Red Hat Enterprise Linux Server release 6.6 (Santiago)
Linux version 2.6.32-696.20.1.el6.x86_64
(mockbuild@x86-042.build.eng.bos.redhat.com)
(gcc version 4.4.7 20120313 (Red Hat 4.4.7-18) (GCC) ) #1 SMP Fri Jan 12 15:07:59 EST 2018

/usr/lib64/libstdc++.so.6: version `GLIBCXX_3.4.20' not found (required by...

libstdc++-4.9.x, which is compiled with glibc-2.14