Building 8.1.11 on FC4

Good morning everyone!

As you may have guessed from previous posts, i just recently migrated my
main database server from 7.4.x to 8.1.11. This part went pretty smoothly.
:)

One of the client machines in my architecture is a Fedora Core 4 box. I
unfortunately cannot change this so I had to build 8.1.11 packages. When I
was building the packages it would fail unless I passed 'pgfts 0'.

Of course now, I am running into deadlock issues that never existed before.
There have been no code changes and the behavior of the code seems to
suggest to me that threads may be the issue.

Has anyone actually built 8.1.x on FC4? My guess is that I just need a
little trick to force rpmbuild to finish successfully with thread safe
enabled but it has been suggested that perhaps FC4 is not capable of being
thread safe. So if anyone could offer any advice that might help me sort
this out, I would truly appreciate it.

TIA

-bill