CMake Error at OutputNameMatchesObjects\.cmake:[0-9]+ \(file\):
  Error evaluating generator expression:

    \$<TARGET_OBJECTS:foo>

  Objects of target "foo" 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]+ \(include\)