Make - What is Efl?

[Doug Gwyn]

Oops!  Donn Seeley has pointed out to me that "efl"
directly produces Fortran and is not interfaced directly
to the code generator.  My mistake.  

Otherwise the description was okay, with the addendum
that some people trying to port "efl" have found it
hard to do.  I don't quite understand this, since I
ported it to the Gould PowerNode series easily enough;
perhaps the Berkeley version is harder to port than
the System V version, or something like that.