How to force tests to issue "NA" reports?

[Robert Rothenberg]

Is there a way tests to determine that a module cannot be installed on a 
platform so that CPANPLUS or CPAN::YACSmoke can issue an "NA" (Not 
Applicable) report?

CPANPLUS relies on module names (e.g. "Solaris::" or "Win32::") but that 
is not always appropriate in cases where a module runs on many platforms 
 except some that do not have the capability.

There's also a separate issue of whether "NA" reports should be issued 
if a library is missing.  (Usually these come out as failures.)

Regards,
Rob
(Co-author of CPAN::YACSmoke)