I recently upgraded my OS from Ubuntu 12.04 ro 13.04, Since then my 'rmagick' gem was not working. I used to get below error while starting my rails server ;
libMagickCore.so.4: cannot open shared object file: No such file or directory - /home/shilesh/.rvm/gems/ruby-1.8.7-p352@rails_2.3.16/gems/rmagick-2.12.2/lib/RMagick2.so (LoadError)
Installing gem using bundler used to give below error;
$ gem install rmagickBuilding native extensions. This could take a while...ERROR: Error installing rmagick: ERROR: Failed to build gem native extension.
/home/shilesh/.rvm/rubies/ruby-1.8.7-p352/bin/ruby extconf.rbchecking for Ruby version >= 1.8.5... yeschecking for gcc... yeschecking for Magick-config... yeschecking for ImageMagick version >= 6.4.9... yeschecking for HDRI disabled version of ImageMagick... yeschecking for stdint.h... yeschecking for sys/types.h... yeschecking for wand/MagickWand.h... no
Can't install RMagick 2.13.2. Can't find MagickWand.h.*** extconf.rb failed ***Could not create Makefile due to some reason, probably lack ofnecessary libraries and/or headers. Check the mkmf.log file for moredetails. You may need configuration options
Finally I re-installed ImageMagick and RMagick gem as given below, that worked,finally.
$ sudo apt-get install imagemagick
$sudo apt-get install libmagickwand-dev
$ gem install rmagick
Building native extensions. This could take a while...
Successfully installed rmagick-2.13.2
1 gem installed
Installing ri documentation for rmagick-2.13.2...
Installing RDoc documentation for rmagick-2.13.2..
