$OpenBSD: patch-gcc_system_h,v 1.1 2018/09/13 11:13:00 jasper Exp $

fix build with libc++
https://svnweb.freebsd.org/ports/head/devel/avr-gcc/files/patch-libc%2B%2B?revision=435893&view=markup

Index: gcc/system.h
--- gcc/system.h.orig
+++ gcc/system.h
@@ -217,6 +217,7 @@ extern int errno;
 #ifdef __cplusplus
 # include <algorithm>
 # include <cstring>
+# include <new>
 # include <utility>
 #endif
 
