Adds latest migration results

qt6-after/qt6-migrated-legatus/Lts/Plugins/BuildingViewer/Gui/BuildingViewer/CMakeLists.txt

@@ -6,6 +6,14 @@
 # Created by Mike Wille, SLSE, 2017-05-15
 #
 
+# Make ${Qt6_Widgets} optional
+if(QT6_GUI_AVAILABLE AND TARGET Qt6::Widgets)
+  set(Qt6_Widgets ${Qt6_Widgets})
+else()
+  set(Qt6_Widgets "")
+endif()
+
+
 SET(SRCS
   BuildingEdit/bdv_building_edit.cpp
   BuildingEdit/bdv_building_edit.h
@@ -52,29 +60,31 @@ NGL_WRAP_UI(SRCS
 
 NGL_ADD_LIBRARY(WS BdvViewerGuiPlugin MODULE ${SRCS})
 
-NGL_TARGET_LINK_LIBRARIES(BdvViewerGuiPlugin
-  BdvViewerGuiPluginInterface
-  BldDataPluginInterface
-  BuildingViewerCommon
-  PreScriptTimelineGuiPluginInterface # Export
-  svcBldCommon
-  svcBldClient
-  svcAesClient
-  svcSrpClient
-  LtsDataView
-  LtsPluginManager
-  LtsScriptTimeline # TopicEditor
-  LtsSession
-  LtsWidgets
-  NGLLogger
-  nglwidgets
-  Qt6::Core
-  Qt6::Widgets
-  Qt6::Xml
-  TopicEditorBase
-  LtsUtilsGuiDds
-  LtsUtilsSettings
-  ngltools
-  ExportBdvTopicSetting
-)
+if(QT6_GUI_AVAILABLE)
+  NGL_TARGET_LINK_LIBRARIES(BdvViewerGuiPlugin
+    BdvViewerGuiPluginInterface
+    BldDataPluginInterface
+    BuildingViewerCommon
+    PreScriptTimelineGuiPluginInterface # Export
+    svcBldCommon
+    svcBldClient
+    svcAesClient
+    svcSrpClient
+    LtsDataView
+    LtsPluginManager
+    LtsScriptTimeline # TopicEditor
+    LtsSession
+    LtsWidgets
+    NGLLogger
+    nglwidgets
+    Qt6::Core
+    ${Qt6_Widgets}
+    Qt6::Xml
+    TopicEditorBase
+    LtsUtilsGuiDds
+    LtsUtilsSettings
+    ngltools
+    ExportBdvTopicSetting
+  )
+endif()
 NGL_INSTALL_TARGET(BdvViewerGuiPlugin)