Windows 7 mysql2 gem错误

Question

我在Windows 7上运行rails。 所以我最初得到的错误是：

 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

然后我通过stackoverflow看到了解决这个问题，我需要做一下gem install mysql2。我这样做但现在得到这个错误：

gem install mysql2

ERROR: while executing gem... (NameError)
uinitialized constant Psyck::Syck

Answer 1

使用gem install mysql2 -v 0.3.9可以解决问题。