compilation failure

root@sigma:~# gcc -o ssltest Opal/src/SSL.c -lssl -lcrypto >> error
Opal/src/SSL.c: In function 'main':
Opal/src/SSL.c:54:8: error: 'ctx' undeclared (first use in this function)
 if ( ( ctx = SSL_CTX_new(method)) == NULL)
        ^
Opal/src/SSL.c:54:8: note: each undeclared identifier is reported only once for each function it appears in
In file included from Opal/src/SSL.c:8:0:
Opal/src/SSL.c:59:26: error: 'SSL_OP_NOSSLv2' undeclared (first use in this function)
 SSL_CTX_set_options(ctx, SSL_OP_NOSSLv2);
                          ^