Just like the previous answer stated, Cwd qw(abs_path) would do the job just as realpath from the same module would do.
However, one really do not need the readlink function anymore because "..Symbolic links and relative-path components ("." and "..") are resolved to return the canonical pathname.." -- perldoc Cwd. 

   use Cwd qw(abs_path realpath);
   #....

   my $absolute_path = abs_path($link);
   # or ...
   my $absolute_path = realpath($link);

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In reply to Re^2: How to get the absolute path of a symbolic link by 2teez
in thread How to get the absolute path of a symbolic link by ZWcarp

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