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c: more fixes for _Noreturn

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The previous fix was insufficient.

    tests/types.at:366: $CXX $CXXFLAGS $CPPFLAGS  $LDFLAGS -o test test.cc $LIBS
    ++ ccache clang++-mp-9.0 -Qunused-arguments -ggdb -Wall -Wextra -Wcast-align -Wchar-subscripts -fparse-all-comments -Wdocumentation -Wformat -Wimplicit-fallthrough -Wnull-dereference -Wno-sign-compare -Wno-tautological-constant-out-of-range-compare -Wpointer-arith -Wshadow -Wwrite-strings -Wextra-semi -Wold-style-cast -Wundefined-func-template -Wweak-vtables -Wunreachable-code -Wundef -pedantic -Wconversion -Wdeprecated -Wsign-compare -Wsign-conversion -Wtautological-constant-out-of-range-compare -fno-color-diagnostics -Wno-keyword-macro -Werror -std=c++98 -I/Users/akim/src/gnu/bison/tests -isystem /opt/gostai/include -isystem /opt/local/include -L/opt/gostai/lib -L/opt/local/lib -o test test.cc /Users/akim/src/gnu/bison/_build/c9d/lib/libbison.a -lintl -Wl,-framework -Wl,CoreFoundation
    stderr:
    test.cc:955:1: error: _Noreturn functions are a C11-specific feature [-Werror,-Wc11-extensions]
    _Noreturn static void
    ^
    test.cc:963:1: error: _Noreturn functions are a C11-specific feature [-Werror,-Wc11-extensions]
    _Noreturn static void
    ^
    2 errors generated.

* data/skeletons/c.m4 (b4_attribute_define): Do not use _Noreturn at
all in C++, clang or not.
This commit is contained in:
Akim Demaille
2020-05-16 18:26:34 +02:00
parent 22c3839168
commit e6d83116ae
1 changed files with 3 additions and 2 deletions
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5
data/skeletons/c.m4
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@@ -359,13 +359,14 @@ m4_define([b4_attribute_define],
dnl the use of [[noreturn]], because _Noreturn is used in places
dnl where [[noreturn]] works in C++. We need this in particular
dnl because of glr.cc which compiles code from glr.c in C++.
dnl And the C++ compiler chokes on _Noreturn.
dnl And the C++ compiler chokes on _Noreturn. Also, we do not
dnl use C' _Noreturn in C++, to avoid -Wc11-extensions warnings.
[#ifndef _Noreturn
# if (defined __cplusplus \
&& ((201103 <= __cplusplus && !(__GNUC__ == 4 && __GNUC_MINOR__ == 7)) \
|| (defined _MSC_VER && 1900 <= _MSC_VER)))
# define _Noreturn [[noreturn]]
# elif ((!defined __cplusplus || defined __clang__) \
# elif (!defined __cplusplus \
&& (201112 <= (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) \
|| 4 < __GNUC__ + (7 <= __GNUC_MINOR__) \
|| (defined __apple_build_version__ \