title: Rails rmagick error Ubuntu c9.io
body: <p>I've been looking around on other rmagick threads for a good solution. Nothing has worked so far. </p>
  
  <p>I'm working on a rails project on c9 IDE. I managed to successfully install imagemagick via the 'sudo apt get install imagemagick' command.</p>
  
  <p>However when I try to run 'gem install rmagick' I get the following error </p>
  
  <pre><code>Building native extensions.  This could take a while...
  ERROR:  Error installing rmagick:
      ERROR: Failed to build gem native extension.
  
  current directory: /usr/local/rvm/gems/ruby-2.3.0/gems/rmagick-2.15.4/ext/RMagick
  /usr/local/rvm/rubies/ruby-2.3.0/bin/ruby -r ./siteconf20160608-3911-1hut05d.rb extconf.rb
  checking for gcc... yes
  checking for Magick-config... no
  checking for pkg-config... yes
  Package MagickCore was not found in the pkg-config search path.
  Perhaps you should add the directory containing `MagickCore.pc' to the PKG_CONFIG_PATH environment variable
  No package 'MagickCore' found checking for outdated ImageMagick version (&lt;= 6.4.9)... *** 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=/usr/local/rvm/rubies/ruby-2.3.0/bin/$(RUBY_BASE_NAME)
  
  To see why this extension failed to compile, please check the mkmf.log which can be found here:
  
   /usr/local/rvm/gems/ruby-2.3.0/extensions/x86_64-linux/2.3.0/rmagick-2.15.4/mkmf.log extconf failed, exit code 1
  
  Gem files will remain installed in /usr/local/rvm/gems/ruby 2.3.0/gems/rmagick-2.15.4 for inspection.
  Results logged to /usr/local/rvm/gems/ruby-2.3.0/extensions/x86_64-linux/2.3.0/rmagick-2.15.4/gem_make.out
  </code></pre>