From: Tim Hunter <TimHunter@...>
Date: 2008-04-28T20:53:48+09:00
Subject: Re: RMagick installation problems

Axel Etzold wrote:
> Dear all,
> 
> I am having trouble installing/using RMagick on Ubuntu Gutsy (7.10) Linux.
> I tried various ways, and finally managed to get the installation process
> to complete "successfully" for the RMagick gem 2.3.0, after installing
> both ImageMagick and GraphicsMagick via the apt-get install process,
> along with several of the prerequisite libraries for the various graphics
> formats.
> 
> When trying some examples, (like the cropping example on the
> transformation page),
>  I get this error:
> 
> $ruby rone.rb
> /var/lib/gems/1.8/gems/rmagick-2.3.0/lib/RMagick2.so: /var/lib/gems/1.8/gems/rmagick-2.3.0/lib/RMagick2.so: undefined symbol: SketchImage - /var/lib/gems/1.8/gems/rmagick-2.3.0/lib/RMagick2.so (LoadError)
>         from /usr/lib/ruby/1.8/rubygems/custom_require.rb:32:in `require'
>         from /var/lib/gems/1.8/gems/rmagick-2.3.0/lib/RMagick.rb:11
>         from /usr/lib/ruby/1.8/rubygems/custom_require.rb:32:in `gem_original_require'
>         from /usr/lib/ruby/1.8/rubygems/custom_require.rb:32:in `require'
>         from rone.rb:2
> 
> 
> Now, I've read in the documentation that apparently, some other
> library libMagickGraphicsWand.so is sought. It's there, it's found,
> but Rmagick still won't work ...
> 
> #ldconfig -p | grep Magick 
> 
> 	libMagick.so.10 (libc6) => /usr/local/lib/libMagick.so.10
> 	libMagick.so.9 (libc6) => /usr/lib/libMagick.so.9
> 	libMagick.so (libc6) => /usr/local/lib/libMagick.so
> 	libMagick.so (libc6) => /usr/lib/libMagick.so
> 	libMagick++.so.10 (libc6) => /usr/local/lib/libMagick++.so.10
> 	libMagick++.so (libc6) => /usr/local/lib/libMagick++.so
> 	libGraphicsMagickWand.so.0 (libc6) => /usr/lib/libGraphicsMagickWand.so.0
> 	libGraphicsMagick.so.1 (libc6) => /usr/lib/libGraphicsMagick.so.1
> 
> What can I do ?
> 
> Thank you very much,
> 
> Axel 

It looks like you've got a mismatch between RMagick and whichever of 
ImageMagick and GraphicsMagick it's trying to use.

Rather than trying to recover from this muddle, I recommend that you 
uninstall RMagick, ImageMagick, and GraphicsMagick altogether. You don't 
need to uninstall the delegates.

Then decide which of ImageMagick and GraphicsMagick you want to use. 
(You only need one of them, and installing both doesn't help anything.) 
If you choose ImageMagick, decide which version you want to use.

If you want to use GraphicsMagick or a version of ImageMagick older than 
6.3.0, then you'll have to install RMagick 1.15.13. If you want to use 
ImageMagick 6.3.0 or later, then you can install RMagick 2.3.0. When it 
comes time to install the RMagick gem, you can use the --version option 
to specify which version of RMagick to install. For example,

	gem install rmagick --version 1.15.13
or
	gem install rmagick --version 2.3.0

After you decide between ImageMagick and GraphicsMagick, go to the 
RMagick installation FAQ,s find the HOWTO for Linux installations and 
follow the instructions. Those instructions are for general Linux 
installations, nothing Ubuntu-specific, but I'm sure that if you Google 
for "rmagick install ubuntu" you'll find plenty of people who have 
blogged Ubuntu-specific instructions.

If you have questions post a note on the RMagick Help forum on RubyForge.

-- 
RMagick: http://rmagick.rubyforge.org/
RMagick 2: http://rmagick.rubyforge.org/rmagick2.html