title: Cross compiling hostapd getting fatal error: openssl/bn.h: No such file or directory
body: <p>I am running ubuntu on system &amp; cross-compiling (for arm arch.) hostapd. Hostapd compilation terminates with <code>fatal error: openssl/bn.h: No such file or directory</code> error.</p>
  
  <p><code>bn.h</code> file is already present at <code>/usr/include/openssl/bn.h</code>.
  I tried <code>apt-get install libcurl4-openssl-dev</code> but didn't work.</p>
  
  <p>can someone please point me if i am missing something ?</p>