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<li class="toctree-l1"><a class="reference internal" href="../introduction/index.html">Introduction</a></li>
<li class="toctree-l1 current"><a class="reference internal" href="index.html">Getting Started</a><ul class="current">
<li class="toctree-l2 current"><a class="current reference internal" href="#">Installing</a><ul>
<li class="toctree-l3"><a class="reference internal" href="#prerequisites">Prerequisites</a><ul>
<li class="toctree-l4"><a class="reference internal" href="#kconfig-frontend">KConfig frontend</a></li>
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  <section id="installing">
<span id="install"></span><h1>Installing<a class="headerlink" href="#installing" title="Permalink to this heading"></a></h1>
<p>The first step to get started with NuttX is to install a series of required tools, a toolchain for the architecture
you will be working with and, finally, download NuttX source code itself.</p>
<section id="prerequisites">
<h2>Prerequisites<a class="headerlink" href="#prerequisites" title="Permalink to this heading"></a></h2>
<p>First, install the following set of system dependencies according to your Operating System:</p>
<div class="sphinx-tabs docutils container">
<div aria-label="Tabbed content" class="closeable" role="tablist"><button aria-controls="panel-0-0-0" aria-selected="true" class="sphinx-tabs-tab" id="tab-0-0-0" name="0-0" role="tab" tabindex="0">Linux (debian based)</button><button aria-controls="panel-0-0-1" aria-selected="false" class="sphinx-tabs-tab" id="tab-0-0-1" name="0-1" role="tab" tabindex="-1">macOS</button><button aria-controls="panel-0-0-2" aria-selected="false" class="sphinx-tabs-tab" id="tab-0-0-2" name="0-2" role="tab" tabindex="-1">Windows / WSL</button><button aria-controls="panel-0-0-3" aria-selected="false" class="sphinx-tabs-tab" id="tab-0-0-3" name="0-3" role="tab" tabindex="-1">Windows/Cygwin</button></div><div aria-labelledby="tab-0-0-0" class="sphinx-tabs-panel" id="panel-0-0-0" name="0-0" role="tabpanel" tabindex="0"><p>Run the following command to install packages:</p>
<div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>sudo<span class="w"> </span>apt<span class="w"> </span>install<span class="w"> </span><span class="se">\</span>
bison<span class="w"> </span>flex<span class="w"> </span>gettext<span class="w"> </span>texinfo<span class="w"> </span>libncurses5-dev<span class="w"> </span>libncursesw5-dev<span class="w"> </span><span class="se">\</span>
gperf<span class="w"> </span>automake<span class="w"> </span>libtool<span class="w"> </span>pkg-config<span class="w"> </span>build-essential<span class="w"> </span>gperf<span class="w"> </span>genromfs<span class="w"> </span><span class="se">\</span>
libgmp-dev<span class="w"> </span>libmpc-dev<span class="w"> </span>libmpfr-dev<span class="w"> </span>libisl-dev<span class="w"> </span>binutils-dev<span class="w"> </span>libelf-dev<span class="w"> </span><span class="se">\</span>
libexpat-dev<span class="w"> </span>gcc-multilib<span class="w"> </span>g++-multilib<span class="w"> </span>picocom<span class="w"> </span>u-boot-tools<span class="w"> </span>util-linux
</pre></div>
</div>
</div><div aria-labelledby="tab-0-0-1" class="sphinx-tabs-panel" hidden="true" id="panel-0-0-1" name="0-1" role="tabpanel" tabindex="0"><p>Run the following command to install packages:</p>
<div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>brew<span class="w"> </span>install<span class="w"> </span>x86_64-elf-gcc<span class="w">  </span><span class="c1"># Used by simulator</span>
