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Cython.html
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<!DOCTYPE html>
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<title>Cython</title>
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<h1 id="cython">Cython</h1>
<p>Meson provides native support for cython programs starting with version 0.59.0.
This means that you can include it as a normal language, and create targets like
any other supported language:</p>
<pre><code class="language-meson">lib = static_library(
'foo',
'foo.pyx',
)
</code></pre>
<p>Generally Cython is most useful when combined with the python module's
extension_module method:</p>
<pre><code class="language-meson">project('my project', 'cython')
py = import('python').find_installation()
dep_py = py.dependency()
py.extension_module(
'foo',
'foo.pyx',
dependencies : dep_py,
)
</code></pre>
<p>You can pass arguments accepted by the <code>cython</code> CLI script with the
<code>cython_args</code> argument:</p>
<pre><code class="language-meson">py.extension_module(
'foo-bounds'
'foo.pyx',
dependencies : dep_py,
cython_args : ['-Xboundscheck=False'],
)
</code></pre>
<h2 id="c-intermediate-support">C++ intermediate support</h2>
<p><em>(New in 0.60.0)</em></p>
<p>An option has been added to control this, called <code>cython_language</code>. This can be
either <code>'c'</code> or <code>'cpp'</code>.</p>
<p>For those coming from setuptools/distutils, they will find two things. First,
meson ignores <code># distutils: language = c++</code> inline directives. Second that Meson
allows options only on a per-target granularity. This means that if you need to mix
cython files being transpiled to C and to C++ you need two targets:</p>
<pre><code class="language-meson">project('my project', 'cython')
cython_cpp_lib = static_library(
'helper_lib',
'foo_cpp.pyx', # will be transpiled to C++
override_options : ['cython_language=cpp'],
)
py.extension_module(
'foo',
'foo.pyx', # will be transpiled to C
link_with : [cython_cpp_lib],
dependencies : dep_py,
)
</code></pre>
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