2 @section @file{stddef.h}
4 POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/basedefs/stddef.h.html}
8 Portability problems fixed by Gnulib:
11 Some old platforms fail to provide @code{wchar_t}.
14 Some platforms provide a @code{NULL} macro that cannot be used in arbitrary
19 Portability problems not fixed by Gnulib:
22 Some platforms provide an @code{offsetof} macro that cannot be used in
23 arbitrary expressions:
25 This problem can be worked around by parenthesizing the
26 @code{offsetof} expression in the unlikely case you use it with
27 @code{sizeof} or @samp{[]}.