Cross compilation advice

Hi,

I'm a complete beginner when it comes to cross compilers, however...

I have a Yopy PDA which has a cross compiler that contains a toolchain
based on gcc 2.95.3 and is short on a couple of the more useful widget
libraries (such as Qt). While gcc 2.95.3 wasn't bad, it had some really
annoying bugs and wasn't that hot on C++ templates (if memory serves me
correctly)

I have gcc 4 on my x86 linux boxes. I know I can cross compile as I've
done it before. However, what I would like to do is compile up Qt and
newer versions of gcc using the cross compiler. Question is, how do I do
that?

Assuming that is easy enough, would I use the same procedure for cross
compiling other source code?

I have the cross compiler in /opt

TTFN

Paul