If you statically link, it doesn't matter what version of glibc is on the target machine, because it's not used.
> Static linking of glibc is not supported on Red Hat Enterprise Linux.
https://developers.redhat.com/blog/2016/02/17/upgrading-the-...
:/tmp$ file ffmbc
ffmbc: ELF 64-bit LSB executable, x86-64, version 1 (SYSV),
statically linked, for GNU/Linux 2.6.15, BuildID[sha1]=...., stripped
:/tmp$ ldd ffmbc
not a dynamic executable
It runs on the following libc versions: ldd (GNU libc) 2.12 (Centos 6.9)
ldd (Ubuntu EGLIBC 2.19-0ubuntu6.14) 2.19 (ubuntu 14.04)
ldd (Ubuntu GLIBC 2.23-0ubuntu10) 2.23 (Ubuntu 16.04)
I'm fairly sure it ran on distributions as old as ubuntu 8.04