From e8bd88d1fcded01ccd066572eeaae1b507989cb3 Mon Sep 17 00:00:00 2001 From: RincewindsHat <12514511+RincewindsHat@users.noreply.github.com> Date: Tue, 31 Jan 2023 14:46:01 +0100 Subject: Sync with the latest Gnulib code 668c0b8ffa --- gl/stdalign.in.h | 78 ++++++++++++++++++++++++++++++++++++++------------------ 1 file changed, 53 insertions(+), 25 deletions(-) (limited to 'gl/stdalign.in.h') diff --git a/gl/stdalign.in.h b/gl/stdalign.in.h index 7254a3de..7f9dbb46 100644 --- a/gl/stdalign.in.h +++ b/gl/stdalign.in.h @@ -1,19 +1,19 @@ /* A substitute for ISO C11 . - Copyright 2011-2013 Free Software Foundation, Inc. + Copyright 2011-2023 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 . */ + You should have received a copy of the GNU Lesser General Public License + along with this program. If not, see . */ /* Written by Paul Eggert and Bruno Haible. */ @@ -34,17 +34,15 @@ 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. - - Include for offsetof. */ -#include + want to be portable to HP-UX 10.20 cc and AIX 3.2.5 xlc. */ /* FreeBSD 9.1 , included by and lots of other standard headers, defines conflicting implementations of _Alignas @@ -52,19 +50,33 @@ #undef _Alignas #undef _Alignof -#if !defined __STDC_VERSION__ || __STDC_VERSION__ < 201112 +/* GCC releases before GCC 4.9 had a bug in _Alignof. See GCC bug 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 __clang__) \ + || (defined __clang__ && __clang_major__ < 8)) # ifdef __cplusplus -# if 201103 <= __cplusplus +# if (201103 <= __cplusplus || defined _MSC_VER) # define _Alignof(type) alignof (type) # else template struct __alignof_helper { char __a; __t __b; }; # define _Alignof(type) offsetof (__alignof_helper, __b) +# define _GL_STDALIGN_NEEDS_STDDEF 1 # endif # else -# define _Alignof(type) offsetof (struct { char __a; type __b; }, __b) +# if (defined __GNUC__ && 4 <= __GNUC__) || defined __clang__ +# define _Alignof(type) __builtin_offsetof (struct { char __a; type __b; }, __b) +# else +# define _Alignof(type) offsetof (struct { char __a; type __b; }, __b) +# define _GL_STDALIGN_NEEDS_STDDEF 1 +# endif # endif #endif -#define alignof _Alignof +#if ! (defined __cplusplus && (201103 <= __cplusplus || defined _MSC_VER)) +# define alignof _Alignof +#endif #define __alignof_is_defined 1 /* alignas (A), also known as _Alignas (A), aligns a variable or type @@ -93,17 +105,33 @@ */ #if !defined __STDC_VERSION__ || __STDC_VERSION__ < 201112 -# if defined __cplusplus && 201103 <= __cplusplus +# if defined __cplusplus && (201103 <= __cplusplus || defined _MSC_VER) # define _Alignas(a) alignas (a) -# elif __GNUC__ || __IBMC__ || __IBMCPP__ || __ICC || 0x5110 <= __SUNPRO_C +# 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)) # endif #endif -#if defined _Alignas || (defined __STDC_VERSION && 201112 <= __STDC_VERSION__) +#if ((defined _Alignas \ + && !(defined __cplusplus && (201103 <= __cplusplus || defined _MSC_VER))) \ + || (defined __STDC_VERSION__ && 201112 <= __STDC_VERSION__)) # define alignas _Alignas +#endif +#if (defined alignas \ + || (defined __cplusplus && (201103 <= __cplusplus || defined _MSC_VER))) # define __alignas_is_defined 1 #endif +/* Include if needed for offsetof. */ +#if _GL_STDALIGN_NEEDS_STDDEF +# include +#endif + #endif /* _GL_STDALIGN_H */ -- cgit v1.2.3-74-g34f1