tions of the sized deallocation
  functions, either by providing them explicitly or by using a C++ standard library
  that does. <code>libstdc++</code> added these functions in version 5.0, and
  <code>libc++</code> added them in version 3.7. The user can also use the
  <code>-fno-sized-deallocation</code> option to disable sized deallocation.
</span>
</p>
</details>

<h2 id="cxx11">C++11 implementation status</h2>

<p>Clang 3.3 and later implement all of the <a
  href="https://www.iso.org/standard/50372.ht