Can't install rmagick gem on Mountain Lion - ruby-on-rails-3

Question

Note: my situation is almost identical to this: Can't install pg gem on Mountain Lion.
I just upgraded from Snow Leopard to Mountain Lion and Rails is giving me all kinds of problems, especially trying to install the 'rmagick' gem. I'm running Ruby 1.9.3-p362 and Rails 3.2.11.
➜ git:(master) ✗ sudo 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.
/Users/sscirrus/.rvm/rubies/ruby-1.9.2-p320/bin/ruby extconf.rb
checking for Ruby version >= 1.8.5... yes
checking for gcc-4.2... yes
checking for Magick-config... yes
Warning: Found more than one ImageMagick installation. This could cause problems at runtime.
/opt/local/bin/Magick-config reports version 6.6.6 Q8 is installed in /opt/local
/OPT/LOCAL/BIN/Magick-config reports version 6.6.6 Q8 is installed in /opt/local
/USR/LOCAL/BIN/Magick-config reports version 6.8.0 Q16 is installed in /USR/LOCAL/Cellar/imagemagick/6.8.0-10
Using 6.6.6 Q8 from /opt/local.
checking for ImageMagick version >= 6.4.9... yes
checking for HDRI disabled version of ImageMagick... yes
checking for stdint.h... *** 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=/Users/sscirrus/.rvm/rubies/ruby-1.9.2-p320/bin/ruby
/Users/sscirrus/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:368:in `try_do': The complier failed to generate an executable file. (RuntimeError)
You have to install development tools first.
from /Users/sscirrus/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:452:in `try_cpp'
from /Users/sscirrus/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:834:in `block in have_header'
from /Users/sscirrus/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:693:in `block in checking_for'
from /Users/sscirrus/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:280:in `block (2 levels) in postpone'
from /Users/sscirrus/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:254:in `open'
from /Users/sscirrus/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:280:in `block in postpone'
from /Users/sscirrus/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:254:in `open'
from /Users/sscirrus/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:276:in `postpone'
from /Users/sscirrus/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:692:in `checking_for'
from /Users/sscirrus/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:833:in `have_header'
from extconf.rb:193:in `<main>'
Gem files will remain installed in /Users/sscirrus/.rvm/gems/ruby-1.9.2-p320/gems/rmagick-2.13.1 for inspection.
Results logged to /Users/sscirrus/.rvm/gems/ruby-1.9.2-p320/gems/rmagick-2.13.1/ext/RMagick/gem_make.out
➜ applyco git:(master) ✗ brew install imagemagick --disable-openmp
Warning: It appears you have MacPorts or Fink installed.
Software installed with other package managers causes known problems for
Homebrew. If a formula fails to build, uninstall MacPorts/Fink and try again.
Error: imagemagick-6.8.0-10 already installed
➜ applyco git:(master) ✗ apt-get install libmagick9-dev
zsh: command not found: apt-get
I have tried:
Installing Xcode with command line tools
Reinstalling homebrew
Clearing out all my repo's gems (including Gemfile.lock) and running bundle install
Reinstalling the bundler gem
Reinstalling ImageMagick
Nothing, including answers elsewhere on SO, have been of any use. Can you point me in the right direction?

Answer 1

I had the same problem as you setting up my dev environment on Mountain Lion for RoR 3.2.11. Apparently the last version of RMagick (2.13.1 ) doesn't play nice compiling with the last version of ImageMagick (6.8.2-0). Disabling openmp and building from source worked like, ahem.. Magick.
brew uninstall imagemagick
brew install imagemagick --disable-openmp --build-from-source
gem install rmagick
I didn't need to edit the brew formula described in http://blog.paulopoiati.com/2013/01/28/installing-rmagick-in-mac-os-x-mountain-lion-with-homebrew/, but that would be the next step to try.

Answer 2

I am going through the same issue here...
But one difference, maybe your homebrew its linked to another version of Imagemagick.
So even though imagemagick-6.8.0-10 is installed is not being found.
Try something like
brew unlink imagemagick
then brew link imagemagick
and see what happens.
This fixed my problem
http://robots.thoughtbot.com/post/27985816073/the-hitchhikers-guide-to-riding-a-mountain-lion

Answer 3

It may be a permissions issue try running
sudo chown -R `whoami` /usr/local
and then try again.

Answer 4

I had the same issue while trying to use Paperclip with Rails 3 for the first time.
Just to sum up previous answers, what worked for me was the following:
sudo chown -R `whoami` /usr/local
brew link --overwrite imagemagick
Thanks!