include "QDialog" etc not found after upgrade from 5.4 to 5.6

[anda_skoa]

I agree that putting in the QT += widgets in my pro file will partially solve the problem. But I never had to do this with the QT5.4 setup I had before.

Than this worked by accident, qmake requires to know which modules to use for both the include paths and the libraries to link to and "widgets" is required for QtWidgets since 5.0.

Adding "widgets" is one of the things that need to be done when porting from Qt4 to Qt5, as QtWidgets was split from QtGui into its own module.

I thought the qmake -project would detect what qt libs I need and dynamically create the pro file for me.

No, I think it only detects the sources and headers.

It is quite handy and safes me lots of time when moving between my development environments (Which are not identical).

Then it might be worth considering always using the same build system or using something that can generate input for all required build systems.
E.g. qmake can not only generate Makefiles, it can also generate visual studio project files.

CMake has even more output generators.

Cheers,
_

[gig-raf]

Thanks guys. I can not thank you enough for the help.

You are right, I most completely starred myself blind on this problem. Of course I have to update the pro files and add in my include and QT libs manually. I was so sure that qmake -project would do that for me that I completely ruled it out.

So when I removed the pro file and setup the project again things stopped working.


...I hang my head in shame!