How can logging-levels be set for eckit/log/log.h?

[jonasjucker]

I am a user of infero. Infero uses #include "eckit/log/Log.h" for its logging.
Unfortunately I could not find a way to descrease verbosity of that logging-instance therefore the logfiles contain a lot of noise.
Browsing through the files in log did not reveal any possibility to set a specific log-level.

My question:

How can I set the logger provided by eckit to a certain level? I.e level warning or level debug?