QtCreator defaults to qnx-armlev7-qcc when compiling besides proper set blackberry mkspecs

Install a BlackBerry NDK. (And maybe a Qt5 overlay)
Check the mkspec value, set in the Qt versions "Build & Run" tab.
For Qt5 it normally returns blackberry-armle-v7-qcc or blackberry-x86-qcc.
For Qt4 it is always set to default.

Now, setup a Qt4/5 project and check the Project settings and there the build settings in particular.
You will see that it always uses "-spec qnx-armv7le-qcc".
The correct values for Qt5 are
"blackberry-armle-v7-qcc" or "blackberry-x86-qcc"
for Qt4
"blackberry-armv7le-qcc" or "blackberry-x86-qcc"