| 1 | /* A substitute for POSIX 2008 <stddef.h>, for platforms that have issues.
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| 2 |
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| 3 | Copyright (C) 2009-2012 Free Software Foundation, Inc.
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| 4 |
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| 5 | This program is free software; you can redistribute it and/or modify
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| 6 | it under the terms of the GNU General Public License as published by
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| 7 | the Free Software Foundation; either version 3, or (at your option)
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| 8 | any later version.
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| 9 |
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| 10 | This program is distributed in the hope that it will be useful,
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | GNU General Public License for more details.
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| 14 |
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| 15 | You should have received a copy of the GNU General Public License
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| 16 | along with this program; if not, see <http://www.gnu.org/licenses/>. */
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| 17 |
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| 18 | /* Written by Eric Blake. */
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| 19 |
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| 20 | /*
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| 21 | * POSIX 2008 <stddef.h> for platforms that have issues.
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| 22 | * <http://www.opengroup.org/susv3xbd/stddef.h.html>
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| 23 | */
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| 24 |
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| 25 | #if __GNUC__ >= 3
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| 26 | @PRAGMA_SYSTEM_HEADER@
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| 27 | #endif
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| 28 | @PRAGMA_COLUMNS@
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| 29 |
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| 30 | #if defined __need_wchar_t || defined __need_size_t \
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| 31 | || defined __need_ptrdiff_t || defined __need_NULL \
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| 32 | || defined __need_wint_t
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| 33 | /* Special invocation convention inside gcc header files. In
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| 34 | particular, gcc provides a version of <stddef.h> that blindly
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| 35 | redefines NULL even when __need_wint_t was defined, even though
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| 36 | wint_t is not normally provided by <stddef.h>. Hence, we must
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| 37 | remember if special invocation has ever been used to obtain wint_t,
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| 38 | in which case we need to clean up NULL yet again. */
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| 39 |
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| 40 | # if !(defined _@GUARD_PREFIX@_STDDEF_H && defined _GL_STDDEF_WINT_T)
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| 41 | # ifdef __need_wint_t
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| 42 | # undef _@GUARD_PREFIX@_STDDEF_H
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| 43 | # define _GL_STDDEF_WINT_T
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| 44 | # endif
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| 45 | # @INCLUDE_NEXT@ @NEXT_STDDEF_H@
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| 46 | # endif
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| 47 |
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| 48 | #else
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| 49 | /* Normal invocation convention. */
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| 50 |
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| 51 | # ifndef _@GUARD_PREFIX@_STDDEF_H
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| 52 |
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| 53 | /* The include_next requires a split double-inclusion guard. */
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| 54 |
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| 55 | # @INCLUDE_NEXT@ @NEXT_STDDEF_H@
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| 56 |
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| 57 | # ifndef _@GUARD_PREFIX@_STDDEF_H
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| 58 | # define _@GUARD_PREFIX@_STDDEF_H
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| 59 |
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| 60 | /* On NetBSD 5.0, the definition of NULL lacks proper parentheses. */
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| 61 | #if @REPLACE_NULL@
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| 62 | # undef NULL
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| 63 | # ifdef __cplusplus
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| 64 | /* ISO C++ says that the macro NULL must expand to an integer constant
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| 65 | expression, hence '((void *) 0)' is not allowed in C++. */
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| 66 | # if __GNUG__ >= 3
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| 67 | /* GNU C++ has a __null macro that behaves like an integer ('int' or
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| 68 | 'long') but has the same size as a pointer. Use that, to avoid
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| 69 | warnings. */
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| 70 | # define NULL __null
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| 71 | # else
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| 72 | # define NULL 0L
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| 73 | # endif
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| 74 | # else
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| 75 | # define NULL ((void *) 0)
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| 76 | # endif
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| 77 | #endif
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| 78 |
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| 79 | /* Some platforms lack wchar_t. */
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| 80 | #if !@HAVE_WCHAR_T@
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| 81 | # define wchar_t int
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| 82 | #endif
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| 83 |
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| 84 | # endif /* _@GUARD_PREFIX@_STDDEF_H */
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| 85 | # endif /* _@GUARD_PREFIX@_STDDEF_H */
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| 86 | #endif /* __need_XXX */
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