<span class="gp">$ </span>brew<span class="w"> </span>install<span class="w"> </span>u-boot-tools<span class="w">  </span><span class="c1"># Some platform integrate with u-boot</span>
</pre></div>
</div>
</div><div aria-labelledby="tab-0-0-2" class="sphinx-tabs-panel" hidden="true" id="panel-0-0-2" name="0-2" role="tabpanel" tabindex="0"><p>If you are are building Apache NuttX on Windows and using WSL follow
that installation guide for Linux.  This has been verified against the
Ubuntu 18.04 version.</p>
<p>There may be complications interacting with
programming tools over USB.  Recently support for USBIP was added to WSL 2
which has been used with the STM32 platform, but it is not trivial to configure:
<a class="reference external" href="https://github.com/rpasek/usbip-wsl2-instructions">https://github.com/rpasek/usbip-wsl2-instructions</a></p>
</div><div aria-labelledby="tab-0-0-3" class="sphinx-tabs-panel" hidden="true" id="panel-0-0-3" name="0-3" role="tabpanel" tabindex="0"><p>Download and install <a class="reference external" href="https://www.cygwin.com/">Cygwin</a> using the minimal
installation in addition to these packages:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>make              bison             libmpc-devel
gcc-core          byacc             automake-1.15
gcc-g++           gperf             libncurses-devel
flex              gdb               libmpfr-devel
git               unzip             zlib-devel
</pre></div>
</div>
</div></div>
<section id="kconfig-frontend">
<h3>KConfig frontend<a class="headerlink" href="#kconfig-frontend" title="Permalink to this heading"></a></h3>
<p>NuttX configuration system uses <a class="reference external" href="https://www.kernel.org/doc/Documentation/kbuild/kconfig-language.txt">KConfig</a> which is exposed via a series of interactive menu-based <em>frontends</em>, part of the <code class="docutils literal notranslate"><span class="pre">kconfig-frontends</span></code> package. Depending on your OS you may use a precompiled package or you will have to build it from source, which is available in the <a class="reference external" href="https://bitbucket.org/nuttx/tools/src/master/kconfig-frontends/">NuttX tools repository</a>:</p>
<blockquote>
<div><div class="sphinx-tabs docutils container">
<div aria-label="Tabbed content" class="closeable" role="tablist"><button aria-controls="panel-1-VWJ1bnR1IDIwLjA0IExUUyBhbmQgbGF0ZXI=" aria-selected="true" class="sphinx-tabs-tab code-tab group-tab" id="tab-1-VWJ1bnR1IDIwLjA0IExUUyBhbmQgbGF0ZXI=" name="VWJ1bnR1IDIwLjA0IExUUyBhbmQgbGF0ZXI=" role="tab" tabindex="0">Ubuntu 20.04 LTS and later</button><button aria-controls="panel-1-TWFjT1MsIFVidW50dSAxOC4wNCBMVFMgYW5kIGVhcmxpZXI=" aria-selected="false" class="sphinx-tabs-tab code-tab group-tab" id="tab-1-TWFjT1MsIFVidW50dSAxOC4wNCBMVFMgYW5kIGVhcmxpZXI=" name="TWFjT1MsIFVidW50dSAxOC4wNCBMVFMgYW5kIGVhcmxpZXI=" role="tab" tabindex="-1">MacOS, Ubuntu 18.04 LTS and earlier</button></div><div aria-labelledby="tab-1-VWJ1bnR1IDIwLjA0IExUUyBhbmQgbGF0ZXI=" class="sphinx-tabs-panel code-tab group-tab" id="panel-1-VWJ1bnR1IDIwLjA0IExUUyBhbmQgbGF0ZXI=" name="VWJ1bnR1IDIwLjA0IExUUyBhbmQgbGF0ZXI=" role="tabpanel" tabindex="0"><div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>apt<span class="w"> </span>install<span class="w"> </span>kconfig-frontends
</pre></div>
</div>
