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<title>7.3 Single extension module
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<H1><A NAME=
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<A NAME=
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7.3 Single extension module
Extension modules are specified using the
<span class=
"du-option">ext_modules
</span> option.
<span class=
"du-option">package_dir
</span> has no effect on where extension source files are
found; it only affects the source for pure Python modules. The simplest
case, a single extension module in a single C source file, is:
<div class=
"verbatim"><pre>
If the
<tt class=
"module">foo
</tt> extension belongs in the root package, the setup
<div class=
"verbatim"><pre>
from distutils.core import setup
ext_modules=[Extension('foo', ['foo.c'])],
If the extension actually belongs in a package, say
<tt class=
"module">foopkg
</tt>,
With exactly the same source tree layout, this extension can be put in
the
<tt class=
"module">foopkg
</tt> package simply by changing the name of the
<div class=
"verbatim"><pre>
from distutils.core import setup
ext_modules=[Extension('foopkg.foo', ['foo.c'])],
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<span class=
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2.4.2, documentation updated on
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2005.
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