Qt LNK2019: unresolved external symbol "__declspec(dllimport)..." VTK

AnaM

Hello!

I am new with Qt and VTK.
I think I installed everything correctly (VTK in Release mode).

I am trying to run the example in VTK/Examples/Cxx/Qt/BorderWidgetQt. I use CMake, then I open the solution in VS2010 and it builds perfectly (release mode).

BUT, when I try to build the exact same project in Qt Creator I have this errors:

borderwidgetqt.obj:-1: error: LNK2019: unresolved external symbol "__declspec(dllimport) public: static class vtkBorderWidget * __cdecl vtkBorderWidget::New(void)" (_imp?New@vtkBorderWidget@@SAPEAV1@XZ) referenced in function "public: static class vtkSmartPointer<class vtkBorderWidget> __cdecl vtkSmartPointer<class vtkBorderWidget>::New(void)" (?New@?$vtkSmartPointer@VvtkBorderWidget@@@@SA?AV1@XZ)

borderwidgetqt.obj:-1: error: LNK2019: unresolved external symbol "__declspec(dllimport) public: class vtkAlgorithmOutput * __cdecl vtkAlgorithm::GetOutputPort(int)" (_imp?GetOutputPort@vtkAlgorithm@@QEAAPEAVvtkAlgorithmOutput@@H@Z) referenced in function "public: __cdecl BorderWidgetQt::BorderWidgetQt(void)" (??0BorderWidgetQt@@QEAA@XZ)

borderwidgetqt.obj:-1: error: LNK2019: unresolved external symbol "__declspec(dllimport) public: static class vtkSphereSource * __cdecl vtkSphereSource::New(void)" (_imp?New@vtkSphereSource@@SAPEAV1@XZ) referenced in function "public: static class vtkSmartPointer<class vtkSphereSource> __cdecl vtkSmartPointer<class vtkSphereSource>::New(void)" (?New@?$vtkSmartPointer@VvtkSphereSource@@@@SA?AV1@XZ)

It seems that Qt is having problems in finding the dll?

My .pro file is:

QT += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = BorderWidgetQt
TEMPLATE = app
SOURCES += main.cpp
borderwidgetqt.cpp
HEADERS += borderwidgetqt.h
FORMS += borderwidgetqt.ui
INCLUDEPATH += C:\VTK-7\install\include\vtk-7.0
LIBS += -L"C:\VTK-7\install\lib"
-lvtkRenderingCore-7.0
-lvtkChartsCore-7.0
-lvtkCommonCore-7.0
-lvtkFiltersCore-7.0
-lvtkGUISupportQt-7.0
-lvtkImagingCore-7.0
-lvtkInfovisCore-7.0
-lvtkIOCore-7.0
-lvtkViewsCore-7.0

How can I fix this?

Please, I am stuck in here and I can't find any solution for that... I already tried build the project in Qt both in release and debug mode but the errors are the same...

Thank you in advance!!

SGaist

Hi and welcome to devnet,

Are you trying to build this example ?

AnaM

Hello! Thank you!

Yes that example! Any help?

SGaist

I missed something the first time I read your thread. Visual Studio 2010 ? Did you build VTK yourself with that version of VS ?

mrjj

Hi
To add to @SGaist ,
In Creator, you also have selected VS2010 as compiler ?

AnaM

Hello!

I build VTK myself with VS! I build with Release mode, should I build with Debug mode instead?

How do I select VS as compiler in Qt?

Thank you very much!!

jsulm

@AnaM http://doc.qt.io/qtcreator/creator-tool-chains.html

AnaM

@jsulm Yes, The VS is selected as the compiler.
Maybe the problem is the build mode?(release/debug)?

Thank you again

SGaist

I might be insisting but do you have everything build with the same version of MSVC ? Same architecture ?

AnaM

@SGaist Yes, everthing was build with MSVC same version.

SGaist

Wouldn't you be missing the vtkWidgets library in your .pro file ?

AnaM

@SGaist No.
Maybe it's because I am building my project in VS 64 bit and Qt only detects VS compiler 32 bit?
How can I make Qt work with 64 bit?

Thank you!!

SGaist

You have to install a 64bit build of Qt. You can't mix and match libraries of different architectures.

[Edit: fixed wording... Thanks @jsulm]

jsulm

@SGaist said in Qt LNK2019: unresolved external symbol "__declspec(dllimport)..." VTK:

You can mix

You can't mix :-)

wilmer

Hola , para yo resolver este error cambie de modo DEBUG a RELEASE y corrio mi app.