--- smartmontools-6.4/regex/regex.h.cplus	2012-12-13 18:23:06.000000000 +0100
+++ smartmontools-6.4/regex/regex.h	2016-02-19 22:42:53.390013000 +0100
@@ -536,7 +536,7 @@
 #endif
 /* gcc 3.1 and up support the [restrict] syntax.  */
 #ifndef __restrict_arr
-# if (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1)) && !defined(__WIN32__)
+# if (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1)) && !defined(__WIN32__) && !defined(__cplusplus)
 #  define __restrict_arr __restrict
 # else
 #  define __restrict_arr