Built on a Pentium II machine, unfortunately; I wanted to build it on the
oldest machine I could find, for maximum compatibility, but in a choice
between a 486 running redhat 5.2 and a pentium II running redhat 5.0 I
chose the redhat 5.0 machine... I think that this was the right choice;
I don't think it's got anything pentium-II-specific compiled into it as the
"glibc" rpm says "386".

I've found that this (also) runs on a plain pentium (with redhat 5.2),
and [about to test] on a 486 running redhat 5.2.  So I think it will run
on just about anything running redhat linux 5.x or 6.x.