Michael de Silva's Blog

Software Engineer. Rubyist and Roboticist.

Michael de Silva's Blog

Software Engineer. Rubyist and Roboticist.

Installing RMagick & ImageMagick on OS X Mountain Lion

It's another one of those pesky gem installs.

  gem install rmagick -v '2.13.1'
  Building native extensions.  This could take a while...
  ERROR:  Error installing rmagick:
    ERROR: Failed to build gem native extension.

          /mike/.rbenv/versions/1.9.3-p392/bin/ruby extconf.rb
  checking for Ruby version >= 1.8.5... yes
  extconf.rb:128: Use RbConfig instead of obsolete and deprecated Config.
  checking for gcc... yes
  checking for Magick-config... yes
  checking for ImageMagick version >= 6.4.9... yes
  checking for HDRI disabled version of ImageMagick... yes
  checking for stdint.h... yes
  checking for sys/types.h... yes
  checking for wand/MagickWand.h... yes
  checking for InitializeMagick() in -lMagickCore... no
  checking for InitializeMagick() in -lMagick... no
  checking for InitializeMagick() in -lMagick++... no
  Can't install RMagick 2.13.1. Can't find the ImageMagick library or one of the dependent libraries. Check the mkmf.log file for more detailed information.

  *** 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=/mike/.rbenv/versions/1.9.3-p392/bin/ruby
    --with-MagickCorelib
    --without-MagickCorelib
    --with-Magicklib
    --without-Magicklib
    --with-Magick++lib
    --without-Magick++lib


  Gem files will remain installed in /mike/.rbenv/versions/1.9.3-p392/lib/ruby/gems/1.9.1/gems/rmagick-2.13.1 for inspection.
  Results logged to /mike/.rbenv/versions/1.9.3-p392/lib/ruby/gems/1.9.1/gems/rmagick-2.13.1/ext/RMagick/gem_make.out

Googling the subject will bring up quite a few various approaches, of which none worked for me. I even uninstalled and re-installed ImageMagick with the --vd option.

The solution to this is to simply perform the following (Ref: https://coderwall.com/p/wnomjg)

  $ cd /usr/local/Cellar/imagemagick/6.8.0-10/lib
  $ ln -s libMagick++-Q16.7.dylib   libMagick++.dylib
  $ ln -s libMagickCore-Q16.7.dylib libMagickCore.dylib
  $ ln -s libMagickWand-Q16.7.dylib libMagickWand.dylib

Let's try it one more time! Notice that I've passed two paths based on ImageMagick's homebrew install as well.

  $ PKG_CONFIG_PATH=/usr/local/Cellar/imagemagick/6.8.0-10/lib/pkgconfig
  C_INCLUDE_PATH=/usr/local/Cellar/imagemagick/6.8.0-10/include/ImageMagick gem install rmagick -v '2.13.1'
  Building native extensions.  This could take a while...
  Successfully installed rmagick-2.13.1
  1 gem installed
  Installing ri documentation for rmagick-2.13.1...
  Installing RDoc documentation for rmagick-2.13.1...
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