in reply to Interfacing Perl with C++, using XS, with external files, and using the STL as parameters and return values.
Your tenacity is to be admired. Thanks for documenting your quest.
Recently I pointed out the perl-xs implementation of google protocol buffers to tye. I dumped my scratch pad into a post: Protocol Buffers and XS
Perhaps you'll be interested to see how that project autogenerates XS around C++.
Cheers,
Matt
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Meditations