Error when compile-time testing against RHEL 7.4/7.5 kernels

Issue

• What logic can I use to determine whether or not we are on a RHEL kernel at compile-time?
• When performing compile-time testing, we encounter an issue similar to the following:

error: ‘const struct net_device_ops’ has no member named ‘ndo_change_mtu’; did you mean ‘ndo_change_mtu_rh74’?
    .ndo_change_mtu = ExgChangeMtu,
     ^~~~~~~~~~~~~~
     ndo_change_mtu_rh74