+ override_extensions_in_context(ctx);
+
+ if (cant_disable_extensions != NULL) {
+ _mesa_problem(ctx,
+ "Trying to disable permanently enabled extensions: %s",
+ cant_disable_extensions);
+ }
+
+ if (extra_extensions == NULL) {
+ return calloc(1, sizeof(char));
+ } else {
+ _mesa_problem(ctx, "Trying to enable unknown extensions: %s",
+ extra_extensions);
+ return strdup(extra_extensions);
+ }
+}
+
+
+/**
+ * \brief Free extra_extensions and cant_disable_extensions strings
+ *
+ * These strings are allocated early during the first context creation by
+ * _mesa_one_time_init_extension_overrides.
+ */
+static void
+free_unknown_extensions_strings(void)
+{
+ free(extra_extensions);
+ free(cant_disable_extensions);
+}
+
+
+/**
+ * \brief Initialize extension override tables.
+ *
+ * This should be called one time early during first context initialization.
+ */
+void
+_mesa_one_time_init_extension_overrides(void)
+{
+ const char *env_const = getenv("MESA_EXTENSION_OVERRIDE");