Comment # 1 on bug 1056980 from Andreas Stieger

Supported from 3.1

        * Support for "fat builds" on x86_64 and arm, where the
          implementation of certain functions is selected at run-time
          depending on available cpu features. Configure with
          --enable-fat to try this out. If it turns out to work well
          enough, it will likely be enabled by default in later
          releases.

        * New x86_64 implementation of AES, using the "aesni"
          instructions. Autodetected in fat builds. In non-fat builds,
          it has to be enabled explicitly with --enable-x86-aesni.

https://build.opensuse.org/request/show/520537