#
# Define ASCIIDOC8 if you want to format documentation with AsciiDoc 8
#
-# Define DOCBOOK_XSL_172 if you want to format man pages with DocBook XSL v1.72.
+# Define DOCBOOK_XSL_172 if you want to format man pages with DocBook XSL v1.72
+# (not v1.73 or v1.71).
+#
+# Define ASCIIDOC_NO_ROFF if your DocBook XSL escapes raw roff directives
+# (versions 1.72 and later and 1.68.1 and earlier).
#
+ # Define GNU_ROFF if your target system uses GNU groff. This forces
+ # apostrophes to be ASCII so that cut&pasting examples to the shell
+ # will work.
+ #
# Define NO_PERL_MAKEMAKER if you cannot use Makefiles generated by perl's
# MakeMaker (e.g. using ActiveState under Cygwin).
#