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Getting-meson.html
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<h1 id="getting-meson">Getting Meson</h1>
<p>Meson is implemented in Python 3, and requires 3.7 or newer. If your
operating system provides a package manager, you should install it
with that. For platforms that don't have a package manager, you need
to download it from <a href="https://www.python.org/downloads/">Python's home page</a>. See below for
<a href="Getting-meson.html#platformspecific-install-quirks">platform-specific Python3 quirks</a>.</p>
<h2 id="downloading-meson">Downloading Meson</h2>
<p>Meson releases can be downloaded from the <a href="https://github.com/mesonbuild/meson/releases">GitHub release page</a>, and
you can run <code>./meson.py</code> from inside a release or the git repository
itself without doing anything special.</p>
<p>On Windows, if you did not install Python with the installer options
that make Python scripts executable, you will have to run <code>python /path/to/meson.py</code>, where <code>python</code> is Python 3.7 or newer.</p>
<p>The newest development code can be obtained directly from <a href="https://github.com/mesonbuild/meson">Git</a>, and
we strive to ensure that it will always be working and usable. All
commits go through a pull-request process that runs CI and tests
several platforms.</p>
<h3 id="packing-meson-into-a-zipapp">Packing Meson into a zipapp</h3>
<p>After downloading the release, you can create a standalone single-file
executable for Meson by running the script:</p>
<pre><code>./packaging/create_zipapp.py --outfile meson.pyz --interpreter '/usr/bin/env python3' <source checkout>
</code></pre>
<p>This uses python's native support for <a href="https://docs.python.org/3/library/zipapp.html">zipapp</a>.</p>
<h2 id="installing-meson-with-pip">Installing Meson with pip</h2>
<p>Meson is available in the <a href="https://pypi.python.org/pypi/meson/">Python Package Index</a> and can be installed
with <code>pip3 install --user meson</code>. This does not require any special
privileges. This will install the package in <code>~/.local/</code>, so you will
have to add <code>~/.local/bin</code> to your <code>PATH</code>. If you are using Meson only
for local development this should be all you need.</p>
<p>If you need to install your project in system directories, this
approach will not work as executable installed in this way are not
available when <code>sudo</code> is used. You can install Meson so it can be used
by every user with <code>sudo pip3 install meson</code>. It is generally not
recommended to do this, but instead use the version provided by distro
packages.</p>
<p>If you must install Meson with <code>sudo pip3</code> make sure to uninstall any
distro version first. Having multiple versions of any program in
system directories can lead to problems.</p>
<h2 id="installing-meson-and-ninja-with-the-msi-installer">Installing Meson and Ninja with the MSI installer</h2>
<p>We provide an MSI installer on the <a href="https://github.com/mesonbuild/meson/releases">GitHub release page</a> that can be
used to install both Meson and Ninja at once for Windows. It also
contains an embedded copy of Python, so scripts that use the <a href="Python-module.html">Python
module</a> and do not have any external dependencies
will continue to work as expected.</p>
<p>Please note that this is a new feature, so bug reports are expected
and welcome!</p>
<h2 id="dependencies">Dependencies</h2>
<p>In the most common case, you will need the <a href="https://ninja-build.org/">Ninja executable</a> for
using the <code>ninja</code> backend, which is the default in Meson. This backend
can be used on all platforms and with all toolchains, including GCC,
Clang, Visual Studio, MinGW, ICC, ARMCC, etc.</p>
<p>You can use the version provided by your package manager if possible,
otherwise download the binary executable from the <a href="https://github.com/ninja-build/ninja/releases">Ninja project's
release page</a>.</p>
<p>If you will only use the Visual Studio backend (<code>--backend=vs</code>) to
generate Visual Studio solutions on Windows or the XCode backend
(<code>--backend=xcode</code>) to generate XCode projects on macOS, you do not
need Ninja.</p>
<h1 id="platformspecific-install-quirks">Platform-specific install quirks</h1>
<h2 id="windows-python3-quirks">Windows Python3 quirks</h2>
<p>When installing Python 3, it is highly recommended (but not required)
that you select the installer options as follows:</p>
<p><img src="images/py3-install-1.png" alt="installer step 1" title="Enable 'Add Python 3.6 to PATH' and click 'Customize installation'" id="installer-step-1">
<img src="images/py3-install-2.png" alt="installer step 2" title="Optional Features: ensure 'pip' is enabled" id="installer-step-2">
<img src="images/py3-install-3.png" alt="installer step 3" title="Advanced Options: enable 'Install for all users'" id="installer-step-3"></p>
<p>With this, you will have <code>python</code> and <code>pip</code> in <code>PATH</code>, and you can
install Meson with pip. You will also be able to directly run <code>meson</code>
in any shell on Windows instead of having to run <code>py -3</code> with the full
path to the <code>meson.py</code> script.</p>
<h2 id="msys2-python3-quirks">MSYS2 Python3 quirks</h2>
<p>If you are using MSYS2 on Windows as your development environment,
please make sure that you <strong>do not use</strong> the <code>msys/python</code> package to
provide Python 3. Use either <code>mingw32/mingw-w64-i686-python3</code> or
<code>mingw64/mingw-w64-x86_64-python3</code> depending on which MinGW target you
are building for.</p>
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