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GetOptions::Long question
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I am trying to use GetOptions in such a way that if the user does not
provide the correct mandatory arguments, the usage sub is called. The
problem is that even when I call it correctly, it is going into the
usage() sub. Can you see anything from the example below?

# parse command line args
my $show_usage = 0;
'h|help' => \$show_usage,
'l|location=s' => \$location,
'b|base=s' => \$base
) or $show_usage = 1;

if ($show_usage == 1) { usage(); exit 64 }


sub usage() {
print <<EOF;

Usage: $0 .... etc

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