libgif-dev : Depends: libgif4 (= 4.1.6-11) but 4.1.6-11ubuntu0.14.04.1 is to be installed
在Ubuntu上安装依赖项时有时会出现这样的错误: libgif-dev : Depends: libgif4 (= 4.1.6-11) but 4.1.6-11ubuntu0.14.04.1 is to be installed E: Unable to correct problems, you have held broken packages. 意思是你要安装的libgif-dev库需要一