Error installing Rmagick on Mac OS X

I followed the installation of RMagick for OSX: http://rmagick.rubyforge.org/install-faq.html#osx

I have done the Imagemagick installation from John Maddux (solution to install ImageMagick on OSX without开发者_开发百科 using MacPorts)

Here's my terminal window:

Suebphatt:~ suebphattleelertphong$ ruby -v
ruby 1.8.7 (2009-06-12 patchlevel 174) [universal-darwin10.0]

Suebphatt:~ suebphattleelertphong$ rails -v
Rails 3.0.3

Suebphatt:~ suebphattleelertphong$ gem -v
1.3.7

Suebphatt:~ suebphattleelertphong$ gem install rmagick
Building native extensions.  This could take a while...
ERROR:  Error installing rmagick:
ERROR: Failed to build gem native extension.

/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb
mkmf.rb can't find header files for ruby at /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/ruby.h


Gem files will remain installed in /Library/Ruby/Gems/1.8/gems/rmagick-2.13.1 for     inspection.
Results logged to /Library/Ruby/Gems/1.8/gems/rmagick-2.13.1/ext/RMagick/gem_make.out
Suebphatt:~ suebphattleelertphong$ 

Thanks a lot for help, Suebphatt

I would strongly recommend you try homebrew, which is a great replacement for macports:

• http://brew.sh
• http://github.com/mxcl/homebrew

Once you get homebrew installed, you should be able to install imagemagick and rmagick very easily:

brew install imagemagick     # will take a while!
gem install rmagick

More info here:

http://www.codedrop.ca/blog/archives/214

and here:

http://weblogs.manas.com.ar/mverzilli/2010/05/19/install-the-rmagick-gem-in-the-painless-way-with-homebrewinstall-the-rmagick-gem-in-the-painless-way-with-homebrewinstall-the-rmagick-gem-in-the-painless-way-with-homebrewinstall-the-rmagick-gem-in/

UPDATE: (thanks to JJD and this answer)

Try to install without openpmp if you are having trouble with a chiliproject install:

brew install imagemagick --disable-openmp

UPDATE X2: (thanks to Ramon Araujo's comment)

If you have previously installed imagemagick with homebrew, you will have to unlink it before you install again:

brew unlink imagemagick

Another think to watch out is the version of imagemagick. I had ImageMagick version 6.8.0, which is the latest if you install from homebrew, and rmagick just does not compile with this version. So do a

convert --version

and make sure that your ImageMagick is 6.7 or less otherwise rmagick wont compile..

Struggled with this problem for a while, and the fix below (copied from this SO answer solved the issue (specifically the section about symbolic links).

rmagick has a problem working with imagemagick (>= 6.8.0-10) from homebrew.

You can either

update rmagick gem by

bundle update rmagick

or manually symbol link some dylib to make it work:

$ cd "`Magick-config --prefix`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

After that gem install rmagick should work.

Check the discussion about this in https://github.com/Homebrew/homebrew/issues/16625