dlclose() doesn't unload any .so that uses Boost

[Jakub Jelinek]

On Tue, May 31, 2011 at 08:43:45AM +0200, J wrote:
> I've managed to track this issue down. It looks like a bug in GCC:

Most likely the difference is just that g++-4.6 emits STB_GNU_UNIQUE
symbols while g++-4.4 doesn't.  And, when any STB_GNU_UNIQUE symbols
are resolved against some library, it is marked as nodelete.
Therefore, NOTABUG.

	Jakub