Trouble Installing Nokogiri on Mac OS X Yosemite v.10.10.1 because of libxml2 while upgrading to Rails 4.2.0

Question

I'm trying to install Rails 4.2.0 on my computer, but I am having issues installing Nokogiri. I followed the steps in the first answer for "bundle install stopped at Nokogiri", but when I run brew install nokogiri, I get the following:

Activating libxslt 1.1.28 (from /Users/dseibert/.rvm/rubies/ruby-2.2.0/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.6.2/ports/x86_64-apple-darwin14.0.0/libxslt/1.1.28)...
checking for main() in -llzma... yes
checking for xmlParseDoc() in libxml/parser.h... no
checking for xmlParseDoc() in -lxml2... no
checking for xmlParseDoc() in -llibxml2... no
-----
libxml2 is missing.  Please locate mkmf.log to investigate how it is failing.
-----
*** 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/dseibert/.rvm/rubies/ruby-2.2.0/bin/$(RUBY_BASE_NAME)
    --help
    --clean
    --use-system-libraries
    --enable-static
    --disable-static
    --with-zlib-dir
    --without-zlib-dir
    --with-zlib-include
    --without-zlib-include=${zlib-dir}/include
    --with-zlib-lib
    --without-zlib-lib=${zlib-dir}/lib
    --enable-cross-build
    --disable-cross-build
    --with-xml2lib
    --without-xml2lib
    --with-libxml2lib
    --without-libxml2lib

extconf failed, exit code 1

Gem files will remain installed in /Users/dseibert/.rvm/rubies/ruby-2.2.0/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.6.2 for inspection.
Results logged to /Users/dseibert/.rvm/rubies/ruby-2.2.0/lib/ruby/gems/2.2.0/extensions/x86_64-darwin-14/2.2.0/nokogiri-1.6.6.2/gem_make.out

I cant find the mkmf file to locate the details of my libxml2 file, and I don't see either the libxml2 file or the Nokogiri folder within my Ruby source folder.

And when I run brew install libxml2, I get Warning: libxml2-2.9.2 already installed.

---

Following the comment, I got the response: Successfully installed nokogiri-1.6.6.2. But when I ran sudo gem install rails, I got back the above error again.

Answer 1

Try this

gem install nokogiri -- --use-system-libraries=true --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/usr/include/libxml2/

This works on OSX 10.11 El Capitan

Answer 2

Try this:

bundle config build.nokogiri --use-system-libraries
bundle install

This works on rails 4.2.0, OS X 10.11.2 El Capitan and Xcode 7.2.1 installed You will get while running bundler:

Installing nokogiri 1.6.7.2 with native extensions