> > 3.  The probelm with groff not building [...]
> 
> what problem is this?
> 
> if it's a problem with include files, make sure the g++ include files are
> up-to-date and don't include any deprecated files.

It was a problem with old include files that were installed and never
removed once they were deprecated.  What I had to do was

# rm -rf /usr/include/g++
# cd /usr/src/gnu/lib/libg++
# make all install
# cd /usr/src/gnu/usr.bin/groff
# make

and all worked just fine again.
Thanks for the hint, Chris.

- Havard

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