Support for the ARM 64 bit CPU architecture (aarch64) was introduced in autoconf 2.69. mercator 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/mercator/mercator-aarch64.patch which updates config.guess and config.sub to recognize aarch64.
Fixed in rawhide. http://koji.fedoraproject.org/koji/taskinfo?taskID=6859338 http://pkgs.fedoraproject.org/cgit/mercator.git/commit/?id=cf80d44f0d530ea341b2a3c6ed31fbd99e80ed3a http://pkgs.fedoraproject.org/cgit/mercator.git/commit/?id=e95c407dfbbc28652fc076ada151eaa6fc9def11