关于ruby：由于缺少libmysql，在Windows上安装mysql-2.9.0 gem失败


Installing mysql-2.9.0 gem on Windows fails due to lack of libmysql

我正在尝试在Windows Server 2003上安装Redmine 2.1.4。要使其正常工作，我需要安装activerecord-mysql-adapter gem，而该gem似乎依赖于mysql-2.9.0.gem。我已经从rubygems下载了后者，然后执行：

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gem install mysql-2.9.0.gem

给出以下输出：

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C:\\>gem install mysql-2.9.0.gem
Temporarily enhancing PATH to include DevKit...
Building native extensions.  This could take a while...
ERROR:  Error installing mysql-2.9.0.gem:
        ERROR: Failed to build gem native extension.

        C:/Ruby193/bin/ruby.exe extconf.rb
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:/Ruby193/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:/Ruby193/lib/ruby/gems/1.9.1/gems/mysql-2.9.0 for inspection.
Results logged to C:/Ruby193/lib/ruby/gems/1.9.1/gems/mysql-2.9.0/ext/mysql_api/gem_make.out

我猜，一种可能是我缺少MySQL C连接器库。我已经从http://dev.mysql.com/downloads/connector/c/下载了mysql-connector-c-6.0.2-win32.msi和mysql-connector-c-6.0.2-win32-vs2005.msi，但是两个安装程序都退出了：
enter

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C:\\>gem install mysql-2.9.0.gem --platform=ruby --with-opt-lib="C:/Program Files/MySQL/MySQL Server 5.1/lib" --with-opt-include="C:/Program Files/MySQL/MySQL Server 5.1/include"

也不起作用(可能是因为路径中有空格)。

相关讨论

尝试从http://dev.mysql.com/downloads/connector/c/使用没有安装程序版本的连接器，并从根文件夹或没有足够空间的文件夹路径中提取内容，然后尝试安装mysql gem

示例

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gem install mysql --platform=ruby -- --with-mysql-dir=C:/mysql-connector-c-noinstall-6.0.2-win32
相关讨论

我已经发布了带有ruby和x86-mingw32预编译二进制文件的mysql gem版本2.9.0。

如果让RubyGems确定正确的平台，它将自动为您安装x86-mingw32平台gem，从而避免了编译过程。

安装后，它将向您显示一组说明，指示您下载MySQL Connector / C并将其DLL放在正确的位置：

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C:\\Users\\Luis>gem install mysql
Fetching: mysql-2.9.0-x86-mingw32.gem (100%)

======================================================================================================

  You've installed the binary version of mysql.
  It was built using MySQL Connector/C version 6.0.2.
  It's recommended to use the exact same version to avoid potential issues.

  At the time of building this gem, the necessary DLL files where available
  in the following URL:

  http://dev.mysql.com/get/Downloads/Connector-C/mysql-connector-c-noinstall-6.0.2-win32.zip/from/pick

  You can put the lib\\libmysql.dll available in this package to your Ruby bin directory.
  E.g. C:\
uby\\bin

======================================================================================================

Successfully installed mysql-2.9.0-x86-mingw32
1 gem installed

如果仅需要连接到已经运行的MySQL版本，则无需下载或安装MySQL。

RubyGems和Bundler都将自动检测正确的平台并安装正确的预编译二进制文件，而无需自己编译它们。

如果您位于代理后面，请使用gem install的--http-proxy参数(请参阅帮助)或设置HTTP_PROXY环境变量。

希望有帮助。