在我的Ubuntu15.04上要学习下C++图形，安装FLTK库，下载了fltk-1.3.3文件，编译中报：Configure could not find required X11 libraries
网上查到以下办法：出处Ubuntu Forums
FLTK is in the ubuntu repositories, unless you have reasons not to, you can install it (I assume you mean the development libraries) with:
sudo apt-get install libfltk1.3-dev
If you do have a reason (i.e. you're a FLTK developer), you probably want one of the X libraries, I think libx11-dev:
sudo apt-get install libx11-dev
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