CentOS - Apr 2012 - 32/64-bit Library Sharing and Placement

Good evening...

I'm rebuilding much of the gnu toolchain for some development testing
I'm working.? GMP, MPC, MPFR, PPL, as well as many others.? I need to be
able to have both 32 and 64 bit versions of these libraries avilable on the
system, in more or less the same path (/toolchain/lib, /toolchain/lib64).?

Generically speaking, is there an easy way to build both 32 and 64 bit versions
a the same time???? Or, more specifically, what is the best way to get both
versions built???

CentOS 6.2 on a Dell 1900 with Xeon 5130 CPU's.

-b

I'm rebuilding much of the gnu toolchain for some development testing
I'm working.? GMP, MPC, MPFR, PPL, as well as many others.? I need to be
able to have both 32 and 64 bit versions of these libraries avilable on the
system, in more or less the same path (/toolchain/lib, /toolchain/lib64).?
 
Generically speaking, is there an easy way to build both 32 and 64 bit versions
a the same time???? Or, more specifically, what is the best way to get both
versions built???
 
CentOS 6.2 on a Dell 1900 with Xeon 5130 CPU's.

After a few more hours of digging, I believe what I'm wanting is multilib???

Is there a way to get a 32 and 64 bit build (multilib?) in one pass?  If not,
what is the easiest way to do this?

-brian