Cannot install RMagic gem - ruby-on-rails

Question

I'd like to install RMagic gem, I got “Can't find Magick-config” so I installed
$ sudo apt-get install libmagickwand-dev
but now I get following output:
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
/usr/local/rvm/rubies/ruby-2.1.5/bin/ruby -r
./siteconf20150526-12203-xr9xf7.rb extconf.rb checking for Ruby
version >= 1.8.5... yes checking for gcc... yes checking for
Magick-config... yes checking for ImageMagick version >= 6.4.9... *
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=/usr/local/rvm/rubies/ruby-2.1.5/bin/ruby extconf.rb:154:in ``': No such file or directory - convert
(Errno::ENOENT)
from extconf.rb:154:in block in <main>'
from /usr/local/rvm/rubies/ruby-2.1.5/lib/ruby/2.1.0/mkmf.rb:918:inblock
in checking_for'
from /usr/local/rvm/rubies/ruby-2.1.5/lib/ruby/2.1.0/mkmf.rb:351:in block
(2 levels) in postpone'
from /usr/local/rvm/rubies/ruby-2.1.5/lib/ruby/2.1.0/mkmf.rb:321:inopen'
from /usr/local/rvm/rubies/ruby-2.1.5/lib/ruby/2.1.0/mkmf.rb:351:in block
in postpone'
from /usr/local/rvm/rubies/ruby-2.1.5/lib/ruby/2.1.0/mkmf.rb:321:inopen'
from /usr/local/rvm/rubies/ruby-2.1.5/lib/ruby/2.1.0/mkmf.rb:347:in
postpone'
from /usr/local/rvm/rubies/ruby-2.1.5/lib/ruby/2.1.0/mkmf.rb:917:in
checking_for'
from extconf.rb:151:in `'
extconf failed, exit code 1
Gem files will remain installed in
/usr/local/rvm/gems/ruby-2.1.5#rails4/gems/rmagick-2.13.4 for
inspection. Results logged to
/usr/local/rvm/gems/ruby-2.1.5#rails4/extensions/x86_64-linux/2.1.0/rmagick-2.13.4/gem_make.out
Could someone help me solve it?

Answer 1

Look at where it fails (which was hard to work out because your newlines got swallowed somewhere):
checking for ImageMagick version >= 6.4.9... * extconf.rb failed *
This check didn't get a "yes", which suggests that the libmagickwand-dev package you installed did not provide a version of ImageMagic >= 6.4.9 which is apparently the version that the rmagick gem version 2.13.4 requires.
Either get a newer ImageMagick or an older rmagick gem.

Answer 2

Make sure you install ImageMagick. Usually, not having the right dependencies is the culprit.
http://www.imagemagick.org/script/install-source.php

Answer 3

After trying the above solutions and still not working .. i tried this one
sudo apt-get install graphicsmagick-libmagick-dev-compat
did the trick for me