When we try to install nginx-1.2.4 and check with. /configure then two problems come as fallows:
+ OpenSSL library is not used
+ sha1 library is not found

And then we check openssl installed or not then result come:-

rpm -qa openssl
openssl-0.9.8e-22.el5_8.4
openssl-0.9.8e-22.el5_8.4

Please advise; what is the solution? as we are not interested to face any problem after installation of nginx-1.2.4

Complete . /configure result as fallows:-
Configuration summary
+ using system PCRE library
+ OpenSSL library is not used
+ using builtin md5 code
+ sha1 library is not found
+ using system zlib library

nginx path prefix: "/usr/local/nginx"
nginx binary file: "/usr/local/nginx/sbin/nginx"
nginx configuration prefix: "/usr/local/nginx/conf"
nginx configuration file: "/usr/local/nginx/conf/nginx.conf"
nginx pid file: "/usr/local/nginx/logs/nginx.pid"
nginx error log file: "/usr/local/nginx/logs/error.log"
nginx http access log file: "/usr/local/nginx/logs/access.log"
nginx http client request body temporary files: "client_body_temp"
nginx http proxy temporary files: "proxy_temp"
nginx http fastcgi temporary files: "fastcgi_temp"
nginx http uwsgi temporary files: "uwsgi_temp"
nginx http scgi temporary files: "scgi_temp"