HCoop / bpt / emacs.git / blame
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|---|---|---|
| 1fd182f0 PE |
1 | /* A substitute for POSIX 2008 <stddef.h>, for platforms that have issues. |
| 2 | ||
| ba318903 | 3 | Copyright (C) 2009-2014 Free Software Foundation, Inc. |
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4 | |
| 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) | |
| 8 | any later version. | |
| 9 | ||
| 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. | |
| 14 | ||
| 15 | You should have received a copy of the GNU General Public License | |
| caf8a9b2 | 16 | along with this program; if not, see <http://www.gnu.org/licenses/>. */ |
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17 | |
| 18 | /* Written by Eric Blake. */ | |
| 19 | ||
| 20 | /* | |
| 21 | * POSIX 2008 <stddef.h> for platforms that have issues. | |
| 22 | * <http://www.opengroup.org/susv3xbd/stddef.h.html> | |
| 23 | */ | |
| 24 | ||
| 25 | #if __GNUC__ >= 3 | |
| 26 | @PRAGMA_SYSTEM_HEADER@ | |
| 27 | #endif | |
| 28 | @PRAGMA_COLUMNS@ | |
| 29 | ||
| 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. */ | |
| 39 | ||
| 6a3e57bb | 40 | # if !(defined _@GUARD_PREFIX@_STDDEF_H && defined _GL_STDDEF_WINT_T) |
| 1fd182f0 | 41 | # ifdef __need_wint_t |
| 6a3e57bb | 42 | # undef _@GUARD_PREFIX@_STDDEF_H |
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43 | # define _GL_STDDEF_WINT_T |
| 44 | # endif | |
| 45 | # @INCLUDE_NEXT@ @NEXT_STDDEF_H@ | |
| 46 | # endif | |
| 47 | ||
| 48 | #else | |
| 49 | /* Normal invocation convention. */ | |
| 50 | ||
| 6a3e57bb | 51 | # ifndef _@GUARD_PREFIX@_STDDEF_H |
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52 | |
| 53 | /* The include_next requires a split double-inclusion guard. */ | |
| 54 | ||
| 55 | # @INCLUDE_NEXT@ @NEXT_STDDEF_H@ | |
| 56 | ||
| 6a3e57bb PE |
57 | # ifndef _@GUARD_PREFIX@_STDDEF_H |
| 58 | # define _@GUARD_PREFIX@_STDDEF_H | |
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59 | |
| 60 | /* On NetBSD 5.0, the definition of NULL lacks proper parentheses. */ | |
| 61 | #if @REPLACE_NULL@ | |
| 62 | # undef NULL | |
| 63 | # ifdef __cplusplus | |
| 64 | /* ISO C++ says that the macro NULL must expand to an integer constant | |
| 65 | expression, hence '((void *) 0)' is not allowed in C++. */ | |
| 66 | # if __GNUG__ >= 3 | |
| 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 | |
| 69 | warnings. */ | |
| 70 | # define NULL __null | |
| 71 | # else | |
| 72 | # define NULL 0L | |
| 73 | # endif | |
| 74 | # else | |
| 75 | # define NULL ((void *) 0) | |
| 76 | # endif | |
| 77 | #endif | |
| 78 | ||
| 79 | /* Some platforms lack wchar_t. */ | |
| 80 | #if !@HAVE_WCHAR_T@ | |
| 81 | # define wchar_t int | |
| 82 | #endif | |
| 83 | ||
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84 | # endif /* _@GUARD_PREFIX@_STDDEF_H */ |
| 85 | # endif /* _@GUARD_PREFIX@_STDDEF_H */ | |
| 1fd182f0 | 86 | #endif /* __need_XXX */ |