Is there any particular reason that you must use the latest-and-greatest version from CPAN?
Have you tried the Ubuntu-provided "libdbd-odbc-perl" package?

Regarding "iodbc-config", that is present in the "libiodbc2-dev" package.

In general, if you're looking for available packages for your Ubuntu system, you can use "apt-cache search" on the command line or use the Ubuntu Packages page. It is likely that everything you need can be installed without going to CPAN.