To make troff (actually a.out): 	make You will also need to write a driver for your favorite output device.d202.c provides a model, although it is specialized to a machine noone has.  There are also a variety of postscript drivers that are thebest thing to use if you have a postscript device. You will also have to make a DESC file for your typesetter and somefont description files; see dev202 for examples.  These describe thenamed characters, widths, kerning information, and output codes. Nroff is the same program as troff, so you should 	cp a.out /usr/bin/troff	ln /usr/bin/troff /usr/bin/nroff or the equivalent. You will also need terminal description files for your terminals; seetab.37, tab.450 and tab.lp for examples. Troff uses files that are normally stored in /usr/lib/font;macro packages are in /usr/lib/tmac; and nroff tables are in/usr/lib/term.  You can edit tdef.h to change these assumptions. There have been a few features since the last version, and a number ofsignificant internal changes.  Not all are improvements, of course.Most of the more recent changes, including bug fixes, are in FIXES,which you should read also.