[PATCH 5/7] Optional struct _reent::_new::_unused

Provide struct _reent::_new::_unused only if _NEWLIB_BACKWARD_BINARY_COMPAT is
defined.
---
 newlib/libc/include/sys/reent.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/newlib/libc/include/sys/reent.h b/newlib/libc/include/sys/reent.h
index 96fa94bd7..5e154cae8 100644
--- a/newlib/libc/include/sys/reent.h
+++ b/newlib/libc/include/sys/reent.h
@@ -687,6 +687,7 @@ struct _reent
           _mbstate_t _wcsrtombs_state;
 	  int _h_errno;
         } _reent;
+#ifdef _NEWLIB_BACKWARD_BINARY_COMPAT
   /* Two next two fields were once used by malloc.  They are no longer
      used. They are used to preserve the space used before so as to
      allow addition of new reent fields and keep binary compatibility.   */
@@ -696,6 +697,7 @@ struct _reent
           unsigned char * _nextf[_N_LISTS];
           unsigned int _nmalloc[_N_LISTS];
         } _unused;
+#endif
     } _new;
 
 # ifndef _REENT_GLOBAL_ATEXIT
-- 
2.35.3