title: pjproject => aconfigure: error: unable to use SRTP
body: <p>Hello I'm currently trying to build WebRTC on Asterisk, so far i've been following this site (<a href="http://www.nethram.com/webrtc-with-asterisk-12/" rel="nofollow">http://www.nethram.com/webrtc-with-asterisk-12/</a>) and get "aconfigure: error: unable to use SRTP" after running ./configure pjproject.
  It gives me this notification about SRTP (since I configure it with "--with-external-srtp")</p>
  
  <p>the error message (the others are working fine)==>
  checking if external SRTP devkit is installed... aconfigure: error: Unable to use SRTP. If SRTP development files are not available in the default locations, use CFLAGS and LDFLAGS env var to set the include/lib paths</p>
  
  <p>Can anybody help? Thank you very much</p>