Qt Creator hardcodes -spec linux-g++-32 for the qmake build step when using a cross-compiled Qt

The qmake build step created for a Qt project using a cross-compiled Qt version has "-spec linux-g++-32" hardcoded in the command line. This is incorrect as this is the host makespec, but we want the target makespec.

The only way to work around this bug currently is to remove the qmake build step and add a Custom Process step, where the qmake command is ran without -spec argument, then the target makespec is automatically picked up. I'm wondering why the -spec argument is needed at all, qmake already know which default makespec to use.