+ /* Undefine this in case the configure-time putenv test has defined it
+ to something else. The use we make of this function here doesn't
+ require the added functionality of the replacement one. */
+#undef putenv
+
+ /* This is necessary to make strftime give consistent zone strings and
+ e.g., seconds since the epoch (%s). */
+ putenv ("TZ=GMT0");
+