It turns out I do have threading enabled. I examined *features* and it does contain :sb-thread. So, perhaps some other features are necessary for this to work. In particular, it seems the kernel needs NPTL support (native posix thread library).
According to getconf, I have that also. There are some bugs floating around that reference ubuntu and sbcl though; I guess probably it is some low-level problem related to my particular linux config.<br><br>I will keep looking and in the meantime lispworks will be the alternative.
<br><br>regards,<br>Keith<br><br><div><span class="gmail_quote">On 8/8/06, <b class="gmail_sendername">Edi Weitz</b> &lt;<a href="mailto:edi@agharta.de" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">

edi@agharta.de</a>&gt; wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
On Tue, 8 Aug 2006 10:45:08 -0400, &quot;Keith Orpen&quot; &lt;<a href="mailto:keithorpen@gmail.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">keithorpen@gmail.com</a>&gt; wrote:<br><br>&gt; I suspect I have built sbcl without thread support despite my
<br>&gt; intentions, but I'm not sure how to tell.
<br><br>I think you'll have to ask the SBCL experts.&nbsp;&nbsp;I usually don't use<br>SBCL.<br></blockquote></div><br>