g++ linking command line
-o runmaze
Call the output file ‘runmaze’ (instead of a.out, which is the
default)
-g
Include debugging information, so you can use a debugger
-L/usr/X11R6/lib -lX11
Include X-Windows libraries (for visualization part)
   g++ -o runmaze -g runmaze.o
MazeRunner.o RandomMazeRunner.o Maze.o
SquareMaze.o VisualizeSquareMazeRunner.o
GPKernel.o -L/usr/X11R6/lib -lX11