CMake Error at BadOR.cmake:1 \(add_custom_target\):
  Error evaluating generator expression:

    \$<OR:>

  OR requires one or more comma-separated '0' or '1' values.
Call Stack \(most recent call first\):
  CMakeLists.txt:3 \(include\)
+
CMake Error at BadOR.cmake:1 \(add_custom_target\):
  Error evaluating generator expression:

    \$<OR:,>

  OR requires one or more comma-separated '0' or '1' values.
Call Stack \(most recent call first\):
  CMakeLists.txt:3 \(include\)$