Creator / cmake: Header file of promoted widgets not found

[FX David]

I am creating a cmake project in QtCreator 20.0.0 and while I usually work with MSVC, I am now trying to compile the project using another kit. However, doing so triggers an error where the header files of my promoted widgets cannot be found, like this one:

In file included from C:\Users\...\source\repos\wasmwidgets\mainwindow.cpp:2:
C:/Users/.../source/repos/wasmwidgets/build/Desktop_Qt_6_11_1_MinGW_64_bit_Debug/wasmwidgets_autogen/include/ui_mainwindow.h:18:10: fatal error: label.h: No such file or directory
   18 | #include <label.h>
      |          ^~~~~~~~~

To make sure I was not messing up something, I started with a fresh Widgets project:

• Create a new Qt Widgets project, with CMake.
• Open the automatically-created MainWindow.ui and add a QLabel in it.
• Compile the project and run.
  This should be successful with all kits.
• Create a subclass of QLabel(Let's call it Label); it does not need to override any method from QLabel.
  Promote the label created in step 2. to that new class. It seems not to matter whether or not you tick "Global Include".
• Recompile the project.
  It now is successful only with MSVC, but it fails with e.g. MinGW and Emscripten.

I do not see a meaningful difference between e.g. the below 2 configurations.

Would you know what is wrong here?

[Christian Ehrlicher]

You forgot to add the directory where label.h is in to your include directories for your compiler.

[FX David]

I never thought I'd have to add the current folder (.). That solved my issue indeed.