Sorry, I don't offer much help here.  You'll need to create a library
with all the stuff in the src and this directory in it. (You don't need
the Amiga or drivers directories).  

Be sure to set things up correctly in plplot.h in the include directory.
Especially the font directory location!

I've written a set of stub routines so that the library can be used
from a Fortan program.  They are not provided, but if you want them
just contact me. I'll galdly give them to you. (These may not work
on all unix systems).