* 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."
---
ChangeLog | 7 +++++++
lib/flexmember.h | 2 +-
2 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/ChangeLog b/ChangeLog
index a2495cc31a..35e25d2c03 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,12 @@
2025-01-18 Paul Eggert <egg...@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.
diff --git a/lib/flexmember.h b/lib/flexmember.h
index 15ee4f5e28..0168af0eca 100644
--- a/lib/flexmember.h
+++ b/lib/flexmember.h
@@ -32,7 +32,7 @@
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)
--
2.45.2
