One possible solution (other than modifying the Tk module)
is to use the technique you're thinking of with the
$Home = $ENV{'HOME'};
statement. Keep a few things in mind:
your $Home will be in your namespace (probably main),
while Tk's is in the Tk namespace, so you'd have to
do something like this:
$Tk::Home = $ENV{'HOME'};
your code (probably) won't get executed untill after
the Tk module unless you surround it in a BEGIN block,
like this:
BEGIN { $Tk::Home = $ENV{'HOME'}; }
The best thing to do is probably to do as already suggested,
get the newest version of Tk, and fix and submit the patch
if necessary.
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