Compiling 2.5.1 on OpenBSD 4.1

[nazgul]

> I don't have OpenBSD available, so I have to do all my research over
> the web. I would really appreciate if this problem could be solved
> "for good". In the past, it was always difficult that the *BSDs would
> hide interfaces if I say that my program uses XOPEN/Unix. Python
> uses a "POSIX+" approach: use POSIX interfaces where available;
> use platform-specific ones elsewhere.
> 

I'll be happy to test anything you want WRT OpenBSD.  I have one here and I 
don't think it's going anywhere.

> 
> I see. The macros _BSD_SOURCE didn't actually get defined.
> Please try the revised patch below.
> 

This looks to have fixed it.  Build was succesful.  Thanks!

dnm