[CentOS] Building for older versions

[Chris Adams]

Once upon a time, Michael Eager <eager at eagerm.com> said:
> Building on an older version of CentOS means using older compilers and
> libraries.  Some applications require building with more current tools.

Maybe try an older base OS but with tools from a software collection
add-on?  That's trickier to do with mock (I figured it out once but
don't remember now).

-- 
Chris Adams <linux at cmadams.net>