Link error: QMetaObject with cmake when compiling VTK example

[gde23]

Hello,
i am trying to compile a Qt (Qt5.8) / VTK (8.0.0) example from here.

I am using cmake and i have
set(CMAKE_AUTOMOC ON)

However i get a linking error with QMetaObject.

Error:

RenderWindowUIMultipleInheritance.cxx.obj:-1: error: LNK2001: unresolved external symbol "public: static struct QMetaObject const QVTKWidget::staticMetaObject" (?staticMetaObject@QVTKWidget@@2UQMetaObject@@B)
RenderWindowUIMultipleInheritanceDriver.cxx.obj:-1: error: LNK2001: unresolved external symbol "public: static struct QMetaObject const QVTKWidget::staticMetaObject" (?staticMetaObject@QVTKWidget@@2UQMetaObject@@B)
moc_compilation.cpp.obj:-1: error: LNK2001: unresolved external symbol "public: static struct QMetaObject const QVTKWidget::staticMetaObject" (?staticMetaObject@QVTKWidget@@2UQMetaObject@@B)

Here is the CMakeLists.txt i use for the project

cmake_minimum_required(VERSION 2.8)

if(POLICY CMP0020)
  cmake_policy(SET CMP0020 NEW)
endif()

PROJECT(RenderWindowUIMultipleInheritance)

find_package(VTK REQUIRED)
include(${VTK_USE_FILE})

# Instruct CMake to run moc automatically when needed.
set(CMAKE_AUTOMOC ON)
find_package(Qt5Widgets REQUIRED QUIET)

include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR})

file(GLOB UI_FILES *.ui)
file(GLOB QT_WRAP *.h)
file(GLOB CXX_FILES *.cxx)

qt5_wrap_ui(UISrcs ${UI_FILES} )
# CMAKE_AUTOMOC in ON so the MOC headers will be automatically wrapped.
add_executable(RenderWindowUIMultipleInheritance MACOSX_BUNDLE
${CXX_FILES} ${UISrcs} ${QT_WRAP})
qt5_use_modules(RenderWindowUIMultipleInheritance Core Gui)
target_link_libraries(RenderWindowUIMultipleInheritance ${VTK_LIBRARIES})

any ideas where the problem is?

[gde23]

Found the error myself.
In the include dir there still was the file vtkGUISupportQtModule.h from the vtk-build included which defines

VTKGUISUPPORTQT_EXPORT __declspec(dllexport)

now its working