Author: kan
Date: Thu Aug 21 15:10:10 2014
New Revision: 270277
URL: http://svnweb.freebsd.org/changeset/base/270277

Log:
  Add guards to ptrdiff_t definition in include/stddef.h
  
  Back in 2011 obrien has added the #define macro in sys/sys/stddef.h to
  guard ptrdiff_t. Add similar protection to the identical code in
  include/stddef.h.
  
  Submitted by:   Mariusz Zaborski <osho...@freebsd.org>
  MFC after:      1 week

Modified:
  head/include/stddef.h

Modified: head/include/stddef.h
==============================================================================
--- head/include/stddef.h       Thu Aug 21 15:07:25 2014        (r270276)
+++ head/include/stddef.h       Thu Aug 21 15:10:10 2014        (r270277)
@@ -38,7 +38,10 @@
 #include <sys/_null.h>
 #include <sys/_types.h>
 
+#ifndef _PTRDIFF_T_DECLARED
 typedef        __ptrdiff_t     ptrdiff_t;
+#define        _PTRDIFF_T_DECLARED
+#endif
 
 #if __BSD_VISIBLE
 #ifndef _RUNE_T_DECLARED
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