diff options
Diffstat (limited to 'lib/stddef.in.h')
| -rw-r--r-- | lib/stddef.in.h | 66 |
1 files changed, 44 insertions, 22 deletions
diff --git a/lib/stddef.in.h b/lib/stddef.in.h index b1dfb674..383d4413 100644 --- a/lib/stddef.in.h +++ b/lib/stddef.in.h @@ -1,6 +1,6 @@ /* A substitute for POSIX 2008 <stddef.h>, for platforms that have issues. - Copyright (C) 2009, 2010 Free Software Foundation, Inc. + Copyright (C) 2009-2015 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by @@ -13,8 +13,7 @@ GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ + along with this program; if not, see <http://www.gnu.org/licenses/>. */ /* Written by Eric Blake. */ @@ -26,6 +25,7 @@ #if __GNUC__ >= 3 @PRAGMA_SYSTEM_HEADER@ #endif +@PRAGMA_COLUMNS@ #if defined __need_wchar_t || defined __need_size_t \ || defined __need_ptrdiff_t || defined __need_NULL \ @@ -37,9 +37,8 @@ remember if special invocation has ever been used to obtain wint_t, in which case we need to clean up NULL yet again. */ -# if !(defined _GL_STDDEF_H && defined _GL_STDDEF_WINT_T) +# if !(defined _@GUARD_PREFIX@_STDDEF_H && defined _GL_STDDEF_WINT_T) # ifdef __need_wint_t -# undef _GL_STDDEF_H # define _GL_STDDEF_WINT_T # endif # @INCLUDE_NEXT@ @NEXT_STDDEF_H@ @@ -48,39 +47,62 @@ #else /* Normal invocation convention. */ -# ifndef _GL_STDDEF_H +# ifndef _@GUARD_PREFIX@_STDDEF_H /* The include_next requires a split double-inclusion guard. */ # @INCLUDE_NEXT@ @NEXT_STDDEF_H@ -# ifndef _GL_STDDEF_H -# define _GL_STDDEF_H - /* On NetBSD 5.0, the definition of NULL lacks proper parentheses. */ -#if @REPLACE_NULL@ -# undef NULL -# ifdef __cplusplus +# if (@REPLACE_NULL@ \ + && (!defined _@GUARD_PREFIX@_STDDEF_H || defined _GL_STDDEF_WINT_T)) +# undef NULL +# ifdef __cplusplus /* ISO C++ says that the macro NULL must expand to an integer constant expression, hence '((void *) 0)' is not allowed in C++. */ -# if __GNUG__ >= 3 +# if __GNUG__ >= 3 /* GNU C++ has a __null macro that behaves like an integer ('int' or 'long') but has the same size as a pointer. Use that, to avoid warnings. */ -# define NULL __null -# else -# define NULL 0L +# define NULL __null +# else +# define NULL 0L +# endif +# else +# define NULL ((void *) 0) +# endif # endif -# else -# define NULL ((void *) 0) -# endif -#endif + +# ifndef _@GUARD_PREFIX@_STDDEF_H +# define _@GUARD_PREFIX@_STDDEF_H /* Some platforms lack wchar_t. */ #if !@HAVE_WCHAR_T@ # define wchar_t int #endif -# endif /* _GL_STDDEF_H */ -# endif /* _GL_STDDEF_H */ +/* Some platforms lack max_align_t. */ +#if !@HAVE_MAX_ALIGN_T@ +/* On the x86, the maximum storage alignment of double, long, etc. is 4, + but GCC's C11 ABI for x86 says that max_align_t has an alignment of 8, + and the C11 standard allows this. Work around this problem by + using __alignof__ (which returns 8 for double) rather than _Alignof + (which returns 4), and align each union member accordingly. */ +# ifdef __GNUC__ +# define _GL_STDDEF_ALIGNAS(type) \ + __attribute__ ((__aligned__ (__alignof__ (type)))) +# else +# define _GL_STDDEF_ALIGNAS(type) /* */ +# endif +typedef union +{ + char *__p _GL_STDDEF_ALIGNAS (char *); + double __d _GL_STDDEF_ALIGNAS (double); + long double __ld _GL_STDDEF_ALIGNAS (long double); + long int __i _GL_STDDEF_ALIGNAS (long int); +} max_align_t; +#endif + +# endif /* _@GUARD_PREFIX@_STDDEF_H */ +# endif /* _@GUARD_PREFIX@_STDDEF_H */ #endif /* __need_XXX */ |