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Date: Thu, 11 Sep 2014 05:01:10 +0200
From: Natanael Copa <>
Subject: Re: _Alignas in i386/bits/

On Wed, Sep 10, 2014 at 1:22 PM, Szabolcs Nagy <> wrote:
> _Alignas usage in the definition of max_align_t
> is visible in stddef.h when __cplusplus >= 201103L
> there should be a
>  #if __cplusplus >= 201103L
>  #define _Alignas alignas
>  #endif
> somewhere, or use alignas ifdef __cpluslpus in alltypes
> it may be reasonable to define _Alignas and _Noreturn
> in features.h to the c++11 equivalents in c++ mode

FYI. This issue breaks qt5 build and xulrunner/firefox build on x86.


#include <iostream>
#include <cstddef>
int main()
    std::cout << alignof(::max_align_t) << '\n';


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