[cfe-dev] Does clang now emit [abi:cxx11] unconditionally when used with libstdc++?

[Andrey Bokhanko via cfe-dev]

As I understand, -D_GLIBCXX_USE_CXX11_ABI is a library flag, not compiler
one, so clang should work with libstdc++ *exactly* as gcc5+ do. See
http://developers.redhat.com/blog/2015/02/05/gcc5-and-the-c11-abi/ for
details.

Yours,
Andrey

On Monday, August 15, 2016, Renato Golin <renato.golin at linaro.org> wrote:

> On 15 August 2016 at 15:58, Maria Gottschalk via cfe-dev
> <cfe-dev at lists.llvm.org <javascript:;>> wrote:
> > So, is it correct that clang-3.9.0 unconditionally compiles for the new
> abi? That gcc 4.x.y is no longer usable and that you must have gcc 5+ if
> you want to use libstdc++?
>
> Oh bother! Adding Dmitry, as he wrote the code [1].
>
> I was under the impression that, if you didn't use the tag, nothing
> would have changed.
>
> We don't have many compile-time options like GCC, so this would have
> to be a run-time option, if needed.
>
> cheers,
> --renato
>
> [1] https://reviews.llvm.org/D18035 and https://reviews.llvm.org/D17567
>
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