look at adns.c.txt which describes the `adns' command provided by
the adns binding.
-Note that the file /usr/lib/chiark_tcl-1.so is NOT an amalgam of all
-of the extensions. It is a set of common routines which will be
+Note that the file /usr/lib/libchiark_tcl-1.so is NOT an amalgam of
+all of the extensions. It is a set of common routines which will be
loaded automatically when required. Each extension must be loaded
explicitly with the Tcl `load' command to bring the additional
commands into the Tcl command namespace.
+
+To use the adns and nettle bindings you need to have the appropriate
+libraries installed too, although these are not listed as
+dependencies. Programs which use these extensions should list
+dependencies on (currently) libadns1 and libnettle2. Regrettably,
+there is no clear way to get the dependencies completely correct in
+the case where chiark-tcl is rebuilt against some other versions of
+adns and/or nettle.