title: aes encryption ,got error as undefined reference
body: <p>When I use these functions <code>AES_cfb128_encrypt()</code> and  <code>AES_set_encrypt_key()</code> including oepnssl library I got error as </p>
  
  <blockquote>
    <p>undefined reference to AES_cfb128_encrypt() and undefined reference to
    AES_encrypt_key().</p>
  </blockquote>
  
  <p>Please tell me how to fix this error?</p>