<head>
  <meta charset="utf-8">
  
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  
  <title>Compiling &mdash; NuttX latest documentation</title>
  

  <link rel="stylesheet" href="../_static/css/theme.css" type="text/css" />
  <link rel="stylesheet" href="../_static/pygments.css" type="text/css" />
  <link rel="stylesheet" href="../_static/sphinx_tabs/semantic-ui-2.4.1/segment.min.css" type="text/css" />
  <link rel="stylesheet" href="../_static/sphinx_tabs/semantic-ui-2.4.1/menu.min.css" type="text/css" />
  <link rel="stylesheet" href="../_static/sphinx_tabs/semantic-ui-2.4.1/tab.min.css" type="text/css" />
  <link rel="stylesheet" href="../_static/sphinx_tabs/tabs.css" type="text/css" />
  <link rel="stylesheet" href="../_static/custom.css" type="text/css" />

  
    <link rel="shortcut icon" href="../_static/favicon.ico"/>
  
  
  <!--[if lt IE 9]>
    <script src="../_static/js/html5shiv.min.js"></script>
  <![endif]-->
  
    
      <script type="text/javascript" id="documentation_options" data-url_root="../" src="../_static/documentation_options.js"></script>
        <script src="../_static/jquery.js"></script>
        <script src="../_static/underscore.js"></script>
        <script src="../_static/doctools.js"></script>
        <script src="../_static/language_data.js"></script>
    
    <script type="text/javascript" src="../_static/js/theme.js"></script>

    
    <link rel="index" title="Index" href="../genindex.html" />
    <link rel="search" title="Search" href="../search.html" />
    <link rel="next" title="Running" href="running.html" />
    <link rel="prev" title="Installing" href="install.html" /> 
</head>

<body class="wy-body-for-nav">

   
  <div class="wy-grid-for-nav">
    
    <nav data-toggle="wy-nav-shift" class="wy-nav-side">
      <div class="wy-side-scroll">
        <div class="wy-side-nav-search" >
          
  
    <a href="../index.html" class="icon icon-home"> NuttX
  

    <img src="../_static/NuttX.png" class="logo" alt="Logo"/>
  
  </a>
  
  <!-- this version selector is quite ugly, should be probably replaced by something
       more modern -->
       
  <div class="version-selector">
    <select>
    
      <option value="latest" selected="selected">latest</option>
    
    </select>
  </div>
  
  
<div role="search">
  <form id="rtd-search-form" class="wy-form" action="../search.html" method="get">
    <input type="text" name="q" placeholder="Search docs" />
    <input type="hidden" name="check_keywords" value="yes" />
    <input type="hidden" name="area" value="default" />
  </form>
</div>

        </div>

        
        <div class="wy-menu wy-menu-vertical" data-spy="affix" role="navigation" aria-label="main navigation">
          
            
              <p class="caption"><span class="caption-text">Table of Contents</span></p>
<ul class="current">
<li class="toctree-l1"><a class="reference internal" href="../index.html">Home</a></li>
<li class="toctree-l1"><a class="reference internal" href="../introduction/index.html">Introduction</a></li>
<li class="toctree-l1"><a class="reference internal" href="../introduction/inviolables.html">The Inviolable Principles of NuttX</a></li>
<li class="toctree-l1 current"><a class="reference internal" href="index.html">Getting Started</a><ul class="current">
<li class="toctree-l2"><a class="reference internal" href="quickstart.html">Quickstart</a></li>
<li class="toctree-l2"><a class="reference internal" href="install.html">Installing</a></li>
<li class="toctree-l2 current"><a class="current reference internal" href="#">Compiling</a><ul>
<li class="toctree-l3"><a class="reference internal" href="#initialize-configuration">Initialize Configuration</a></li>
<li class="toctree-l3"><a class="reference internal" href="#customize-your-configuration-optional">Customize Your Configuration (Optional)</a></li>
<li class="toctree-l3"><a class="reference internal" href="#build-nuttx">Build NuttX</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="running.html">Running</a></li>
<li class="toctree-l2"><a class="reference internal" href="configuring.html">Configuring</a></li>
<li class="toctree-l2"><a class="reference internal" href="debugging.html">Debugging</a></li>
<li class="toctree-l2"><a class="reference internal" href="organization.html">Directory Structure</a></li>
<li class="toctree-l2"><a class="reference internal" href="build_and_make.html">Build and Make Details</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="../components/index.html">OS Components</a></li>
<li class="toctree-l1"><a class="reference internal" href="../applications/index.html">Applications</a></li>
<li class="toctree-l1"><a class="reference internal" href="../boards/index.html">Supported Boards</a></li>
<li class="toctree-l1"><a class="reference internal" href="../reference/index.html">API Reference</a></li>
<li class="toctree-l1"><a class="reference internal" href="../guides/index.html">Guides</a></li>
<li class="toctree-l1"><a class="reference internal" href="../releases/index.html">Releases</a></li>
<li class="toctree-l1"><a class="reference internal" href="../contributing/index.html">Contributing</a></li>
<li class="toctree-l1"><a class="reference internal" href="../glossary.html">Glossary</a></li>
</ul>

            
        </div>
        
      </div>
    </nav>

    <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap">

      
      <nav class="wy-nav-top" aria-label="top navigation">
        
          <i data-toggle="wy-nav-top" class="fa fa-bars"></i>
          <a href="../index.html">NuttX</a>
        
