Mine

#include <cstdio>#include <GL/glx.h>int main() {	int attrib[10] = {GLX_RED_SIZE, 5, GLX_GREEN_SIZE, 5, GLX_BLUE_SIZE, 5, None};	int a;	Display *d = XOpenDisplay(NULL);	GLXFBConfig *fb = glXChooseFBConfig(d, 0, attrib, &a);	if (!fb) {		printf("Dammit\n");	}	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 1024, 512, 0, GL_BGRA, GL_UNSIGNED_BYTE, 0);	GLenum err = glGetError();	if (err == GL_INVALID_VALUE) {		printf("Crap\n");	}}