C:\perl64_51822>cpanm Win32::SerialPort
--> Working on Win32::SerialPort
Fetching http://www.cpan.org/authors/id/B/BB/BBIRTH/Win32-SerialPort-0.22.tar.gz ... OK
Configuring Win32-SerialPort-0.22 ... N/A
! Configure failed for Win32-SerialPort-0.22. See C:\PERL64~1\data\.cpanm\work\1397846877.6344\build.log for details.