#define TEX_SIZE	512

#define CHECK_FRAMEBUFFER_STATUS() 
{ 
	GLenum status; 
	status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT); 
	switch(status) { 
		case GL_FRAMEBUFFER_COMPLETE_EXT: 
		std::cout << "Framebuffer status = complete" << std::endl; 
			break; 
		case GL_FRAMEBUFFER_UNSUPPORTED_EXT: 
		std::cout << "Framebuffer status = UNSUPPORTED" << std::endl; 
			break; 
		case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT: 
		std::cout << "Framebuffer status = GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT" << std::endl; 
			break; 
		case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT: 
		std::cout << "Framebuffer status = GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT" << std::endl; 
			break; 
		case GL_FRAMEBUFFER_INCOMPLETE_DUPLICATE_ATTACHMENT_EXT: 
		std::cout << "Framebuffer status = GL_FRAMEBUFFER_INCOMPLETE_DUPLICATE_ATTACHMENT_EXT" << std::endl; 
			break; 
		case GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT: 
		std::cout << "Framebuffer status = GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT" << std::endl; 
			break; 
		case GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT: 
		std::cout << "Framebuffer status = GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT" << std::endl; 
			break; 
		case GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT: 
		std::cout << "Framebuffer status = GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT" << std::endl; 
			break; 
		case GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT: 
		std::cout << "Framebuffer status = GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT" << std::endl; 
			break; 
		default: 
		printf ("return == 0x%x\n", status); 
			/* programming error; will fail on all hardware */
			assert(0); 
	} 
}

(The above source has the backslashes after each line, but it doesn't work with the source tag properly so I removed them)

...

	GLuint fb, depth_rb, tex;
	
	// create objects
	glGenFramebuffersEXT(1, &fb); // frame buffer
	glGenRenderbuffersEXT(1, &depth_rb); // render buffer
	glGenTextures(1, &tex); // texture
	
	glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
	
	// initialize texture
	glBindTexture(GL_TEXTURE_2D, tex);
	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, TEX_SIZE, TEX_SIZE, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
	
	// (set texture parameters here)
	// attach texture to framebuffercolor buffer
	glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, tex, 0);

	// initialize depth renderbuffer
	glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, depth_rb);
	glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT24, TEX_SIZE, TEX_SIZE);
	
	// attach renderbuffer to framebuffer depth buffer
	glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, depth_rb);

	CHECK_FRAMEBUFFER_STATUS();