# OAI console logging facility oai 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, use the command line option *T_stdout*. When set to 0, it disables the console logging facility. All stdout messages are then sent to the T-Tracer. When set to 1 (the default), the logs are output to the linux console and no T trace is generated. When set to 2 both console logging and T traces are activated. ## Documentation * [runtime usage](rtusage.md) * [developer usage](devusage.md) * [module architecture](arch.md) [oai Wikis home](https://gitlab.eurecom.fr/oai/openairinterface5g/wikis/home)