Adds latest migration results

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

@@ -5,6 +5,14 @@
 # Created by Patric Karwat, SLSE, 2018-01-17
 #
 
+# Make ${Qt6_Widgets} optional
+if(QT6_GUI_AVAILABLE AND TARGET Qt6::Widgets)
+  set(Qt6_Widgets ${Qt6_Widgets})
+else()
+  set(Qt6_Widgets "")
+endif()
+
+
 SET(vbk_SRCS
   vkb_gui_plugin.cpp
   vkb_gui_plugin.h
@@ -12,14 +20,16 @@ SET(vbk_SRCS
 
 
 NGL_ADD_LIBRARY(WS VkbPlugin MODULE ${vbk_SRCS})
-NGL_TARGET_LINK_LIBRARIES(VkbPlugin
-  NGLLogger
-  LtsSession
-  LtsSessionData
-  LtsWidgets
-  LtsVirtualKeyboard
-  VbkGuiPluginInterface
-  Qt6::Widgets
-)
+if(QT6_GUI_AVAILABLE)
+  NGL_TARGET_LINK_LIBRARIES(VkbPlugin
+    NGLLogger
+    LtsSession
+    LtsSessionData
+    LtsWidgets
+    LtsVirtualKeyboard
+    VbkGuiPluginInterface
+    ${Qt6_Widgets}
+  )
+endif()
 
 NGL_INSTALL_TARGET(VkbPlugin)