Before I was using Ubuntu and to enable the RPKI protocol I did:

./configure --enable-libssh.

Now I am a new Centos7 user and I don't know really well how to enable RPKI. 

I downloaded bird2-2.0.6-1.el7.x86_64.rpm and then:

yum install bird2-2.0.6-1.el7.x86_64.rpm

But now how do I enable RPKI?

Thanks in advance,

Fabiano