Ubuntu 12.10 - Ruby gem rmagick missing dependency issue

Question

Like many others I'm having trouble installing rmagick on Ubuntu when running bundle install. I get this error on the bundle install command: ``` Installing rmagick (2.13.1) Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension. /usr/local/rvm/rubies/ruby-1.8.7-p371/bin/ruby extconf.rb checking for Ruby version >= 1.8.5... yes checking for gcc... yes checking for Magick-config... no Can't install RMagick 2.13.1. Can't find Magick-config in /usr/local/rvm/gems/ruby-1.8.7-p371/bin:/usr/local/rvm/gems/ruby-1.8.7-p371@global/bin:/usr/local/rvm/rubies/ruby-1.8.7-p371/bin:/usr/local/rvm/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games *** 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 --wi…

Accepted Answer

I found the solution:

```
sudo apt-get install aptitude
```

Then fire:

```
sudo aptitude install graphicsmagick-libmagick-dev-compat
```

When asked:

```
The following actions will resolve these dependencies:
 Keep the following packages at their current version
1)     graphicsmagick-libmagick-dev-compat [Not Installed]
2)     libexif-dev [Not Installed]
3)     libgraphicsmagick++1-dev [Not Installed]
4)     libgraphicsmagick1-dev [Not Installed]
```

Answer: "n"

```
Accept this solution? [Y/n/q/?] n
```

In second question:

```
The following actions will resolve these dependencies:

Downgrade the following packages: 
1) libexif12 [0.6.20-2ubuntu0.1 (now) -> 0.6.20-2 (precise)] 
```

Answer: "Y" or hit ENTER

```
Accept this solution? [Y/n/q/?]
```

Wait until task end ;)

Ubuntu 12.10 - Ruby gem rmagick missing dependency issue

Solution

Problem