Would autoloading work for you?

#! perl -slw
use strict;

sub AUTOLOAD {
    no strict 'refs';
    our $AUTOLOAD;
    my $funcname = $AUTOLOAD;
    my $sub = *{ $AUTOLOAD } = sub { print "$funcname called with [@_]
+"; };
    print "sub $AUTOLOAD autoloaded";
    goto \&$sub;
}

fred( 1,2,3,4, 5 );
fred( 'a'..'d');

__END__
C:\test>autoload-t.pl
sub main::fred autoloaded
main::fred called with [1 2 3 4 5]
main::fred called with [a b c d]
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