Basic skeleton for a C OpenGL program on OSX

What's the bare skeleton to get a triangle drawn on an OpenGL window in C on OSX? I've gone through the tutorials at Nehe and tried to get it working, but the CreateGLWindow seems hopelessly tied to win32.

I want to stick to just opengl and glut, etc. I'll be eventually wrapping this in scheme, but I'd like to have a firmer understanding at the c-level beforehand.

Here's what I have thus far:

#include <OpenGL/gl.h>// Header File For The OpenGL32 Library
#include <OpenGL/glu.h>// Header File For The GLu32 Library
#include <GLUT/glut.h>// Header File For The GLut Library

#define kWindowWidth 400;
#define kWindowHeight 300;

HGLRC hRC=NULL;// Permanent Rendering Context
HDC             hDC=NULL;// Private GDI Device Context
HWND            hWnd=NULL;// Holds Our Window Handle
HINSTANCE       hInstance;// Holds The Instance Of The Application

LRESULTCALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);// Declaration For WndProc

boolkeys[256];// Array Used For The Keyboard Routine
boolactive=TRUE;// Window Active Flag Set To TRUE By Default
boolfullscreen=TRUE;// Fullscreen Flag Set To Fullscreen Mode By Default

GLvoid ReSizeGLScene(GLsizei width, GLsizei height)// Resize And Initialize The GL Window
{
  if (height==0)// Prevent A Divide By Zero By
    {
      height=1;// Making Height Equal One
    }

  glViewport(0, 0, width, height);// Reset The Current Viewport
  glMatrixMode(GL_PROJECTION);// Select The Projection Matrix
  glLoadIdentity();// Reset The Projection Matrix

  // Calculate The Aspect Ratio Of The Window
  gluPerspective(45.0f,(GLfloat)width/(GLfloat)height,0.1f,100.0f);

  glMatrixMode(GL_MODELVIEW);// Select The Modelview Matrix
  glLoadIdentity();// Reset The Modelview Matrix
}

int InitGL(GLvoid)// All Setup For OpenGL Goes Here
{
  glShadeModel(GL_SMOOTH);// Enables Smooth Shading
  glClearColor(0.0f, 0.0f, 0.0f, 0.0f);// Black Background
  glClearDepth(1.0f);// Depth Buffer Setup
  glEnable(GL_DEPTH_