If you run arduino-builder from command-line with -logger=machine parameter it prints nice progress information on stdout in form:
===info ||| Progress {0} ||| [NN.NN]
If you run arduino_debug (which is calling the arduino-builder with the same -logger=machine param) the information about the progress is not presented.
How to "force" arduino_debug to present this information? If this is not possible, how can I get this progress information other way?