Kopfschmerzen wrote:

I’ve installed a Qt SDK 1.0.1 and created a simple (empty, actually) GUI application.

I think you have installed the Nokia SDK 1.0.1. To compile on desktop, you would also need to install the Qt libraries (4.7.1 is the latest, requires MinGW preinstalled)

Seems like you’re right. That’s confusing! There are “Qt libraries 4.7.1 for Windows (minGW 4.4, 319 MB)” available to download. May I simply install it after the SDK? I mean, will it work automatically, or do I need to reinstall everything in particular order?

no you can install it later, and then from the Creator installed via the Nokia SDK you can then select which Qt version you want to use by … Tools->Options->Qt4

you just have to point the qmake location (this is your <4.7.1 folder>\bin\qmake.exe
and the location to MinGW directory. MinGW is not shipped with Qt 4.7.1 libraries

Do you have Qt SDK 4.7.0 installed earlier? In that case the MinGW is also installed and the directory is already available there.
Else for starters, its easier to just install the Qt SDK from here [qt.nokia.com] and later try 4.7.1

I just installed 4.7.1, set a path to the qmake and it did the trick. Thank you!