</div><div aria-labelledby="tab-1-TWFjT1MsIFVidW50dSAxOC4wNCBMVFMgYW5kIGVhcmxpZXI=" class="sphinx-tabs-panel code-tab group-tab" hidden="true" id="panel-1-TWFjT1MsIFVidW50dSAxOC4wNCBMVFMgYW5kIGVhcmxpZXI=" name="TWFjT1MsIFVidW50dSAxOC4wNCBMVFMgYW5kIGVhcmxpZXI=" role="tabpanel" tabindex="0"><div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>git<span class="w"> </span>clone<span class="w"> </span>https://bitbucket.org/nuttx/tools.git
<span class="gp">$ </span><span class="nb">cd</span><span class="w"> </span>tools/kconfig-frontends
<span class="gp">$ </span><span class="c1"># on MacOS do the following:</span>
<span class="gp">$ </span>patch<span class="w"> </span>&lt;<span class="w"> </span>../kconfig-macos.diff<span class="w"> </span>-p<span class="w"> </span><span class="m">1</span>
<span class="gp">$ </span>./configure<span class="w"> </span>--enable-mconf<span class="w"> </span>--disable-shared<span class="w"> </span>--enable-static<span class="w"> </span>--disable-gconf<span class="w"> </span>--disable-qconf<span class="w"> </span>--disable-nconf
<span class="gp">$ </span><span class="c1"># on Linux do the following:</span>
<span class="gp">$ </span>./configure<span class="w"> </span>--enable-mconf<span class="w"> </span>--disable-nconf<span class="w"> </span>--disable-gconf<span class="w"> </span>--disable-qconf
<span class="gp">$ </span>make
<span class="gp">$ </span>make<span class="w"> </span>install
</pre></div>
</div>
</div></div>
</div></blockquote>
</section>
</section>
<section id="toolchain">
<h2>Toolchain<a class="headerlink" href="#toolchain" title="Permalink to this heading"></a></h2>
<p>To build Apache NuttX you need the appropriate toolchain
according to your target platform. Some Operating Systems
such as Linux distribute toolchains for various architectures.
This is usually an easy choice however you should be aware
that in some cases the version offered by your OS may have
problems and it may better to use a widely used build from
another source.</p>
<p>The following example shows how to install a toolchain for
ARM architecture:</p>
<div class="sphinx-tabs docutils container">
<div aria-label="Tabbed content" class="closeable" role="tablist"><button aria-controls="panel-2-VWJ1bnR1IChkZWIp" aria-selected="true" class="sphinx-tabs-tab code-tab group-tab" id="tab-2-VWJ1bnR1IChkZWIp" name="VWJ1bnR1IChkZWIp" role="tab" tabindex="0">Ubuntu (deb)</button><button aria-controls="panel-2-2-0" aria-selected="false" class="sphinx-tabs-tab" id="tab-2-2-0" name="2-0" role="tab" tabindex="-1">From arm.com</button></div><div aria-labelledby="tab-2-VWJ1bnR1IChkZWIp" class="sphinx-tabs-panel code-tab group-tab" id="panel-2-VWJ1bnR1IChkZWIp" name="VWJ1bnR1IChkZWIp" role="tabpanel" tabindex="0"><div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>apt<span class="w"> </span>install<span class="w"> </span>gcc-arm-none-eabi<span class="w"> </span>binutils-arm-none-eabi
</pre></div>
</div>
</div><div aria-labelledby="tab-2-2-0" class="sphinx-tabs-panel" hidden="true" id="panel-2-2-0" name="2-0" role="tabpanel" tabindex="0"><p>First, create a directory to hold the toolchain:</p>
<div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>usermod<span class="w"> </span>-a<span class="w"> </span>-G<span class="w"> </span>users<span class="w"> </span><span class="nv">$USER</span>
<span class="gp">$ </span><span class="c1"># get a login shell that knows we&#39;re in this group:</span>
<span class="gp">$ </span>su<span class="w"> </span>-<span class="w"> </span><span class="nv">$USER</span>
<span class="gp">$ </span>sudo<span class="w"> </span>mkdir<span class="w"> </span>/opt/gcc
