The licensing information in the top level Qt configure script has some errors.
"versions 2.1" is not grammatically correct, it should be "version 2.1".
"versions 3" is not grammatically correct, it should be "version 2".
It refers to both "GNU Lesser General Public License" and "Lesser GNU General Public License". I believe it should consistently be "GNU Lesser General Public License (LGPL)".
Should it also mention that the software can be used under the GNU General Public License (GPL)?
The software is offered under the GPL version 3, but the source code includes the GPL license version 2 in the file LICENSE.GPLv2.