X-Git-Url: https://git.cworth.org/git?a=blobdiff_plain;f=glws_glx.cpp;h=64f8ce129a41089a75f702c39b6f0359533171d8;hb=e4397f1fb5fd49d6d3fbefc31aa3f11eb3ae312d;hp=661e77db4ae1b0a874329fd909126baa58433ade;hpb=cefdd197f2f20d8afdbcac6e93680ac9aa8c0351;p=apitrace

diff --git a/glws_glx.cpp b/glws_glx.cpp
index 661e77d..64f8ce1 100644
--- a/glws_glx.cpp
+++ b/glws_glx.cpp
@@ -23,6 +23,9 @@
  *
  **************************************************************************/
 
+#include <stdlib.h>
+#include <iostream>
+
 #include "glimports.hpp"
 #include "glws.hpp"
 
@@ -102,6 +105,10 @@ private:
 public:
     GlxWindowSystem() {
         display = XOpenDisplay(NULL);
+	if (!display) {
+            std::cerr << "error: unable to open display " << XDisplayName(NULL) << "\n";
+            exit(1);
+        }
         screen = DefaultScreen(display);
     }