相关疑难解决方法(0)

我正在使用Fedora 14,我安装并运行了MySQL和MySQL服务器5.1.42.现在我尝试以root用户身份执行此操作:

gem install mysql

但我得到这个错误:

Building native extensions.  This could take a while...
ERROR:  Error installing mysql:
    ERROR: Failed to build gem native extension.

/usr/bin/ruby extconf.rb
mkmf.rb can't find header files for ruby at /usr/lib/ruby/ruby.h


Gem files will remain installed in /usr/lib/ruby/gems/1.8/gems/mysql-2.8.1 for inspection.
Results logged to /usr/lib/ruby/gems/1.8/gems/mysql-2.8.1/ext/mysql_api/gem_make.out

这有什么不对？在安装ruby 1.8.7.和最新的rubygems 1.3.7.

我无法安装eventmachine

好的,我知道这已被问了很多,但到目前为止我找不到任何解决方案帮助了我.所以我作为最后的手段在这里发布.

我使用( windows 8 x64通过ruby 2.0.0p195 (x64)Ruby Installer for Windows安装适当的Devkit)

所以错误是

    Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension
C:/Ruby200-x64/bin/ruby.exe extconf.rb
checking for main() in -lssl... no
checking for rb_trap_immediate in ruby.h,rubysig.h... no
checking for rb_thread_blocking_region()... yes
checking for inotify_init() in sys/inotify.h... no
checking for __NR_inotify_init in sys/syscall.h... no
checking for writev() in sys/uio.h... no
checking for rb_wait_for_single_fd()... yes
checking for rb_enable_interrupt()... no
checking for rb_time_new()... yes
checking for windows.h... yes
checking for winsock.h... …

更新:

eventmachine gem已安装在我的gemfile中:

 eventmachine (1.0.0, 0.12.10)

请帮忙!尝试使用以下内容创建数据库:

Fitzs-MacBook-Pro:twilio_insanity Fitz$ rake db:create'

返回以下错误:

无法加载EventMachine C扩展; 要使用纯红宝石反应器,需要'em/pure_ruby'耙子中止!无法加载这样的文件 - ruby​​eventmachine /Users/Fitz/.rvm/gems/ruby-1.9.3-p327@rails3tutorial2ndEd/gems/eventmachine-1.0.0/lib/eventmachine.rb:8:in'/ require' /Users/Fitz/.rvm/gems/ruby-1.9.3-p327@rails3tutorial2ndEd/gems/eventmachine-1.0.0/lib/eventmachine.rb:8:in Users/Fitz/.rvm/gems/ruby​​-1.9.3-p327 @ rails3tutorial2ndEd/gems/thin-1.5.0/lib/thin.rb:7:in require' /Users/Fitz/.rvm/gems/ruby-1.9.3-p327@rails3tutorial2ndEd/gems/thin-1.5.0/lib/thin.rb:7:in ' /Users/Fitz/.rvm/gems/ruby-1.9.3- p327 @ global/gems/bundler-1.2.3/lib/bundler/runtime.rb:68:in require' /Users/Fitz/.rvm/gems/ruby-1.9.3-p327@global/gems/bundler-1.2.3/lib/bundler/runtime.rb:68:in block(2 levels)in require'/Users/Fitz/.rvm/gems/ruby-1.9.3-p327@global/ gems/bundler-1.2.3/lib/bundler/runtime.rb:66:在each' /Users/Fitz/.rvm/gems/ruby-1.9.3-p327@global/gems/bundler-1.2.3/lib/bundler/runtime.rb:66:in require'/Users/Fitz/.rvm/gems/ruby-1.9.3-p327@global/gems/bundler-1.2.3 中的 块中/lib/bundler/runtime.rb:55:in each' /Users/Fitz/.rvm/gems/ruby-1.9.3-p327@global/gems/bundler-1.2.3/lib/bundler/runtime.rb:55:in require'/Users/Fitz/.rvm/gems/ruby-1.9.3-p327@global/gems/bundler-1.2.3/lib/bundler.rb:128:在 require' /Users/Fitz/Desktop/twilio_insanity/config/application.rb:7:in'/用户/菲茨/桌面/ twilio_insanity/Rake文件:5: require' /Users/Fitz/Desktop/twilio_insanity/Rakefile:5:in' /Users/Fitz/.rvm/gems/ruby-1.9.3-p327@rails3tutorial2ndEd/bin/ruby_noexec_wrapper:14:in eval' /Users/Fitz/.rvm/gems/ruby-1.9.3-p327@rails3tutorial2ndEd/bin/ruby_noexec_wrapper:14:in "(见完整跟踪使用--trace运行任务

```

我遇到了麻烦，在Rails项目中？redmine2.3），rails版本是3.2

开始项目

bundle exec thin start -p 8080 -e production -s 5 -d

错误信息

(eval):9: warning: already initialized constant Bundler::Dsl::RAILS_VERSION_IS_3
(eval):9: warning: previous definition of RAILS_VERSION_IS_3 was here
(eval):9: warning: already initialized constant Bundler::Dsl::RAILS_VERSION_IS_3
(eval):9: warning: previous definition of RAILS_VERSION_IS_3 was here
Unable to load the EventMachine C extension; To use the pure-ruby reactor, require 'em/pure_ruby'
/var/wtn/vendor/cache/ruby/2.0.0/gems/eventmachine-1.0.3/lib/eventmachine.rb:8:in `require': libruby.so.2.0: cannot open shared object file: No such file or directory - /var/wtn/vendor/cache/ruby/2.0.0/gems/eventmachine-1.0.3/lib/rubyeventmachine.so (LoadError)
    from /var/wtn/vendor/cache/ruby/2.0.0/gems/eventmachine-1.0.3/lib/eventmachine.rb:8:in `<top (required)>'
    from /var/wtn/vendor/cache/ruby/2.0.0/gems/thin-1.6.2/lib/thin.rb:7:in `require'
    from …