> I tried to let groff create a data directory for the `refer'
> databases. I changed aclocal.m4, Makefile.in, and configure.ac.
*Never* change `aclocal.m4' manually! This is a generated file. The
source files for `aclocal.m4' are in the `m4' directory (well, not all
of them, but the ones specific to groff).
> Unfortunately, the `refer' data directory is not created by `make
> install'. I did such creations already several times, but I lost
> the knowledge how that worked.
You have to add a macro in `m4/groff.m4' to do that,
cf. `GROFF_GROGDIR_DEFAULT'.
Werner