diff options
Diffstat (limited to 'lib/flexmember.h')
| -rw-r--r-- | lib/flexmember.h | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/lib/flexmember.h b/lib/flexmember.h index 6ef66a32..b4d86c29 100644 --- a/lib/flexmember.h +++ b/lib/flexmember.h @@ -1,6 +1,6 @@ /* Sizes of structs with flexible array members. - Copyright 2016-2024 Free Software Foundation, Inc. + Copyright 2016-2025 Free Software Foundation, Inc. This file is part of the GNU C Library. @@ -28,11 +28,12 @@ #include <stddef.h> /* Nonzero multiple of alignment of TYPE, suitable for FLEXSIZEOF below. - On older platforms without _Alignof, use a pessimistic bound that is + If _Alignof might not exist or might not work correctly on + structs with flexible array members, use a pessimistic bound that is safe in practice even if FLEXIBLE_ARRAY_MEMBER is 1. - On newer platforms, use _Alignof to get a tighter bound. */ + Otherwise, 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) |