[ewg] OFED 1.5.2rc4 fails to build on RHEL4 Update 8 x86_64

[Hefty, Sean]

> The same issue exist on RHEL5.x 32-bit.
> See https://bugs.openfabrics.org/show_bug.cgi?id=2105
> 
> Can you fix this for OFED-1.5.2-rc5?

I can try, but I don't know what the fix should be.  These calls are typically provided directly by gcc and not some external library.  Requiring the use to update their version of gcc seems just as easy as requiring that they install a specific version of some other library.

It looks like the only guaranteed way to build is to implement the atomics ourselves, but I'd like to avoid that.

- Sean