error info:
➜ hh (develop-hh) ✔ gem install libv8 -v '3.16.14.11'
Building native extensions. This could take a while...
ERROR: Error installing libv8:
ERROR: Failed to build gem native extension.
current directory: /Users/simonqian/.rvm/gems/ruby-2.2.2/gems/libv8-3.16.14.11/ext/libv8
/Users/simonqian/.rvm/rubies/ruby-2.2.2/bin/ruby -r ./siteconf20170410-48026-19k49a7.rb extconf.rb
creating Makefile