DashGL

First of all, we want to make sure that our GTK library is installed and working. So we start off opening a window.

#include <gtk/gtk.h>

int main(int argc, char *argv[]) {

    GtkWidget *window;

    gtk_init(&argc, &argv);

    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_window_set_title(GTK_WINDOW(window), "Invaders Tutorial");
    gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
    gtk_window_set_default_size(GTK_WINDOW(window), 640, 480);
    gtk_window_set_type_hint(GTK_WINDOW(window), GDK_WINDOW_TYPE_HINT_UTILITY);
    g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);

    gtk_widget_show_all(window);

    gtk_main();

    return 0;

}

Compile:

$ gcc `pkg-config --cflags gtk+-3.0` main.c `pkg-config --libs gtk+-3.0`

Run:

$ ./a.out