I want to start updating my libraries so I can install some current packages
(i.e. Snd).  Starting with glibc, I find several possible downloads on the
rpm repository.
glibc-2.1-1a
glibc-debug-2.1-1a
glibc-devel-2.1-1a
glibc-profile-2.1-1a

Which one (or more) do I need?
I know that at startup, my system does get environment variables, PATH, and
export from the /etc/profile file.  Is this a different "profile"? or does
this mean I NEED glibc-profile-2.1-1a?
As a MkLinux usr, I have a feeling I will find most of my packages in .src
rather than .bin.

David