Unsolved Qt Creator trying to build qml-puppet with invalid parameters for compiler

[Flole]

Hi,

I've cross-compiled Qt 5.12 for an arm platform using the latest available toolchain for that target. When I try to edit a UI in Qt creator it tries to build qml-puppet but fails as --std=gnu++1z is not a supported option for my cross-compiler. Unfortunately I don't know why it is trying to use that parameter and if it's really necessary. I can however build my project perfectly fine and run it on the target. Why is qml-puppet even compiled for the target, shouldn't it run on the host?

Any help is appreciated.