We are trying to get Open GL / GLUT working, but are not having success with either. We are attempting to create a simple ploygon (a triangle), but get a bunch of undefined reference errors.
the following is our code:
#include <GL/gl.h>
#include <GL/glut.h>
#include <stdlib.h>
void init(void){
glClearColor(0.0, 0.0, 0.0, 0.0);
}
void display(void) {
glColor3f(1.0,1.0,1.0);
glBegin(GL_POLYGON);
glVertex2f(0.0,0.0);
glVertex2f(1.0,0.0);
glVertex2f(0.0,1.0);
glEnd();
}
int main(int argc, char** argv) {
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
glutInitWindowSize(400,150);
glutInitWindowPosition(100, 100);
glutCreateWindow(argv[0]);
init();
glutDisplayFunc(display);
glutMainLoop();
return 0;
}
and here are the error messages:
[clio@babbage 3D]$ gcc poly.c
/tmp/ccM3hqwK.o: In function init': /tmp/ccM3hqwK.o(.text+0xf): undefined reference to glClearColor’
/tmp/ccM3hqwK.o: In function display': /tmp/ccM3hqwK.o(.text+0x31): undefined reference to glColor3f’
/tmp/ccM3hqwK.o(.text+0x3e): undefined reference to glBegin' /tmp/ccM3hqwK.o(.text+0x4d): undefined reference to glVertex2f’
/tmp/ccM3hqwK.o(.text+0x5f): undefined reference to glVertex2f' /tmp/ccM3hqwK.o(.text+0x71): undefined reference to glVertex2f’
/tmp/ccM3hqwK.o(.text+0x79): undefined reference to glEnd' /tmp/ccM3hqwK.o: In function main’:
/tmp/ccM3hqwK.o(.text+0x93): undefined reference to glutInit' /tmp/ccM3hqwK.o(.text+0xa0): undefined reference to glutInitDisplayMode’
/tmp/ccM3hqwK.o(.text+0xb5): undefined reference to glutInitWindowSize' /tmp/ccM3hqwK.o(.text+0xc4): undefined reference to glutInitWindowPosition’
/tmp/ccM3hqwK.o(.text+0xd4): undefined reference to glutCreateWindow' /tmp/ccM3hqwK.o(.text+0xe9): undefined reference to glutDisplayFunc’
/tmp/ccM3hqwK.o(.text+0xf1): undefined reference to `glutMainLoop’
collect2: ld returned 1 exit status
If anyone could give us a hand, that would be great.
ciao
joe