[dev] Support for linux 4.9 LTSI

Dear members, I am not able to install Frr on Linux 4.9 LTSI , Angstrom distribution I am trying to install from source downloaded from git . There are various issues ,Frr dependencies Libyang Cmake Are the major once when I am trying to install . Please guide me with proper versions of dependencies required to install Frr on my platform mentioned above . Guide me with the dependencies versions and other link support . Regards PJ