# OAI console logging facilityoai includes a console logging facility that any component should use when writting informational or debugging messages to the softmodem or uesoftmodem stdout stream. By default, this facility is included at build-time and activated at run-time. The T Tracer and the Logging facility share common options for activation:- To disable the logging facility (and T Tracer) at build-time use the *--disable-T-Tracer* switch:```bash/build_oai --disable-T-Tracer```- To use the the T-Tracer instead of the console logging facility, use the command line option *T_stdout*. *T_stdout* is a boolean option, which, when set to 0 (false) disable the console logging facility. All stdout messages are then sent to the T-Tracer.## Documentation*[runtime usage](rtusage.md)