OS:redhat 5.6

nginx version=nginx-0.8.54

getting following error

checking for OpenSSL library ... not found

./configure: error: SSL modules require the OpenSSL library.
You can either do not enable the modules, or install the OpenSSL library
into the system, or build the OpenSSL library statically from the source
with nginx by using --with-openssl=<path> option.

openssl is installed
-bash-3.2# which openssl
/usr/bin/openssl

openssl-devel is as well

which lib is it looking forward?