set up LINK_LIBRARIES and INTERFACE_LINK_LIBRARIES correctly for unity target

CMake/cotire.cmake

@@ -3192,21 +3192,21 @@ function (cotire_target_link_libraries _target)
 			message (STATUS "unity target ${_unityTargetName} link strategy: ${_linkLibrariesStrategy}")
 		endif()
 		if ("${_linkLibrariesStrategy}" MATCHES "^(COPY|COPY_UNITY)$")
-			set (_unityLinkLibraries "")
 			get_target_property(_linkLibraries ${_target} LINK_LIBRARIES)
 			if (_linkLibraries)
-				list (APPEND _unityLinkLibraries ${_linkLibraries})
+				cotire_map_libraries("${_linkLibrariesStrategy}" _unityLinkLibraries ${_linkLibraries})
+				set_target_properties(${_unityTargetName} PROPERTIES LINK_LIBRARIES "${_unityLinkLibraries}")
+				if (COTIRE_DEBUG)
+					message (STATUS "unity target ${_unityTargetName} link libraries: ${_unityLinkLibraries}")
+				endif()
 			endif()
 			get_target_property(_interfaceLinkLibraries ${_target} INTERFACE_LINK_LIBRARIES)
 			if (_interfaceLinkLibraries)
-				list (APPEND _unityLinkLibraries ${_interfaceLinkLibraries})
-			endif()
-			cotire_map_libraries("${_linkLibrariesStrategy}" _unityLinkLibraries ${_unityLinkLibraries})
-			if (COTIRE_DEBUG)
-				message (STATUS "unity target ${_unityTargetName} libraries: ${_unityLinkLibraries}")
-			endif()
-			if (_unityLinkLibraries)
-				target_link_libraries(${_unityTargetName} ${_unityLinkLibraries})
+				cotire_map_libraries("${_linkLibrariesStrategy}" _unityLinkInterfaceLibraries ${_interfaceLinkLibraries})
+				set_target_properties(${_unityTargetName} PROPERTIES INTERFACE_LINK_LIBRARIES "${_unityLinkInterfaceLibraries}")
+				if (COTIRE_DEBUG)
+					message (STATUS "unity target ${_unityTargetName} interface link libraries: ${_unityLinkInterfaceLibraries}")
+				endif()
 			endif()
 		endif()
 	endif()