env = getenv('TTKERNEL');if isempty(env)  error('Environment variable TTKERNEL not defined - please quit MATLAB and set this variable first.')endccd = pwd;cd(env)  mex ttkernelMATLAB.cppmex ttnetwork.cpp  cd matlab  mex ttInitKernel.cppmex ttCreateTask.cppmex ttCreateJob.cppmex ttCreatePeriodicTask.cppmex ttCreateInterruptHandler.cppmex ttAnalogIn.cppmex ttAnalogOut.cppmex ttCreateEvent.cppmex ttWait.cppmex ttNotifyAll.cppmex ttSetNextSegment.cppmex ttInitNetwork.cppmex ttSendMsg.cppmex ttGetMsg.cppmex ttCurrentTime.cpp  cd(ccd)