/* Determine alignment of types.
- Copyright (C) 2003-2004, 2006, 2009-2016 Free Software Foundation, Inc.
+ Copyright (C) 2003-2004, 2006, 2009-2021 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
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, see <http://www.gnu.org/licenses/>. */
+ along with this program; if not, see <https://www.gnu.org/licenses/>. */
#ifndef _ALIGNOF_H
#define _ALIGNOF_H
/* alignof_type (TYPE)
Determine the good alignment of an object of the given type at compile time.
Note that this is not necessarily the same as alignof_slot(type).
- For example, with GNU C on x86 platforms: alignof_type(double) = 8, but
+ For example, with GNU C on x86 platforms and with clang on Linux/x86:
+ alignof_type(long long) = 8, but alignof_slot(long long) = 4.
+ And alignof_type(double) = 8, but
- when -malign-double is not specified: alignof_slot(double) = 4,
- when -malign-double is specified: alignof_slot(double) = 8.
Note: The result cannot be used as a value for an 'enum' constant,
due to bugs in HP-UX 10.20 cc and AIX 3.2.5 xlc. */
-#if defined __GNUC__ || defined __IBM__ALIGNOF__
+#if defined __GNUC__ || defined __clang__ || defined __IBM__ALIGNOF__
# define alignof_type __alignof__
#else
# define alignof_type alignof_slot