CMake Error at BadSourceExpression3.cmake:2 \(add_library\):
  Error evaluating generator expression:

    \$<TARGET_OBJECTS:NotObjLib>

  Objects of target "NotObjLib" referenced but is not one of the allowed
  target types \(EXECUTABLE, STATIC, SHARED, MODULE, OBJECT\).
Call Stack \(most recent call first\):
  CMakeLists.txt:[0-9]+ \(include\)