for the general hit-miss transform can
   be auto-generated from an array of hit-miss Sels.
   When prog/fhmtautogen.c is compiled and run, it generates
   the dwa C code in fhmtgen.1.c and fhmtgenlow.1.c.  These
   files can then be compiled into the libraries or into other programs.
   Results can be checked by comparing dwa and rasterop results;
   e.g., prog/fhmtauto_reg.c

   Several functions with simple parsers are provided to execute a
   sequence of morphological operations (plus binary rank reduct