CMake Error at Optional\.cmake:[0-9]+ \(find_program\):
  find_program cannot be both REQUIRED and OPTIONAL
Call Stack \(most recent call first\):
  CMakeLists\.txt:[0-9]+ \(include\)


CMake Error at Optional\.cmake:[0-9]+ \(find_program\):
  Could not find PROG_AandB using the following names: testAandB
Call Stack \(most recent call first\):
  CMakeLists\.txt:[0-9]+ \(include\)
