Added hack for setting WM_CLASS.

README.md

@@ -212,6 +212,7 @@ See the [GLFW documentation](http://www.glfw.org/docs/latest/).
                    been flipped
  - [Cocoa] Bugfix: The `GLFW_KEY_F13` key was reported as
                    `GLFW_KEY_PRINT_SCREEN`
+ - [X11] Added setting of the `WM_CLASS` property to the initial window title
 
 
 ## Contact

src/x11_window.c

@@ -268,6 +268,19 @@ static GLboolean createWindow(_GLFWwindow* window,
         XFree(hints);
     }
 
+    // Set ICCCM WM_CLASS property
+    // HACK: Until a mechanism for specifying the application name is added, the
+    // initial window title is used as the window class name
+    if (strlen(wndconfig->title))
+    {
+        XClassHint* hint = XAllocClassHint();
+        hint->res_name = (char*) wndconfig->title;
+        hint->res_class = (char*) wndconfig->title;
+
+        XSetClassHint(_glfw.x11.display, window->x11.handle, hint);
+        XFree(hint);
+    }
+
     if (_glfw.x11.xi.available)
     {
         // Select for XInput2 events