title: Why does march=native not work on Apple M1?
body: <p>Whenever I try to compile any C++ program with <code>march=native</code> on a Macbook with a M1 chip, I get the following error when using clang:</p>
  <pre><code>clang: error: the clang compiler does not support '-march=native'
  </code></pre>
  <p>However, it used to work on an older Macbook with an Intel CPU. Does clang not support this architecture (yet)?</p>
  <p><code>clang --version</code> gives:</p>
  <pre><code>Apple clang version 12.0.0 (clang-1200.0.32.29)
  Target: arm64-apple-darwin20.2.0
  </code></pre>