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

    \$<OR>

  \$<OR> expression requires at least one parameter.
Call Stack \(most recent call first\):
  CMakeLists.txt:3 \(include\)
+
CMake Error at BadOR.cmake:1 \(add_custom_target\):
  Error evaluating generator expression:

    \$<OR:>

  Parameters to \$<OR> must resolve to either '0' or '1'.
Call Stack \(most recent call first\):
  CMakeLists.txt:3 \(include\)
+
CMake Error at BadOR.cmake:1 \(add_custom_target\):
  Error evaluating generator expression:

    \$<OR:,>

  Parameters to \$<OR> must resolve to either '0' or '1'.
Call Stack \(most recent call first\):
  CMakeLists.txt:3 \(include\)
+
CMake Error at BadOR.cmake:1 \(add_custom_target\):
  Error evaluating generator expression:

    \$<OR:01>

  Parameters to \$<OR> must resolve to either '0' or '1'.
Call Stack \(most recent call first\):
  CMakeLists.txt:3 \(include\)
+
CMake Error at BadOR.cmake:1 \(add_custom_target\):
  Error evaluating generator expression:

    \$<OR:nothing>

  Parameters to \$<OR> must resolve to either '0' or '1'.
Call Stack \(most recent call first\):
  CMakeLists.txt:3 \(include\)
+
CMake Error at BadOR.cmake:1 \(add_custom_target\):
  Error evaluating generator expression:

    \$<OR:0,nothing>

  Parameters to \$<OR> must resolve to either '0' or '1'.
Call Stack \(most recent call first\):
  CMakeLists.txt:3 \(include\)$
