我在安装时收到以下错误信息,让我知道如果我需要发布更多的细节.
我遵循以下位置的指示：
https://github.com/oneclick/rubyinstaller/wiki/Development-Kit
我使用的是ruby 1.9.2p136(2010-12-25)[i386-mingw32].
这是我得到的：
E:\work_desk\trunk>gem install MysqL2 -v 0.2.4 Temporarily enhancing PATH to include DevKit... Building native extensions. This could take a while... ERROR: Error installing MysqL2: ERROR: Failed to build gem native extension. C:/Ruby192/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:/Ruby192/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:/Ruby192/lib/ruby/gems/1.9.1/gems/MysqL2-0. 2.4 for inspection. Results logged to C:/Ruby192/lib/ruby/gems/1.9.1/gems/MysqL2-0.2.4/ext/MysqL2/ge m_make.out
解决方法
您要安装的特定版本的MysqL2 gem(0.2.4)不仅缺少Windows的二进制文件,而且在Windows上有问题.
请安装MysqL2 gem而不指示版本：
gem install MysqL2
哪个将安装最新版本(在我发布时为0.2.6),并且还提供了跳过编译步骤的Windows的二进制文件.
如果您仍然希望强制编译(因为您的MysqL版本与用于生成二进制gem的版本不同),则需要从RubyInstaller网站安装RubyInstaller的DevKit：
http://rubyinstaller.org/downloads
并从维基(从下载页面链接)的DevKit installation instructions
您将需要在gem安装过程中为头文件和库提供路径,并从以下说明中调整MysqL安装位置：
subst X: "C:\Program Files (x86)\MysqL\MysqL Server 5.1" gem install MysqL2 --platform=ruby -- --with-MysqL-dir=X: --with-MysqL-lib=X:\lib\opt subst X: /D
上面的命令使用subst来避免使用空格的路径问题,你应该总是避免.
希望这可以帮助.