The configure script in blitz does nor support ARM aarch64 architecture. The support for this architecture was added to autoconf 2.69, whereas blitz's configure was created with autoconf 2.68. Please recreate configure with autoconf >= 2.69
https://bugzilla.redhat.com/show_bug.cgi?id=925103
moved here: https://github.com/blitzpp/blitz/issues/78