Hi,
When configuring xotcl in any way whatsoever, if the configure step determines it should build with aolserver extensions, it assumes the only possible place for aolserver is in /usr/local/aolserver, a mistaken assumption for the same reason that it's possible to install cat or grep in any location on the unix installation.
The right way to do this is to add a configure.in option which would include a specification of where aolserver is located. Suggestion, this option could be named --with-aolserver=<dir>. Also, there should exist --without-aolserver.
-Jim