<span class="gp">$ </span>sudo<span class="w"> </span>chgrp<span class="w"> </span>-R<span class="w"> </span>users<span class="w"> </span>/opt/gcc
<span class="gp">$ </span>sudo<span class="w"> </span>chmod<span class="w"> </span>-R<span class="w"> </span>u+rw<span class="w"> </span>/opt/gcc
<span class="gp">$ </span><span class="nb">cd</span><span class="w"> </span>/opt/gcc
</pre></div>
</div>
<p>Download and extract toolchain:</p>
<div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span><span class="nv">HOST_PLATFORM</span><span class="o">=</span>x86_64-linux<span class="w">   </span><span class="c1"># use &quot;mac&quot; for macOS.</span>
<span class="gp">$ </span><span class="c1"># For Windows there is a zip instead (gcc-arm-none-eabi-9-2019-q4-major-win32.zip)</span>
<span class="gp">$ </span>curl<span class="w"> </span>-L<span class="w"> </span>-O<span class="w"> </span>https://developer.arm.com/-/media/Files/downloads/gnu-rm/9-2019q4/gcc-arm-none-eabi-9-2019-q4-major-<span class="si">${</span><span class="nv">HOST_PLATFORM</span><span class="si">}</span>.tar.bz2
<span class="gp">$ </span>tar<span class="w"> </span>xf<span class="w"> </span>gcc-arm-none-eabi-9-2019-q4-major-<span class="si">${</span><span class="nv">HOST_PLATFORM</span><span class="si">}</span>.tar.bz2
</pre></div>
</div>
<p>Add the toolchain to your <cite>PATH</cite>:</p>
<div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span><span class="nb">echo</span><span class="w"> </span><span class="s2">&quot;export PATH=/opt/gcc/gcc-arm-none-eabi-9-2019-q4-major/bin:</span><span class="nv">$PATH</span><span class="s2">&quot;</span><span class="w"> </span>&gt;&gt;<span class="w"> </span>~/.bashrc
</pre></div>
</div>
<p>You can edit your shell’s rc files if you don’t use bash.</p>
</div></div>
<div class="admonition tip">
<p class="admonition-title">Tip</p>
<p>There are hints on how to get the latest tool chains for most supported
architectures in the Apache NuttX CI helper
<a class="reference external" href="https://github.com/apache/nuttx/tree/master/tools/ci/cibuild.sh">script</a>
and Docker <a class="reference external" href="https://github.com/apache/nuttx/tree/master/tools/ci/docker/linux/Dockerfile">container</a></p>
</div>
<div class="admonition-todo admonition" id="id1">
<p class="admonition-title">Todo</p>
<p>Required toolchain should be part of each arch documentation (see <a class="reference external" href="https://github.com/apache/nuttx/issues/2409">relevant issue</a>).</p>
</div>
</section>
<section id="download-nuttx">
<h2>Download NuttX<a class="headerlink" href="#download-nuttx" title="Permalink to this heading"></a></h2>
<p>Apache NuttX is actively developed on GitHub. There are two main repositories, <a class="reference external" href="https://github.com/apache/nuttx">nuttx</a> and <a class="reference external" href="https://github.com/apache/nuttx-apps">apps</a>, where the latter is technically optional (but recommended for complete set of features). If you intend to contribute changes, you need the absolute latest version or you simply prefer to work using git, you should clone these repositories (recommended). Otherwise you can choose to download any <a class="reference external" href="https://nuttx.apache.org/download/">stable release</a> archive.</p>
<div class="sphinx-tabs docutils container">
