#define GL_GLEXT_PROTOTYPES
#include <GL/glut.h>

static const GLchar *source[] = {
	"#version 120\n",
	"void main() {\n",
	"  discard;\n",
	"}\n",
};

int main(int argc, char **argv){
	GLuint shader, program;

	glutInit(&argc, argv);
	glutInitDisplayMode(GLUT_RGB);
	glutCreateWindow(argv[0]);

	shader = glCreateShader(GL_FRAGMENT_SHADER);
	glShaderSource(shader, sizeof(source) / sizeof(source[0]),
		source, NULL);
	glCompileShader(shader);

	program = glCreateProgram();
	glAttachShader(program, shader);
	glLinkProgram(program);
	glUseProgram(program);

	glBegin(GL_POINTS);
	glVertex2f(0, 0);
	glEnd();
	glFinish();

	return 0;
}