Warning: doing what the previous reply says is really insecure and should not be used!
There is only one thing I can say about that: it is bad, even worse then not using 'use strict'
What will happen is that it will evaluate $varname as perl-code(!), not just as a string.
And Since $varname is really coming from a cgi script, meaning user input, it allows anyone to run commands! secure? I don't think so.
What do you think happens when $varname = qq(system("echo running the echo command");); for example ?
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