1
/* A substitute for POSIX 2008 <stddef.h>, for platforms that have issues.
3
Copyright (C) 2009 Free Software Foundation, Inc.
5
This program is free software; you can redistribute it and/or modify
6
it under the terms of the GNU General Public License as published by
7
the Free Software Foundation; either version 3, or (at your option)
10
This program is distributed in the hope that it will be useful,
11
but WITHOUT ANY WARRANTY; without even the implied warranty of
12
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13
GNU General Public License for more details.
15
You should have received a copy of the GNU General Public License
16
along with this program; if not, write to the Free Software Foundation,
17
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
19
/* Written by Eric Blake. */
22
* POSIX 2008 <stddef.h> for platforms that have issues.
23
* <http://www.opengroup.org/susv3xbd/stddef.h.html>
27
@PRAGMA_SYSTEM_HEADER@
30
#if defined __need_wchar_t || defined __need_size_t \
31
|| defined __need_ptrdiff_t || defined __need_NULL \
32
|| defined __need_wint_t
33
/* Special invocation convention inside gcc header files. In
34
particular, gcc provides a version of <stddef.h> that blindly
35
redefines NULL even when __need_wint_t was defined, even though
36
wint_t is not normally provided by <stddef.h>. Hence, we must
37
remember if special invocation has ever been used to obtain wint_t,
38
in which case we need to clean up NULL yet again. */
40
# if !(defined _GL_STDDEF_H && defined _GL_STDDEF_WINT_T)
43
# define _GL_STDDEF_WINT_T
45
# @INCLUDE_NEXT@ @NEXT_STDDEF_H@
49
/* Normal invocation convention. */
53
/* The include_next requires a split double-inclusion guard. */
55
# @INCLUDE_NEXT@ @NEXT_STDDEF_H@
60
/* On NetBSD 5.0, the definition of NULL lacks proper parentheses. */
64
/* ISO C++ says that the macro NULL must expand to an integer constant
65
expression, hence '((void *) 0)' is not allowed in C++. */
67
/* GNU C++ has a __null macro that behaves like an integer ('int' or
68
'long') but has the same size as a pointer. Use that, to avoid
75
# define NULL ((void *) 0)
79
/* Some platforms lack wchar_t. */
84
# endif /* _GL_STDDEF_H */
85
# endif /* _GL_STDDEF_H */
86
#endif /* __need_XXX */