Rails bundle install not working error with nokogiri - ruby-on-rails

Question

I started a new rails project, cd'd inside it and then tried to bundle install
I got the following error
An error occurred while installing nokogiri (1.6.7), and Bundler cannot
continue.
Make sure that gem install nokogiri -v '1.6.7' succeeds before bundling.
I am pretty sure this is a level A problem I tried googling it but found nothing, hope i didnt overlook it
Thanks for any help
edit: if i try to manually install nokogiri it gives the following error
Adams-MacBook-Pro:fancy_cars adamkatz$ gem install nokiogiri
ERROR: Could not find a valid gem 'nokiogiri' (>= 0) in any repository
ERROR: Possible alternatives: nokogiri, nokogirl, niceogiri, onigiri
Adams-MacBook-Pro:fancy_cars adamkatz$ gem install nokogiri
Building native extensions. This could take a while...
ERROR: Error installing nokogiri:
ERROR: Failed to build gem native extension.
/Users/adamkatz/.rbenv/versions/2.2.3/bin/ruby -r ./siteconf20151213-2420-12wvig2.rb extconf.rb
checking if the C compiler accepts ... *** 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/adamkatz/.rbenv/versions/2.2.3/bin/$(RUBY_BASE_NAME)
--help
--clean
/Users/adamkatz/.rbenv/versions/2.2.3/lib/ruby/2.2.0/mkmf.rb:456:in `try_do': The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.
from /Users/adamkatz/.rbenv/versions/2.2.3/lib/ruby/2.2.0/mkmf.rb:571:in `block in try_compile'
from /Users/adamkatz/.rbenv/versions/2.2.3/lib/ruby/2.2.0/mkmf.rb:522:in `with_werror'
from /Users/adamkatz/.rbenv/versions/2.2.3/lib/ruby/2.2.0/mkmf.rb:571:in `try_compile'
from extconf.rb:80:in `nokogiri_try_compile'
from extconf.rb:87:in `block in add_cflags'
from /Users/adamkatz/.rbenv/versions/2.2.3/lib/ruby/2.2.0/mkmf.rb:619:in `with_cflags'
from extconf.rb:86:in `add_cflags'
from extconf.rb:336:in `'
extconf failed, exit code 1
Gem files will remain installed in /Users/adamkatz/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7 for inspection.
Results logged to /Users/adamkatz/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/extensions/x86_64-darwin-14/2.2.0-static/nokogiri-1.6.7/gem_make.out

Answer 1

You need to install the OS X development tools (the output says so, towards the end).
Here are some good instructions on installing xcode: Installing Ruby on Rails on Mac for Ruby on Rails development (about half way down)
If that works it looks like the simplest way to get you there.
If that doesn't work you might find help here:
http://tosbourn.com/nokogiri-wont-install-check-accepted-xcodes-eula/
SO: Installing Nokogiri on OS X 10.10 Yos