title: Error installing sassc, clang compiler does not support '-march=native', M1
body: <p>Using Apple Silicon M1 machine. Attempting to install ruby gem <code>gem install sassc -v '2.1.0'</code>.</p>
  <p>The problem is that clang compiler does not have flag 'native' for Apple M1 yet. <a href="https://stackoverflow.com/questions/65966969/why-does-march-native-not-work-on-apple-m1">Related</a></p>
  <p>Error given: (note I replaced my name with 'yournamehere')</p>
  <pre><code>Fetching sassc 2.1.0
  Installing sassc 2.1.0 with native extensions
  Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
  
      current directory: /Users/yournamehere/.asdf/installs/ruby/2.7.2/lib/ruby/gems/2.7.0/gems/sassc-2.1.0/ext
  /Users/yournamehere/.asdf/installs/ruby/2.7.2/bin/ruby -I /Users/yournamehere/.asdf/installs/ruby/2.7.2/lib/ruby/2.7.0 -r ./siteconf20210303-14183-1uwhwj4.rb extconf.rb
  creating Makefile
  
  current directory: /Users/yournamehere/.asdf/installs/ruby/2.7.2/lib/ruby/gems/2.7.0/gems/sassc-2.1.0/ext
  make &quot;DESTDIR=&quot; clean
  
  current directory: /Users/yournamehere/.asdf/installs/ruby/2.7.2/lib/ruby/gems/2.7.0/gems/sassc-2.1.0/ext
  make &quot;DESTDIR=&quot;
  compiling ./libsass/src/units.cpp
  clang: error: the clang compiler does not support '-march=native'
  make: *** [units.o] Error 1
  
  make failed, exit code 2
  
  Gem files will remain installed in /Users/yournamehere/.asdf/installs/ruby/2.7.2/lib/ruby/gems/2.7.0/gems/sassc-2.1.0 for inspection.
  Results logged to /Users/yournamehere/.asdf/installs/ruby/2.7.2/lib/ruby/gems/2.7.0/extensions/arm64-darwin-20/2.7.0/sassc-2.1.0/gem_make.out
  
  An error occurred while installing sassc (2.1.0), and Bundler cannot continue.
  Make sure that `gem install sassc -v '2.1.0' --source 'https://rubygems.org/'` succeeds before bundling.
  
  In Gemfile:
    sassc-rails was resolved to 2.1.2, which depends on
      sassc
  </code></pre>