These are the  Header  files for the ``R machine''

There are 2 kinds:

     i) Those only used for R internally, e.g.,  Defn.h  declarations

    ii) Those declaring things generally useful in the ``R API'',
	i.e., declaring code that can be used in
	R packages or user code which will be  dyn.load()ed into R.

	The declarations from "ii)" will be moved to  $(RHOME)/include/
	and be available with, e.g., ``R COMPILE''.
	These are listed as "SRC_HEADERS" in ./Makefile.
			     ~~~~~~~~~~~



-------------------------------------------------------------------
         NESTING Hierarchy
-------------------------------------------------------------------

i)

Graphics.h
	-> Defn.h	-> .......

IOStuff.h
	-> Defn.h	-> .......

Print.h
	-> PrtUtil.h 	-> Complex.h
	-> Defn.h	-> .......

Defn.h
	-> Arith.h	-> Platform.h
	-> Complex.h
	-> Errormsg.h	-> Error.h
	-> Memory.h
	-> PrtUtil.h 	-> Complex.h
	-> Utils.h 	-> Complex.h

    -------------

ii)

Mathlib.h
	-> Arith.h	-> Platform.h

S_compat.h
	-> S.h		-> Platform.h , Error.h , Memory.h
	-> Linpack.h	-> Blas.h ,	Platform.h

S.h
	-> Platform.h
	-> Error.h
	-> Memory.h

Applic.h
	-> Platform.h

Arith.h
	-> Platform.h

Fortran.h
	-> Platform.h
	-> Complex.h

Linpack.h
	-> Platform.h
	-> Blas.h

PrtUtil.h
	-> Complex.h

Errormsg.h
	-> Error.h

Utils.h
 	-> Complex.h