Support for the ARM 64 bit CPU architecture (aarch64) was introduced in autoconf 2.69. vile 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 configure. 3. Apply the patch at http://ausil.fedorapeople.org/aarch64/vile/vile-aarch64.patch which updates config.guess and config.sub to recognize aarch64.
Dennis, It looks like upstream has added aarch64 in the 4.8j release, see #952209 for that build. The conig.guess and config.sub include the stuff in your patch and a little more. I'm going to close this for now, if there are problems in the next rebuild for aarch64, please re-open it.