configure.exe asks to accept LGPL license even if -opengl configure argument is not complete

Give the following command in Windows to configure Qt (4.7.2) from Git:

C:\src\qt\qt>configure.exe -opensource -opengl -developer-build

Configure outputs:

Argument passed to -opengl option is not valid.      !! <<-- Note the error here

This is the Qt for Windows Open Source Edition.

You are licensed to use this software under the terms of
the GNU Lesser General Public License (LGPL) version 2.1.

Type 'L' to view the Lesser GNU General Public License version 2.1 (LGPLv2.1).
Type 'y' to accept this license offer.
Type 'n' to decline this license offer.

Do you accept the terms of the license?

Hence, it sayst he command is not valid but asks to accept the license agreement anyway. This is of course wrong as it should not display the license prompt. If the user presses 'y' in the prompt, configure will exit without any further notes.

Correct behavior in this case is that configure.exe shows the help output.