stddef.h
========

POSIX specification:
 http://www.opengroup.org/onlinepubs/9699919799/basedefs/stddef.h.html

Gnulib module: stddef

Portability problems fixed by Gnulib:

  * Some old platforms fail to provide wchar_t.

  * Some platforms provide a NULL macro that cannot be used in arbitrary expressions: NetBSD 5.0

Portability problems not fixed by Gnulib:

  * Some platforms provide an offsetof macro that cannot be used in arbitrary expressions: Solaris 11 2011-11 This problem can be worked around by parenthesizing the offsetof expression in the unlikely case you use it with sizeof or [].