Qt 5.5 non-commercial + Qwt 6.1.2. + Qt VS Add-in 1.2.4

[Pacu]

I have managed to run the qwt example projects in VS 2013 ultimate (oscilloscope, realitime, etc.). Besides, I can drag and drop qwt widgets in the QtDesigner (opened from inside VS). I can make and run programs containing all the standard widgets. However, if I add Qwt widgets in the QtDesigner, I get build errors of this kind:

error LNK2019: unresolved external symbol “public: __cdecl QwtPlot::QwtPlot(class QWidget *)” (??0QwtPlot@@QEAA@PEAVQWidget@@@Z) referenced in function “public: void __cdecl Ui_QWTutorialClass::setupUi(class QMainWindow *)” (?setupUi@Ui_QWTutorialClass@@QEAAXPEAVQMainWindow @@@Z).

How can I make the programs run?

EDIT: Win 7 x64

[d_stranz]

You have to add the Qwt library to your link options in VS 2013. Look at one of the Qwt examples and do the same thing in your project.

[Pacu]

The Linker -> General -> Additional Library Dependencies are identical, similarly Linker -> Input -> Additional Dependencies ( with <different options> ). What could I be missing?

[d_stranz]

• Are you compiling everything in either 64-bit or 32-bit mode?
• Are you linking all release or all debug programs and libraries? (In other words, you cannot mix release or debug anywhere).
• Is all of your code compiled using the same compiler? (You can't mix and match MSVC and mingw).
• Was Qwt built against the same version of Qt you are using, and with the same version of MSVC?
• Are you using Qwt as a static library or a DLL? If a DLL, did you add QWT_DLL (or whatever the define is) as a preprocessor definition?

[Pacu]

Solved! I was confused by the meaning of <different options> in the project properties. PM me for detailed installation steps if you encounter a similar problem.