libiconv is missing -nokogiri (1.6.3.1)

[ericbrooke]

Mac OS X 10.9.4/ Ruby 2.1.2/ Homebrew 0.9

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

.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

An error occurred while installing nokogiri (1.6.3.1), and Bundler cannot continue. Make sure that gem install nokogiri -v '1.6.3.1' succeeds before bundling.

$brew install libiconv
Warning: libiconv-1.14 already installed

$brew link libiconv
Warning: Already linked: /usr/local/Cellar/libiconv/1.14

Tried these solutions:
#442

[ericbrooke]

Followed the instructions on Homebrew 0.9 http://nokogiri.org/tutorials/installing_nokogiri.html#homebrew_09
which work, just updated to later versions

The gem finally installs, BUT

It breaks my rails :-(

Reason: Incompatible library version: nokogiri.bundle requires version 8.0.0 or later, but libiconv.2.dylib provides version 7.0.0 - /.rvm/gems/ruby-2.1.2@mbh/extensions/x86_64-darwin-13/2.1.0-static/nokogiri-1.6.3.1/nokogiri/nokogiri.bundle

[knu]

So, what's the real error found in mkmf.log?

[markjreed]

OK, the problem for me was that the system-installed Ruby is universal and tries to build universal native extensions, but the homebrew-installed libraries are x86_64 only. I was able to get it to work by manually mangling the system rbconfig.rb so that it only reports x86_64 instead of universal.

[paulhhowells]

ericbrooke wrote:

Followed the instructions on Homebrew 0.9 http://nokogiri.org/tutorials/installing_nokogiri.html#homebrew_09 
which work, just updated to later versions

however I noticed that

brew install libxml2 libxslt

installs libxml2 2.9.1

and so when attempting gem install nokogiri with all the options in the instructions, it fails with:

For example, libxml2-2.9.0 and higher are currently known to be broken
and thus unsupported by nokogiri, due to compatibility problems and
XPath optimization bugs.

[drale2k]

The instructions on the website don't work. It says the options i pass do not exist

invalid option: --with-iconv-include=/usr/local/Cellar/libiconv/1.14/include

Update: I forgot to pass 2 dashes before the option flags like "-- --with... "

[flavorjones]

I believe the installation tutorial currently provides a working procedure for OSX:

http://www.nokogiri.org/tutorials/installing_nokogiri.html

Please take a look at that and let me know if it's missing anything.