CMake Error at no-fileset\.cmake:[0-9]+ \(file\):
  Error evaluating generator expression:

    \$<FILE_SET_EXISTS:,TARGET:tgt>

  \$<FILE_SET_EXISTS:fileset,TARGET:tgt> expression requires a non-empty
  FILE_SET name.
Call Stack \(most recent call first\):
  CMakeLists\.txt:[0-9]+ \(include\)
