Installing RMagick gem -- Can't find MagickWand.h

Question

I am installing the rmagick gem on OSX 10.6.8, using gem install rmagick, and I am getting the following error

    Can't install RMagick 2.13.1. Can't find MagickWand.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
    --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/disaacs/.rvm/rubies/ruby-1.9.3-p125/bin/ruby


Gem files will remain installed in /Users/disaacs/.rvm/gems/ruby-1.9.3-p125/gems/rmagick-2.13.1 for inspection.
Results logged to /Users/disaacs/.rvm/gems/ruby-1.9.3-p125/gems/rmagick-2.13.1/ext/RMagick/gem_make.out

Looking in the mkmf.log file I see

have_header: checking for wand/MagickWand.h... -------------------- no

"/usr/bin/gcc-4.2 -E -I/Users/disaacs/.rvm/rubies/ruby-1.9.3-p125/include/ruby-1.9.1/x86_64-darwin10.8.0 -I/Users/disaacs/.rvm/rubies/ruby-1.9.3-p125/include/ruby-1.9.1/ruby/backward -I/Users/disaacs/.rvm/rubies/ruby-1.9.3-p125/include/ruby-1.9.1 -I.      conftest.c -o conftest.i"
conftest.c:3:29: error: wand/MagickWand.h: No such file or directory

It's true. The file MagickWand.h is not found in any of the directories specific by the -I directives of the gcc-4.2 command. Why not? And how can I fix this?

ImageMagick is installed, using homebrew. If I search my drive I find MagicWand.h installed in /usr/local/Cellar/imagemagick/6.7.7-6/include/ImageMagick/wand/MagickWand.h.

I've tried all the suggestions in Can't install RMagick 2.13.1. Can't find MagickWand.h., but none of them have worked.

Edit: Another thing to note: I originally had ImagMagick 6.7.0-7 installed using MacPorts, and RMagick installed just fine. Except that it would not work with the CarrierWave gem. So I uninstalled MacPorts and uninstalled RMagick. Then reinstalled ImageMagick using brew install -f imagemagick --disable-openmp, and attempted to reinstall the rmagick gem (which brings me to my current problem). I restarted all terminals at each step, to ensure that my paths were refreshed.

Answer 1

For Debian-based (e.g., Ubuntu) systems you can try,

sudo apt-get install libmagickcore-dev libmagickwand-dev
gem install rmagick

it works for me.

found solution from ruby-forum