I tried creating my own recipe for xpath lib for perl
from the source in

"http://www.cpan.org/modules/by-module/XML/XML-XPath-1.13.tar.gz"

I mimicked all the other perl library recipes (i.e. libxml-parser-perl, libxml-dom-perl, etc...)

only mine fails to parse everytime because of the last line the BBCLASSEXTEND="native"

I get the following error (see below) and can't figure out what to change to make this work. 
It seems as though my perl library needs to be added to some native list of perl libraries,
 but I can't find that list or what to modify to get it to think this recipe is ok.

Please Help!
Thanks

ERROR: Parsing error data_fn virtual:native:/home/.../overo-oe/user.collection/recipes/perl/libxml-xpath-perl_1.13.bb and fn /home/.../overo-oe/user.collection/recipes/perl/libxml-xpath-perl_1.13.bb don't match
DEBUG: providers for libxml-xpath-perl-native are: ['libxml-xpath-perl-native']
Traceback (most recent call last):
  File "/gs/overo-oe/bitbake/bin/bitbake", line 143, in <module>
    main()
  File "/gs/overo-oe/bitbake/bin/bitbake", line 140, in main
    cooker.cook()
  File "/gs/overo-oe/bitbake/lib/bb/cooker.py", line 608, in cook
    if not self.buildFile(self.configuration.buildfile):
  File "/gs/overo-oe/bitbake/lib/bb/cooker.py", line 500, in buildFile
    taskdata.add_provider(self.configuration.data, self.status, item)
  File "/gs/overo-oe/bitbake/lib/bb/taskdata.py", line 340, in add_provider
    self.add_provider_internal(cfgData, dataCache, item)
  File "/gs/overo-oe/bitbake/lib/bb/taskdata.py", line 376, in add_provider_internal
    eligible, foundUnique = bb.providers.filterProviders(all_p, item, cfgData, dataCache)
  File "/gs/overo-oe/bitbake/lib/bb/providers.py", line 226, in filterProviders
    eligible = _filterProviders(providers, item, cfgData, dataCache)
  File "/gs/overo-oe/bitbake/lib/bb/providers.py", line 188, in _filterProviders
    sortpkg_pn[pn] = sortPriorities(pn, dataCache, pkg_pn)
  File "/gs/overo-oe/bitbake/lib/bb/providers.py", line 46, in sortPriorities
    priority = dataCache.bbfile_priority[f]
KeyError: 'virtual:native:/home/.../overo-oe/user.collection/recipes/perl/libxml-xpath-perl_1.13.bb'