我的程序是这个西尔宾斯基垫片。我在我的MacBook Pro上使用NetBeans，我相信我已经安装了库，但可能它们没有正确链接。

# include <iostream>

# include <stdio.h>

# include <OpenGL/gl.h>

# include <OpenGL/glu.h>

# include <GLUT/glut.h>

# include <OpenGL/glext.h>

void myinit(){
    glClearColor(1.0,1.0,1.0,1.0);
    glColor3f(1.0,0.0,0.0);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluOrtho2D(0.0,50.0,0.0,50.0);
    glMatrixMode(GL_MODELVIEW);
}

void display(){
    GLfloat vertices[3][2]={{0.0,0.0},{25.0,50.0},{50.0,0.0}};
    int i, j, k;
    int rand();
    GLfloat p[2]={7.5,5.0};
    glClear(GL_COLOR_BUFFER_BIT);
    glBegin(GL_POINTS);

    for(k=0; k<5000; k++){
        j=rand()*3;
        p[0]=(p[0]+vertices[j][0])/2.0;
        p[1]=(p[1]+vertices[j][1])/2.0;
        glVertex2fv(p);
    }

    glEnd();
    glFlush();
}

int main(int argc, char**argv) {
    glutInit(&argc,argv);
    glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
    glutInitWindowSize(500,500);
    glutInitWindowPosition(0,0);
    glutCreateWindow("Sierpinski Gasket");
    glutDisplayFunc(display);
    myinit();
    glutMainLoop();
}

以下是编译错误：

Undefined symbols for architecture x86_64:
  "_glutInit", referenced from:
      _main in main.o
  "_glutInitDisplayMode", referenced from:
      _main in main.o
  "_glutInitWindowSize", referenced from:
      _main in main.o
  "_glutInitWindowPosition", referenced from:
      _main in main.o
  "_glutCreateWindow", referenced from:
      _main in main.o
  "_glutDisplayFunc", referenced from:
      _main in main.o
  "_glutMainLoop", referenced from:
      _main in main.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status
make[2]:***[dist/Debug/GNU-MacOSX/sierpinski] Error 1
make[1]:***[.build-conf] Error 2
make:***[.build-impl] Error 2