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[openssl-gost] [gost-engine/engine] d2810d: Provide cmake test if alignment requirement is strict

  Branch: refs/heads/master
  Home:   https://github.com/gost-engine/engine
  Commit: d2810d23a9f30ae885f9bf0783f0847a12972ff3
      https://github.com/gost-engine/engine/commit/d2810d23a9f30ae885f9bf0783f0847a12972ff3
  Author: Vitaly Chikunov <vt@altlinux.org>
  Date:   2020-09-18 (Fri, 18 Sep 2020)

  Changed paths:
    M CMakeLists.txt

  Log Message:
  -----------
  Provide cmake test if alignment requirement is strict

This is based on AX_CHECK_ALIGNED_ACCESS_REQUIRED from autoconf-archive.

Note, that on some arches unaligned access behavior could be changed at
runtime via prctl(1). Also, unaligned memory access is still slower (and
very slow on some arches) even if it's not strictly required.