"Fossies" - the Fresh Open Source Software Archive

Member "gnuastro-0.8/bootstrapped/lib/stddef.in.h" (28 Dec 2018, 3891 Bytes) of package /linux/privat/gnuastro-0.8.tar.lz:


As a special service "Fossies" has tried to format the requested source page into HTML format using (guessed) C and C++ source code syntax highlighting (style: standard) with prefixed line numbers and code folding option. Alternatively you can here view or download the uninterpreted source code file. See also the last Fossies "Diffs" side-by-side code changes report for "stddef.in.h": 0.5_vs_0.6.

    1 /* A substitute for POSIX 2008 <stddef.h>, for platforms that have issues.
    2 
    3    Copyright (C) 2009-2018 Free Software Foundation, Inc.
    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
   16    along with this program; if not, see <https://www.gnu.org/licenses/>.  */
   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 
   40 # if !(defined _@GUARD_PREFIX@_STDDEF_H && defined _GL_STDDEF_WINT_T)
   41 #  ifdef __need_wint_t
   42 #   define _GL_STDDEF_WINT_T
   43 #  endif
   44 #  @INCLUDE_NEXT@ @NEXT_STDDEF_H@
   45 # endif
   46 
   47 #else
   48 /* Normal invocation convention.  */
   49 
   50 # ifndef _@GUARD_PREFIX@_STDDEF_H
   51 
   52 /* The include_next requires a split double-inclusion guard.  */
   53 
   54 #  @INCLUDE_NEXT@ @NEXT_STDDEF_H@
   55 
   56 /* On NetBSD 5.0, the definition of NULL lacks proper parentheses.  */
   57 #  if (@REPLACE_NULL@ \
   58        && (!defined _@GUARD_PREFIX@_STDDEF_H || defined _GL_STDDEF_WINT_T))
   59 #   undef NULL
   60 #   ifdef __cplusplus
   61    /* ISO C++ says that the macro NULL must expand to an integer constant
   62       expression, hence '((void *) 0)' is not allowed in C++.  */
   63 #    if __GNUG__ >= 3
   64     /* GNU C++ has a __null macro that behaves like an integer ('int' or
   65        'long') but has the same size as a pointer.  Use that, to avoid
   66        warnings.  */
   67 #     define NULL __null
   68 #    else
   69 #     define NULL 0L
   70 #    endif
   71 #   else
   72 #    define NULL ((void *) 0)
   73 #   endif
   74 #  endif
   75 
   76 #  ifndef _@GUARD_PREFIX@_STDDEF_H
   77 #   define _@GUARD_PREFIX@_STDDEF_H
   78 
   79 /* Some platforms lack wchar_t.  */
   80 #if !@HAVE_WCHAR_T@
   81 # define wchar_t int
   82 #endif
   83 
   84 /* Some platforms lack max_align_t.  The check for _GCC_MAX_ALIGN_T is
   85    a hack in case the configure-time test was done with g++ even though
   86    we are currently compiling with gcc.  */
   87 #if ! (@HAVE_MAX_ALIGN_T@ || defined _GCC_MAX_ALIGN_T)
   88 # if !GNULIB_defined_max_align_t
   89 /* On the x86, the maximum storage alignment of double, long, etc. is 4,
   90    but GCC's C11 ABI for x86 says that max_align_t has an alignment of 8,
   91    and the C11 standard allows this.  Work around this problem by
   92    using __alignof__ (which returns 8 for double) rather than _Alignof
   93    (which returns 4), and align each union member accordingly.  */
   94 #  ifdef __GNUC__
   95 #   define _GL_STDDEF_ALIGNAS(type) \
   96       __attribute__ ((__aligned__ (__alignof__ (type))))
   97 #  else
   98 #   define _GL_STDDEF_ALIGNAS(type) /* */
   99 #  endif
  100 typedef union
  101 {
  102   char *__p _GL_STDDEF_ALIGNAS (char *);
  103   double __d _GL_STDDEF_ALIGNAS (double);
  104   long double __ld _GL_STDDEF_ALIGNAS (long double);
  105   long int __i _GL_STDDEF_ALIGNAS (long int);
  106 } rpl_max_align_t;
  107 #  define max_align_t rpl_max_align_t
  108 #  define GNULIB_defined_max_align_t 1
  109 # endif
  110 #endif
  111 
  112 #  endif /* _@GUARD_PREFIX@_STDDEF_H */
  113 # endif /* _@GUARD_PREFIX@_STDDEF_H */
  114 #endif /* __need_XXX */