My apologies, I'm not sure where the confusion comes from. I thought I made it clear that there were Perl core modules, and Perl CPAN modules. The other difference is "pure Perl", which means no XS. A Perl core module can be "pure Perl", or include C code. However, if the target node has a version of Perl compiled for that OS and architecture combination, then they should have what they need. If a CPAN module needs to be compiled then the target node needs to have a compiler toolset available. Some nodes cannot do that.

Does that help?