Support for the ARM 64 bit CPU architecture (aarch64) was introduced in
autoconf 2.69. mod_gnutls appears to use an earlier version of
autoconf, preventing its being built. This can be fixed in of three ways (In order of preference):
1. Work with upstream to migrate the package to autoconf 2.69.
2. Rerun autoconf or autoreconf in %prep or %build prior to running
3. Apply the patch at http://ausil.fedorapeople.org/aarch64/mod_gnutls/mod_gnutls-aarch64.patch
which updates config.guess and config.sub to recognize aarch64.
autoreconf is called before configure,
created bug: https://sourceforge.net/apps/mantisbt/mod-gnutls/view.php?id=18
mod_gnutls site moved to mod.gnutls.org, new tracker is