"You will then need to link your program to the OpenGL library. Unlike what it does with the headers, SFML can't provide a unified way of linking OpenGL. Therefore, you need to know which library to link to according to what operating system you're using ("opengl32" on Windows, "GL" on Linux, etc.). The same applies for GLU as well in case you plan on using it too: "glu32" on Windows, "GLU" on Linux, etc." and you said "they are part of compiler", so I use mingw, and I cant find anywhere in the compiler folder. Is there any place where I can download? Sorry, if I understand hard, but Im begginer after all.