specifically, -lpthread - some programs have references to symbols in
-lpthread but were not linking against them directly, but were finding
the symbols resolved indirectly through another library. This cause the
build to fail on Fedora 13 and other platforms with strict linkers.
https://bugzilla.redhat.com/show_bug.cgi?id=564876
https://bugzilla.redhat.com/attachment.cgi?id=396176&action=diff
https://bugzilla.redhat.com/attachment.cgi?id=396176&action=edit