[gr-gsm] installation issue

Hello, I would like to install gr-gsm but I have some problems. I give you some information about the installation tries: 1. OS Ubuntu 14.04 2. version of gnuradio : 3.6.5.1 (the one compatible with Ubuntu 14, do you propose another version?) 3. I follow the instructions on https://osmocom.org/projects/gr-gsm/wiki/Installation. I used two methods * for ubuntu 16 (?) but during the build I have a fatal error: "fatal error : gnuradio/attributes.h not found" in api.h there is a header file named "attributes.h" in my gnuradio installation, maybe I should "connect it" in the file? * I tried with Pybombs, but it's so difficult and I obtained many dependencies problems 1. I installed libosmocore from the source Thanks you for your help Best regards, MG