Building gdb from source

[DJ Delorie]

>   The point is, that a distro should have a consistent set of gcc,
> binutils and gdb.

Since gcc, binutils, and gdb do not coordinate their release cycles,
it's impossible to do so.

As a side note, libiberty was never intended to be *installed* as a
library.  It exists to help port projects within their build tree, and
we DO NOT guarantee any usefulness outside a build tree (although we
try to avoid gratuitously breaking binary compatibility).

I suspect that the installation of libiberty bits has "just happened"
over time, and probably should be disabled by default anyway.