I'm not sure exactly what you're after, but if it's just a matter of dynamically determining your current working directory: 
use warnings;
use strict;
use Cwd;
my $cwd = getcwd();
my $sms8x18 = $cwd . "\\sms8x18\\src";
print $sms8x18;

[download]
Cheers,
Rob

In reply to Re^3: Dynamic detection of a folder based on the location given by syphilis
in thread Dynamic detection of a folder based on the location given by Anonymous Monk

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