+/* Many wchar functions (and also strnlen(), for some reason) are only
+ available since 10.7 so don't use them if we want to build the applications
+ that would run under 10.6 and earlier. */
+#if MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_7
+#define HAVE_STRNLEN 1
+#define HAVE_WCSDUP 1
+#define HAVE_WCSNLEN 1
+#define HAVE_WCSCASECMP 1
+#define HAVE_WCSNCASECMP 1
+#endif
+