Hi Blaise,

> This isn't directly an answer to your question, but have you
> considered packaging your std::ostringstream work into a function?
> If you do
>
> ROS_DEBUG("My aseba message: %s", aseba_to_str(my_aseba));
>
> then aseba_to_str() will only get called when the logging level is
> set to debug.

This is indeed a good solution, it will do it :-)

Thank you, all the best,

Stéphane

-- 
Dr Stéphane Magnenat
http://stephane.magnenat.net