+corrections to the alternative Makefiles themselves. The Unix `configure'
+script and its various requirements are generated by the shell script
+`mkauto.sh', which requires GNU Autoconf, GNU Automake, and Gtk.
+
+Documentation (in various formats including Windows Help and Unix
+`man' pages) is to be built from the Halibut (`.but') files in the
+`doc' subdirectory using `doc/Makefile'. Halibut can be found at
+<http://www.chiark.greenend.org.uk/~sgtatham/halibut/>.