Description:

pdnsd is a proxy DNS daemon with permanent (disk-)cache and the ability
to serve local records. It is designed to detect network outages or hangups
and to prevent DNS-dependent applications like Netscape Navigator from hanging.

This is a customized version with modifications made by Paul A. Rombouts.
For a description of the changes see http://www.phys.uu.nl/~rombouts/pdnsd.html
and the file README.par in /usr/share/doc/pdnsd-1.2.4.par

Source rpm support those options (--without options to disable):

--with ntpl (activate): use the Native POSIX Thread Library (NPTL);
--with isdn : enable isdn support;
--with ipv6 (activate): enable ipv6 support;
--with poll : use the select(2) function instead of poll(2);
--with underscores : built with underscores enabled;
--with tcp_queries .