Just a first version of gr-ieee80211ah
You should have gr-ieee802-11 and gr-foo from https://github.com/bastibl/gr-ieee802-11 https://github.com/bastibl/gr-foo
Find my source code from : https://github.com/zitouni/gr-ieee80211ah.git
TO INSTALL
after git clone cmake . make sudo make install sudo ldconfig