This is /usr/miro/src/lib/structures. It contains source
code for the structures.a library, which is used to build data
structures for the arrows, boxes, box relations, and sysnames of a
Miro picture. The current contents are:

  Listing		0-length file used to keep track of last time
			  printouts were done so only changed files
			  are printed when we do "make -N Listing"
  Makefile		self-explanatory
  arrow.c		module for arrow data structures
  box-relations.c	module for box relation data structures
  box.c			module for box data structures
  egrep[12].txt		egrep files to clean lint output
  sysname-hash.c	module for sysnames
