CMake Error at BadIF\.cmake:2 \(add_custom_target\):
  Error evaluating generator expression:

    \$<IF:asdf,a,b>

  First parameter to \$<IF> must resolve to exactly one '0' or '1' value\.
Call Stack \(most recent call first\):
  CMakeLists\.txt:[0-9]+ \(include\)
+
CMake Error at BadIF\.cmake:2 \(add_custom_target\):
  Error evaluating generator expression:

    \$<IF:asdf,a>

  \$<IF> expression requires 3 comma separated parameters, but got 2 instead\.
