I want to build htmlhelp manual for Windows with Cygwin. This is the easiest way to create "native" manual for Windows users.
Latest update to Cygwin made possible to build HTML manual also in the Cygwin. Requires latest version 4.5 of DocBook XML.
Add XMLTO macro to build Docbook manual using xmlto program. xmlto is not available in Windows so limit building to Linux. Adds new target "html" to build which is not run automatically.