Ruby gem rmagick won't install on Mac OS X - ruby

Question

I understand that this question has been asked a lot earlier, but none of the solutions worked for me and I'm really desperate right now.
I'm trying to get rMagick to install using gem for an installation of diaspora. I already installed imagick via homebrew and when trying to run gem install rmagick I receive this error:
ERROR: Error installing rmagick:
ERROR: Failed to build gem native extension.
/Users/tobischweiger/.rvm/rubies/ruby-1.9.3-p385/bin/ruby extconf.rb
checking for Ruby version >= 1.8.5... yes
checking for gcc-4.2... yes
checking for Magick-config... no
Can't install RMagick 2.13.2. Can't find Magick-config in /Users/tobischweiger/.rvm/gems/ruby-1.9.3-p385#diaspora/bin:/Users/tobischweiger/.rvm/gems/ruby-1.9.3-p385#global/bin:/Users/tobischweiger/.rvm/rubies/ruby-1.9.3-p385/bin:/Users/tobischweiger/.rvm/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/opt/X11/bin:/usr/local/git/bin
*** 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/tobischweiger/.rvm/rubies/ruby-1.9.3-p385/bin/ruby
Gem files will remain installed in /Users/tobischweiger/.rvm/gems/ruby-1.9.3-p385#diaspora/gems/rmagick-2.13.2 for inspection.
Results logged to /Users/tobischweiger/.rvm/gems/ruby-1.9.3-p385#diaspora/gems/rmagick-2.13.2/ext/RMagick/gem_make.out
I'm not very experienced with gem and homebrew and I'm wondering if somebody could help me out.

Answer 1

Run this (using homebrew) before attempting to install the gem.
brew install imagemagick

Answer 2

This is the less destructive version using homebrew, rmagic also doesn't work with imagemacigk version 7
ImageMagick Version 6.4.9 or later (6.×.x). Version 7 is NOT yet
supported; ETA April 2019 (https://github.com/rmagick/rmagick/pull/299 )
(from Readme)
. You can get ImageMagick from www.imagemagick.org., so with brew try this
brew install imagemagick#6
PKG_CONFIG_PATH=/usr/local/opt/imagemagick#6/lib/pkgconfig gem install rmagick

Answer 3

I'm using OS X Lion.
I ran brew doctor and saw that imagemagick was unlinked so it told me to run brew link imagemagick.
Then I closed and re-opened my terminal and everything worked thankfully.

Answer 4

On Mavericks, you can do it:
brew install pkgconfig
brew uninstall imagemagick
brew install imagemagick
brew link imagemagick
bundle install
It's enough. I think.

Answer 5

I had a similar issue and this worked for me:
$ 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
Hope this helps.
Credit: https://coderwall.com/p/wnomjg

Answer 6

Make sure when you do these:
$ 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
that you change the file names to reflect your version: you can see the filenames by looking in the lib folder here: cd /usr/local/Cellar/imagemagick/VERSION/lib
ex:
ln -s libMagickWand-6.Q16.1.dylib libMagickWand.dylib
and so on

Answer 7

There are different scenarios we need to check while installing RMagick. Please check following and confirm:
Check if you are not installing latest version of RMagick with older version of ruby. i.e. ruby 1.8.7 or so. You can not install latest version of RMagick with older version of Ruby. If so, you will probably get this error message.
Building native extensions. This could take a while...
ERROR: Error installing rmagick:
ERROR: Failed to build gem native extension.
/Users/user/.rbenv/versions/1.8.7-p375/bin/ruby extconf.rb
Make sure you have installed imagemagick before you install RMagick.
brew install imagemagick
Also make sure you are installing RMagick with compatible version of imagemagick. RMagick is not compatible with latest version of imagemagick.
More to this:
instead of using RMagick you can use MiniMagick if you just need to resize, sharpen, transform existing images. RMagick is required when we need to create image, graphs, drawings and typography. It’s easier to work with and much lighter on system resources than RMagick. RMagick consumes huge amount of memory.

Answer 8

The main issue seems to be getting imagemagick properly installed and linked.
This page was very helpful for me:
http://sethvargo.com/20110726/install-imagemagick-on-mountain-lion/
I'm running homebrew, and getting the brew doctor command to run clean was the key to getting this to install.

Answer 9

I found that updating my Xcode to the latest version (4.6.1) on OSX 1.8.2 fixed this problem and I Successfully installed rmagick-2.13.2

Answer 10

For me, I had to look at the output which in your case is
/Users/tobischweiger/.rvm/gems/ruby-1.9.3-p385#diaspora/gems/rmagick-2.13.2/ext/RMagick
In there is a file called mkmf.log that lists exactly what it is trying to compile and the error. For me, the linker was failing with this command:
ld: library not found for -lMagickCore
Reviewing the command it was running it looked good except for the very end, see this snippet:
-lMagickCore-6.Q16 -lMagickCore-6.Q16 -lruby-static -framework CoreFoundation -lMagickCore -lpthread -ldl -lobjc -lSystem /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/clang/6.0/lib/darwin/libclang_rt.osx.a
Note that it got the output from Magick-config and used those by adding -lMagickCore-6.Q16 but it was still trying to link -lMagickCore. I think this is a byproduct of the have_library extconf is using. Important for me, was that there was no libMagickCore.dylib library provided by Homebrew. It could be an old version of rubygems and I think the correct fix would be to update the have_library function but I fixed it by making a symlink called libMagickCore.dylib that pointed to libMagickCore-6.Q16.dylib.