[PATCH] basename buffer gets spammed in `ld'

[DJ Delorie]

> I think libibery should check if the system's basename behaves
> the same as the one in libibery before using the system one. I
> can try to write a test for it.

Libiberty provides lbasename() for when you know you want a fixed set
of semantics.  You can't test for functionality in libiberty, only for
the presence or absense of a function (think "cross compiler").