好的，我已经查看了有关此问题的所有问题，但我无法让它们中的任何一个工作。
继承我的代码：
Installing mysql2 (0.2.13) with native extensions c:/RailsInstaller/Ruby1.9.2/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:533:in `rescue i
n block in build_extensions': ERROR: Failed to build gem native extension. (Gem::Installer::ExtensionBuildError)
c:/RailsInstaller/Ruby1.9.2/bin/ruby.exe extconf.rb
checking for rb_thread_blocking_region()... yes
checking for main() in -llibmysql... no
*** 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:/RailsInstaller/Ruby1.9.2/bin/ruby
--with-mysql-dir
--without-mysql-dir
--with-mysql-include
--without-mysql-include=${mysql-dir}/include
--with-mysql-lib
--without-mysql-lib=${mysql-dir}/lib
--with-libmysqllib
--without-libmysqllib
Gem files will remain installed in c:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/mysql2-0.2.13 for inspection.
Results logged to c:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/mysql2-0.2.13/ext/mysql2/gem_make.out
from c:/RailsInstaller/Ruby1.9.2/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:511:in `block in build_extensions'
from c:/RailsInstaller/Ruby1.9.2/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:486:in `each'
from c:/RailsInstaller/Ruby1.9.2/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:486:in `build_extensions'
from c:/RailsInstaller/Ruby1.9.2/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:159:in `install'
from c:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.18/lib/bundler/source.rb:101:in `block in install'
from c:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.18/lib/bundler/rubygems_integration.rb:78:in `preserve_paths'
from c:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.18/lib/bundler/source.rb:91:in `install'
from c:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.18/lib/bundler/installer.rb:58:in `block (2 levels) in run'
from c:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.18/lib/bundler/rubygems_integration.rb:93:in `with_build_args'
from c:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.18/lib/bundler/installer.rb:57:in `block in run'
from c:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.18/lib/bundler/installer.rb:49:in `run'
from c:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.18/lib/bundler/installer.rb:8:in `install'
from c:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.18/lib/bundler/cli.rb:220:in `install'
from c:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.18/lib/bundler/vendor/thor/task.rb:22:in `run'
from c:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.18/lib/bundler/vendor/thor/invocation.rb:118:in `invoke_task'
from c:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.18/lib/bundler/vendor/thor.rb:263:in `dispatch'
来自c：/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.18/lib/bundler/vendor/thor/base.rb:386:in {{1} }”
来自c：/RailsInstaller/Ruby1.9.2/bin/bundle:19:in start'
from c:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.18/bin/bundle:13:in'
不太清楚这里是什么东西，因为我对rails很新...有人建议升级到rails 3.1但是我不想这样做。任何人都可以解决这个问题吗？
提前致谢