nokogiri fails to install osx - ruby-on-rails

Question

I saw a lot of questions of this kind but I have a little different situation, so i'm doing bundle install and got this:
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby -r ./siteconf20150109-25233-1jiriou.rb extconf.rb --with-iconv-dir=/usr/local/Cellar/libiconv/1.14/
checking if the C compiler accepts ... yes
checking if the C compiler accepts -Wno-error=unused-command-line-argument-hard-error-in-future... no
Building nokogiri using packaged libraries.
checking for iconv using --with-iconv-* flags... no
checking for iconv... no
-----
libiconv 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
--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=/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/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 /var/folders/sk/x8m9btmj1g58c906v0z3k2br0000gq/T/bundler20150109-25233-o53u4y/nokogiri-1.6.5/gems/nokogiri-1.6.5 for inspection.
Results logged to /var/folders/sk/x8m9btmj1g58c906v0z3k2br0000gq/T/bundler20150109-25233-o53u4y/nokogiri-1.6.5/extensions/universal-darwin-14/2.0.0/nokogiri-1.6.5/gem_make.out
An error occurred while installing nokogiri (1.6.5), and Bundler cannot continue.
Make sure that `gem install nokogiri -v '1.6.5'` succeeds before bundling.
I have libiconv installed, I tried in this way gem install nokogiri -- --with-iconv-dir=/usr/local/Cellar/libiconv/1.14/ gem installs ok but than i try to bundle I got the same error again the same situation is when I try to do gem install nokogiri -v '1.6.5' the installation is ok, I can see the gem in the list of gems but seems like bundler is not seeing it, I tried to include it in my gem file with this specific version but still have this error

Answer 1

This worked for me: http://www.nokogiri.org/tutorials/installing_nokogiri.html#using_nonstandard_libxml2___libxslt_installations
gem install nokogiri -- \
--use-system-libraries \
--with-xml2-config=/usr/bin/xml2-config \
--with-xslt-config=/usr/bin/xslt-config
And then bundle update

Answer 2

You can use bundle config to set that path:
bundle config build.nokogiri "--with-iconv-dir=/usr/local/Cellar/libiconv/1.14/"
bundle install

Answer 3

This works for me bundle config build.nokogiri "--use-system-libraries --with-xml2-include=/usr/local/opt/libxml2/include/libxml2"
Run this command to set the config before bundle install
I got this solution from https://github.com/sparklemotion/nokogiri/issues/1099

Answer 4

This worked for me, thanks to Gergo & cbertelegni:
bundle config build.nokogiri "-- \
--use-system-libraries \
--with-xml2-config=/usr/bin/xml2-config \
--with-xslt-config=/usr/bin/xslt-config"
bundle install