system-mitkrb5 installs:
app-crypt/mit-krb5-1.17-r1::gentoo was built with the following:
USE="keyutils nls pkinit threads -doc -libressl -lmdb -openldap
(-selinux) -test -xinetd" ABI_X86="(64) -32 (-x32)"
CPU_FLAGS_X86="aes"
from https://web.mit.edu/kerberos/www/