Installing gcc: compiler?

[Edd Johnson]

So gcc needs an existing ISO C90  compiler?  Which should I use, and
where should I get it.  I am running Red Hat  EL 4.  I'm running in
circles trying to install a few things, because they all  depend on
each other.  Any help would be  appreciated

Thanks,
Max

(PS, I have the gcc source, but cannot install it. I  have no existing
c compiler installed.  I do not have gcc on my system  installation
disks.)