Installing Nokogiri MAC Os X 10.8.2 Xcode Installed

Installing nokogiri Mac OS X 10.8.2 XCode installed

After short research I find out what problem can be simply solved by creating symbolic link

sudo ln -s /usr/bin/gcc /usr/bin/gcc-4.2

works for me hope for you too

gem install nokogiri
Building native extensions.  This could take a while...
ERROR:  Error installing nokogiri:
    ERROR: Failed to build gem native extension.

        /Users/morozovm/.rvm/rubies/ruby-1.9.3-p327/bin/ruby extconf.rb
checking for libxml/parser.h... *** extconf.rb failed ***

bash-3.2$ sudo ln -s /usr/bin/gcc /usr/bin/gcc-4.2
Password:
bash-3.2$ gem install nokogiri
Building native extensions.  This could take a while...
Successfully installed nokogiri-1.5.6
1 gem installed

Mountain Lion - LibXML & Nokogiri

Putting gem 'nokogiri' above gem 'pg' in my Gemfile fixed this for me.

My Gemfile didn't have nokogiri in it, but it was a dependency that was in Gemfile.lock, so I put it in my Gemfile explicitly.

WARNING: Nokogiri was built against LibXML version 2.7.3, but has dynamically loaded 2.7.8

I have found some fixes for Lion, but none for Mountain Lion yet. Nonetheless I have tried this and it works:

gem uninstall nokogiri libxml-ruby

brew update
brew uninstall libxml2
brew install libxml2 --with-xml2-config
brew link libxml2

brew install libxslt
brew link libxslt

gem install nokogiri -- --with-xml2-include=/usr/local/Cellar/libxml2/2.8.0/include/libxml2/ --with-xml2-lib=/usr/local/Cellar/libxml2/2.8.0/lib/ --with-xslt-dir=/usr/local/Cellar/libxslt/1.1.26/

Source (for Lion): https://gist.github.com/1349681

Bundle update & install fail after OS X lion upgrade - Rails 3

Make sure to install XCode. Install it from the App Store, but also run "Install Xcode" from the Applications folder.

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