installation on RPi3 with raspbian8-incrediblepbx13 Raspbian (Jessie) Asterisk 13.7.2 + Incredible GUI 12.0.39
fop2-2.31.04-raspberry-arm.tgz
throws errors as follows:

root@raspberrypi3:/usr/src/fop2 $ make install
/bin/sh: 40: [: asterisk: unexpected operator
/bin/sh: 43: [: asterisk: unexpected operator
Done!