An exe file is OS specific. In order to build an exe for Linux, you would need LabVIEW for Linux and the application builder for that. I don't know of a specific list of Windows only functions. If you check the on-line help for specific functions, it should tell you if it's available only on Windows. Some of the functions include ActiveX. The timed loop is Windows only. If you're using DAQ, I believe DAQmx is only for Windows. For Linux, you have to use DAQmx base. There's toolkits that are Windows only. This would include the Database Connectivity and Report Generation toolkits.