Hi Folks, I am trying to install nagios-3.0.6 on Centos 5. while compiling cgis i am getting following error and i couldn't able to proceed further I have installed all possible dependency packages for the please help me skiplist.o objects-cgi.o xobjects-cgi.o statusdata-cgi.o xstatusdata-cgi.o comments-cgi.o downtime-cgi.o -L/lib -lglib-2.0 gcc -g -O2 -DHAVE_CONFIG_H -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -DNSCGI -o history.cgi history.c getcgi.o cgiutils.o cgiauth.o macros-cgi.o skiplist.o objects-cgi.o xobjects-cgi.o statusdata-cgi.o xstatusdata-cgi.o comments-cgi.o downtime-cgi.o -L/lib -lglib-2.0 gcc -g -O2 -DHAVE_CONFIG_H -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -DNSCGI -o histogram.cgi histogram.c getcgi.o cgiutils.o cgiauth.o macros-cgi.o skiplist.o objects-cgi.o xobjects-cgi.o statusdata-cgi.o xstatusdata-cgi.o comments-cgi.o downtime-cgi.o -L/lib -lglib-2.0 /tmp/ccCq2F9D.o: In function `draw_dashed_line': /opt/nagios-3.0.6/nagios-3.0.6/cgi/histogram.c:2474: undefined reference to `gdImageSetStyle' /opt/nagios-3.0.6/nagios-3.0.6/cgi/histogram.c:2477: undefined reference to `gdImageLine' /tmp/ccCq2F9D.o: In function `draw_line': /opt/nagios-3.0.6/nagios-3.0.6/cgi/histogram.c:2453: undefined reference to `gdImageSetStyle' /opt/nagios-3.0.6/nagios-3.0.6/cgi/histogram.c:2456: undefined reference to `gdImageLine' /tmp/ccCq2F9D.o: In function `graph_all_histogram_data': /opt/nagios-3.0.6/nagios-3.0.6/cgi/histogram.c:1619: undefined reference to `gdFontSmall' /opt/nagios-3.0.6/nagios-3.0.6/cgi/histogram.c:1652: undefined reference to `gdFontSmall' /opt/nagios-3.0.6/nagios-3.0.6/cgi/histogram.c:1653: undefined reference to `gdImageString' /opt/nagios-3.0.6/nagios-3.0.6/cgi/histogram.c:1673: undefined reference to `gdFontSmall' /opt/nagios-3.0.6/nagios-3.0.6/cgi/histogram.c:1675: undefined reference to `gdImageStringUp' /opt/nagios-3.0.6/nagios-3.0.6/cgi/histogram.c:1681: undefined reference to `gdFontSmall' /opt/nagios-3.0.6/nagios-3.0.6/cgi/histogram.c:1682: undefined reference to `gdImageStringUp' /opt/nagios-3.0.6/nagios-3.0.6/cgi/histogram.c:1694: undefined reference to `gdFontSmall' Please let me if you need any more info on this. Thanks -- Saravana Kumar