freeglut fails to open display with valgrind
c++, eclipse, glut, opengl, valgrind
Solution
This is my guess: your IDE is probably missing the `$DISPLAY` environment variable. Somewhere you have to configure the environment to set `$DISPLAY` before launching Valgrind.
Launch a terminal and `echo $DISPLAY`. Its value is probably `:0.0`.
In the worst case, I'd try using `setenv()` inside the C code or set DISPLAY in the command line that launches Valgrind (none of these cases was tested, they may not work).
Problem
I'm running the Eclipse IDE on Ubuntu 12.04 with the Valgrind plugin. I've been working on a game in C++ for quite some time, and I seem to have a memory error somewhere. Normally, I trace these with Valgrind. However, glut fails to initialize when I run valgrind. I should note that the game initializes without a problem when I'm not using valgrind. The code for my main function is as follows: ``` int main(int argc, char** argv) { char windowTitle[12] = "Game Window"; printf("Initializing Glut...\n"); glutInit(&argc, argv); printf("Glut initialized!\n"); alutInit(&argc, argv); Game_Object* game = new Game_Object(windowTitle, 1200, 675, argc, argv); delete game; printf("game ended\n"); return 0; } ``` The resulting output to the console is: ``` Initializing Glut freeglut (/home/dsnettleton/Documents/Programming/Eclipse/workspace/Plutoids/Debug/Plutoids): failed to open display '' ``` Obviously, the program isn't getting very far with valgrind running. It's really disheartening to be in such a final stage of my development, only to get stuck trying to weed out a memory error. What might be keeping glut from initializing, and what can I do to fix the problem?