the current version of nfs-ganesha we're using doesn't properly handle the kerberos dep.  if it's available, it'll try to use it, and fail.

../../nfs-ganesha-0.0.1/src/MainNFSD/nfs_rpc_callback.c:497: error: undefined reference to 'authgss_ncreate_default'
../../nfs-ganesha-0.0.1/src/MainNFSD/nfs_rpc_dispatcher_thread.c:901: error: undefined reference to 'svcauth_gss_import_name'
../../nfs-ganesha-0.0.1/src/MainNFSD/nfs_rpc_dispatcher_thread.c:913: error: undefined reference to 'svcauth_gss_acquire_cred'
../../nfs-ganesha-0.0.1/src/MainNFSD/nfs_init.c:594: error: undefined reference to 'svcauth_gss_set_svc_name'
../../nfs-ganesha-0.0.1/src/MainNFSD/nfs_init.c:137: error: undefined reference to 'svcauth_gss_release_cred'
clang-4.0: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [MainNFSD/CMakeFiles/ganesha.nfsd.dir/build.make:412: MainNFSD/ganesha.nfsd] Error 1

upstream has fixed this already, but in the 2.5 tree.
https://github.com/nfs-ganesha/nfs-ganesha/commit/3560b9ff05cfd4515444fb0a4d1333ffcab2e435