The logging utilities provided by BitBake are very useful to trace the code execution path. BitBake provides logging functions for use in Python and Shell Script code, as described:
Python: For use within Python functions, BitBake supports several log levels, which are
bb.fatal,bb.error,bb.warn,bb.note,bb.plain, andbb.debugShell Script: For use in Shell Script functions, the same set of log levels exists and is accessed with a similar syntax:
bbfatal,bberror,bbwarn,bbnote,bbplain, andbbdebug
These logging functions are very similar to each other but have inner differences as described:
bb.fatalandbbfatal: These have the highest priority of logging messages as they print the message and terminate the processing. They cause the build to be interrupted.bb.errorandbberror: They are used to display an error but do not force the build to stop.bb.warnandbbwarn: They are used to warn users about something.