Ruby gem mysql2安装错误

Question

我在Windows7中安装了Ruby版本ruby 1.9.2p0(2010-08-18)[i386-mingw32].和宝石vesion 1.3.7

当我试图安装mysql gem时,它显示Failed to build gem native extension错误,为什么会这样？我的mysql版本是5.1.36(WampServer)

E:\RubyApps\test_app2>gem install mysql2
Building native extensions.  This could take a while...
ERROR:  Error installing mysql2:
        ERROR: Failed to build gem native extension.

E:/Ruby192/bin/ruby.exe extconf.rb
checking for rb_thread_blocking_region()... *** 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=E:/Ruby192/bin/ruby
E:/Ruby192/lib/ruby/1.9.1/mkmf.rb:368:in `try_do': The complier failed to genera
te an executable file. (RuntimeError)
You have to install development tools first.
        from E:/Ruby192/lib/ruby/1.9.1/mkmf.rb:435:in `try_link0'
        from E:/Ruby192/lib/ruby/1.9.1/mkmf.rb:440:in `try_link'
        from E:/Ruby192/lib/ruby/1.9.1/mkmf.rb:552:in `try_func'
        from E:/Ruby192/lib/ruby/1.9.1/mkmf.rb:797:in `block in have_func'
        from E:/Ruby192/lib/ruby/1.9.1/mkmf.rb:693:in `block in checking_for'
        from E:/Ruby192/lib/ruby/1.9.1/mkmf.rb:280:in `block (2 levels) in postp
one'
        from E:/Ruby192/lib/ruby/1.9.1/mkmf.rb:254:in `open'
        from E:/Ruby192/lib/ruby/1.9.1/mkmf.rb:280:in `block in postpone'
        from E:/Ruby192/lib/ruby/1.9.1/mkmf.rb:254:in `open'
        from E:/Ruby192/lib/ruby/1.9.1/mkmf.rb:276:in `postpone'
        from E:/Ruby192/lib/ruby/1.9.1/mkmf.rb:692:in `checking_for'
        from E:/Ruby192/lib/ruby/1.9.1/mkmf.rb:796:in `have_func'
        from extconf.rb:9:in `<main>'


Gem files will remain installed in E:/Ruby192/lib/ruby/gems/1.9.1/gems/mysql2-0.
2.3 for inspection.
Results logged to E:/Ruby192/lib/ruby/gems/1.9.1/gems/mysql2-0.2.3/ext/mysql2/ge
m_make.out

E:\RubyApps\test_app2>

Answer 1

如果你在Linux中遇到同样的问题,基本上你只需要先安装几个库.这对我有用.

> sudo apt-get install libmysql-ruby libmysqlclient-dev

> gem install mysql

来源:http://heatware.net/ruby-rails/solved-installing-mysql-gem-extconf-rb-failed-error/

Answer 2

由于这一结果不断出现在google上,我应该指出这个答案来自差不多2年前.这是一个更新的答案:如何在Windows 7上的Rails 3应用程序中使用"mysql2"gem？

根据开发人员的说法,已经有一个已报告的错误,他正在努力将mysql2分离到Windows.截至目前 - 它仍在进行中.现在使用旧的mysql驱动程序 - 或使用sqlite进行本地开发.

这是来自googlegroups的讨论

Blockquote Hey Erwann,已经在http://github.com/brianmario/mysql2/issues#issue/8上找到了Win32支持的mysql2问题跟踪器.你可以跟着它进步; 我正在尽我所能让你们顺利地工作.坚持下去!:)