In order to compile and install KTalkd on your system, type the following in the base folder of the KTalkd distribution:

% ./configure
% make 
% make install

As KTalkd is a daemon, make install will require root privileges.

Don't forget to update /etc/inetd.conf. For example, on a Linux® system, if KDE is in /opt/kde, change the lines concerning talk and ntalk to:

talk   dgram   udp     wait    root    /usr/sbin/tcpd  /opt/kde/bin/ktalkd
ntalk  dgram   udp     wait    root    /usr/sbin/tcpd  /opt/kde/bin/ktalkd

A script is provided, to make the necessary change automatically. Update your inetd.conf file just by running

% ./post-install.sh

Anyway, you'll have to restart inetd after this. On most Linux® systems, do:

% killall -HUP inetd

On newer systems, using xinetd, there is no more /etc/inetd.conf, and you should edit or create /etc/xinetd.d/talk instead, with those lines:

service talk
{
	socket_type = dgram
	wait = yes
	user = root
	server = /usr/bin/ktalkd
}

service ntalk
{
	socket_type = dgram
	wait = yes
	user = root
	server = /usr/bin/ktalkd
}

then restart xinetd.

Please inform me of any modification you had to undertake in order to get KTalkd to compile or work on your platform.