Failure to install nokogiri libiconv is missing on Yosemite Mac OS X 10.10

Question

Trying to install Nokogiri I’m getting the following error

Maxims-MacBook-Air:ScrapingTheApple maximveksler$ gem install nokogiri
Fetching: nokogiri-1.6.2.1.gem (100%)
Building native extensions.  This could take a while...
Building nokogiri using packaged libraries.
ERROR:  Error installing nokogiri:
    ERROR: Failed to build gem native extension.

    /Users/maximveksler/.rvm/rubies/ruby-2.1.2/bin/ruby extconf.rb
Building nokogiri using packaged libraries.
-----
libiconv 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.

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/maximveksler/.rvm/rubies/ruby-2.1.2/bin/ruby
    --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

extconf failed, exit code 1

Gem files will remain installed in /Users/maximveksler/.rvm/gems/ruby-2.1.2/gems/nokogiri-1.6.2.1 for inspection.
Results logged to /Users/maximveksler/.rvm/gems/ruby-2.1.2/extensions/x86_64-darwin-13/2.1.0-static/nokogiri-1.6.2.1/gem_make.out

Answer 1

I suggest an update to Oskar's answer, replace MacOSX10.9.sdk to MacOSX10.10.sdk, tested on OS X 10.10

gem install nokogiri -- \
--with-iconv-lib=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/usr/lib \
--with-iconv-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/usr/include

Answer 2

The nokogiri install tutorial provides the solution:

# bash
brew unlink gcc
gem uninstall nokogiri
xcode-select --install
gem install nokogiri

If you don't have Xcode 6.1, yet, you may install it from the apple developer download site (section additional tools), as described in this blog post.

Answer 3

I was successfull with:

gem install nokogiri -- \
--with-iconv-lib=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/lib \
--with-iconv-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include

Answer 4

without brew and other stuff:

xcode-select --install 
gem install nokogiri -- --use-system-libraries