Windows 7的mysql2宝石错误

Question

我在Windows 7上运行 铁轨所以我本来有一个错误，说：

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 

我再通过计算器去，看到解决这个问题，我需要做的只是宝石安装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可以做的伎俩。