Question

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

当我尝试安装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。以下是更新的答案：How to use "mysql2" gem in Rails 3 application on Windows 7?

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 - 或者使用sqlite进行本地开发。

这是来自googlegroups讨论

块引用嘿二万，已经有关于Win32支持的mysql2问题跟踪器的票证在http://github.com/brianmario/mysql2/issues#issue/8。你可以关注它的进步;我正在尽我所能让事情顺利进行你们。坚持下去！ :)

Answer 3

仅供记录：问题应该解决！

mysql2 gem v.0.2.6已经出局，有win32支持。

gem install mysql2现在没有问题。

请参阅：http://github.com/brianmario/mysql2/issues/issue/8#issue/8/comment/479748

Answer 4

它有效， C：GT; gem install mysql2 - ' - with-mysql-lib =“C：\ Prog ram Files \ MySQL \ MySQL Connector C 6.0.2 \ lib \ opt“--with-mysql-include =”C：\ Progra m Files \ MySQL \ MySQL Connector C 6.0.2 \ include“'

暂时增强PATH以包含DevKit ......

构建原生扩展。这可能需要一段时间......

成功安装了mysql2-0.3.6

安装了1个宝石

为mysql2-0.3.6安装ri文档...

为类未知的

类封闭类/模块'mMysql2'

为mysql2-0.3.6安装RDoc文档...

为类未知的

类封闭类/模块'mMysql2'

注意：

予。如果你的mysql中没有lib和include目录，那么安装mysql连接器c

II。首先安装 DevKit ，然后只能在windows中安装mysql2插件 https://github.com/oneclick/rubyinstaller/wiki/Development-Kit

Answer 5

您是否正确安装了DevKit？如有疑问，请交叉检查安装步骤 - http://rorguide.blogspot.com/2011/03/installing-mysql2-gem-on-ruby-192-and.html

按照这些步骤后，我能够安装mysql2 gem。

Answer 6

在Cygwin下，我必须确保不仅安装libmysqlclient18，还安装libmysqlclient-devel。然后“gem install mysql2”就好了。

当然，Cygwin中还有一个ruby-mysql2包。

Answer 7

你可以尝试

gem install mysql2 -v '0.0.00' -- --with-ldflags=-L/usr/local/opt/openssl/lib --with-cppflags=-I/usr/local/opt/openssl/include

Answer 8

键：表示您必须先安装开发工具的行。 ref：devkit

Answer 9

使用

gem install mysql

对于windows，直到mysql2正确。

Ruby gem mysql2安装错误

9 个答案: