RMagick error installing Redmine on Windows

Question

I'm trying to upgrade my Redmine installation to the latest. I updated ruby, rails, and gem as required.

current trunk  |  ruby 1.8.7, 1.9.2, 1.9.3, jruby-1.6.7  |  Rails 3.2.6   |  RubyGems <= 1.8

Issuing the rake db:migrate command it gives me the following error:

C:\ruby-apps\RedMine>rake db:migrate RAILS_ENV=production
←[31mCould not find gem 'rmagick (>= 2.0.0) x86-mingw32' in the gems available on this machine.←[0m
←[33mRun bundle install to install missing gems.←[0m

So I installed rmagick for win32 and listing installed gems I see :

...
railties (3.2.6)
rake (0.9.2.2)
rdoc (3.12)
rmagick (2.12.0 mswin32)
ruby-openid (2.1.8)
rubygems-update (1.8.24)
...

But rake db:migrate still give me the same error, so I tried bundle install, but I get:

Temporarily enhancing PATH to include DevKit...
Building native extensions. This could take a while...
ERROR: Error installing rmagick:
ERROR: Failed to build gem native extension.

   C:/Ruby193/bin/ruby.exe extconf.rb  

checking for Ruby version >= 1.8.5... yes
checking for stdint.h... * 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.

Any ideas on how to get out of this?

Answer 1

Actually Bitnami's Redmine windows Installer contains a solution to this problem.
Using it, for me is a valid solution to the problem.

The content of the installation may be used to inspect correct versions and dependencies to correctly build Redmine.

Answer 2

I ran into the same problem while installing redmine. According to a comment in the Gemfile rmagick optional and only used to export Gant graphs as PNGs. So if you do not need this specific feature you can run

bundle install --without development test rmagick