Don't use string eval, especially when you don't need to. Try something like 
sub _deprecated {
    my $sh = shift;
    require Carp;
    Carp::carp("$sh() is deprecated; ".
"see the documentation for an alternative;");
...
}

sub import {
...

for (@_){
  *{"$pkg\::$_"} = sub { _deprecated($_) };
}

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In reply to Re: use deprecated; by Anonymous Monk
in thread use deprecated; by halley

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