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| author | Andy Wingo <wingo@pobox.com> | 2021-01-20 21:52:54 +0100 |
|---|---|---|
| committer | Andy Wingo <wingo@pobox.com> | 2021-01-20 23:03:56 +0100 |
| commit | a91b95cca2d397c84f8b9bbd602d40209a7092ce (patch) | |
| tree | 2c286a291f5a2b812d6e216be10936f2709d59cf /lib/stdalign.in.h | |
| parent | 758b31994cff582c7e8785b4cc2240dbf3573837 (diff) | |
| download | guile-a91b95cca2d397c84f8b9bbd602d40209a7092ce.tar.gz | |
Update Gnulib to v0.1-4379-g2ef5a9b4b
Also bump required autoconf version to 2.64, as required by Gnulib.
Diffstat (limited to 'lib/stdalign.in.h')
| -rw-r--r-- | lib/stdalign.in.h | 27 |
1 files changed, 16 insertions, 11 deletions
diff --git a/lib/stdalign.in.h b/lib/stdalign.in.h index 2c00533d6..597293db8 100644 --- a/lib/stdalign.in.h +++ b/lib/stdalign.in.h @@ -1,6 +1,6 @@ /* A substitute for ISO C11 <stdalign.h>. - Copyright 2011-2017 Free Software Foundation, Inc. + Copyright 2011-2021 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by @@ -13,7 +13,7 @@ GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser 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/>. */ /* 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 - <http://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) @@ -102,8 +106,9 @@ # define _Alignas(a) alignas (a) # elif ((defined __APPLE__ && defined __MACH__ \ ? 4 < __GNUC__ + (1 <= __GNUC_MINOR__) \ - : __GNUC__) \ - || 061200 <= __HP_cc || 061200 <= __HP_aCC \ + : __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 |