INSTALL: Document the optional documentation tools

diff --git a/INSTALL b/INSTALL
index 2a4d2e1244a46fc0999bf14f717758df7c43e4c1..93c0364a1675fe0db800bbab3c2ac36ba63dacbe 100644 (file)
--- a/INSTALL
+++ b/INSTALL
@@ -31,5 +31,15 @@ ncurses                              Be sure to also have development files \
 iconv                          If iconv is not provided by the c library \
                                you need to change the Makefile to link it \
                                into the binary.
-asciidoc (>= 7.0), xmlto       For building documentation. (Optional)
+-------------------------------------------------------------------------------
+
+The following optional tools and packages are needed for building
+documentation:
+
+`-------------------------------`----------------------------------------------
+asciidoc (>= 8.0)              Generates HTML and (DocBook) XML from text.
+xmlto                          Generates manpages and chunked HTML from XML.
+DocBook XSL (>= 1.72.0)                Used by xmlto for building manpages.
+DocBook (DSSL/Jade) tools      Generates PDF from XML. \
+                               Also known as docbook-utils.
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