pkgs/development/libraries/qt-5/5.4/qtbase/dlopen-gl.patch


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Index: qt-everywhere-opensource-src-5.4.2/qtbase/src/plugins/platforms/xcb/qglxintegration.cpp
===================================================================
--- qt-everywhere-opensource-src-5.4.2.orig/qtbase/src/plugins/platforms/xcb/qglxintegration.cpp
+++ qt-everywhere-opensource-src-5.4.2/qtbase/src/plugins/platforms/xcb/qglxintegration.cpp
@@ -560,7 +560,12 @@ void (*QGLXContext::getProcAddress(const
             {
                 extern const QString qt_gl_library_name();
 //                QLibrary lib(qt_gl_library_name());
+                // Check system library paths first
                 QLibrary lib(QLatin1String("GL"));
+                if (!lib.load()) {
+                    // Fallback to Mesa driver
+                    lib.setFileName(QLatin1String("@mesa_lib@/lib/libGL"));
+                }
                 glXGetProcAddressARB = (qt_glXGetProcAddressARB) lib.resolve("glXGetProcAddressARB");
             }
         }