<div aria-label="Tabbed content" class="closeable" role="tablist"><button aria-controls="panel-3-3-0" aria-selected="true" class="sphinx-tabs-tab" id="tab-3-3-0" name="3-0" role="tab" tabindex="0">Clone git repositories</button><button aria-controls="panel-3-3-1" aria-selected="false" class="sphinx-tabs-tab" id="tab-3-3-1" name="3-1" role="tab" tabindex="-1">Download stable release</button></div><div aria-labelledby="tab-3-3-0" class="sphinx-tabs-panel" id="panel-3-3-0" name="3-0" role="tabpanel" tabindex="0"><div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>mkdir<span class="w"> </span>nuttxspace
<span class="gp">$ </span><span class="nb">cd</span><span class="w"> </span>nuttxspace
<span class="gp">$ </span>git<span class="w"> </span>clone<span class="w"> </span>https://github.com/apache/nuttx.git<span class="w"> </span>nuttx
<span class="gp">$ </span>git<span class="w"> </span>clone<span class="w"> </span>https://github.com/apache/nuttx-apps<span class="w"> </span>apps
</pre></div>
</div>
<p>The development source code is also available as a compressed archive, should you need it:</p>
<div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>mkdir<span class="w"> </span>nuttxspace
<span class="gp">$ </span><span class="nb">cd</span><span class="w"> </span>nuttxspace
<span class="gp">$ </span>curl<span class="w"> </span>-L<span class="w"> </span>https://github.com/apache/nuttx/tarball/master<span class="w"> </span>-o<span class="w"> </span>nuttx.tar.gz
<span class="gp">$ </span>curl<span class="w"> </span>-L<span class="w"> </span>https://github.com/apache/nuttx-apps/tarball/master<span class="w"> </span>-o<span class="w"> </span>apps.tar.gz
<span class="gp">$ </span>tar<span class="w"> </span>zxf<span class="w"> </span>nuttx.tar.gz<span class="w"> </span>--one-top-level<span class="o">=</span>nuttx<span class="w"> </span>--strip-components<span class="w"> </span><span class="m">1</span>
<span class="gp">$ </span>tar<span class="w"> </span>zxf<span class="w"> </span>apps.tar.gz<span class="w"> </span>--one-top-level<span class="o">=</span>apps<span class="w"> </span>--strip-components<span class="w"> </span><span class="m">1</span>
</pre></div>
</div>
<p>There are also <code class="docutils literal notranslate"><span class="pre">.zip</span></code> archives available (useful for Windows users): just replace <code class="docutils literal notranslate"><span class="pre">tarball</span></code> with
<code class="docutils literal notranslate"><span class="pre">zipball</span></code>.</p>
</div><div aria-labelledby="tab-3-3-1" class="sphinx-tabs-panel" hidden="true" id="panel-3-3-1" name="3-1" role="tabpanel" tabindex="0"><p>Go to <a class="reference external" href="https://nuttx.apache.org/download/">releases</a> and choose a version to download. The following
example uses version 10.1.0:</p>
<div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>mkdir<span class="w"> </span>nuttxspace
<span class="gp">$ </span><span class="nb">cd</span><span class="w"> </span>nuttxspace
<span class="gp">$ </span>curl<span class="w"> </span>-L<span class="w"> </span>https://www.apache.org/dyn/closer.lua/nuttx/12.0.0/apache-nuttx-12.0.0.tar.gz?action<span class="o">=</span>download<span class="w"> </span>-o<span class="w"> </span>nuttx.tar.gz
<span class="gp">$ </span>curl<span class="w"> </span>-L<span class="w"> </span>https://www.apache.org/dyn/closer.lua/nuttx/12.0.0/apache-nuttx-apps-12.0.0.tar.gz?action<span class="o">=</span>download<span class="w"> </span>-o<span class="w"> </span>apps.tar.gz
<span class="gp">$ </span>tar<span class="w"> </span>zxf<span class="w"> </span>nuttx.tar.gz
<span class="gp">$ </span>tar<span class="w"> </span>zxf<span class="w"> </span>apps.tar.gz
</pre></div>
</div>
</div></div>
</section>
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