[planemaniac]

Hi,

I recently started developing programs on OS X using C++ on 10.4.8. I'm not moving onto making a few OpenGL applications, but have hit a hurdle before even starting. I was following the OS X Window tutorial on nehe.gamedev.net and copied all the code in directly, and added the required frameworks (GLUT and OpenGL) using the Add - > Existing Frameworks option under Actions. I then try compiling and I get only one error, which is:


Linking

Undefined Symbols:
_DrawGLScene
_InitGL
_ReSizeGLScene
collect2: ld returned 1 exit status


I have tried using both a Carbon Project and a Cocoa project, both with exactly main.c file:

#include <OpenGL/gl.h>
#include <OpenGL/glu.h>
#include <GLUT/glut.h>

#define kWindowWidth 400
#define kWindowHeight 300

GLvoid InitGL(GLvoid);
GLvoid DrawGLScene(GLvoid);
GLvoid ReSizeGLScene(int Width, int Height);

int main(int argc, char** argv) {
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
glutInitWindowSize (kWindowWidth, kWindowHeight);
glutCreateWindow(argv[0]);

InitGL();

glutDisplayFunc(DrawGLScene);
glutReshapeFunc(ReSizeGLScene);

glutMainLoop();
return 0;

}

Why does this same error keep appearing? I cannot find a solution to it.

Thanks very much,

Regards, George Buckingham

[Thinine]

Try the C++ tool project template.

And I've also heard of the need to include some Cocoa framework or header for all OGL functionality.

[Chuckit]

It looks like you haven't actually defined those functions. Have you?