$NetBSD: patch-config.h.in,v 1.1 2018/01/31 12:55:29 jperkin Exp $

Don't break std::mktime.

--- config.h.in.orig	2009-08-11 15:05:50.000000000 +0000
+++ config.h.in
@@ -957,7 +957,9 @@
 #undef mbstate_t
 
 /* Define to rpl_mktime if the replacement function should be used. */
+#if !defined(__cplusplus)
 #undef mktime
+#endif
 
 /* Define to the type of st_nlink in struct stat, or a supertype. */
 #undef nlink_t