Creating modules might be easier.

From your story, I guess the files don't have package declarations. To wrap them in packages, try: 

{
    package Foo;
    require 'bar.pl';
}

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- Yes, I reinvent wheels.
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In reply to Re: isolating slurped-in code to a namespace by Juerd
in thread isolating slurped-in code to a namespace by blahblah

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