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Clang compile error

From: Lawrence Murray
Subject: Clang compile error
Date: Sat, 17 Nov 2018 09:30:06 +0800
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:45.0) Gecko/20100101 Thunderbird/45.8.0

Just wanted to report a minor issue that I encountered yesterday after upgrading to Bison 3.2.1 and Xcode 10.1 on macOS, for which the corresponding compiler is "Apple LLVM version 10.0.0 (clang-1000.11.45.5)".

I get the following error when compiling C++ code generated from bison:

parser.cpp:1395:8: error: an attribute list cannot appear here
static _Noreturn void
parser.cpp:231:21: note: expanded from macro '_Noreturn'
#  define _Noreturn [[noreturn]]

I believe the standard syntax is that the attribute should appear before the "static" keyword, so "_Noreturn static void" instead of "static _Noreturn void", although other compilers are more forgiving.

A quick fix in the meantime is to add "-D_Noreturn=" to the C++ compiler flags, as the attribute is not essential.



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