CFChatterClient source code not compiling

i downloaded the CFChatterClient code (chapter 12) from “Advanced Mac OS X Programming” publisher’s website, and i can’t get xcode to compile it properly. i keep getting a:
Jam is deprecated and has been removed; targets that use Jam must be upgraded to native targets. For more information on doing this, consult the Xcode documentation.

error. any ideas on how to get this to compile? using snow leopard with the latest version of xcode.