在Windows机器上安装时遇到rmagick gem的问题，它适用于Rails 3应用程序.. ruby​​版本1.8.7

Question

在Windows机器上安装时我遇到了rmagic gem的问题，它适用于Rails 3应用程序.. ruby​​版本1.8.7

Fetching source index for http://rubygems.org/ Fetching source index
for http://gemcutter.com/ Could not reach rubygems repository
http://rubygems.org/, http://gemcutter.com/, 
http://gems.rubyforge.org/, http://gems.aptana.com/,
http://gems.github.com/ Fetching source index for
http://gems.rubyforge.org/ Fetching source index for
http://gems.aptana.com/ Fetching source index for
http://gems.github.com/
Using rake (0.8.7)
Using abstract (1.0.0)
Using activesupport (3.0.1)
Using builder (2.1.2)
Using i18n (0.4.2)
Using activemodel (3.0.1)
Using erubis (2.6.6)
Using rack (1.2.1)
Using rack-mount (0.6.13)
Using rack-test (0.5.6)
Using tzinfo  (0.3.23)
Using actionpack (3.0.1)
Using mime-types (1.16)
Using polyglot (0.3.1)
Using treetop (1.4.8)
Using mail (2.2.9)
Using actionmailer (3.0.1)
Using arel (1.0.1)
Using activerecord (3.0.1)
Using activeresource (3.0.1)
Using bundler (1.0.7)
Using gdata (1.1.1)
Using json (1.4.6)
Using contacts (1.2.4)
Using fastercsv (1.5.3)
Using hpricot (0.8.3)
Using mysql (2.8.1)
Using packet (0.1.15)
Using thor (0.14.4)
Using railties (3.0.1)
Using rails (3.0.1)
Installing rmagick (2.12.0) Temporarily enhancing PATH to include DevKit with native extensions
C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/installer.rb:4 83:in
`build_extensions': ERROR: Failed to build gem native extension.
(Gem::Ins taller::ExtensionBuildError)

C:/Ruby187/bin/ruby.exe extconf.rb 
checking for Ruby version >= 1.8.5... yes 
checking for stdint.h... yes
checking for sys/types.h... yes 
checking for wand/MagickWand.h... no

Can't install RMagick 2.12.0. Can't find MagickWand.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.

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=C:/Ruby187/bin/ruby
Gem files will remain installed in C:/Ruby187/lib/ruby/gems/1.8/gems/rmagick-2.12.0 for inspection.
Results logged to C:/Ruby187/lib/ruby/gems/1.8/gems/rmagick-2.12.0/ext/RMagick/gem_make.out
from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/installer.rb:446:in `each'
from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/installer.rb:446:in `build_extensions'
from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/installer.rb:198:in `install'
from C:/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/source.rb:95:in `install'
from C:/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/installer.rb:55:in `run'
from C:/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/spec_set.rb:12:in `each'
from C:/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/spec_set.rb:12:in `each'
from C:/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/installer.rb:44:in `run'
from C:/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/installer.rb:8:in `install'
from C:/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/cli.rb:225:in `install'
from C:/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/vendor/thor/task.rb:22:in `send'
from C:/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/vendor/thor/task.rb:22:in `run'
from C:/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/vendor/thor/invocation.rb:118:in `invoke_task'
from C:/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/vendor/thor.rb:246:in `dispatch'
from C:/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/vendor/thor/base.rb:389:in `start'
from C:/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.7/bin/bundle:13
from C:/Ruby187/bin/bundle:19:in `load'
from C:/Ruby187/bin/bundle:19

Answer 1

首先安装ImageMagick，并确保在安装gem时可以找到头文件。

另外，使用适当的代码缩进使其可读。

Answer 2

您应该安装rmagick-win32 gem。按照this question

中的答案按照说明操作