Math::Pari is only an interface to pari/gp which needs to be installed

All you need do is install the Math::Pari module. To do that, you will need to grab the pari source, but you don't have to build GP/PARI - see the instructions at http://cpansearch.perl.org/src/ILYAZ/Math-Pari-2.01080603/INSTALL.

Last time I tried, Math::Pari wouldn't build with the pari-2.3.4 source, so (I think) I used the pari-2.1.7 source, which was fine. Perhaps that has changed with latest Math::Pari releases - last version I built was 2.010800.

Cheers,
Rob