Nagios configure----support

HI
i have install nagios and then installing plugins i got following message dont have any idea please help

configure: See nagiosplugins.org/faq/compile/co … rs_to_hang if this next part takes a long time
checking for redhat spopen problem…

nagiosplugins.org/faq/compile/co … rs_to_hang -------this page is unavailable
please help

Try copiling nagios-plugins with this:
./configure --enable-redhat-pthread-workaround