[Solved] Add an extern function to qguiapplication.cpp

[Lachrymology]

Hi all,

I've a strange behaviour compiling Qt with a changed qguiapplication.cpp.

I've added the following code to the file:

#if defined(Q_OS_WIN)
  bool gHandlingEnabled = false;
  
  extern "C" __declspec(dllexport) void __stdcall setHandling(bool aEnable)
  {
    gHandlingEnabled = aEnable;
  }
#endif // Q_OS_WIN

My problem is that the function setHandling isn't available in Qt5Gui.dll after the build.

If I don't use the #ifdef section the function is available. What's the matter with Q_OS_WIN? Do I need to include qsystemdetection.h?

Kind regards,
Mike

EDIT: Solved - yes it was the missing include of qsystemdetection.h