pthread_sigmask module

[Jeff Sheltren]

Hi, I am having some problems with the build server hanging (ie.  
there are no jobs running, but when I submit a job it sits with  
status 'waiting')...

Since this is running on EL4 (python 2.3.4), I'm getting this message  
when I start up plague-builder:

WARNING: You might want to install the pthread_sigmask module.
Python versions earlier than 2.4 have problems with signals and
spawned processes.

I'm guessing this is related to my problem :)  So the question is,  
where can I find this module?

Thanks,
Jeff