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-rw-r--r--tests/stdalign.in.h48
1 files changed, 27 insertions, 21 deletions
diff --git a/tests/stdalign.in.h b/tests/stdalign.in.h
index bbfa9ac..3b117df 100644
--- a/tests/stdalign.in.h
+++ b/tests/stdalign.in.h
@@ -1,19 +1,19 @@
/* A substitute for ISO C11 <stdalign.h>.
- Copyright 2011-2018 Free Software Foundation, Inc.
+ Copyright 2011-2022 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
- the Free Software Foundation; either version 3, or (at your option)
- any later version.
+ This file is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation; either version 2.1 of the
+ License, or (at your option) any later version.
- This program is distributed in the hope that it will be useful,
+ This file is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
+ GNU Lesser 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 <https://www.gnu.org/licenses/>. */
+ You should have received a copy of the GNU Lesser General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Paul Eggert and Bruno Haible. */
@@ -34,11 +34,12 @@
requirement of a structure member (i.e., slot or field) that is of
type TYPE, as an integer constant expression.
- This differs from GCC's __alignof__ operator, which can yield a
- better-performing alignment for an object of that type. For
- example, on x86 with GCC, __alignof__ (double) and __alignof__
- (long long) are 8, whereas alignof (double) and alignof (long long)
- are 4 unless the option '-malign-double' is used.
+ This differs from GCC's and clang's __alignof__ operator, which can
+ yield a better-performing alignment for an object of that type. For
+ example, on x86 with GCC and on Linux/x86 with clang,
+ __alignof__ (double) and __alignof__ (long long) are 8, whereas
+ alignof (double) and alignof (long long) are 4 unless the option
+ '-malign-double' is used.
The result cannot be used as a value for an 'enum' constant, if you
want to be portable to HP-UX 10.20 cc and AIX 3.2.5 xlc.
@@ -53,9 +54,12 @@
#undef _Alignof
/* GCC releases before GCC 4.9 had a bug in _Alignof. See GCC bug 52023
- <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52023>. */
+ <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52023>.
+ clang versions < 8.0.0 have the same bug. */
#if (!defined __STDC_VERSION__ || __STDC_VERSION__ < 201112 \
- || (defined __GNUC__ && __GNUC__ < 4 + (__GNUC_MINOR__ < 9)))
+ || (defined __GNUC__ && __GNUC__ < 4 + (__GNUC_MINOR__ < 9) \
+ && !defined __clang__) \
+ || (defined __clang__ && __clang_major__ < 8))
# ifdef __cplusplus
# if 201103 <= __cplusplus
# define _Alignof(type) alignof (type)
@@ -100,11 +104,13 @@
#if !defined __STDC_VERSION__ || __STDC_VERSION__ < 201112
# if defined __cplusplus && 201103 <= __cplusplus
# define _Alignas(a) alignas (a)
-# elif ((defined __APPLE__ && defined __MACH__ \
- ? 4 < __GNUC__ + (1 <= __GNUC_MINOR__) \
- : __GNUC__) \
- || (__ia64 && (61200 <= __HP_cc || 61200 <= __HP_aCC)) \
- || __ICC || 0x590 <= __SUNPRO_C || 0x0600 <= __xlC__)
+# elif (!defined __attribute__ \
+ && ((defined __APPLE__ && defined __MACH__ \
+ ? 4 < __GNUC__ + (1 <= __GNUC_MINOR__) \
+ : __GNUC__ && !defined __ibmxl__) \
+ || (4 <= __clang_major__) \
+ || (__ia64 && (61200 <= __HP_cc || 61200 <= __HP_aCC)) \
+ || __ICC || 0x590 <= __SUNPRO_C || 0x0600 <= __xlC__))
# define _Alignas(a) __attribute__ ((__aligned__ (a)))
# elif 1300 <= _MSC_VER
# define _Alignas(a) __declspec (align (a))