Change the permissions of Build.PL/Makefile.PL to not-executable.
Remove the POD errors. You can check for POD errors automatically by including Test::Pod to your test suite.
Error: DBD-Oracle-1.53_00/lib/DBD/Oracle/Troubleshooting/Hpux.pod -- Around line 963: '=item' outside of any '=over'Around line 971: Unknown directive: =itme
Add 'use warnings' (or its equivalents) to all modules (this will require perl > 5.6), or convince us that your favorite module is well-known enough and people can easily see the modules warn when something bad happens.
Error: DBD::Oracle, DBD::Oracle::GetInfo