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POMountain Lion, failed to install ruby on rails [ERROR: Failed to build gem native extension.]
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  1. POMountain Lion, failed to install ruby on rails [ERROR: Failed to build gem native extension.]
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    copied!<p>I have tried different ways to install rails but never get it.. every time I type "gem install rails".. it shows me <code>"ERROR: Failed to build gem native extension."</code> </p> <pre><code>miketeki-iphone:~ Simon$ gem install rails Failed to load /Users/Simon/.gemrc because it doesn't contain valid YAML hash Fetching: i18n-0.6.5.gem (100%) Successfully installed i18n-0.6.5 Fetching: multi_json-1.7.9.gem (100%) Successfully installed multi_json-1.7.9 Fetching: tzinfo-0.3.37.gem (100%) Successfully installed tzinfo-0.3.37 Fetching: minitest-4.7.5.gem (100%) Successfully installed minitest-4.7.5 Fetching: atomic-1.1.13.gem (100%) Building native extensions. This could take a while... ERROR: Error installing rails: ERROR: Failed to build gem native extension. /Users/Simon/.rvm/rubies/ruby-2.0.0-p247/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 --without-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/Simon/.rvm/rubies/ruby-2.0.0-p247/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/Simon/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/mkmf.rb:434:in `try_do': The compiler failed to generate an executable file. (RuntimeError) You have to install development tools first. from /Users/Simon/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/mkmf.rb:519:in `try_link0' from /Users/Simon/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/mkmf.rb:817:in `try_run' from extconf.rb:24:in `&lt;main&gt;' Gem files will remain installed in /Users/Simon/.rvm/gems/ruby-2.0.0-p247@global/gems/atomic-1.1.13 for inspection. Results logged to /Users/Simon/.rvm/gems/ruby-2.0.0-p247@global/gems/atomic-1.1.13/ext/gem_make.out </code></pre> <p>Thanks in advance.</p>
 

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