cross-platform libraries.</p>
<p>For example, here is what we have on Closure CL:</p>
<pre><code class='lisp'>CL-USER&gt; (lisp-implementation-type)
&quot;Clozure Common Lisp&quot;

CL-USER&gt; (member :64-bit *features*)
NIL

CL-USER&gt; (member :darwin *features*)
(:DARWIN :LITTLE-ENDIAN-TARGET :LITTLE-ENDIAN-HOST)

CL-USER&gt; (member :little-endian *features*)
NIL

CL-USER&gt; (member :x86-64 *features*)
(:X86-64 :X86_64 :X86-TARGET :X86-HOST :X8664-TARGET ...)</code></pre><p>But after the loading of th