Fixed linker problems and added version specific qt packages

src/OpenMesh/Apps/CMakeLists.txt

@@ -48,6 +48,9 @@ if ( BUILD_APPS )
         OpenGL
         Gui
         )
+      set(QT6_REQUIRED_PACKAGES
+        OpenGLWidgets
+        )
       vci_qt ()
       set(CMAKE_AUTOMOC ON)
     endif()

src/OpenMesh/Apps/Decimating/DecimaterGui/CMakeLists.txt

@@ -30,6 +30,12 @@ target_link_libraries (DecimaterGui
   OpenMeshCore
   OpenMeshTools
   ${QT_TARGET}::OpenGL
+  ${QT_TARGET}::Widgets
+  ${QT_TARGET}::Gui
   ${OPENGL_LIBRARIES}
 )
 
+if (QT_VERSION_MAJOR GREATER 5)
+  target_link_libraries (DecimaterGui ${QT_TARGET}::OpenGLWidgets)
+endif()
+

src/OpenMesh/Apps/ProgViewer/CMakeLists.txt

@@ -29,6 +29,12 @@ target_link_libraries ( ProgViewer
   OpenMeshCore
   OpenMeshTools
   ${QT_TARGET}::OpenGL
+  ${QT_TARGET}::Widgets
+  ${QT_TARGET}::Gui
   ${OPENGL_LIBRARIES}
 )
 
+if (QT_VERSION_MAJOR GREATER 5)
+  target_link_libraries (ProgViewer ${QT_TARGET}::OpenGLWidgets)
+endif()
+

src/OpenMesh/Apps/QtViewer/CMakeLists.txt

@@ -31,6 +31,12 @@ target_link_libraries (QtViewer
   OpenMeshCore
   OpenMeshTools
   ${QT_TARGET}::OpenGL
+  ${QT_TARGET}::Widgets
+  ${QT_TARGET}::Gui
   ${OPENGL_LIBRARIES}
 )
 
+if (QT_VERSION_MAJOR GREATER 5)
+  target_link_libraries (QtViewer ${QT_TARGET}::OpenGLWidgets)
+endif()
+

src/OpenMesh/Apps/Subdivider/SubdividerGui/CMakeLists.txt

@@ -29,6 +29,11 @@ target_link_libraries (SubdividerGui
   OpenMeshCore
   OpenMeshTools
   ${QT_TARGET}::OpenGL
+  ${QT_TARGET}::Widgets
+  ${QT_TARGET}::Gui
   ${OPENGL_LIBRARIES}
 )
 
+if (QT_VERSION_MAJOR GREATER 5)
+  target_link_libraries (SubdividerGui ${QT_TARGET}::OpenGLWidgets)
+endif()

src/OpenMesh/Apps/VDProgMesh/Synthesizer/CMakeLists.txt

@@ -26,5 +26,11 @@ target_link_libraries (Synthesizer
   OpenMeshCore
   OpenMeshTools
   ${QT_TARGET}::OpenGL
+  ${QT_TARGET}::Widgets
+  ${QT_TARGET}::Gui
   ${OPENGL_LIBRARIES}
 )
+
+if (QT_VERSION_MAJOR GREATER 5)
+  target_link_libraries (Synthesizer ${QT_TARGET}::OpenGLWidgets)
+endif()