Newbie here. I looked for other similar questions on the site, but still could not solve the problem. I installed Ruby 2.0.0 and RubyGem 2.0.3, but when I try to install Rails 4.0.0, I got:
Building native extensions. This could take a while... ERROR: Error installing rails: ERROR: Failed to build gem native extension. /Users/yuanhunglo/.rvm/rubies/ruby-2.0.0-p0/bin/ruby extconf.rb *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options. Provided configuration options: --with-opt-dir --with-opt-include --without-opt-include=${opt-dir}/include --with-opt-lib --without-opt-lib=${opt-dir}/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=/Users/yuanhunglo/.rvm/rubies/ruby-2.0.0-p0/bin/ruby --with-atomic_reference-dir --without-atomic_reference-dir --with-atomic_reference-include --without-atomic_reference-include=${atomic_reference-dir}/include --with-atomic_reference-lib --without-atomic_reference-lib=${atomic_reference-dir}/ /Users/yuanhunglo/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/2.0.0/mkmf.rb:431:in `try_do': The compiler failed to generate an executable file. (RuntimeError) You have to install development tools first. from /Users/yuanhunglo/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/2.0.0/mkmf.rb:516:in `try_link0' from /Users/yuanhunglo/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/2.0.0/mkmf.rb:814:in `try_run' from extconf.rb:22:in `<main>' Gem files will remain installed in /Users/yuanhunglo/.rvm/gems/ruby-2.0.0-p0/gems/atomic-1.1.10 for inspection. Results logged to /Users/yuanhunglo/.rvm/gems/ruby-2.0.0-p0/gems/atomic-1.1.10/ext/gem_make.out
I tried installing Rails on
gem install rails --version 4.0.0
I'm not sure if something is wrong with the setup or I still need to install something. Thanks in advance for your help.
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