+2019-12-03 Bruno Haible <bruno@clisp.org>
+
+ Avoid hassles caused by [[noreturn]] in C++.
+ Reported by Christian Biesinger <cbiesinger@google.com> in
+ <https://lists.gnu.org/archive/html/bug-gnulib/2019-12/msg00010.html>.
+ * m4/gnulib-common.m4 (gl_COMMON_BODY): Disable the use of [[noreturn]].
+ * lib/_Noreturn.h: Likewise.
+
2019-12-02 Bruno Haible <bruno@clisp.org>
Fix mistakes in --enable-threads=isoc fixes from 2019-12-01.
#ifndef _Noreturn
# if (defined __cplusplus \
&& ((201103 <= __cplusplus && !(__GNUC__ == 4 && __GNUC_MINOR__ == 7)) \
- || (defined _MSC_VER && 1900 <= _MSC_VER)))
+ || (defined _MSC_VER && 1900 <= _MSC_VER)) \
+ && 0)
+ /* [[noreturn]] is not practically usable, because with it the syntax
+ extern _Noreturn void func (...);
+ would not be valid; such a declaration would only be valid with 'extern'
+ and '_Noreturn' swapped, or without the 'extern' keyword. However, some
+ AIX system header files and several gnulib header files use precisely
+ this syntax with 'extern'. */
# define _Noreturn [[noreturn]]
# elif ((!defined __cplusplus || defined __clang__) \
&& (201112 <= (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) \
-# gnulib-common.m4 serial 45
+# gnulib-common.m4 serial 46
dnl Copyright (C) 2007-2019 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
#ifndef _Noreturn
# if (defined __cplusplus \
&& ((201103 <= __cplusplus && !(__GNUC__ == 4 && __GNUC_MINOR__ == 7)) \
- || (defined _MSC_VER && 1900 <= _MSC_VER)))
+ || (defined _MSC_VER && 1900 <= _MSC_VER)) \
+ && 0)
+ /* [[noreturn]] is not practically usable, because with it the syntax
+ extern _Noreturn void func (...);
+ would not be valid; such a declaration would only be valid with 'extern'
+ and '_Noreturn' swapped, or without the 'extern' keyword. However, some
+ AIX system header files and several gnulib header files use precisely
+ this syntax with 'extern'. */
# define _Noreturn [[noreturn]]
# elif ((!defined __cplusplus || defined __clang__) \
&& (201112 <= (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) \