OS X Lion, Attempting Nokogiri install - libxml2 is missing

Question

sudo gem install nokogiri Building native extensions.  This could take a while... ERROR:  Error installing nokogiri:     ERROR: Failed to build gem native extension.          /Users/sajeev86/.rvm/rubies/ruby-1.8.7-p352/bin/ruby extconf.rb checking for libxml/parser.h... no ----- libxml2 is missing.  please visit http://nokogiri.org/tutorials/installing_nokogiri.html for help with installing dependencies. ----- *** 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. 

I can't get Nokogiri to install. This has been taxing me for a while now. I've installed the dependencies via MacPorts and Homebrew as well.

I've got a feeling the right directories are not pointed to each other? But haven't a clue how to fix.

Answer 1

In Mavericks, installing the libraries with Homebrew and setting NOKOGIRI_USE_SYSTEM_LIBRARIES=1 before installing the gem did the trick for me.

Summarising:

• If previously installed, uninstall the gem:
  $ gem uninstall nokogiri

• Use Homebrew to install libxml2, libxslt and libiconv:
  $ brew install libxml2 libxslt libiconv

• Install the gem specifying the paths to the libraries to be linked against:
  $ NOKOGIRI_USE_SYSTEM_LIBRARIES=1 gem install nokogiri -- --use-system-libraries --with-iconv-dir="$(brew --prefix libiconv)" --with-xml2-config="$(brew --prefix libxml2)/bin/xml2-config" --with-xslt-config="$(brew --prefix libxslt)/bin/xslt-config"

Answer 2

Absolutely none of the other answers here worked for me.

On the latest version of Mavericks, the only method that succeeded for me was the following:

$ brew install libxml2 libxslt libiconv $ sudo gem install nokogiri -v '1.6.5' -- --use-system-libraries --with-xml2-include=/usr/include/libxml2 --with-xml2-lib=/usr/lib