My app is linked against -lxml2. The trouble is the PmmNodeToSv is provided by the perl library, not the c library.
i.e. PmmNodeToSv is in: /usr/lib/perl5/vendor_perl/5.8.3/i686-linux/auto/XML/LibXML/LibXML.so
I could link against that I guess, but how to find out where that library is on other peoples systems cleanly?