how to build a cgal program in qt under ubuntu

when you create a new project, don't forget to add the following sentence in .pro file

LIBS += -lCGAL -lCGAL_Core

it will  remind the system to link CGAL library.

TEMPLATE = app

CONFIG += console c++11

CONFIG -= app_bundle

CONFIG -= qt

SOURCES += main.cpp

LIBS += -lCGAL -lCGAL_Core

Then you can paste the source code you want in CGAL library into main.cpp, then change it  as you like.