编译安装出现缺少OpenSSL

缺少ssl错误，错误信息如下：
./configure: error: the HTTP cache module requires md5 functions
from OpenSSL library. You can either disable the module by using
--without-http-cache option, or install the OpenSSL library into the system,
or build the OpenSSL library statically from the source with nginx by using
--with-http_ssl_module --with-openssl=<path> options.
解决方法：安装openssl
yum -y install openssl openssl-devel