摘要： 今天更新redmine的时候，需要安装mysql gem包。结果一直报错：Building native extensions. This could take a while...ERROR: Error installing mysql: ERROR: Failed to build gem native extension. /usr/bin/ruby1.8 extconf.rb --with-mysql-config=/usr/local/mysql/bin/mysql_configextconf.rb:10: command not found: /usr/l... 阅读全文