--- embedaddon/libiconv/srclib/stddef.in.h	2012/05/29 09:29:43	1.1.1.1
+++ embedaddon/libiconv/srclib/stddef.in.h	2021/03/17 13:38:46	1.1.1.2
@@ -1,6 +1,6 @@
 /* A substitute for POSIX 2008 <stddef.h>, for platforms that have issues.
 
-   Copyright (C) 2009-2011 Free Software Foundation, Inc.
+   Copyright (C) 2009-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -13,8 +13,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU 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 <https://www.gnu.org/licenses/>.  */
 
 /* Written by Eric Blake.  */
 
@@ -40,7 +39,6 @@
 
 # if !(defined _@GUARD_PREFIX@_STDDEF_H && defined _GL_STDDEF_WINT_T)
 #  ifdef __need_wint_t
-#   undef _@GUARD_PREFIX@_STDDEF_H
 #   define _GL_STDDEF_WINT_T
 #  endif
 #  @INCLUDE_NEXT@ @NEXT_STDDEF_H@
@@ -55,31 +53,60 @@
 
 #  @INCLUDE_NEXT@ @NEXT_STDDEF_H@
 
-#  ifndef _@GUARD_PREFIX@_STDDEF_H
-#   define _@GUARD_PREFIX@_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
+
+/* Some platforms lack max_align_t.  The check for _GCC_MAX_ALIGN_T is
+   a hack in case the configure-time test was done with g++ even though
+   we are currently compiling with gcc.  */
+#if ! (@HAVE_MAX_ALIGN_T@ || defined _GCC_MAX_ALIGN_T)
+# if !GNULIB_defined_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);
+} rpl_max_align_t;
+#  define max_align_t rpl_max_align_t
+#  define GNULIB_defined_max_align_t 1
+# endif
 #endif
 
 #  endif /* _@GUARD_PREFIX@_STDDEF_H */