Ubuntu下執行gem install mysql遇到的問題以及解決方法

sudo gem install mysql

Then get something beautiful like:

ERROR:  While executing gem ... (RuntimeError)

ERROR: Failed to build gem native extension.

Gem files will remain installed in /usr/lib/ruby/gems/1.8/gems/mysql-2.7 for inspection.

開始以為是沒有make編譯環境所造成的，結果安裝了編譯環境還是出同樣的錯誤。

正确的解決方案：

sudo apt-get install libmysqlclient5-dev