I neglected to include that I originally tried the top of the tree. Then, when that failed (required librt.so.1, which is not available for Sol2.6) I backed up to the most recent one which reported successful testing for solaris 2.6 on CPAN. All told, I spent about 6 hours tracing through dependencies, installing libraries, compilers, new makes, testing versions, changing the order of installation... all to have the developer tell me that he switched to ksh.
I love my life, sometimes. Thank Larry that I get paid OT.