I'm using GNU Emacs 188.8.131.52 (x86_64-unknown-linux-gnu, GTK+ Version 3.22.5) of 2016-12-20, with arch linux (antergos), I want to start with the option tcp server, so I added and assigment to the variable server-use-tcp,
(setq server-use-tcp t)
and I get this warning:
In toplevel form: init.el:15:7:Warning: assignment to free variable ‘server-use-tcp’
Is this variable deleted?, or is the wrong way to this? or what library I need to require before setting that variable?