asterisk users - Nov 2011 - Dependencies for BETTER_BACKTRACES on Centos 5.6

Hi

I'm struggling to find the dependencies to allow me to tick
BETTER_BACKTRACES while installing asterisk 1.8.7 on CentOS 5.6

Does anyone know what I need to install to do this?

Regards

Ish
-- 
Ishfaq Malik
Software Developer
PackNet Ltd

Office:   0161 660 3062