* lib/flexmember.h (FLEXALIGNOF): Use the conservative definition
if _Alignof is a macro, to avoid a C99 conformance issue exposed
by IBM XL C 16.1 which otherwise complains "An aggregate
containing a flexible array member cannot be used as a member of a
structure or as an array element."
2025-01-18 Paul Eggert <eggert@cs.ucla.edu>
+ flexmember: port to IBM XL C 16.1
+ * lib/flexmember.h (FLEXALIGNOF): Use the conservative definition
+ if _Alignof is a macro, to avoid a C99 conformance issue exposed
+ by IBM XL C 16.1 which otherwise complains "An aggregate
+ containing a flexible array member cannot be used as a member of a
+ structure or as an array element."
+
alignasof: port to IBM XL C 16.1
* doc/gnulib.texi (alignof):
Improve doc to match implementationa better.
safe in practice even if FLEXIBLE_ARRAY_MEMBER is 1.
On newer platforms, use _Alignof to get a tighter bound. */
-#if !defined __STDC_VERSION__ || __STDC_VERSION__ < 201112
+#if !defined __STDC_VERSION__ || __STDC_VERSION__ < 201112 || defined _Alignof
# define FLEXALIGNOF(type) (sizeof (type) & ~ (sizeof (type) - 1))
#else
# define FLEXALIGNOF(type) _Alignof (type)