title: Rails 4: Error when installing tiny_tds gem?
body: <p>I have developed a rails web project with Ruby v2 and Rails v4. It was perfectly working in my current system and when i tried to run this project in another Linux machine (Ubuntu 12.4 ) i am getting a Tidy_tds error .</p>
  
  <p>This error is showing at the time of <code>bundle install</code> ,</p>
  
  <p>Error Details below</p>
  
  <pre><code>Gem::Ext::BuildError: ERROR: Failed to build gem native extension.                                                                                                                                
  
      /home/action/.rvm/rubies/ruby-2.1.1/bin/ruby extconf.rb                                                                                                                                       
  checking for iconv_open() in iconv.h... yes                                                                                                                                                       
  checking for sybfront.h... no                                                                                                                                                                     
  -----                                                                                                                                                                                             
  freetds is missing.    
  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-lib=${opt-dir}/lib                                                                                                                                                          
          --with-make-prog                                                                                                                                                                          
          --without-make-prog                                                                                                                                                                       
          --srcdir=.                                                                                                                                                                                
          --curdir                                                                                                                                                                                  
          --ruby=/home/action/.rvm/rubies/ruby-2.1.1/bin/ruby                                                                                                                                       
          --enable-lookup                                                                                                                                                                           
          --disable-lookup  
  --with-iconv-dir                                                                                                                                                                          
          --without-iconv-dir                                                                                                                                                                       
          --with-iconv-include                                                                                                                                                                      
          --without-iconv-include=${iconv-dir}/include                                                                                                                                              
          --with-iconv-lib       
  --without-iconv-lib=${iconv-dir}/lib                                                                                                                                                      
          --with-freetds-dir                                                                                                                                                                        
          --without-freetds-dir                                                                                                                                                                     
          --with-freetds-include                                                                                                                                                                    
          --without-freetds-include=${freetds-dir}/include   
  --with-freetds-lib                                                                                                                                                                        
          --without-freetds-lib=${freetds-dir}/lib                                                                                                                                                  
  
  extconf failed, exit code 1      
  Gem files will remain installed in /home/action/.rvm/gems/ruby-2.1.1/gems/tiny_tds-0.6.1 for inspection.                                                                                          
  Results logged to /home/action/.rvm/gems/ruby-2.1.1/extensions/x86_64-linux/2.1.0/tiny_tds-0.6.1/gem_make.out                                                                                     
  An error occurred while installing tiny_tds (0.6.1), and Bundler cannot continue.                                                                                                                 
  Make sure that `gem install tiny_tds -v '0.6.1'` succeeds before bundling. 
  </code></pre>
  
  <p>I have also tried installing tiny_tds seperatly, but still i am getting the same issue</p>
  
  <pre><code>gem install tiny_tds -v '0.6.1'
  </code></pre>
  
  <p>My gem file,</p>
  
  <pre><code>source 'https://rubygems.org'
  
  # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
  gem 'rails', '4.0.2'
  
  # Use SCSS for stylesheets
  gem 'sass-rails', '~&gt; 4.0.0'
  gem 'tiny_tds' 
  # Use Uglifier as compressor for JavaScript assets
  gem 'uglifier', '&gt;= 1.3.0'
  
  # Use CoffeeScript for .js.coffee assets and views
  gem 'coffee-rails', '~&gt; 4.0.0'
  
  # See https://github.com/sstephenson/execjs#readme for more supported runtimes
  # gem 'therubyracer', platforms: :ruby
  
  # Use jquery as the JavaScript library
  gem 'jquery-rails'
  
  # Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
  gem 'turbolinks'
  
  gem 'jquery-ui-rails' # jquery ui
  
  # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
  gem 'jbuilder', '~&gt; 1.2'
  
  group :doc do
    # bundle exec rake doc:rails generates the API under doc/api.
    gem 'sdoc', require: false
  end
  
  # Use sqlserver as the database for Active Record
  gem 'activerecord-sqlserver-adapter', :git =&gt; 'https://github.com/nextgearcapital/activerecord-sqlserver-adapter.git'
  gem "therubyracer"
  gem "less-rails" 
  gem "twitter-bootstrap-rails"
  gem 'bootstrap-datepicker-rails'
  gem 'will_paginate'
  gem 'sqlite3'
  gem 'formtastic'
  </code></pre>
  
  <p>Why is this error appearing and how to solve this issue.</p>
  
  <p>Any help is appreciated</p>