      </nav>


      <div class="wy-nav-content">
        
        <div class="rst-content">
        
          
<div role="navigation" aria-label="breadcrumbs navigation">

  <ul class="wy-breadcrumbs">
    
      <li><a href="../index.html" class="icon icon-home"></a> &raquo;</li>
        
          <li><a href="index.html">Getting Started</a> &raquo;</li>
        
      <li>Compiling</li>
    
    
      <li class="wy-breadcrumbs-aside">
        
            
            <a href="../_sources/quickstart/compiling.rst.txt" rel="nofollow"> View page source</a>
          
        
      </li>
    
  </ul>

  
  <hr/>
</div>
          <div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
           <div itemprop="articleBody">
            
  <div class="section" id="compiling">
<span id="id1"></span><h1>Compiling<a class="headerlink" href="#compiling" title="Permalink to this headline">¶</a></h1>
<p>Now that we’ve installed Apache NuttX prerequisites and downloaded the source code,
we are ready to compile the source code into an executable binary file that can
be run on the embedded board.</p>
<div class="section" id="initialize-configuration">
<h2>Initialize Configuration<a class="headerlink" href="#initialize-configuration" title="Permalink to this headline">¶</a></h2>
<p>The first step is to initialize NuttX configuration for a given board, based from
a pre-existing configuration. To list all supported configurations you can do:</p>
<blockquote>
<div><div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$</span> <span class="nb">cd</span> nuttx
<span class="gp">$</span> ./tools/configure.sh -L <span class="p">|</span> less
</pre></div>
</div>
</div></blockquote>
<p>The output is in the format <code class="docutils literal notranslate"><span class="pre">&lt;board</span> <span class="pre">name&gt;:&lt;board</span> <span class="pre">configuration&gt;</span></code>. You will see that
generally all boards support the <code class="docutils literal notranslate"><span class="pre">nsh</span></code> configuration which is a good sarting point
since it enables booting into the interactive command line
<a class="reference internal" href="../components/nsh/index.html"><span class="doc">NuttShell (NSH)</span></a>.</p>
<p>To choose a configuration you pass the <code class="docutils literal notranslate"><span class="pre">&lt;board</span> <span class="pre">name&gt;:&lt;board</span> <span class="pre">configuration&gt;</span></code> option
to <code class="docutils literal notranslate"><span class="pre">configure.sh</span></code> and indicate your host platform, such as:</p>
<blockquote>
<div><div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$</span> <span class="nb">cd</span> nuttx
<span class="gp">$</span> ./tools/configure.sh -l stm32f4discovery:nsh
</pre></div>
</div>
</div></blockquote>
<p>The <code class="docutils literal notranslate"><span class="pre">-l</span></code> tells use that we’re on Linux (macOS and Windows builds are
possible). Use the <code class="docutils literal notranslate"><span class="pre">-h</span></code> argument to see all available options.</p>
</div>
<div class="section" id="customize-your-configuration-optional">
<h2>Customize Your Configuration (Optional)<a class="headerlink" href="#customize-your-configuration-optional" title="Permalink to this headline">¶</a></h2>
<p>This step is optional. Right now, this is mainly to get familiar with how it
works– you don’t need to change any of the options now, but knowing how
to do this will come in handy later.</p>
<p>There are a lot of options. We’ll cover a few of them here.
Don’t worry about the complexity– you don’t have to use most of the options.</p>
<div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$</span> <span class="nb">cd</span> nuttx/
<span class="gp">$</span> make menuconfig
</pre></div>
</div>
<div class="admonition-todo admonition" id="id2">
<p class="admonition-title">Todo</p>
<p>Explain some useful options.</p>
</div>
</div>
<div class="section" id="build-nuttx">
<h2>Build NuttX<a class="headerlink" href="#build-nuttx" title="Permalink to this headline">¶</a></h2>
<p>We can now build NuttX. To do so, you can simply run:</p>
<blockquote>
<div><div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$</span> <span class="nb">cd</span> nuttx/
<span class="gp">$</span> make make
</pre></div>
</div>
</div></blockquote>
<p>The build will complete by generating the binary outputs
inside <cite>nuttx</cite> directory. Typically this includes the <cite>nuttx</cite>
ELF file (suitable for debugging using <cite>gdb</cite>) and a <cite>nuttx.bin</cite>
file that can be flashed to the board.</p>
<p>To clean the build, you can do:</p>
<blockquote>
<div><div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$</span> make clean
</pre></div>
</div>
</div></blockquote>
<div class="admonition warning">
<p class="admonition-title">Warning</p>
<p>At the moment it is recommended that after modifying the
configuration you first clean before building again. This
is currently worked on.</p>
</div>
<hr class="docutils" />
<p>Next up is <a class="reference internal" href="running.html#running"><span class="std std-ref">Running</span></a>.</p>
</div>
</div>


           </div>
           
          </div>
          <footer>
  

  <hr/>

  <div role="contentinfo">
    <p>
        
        &copy; Copyright 2020, The Apache Software Foundation

    </p>
  </div> 

</footer>

        </div>
      </div>

    </section>

  </div>
  

  <script type="text/javascript">
      jQuery(function () {
          SphinxRtdTheme.Navigation.enable(true);
      });
  </script>

  
</body>
</html>