Hi all: I'm trying to get a G5 to configure with 64 bit limbs instead of 32, but every time I run "configure guess" it fails to recognize the system, and will configure for a generic powerpc32 build. Any thoughts on how to get a 64 bit build?  I'm working with a Apple G5 with Darwin 8.2.0, gcc 4.0.0, and OS 10.4.2.   Thanks! Blake 