Jansson
From KlavoWiki
The jansson package is required for Asterisk version 12.x.x and onwards.
cd /usr/src wget http://www.digip.org/jansson/releases/jansson-2.9.tar.gz tar xvf jansson-2.9.tar.gz rm -f jansson-2.9.tar.gz cd jansson-2.9 ./configure make make install make check