Q:

Doxygen: how to write log output to file?

I run Doxygen from the console, and get a lot of warnings and error messages for my project. For convenience, I want Doxygen to write this log output to a file. 
How do I specify a file for the log output?

A:

you need to edit the Doxyfile and search for
WARN_LOGFILE           = 
there you add the outputfile e.g. "DoxygenWarningLog.txt" and you are done

