NagiosPlugin Installation:-WARNING: Skipping PostgreSQL plug

hello Experts,

I am trying to Install nagios 3.2.1 on Centos 5.3
I have successfully installed core nagios 3.2.1 using “#./configure --with-command-group=nagcmd"
While installing nagios plugin 1.4.14 I get the below warning:
(I use the following command for installing nagios plugin #” ./configure --with-nagios-user=nagios --with-nagios-group=nagios")

configure: WARNING: Skipping PostgreSQL plugin (check_pgsql)
configure: WARNING: LIBS="-lcrypt " CPPFLAGS=""
configure: WARNING: install PostgreSQL libs to compile this plugin (see REQUIREMENTS).
configure: WARNING: Skipping radius plugin
configure: WARNING: install radius libs to compile this plugin (see REQUIREMENTS).
configure: WARNING: Skipping mysql plugin
configure: WARNING: install mysql client libs to compile this plugin (see REQUIREMENTS).
configure: WARNING: Get lmstat from Globetrotter Software to monitor flexlm licenses
configure: WARNING: Get snmpget from net-snmp.sourceforge.net to make check_hpjd and check_snmp plugins
configure: WARNING: Tried /usr/bin/perl - install Net::SNMP perl module if you want to use the perl snmp plugins
configure: WARNING: Get qstat from activesw.com/people/steve/qstat.html in order to make check_game plugin
configure: WARNING: Get fping from fping.com in order to make check_fping plugin
configure: WARNING: Could not find qmail-qstat or eqivalent

Please help me resolve this issue.
I even tried to google the particular plugins, but I did not find any.

they are warnings, if you don’t need those plugins there’s no problem at all.