Describe DOCBOOK_XSL_172, ASCIIDOC_NO_ROFF options in Makefile

There is excellent documentation for these options in
Documentation/Makefile, but some users may never find it.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Makefile b/Makefile
index 629ab35047ead2b31e663ec21bd1f6baaf8a98dc..fea237bc80978c1011793ee0cbd8398b2e9f773b 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -153,7 +153,11 @@ all::
 #
 # 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 NO_PERL_MAKEMAKER if you cannot use Makefiles generated by perl's
 # MakeMaker (e.g. using ActiveState under Cygwin).