He doesn't say XS/C code is portable, but that it can be used to hide portability issues providing OS agnostic APIs to be used from Perl code.
It is how the Perl core works. It deals with every OS quirk and custom, hidden them to the Perl programmer. And XS/C code can be used to do the same.
Well, at least that is my reading.
In reply to Re^3: Most direct way of loading XS?
by salva
in thread Most direct way of loading XS?
by YenForYang
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