Hello. There are couple of pending patches: https://gcc.gnu.org/ml/gcc-patches/2017-04/msg01478.html
Using the patches, we can generate following Doxygen 'documentation': https://drive.google.com/open?id=0B0pisUJ80pO1dmhldmo3R3JHLWc I'm planning to periodically build it and rsync to a public website. I guess, sometimes it can be handy. Martin