title: Error occurred while installing mini_racer (0.2.0)
body: <p>I am using mac 10.14. I have some problem with mini_racer gem. After run bundle install the below error occurs. I don't know how can I solve this.</p>
  
  <p><strong>Error</strong> </p>
  
  <pre><code>Installing mini_racer 0.2.0 with native extensions
  Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
  
  current directory:
  /Users/vipinkumar/.rvm/gems/ruby-2.5.1@ry_rails5/gems/mini_racer-0.2.0/ext/mini_racer_extension
  /Users/vipinkumar/.rvm/rubies/ruby-2.5.1/bin/ruby -r
  ./siteconf20180911-791-fpmt3t.rb extconf.rb
  checking for -lpthread... yes
  checking for -lobjc... yes
  creating Makefile
  
  current directory:
  /Users/vipinkumar/.rvm/gems/ruby-2.5.1@ry_rails5/gems/mini_racer-0.2.0/ext/mini_racer_extension
  make "DESTDIR=" clean
  
  current directory:
  /Users/vipinkumar/.rvm/gems/ruby-2.5.1@ry_rails5/gems/mini_racer-0.2.0/ext/mini_racer_extension
  make "DESTDIR="
  compiling mini_racer_extension.cc
  clang: warning: argument unused during compilation: '-rdynamic'
  [-Wunused-command-line-argument]
  In file included from mini_racer_extension.cc:2:
  In file included from
  /Users/vipinkumar/.rvm/rubies/ruby-2.5.1/include/ruby-2.5.0/ruby.h:33:
  In file included from
  /Users/vipinkumar/.rvm/rubies/ruby-2.5.1/include/ruby-2.5.0/ruby/ruby.h:2040:
  /Users/vipinkumar/.rvm/rubies/ruby-2.5.1/include/ruby-2.5.0/ruby/intern.h:47:19:
  warning: 'register' storage class specifier is deprecated and incompatible with
  C++17 [-Wdeprecated-register]
  void rb_mem_clear(register VALUE*, register long);
                    ^~~~~~~~~
  /Users/vipinkumar/.rvm/rubies/ruby-2.5.1/include/ruby-2.5.0/ruby/intern.h:47:36:
  warning: 'register' storage class specifier is deprecated and incompatible with
  C++17 [-Wdeprecated-register]
  void rb_mem_clear(register VALUE*, register long);
                                     ^~~~~~~~~
  2 warnings generated.
  linking shared-object mini_racer_extension.bundle
  clang: warning: libstdc++ is deprecated; move to libc++ [-Wdeprecated]
  ld: library not found for -lstdc++
  clang: error: linker command failed with exit code 1 (use -v to see invocation)
  make: *** [mini_racer_extension.bundle] Error 1
  
  make failed, exit code 2
  
  Gem files will remain installed in
  /Users/vipinkumar/.rvm/gems/ruby-2.5.1@ry_rails5/gems/mini_racer-0.2.0 for
  inspection.
  Results logged to
  /Users/vipinkumar/.rvm/gems/ruby-2.5.1@ry_rails5/extensions/x86_64-darwin-18/2.5.0/mini_racer-0.2.0/gem_make.out
  
  An error occurred while installing mini_racer (0.2.0), and Bundler
  cannot continue.
  Make sure that `gem install mini_racer -v '0.2.0' --source
  'https://rubygems.org/'` succeeds before bundling.
  
  In Gemfile:
    mini_racer
  </code></pre>
  
  <p>Ruby version 2.5.0 or 2.5.1 and rails 5.0</p>
  
  <p><strong>GemFile</strong> </p>
  
  <pre><code>gem 'mini_racer', platforms: :ruby
  </code></pre>