87 lines
3.4 KiB
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87 lines
3.4 KiB
HTML
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Copyright (C) 1996-1997, 2000-2005, 2009-2023 Free Software Foundation,
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Copyright (C) 2021 Maxime Devos
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Copyright (C) 2024 Tomas Volf
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Permission is granted to copy, distribute and/or modify this document
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<title>Putting Extensions into Modules (Guile Reference Manual)</title>
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<div class="subsection-level-extent" id="Putting-Extensions-into-Modules">
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<p>
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Previous: <a href="Writing-new-Modules.html" accesskey="p" rel="prev">Writing new Modules</a>, Up: <a href="Using-the-Guile-Module-System.html" accesskey="u" rel="up">Using the Guile Module System</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html" title="Index" rel="index">Index</a>]</p>
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<h4 class="subsection subsubsection-level-set-subsection" id="Putting-Extensions-into-Modules-1"><span>2.5.3 Putting Extensions into Modules<a class="copiable-link" href="#Putting-Extensions-into-Modules-1"> ¶</a></span></h4>
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<p>In addition to Scheme code you can also put things that are defined in
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C into a module.
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</p>
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<p>You do this by writing a small Scheme file that defines the module and
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call <code class="code">load-extension</code> directly in the body of the module.
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</p>
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<div class="example smallexample">
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<pre class="example-preformatted">$ cat /usr/local/share/guile/site/math/bessel.scm
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(define-module (math bessel)
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#:export (j0))
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(load-extension "libguile-bessel" "init_bessel")
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$ file /usr/local/lib/guile/3.0/extensions/libguile-bessel.so
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... ELF 32-bit LSB shared object ...
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$ guile
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scheme@(guile-user)> (use-modules (math bessel))
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scheme@(guile-user)> (j0 2)
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$1 = 0.223890779141236
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</pre></div>
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<p>See <a class="xref" href="Foreign-Extensions.html">Foreign Extensions</a>, for more information.
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