diff --git a/lang/gcc6-aux/files/patch-gcc_system.h b/lang/gcc6-aux/files/patch-gcc_system.h
new file mode 100644
index 000000000000..5321e3814c0f
--- /dev/null
+++ b/lang/gcc6-aux/files/patch-gcc_system.h
@@ -0,0 +1,42 @@
+--- gcc/system.h.orig	2016-04-22 11:09:22 UTC
++++ gcc/system.h
+@@ -203,19 +203,6 @@ extern int fprintf_unlocked (FILE *, const char *, ...
+ #endif
+ #endif
+ 
+-/* There are an extraordinary number of issues with <ctype.h>.
+-   The last straw is that it varies with the locale.  Use libiberty's
+-   replacement instead.  */
+-#include "safe-ctype.h"
+-
+-#include <sys/types.h>
+-
+-#include <errno.h>
+-
+-#if !defined (errno) && defined (HAVE_DECL_ERRNO) && !HAVE_DECL_ERRNO
+-extern int errno;
+-#endif
+-
+ #ifdef __cplusplus
+ #if defined (INCLUDE_ALGORITHM) || !defined (HAVE_SWAP_IN_UTILITY)
+ # include <algorithm>
+@@ -235,6 +222,19 @@ extern int errno;
+ # include <cstring>
+ # include <new>
+ # include <utility>
++#endif
++
++/* There are an extraordinary number of issues with <ctype.h>.
++   The last straw is that it varies with the locale.  Use libiberty's
++   replacement instead.  */
++#include "safe-ctype.h"
++
++#include <sys/types.h>
++
++#include <errno.h>
++
++#if !defined (errno) && defined (HAVE_DECL_ERRNO) && !HAVE_DECL_ERRNO
++extern int errno;
+ #endif
+ 
+ /* Some of glibc's string inlines cause warnings.  Plus we'd rather