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Next: <a href="Other-Operations.html#Other-Operations" accesskey="n" rel="next">Other Operations</a>, Previous: <a href="Using-ASDF.html#Using-ASDF" accesskey="p" rel="prev">Using ASDF</a>, Up: <a href="Using-ASDF.html#Using-ASDF" accesskey="u" rel="up">Using ASDF</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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<h3 class="section">5.1 Loading a system</h3>

<p>The system <var>foo</var> is loaded (and compiled, if necessary)
by evaluating the following Lisp form:
</p>
<div class="example">
<pre class="example">(asdf:load-system :<var>foo</var>)
</pre></div>

<p>On some implementations (namely recent versions of
ABCL, Clozure CL, CMUCL, ECL, GNU CLISP, MKCL and SBCL),
ASDF hooks into the <code>CL:REQUIRE</code> facility
and you can just use:
</p>
<div class="example">
<pre class="example">(require :<var>foo</var>)
</pre></div>

<p>In older versions of ASDF, you needed to use
<code>(asdf:oos 'asdf:load-op :<var>foo</var>)</code>.
If your ASDF is too old to provide <code>asdf:load-system</code> though
we recommend that you upgrade to ASDF 3.
See <a href="Loading-ASDF.html#Loading-ASDF">Loading ASDF from source</a>.
</p>
<p>Note the name of a system is specified as a string or a symbol.
If a symbol (including a keyword), its name is taken and lowercased.
The name must be a suitable value for the <code>:name</code> initarg
to <code>make-pathname</code> in whatever filesystem the system is to be
found.
</p>
<p>The lower-casing-symbols behaviour is unconventional,
but was selected after some consideration.
The type of systems we want to support
either have lowercase as customary case (Unix, Mac, Windows)
or silently convert lowercase to uppercase (lpns).
</p>



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cl-asdf 2:3.1.4-1 / usr / share / doc / cl-asdf / asdf / Loading-a-system.html
