asciidoc requirement for man pages ?

[Frédéric L. W. Meunier]

After compiling all 7.5 libraries, I noticed that in the man3 
directory there were old man pages. All belonged to libXi 
1.2.1.

When you compile 1.3 (from tarballs, not git), do you need xmlto 
AND asciidoc to install the man pages ?

I have xmlto, but not asciidoc, and configure returned

checking for xmlto... /usr/local/bin/xmlto
checking for asciidoc... no
configure: WARNING: xmlto or asciidoc not found - cannot create man pages without it

"xmlto or asciidoc"

And are all man pages moving to it in the near future, or it's 
just libXi ?