JSBSim not compiling

I’m trying to run ArduPlane in SITL on a native debian based Linux system (Ubuntu 16.04LTS)
I followed the tutorial in http://ardupilot.org/dev/docs/setting-up-s$
However the JSBSim is not compiling, with the error message:
Error: You must have `libtool’ installed to compile jsbsim.

autoconf, automake, libtool and libexpat1-dev are already latest:
autoconf is already the newest version (2.69-9).
automake is already the newest version (1:1.15-4ubuntu1).
libtool is already the newest version (2.4.6-0.1).
libexpat1-dev is already the newest version (2.1.0-7ubuntu0.16.04.2).

So what to change to compile JSBSIM ?

SOLVED:
add sudo apt-get install libtool-bin

I see this is now also changed in the “setting up linux” tutorial

So what to change to compile JSBSIM ?

sudo apt-get install -y libtool-bin