rails 4 安装gem install mysql 报checking for main() in

1、http://dev.mysql.com/downloads/mysql/ 这个地址下载符合自己系统的mysql installer 2、安装 3、运行 gem install mysql --platform=ruby -- '--with-mysql-lib=C:\mysql-connector-c-6.1.3-winx64\lib --with-mysql-include=C:\mysql-connector-c-6.1.3

1、http://dev.mysql.com/downloads/mysql/  这个地址下载符合自己系统的mysql installer

2、安装

3、运行 gem install mysql --platform=ruby -- '--with-mysql-lib="C:\mysql-connector-c-6.1.3-winx64\lib" --with-mysql-include="C:\mysql-connector-c-6.1.3-winx64\include" --with-mysql-dir="C:\mysql-connector-c-6.1.3-winx64" '

 如果不行，尝试运行 gem install mysql --platform=ruby -- '--with-mysql-dir="C:\mysql-connector-c-6.1.3-winx64"'

get from Moshe Katz's answer  ,link is  http://stackoverflow.com/questions/19014117/ruby-mysql2-gem-installation-on-windows-7