Ruby - rmagick gem on windows

I have been using Ruby 1.9.1 and unfortunately the precompiled binary rmagick-win32 gem is available only for 1.8.6. In order to use it on windows one needs to recompile the sources and install the gem. Fortunately after checking several different proposals on how to do that I found one that worked for me - it can be found here: http://www.waydotnet.com/blog/2010/02/rmagick-on-ruby-1-9-1-i386-mingw32-work-d/

My configuration is:

identify -version
Version: ImageMagick 6.6.3-7 2010-08-14 Q16 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2010 ImageMagick Studio LLC
Features: OpenMP
ruby -v
ruby 1.9.1p378 (2010-01-10 revision 26273) [i386-mingw32]

The OS in my case is Windows 7, 64-bit.

Please do not forget (as I did) to replace the types (xml file from imagemagick), otherwise you will experience problems with the examples from the rmagick gem (e.g. watermark.rb).