The perlxs manual says that prototypes can be enabled and disabled but I find no guidance for how to use a predefined C prototype

What is "predefined C prototype"?

http://perldoc.perl.org/perlxs.html#The-PROTOTYPES%3a-Keyword is talking about sub iTakeOneScalar($){..]

In reply to Re: Prototype problem for XS module by Anonymous Monk
in thread Prototype problem for XS module by chessgui

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