http_client.h:26:25: error: openssl/ssl.h: No such file or directory

I got this error while installing Skipfish on Centos

http_client.h:26:25: error: openssl/ssl.h:No such file or directory

Solution is to install the following packages
 yum install pcre-devel openssl-devel libidn-devel libidn2-devel