Apenas faça sudo apt-get install librmagick-ruby . É uma versão já compilada do RMagick.
Uma das coisas que você precisa fazer para instalar o Rmagick
apt-get install libmagick9-dev
Quando tento obter os seguintes erros
Reading package lists... Done
Building dependency tree... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
Since you only requested a single operation it is extremely likely that
the package is simply not installable and a bug report against
that package should be filed.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
libmagick9-dev: Depends: libjpeg62-dev but it is not going to be installed
Depends: libbz2-dev but it is not going to be installed
Depends: libtiff4-dev but it is not going to be installed
Depends: libwmf-dev (>= 0.2.7-1) but it is not going to be installed
Depends: libz-dev
Depends: libpng12-dev but it is not going to be installed
Depends: libfreetype6-dev but it is not going to be installed
Depends: libexif-dev but it is not going to be installed
Depends: libdjvulibre-dev but it is not going to be installed
Depends: librsvg2-dev but it is not going to be installed
Depends: libgraphviz-dev but it is not going to be installed
E: Broken packages
Eu não sei o que fazer para corrigir isso?
EDIT 1: eu tentei
sudo apt-get install librmagick-ruby
e funcionou bem, mas depois eu precisei instalar a gem fleximage
gem1.8 install fleximage
e recebi a seguinte mensagem de erro
Building native extensions. This could take a while...
ERROR: Error installing fleximage:
ERROR: Failed to build gem native extension.
/usr/bin/ruby1.8 extconf.rb
checking for Ruby version >= 1.8.5... yes
checking for cc... yes
checking for Magick-config... no
Can't install RMagick 2.12.2. Can't find Magick-config in /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/var/lib/gems/1.8/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=/usr/bin/ruby1.8
Gem files will remain installed in /usr/lib/ruby/gems/1.8/gems/rmagick-2.12.2 for inspection.
Results logged to /usr/lib/ruby/gems/1.8/gems/rmagick-2.12.2/ext/RMagick/gem_make.out
Apenas faça sudo apt-get install librmagick-ruby . É uma versão já compilada do RMagick.
Experimente sudo apt-get install ruby1.9.1-full ruby1.9.1-dev rubygems1.9.1 ou sudo apt-get install rubygems build-essential
Tags debian ruby imagemagick