^CMake Error at UNKNOWNwithNoSourcesButLinkObjects.cmake:[0-9]+ \(target_link_libraries\):
  Cannot specify link libraries for target \"TestUnknownLibWithoutSources\"
  which is not built by this project.
Call Stack \(most recent call first\):
  CMakeLists.txt:[0-9]+ \(include\)$
